Samsung RS 24 Service Manual page 54

Diagnostics
10-8) If CoolSelect Zone TM isn't operated normally (Optional)
1) If the lamp of CoolSelect Zone
If the Panel key isn' t selected:
1.Check the wires of CoolSelect Zone
2. Check the Lighting Circuit of CoolSelect Zone
3. Check the main PCB of CoolSelect Zone
the panel and main PCB.
2) If the Panel PCB key isn't selected:
- The basic method is applied to check – if you fail in troubleshooting after above the execution, then
Refer to 8-7) CoolSelect Zone
Panel Circuit and measure the
wave form.
1. Check the wires of CoolSelect Zone
2. Check Short/Open the Lighting Circuit section of CoolSelect Zone
3. Check the short of main PCB in CoolSelect Zone
TM is not lit.
Start
Is the connector of
CoolSelect Zone inserted correctly
TM
in the refrigerator?
YES
Is the connector of main
PCB (CN51) inserted correctly?
YES
Is the connector of
CoolSelect Zone TM panel PCB
inserted ?
YES
Is lighting operated
normally in the exchange of CoolSelect Zone
panel PCB?
NO
TM – check the disconnection of wire, short between wires.
TM panel in the main PCB for Short/Open.
TM assembly for Short; the wire assembly state between
Aren't a key or more pressed
continuously?
YES
Isn't the PCB system
still operated by separation?
YES
Is lighting operated
normally after the exchange of
panel-PCB?
NO
TM ,
Is a periodical wave
form outputted from the main
PCB IC9?
YES
TM – check the disconnection of wire, short between wires.
TM . Check the wire assembly
54
NO
Reinsert the connector; troubleshoot
NO
Reinsert the connector in the main
NO
Reinsert the connector; troubleshoot
YES
TM
Panel PCB has trouble for itself.
NO
Reassemble the PCB ass'y/Enforce
the cancellation of pressed keys
NO
Reassemble the PCB asswmbly and
Enforce the cancellation of pressed keys
YES
Panel PCB has trouble for itself.
NO
1. Replace the main PCB.
2. Check the wire shorts of CoolSelect
Zone
panel in the main PCB.
TM
a bad contact.
PCB.
a bad contact.
TM panel.