Samsung RSG257AARS/XAA - 4-2-1) When Power Is Not Supplied

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MMAAIINN PPBBAA ooppeerraatteess aatt 223300
VVAACC && 330000 VVDDCC((oorr 111155 VVAACC
aanndd 116600 VVDDCC)).. PPlleeaassee ttaakkee
ccaarree ooff yyoouurrsseellff dduurriinngg tthhee
rreeppaaiirr aanndd mmeeaassuurreemmeenntt..
223300 VVAACC ddeessccrriibbeedd iinn tthhiiss
mmaannuuaall ddeeppeennddss oonn iinnppuutt
ppoowweerr ssuuppppllyy vvoollttaaggee..
- Check Panel PBA Connector
- Check the connection at the
Upper Hinge Cabi-Door
- Check the Door Panel PCB
connections
- When checking MAIN PBA, refer to
the Operation Description and the
Reference sections in this manual.
Start
Normal
Check the wire connection
and connector
NO
Replace Fuse: 250V 2A
YES
Check PBA pattern &
Replace BD1
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
Replac relevant relays or PBA
ASS’Y
NO
Replace MAIN PBA
NO
NO
YES
NO
YES
YES
YES
YES
YES
YES
YES
TROUBLE SHOOTING
4-2-1) When power is not supplied
NNoottee
The voltage between
CN70 #1 & #3 is about
230 VAC(or 115V).
The fuse on the
MAIN PBA is blown.
The voltage
across BD1 is about 300
VDC(or 160).
The voltage
between C & S pin of TOP246YN 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?
67
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