Furuno FS-1575 User manual

Ku-BAND VSAT
FV - 100
SE R VI C E M ANUA L
www.furuno.co.jp
M O D EL
FS-1575/2575/5075
SSB RADIOTELEPHONE
CONFIDENTIAL for Internal Use Only
This document is only for a service staff of FURUNO products.
Any unauthorized reproduction of any of its content is prohibited.

The paper used in this manual
is elemental chlorine free.
・FURUNO Authorized Distributor/Dealer
9-52 Ashihara-cho,
Nishinomiya, 662-8580, JAPAN
A : JUN 2012
.
Printed in Japan
All rights reserved.
B : NOV . 26, 2012
Pub. No. SME-56770-B
*
00017687610
*
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00017687610
*
(NAYO ) FS-1575/2575/5075
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00017687610
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00017687610
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* 0 0 0 1 7 6 8 7 6 1 0 *

Contents
i
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
Summary
Introduction ····················································································································································· 1
1. Optional Operation······························································································2
2. Software··············································································································3
3. Settings···············································································································4
4. TX output Power Check and Adjustment ····························································5
5. Frequency Adjustment························································································6
6. Replacement of Boards ······················································································7
7. Checks List·········································································································8
8. Comprehensive Tests ·······················································································11
Chapter 1. Overview
1.1 Overview······································································································1-1
1.1.1 System Configuration············································································1-2
1. FS-2575 and -5075 System Configuration··············································1-2
2. FS-1575 System Configuration·······························································1-3
1.2 Installations··································································································1-5
1.2.1 Antenna Wiring······················································································1-5
1. Key Points to Installation of Antenna ······················································1-5
2. Requirements for T/R Antenna································································1-5
3. Receiving Antenna Wiring Configuration·················································1-5
4. Full-Duplex Communications··································································1-6
1.2.2 Selection of Power Supply Cable ··························································1-7
1. Positional Data························································································1-8
2. Connection of MAIN FAIL Signal·····························································1-8
3. EXT BK···································································································1-8
4. Connection of Handset ···········································································1-8
1.3 Operations ···································································································1-9
1.3.1 FS-2575C Control Panel ·······································································1-9
1.3.2 Overview of Display·············································································1-10
1. Status Area···························································································1-10
2. Tab/Guide Area·····················································································1-11
3. Information Display Area·······································································1-11
4. Overview of RT Window········································································1-13
5. Overview of SCAN Window ··································································1-13
6. Overview of DSC Window·····································································1-14
1.3.3 Transmission of Distress Alert ·····························································1-15
1. MULTI···································································································1-15
2. AUTO····································································································1-15
3. SINGLE·································································································1-15
1.3.4 Reception of DSC Message ································································1-16
1.3.5 Audio Alarms·······················································································1-17
Contents

Contents
ii
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
Chapter 2. Parts Location
2.1 Control Unit: FS-2575C················································································2-1
2.2 Transceiver Unit: FS-1575T·········································································2-6
2.3 Transceiver Unit: FS-2575T·······································································2-12
2.4 Transceiver Unit FS-5075T········································································2-19
2.5 Board ·········································································································2-26
1. TX FIL board: 05P0876 (FS-1575)··························································2-26
2. TX FIL board: 05P0870B (FS-2575)·······················································2-27
3. TX FIL board: 05P0870A (FS-5075) ·······················································2-28
4. COMB board: 05P0869 (FS-5075) ·························································2-29
5. PA board: 05P0868 (FS-1575)································································2-30
6. PA board: 05P0867B (FS-2575) ·····························································2-31
7. PA board: 05P0867A (FS-5075)······························································2-32
8. DRV board: 05P0866B (FS-2575)··························································2-33
9. DRV board: 05P0866A(FS-5075) ··························································2-34
10. TX board: 05P0856 (FS-1575, FS-2575, FS-5075)································2-35
11. PA-IF board: 05P0864 (FS-2575, FS-5075)············································2-36
12. PA-IF board: 05P0864A (FS-1575)·························································2-37
13. RX-FIL board: 05P0862B (FS-1575, FS-2575)·······································2-38
14. RX-FIL board: 05P0862A (FS-5075) ······················································2-39
15. DUP-FIL board: 05P0863 (FS-5075)······················································2-40
16. RX board: 05P0842 (FS-1575, FS-2575, FS-5075)································2-41
17. WR1 board: 05P0847A (FS-1575, FS-2575, FS-5075) ··························2-42
18. WR2 board: 05P0847B (FS-1575, FS-2575, FS-5075)··························2-43
19. T-IF board: 05P0861 (FS-2575, FS-5075), 05P0861A (FS-1575) ··········2-44
20. MOT board: 05P0860 (FS-1575, FS-2575, FS-5075)·····························2-45
21. T-CPU board: 05P0859 (FS-1575, FS-2575, FS-5075)··························2-46
22. SW-REG board: 05P0873 (FS-2575, FS-5075)······································2-47
23. PWR board: 05P0874 (FS-1575, FS-2575, FS-5075)····························2-48
24. P-SW board: 05P0871 (FS-1575, FS-2575, FS-5075)···························2-49
25. FET board: 05P0872 (FS-5075)·····························································2-50
2.6 Antenna Coupler··························································································2-51
2.6.1 AT-5075·································································································2-51
2.6.2 AT-1575·································································································2-55
2.7 NBDP Terminal ····························································································2-59
2.7.1 IB-583····································································································2-59
1) TERM CPU (16P0209A)·········································································2-63
2) PWR board (16P0211A)·········································································2-64
3) SW board (16P0212)··············································································2-64
2.7.2 IB-585····································································································2-65

