Furuno GP-90 User manual

GPS NAVIGATOR
GP-90/90-DUAL
Back

Your Local Agent/DealerYour Local Agent/Dealer
9-52 Ashihara-cho,9-52 Ashihara-cho,
Nishinomi
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a, Ja
p
anNishinomi
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a, Ja
p
an
Tele
p
hone :Tele
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hone : 0798-65-21110798-65-2111
faxfax 0798-65-42000798-65-4200
::
F
IRST EDITION :
F
IRST EDITION : NOV.NOV. 20032003
Printed in JapanPrinted in Japan
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ll ri
g
hts reserved.
A
ll ri
g
hts reserved.
PUB.No.PUB.No. SME-44270-ASME-44270-A
*00014894400**00014894400*
*00014894400**00014894400*
(( KAOKKAOK )) GP-90GP-90 * 0 0 0 1 4 8 9 4 4 0 0 ** 0 0 0 1 4 8 9 4 4 0 0 *
*SME44270A00**SME44270A00*
*SME44270A00**SME44270A00*
* S M E 4 4 2 7 0 A 0 0 ** S M E 4 4 2 7 0 A 0 0 *

Contents
1. Circuit Description
1.1 Antenna Unit............................................................................1
1.2 Display Unit.............................................................................1
1.3 LCD Driver Signal...................................................................4
1.4 GP-90 - DUAL ........................................................................4
2. Location of Parts .............................................................5
3. Maintenance
3.1 Adjustment...............................................................................6
3.2 Jumper Setting.........................................................................7
3.3 Battery Replacement................................................................8
4. Troubleshooting
4.1 Error Messages......................................................................10
4.2 LED Status.............................................................................10
4.3 Selftest...................................................................................10
4.4 Troubleshooting Flow Chart..................................................13
5. Communication with PC
5.1 Connection.............................................................................19
5.2 Setting....................................................................................19
5.3 DATA Transfer ......................................................................19
5.4 Data Format...........................................................................20
6. Program Upgradation
6.1 Using PC................................................................................23
6.2 Using MT-08 .........................................................................24
6.3 DIP Switch Setting ................................................................24
6.4 Procedure...............................................................................25
Schematic Diagrams ...............................................................S-1

1. Circuit Description
1
GP-90 features;
1) WAAS-capability (From the production in December 2003)
2) Compliance of IEC61108-1 ed.2
3) Calculation of set and drift based on NMEA ground speed and heading data (From the
production in December 2003)
4) Entering waypoint in range and bearing data (From the production in December 2003)
1.1 Antenna Unit
The antenna unit includes a preamplifier. The antenna cable carries +5 V to power the preamplifier.
The GPS signal received by the antenna is delivered to the GPS board, GN-8091. The GPS board
selftest cannot detect the short circuit on the antenna cable.
1.2 Display Unit
Figure 1 shows the block diagram of the display unit.
PREAMP
Beacon Antenna
ANTENNA UNIT DISPLAY UNIT
Lat/Long, SPD/CRS
GPS initial data
LCD
Key Data
LED Brill,
Display Data
+24 V,
AC210 V
GN-8091 Board
GPS
Power supply
PNL Board
(20P8148)
Keyboard
BEACON
Receiver
(
GR-7000A
)
+5V,+12V
NP Board
(20P8188)
RTCM SC-104
10.2 - 31.2 V
+5 V
Fig. 1 Block diagram of GP-90
RX SIG
5 V

