If Pantry Panel Pcb Is Not Working Normally - Samsung RF28HDEDBSR Service Manual

TROUBLESHOOTING

4-2-11. If Pantry Panel PCB is not working normally

You should check the display after door opening because the display of this model operates only
when the fresh food compartment door is opened.
If Panel Key is not
selected
② If Panel PCB Key is not selected
PCB Typical Ground J23 JUMMPER
The Voltage of KEY is
Working every 2msec/4min
☞ Checking method of voltage Based on PCB typical
Ground J23 JUMMPER
1) Key voltage ; CN51-"11"(Sky Blue)
a) Working: 2V±0.5V b) Normal: 0V
Start
room
Does R
Door switch
operate normally?
Is the
pantry room
connector of
inserted correctly
Is MAIN PCB
Connector (CN51) inserted
correctly?
Is signal of MAIN
PCB CN51 normal?
Is the lighting
operated when replace Pantry
Panel-PCB?
① Check the wires of Pantry Room - disconnection, short between wires
② Recheck the control circuit of MAIN PCB Pantry Panel
③ Check the wire assembling between Panel and MAIN
※ If it is not repaired with the above basic checking method
still operated by separating
outputted from MAIN PCB IC51
① Check the wire of Pantry Room - disconnection, short between
wires
② Check the short/open of the pantry panel lighting circuit in
MAIN PCB.
* Refer to <how to repair door switch>
Reinsert Connector, Repair bad contact
Reinsert connector in MAIN PCB
Check voltage/Replace MAIN PCB
Panel PCB itself has trouble.
Is a key pressed
continuously?
Is the PCB system
of the mechanism?
Is the lighting operated
after replacing the Pantry
Panel-PCB?
Is a normal vol t age
duri n g the key operati n g?
94
Check and repair the switch
Reassemble PCB ASS'Y / Enforce
the cancelation of pressed keys
Reassemble PCB ASS'Y /
Enforce the cancelation of pressed
keys
Convertible compartment Panel
PCB itself has trouble.
① Replace MAIN PCB
② Check the short of MAIN
Panel wire