Contents
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CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
2.8 Handset: HS-2003 ·······················································································2-70
2.9 AC/DC Power Supply Unit···········································································2-71
2.9.1 PR-850A································································································2-71
2.9.2 PR-300··································································································2-72
Chapter 3. Menu Tree
3.1 Entering Service Menu···················································································3-1
3.2 Menu Tree······································································································3-2
Chapter 4. System setting
Introduction··········································································································4-1
1. Menus············································································································4-1
2. Special Operation···························································································4-2
4.1 MMSI Setting and CLEAR All·········································································4-3
4.1.1 MMSI Setting···························································································4-3
4.1.2 MMSI CLEAR··························································································4-4
4.1.3 CLEAR ALL·····························································································4-4
4.2 USER CH·······································································································4-5
4.2.1 Overview·································································································4-5
4.2.2 USER CH Window Operation··································································4-6
1. Registering USER CH [5]: ENTRY··························································4-6
2. Displaying a LIST of USER CH registered [6]: LIST································4-8
3. Deleting USER CH registered [4]: DELETE············································4-8
4. Editing USER CH registered·····································································4-9
5. Searching USER CH registered [7]: BAND·············································4-9
6. Reflecting channel selected on the RT window [8]: RT SET ···················4-9
4.3 SYSTEM······································································································4-10
4.3.1 [1. SQ FREQ] Default: 1000······························································4-11
4.3.2 [2. KEYASSIGN]···················································································4-12
4.3.3 [3. PRINT] ·····························································································4-13
4.3.4 [4. POSITION]·······················································································4-16
4.3.5 [5. DATE/TIME] ·····················································································4-18
4.3.6 [6. TIME OUT]·······················································································4-19

Contents
iv
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
4.3.7 [7. RX SETUP] ······················································································4-21
1. FAX RX (DISABLE, ENABLE) ································································4-21
2. ANT SELECT (RX ANT, TRX ANT)·························································4-22
3. CLARIFIER (ON, OFF)···········································································4-23
4.3.8 [8. EXTERNALALARM] ········································································4-24
4.3.9 [9. NETWORK]······················································································4-26
4.4 DSC·············································································································4-27
4.4.1 [1. ADDRESS BOOK]············································································4-28
1. Registering an address [5]: ENTRY ·····················································4-29
2. Displaying a list of addresses registered [6]: LIST ·······························4-30
3. Deleting address(s) registered [4]: DELETE········································4-31
4. Editing address registered [ENTER]: EDIT··········································4-31
5. Reflecting selected address on DSC COMPOSE MESSAGE window
[DSC MSG]: COMPOSE ·······································································4-32
4.4.2 [2. MSG FILE] ·······················································································4-33
1. Registering a DSC message [5]: ENTRY·············································4-34
2. Displaying a LIST of DSC messages registered [6]: LIST····················4-35
3. Deleting DSC message(s) registered [4]: DELETE······························4-35
4. Editing DSC message registered [ENTER]: DETAIL····························4-36
5. Reflecting selected message file on
DSC COMPOSE MESSAGE window [DSC MSG]: COMPOSE ··········4-36
4.4.3 [3. ACK SETTINGS]··············································································4-37
4.4.4 [4. SPECIAL MSG]················································································4-39
4.4.5 [5. ROUTINE SCAN]·············································································4-40
4.4.6 [6. DISTRESS SCAN] ···········································································4-41
4.5 AUDIO··········································································································4-43
4.5.1 [1. KEY CLICK]······················································································4-44
4.5.2 [2. OFF HOOK SP]················································································4-44
4.5.3 [3. ORDINARYALARM] ········································································4-45
4.5.4 [4. ALARM DISTANCE] ·········································································4-46
4.5.5 [5. SIDE TONE]·····················································································4-48
4.5.6 [6. SIDE TONE LV]················································································4-48
4.6 ALARM ········································································································4-48
4.7 SERVICE·····································································································4-49
4.7.1 [1. EQUIP TYPE]···················································································4-51
4.7.2 [2. DSC SETUP]····················································································4-51
1. MMSI······································································································4-51
2. SIG DETECT S- LEVEL (0 - 100) : 80····················································4-51
3. DISTRESS ALARM (0 - 31)····································································4-52
4. CLASS (MF, MF/HF, NON-GMDSS)·······················································4-53
5. DSC/DSE SENTENCE (ON, OFF) ·························································4-59
6. LAST DISTRESS LOG ···········································································4-60