1. Circuit Description
2
GPS Board, GN-8091
The board is 12 discrete channel, all - in - view, L1 GPS receiver which processes GPS signal for
position fixing and for calculating speed and course of the ship.
NP board, 20P8188
The board mainly consists of a CPU, Flash ROM stored system program, Video RAM, Backup battery,
and power supply circuit. Major function of the board is;
1) Control of entire system
2) Reading key data
3) Control of input and output data
4) Storage of GPS data, waypoints and mark data
5) Graphic data processing
6) Output of display data to LCD
7) Output of log pulse (contact closure signal), if selected
8) Producing following voltages
+5 V: for digital circuit and internal beacon receiver
+12 V: for flash memory and analog circuit
–20.5 V: LCD drive voltage
210 Vac: for LCD backlight
PNL Board, 20P8148
The board consists of 18 switches, 10 LEDs used to adjust brilliance, a buzzer, and a temperature
coefficient resistor (R1). The contrast of LCD is kept constant by R1.
LCD, EW50136FDW
The LCD contrast is stabilized by temperature compensation. Decreasing temperature, for instance,
causes an increase in R1’s resistance and a consequent increase in the LCD bias voltage. The NP board,
20P8188 outputs the bias voltage from pin 2 of J10. The bias is approximately –17.9 V at 25 °C in
automatic bias mode. The bias changes from –20 V to –16 V at 25 °C in manual bias mode.

1. Circuit Description
3
To LCD Unit
To LCD Unit
To PNL Unit
From Personal Computer, Beaco
n
Receiver
From Built-in Beacon Receiver Program
ROM
(Flash ROM)
8 Mbit
U16
CR7
#26
#30,#41
#27
#31
MPU
TMP68301
#43
#50-52
DATA 1 DATA 3
#40 #41 #44
RS-232C (5 V),
RS-422 (0 V)
DATA 2
J3 MOB IN
RXD
TXD
U29 #18,U30 #4
#14 #11
CH A CH B
SIO
RS-232C(U29)
RS-422(U30)
Selector
U29,U30 U23
+12 V +5 V -20.5 V
DATA 4
POWER
Address G/A
ACRTC Controller, LCD I/F, KEY I/F
16 MHz
8 MHz
U15
RAM
2 Mbit
CG
ROM
4 Mbit
VIDEO
RAM
3 Mbit
6.2 MHz
Address Data ACRTC
U5
Key Data Picture Data
←Lat/Long,SPD/CRS,Time Date,etc
+5 V
GPS INITIAL SETTING→
U12, U13 U21, U27 U14 U24 U25
U26
CFL Regulator
Contrast Adjuster. #6
JP1
BT1 #3
BAT VOLT
Detector
U22
#2 VBAK
(
+3V
)
Tout1
Connected to temperature sensing resister(2.7 V at about 20°C)
Vo (-16 V to –20 V)
J4
J10
14
J9 J11
To GPS RECEIVER
2
1, 4
5
3, 4
1, 2 1, 2
3, 4
1 3 2 3 3 1
1, 2
Brilliance and Contrast Adjuster. (D/A CONV.)
U2
TXD
RXD
11-14
1-10
U3
Q6,Q7,T1,U1
J2
ON/OFF
Switching
Regulator
Controller
Switching
Regulator
Q16
U8
U38
TXD RXD
RXD
TXD
JP4, JP5
CONTACT
SIG. GEN
Fig.1.2 Block diagram of NP board

