Control Panel; Logic Board - GE ZIB240P Technical Service Manual

Control Panel

The control panel is held in place by 2 Phillips-
head screws.
Caution: When reinstalling the control panel,
make sure control panel wires are routed properly
to avoid pinching.

Logic Board

The logic board is located behind the control
panel.
Run diagnostic mode 02 to test the link between
the logic board and power supply board. (
Diagnostics and Service Information
Troubleshooting the Logic Board
If the compressor is not operating and the display
is not illuminated:
1. Check for 5 VDC between pin #1 and pin #4
on the logic board while it is connected.
2. If it is less than 5 VDC, disconnect the
connector from the logic board. Measure
the voltage between pin #1 and #4 of the
connector. If this voltage is less than 5 VDC,
there may be a problem with the wiring or
power supply board.
3. Check the voltage between pin #1 and pin #4
at K11 on the power supply board to continue
troubleshooting.
REED DOOR SW
.
BROWN
BLACK
LOGIC
BLUE
BOARD
WHITE
See
.)
Power Supply Board
K11
1 COM
2 DATA
3 CLK
4 +5V
– 9 –
Power Supply Board
The power supply board is housed in a sliding
tray above the machine compartment. The tray is
held in place by 2 Phillips-head screws.
DC SIDE
FZ NTC FF + EVAP NTC
K9 K5
J3 J2
LOGIC BD.
K11
K14 K13
DMPR. EVAP.
HEATER FAN
DAMPER
K6
Caution: The lock tabs on all low-voltage wire
connectors on the power supply board and
logic board are fragile. The tabs can break if
excessive pressure is applied when unplugging
the connector.
Power Supply Board
AC SIDE
FILL TB + DEF
K4
HEATERS
LIGHT
K3
ICE MAKER K2
POWER K1
(Continued next page)