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4.7.3 [3. RT SETUP]·······················································································4-61
1. TX FREQ (ALL FREE, FREE, MARINE/USER, ITU/USER, USER)·······4-61
2. AM MODE (RX ONLY, TX/RX)································································4-65
3. CW (ENABLE, DISABLE)·······································································4-66
4. LSB·········································································································4-66
5. SELCALL (ENABLE, DISABLE) ·····························································4-67
6. REF OSC (-127~+127): 0·······································································4-68
7. CLARIFIER LIMIT (50Hz~990Hz): +200Hz ············································4-68
8. TX TUNE (ON, OFF)···············································································4-69
9. COUPLER THROUGH (OFF, RCVD, DIFF)···········································4-70
10. RX ANT (CONNECT, DISCONNECT) ····················································4-71
11. DIVIDER·································································································4-79
12. LINE IN (-10/+10) 0················································································4-79
13. LINE OUT (-10/+10) 0 ············································································4-79
14. FORMAT (IEC+NMEA, IEC)···································································4-79
15. MIF (RS-232C, RS-485)·········································································4-80
4.7.4 [4. RESTORE FACTORY SETTINGS] ··················································4-82
4.7.5 [5. TEST]·······························································································4-82
4.7.6 [6. MAINTENANCE LOG]······································································4-82
4.7.7 [7. OTHER]····························································································4-83
1. PA (ON, OFF) ·························································································4-83
2. ALARM UNIT (CONNECT, DISCONNECT)············································4-83
3. P-BROWSER ·························································································4-86
4. SOFTWARE ERASE ··············································································4-86
5. DEBUG MODE (ON, OFF)·····································································4-86
4.8 Mounting of WR2 Board ················································································4-87
1. In case of FAX-5+2.5m antenna·····························································4-87
2. To share with T/R ANT············································································4-88
3. To share with RXANT (for DUPLEX communication)·····························4-89
4.9 WR1 and WR2 Board Jumper Setting···························································4-90
4.10 EXTERNALALM Output Setting (N.C, N.O)················································4-91
4.11 Mounting of DUP FIL Board·········································································4-92
4.12 AT-5075 Setting ···························································································4-93
4.13 AT-1575 Setting ···························································································4-95
4.14 IB-583 Setting······························································································4-97
4.14.1 List of Setting Menus···········································································4-97
4.14.2 Making Setting of Submenu
“6. Manual Reception” of“F3: Operate” Menu··········································4-98
4.14.3 Making setting of “F5: Station” Menu···················································4-98
4.14.4 Making Setting of “F6: System” Menu···············································4-101

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4.14.5 Making Printer and Language Setting···············································4-103
4.14.6 Switching between English and Russian Modes·······························4-103
4.14.7 Making Brightness Setting·································································4-104
4.14.8 Special Operation··············································································4-104
1. Tone Test ······························································································4-104
2. Checking detailed software version······················································4-105
4.14.9 List of IB-583 Menus ·········································································4-106
4.15 IB-585 Setting··························································································4-107
4.15.1 List of Setting Menus·········································································4-107
4.15.2 Making Setting of Submenu
“6. Manual Reception” of “F3: Operate” Menu·····································4-108
4.15.3 Making setting of “F5: Station” Menu·················································4-108
4.15.4 Making Setting of “F6: System” Menu···············································4-111
4.15.5 Switching between English and Russian Modes·······························4-114
4.15.6 [F11]: Setup Menu·············································································4-114
4.15.7 Making Brightness Setting·································································4-116
4.15.8 Removing SD Card ···········································································4-116
4.15.9 Special Operation··············································································4-117
1. Tone Test ······························································································4-117
2. Checking detailed software version······················································4-118
4.15.10 List of IB-585 Menus ·······································································4-119
4.16 AC/DC Power Unit Setting·········································································4-120
4.16.1 PR-850A····························································································4-120
4.16.2 PR-300······························································································4-121
Chapter 5. Adjustment and Measurement
5.1 Overview of Output Power Adjustment ··························································5-1
5.1.1 Overview·································································································5-1
5.1.2 Output Power Characteristics··································································5-4
1. FS-5075: Power data vs. RT Output Power··············································5-4
2. FS-5075: RT Output Power vs. PA Ic························································5-5
3. FS-2575: Power data vs. RT Output Power··············································5-6
4. FS-2575: RT Output Power vs. PA Ic························································5-7
5. FS-1575: Power data Vs RT Output Power··············································5-8
6. FS-1575: RT Output Power Vs PA Ic························································5-9
7. FS-2575: RT Output Power vs. MIC INPUT············································5-10
5.1.3 SSB Power Measurement·····································································5-11
1. Output power measurement by 2-tone signal·········································5-11
2. Output power measurement by 1-tone signal·········································5-12