1. Circuit Description
4
1.3 LCD Driver Signal
The table below illustrates the pin assignments of J10, LCD connector on NP board.
J10 Signal Remarks J10 Signal Remarks
#1 F.G Frame Ground #8 M AC signal for LCD driving
#2 Vo Power supply voltage for
contrast adjustment #9 FRM Frame start signal (Data
signal of the shift register of
the common driver)
#3 VEE LCD driver supply voltage
(-20.5 V) #10 DISP OFF Display off signal, Active low
#4 Vss GND #11 D3 Display data
#5 VDD +5 V #12 D2 Display data
#6 CP Clock pulse for segment shift
register (Data shift pulse) #13 D1 Display data
#7 LOAD Common driver data shift
signal: also latches the data of
the line immediately above.
#14 D0 Display data
1.4 GP-90-DUAL
GP-90 - DUAL consists of two GPS receivers and an interface unit, IF-2500.
The GPS receiver for dual configuration differs from one for single configuration only in software.
Antenna Unit
12 - 24 VDC
GPA - 017S (GPS)
GPA - 018S (DGPS, Whip)
GPA - 019S (DGPS)
ANT
MJ - A6SPF0012 - 100
(Comes with IF - 2500 )
DATA 1
DATA 3
DATA 4
DATA 2
MJ - A6SPF003 - 050
MJ - A2SPF014 - 03 Display Unit
ANT
DATA 1
DATA 3
DATA 4
DATA 2
MJ - A2SPF014 - 03
12 - 24 VDC
GPA - 017S (GPS)
GPA - 018S (DGPS, Whip)
GPA - 019S (DGPS)
GP-90 - DUAL
GP-90 - DUAL
IF - 2500
E/S, Radar & Autopilot Alarm system
VCTF1.25X2C
12 - 24 VDC
VH2P - 002
XH4P - 002 XH5P-002 XH3P - 002
Contact - closure signal
INPUT INPUT
Antenna Unit
J2 (XH6P) J3 (XH6P)
J1(VH2P)
(XH3P)
J10 (XH3P) J11 (XH3P) J12
(XH4P)
J4 (XH4P) J5 (XH4P)
J6 (XH4P) J7 (XH5P) J8
Display Unit
Fig.1.3

2. Location of Parts
5
Fig.2.3 Front panel without LCD
PNL Board
(20P8148)
Fig.2.2 Front panel, rear view
LCD
EW50136DW
Fig.2.1 GP-90 Display unit
Beacon receiver
GR-7000A
(Optional)
Power supply circuit
4A Fuse
NP Board
(20P8188)
GPS receiver
GN-8091

3. Maintenance
6
See Fig.3.3 for
enlarged view.
Fig.3.1 NP Board (20P8188)
See Fig.3.2 for
enlarged view.
3.1 Adjustment
Switching regulator frequency and +5 V are adjusted by R34 and R84 respectively as shown in Table
3.1.
Table 3.1 Adjusters on NP board
Test points Adjuster Rating
Gate of Q16 and GND(R80) R34 82.3 to 84.3 KHz
J2#3(+) and J2#5(-) R84 5.07 V to 5.17 V
Fig.3.2 Power supply circuit, enlarged view (NP Board)
Regulator, U8
Type : PQ09RA1
Code : 000-131-421
Q16 gate
4A Fuse
R34 (F - ADJ)
R84 (V - ADJ)
J2

3. Maintenance
7
3.2 Jumper Setting
Table 3.2 lists the function of jumpers.
Table 3.2 Jumpers on NP board
Jumper Connected Removed
JP1 (BAT) Normal operation* Battery replacement
JP2 (EMU) Not used Not used*
JP3 (BEACON) Not used* Not used
JP4 (NMEA) Not used* When JP5 is connected.
JP5 (LOG) Log pulse from DATA 3 When JP4 is connected.
*Factory - default
JP2
JP1
JP5 JP3 JP4
Fig.3.3 Jumpers on NP Board, enlarged view

3. Maintenance
8
Output of log pulse signal
MNEA0183 signal is output from DATA 3 port with factory - default setting. Put short jumpers on JP5
instead of JP4 to output log pulse from DATA 3 post.
Table 3.3 Setting of JP4 and JP5
Jumper NMEA0183 Log pulse
JP4 (2pcs.) Connected Removed
JP5 (3pcs.) Removed Connected
3.3 Battery Replacement
The battery is replaced with new one by following of the steps below.
1. Disconnect JP1 on NP board. See Fig. 3.3.
2. Use a desoldering tool to remove the battery from NP board.
3. Solder the replacement battery onto the board.
4. Fix the battery onto the board with silicone sealant.
5. Solder JP1.
CAUTION
(1) Replace the battery only with CR2450 - F2 ST2L (000-144-941).
(2) Never short + and - sides of the cell.
(3) The lithium cell may explode resulting in a fire or chemical burn if mistreated. Do not
recharge, disassemble, or incinerate.
(4) Follow local ordinances or regulations for the disposal.
MOS
FET
Relay
1
2
Load
Max. 500 mA, 50 VDC
ON/OFF
U38
G3VM-61E
6
5
4
DATA 3
(Observe the polarity
when connecting DC power supply.)
NP Board
Fig.3.4 Connection of load to MOS FET relay

