Furuno FCV-1200L User manual

COLOR LCD SOUNDER
FCV-1200L/1200LM
Back

C
9-52, Ashihara-cho,
Nishinomiya, Japan
Telephone: [phone]
Telefax: 0798-65-4200
Your Local Agent/Dealer
All ri
g
hts reserved.
PUB. No. SME-23650-A
FCV-1200L/LM
(
MAYA
)
FIRST EDITION : FEB 2001
Printed in Japan

CONTENTS
1. SYSTEM CONFIGURATION....................................................................1
1.1 Standard Type (FCV-1200L).........................................................................1
1.2 Black Box Type.............................................................................................2
1.3 Monitor Type (FCV-1200LM).........................................................................3
1.4 Connecting external transceiver unit (ETR) to EXIF Unit...............................4
1.5 Connecting external monitor unit to EXIF Unit...............................................4
2. SIGNAL FLOW.........................................................................................5
3. FUNCTION OF EACH UNIT.....................................................................8
3.1 Display Unit (MU-101C) ..............................................................................8
3.2 Control Unit (CV-1201/1202) .......................................................................9
3.3 Processor Unit..............................................................................................9
4. TEST POINT, LED and ADJUSTER.......................................................17
4.1 DISP Board (06P0238) .............................................................................17
4.2 Power Board (02P6270) ............................................................................18
4.3 ES Board (02P6271) .................................................................................20
4.4 MAIN Board (02P6269) .............................................................................23
4.5 EXIF Unit....................................................................................................25
4.6 Interface Unit..............................................................................................28
5. WAVEFORM...........................................................................................30
5.1 MAIN Board 02P6270.................................................................................30
5.2 POWER BOARD ........................................................................................34
5.3 ES Board (02P6271) .................................................................................35
6. TRANSDUCER DATA SETTING ............................................................36
7. TESTING TRANSDUCER ......................................................................38
7.1 Checking transducer with multimeter..........................................................38
7.2 Checking impedance at resonant poit.........................................................38
7.3 Checking resonant frequency characteristic................................................39
7.4 Resonant waveforms of normal transducers...............................................42
8. UPDATEING SOFTWARE......................................................................49
9. CONNECTING EXT. VGA MONITOR.....................................................50
MECANICAL PARTS LIST & EXPLODED VIEW......................................D-1
ELECTRICAL PARTS LIST ......................................................................E-1
SCHEMATIC DIAGRAM...........................................................................S-1

1
1. SYSTEM CONFIGURATION
1.1 Standard Type (FCV-1200L)
The standard type of the FCV-1200L consists of a Monitor Unit, Processor Unit and transducers, as
shown in figure 1.1.
Figure 1.1 Standard type
Ship's Mains
12-24 VDC
Rectifier
RU-1746B-2
100/110/115/200/
220/230 VAC
1φ, 50/60 Hz
PROCESSOR UNIT
CV-1203 (FCV-1200L)
CV-1203M (FCV-1200LM)
Navigator *4
HI
LO
: Option
: Standard
: Local Supply
*1: FCV-1200L only
*2: EXIF Assy. required for FCV-1200L.
*3: For sister ship one unit only
Sister ship: EXIF Assy. required for FCV-1200L
Master ship: FCV-1200LM or FCV-1200L equipped with EXIF Assy.
*4: Navigator may be connected to interface unit or monitor unit.
CONTROL UNIT
CV-1201: Landscape type
CV-1202: Portrait type
High
Frequency Low
Frequency
Transducer*1 Transducer*1
Water Temp. Sensor
(T-02MSB, etc.)
Net Sonde
FNZ-18
Interface Unit
IF-8000
External Monitor
E/S Interface
VI-1100A
E/S Interface
VI-1100A Sonar, Net Recorder,
Telesounder TS-50/80 *3
OR
Transceiver Unit ETR-5D/10D
Telesounder TS-7000/8000 *3
Same as above
OR
SwitchBox
EX-7 Picture Recorder
MT-12
E/S Interface VI-1100A
OR
Transmitter Unit ETR-5D/10D
Same as above
Same as above
Same as above *2
Same as above
NMEA 0183
MONITOR UNIT MU-101C
External Monitor
Interface Unit
IF-8000
Navigator *4
CN7
CN8