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5.2 T/R Unit Output Power Adjustment and Measurement ································5-14
5.2.1 Preparation····························································································5-14
1. Connection ·····························································································5-14
2. Preparation for measurement·································································5-14
5.2.2 TX PWR (FREQ)···················································································5-15
5.2.3 TX PWR (USER CH)·············································································5-17
5.2.4 TX PWR (TUNE)···················································································5-20
5.2.5 TX PWR (SEL CALL) ············································································5-21
5.3 ATU Output Power·······················································································5-23
5.3.1 Connecting Dummy load to ATU···························································5-23
5.3.2 Connecting Antenna to ATU··································································5-24
5.3.3 Power Measurement by Calculating Efficiency ·····································5-25
5.4 Frequency Measurement and Adjustment···················································5-26
5.4.1 Transmission Frequency Measurement················································5-26
1. Connection point of frequency counter···················································5-26
2. Frequency measurement procedure·······················································5-27
5.4.2 Frequency Adjustment ··········································································5-29
5.5 DSC TEST···································································································5-31
5.6 TONE TEST·································································································5-32
5.7 Board Adjustment ························································································5-33
5.7.1 PA Board Adjustment (FS-1575, -2575, and -5075)······························5-33
1. PA Board: PA transistor BIAS adjustment (FS-1575, -2575, -5075) ·······5-35
2. PA Board: PA Vc check meter reading adjustment
(FS-1575, -2575, -5075)········································································5-36
3. PA Board: PA Ic reading adjustment (FS-1575, -2575, -5075)···············5-37
4. PA Board: DRIV transistor Q2-Q3 BIAS adjustment (FS-1575)··············5-39
5. PA Board: PRE-DRIV transistor Q1 BIAS adjustment (FS-1575)···········5-39
5.7.2 DRV BoardAdjustment (FS-2575, -5075) ·············································5-40
1. DRV Board: PA transistor (Q4-Q5) BIAS adjustment (FS-2575, -5075)··5-41
2. DRV Board: DRV transistor (Q2-Q3) BIAS adjustment
(FS-2575, -5075)···················································································5-44
3. DRV Board: PRE-DRV transistor (Q1) BIAS adjustment
(FS-2575, -5075)·····················································································5-45
5.7.3 TX Board Adjustment: 05P0856 (FS-1575, -2575, -5075)·····················5-46
1. 36 MHz REF OSC frequency offset adjustment: R143···························5-46
2. TX GAIN adjustment: R208 ····································································5-47
5.7.4 TX FIL Board Adjustment ······································································5-50
5.7.5 PA-IF Board Adjustment········································································5-53
5.7.6 COUP: 05P0875 (FS-2575 and FS-5075)·············································5-54

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5.8 Reception Testing························································································5-55
5.8.1 Reception Gain and S/N Ratio Measuring·············································5-55
1. J3E reception gain measuring································································5-55
2. J3E S/N 20dB measuring ·······································································5-55
3. J3E AGC measuring···············································································5-55
5.8.2 Measurement Circuits·············································································5-56
1. When not passing signal through DIVIDER circuit on RX FIL board·······5-56
2. When passing signal through DIVIDER circuit on RX FIL board·············5-57
5.8.3 Reception Specifications·········································································5-58
Chapter 6. Maintenance
6.1 [MENU] -> TEST····························································································6-1
6.1.1 DAILY TEST····························································································6-2
1. RX·············································································································6-3
2. DSC··········································································································6-3
3. WR1··········································································································6-3
4. WR2··········································································································6-4
5. ALARM UNIT: IC-350················································································6-5
6.1.2 TX SELF TEST························································································6-6
1. CODEC·····································································································6-9
2. TX PLL······································································································6-9
3. TX···········································································································6-10
4. DRV (FS-2575 and FS-5075) ·································································6-11
5. SW-REG 1 and SW-REG 2 (FS-2575 and FS-5075)······························6-11
6. PA (FS-1575, FS-2575, and FS-5075)····················································6-12
7. COMB (FS-5075)····················································································6-13
8. TX FIL (FS-1575, FS-2575, and FS-5075)··············································6-14
9. COUPLER (FS-1575, FS-2575, and FS-5075)·······································6-14
6.2 SERVICE: SELF CHECK·············································································6-15
1. VS [V] ·····································································································6-17
2. TX IF IN··································································································6-17
3. TX RF OUT·····························································································6-17
4. DRV VF ··································································································6-17
5. DRV VR··································································································6-17
6. DRV TEMP·····························································································6-17
7. UNBALANCE··························································································6-18
8. VC [V]·····································································································6-18
9. IC [A]·······································································································6-18
10. PA-VF·····································································································6-18
11. PA-VR·····································································································6-18
12. PA-TEMP································································································6-18
13. FILTER VR ·····························································································6-19
14. FILTER ALC····························································································6-19

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6.3 ALARM············································································································6-20
6.4 SERVICE: RESTORE FACTORY SETTINGS ·············································6-21
6.4.1 Types of Memory Clear Menus······························································6-21
6.4.2 Clear Procedure····················································································6-22
1. RESTORE FACTORY SETTINGS··························································6-22
2. CLEAR ALL ····························································································6-22
3. MMSI CLEAR ·························································································6-22
6.5 SERVICE: TEST··························································································6-23
6.5.1 VERSION······························································································6-23
1. Verifying Program Version······································································6-23
2. Verifying Board Version ··········································································6-27
3. Verification of model: Board INST signal ················································6-28
6.5.2 T-CPU PCB Test····················································································6-31
1. SOFT, CPLD, BOOT···············································································6-31
2. RAM, ROM·····························································································6-31
3. T-CPU, MOT, through DRV·····································································6-31
6.5.3 C-CPU PCB Test···················································································6-32
1. [PROGRAM VERSION]··········································································6-32
2. [TEST]: ROM, RAM················································································6-32
3. [TEST]: NBDP ························································································6-33
4. [PCB VERSION]·····················································································6-33
5. BACK LED······························································································6-34
6. ALARM LED (RED)·················································································6-34
7. OTHER LEDS·························································································6-34
8. PRINTER STATUS ·················································································6-34
9. ENCODER KNOB···················································································6-35
10. VOLUME KNOB·····················································································6-35
11. RF GAIN KNOB······················································································6-35
12. HOOK·····································································································6-35
13. PTT·········································································································6-35
14. KEY mark ·······························································································6-35
15. LCD TEST······························································································6-36
6.5.4 TATEST································································································6-37
1. AC FAIL ··································································································6-38
2. CW KEY ······························································································· 6-38
3. RX MUTE ·······························································································6-38
4. ALARM ACK ···························································································6-38
5. EXT PTT·································································································6-38
6. CONTINUOUS PRINT············································································6-38
7. DISTRESS SCAN···················································································6-39
8. POPUPALARM······················································································6-39
9. MIC LOOP BACK ···················································································6-39
10. IEC-61162 ······························································································6-39
11. ALARM UNIT··························································································6-39
12. REMOTE································································································6-40

