Service manual

REPLACEMENT OF CIRCUIT BOARDS
Models:
RM663
RM763
RM1303
Refrigerator
Bulletin
R58/7A
April 1987 Rev. 5/87
When replacing the circuit board in the 663, 763 and 1303, you MUST, upon inspection of the board,
install the 12
Volt DC fuse provided. See Item
#2, Page 2.
1.
When working on an AES style refrigerator and replacing the circuit board, the old board
should be visually inspected for any obvious damage, i.e. burnt components, damaged leads,
burnt connectors, corrosion, etc.
a.
When the board is damaged, see the following illustrations for what to check and correct
before changing the circuit board:
FIG.
1
1.
2.
3.
4.
The
following paragraph numbers relate to the same indicator numbers at the ci
desi
gnations.
rcuit board
If this lead is damaged:
Look for a short
circuit or damage in the interior light cable.
If this lead is damaged:
Look for a short
circuit or damage in the ribbon cable to the
main switch and thermostat.
5. If this lead(s) is damaged: Check for proper
resistance
in Ohm’s of the A/C heating
element and all 120 volt cables for short
circuit or damage.
6. If this component is discolored, burned or
If this component is discolored, burned or
blown: Check all cables in the 12 volt system
blown:
Check for proper polarity of gas
solenoid lead.
for short circuits.
7. If this component is discolored, burned
or
If this component is discolored, burned or
blown:
Check that the 12 volt connections
are correct and that there is a battery between
alternator and refrigerator.
blown:
Check for proper plug connections
solenoid and thermostat on circuit
of gas
board.
Check for short circuit or damage in
ribbon cable to indicator light, thermostat.
A-
1
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