2
1.2 Black Box Type
The black box type of the FCV-1200L consists of a Interface Unit (IF-8000), a Control Unit (CV-
1201 or CV-1202) and a Processor Unit, as shown in figure 1.2. The monitor unit must be VGA
type or VGA compatible type supplied in local. And it is connected to the Interface Unit IF-8000.
The standard monitor unit MU-101C also can be connected to the IF-8000.
The control unit CV-1201/CV1202 and external NAVAID are connected to the IF-8000.
Note; When external monitor is used, brightness of the display must be
controlled on the monitor.
Figure 1.2 Black box type
CN7
CN8
Ship's Mains
12-24 VDC
Rectifier
RU-1746B-2
100/110/115/200/
220/230 VAC
1φ, 50/60 Hzz
PROCESSOR UNIT
CV-1203 (FCV-1200L)
CV-1203M (FCV-1200LM)
Navigator
HI
LO
: Option
: Standard
: Local Supply
*1: FCV-1200L only
*2: EXIF Assy. required for FCV-1200L.
*3: For sister ship one unit only
Sister ship: EXIF Assy. required for FCV-1200L
Master ship: FCV-1200LM or FCV-1200L equipped with EXIF Assy.
*4: When connecting optional monitor unit, connect it to control unit.
CONTROL UNIT
CV-1201: Portrait type
CV-1202: Landscape type
MONITOR UNIT
MU-101C
NMEA 0183
Interface Unit
IF-8000
External Monitor
High
Frequency Low
Frequency
Transducer*1 Transducer*1
Water Temp. Sensor
(T-02MSB, etc.)
Net Sonde
FNZ-18
Interface Unit
IF-8000
External Monitor
E/S Interface
VI-1100A
E/S Interface
VI-1100A Sonar, Net Recorder,
Telesounder TS-50/80 *3
OR
Transceiver Unit ETR-5D/10D
Telesounder TS-7000/8000 *3
Same as above
OR
SwitchBox
EX-7
Picture Recorder
MT-12
E/S Interface VI-1100A
OR
Transmitter Unit ETR-5D/10D
Same as above
Same as above
Same as above *2
Same as above
*4

3
1.3 Monitor Type (FCV-1200LM)
The monitor type (FCV-1200LM) consists of the Monitor Unit (MU-101C) and the Processor Unit,
as shown in figure 1.3.
A External interface EXIF unit is equipped instead of a internal transceiver unit (ES board
"02P6271") in the Processor Unit for the monitor type (FCV-1200LM).
Figure 1.3 Monitor type
Ship's Mains
12-24 VDC
Rectifier
RU-1746B-2
100-230 VAC
1φ, 50/60 Hz
PROCESSOR UNIT
CV-1203M
*1: FCV-1200L onlyL.
*2: For sister ship one unit only
Sister ship: EXIF Assy. required for FCV-1200L
Master ship: FCV-1200LM or FCV-1200L equipped with EXIF Assy.
3: Navigator may be connected to either monitor unit or interface unit.
*4: Cable for monitor unit, control unit
Unibody - MJ-A10SPF0002-0015
Separate - MJ-A10SPF0002-0050
E/S Interface
VI-1100A
HI
LO
E/S Interface
VI-1100A Sonar, Net Recorder,
Telesounder TS-50/80 *3
OR
Transmitter Unit ETR-5D/10D
Telesounder TS-7000/8000 *3
Same as above
OR
SwitchBox
EX-7
Picture Recorder
MT-12
E/S Interface VI-1100A
OR
Transmitter Unit ETR-5D/10D
Same as above
Same as above
Same as above
Same as above
: Option
: Standard
: Local Supply
Water Temp. Sensor
(T-02MSB, etc.)
Net Sonde
FNZ-18
Interface Unit
IF-8000
External Monitor
External Monitor
Interface Unit
IF-8000
TEMP
SONDE
Navigator *3
NMEA 0183
Navigator *3
CONTROL UNIT
(Portrait type: CV-1201
Landscape type: CV-1202)
MONITOR UNIT MU-101C
*4

