Samsung RM255BABB Training Manual page 67

DIAGNOSTIC
6-6) If the panel PCB is not working normally:
1) Where all lights of the panel PCB are disabled, or only some lamps are disabled.
See the electric circuit
diagram or connection
diagram attached to the
backside of refrigerator.
It is a care.
1. Check the door wire of freezer – breaking of wire, short between wires.
2. Check the CABI wire of freezer – breaking of wire, short between wires.
3. Check the panel lighting circuit section within the main PCB for short or open.
2) Where the Panel PCB key isn't selected:
- The basic check way : Please follow the basic check method, and then if it doesn`t work proceed as follows.
Start
Is the connector on upper
hinge cover of freezer inserted
normally?
YES
Is the main PCB
connector(CN50) inserted
normally?
YES
Is the connector on door panel
PCB inserted normally?
YES
Do lights operate normally
when replacing panel PCB?
NO
Is the locking lamp lit?
NO
Are more than one key pressed
continuously?
NO
Is the PCB system
still operating even though it is
separated?
YES
Does lighting operated normally
when replacing panel-PCB?
NO
1. Check door wire of freezer – check breaking of wire, short between wires.
2. Check the CABI wire of freezer – check breaking of wire, short between wires.
3. Check for Short/Open of the Panel Communication / Power Supply parts of main pcb.
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NO
Reinsert the connector.
Troubleshoot contact failure.
NO
Reinsert the connector into the
main PCB.
NO
Reinsert the connector.
Troubleshoot contact failure.
YES
Panel PCB itself has trouble.
YES
Recheck after releasing the locking
function.
Pressed
Operating when
Reassemble the PCB assy/Enforce
disassembled
the cancellation of pressed keys.
Reassemble the PCB asse/Enforce
the cancellation of pressed keys.
YES
Panel PCB has trouble for in itself.