Samsung RM255BABB, RM255BASB If the panel PCB is not working normally, Diagnostic, It is a care

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. Start

See the electric circuit		Is the connector on upper		NO
diagram or connection		hinge cover of freezer inserted
diagram attached to the		normally?
backside of refrigerator.			YES		Reinsert the connector.
		Is the main PCB		NO	Troubleshoot contact failure.
		connector(CN50) inserted
		normally?
			YES		Reinsert the connector into the
					main PCB.
		Is the connector on door panel		NO
	It is a care.	PCB inserted	normally?
		YES		Reinsert the connector.
				YES	Troubleshoot contact failure.
		Do lights operate normally
		when replacing panel PCB?

NO

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.

Panel PCB itself has trouble.

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.

YES

Is the locking lamp lit?

NO

Are more than one key pressed

continuously?

Pressed

Recheck after releasing the locking

function.

NO

Is the PCB system

still operating even though it is

separated?

YES

Does lighting operated normally when replacing panel-PCB?

Operating when

disassembled Reassemble the PCB assy/Enforce the cancellation of pressed keys.

	Reassemble the PCB asse/Enforce
YES	the cancellation of pressed keys.

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.

Panel PCB has trouble for in itself.

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