3. Maintenance
9
Lithium Battery
Type : CR2450-F2ST2L
Code : 000-144-941
Fig.3.5 NP Board (20P8188), Soldering side

4.Troubleshooting
10
4.1 Error Messages
Table 4.1 lists error codes.
Table 4.1 Error messages
Error message Possible cause Action
GPS No fix When GPS signal is suddenly
lost. 1) Check antenna connections.
2) Replace GN-8091 board.
DGPS error DGPS beacon station is
experiencing transmitting
problems.
1) Check DGPS coverage.
2) Replace beacon receiver.
GPS SELFTEST
error
If the selftest (conducted when
turning on the power) finds any
error.
1) Replace GN-8091 board.
(Disconnection between GN-8091
and NP board does not generate
this message.)
4.2 LED Status
CR7 on NP board indicates the status of MPU (U16).
Table 4.2 LED
Board Parts No. Remarks
20P8188 CR7
Blinks every second to indicate
normal MPU operation.
4.3 Selftest
Selftest is performed through SELFTESTS menu.
1) Memory and I/O circuits test
1.Press [MENU] and then [8] to display the SELFTEST menu.
1.Memory, I/O Port Test
2.Keyboard Test
3.Test Pattern
4.Automatic Testing
GPS PROGRAM No.4850237003
NAV PROGRAM No.2051512-02.xx
BOOT PROGRAM Code B
!" : Cursor
ENT: Enter MENU: Escape
SELF TESTS
xx: Version number

4. Troubleshooting
11
2. Press [1].
Table 4.3 Details of selftest
No. Test item How to test Parts to be tested
1 PROGRAM MEMORY
(Flash ROM) Reading check sum data U12, U13
2 SRAM Writing test data and reading it. U21, U27
3 Internal Battery 2.65 V or more BT1
4 DATA 1 PORT U16, Q13, U17, R78
5 DATA 2 PORT U16, Q14, U28, R71
6 DATA 4 PORT
Receiving output data with
short-connector
U23 (SIO), U16
U29 (RS - 232C),
U30 (RS - 422),
R97, R98
7 GPS Selftest of GN - 8091
(See next page for details.) GN-8091
8 BEACON Receiving receiver status by sending
request signal. GR-7000A
PROGRAM MEMORY OK
SRAM OK
Internal Battery OK
DATA 1 PORT NG
DATA 2 PORT NG
DATA 4 PORT NG
GPS OK
BEACON OK
MENU: Escape
MEMORY, I/O PORT TEST
NG appears if the test
connectors are not connected
to DATA ports
Blank if BEACON board is
not installed.

4. Troubleshooting
12
If GPS selftest detects an error, it is indicated by an error code listed in table 4.4.
Table 4.4 GPS selftest error codes
Errors Error
codes Errors Error codes
ROM Error 03 RAM Error and RTC Error 24
RAM Error 04 BACK UP MEMORY Error and RTC Error 30
BACK UP MEMORY Error 10 ROM Error, RAM Error and BACK UP
MEMORY Error 17
RTC (Real Time Clock) Error 20 ROM Error, RAM Error and RTC Error 27
ROM Error and RAM Error 07 ROM Error, BACK UP MEMORY Error and
RTC Error 33
ROM Error and BACK UP
MEMORY Error 13 RAM Error, BACK UP MEMORY Error and
RTC Error 34
ROM Error and RTC Error 23 ROM Error, RAM Error, BACK UP
MEMORY Error and RTC Error 37
RAM Error and BACK UP
MEMORY Error 14 Discontinuity of cable between GN-8091
and NP Board. FF
Table 4.5 lists an error vs. defective parts.
Table 4.5
No. Error Faulty Parts
1 ROM Error U4
2 SRAM Error U5
3 BACK UP MEMORY Error BT1, CR3, and surrounding
circuit on NP Board
4 RTC Error U1

