Checking Antenna Coupler; Checking For Running Of Cpu; Checking Self-Test; Ensuring Finish Of Cables And Mounting Of Components - Furuno FS-1575 Service Manual

6.9.2 Checking Antenna Coupler

1. Checking for running of CPU

When the CR10 on the COUP board turns ON and OFF in 2-sec. period, this means that
the CPU is running. If the CR10 does not turn ON and OFF, replace the COUP board.

2. Checking self-test

When the [CHECK] push button switch on the COUP board is pressed, relays that
control the capacitors and coils of the matching circuit will turn ON and OFF one after
another. If any of the relays does not turn ON and OFF, replace the COUP board.
It can be checked visually or by hearing sound whether the relay turns ON and OFF.

3. Ensuring finish of cables and mounting of components

Ensure that coils and capacitors are fixed with silicone rubber, and that screws fixing
disc-shaped titanium oxide capacitors and leads are securely fastened.
Ensure that relay leads come into touch with nowhere.
Connect the shield wires of control cable to the ground terminal and fix the cable with
cable clamps.
Checking cables
Fixing
components
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.
6-56
6.9 Checking Antenna Coupler
Checking leads