6-6) If The Panel Pcb Is Not Working Normally - Samsung RS265 LAWP Service Manual

6. TROUBLESHOOTING

6-6) If the panel PCB is not working normally

1) Where lighting of the panel PCB is disabled, or only some lamps are disabled.
See Ref. 1: 'View of the
connection cabinet-door
for the wire assembly' in
the manual.
2) Where the Panel PCB key isn't selected:
- The basic check way : If you are troubleshooting in the basic check method, then
Refer to the description of
circuit operation in the
manual 8-6) Key scan and
display Circuit selection's,
and measure the wave
pattern.(page 35)
of upper hinge cover inserted
connector(CN50) inserted
Is the connector of
door panel PCB connector inserted
Is lighting operated
normally when the exchange of panel
1. Check the door wire of freezer – the breaking of wire, short between wires.
2. Check the CABI wire of freezer – the breaking of wire, short between wires.
3. Check the Panel Lighting Circuit section within the main PCB for Short Open.
Is the locking lamp lit on?
Aren't a key or more buttons
pressed continuously?
Isn't the PCB system
still operated by seperating of the
operated normally in the exchange
wave form outputted from the main
1. Check the door wire of freezer – check the breaking of wire, short between wires.
2. Check the CABI wire of freezer – check the breaking of wire, short between wires.
3. Check for Short/Open of the Panel Lighting Circuit section in the main PCB.
Start
NO
Is the connector
normally?
YES
Is the main PCB
NO
normally?
YES
NO
normally?
YES
YES
PCB?
NO
YES
NO
NO
Operated by
YES
separation
mechanism?
YES
Is lighting
YES
of panel-PCB?
NO
Is a periodic
NO
PCB IC9?
YES
58
Reinsert the connector. Troubleshoot
a poor contact.
Reinsert the connector in the main
PCB.
Reinsert the connector. Troubleshoot
a poor contact.
Panel PCB itself has trouble.
Recheck after the cancel of locking
function.
Reassemble the PCB ass'y/Enforce
the cancellation of pressed keys.
Reassemble the PCB ass'y/Enforce
the cancellation of pressed keys.
Panel PCB has trouble for itself.
1. Replace the main PCB.
2. Check the wires of CoolSelect Zone
panel for Short.
TM