4
1.4 Connecting external transceiver unit (ETR) to EXIF Unit
• When external transceiver units (ETR) are connected together with the internal transceiver unit,
set the XDCR CONNECT menu in E/S DRAFT SETTING menu as follows;
1) To display internal "H" and "L" signals in dual display mode
Select INTERNAL for both high and low frequencies.
2)To display external "H" and "L" signals on dual display mode
Select EXTERNAL for both high and low frequencies.
3)To display internal "H" and external "L" signals on dual display mode.
Select INTERNAL for the high frequency and EXTERNAL for low frequency.
4)To display external "H" and internal "L" signals on the dual display mode
Select EXTERNAL for the high frequency and INTERNAL for low frequency.
5)To display three division screen, internal "H", internal "L", and either external "H" or
"L" on USER-1/2 mode.
Select INTERNAL for both high and low frequency, and connect external transceiver unit
(ETR) to connector CN7.
1.5 Connecting external monitor unit to EXIF Unit
Echo signals of the internal transceiver unit are always outputted from the connectors CN7 and CN8
regardless of the E/S SIG OUT setting in the E/S DRAFT SETTING menu.
The E/S SIG OUT setting determines whether the trigger (KP) from either connector CN7 or CN8
outputs or not.
1) When external monitor unit is connected to either connector CN7 or CN8,
• Select HF for the E/S SIG OUT setting, if external monitor is connected to CN7.
• Select LF for the E/S SIG OUT setting, if external monitor is connected to CN8.
2) When external monitor unit is connected to both connectors CN7 and CN8, select "LF/HF"
for E/S SIG OUT.

5
2. SIGNAL FLOW
The function of FCV-1200L is mainly controlled by the CPU on the MAIN board in the Processor
Unit. The key settings on the Control Panel are read by the CPU on the PNL board and send to the
CPU on the MAIN board via the data communication line. Major I/O signals between the MAIN
board and the ES board are transmission signal, received signal and control signals.
The echo signal is sent from the ES board to the MAIN board and then converted into R/G/B signals,
and then delivered to the DISP board in the Monitor Unit "MU101C" together with HS, VS and YC
signals. When interface unit "IF-8000" is connected, those signals are sent via the MIF board in the
IF-8000 to the external VGA monitor or standard LCD monitor "MU-101C".
The EXIF unit interfaces the signals between external unit ( ETR, TS, VI-1100, EX-7, MT-12) and
the MAIN board.
TX H
TX L
RX H
RX L
Key
PNL 02P6275 or
02P6276
FIL
02P6274
Ship's
Main
Inverter
Board
LCD
Unit
R/G/B
HS/VS
YC
TRXTD
CONTD
PSW
TD/RD
POWER
02P6270
NMEA
DISP
06P0238
VTX H
VTH L
KPTX H
KPTX L
TRX SIG H
TRX SIG L
TRX TVG H
LOCAL 1 H
LOCAL 2 H
TRX TVG L
LOCAL 1 L
LOCAL 2 L
PD H/L
VTX CONT H/L
VTX H
VTX L
5VA
12VP
12VPD
EXIF
EXIF 2
02P6279 EXIF 1
02P6278
PROCESSOR UNIT
CONTROL UNIT
MONITOR UNIT
NAVAID
+/- 5 V
12 VP
EXTXD/RXD
KPO L
EKP I L
KPO H
EKP I H
ES SIG
ETR SIG
SIG IN
SIG OUT
KP IN H
KP OUT H
KP IN L
KP OUT L
TVG/GAIN
ES
02P6271
MAIN
02P6269
TRX ST1 H
TRX ST2 H
TRX ST1 L
TRX ST2 L
EXIF ST
+/- 5V
Figure 2.1 Signal flow diagram; Standard Type

