General Checking And Maintenance; Cleaning The Terminal Unit And Communication Unit; Checking Connectors And Earth Terminal; Floppy Disk Drive Head - Furuno FELCOM 12 Operator's Manual

General Checking and Maintenance

8-2
Turn off the power before conducting any maintenance procedures
other than the cleaning of the terminal unit and communication unit.
Cleaning the terminal unit and communication
unit
These units can be cleaned with a soft, dry cloth. DO NOT use chemi-
cal cleaners. They may remove paint and markings.

Checking connectors and earth terminal

The connectors and earth terminal on the rear panel of the communi-
cation unit and on the bottom panel of the terminal unit should be
checked periodically for tightness. If the earth terminal has rusted,
clean it.

Floppy disk drive head

The floppy disk is coated with a magnetic material which stores in-
formation entered into the disk. If this material is damaged by for-
eign material adhering to the disk drive head it may not be possible to
read from or write to the disk. Clean the head regularly with a clean-
ing floppy disk to prevent loss of data.
When the power can't be turned on (power lamp
does not light)
3) and 4) are for service technicians.
1) Check the power cable connector on both the rear panel of the
terminal unit and communication unit for tightness. Check if the
ship's mains switchboard is turned on.
2) On the terminal unit, check the breaker on the rear panel. If it has
tripped it will be protruding several millimeters. Reset it if neces-
sary.
3) On the rear panel of the terminal unit, disconnect the power cable.
Connect a multimeter to the power cable connector and confirm
21.6 and 31.2 V. (pin #1: positive, pin #2: negative)
4) On the rear panel of the communication unit, disconnect the power
cable. Connect a multimeter to the power cable connector and
confirm 21.6 and 31.2 V. (pin #1 and #2: positive, pin #3 and #4:
negative)