Furuno FR-2155, Service Manual

Page: 19 / 152

2-5
Board Name Function
PNL Board
03P9255
1) Outputs encoded data of EBL, VRM and trackball signals.
2) Includes GAIN, STC, FTC, and BRIL volumes.
3) Includes EBL ON/OFF, VRM ON/OFF, FUNC 1/2/3/4, and Range +/- keys.
4) Reads PAL/PAR board status.
PAL Board
03P9254
1) Includes ANT ON/OFF, Performance monitor ON/OFF, and degauss switches.
2) Includes CPU Fail indicator (LED).
PAR Board
03P9256
1) Keys: HL OFF, PANEL BRILL, ACQ, and menu keys
DEGAUSS
Board
PDM9025
1) Automatically degausses the screen at power-up.
2) Detects magnetism and automatically degausses every 20s.
3) Degausses the screen when DEGAUSS switch is pressed.
MOTHER Board
03P9251
1) Connects each PCB.
2) Includes a connector for the antenna unit.
3) Includes a connector for the RJ-8.
4) Includes a connector for the control head.
GYRO
CONVERTER
Board
64P1106
1) Converts gyrocompass signal into AD format signal.
2) Outputs Max. 6 AD format signal (25 ms or 200 ms jumper selection, select 25 ms for
radar and ARPA.)
PTU Board (AC)
03P9245
1) Outputs -12V, +12V, +140V (for CRT), +5V and +32V (for tuning cont.), and motor
drive voltage.
2) Outputs Power Fail (PF) signal to the RP Board.
3) 110 VAC, 24 rpm : 03P9245A
110 VAC, 42 rpm : 03P9245C
220 VAC, 24 rpm : 03P9245D
220 VAC, 42 rpm : 03P9245F
4) Contains overcurrent protector for -12V,+12V, and +140V.
5) Contains abnormal input voltage detector.
110 VAC : Low voltage, 73 to 78 VAC; high voltage, 146 to 170 VAC
220 VAC : Low voltage, 130 to 144 VAC; high voltage, 260 to 288 VAC
Color Monitor
Assy.
CDT-2136B
1) No HV is generated when H Sync. Signal is input to the monitor circuit.
PM Board
03P9255
optional
1) Power supply circuit for the performance monitor