6
Figure 2.2 Signal flow diagram; Black Box & Monitor Type
Details of each signal shown in figures 2.1 and 2.2
Note; H: high frequency L: low frequency
Name Function
VTX H/L Supply voltage for TX power amplifier (+B voltage)
KP TX H/L Pulsed carrier signals for transmission
TRX SIG H/L Echo signals (output from ES board)
TRX TVG H/L TVG and Gain control voltage for receiver amplifiers
LOCAL 1 H/L First local carrier signals
LOCAL 2 H/L Second local carrier signals
VTX CONT H/L Controls VTX H/L voltage
PD H/L Reduces transmission power
TRX ST 1 Status signal of frequency; 15 - 200 kHz or 400 kHz.
TRX ST 2 Status signal of the ES board connection
EXIF ST Status signal of the EXIF unit connection
ETR SIG Echo signal output (8 bit binary code) from EXIF unit to MAIN board
ES SIG Echo signal from internal transceiver unit to EXIF unit
EKPI H/L Trigger signal inputted from external transceiver unit
KPO H/L Trigger output for external transceiver unit
EXTXD/RXD CPU data communication line between EXIF 1 and MAIN board

7
SIG IN AC Input signal (AC) from external transceiver unit
SIG IN DC Input signal (DC) from external transceiver unit
KP IN H/L Trigger signal inputted from external transceiver unit
KP OUT H/L Trigger signal output for external transceiver unit
TVG/GAIN TVG and GAIN control voltage for external transceiver unit
TD/RD Communication I/O signals to/from NAVAID
TRX TD Transmission data of CPU on MAIN board
CONTD Transmission data of CPU on PNL board
R/G/B Display signal (Red, Green, Blue)

8
3. FUNCTION OF EACH UNIT
3.1 Display Unit (MU-101C)
The Display Unit (MU-100) consists of DISP board (06P0238), LCD Inverter board, and LCD Unit.
Figure 3.1 shows the system block diagram of the Display Unit.
Figure 3.1 System block diagram of Display Unit
The DISP board contains LCD interface circuit and switching regulator circuit. The LCD interface
circuit converts the analogue R, G, B signals from the Transceiver Unit into six-bit digital R, G, B
signals and outputs them to the LCD unit.
H-SYNC, V-SYNC, and CLK (dot clock) signals generated by the Transceiver Unit are also sent to
the LCD Unit by the DISP board through the LCD Interface circuit.
The switching regulator of power circuit generates 5V and AD5V for internal digital circuit, and
12V for the LCD inverter board.
The LCD unit consists of LCD module (10.4-inch screen, TTF color LCD), LCD control board, and
fluorescent lamp for back-lighting.
The LCD inverter board generates AC pulse signal (high voltage) for the fluorescent lamp and it's
pulse length is controlled by the YC signal to control the LCD brightness.
LCD I/F
H-SYNC, V-SYNC, CLK
LCD Unit
5V
A/D CON.
AD5V
Switching Regulator
FUSE
F1 3A
12VDC
(10 to 16VDC)
Inverter
R, G, B,
BRILL
R, G, B,
HSN, VSN, CLK
12V
5V LCD
TRXTD-A/B, CONTD-A/B, PWRSW-H/C
DISP 06P0238
CN-2 CN-3
NMEA
Transceiver
Unit
CN-1
Control Unit
YC

9
3.2 Control Unit (CV-1201/1202)
Figure 2.2 shows the system block diagram of the Control Unit.
Figure 3.2 System block diagram of Control Unit
The control unit consists of the key panel and the PNL board. There two types of the PNL boards;
02P6275 for the portrait type and 02P6276 for the landscape type. The settings on the panel are
detected by the CPU on the PNL board and sent to the CPU on the MAIN board in the transceiver
unit through the serial data communication line.
3.3 Processor Unit
Figure 3.3 shows the system diagram of the Processor Unit.
Figure 3.3 System diagram of Processor Unit
02P6275 or 02P6276
FIL
02P6274 POWER
02P6270
ES
02P6271
CON
02P6262
EXIF
02P6278
02P6279
MAIN
02P6269
FAN
FAN
Ship's Main
12 -24VDC CN2
Transducer 1
Transducer 2
CN3
CN4
CN5
CN6
CN7
CN8
CN1
To Display Unit
WaterTemp. Sensor
Net Sonde
VI-1100
EX-7
ETR-5/10D
Telesounder
etc.
PROCESSOR UNIT