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6.5.5 DISPLAY TEST ·····················································································6-40
1. DISTRESS KEY LED··············································································6-40
2. ALARM LED (RED)·················································································6-40
3. ALARM LED (YELLOW)·········································································6-40
4. PANEL KEY LED····················································································6-41
5. DISPLAY LCD·························································································6-41
6. LCD CURRENTADJ ··············································································6-41
7. [3]: NEXT································································································6-41
6.6 MAINTENANCE LOG··················································································6-42
6.6.1 I/O MONITOR························································································6-42
1. IEC-61162·······························································································6-42
2. ALARM UNIT··························································································6-42
3. REMOTE································································································6-42
6.6.2 ERROR LOG·························································································6-43
6.6.3 SOFTWARE UPDATE LOG ··································································6-44
6.6.4 POWER ON LOG··················································································6-45
6.6.5 INFORMATION LOG·············································································6-46
6.7 Erasing FS-2575C Software········································································6-47
6.8 LED Check···································································································6-50
6.8.1 LEDs for FS-xx75T Unit ········································································6-50
1. T-CPU Board (05P0859)·········································································6-50
2. MOT Board (05P0860) ···········································································6-51
6.8.2 LEDs for FS-xx75C Unit········································································6-52
6.8.3 LEDs for NBDP Terminal·······································································6-53
1. IB-583·····································································································6-53
2. IB-585·····································································································6-53
6.9 Checking Antenna Coupler··········································································6-54
6.9.1 Self-test·································································································6-54
1. Checking for matching circuit relays·······················································6-55
2. Checking ROM ·······················································································6-55
3. Checking RAM························································································6-55
4. Checking ADC ························································································6-55
6.9.2 Checking Antenna Coupler····································································6-56
1. Checking for running of CPU··································································6-56
2. Checking self-test···················································································6-56
3. Ensuring finish of cables and mounting of components··························6-56
4. Ensuring connection of coaxial cable······················································6-57
5. Ensuring mounting of copper grounding band and fastening of gland····6-57
6. Ensuring antenna connection·································································6-58
6.9.3 Troubleshooting for TUNE NG ······························································6-59

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6.10 Replacement of Boards ·············································································6-60
6.10.1 List of Boards ······················································································6-60
6.10.2 Precautions for Replacing Board·························································6-61
1. Replacing T-CPU board··········································································6-61
2. Replacing MOT board·············································································6-63
3. Replacing C-CPU board·········································································6-64
4. Replacing C-IF Board·············································································6-64
5. Replacing speaker··················································································6-65
6. Applying a coating of silicones compound··············································6-66
6.10.3 Actions to be taken after Replacing Boards·········································6-69
1. WR1 / WR2 boards: 05P0847A / 05P0847B
(FS-1575, -2575, and -5075)···································································6-69
2. TX board: 05P0856 (FS-1575, -2575, -5075) ·········································6-69
3. DRV board: 05P0866A, 05P0866B (FS-5075, -2575) ····························6-70
4. PA board: 05P0866A, 05P0866B, 05P0868 (FS-5075, -2575, -1575)····6-70
5. TX FIL board: 05P0870A, 05P0870B, 05P0876
(FS-5075, -2575, -1575)··········································································6-70
6. COMB board: 05P0869 (FS-5075) ·························································6-70
7. PA-IF board: 05P0864, 05P0864A (FS-5075/-2575, -1575) ···················6-70
8. RX board: 05P0842 (FS-5075, -2575, -1575)·········································6-70
9. DUP-FIL board: 05P0863 (FS-5075) ······················································6-70
10. RX FIL board: 05P0862A, 05P0862B (FS-5075, -2575/-1575)···············6-71
11. MOT board: 05P0860 (FS-5075, -2575, -1575)······································6-71
12. T-CPU board: 05P0859 (FS-5075, -2575, -1575)···································6-71
13. T-IF board: 05P0861, 05P0861A (FS-5075/-2575, -1575)······················6-72
14. C-CPU board: 05P0852··········································································6-72
15. PANEL board: 05P0844··········································································6-73
16. C-IF board: 05P0853··············································································6-73
17. FET board: 05P0872··············································································6-73
18. P-SW board: 05P0871············································································6-73
19. PWR board: 05P0874·············································································6-73
20. SW REG board: 05P0873 ······································································6-73
21. COUP board: 05P0875 (AT-5075), 05P0883 (AT-1575)·························6-73
6.11 Level Check·································································································6-74
1. TX board: 05P0856 ··················································································6-74
2. DRV board: 05P0866A, B (FS-5075, -2575) ············································6-75
3. PA board: 05P0867A, B (FS-2575, -5075)················································6-78
4. PA board: 05P0868 (FS-1575)··································································6-81
5. COMB board: 05P0869 (FS-5075)···························································6-83
6. TX FIL board: (FS-1575, -2575, -5075) ····················································6-84