4. Troubleshooting
13
4.4 Troubleshooting Flow Chart
Start
Press Power Switch.
Power? Flow chart 1
Position fix?
DGPS 2D/3D
mode?
Normal display?
Key operation?
End
No
Yes
No
No
No
No
Flow chart 2
Flow chart 3
Flow chart 4
Flow chart 5
Yes
Yes
Yes
Yes

4. Troubleshooting
14
Defective power supply
Wrong polarity
Defective power switch
Short - circuit between #19
and #20 of J9
1) GN - 8091 Board is defective, if the unit is
powered on with GN - 8091 disconnected
2) LCD unit is defective, if the unit is powered
on with J10 on the NP Board disconnected
3) MPU on the NP Board is not running if
CR7 is not blinking
Neither +5 V nor +12 V on J2
Defective regulator U8 (PQ09RA1)
Defective power supply
circuit on NP Board
+5 V and +12 V is normal
on J2
Open - circuit between #19 and
#20 of J9
Symptom: Fails to power
Supply voltage?
Flow 1
Blown fuse?
Power switch is
normal?
Vo of U8 is
+9 V?
<10.2 V
10.2 to 31.2 V
No
Yes
9 V
0 V
Top view of U8
#4 #3 #2 #1 #1 : Vin
#2 : Vo
#3 : GND
#4 : Vc
GND line is equal potential to negative
power supply line.
Power on/off Vin Vo Vc
At power-off 24V 0V 0V
At power-on 24V 7V 16V
(Measured with 24 V power supply)
Power on with J2
disconnected

4. Troubleshooting
15
Flow 2
L/L data and time
are normal?
Carry out GPS
selftest
5 V?
No
OK
No
Yes
OK
Measure +5 V at ANT
connector.
Disconnect GPS antenna cable
and check for discontinuity and
short circuit.
Position fix Wrong initialization
(Defective keep-alive
battery)
Defective GN-8091
OK?
Change antenna.
1) Defective antenna connector or cable
2) Defective power supply circuit on 20P8188
No Defective antenna connector or cable
Change
GN - 8091 1) Interference from other unit
2) Noise on power line
Yes
End
No position fix
Enter correct
L/L thru initial
set - up menu.
N
G
NG NG
OK
Yes
Symptom: No fix

4. Troubleshooting
16
Beacon NG
Beacon OK
Yes
No
Station selection and
initialization are OK?
Receiving Condition?
(
Menu, 7
)
Defective U16
(Beacon receiver is detected automatically)
Defective cable between beacon receiver an
d
NP Board, or defective NP Board
No Select an adequate station and initialize
correctly
Yes
Signal strength and S/
N
ratio: 1 to 4 dB Defective beacon antenna or defective
beacon receiver
Signal strength: 30 dB, SN ratio: less than 7 dB
Station ID is OK?
(
Menu, 7
)
Blank Out of beacon signal coverage area, or poo
r
grounding of beacon antenna
Number displayed
DGPS Data is OK?
(
Menu, 7
)
Selftest is OK?
(Menu, 8,1)
“- -”or abnormal Far from beacon transmitter, or poo
r
grounding of beacon antenna
Good
Beacon Station is normal
?
(
Menu, 7
)
Abnormal
Defective GN-8091
Normal
Beacon transmitter problem
Symptom: No DGPS 2D/3D mode
“BEACON RCVR
INSTALLED”appears
at power - up display
Flow 3

4. Troubleshooting
17
Flow 4
Brilliance?
(Bril setting: 4) Output from J4 on NP Board?
Dark about 200 VAC Defective LCD unit
Light
Key beep?
(No picture)
Defective NP Board
0 VAC
See Flow 5.
No Key beep
Key beep
Output from J10
on NP Board?
Abnormal Defective NP Board
Normal
Defective LCD Unit
Symptom: Abnormal display