Samsung RS261M Series - 4-9) no Display and no Operation; 4-9) When Power Is Not Supplied

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Check the wire connection and
connector
- Check Panel PBA Connector
- C heck the connection at the
Upper Hinge Cabi-Door
- Check the Door Panel PCB
connections
4. TROUBLESHOOTING
4-9) No Display and No Operation
SMPS circuit in the MAIN PBA operates at 115VAC &
160VDC(or 230VAC & 300VDC). Please take care of
yourself during the repair nad measurement
The voltage
between CN70 #1 & #3 is about
115V (or230V)
The fuse on the
MAIN PBA is blown.
The voltage
across BD1 is about 160VDC
(or 300)
The Voltage
between C & S pin of TOP246Y
is about 5.8V
The Voltage across
C107 is about 13V
The Voltage across
C109 is about 5V
Does PANEL PBA
operate normally
Do the
components such as the relays
work properly
Is there short-out
soldering on PBA
Start
- When checking MAIN PBA, refer
to the Operating Description and
the Reference sections in this
manual
NO
YES
NO
YES
YES
YES
YES
YES
YES
NO
Replace the fuse
YES
Replace PBA Ass'y
NO
Replace PBA Ass'y
NO
Replace PBA Ass'y
NO
Replace PBA Ass'y
NO
1) Check the connector
2) Replace PANEL PBA
NO
Replace relevant relay or
PBA Ass'y
NO
Replace PBA Ass'y
YES
Normal
Caution!