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Chapter 7. Block Description
7.1 System Configuration ······················································································7-1
7.1.1 Unit Configuration ·····················································································7-1
7.1.2 Unit Configuration ·····················································································7-2
1. Configuration of FS-5075T·········································································7-2
2. Configuration of FS-2575T·········································································7-3
3. Configuration of FS-1575T·········································································7-4
4. Configuration of FS-2575C·········································································7-5
7.1.3 Major Functions of Boards········································································7-6
1. Transceiver unit: FS-xx75T ········································································7-6
2. Control unit: FS-2575C···············································································7-8
3. Antenna coupler ·························································································7-8
7.2 Transmission Circuit ························································································7-9
7.2.1 TX Board (05P0856): Common Board······················································7-9
1. 36kHz TX IF signal···················································································7-10
2. 36MHz VCTCXO······················································································7-11
3. Synthesizer circuit ····················································································7-11
4. TX output power control circuit·································································7-12
5. TX board self-test detection circuit ···························································7-18
7.2.2 DRV Board······························································································7-19
1. Protection circuit·······················································································7-21
2. IMD improvement·····················································································7-21
3. Bias adjustment························································································7-21
7.2.3 PA Board-1······························································································7-22
1. Bias adjustment························································································7-24
2. VC reading adjustment·············································································7-24
3. IC reading adjustment ··············································································7-24
4. TEMP PA··································································································7-24
7.2.4 PA Board-2 (05P0868): FS-1575·····························································7-25
1. Protection circuit·······················································································7-26
2. IMD improvement·····················································································7-27
3. Bias adjustment························································································7-27
4. VC reading adjustment·············································································7-27
5. IC reading adjustment ··············································································7-27
7.2.5 COMB Board (05P0869): FS-5075T·······················································7-28
7.2.6 TX FIL Board···························································································7-29
1. LPF circuit ································································································7-30
2. K17: 50-ohm BK relay circuit····································································7-31
3. R44: 50-ohm dummy load circuit······························································7-31
4. SWR detection circuit···············································································7-31
7.2.7 PA-IF Board·····························································································7-33
1. VS detection·····························································································7-35
2. Verification of model·················································································7-35
3. PROTECT signal (FS-2575 and FS-5075)···············································7-36

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7.3 Receiver Circuit·····························································································7-37
7.3.1 RX FIL Board ··························································································7-37
1. Receiving filters of RX FIL board······························································7-38
2. Pre-selector······························································································7-39
3. RX DIV ·····································································································7-40
7.3.2 DUP FIL Board (05P0836): FS-5075·······················································7-42
7.3.3 RX Board (05P0842): Common Board····················································7-45
1. 36 kHz IF RX signal··················································································7-46
2. IF AGC······································································································7-47
3. RX ATT·····································································································7-47
4. PLL Synthesizer circuit·············································································7-48
5. RX board self-test detection circuit···························································7-48
7.4 WR Board······································································································7-50
1. Differences between WR1 and WR2 boards············································7-51
2. IF WR·······································································································7-52
3. IF AGC ·····································································································7-52
4. PLL Synthesizer circuit·············································································7-53
5. WR board self-test detection circuit··························································7-53
6. Power supply for pre-amplifier··································································7-53
7.5 Interface·········································································································7-54
7.5.1 T-IF Board·······························································································7-54
7.5.2 MOT Board (05P0860) for Shared Use···················································7-55
7.6 T-CPU············································································································7-56
7.6.1 Signal Route ···························································································7-57
1.1 Overview of transmitted voice signal route·············································7-59
1.2 Received voice signal route····································································7-59
2.1 Transmitted NBDP signal route ······························································7-60
2.2 Received NBDP signal route··································································7-60
3.1 Transmitted DSC signal route·································································7-61
3.2 Received DSC (WR1) signal route·························································7-61
3.3 Received DSC (WR2) signal route·························································7-62
7.6.2 Voice Signal Processing··········································································7-63
1. SQ (Squelch)····························································································7-63
2. NB (Noise Blanker)···················································································7-63
3. NR1 and NR2 (Noise Reduction) ·····························································7-64
4. NF (Notch Filter)·······················································································7-64
7.6.3 Memory···································································································7-65
7.6.4 High-speed Serial Communication··························································7-66
7.7 Power Supply ································································································7-67
7.7.1 Power Supply Specifications···································································7-67
1. POWER (05P0874): Common··································································7-67
2. P-SW (05P0871): Common······································································7-67
3. SW REG （05P0873)：FS-2575 and FS-5075·········································7-67

