Communication Error - Kenmore 795.77562600 Service Manual

Communication Error

CON5
MAIN
PCB
Is Er-CO displayed?
Yes
Display PCB
Is the connection loose?
No
Display PCB
Is the voltage between
pins 4 and pin 5 of
CON101?
pin5 BO
pin4 BN
Receiver fail Voltages
Test Point Ressult
pin4 to pin5
0 V or 5 V
Yes
Hinge
RD(Rx)
4
4
BN(Tx)
3
3
BO(GND)
2
2
WH/BK(12V)
1
1
Wiring diagram
Reconnect
Yes
Replace the
No
Display PCB
- 27 -
RD(Tx)
4
3
BN(Rx)
3
4
BO(GND)
2
5
WH/BK(12V)
1
6
Display PCB
Is the voltage between
pin3 and pin5 of CON101
0 V or 5 V?
Transmitter Voltages
Test Point Ressult
pin3 to pin5
0 V or 5 V
Yes
Is the joint connection
loose In the Hinge?
Yes
CON101
DISPLAY
PCB
* Rx: Receiver
Tx: Transmitter
Replace
No
Display PCB
Pin5 BO
Pin3 RD
Reconnect
No