10
The processor unit consists of the MAIN board (02P6269), ES board (02P6271), POWER board
(02P6270), FIL board (02P6274), CON board (02P6262), and EXIF board (02P6279).
The EXIF board is optional supplied.
Following table shows the principal functions of each PC board.
PC board Functions
MAIN board
02P6269 Communicates with CPU on PNL board in Control Unit. Generates character data.
Generates transmission signals.
Processes received signal.
Generates R/G/B, H-SYNC, V -SYNC, and YC signals.
Inputs and outputs NMEA data.
Generates TVG curves and local carrier signals for receiver circuit
Controls VTX voltage on POWER board.
Detects status signals set on ES and EXIF boards.
ES board
02P6271 Transmits and receives signal from/to transducer.
POWER board
02P6270 Generates -5V, 5V, 5VA, 12VA, 12VPD, VTX L and VTX H by switching regulator circuit.
FIL board
02P6274 Eliminates common mode noise on ship's main line
CON board
02P6262 I/O board for Net Sonde and Water Temperature Sensor
EXIF board
02P6278
02P6269
Interfaces signals between external unit and processor unit
3.3.1 PWR Board (02P6270)
Figure 3.4 shows the block diagram of the PWR board.
The power circuit is activated when the PSW-H and PSW-L signals are short-circuited by the power
switch in the control unit. The PWR board generates 5V, -5V, 12VP, 12VPD, and VTX voltage.
The 12VPD is source voltage of the Display Unit. The VTX voltage is supplied to the transmission
amplifier circuit on the ES board (02P6262). The VTX voltage is determined by the VTX CONT
H/L signals which are generated on the MAIN board in accordance with the manual or auto-setting
of the "SUPPLY VOLT" in the "XDCR SETTING" menu.

11
Figure 3.4 Block diagram of PWR board (02P6270)

12
3.3.2 ES Board 02P6271
Figure 3.5 shows the block diagram of the ES board.
Figure 3.5 Block diagram of ES board
The transmitting and receiving amplifier circuits are the same circuits for all frequencies between 15
and 200 kHz except 400 kHz. When the ES board is set to 400 kHz, the connector CN3 is marked
by "400 kHz"
Jumper settings, J1 and J7, depend on the frequency of the ES board and are detected by the CPU on
the MAIN board to generate the transmission signal and 1st local carrier signals to the ES board. The
signal from the connector J2 is displayed on the right side screen (H) and the signal from the J1 is
displayed on the left side screen (L) when the dual display mode is selected.
Jumpers, J2 and J8, are set depending on the presence of the ES board.
Transmitting
The transmission output voltage is determined by the VTX voltage which is controlled by the CPU
in accordance with the "SUPPLY VOLTAGE" set on the XDCR SETTING menu.
The maximum output power of the transmission circuit is 3 kW.
TX0 L
TX1 L
TX0 H
TX1 H
TP50
TP49
TP6
TP5
TP48
TP47
TP4
TP1
DIODE
TRAP
DIODE
TRAP
LPF
Filter
Q9 - Q16
Q1 - Q8
TX AMP.
TX AMP.
VTX-H
VTX-L
CR29
CR16
1
3
J4
1
3
J3
U29
U1
TP36
TP37
TP19
TP9
TP42
TP43
TP27
TP28
TP34
TP35
TP8
TP18
TP41
TP26
TP40
TP33
TP16
TP17
TP31
TP32
TP14
TP15
TP30
TP39
TP13
TP12
1st LOCAL H-H
1st LOCAL L-H
TVG - H
TVG - L
2nd LOCAL H-H
2nd LOCAL L-H
V REF
V REF
TRX SIG H-H
TRX SIG H-C
TRX SIG L-H
TRX SIG L-C
17
18
J2
17
18
J1
KPTX0 L
KPTX1 L 1
2
J1
KPTX0 H
KPTX1 H 1
2
J2
TP45
TP7
TRXTVG H-H
TRXTVG L-H
1st LOCAL L-C
1st LOCAL H-C
2nd LOCAL L-C
2nd LOCAL H-C
1st LOCAL H-H
1st LOCAL H-C
2nd LOCAL H-H
2nd LOCAL H-C
1st LOCAL L-H
1st LOCAL L-C
2nd LOCAL L-C
2nd LOCAL L-H
LOCAL 1-H
LOCAL 1-L
LOCAL 2-H
LOCAL 2-L
TP11
TP10
TP46
TP44
TP20
TP21
TP22
TP23
4
6
J1
4
6
J2
J2
J1
VTX-L
VTX-H
TRXTVG L-H
TRXTVG H-H 15
15
20
20
TRXST1 L
TRXST2 L
TRXST1 H
TRXST2 H 13
14
J2
13
14
J1
JP1
JP8
JP7
JP2
Frequency
Up to 200kHz 400kHz
JP1 short open
JP2 short short
JP7 short open
JP8 short short
J2
8
J1
9
11
TP25
TP24
TP3
TP29
12VP
12VA
5VA P
5VA M
V REF TP2
XX
Filter
Amp.
Amp.
BPF
BPF
X
X
Filter
Filter Filter
Filter
246 kHz
246 kHz
246 kHz
246 kHz
11 kHz
246 kHz
TVG REG.
TVG REG.
Buffer