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4. FET (05P0872): FS-5075 ·········································································7-68
7.7.2 Power Supply Circuit Diagram································································7-68
1. FS-5075 Power supply circuit diagram·····················································7-68
2. FS-2575 Power supply circuit diagram·····················································7-69
3. FS-1575 Power supply circuit diagram·····················································7-69
7.8 Control Unit: FS-2575C ·················································································7-70
1. C-CPU board: 05P0852············································································7-71
2. C-IF board: 05P0853················································································7-71
3. PANEL board: 05P0844············································································7-71
4. Set items saved in the control unit····························································7-71
7.9 Antenna Coupler····························································································7-72
7.9.1 FS-2575 and FS-5075:
AT-5075(05P0875) / FS-1575: AT-1575(05P0883)·····································7-72
1. Control signal timing·················································································7-73
2. Matching circuit ························································································7-73
3. Overview of matching procedure······························································7-75
4. Self-test····································································································7-76
5. Monitoring matching status·······································································7-77
7.9.2 Calculation of Matching Circuit································································7-92
1. Gamma matching·····················································································7-92
2. Pi-matching ······························································································7-94
7.10 NBDP Terminal····························································································7-95
7.10.1 IB-585 ···································································································7-95
1. TERMCPU (16P0283A)············································································7-95
2. TERMPWR (16P0287A)···········································································7-97
7.10.2 IB-583·····································································································7-98
1. TERMCPU (16P0209A)············································································7-99
2. PWR (16P0211A)···················································································7-100
Chapter 8. Updating Program
8.1 FS-xx75 Updating Program·············································································8-1
8.1.1 Summary for Update·················································································8-1
8.1.2 List of Program files ··················································································8-2
8.1.3 Verifying Program Version·········································································8-3
8.1.4 Program Updating Procedure ···································································8-5
8.1.5 When program version is different between T-CPU and C-CPU·············8-12
8.2 NBDP Terminal Updating Program································································8-13
8.2.1 IB-583 Updating Program ·······································································8-13
1. Verifying IB-583 program version ·····························································8-13
2. IB-583 updating program··········································································8-14

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8.2.2 IB-585 Updating Program ·······································································8-16
1. Verifying IB-585 program version ·····························································8-16
2. IB-585 updating program··········································································8-17
Additional information: Updating Program via Serial Port····································8-21
Chapter 9. Q&A
Q1. Required antenna? ·······················································································9-1
Q2. How to verify software version?····································································9-1
Q3. How to update program for the FS-2575C?··················································9-1
Q4. Do I need to take any measures when program is updated?························9-1
Q5. When initiating a program update, an error message saying
“--error (UDP_snd_dat)” is displayed. How to deal with this error?···········9-1
Q6. When initiating a program update, an error message saying
“Communication error!” is displayed.·························································9-1
Q7. Can I use any control unit? ···········································································9-1
Q8. How to register MMSI?··················································································9-1
Q9. How to enter SERVICE menu?·····································································9-2
Q10. Is there any board available for use in both the FS-xx70 and FS-xx75?·····9-2
Q11. I would like to know the power supply specification of PR-850A.················9-2
Q12. I would like to know the power supply specification of PR-300.··················9-2
Q13. I would like to know the specification of BC-6158. ······································9-2
Q14. Is the FS-2575 system available for Duplex communications?···················9-2
Q15. When turning OFF the power, is the T/R antenna grounded?·····················9-2
Q16. Does the system support telegraphy?·························································9-2
Q17. Can I operate the system only with the radiotelephone function?···············9-2
Q18. Are alarms outputted with the output contact set to “N.C” or “N.O?”···········9-3
Q19. Is it possible to turn ON the speaker even
with the Handset set to “OFF HOOK?”······················································9-3
Q20. Is the parameter browser of the FS-2570 system available for use?
Is it possible to make MMSI setting from the parameter browser?············9-3
Q21. Is the system provided with the Main Fail (Power Fail) function?················9-3
Q22. Where to connect a telegraph key?·····························································9-3
Q23. Is it possible to connect a SELCALL (Selective Calling) System? ··············9-4
Q24. I would like to know the ALC adjustment method.·······································9-4
Q25. I would like to know how to make frequency adjustment.····························9-4
Q26. What is allowable deviation of NBDP and DSC frequencies?
Up to how much deviation can messages be decoded?···························9-4
Q27. How to verify the model of a system? ·························································9-4
Q28. Using the RX antenna resulted in reduced receiver sensitivity.
What is the cause of this problem?···························································9-4
Q29. What do the figures shown in red on the SELF CHECK window mean?·····9-4
Q30. Which of the GNSS and Manual modes is given priority to enter data?······9-5

