Samsung RF265AB Service Manual page 67

TROUBLESHOOTING
4-2-8. If Panel PCB does not work normally
When lighting of Panel PCB is disabled or only some LED Lamp are disabled
Be careful to repair because display of this model is installed in the MICOM of internal PCB.
It is recommend to replace PCB MAIN after checking except specified solder touch.
Refer to electronic circuit
diagram in the manual or
circuit diagram on the back
side of the appliance
If Panel PCB KEY is not selected
If it is not repaired with using the basic checking method as above
Check the wires of Top Table Panel - disconnection, short between wires.
Check the wires of fresh food compartment upper cabinet - disconnection, short between wires.
Check the short/open of the panel communication and power supply circuit in MAIN PCB.
Start
Is the connector of
upper hinge cover
inserted correctly?
Is MAIN PCB
connector (CN50)
inserted correctly?
Is Top Table
Panel PCB connector
inserted correctly?
Is lighting operate
normally when replace
Panel-PCB?
Check the wire of Top Table Panel - disconnection, short between wires
Check the wires between fresh food compartment upper cabinet - MAIN PCB - disconnection, short between wires
Are one or more keys
pressed continuously?
Is the PCB system
still operated by separating
of the mechanism?
Is the lighting operated
normally when replace the
Panel-PCB ?
68
Reinsert connector,
Repair bad contact
Reinsert connector of MAIN PCB
Reinsert connector,
Repair bad contact
Panel PCB itself has trouble.
Reassemble the PCB ASS'Y /
Enforce the cancelation of pressed keys
Reassemble the PCB ASS'Y /
Enforce the cancelation of pressed keys
Panel PCB itself has trouble.