13
Receiving Circuit
The Received signals both H and L frequencies are converted into 246.2 kHz (1st IF signal) by the
first mixer circuit and then converted into 11 kHz (2nd IF signal) by the second mixer circuit after
amplified by the TVG amplifier circuit. The local carrier signals (1st LOCAL/ 2nd LOCAL) for the
mixer circuit are generated by the MAIN board.
The 2nd IF signals named "TRX SIG H" and "TRX SIG L" are outputted to the MAIN board.
The amplitude of the receiver circuit is controlled by the TVG voltage (TRX TVG) which is also
generated by the MAIN board. The maximum amplitude of the receiver circuit is 46 dB.
3.3.3 MAIN Board (02P6269)
See the block diagram shown in figure 3.6.
Received signals ( TRX SIG H/L ) from the ES board are converted into digital signals by the A/D
converter "U64" and then converted into parallel data by the serial to parallel converter "U26".
The output of the U26, linear signal, is compressed into log signal by the linear to log converter
"U8" and then sent to the switching circuit composed by U9/U10/U11/U15.
In the switching circuit, the received signals, digital and log signals, from the internal transceiver
unit or the external transceiver unit, are switched according to the display mode selection and then
selected signal is sent to the master and slave Gate Arrays "U65/U66".
The slave Gate Array (U66) processes the signal (L) and then output it to the master Gate Array.
The master Gate Array (U65) processes the signal (H) and converts into R/G/B signals, the signal
(L) from the slave Gate Array(U66) is also converted into R/G/B signals by U65. The R/G/B signals
are sent to the display unit or the interface unit "IF-8000" from the connector CN1.
The Master Gate Array also generates the transmission data to the DDS (direct digital synthesizer)
and KPOM/KPOS to the KP Selector. When internal transceiver unit is selected in the "ES DRAFT
SETTING" menu, the KPOM and KPOS are supplied to each DDS circuit as KPIM/ KPIS. When
the external transceiver unit (ETR) is selected on the menu, the KPOM/KPOS named EKPO are
outputted to the ETR. Each DDS circuit generates transmission signals "TX1H/TX0H and
TX1L/TX0L" to each TX amplifier circuit and carrier signals "LOCAL 1 H and LOCAL1 L" to
each mixer circuit on the ES board.

14
Figure 3.6 Block diagram of MAIN Board
CPU
Control
Data
Address
EEPROM
Flash ROM SRAM
UART DRAM
DRAM SLAVE
GATE ARRAY
MASTER GATE ARRAY
U65
U66
R
G BDDS
Direct Digital Synthesizer
DDS Direct Digital Synthesizer
TX1 L
TX0 L
LOCAL 1 L
TX1 H
TX0 H
LOCAL 1 H
TP33 TP31
TP23
TP4
TP5
TP12
TP21
TP22
CR12
CR11
KPIM
KPIS
Switching Internal/external
Switching Internal/external ETR
KP Seleckt
KPOM
KPOS
TP11
TP28
KPIM
KPIS
EKPO L1
EKPO H1
KPIM
KPIS
KP1
TP30
TP10
TP2
TP29
EKPO H
EKPO L
5.6448MHz
NMEA
PNL CPU
FNZ-18
TRXTVG H
KP2
TRXTVG L
KPSW L
KPSW H
TP6
CR3
TP35
CR16
ROM Liner to Log Converter
Serial to Parallel Converter & Detector U26
A/D Converter/ Band Control
TRX SIG L H
TRX SIG H H
TRX SIG L C
TRX SIG H C
U64
KPTX0 L
KPTX1 L
KPTX0 H
KPTX1 H
1 2
1 2
J4
J5
4
4
2
4
2
4
15
15
J4
J5
J5
J4
6
TP13
LOCAL2 235.2kHz 6
J4
J5
1
2
3
4
5
6
CN1
EX IF
Power Sync.
22.5792MHz
1/4 1/24
D/A Converter
Buffer
KPIM
KPIS
KP Seleckt
EKP H
EKP L