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Q31. No positional data is displayed.···································································9-5
Q32. Can I change IP address of System?··························································9-5
Q33. I would like to know the sequence to voice signal
between the Control unit and the Transceiver unit.···································9-5
Q34. Is it possible to turn ON the power from No. 2 control unit?························9-5
Q35. Is there any method available to monitor the matching status ofATU?·······9-5
Q36. I would like to know the size of a cable used to connect
between the Transceiver unit and the power supply unit. ·························9-6
Q37. I would like to know the size of a cable used to connect
between the battery and the battery charger.············································9-6
Q38. I would like to know precautions
for using a copper band for grounding ATU.·············································9-6
Q39. How much collector current passes through PA at the rated output? ·········9-6
Q40. TX output power has dropped just in 8M.
Which board has a trouble that resulted in the drop in output power? ······9-7
Q41. During the adjustment of TX output power, the system stopped
outputting power and displayed an error message saying
“Communication error!.” ··········································································9-7
Q42. During checking for TX power output, the power supply turned OFF
and the system started with a message saying “Initializing…” again.······9-7
Q43. TUNE NG occurred. I would like to know the procedure
for taking measures against the TUNE NG problem. ······························9-7
Q44. Is transmission enabled even when TUNE NG occurs?······························9-8
Q45. What is the rated input signal level of the Handset? ···································9-8
Q46. Power supply turned ON, but the window remained blacked out.···············9-8
Q47. When turning ON the power, a message saying
“Initializing…” remains displayed. I would like to know the causes. ··········9-8
Q48. I would like to know whether No.2 Control unit is available to perform
NBDP communication.············································································9-8
Q49. I would like to know conditions for DSC AUTO ACK. ··································9-8
Q50. Is there any method for monitoring the ringtones of DSC messages?········9-8
Q51. Is there any method for stopping DISTRESS SCAN mode?·······················9-9
Q52. Is it possible to stop ROUTINE SCAN mode?·············································9-9
Q53. Is it possible to check whether or not a Distress alert was transmitted? ·····9-9
Q54. The Distress alarm did not sound as soon as
a Distress alert was received. Is this normal?·············································9-9
Q55. I would like to know how to cancel Distress alert.·······································9-9
Q56. AUTO, MULTI, and SINGLE modes are available
to transmit a Distress alert. What is the difference?····································9-9
Q57. What happens if I accidentally transmitted a Distress alert
and turned OFF the power supply on the way? ········································9-10
Q58. Is protection circuit built in the system?·····················································9-10
Q59. I would like to know how to measure tone frequency.·······························9-10
Q60. Are front and rear handsets the same in the MIC gain?····························9-10

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Q61. What is the cause of low receiver sensitivity on a specific band?·············9-10
Q62. Is there any limit put on the capacity of SD card of
the IB-585 terminal unit?·········································································9-11
Q63. No Norwegian characters and “ ￡ ” are printed out with the IB-585.··········9-11
Q64. I implemented the Screen Print menu of the IB-585,
but could not print the screen as shown.···················································9-11
Q65. No five-digit ID has been given with NBDP.
Is it possible to communicate with a coast station having four-digit ID?····9-11
Q66. Does the PP-510 printer include the self-test function? ····························9-11
Q67. Is any battery used in the system?····························································9-11
Q68. I would like to know the procedure for making DSC test calls.··················9-12
Q69. I would like to know the procedure for conducting Test calls with NBDP.·9-12
Q70. I would like to know DSC frequencies.······················································9-14
Appendix 1. Parameter Browser
Summary ········································································································AP1-1
AP1.1 Installation····························································································AP1-2
AP1.1.1 installation······················································································AP1-2
AP1.2 Booting General Menu Manager··························································AP1-3
AP1.3 Display ·································································································AP1-7
AP1.3.1 Display···························································································AP1-7
1. Menu tree display window ···································································AP1-8
2. Main window························································································AP1-9
3. Parameter information·······································································AP1-10
AP1.3.2 Menu Tree ···················································································AP1-11
AP1.4 Operation ···························································································AP1-13
AP1.4.1 RELOAD······················································································AP1-14
AP1.4.2 Save As·······················································································AP1-14
AP1.4.3 Upload·························································································AP1-15
AP1.4.4 Local Mode··················································································AP1-16
AP1.4.5 Uploading XML File to FS-xx75···················································AP1-17
AP1.5 Other Operations················································································AP1-18
AP1.5.1 Printing out data displayed ··························································AP1-18
AP1.5.2 Saving All Parameters in CSV File Format··································AP1-19
AP1.5.3 Registering Name········································································AP1-20
AP1.5.4 Making MMSI Setting ··································································AP1-21
AP1.5.5 Executing CLEAR ALL·································································AP1-23
AP1.5.6 Conducting DAILY TEST, SELF-TEST, and SELF-CHECK ·········AP1-24
AP1.5.7 Making AUTO RELOAD Setting ··················································AP1-25
AP1.5.8 Verifying Version of General Menu Manager·······························AP1-25

Contents
xviii
CONFIDENTIAL (internal use only)
This confidential document is used only by FURUNO authorized persons.
It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
Appendix 2. Message List
AP2.1 Messages related to DSC Call·····························································AP2-1
AP2.2 Messages related to Setting Errors······················································AP2-5
AP2.3 Messages related to Hardware Errors··················································AP2-6
AP2.4 Status Messages··················································································AP2-8
Appendix 3. Specifications
1. MF/HF DIGITAL RADIOTELEPHONE ························································AP3-1
2. DSC/WATCH KEEPING RECEIVER ··························································AP3-2
3. NBDP FUNCTION (OPTION) ·····································································AP3-2
4. DISPLAY UNIT····························································································AP3-2
5. ANTENNA COUPLER: AT-1575, AT-5075···················································AP3-3
6. TERMINAL UNIT (OPTION) ·······································································AP3-3
7. INTERFACE································································································AP3-3
8. POWER SUPPLY ·······················································································AP3-3
9. ENVIRONMENTAL CONDITION ································································AP3-4
10. COATING COLOR····················································································AP3-4
Appendix 4. Test Data
FS-1575··········································································································AP4-2
FS-2575··········································································································AP4-4
FS-5075··········································································································AP4-6
Electrical Parts List
FS-1575T············································································································E-1
FS-2575T············································································································E-2
FS-5075T············································································································E-3
FS-2575C ···········································································································E-4
AT-1575 ··············································································································E-5
AT-5075 ··············································································································E-6
IB-583·················································································································E-7
IB-585·················································································································E-8
Contents of Drawings······································································S0-1