4-2-10) When Panel Pcb Operates Abnormally - Samsung RB31FEJNB Series Service Manual

4. TROUBLESHOOTING
4-2-11) When PANEL PCB operates abnormally
① When PANEL PCB does not light up or partially does
- Display Assy Location
1. Internal Type : Top Table
2. External Type : Fridge Door/Top Hinge
When PANEL KEY is
not selected
② When Panel PCB buttons are not working
※ When the trouble is being remained after the above,
Start
The connector on
the Display Panel 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
① Check Fridge Door Wiring - Short or Open Wire
② Check CABI Upper Wiring - Short or Open Wire
③ 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
① Check Fridge Door Wire - Short or Open Wire
② Check CABI Upper Wiring - Short or Open Wire
③ Check Short/Open at MAIN PCB Panel Communication/Power-Supply Circuit
75
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