15
3.3.4 EXIF Board (02P6278/02P6279)
Figure 3.7 shows the block diagram of the EXIF Unit.
Figure 3.7 Block diagram of EXIF Unit
The EXIF unit is required when the external transceiver unit (ETR) is installed, and when
monitoring the video signal with the external equipment or monitoring the video signal from the
external equipment.
For external transceiver unit (ETR)
The EXIF outputs the GAIN/TVG control voltage and transmission trigger pulse (KP OUT H/L),
and inputs the echo signals (SIG IN AC/DC) and KPs (KP IN H/L).
The KP IN H and KP IN L signals are feedback signals of the transmission trigger pulse to acquire
the received signal into the processor circuit on the MAIN board.
Signal Output (SIG OUT)
Only echo signals of the internal transceiver unit are outputted from SIG OUT terminal of the EXIF
unit. When external transceiver unit is selected on the menu, the signal output is suspended.
KP Output
Trigger signals corresponding to the selected unit in the menu are outputted from the KP OUT
Buffer
Buffer
Filter
Filter
Mixer
Mixer
Latch
Latch
Log/Linear
Converter
CPU
Detector
Detector
A/D
Converter
D/A
Converter
Selector Linear/Log
Converter
Buffer
Buffer
SIG IN AC/DC-H
SIG IN AC/DC-L
KP IN- H
KP IN - L
KP OUT - H
KP OUT- L
SIG OUT - H
SIG OUT- L
GAIN H
TVG H
GAIN L
TVG L
Buffer
Buffer
Buffer
1
2
3
6
19
10
11
12
13
14
15
1
2
3
6
19
10
11
12
13
14
15
CN7 CN8
Decoder
D/A
Converter
D/A
Converter
EXIF2 02P6279 EXIF1 02P6278
MAIN 02P6269
Decoder
Decoder
Decoder

16
terminals when the external transceiver unit (ETR) or EX mode is selected.
Gain and TVG voltage
When external transceiver unit is selected on the menu, Gain and TVG data, which are set on the
control panel, are derived from the CPU on the MAIN board to the CPU on the EXIF board and
converted into the analog voltage by the D/A converter.
The analog Gain and TVG voltage is supplied to the receiver amplifier in the ETR unit and control
the amplitude.
Gain and TVG control voltage are outputted from the EXIF board. The CPU on the EXIF1 board
generates the Gain and TVG data to the D/A converter in accordance with the GAIN/TVG data sent
by the CPU on the MAIN board.

17
4. TEST POINT, LED and ADJUSTER
4.1 DISP Board (06P0238)
Figure 4.1 DISP board
TestPoint
TP Name Measurings Remarks
TP 1 5 V 5.0 V + 0.25 V Source voltage of LCD control circuit in LCD Unit
TP 3 PGND
TP 4 2.4 V 2.4 V + 0.05 V VCO Control Voltage of PLL circuit
TP 7 +12 V 12.0 V + 0.2 V Source voltage of LCD inverter board
TP 8 +5 V 5.0 v + 0.25 V +5 V for DISP board circuit
TP10 GND 0 V
TP11 GND 0 V
TP12 FREQ 70 kHz + 1 kHz Switching clock of power circuit
Adjuster
Adj. Functions
R65 Adjustsswitching frequency 70 kHz (+ 1 kHz ) measuring at TP12
R75 Adjusts +12 voltage measuring at TP7
C63 Adjusts VCO control voltage measuring at TP4
TP 7
TP 8
TP 3
TP10
TP 4
TP12
TP1
TP11
R65
R75
F1: 3A
J1
C63