Samsung RT38 Service Manual page 56

TROUBLESHOOTING
4-2-7. When PANEL PCB operates abnormally
When PANEL PCB does not light up or partially does
Refer to Wiring Diagram
attached in this manual
and check the Electrical
Diagrams attached on the
back of the unit.
When PANEL KEY is
not selected
When Panel PCB buttons are not working
※ When the trouble is being remained after the above,
Start
The connector on the
Fridge Top Table is
inserted properly.
Yes
MAIN PCB Connector
(CN51) is inserted
properly
Yes
DOOR PANEL PCB
Connector is inserted
properly
Yes
It lights up when
PANEL-PCB is being
replaced
No
Check Fridge Door Wiring - Short or Open Wire
Check CABI Upper Wiring - Short or Open Wire
Check Short/Open at MAIN PCB Panel Lamp Circuit
There are no buttons
being pressed
continuously.
Yes
The trouble continues
with PCB being
removed
Yes
When PANEL-PCB is
being replaced, it
works normal.
No
Check Fridge Door Wire - Short or Open Wire
Check CABI Upper Wiring - Short or Open Wire
Check Short/Open at MAIN PCB Panel Communication/Power-Supply Circuit
61
No
Re-insert Connector,
Correct the defective contact
No
Re-insert MAIN PCB Connector
No
Re-insert Connector,
Correct the defective contact
Yes
Defective PANEL PCB
Being Pressed
Re-assemble PCB ASS'Y, Correct
any restrictions on the buttons
When being separated, it works
Re-assemble PCB ASS'Y, Correct
any restrictions on the buttons
Yes
Defective PANEL PCB