Operating instructions

37’’ LCD TV RCA L37WD23
22
5. Repair Flow Chart
1. No Power (No LED indicator)
2. Can not start (LED indicator yellow)
NG
Check power cord and board interface
Plug in power cord and interface
OK
Check F901, BD901, C911
NG
Replace F901 or BD901 or C911
OK
Check NR901, C907
Check Q914, IC912,IC901,Q901,Q910，
Q903,Q904
NG
Replace NR901 or C907
OK
Check D900, D916, IC905, Q900
OK
Re
p
lace D900,D916，IC905,Q900
Replace Q914 or IC912, IC901, Q910,
Q903, Q904
OK
NG
NG
Check IC902，Q902
NG
Re
p
lace IC902，Q902
Check D931，D932，D910，IC931
Check D931，D932，D910，IC931
OK
NG
NG
Re
p
air the ke
y
board
OK
Check 5V SB
NG
Return to “1”
OK
Check PWR ON si
g
nal
NG
Check U905
,
Q906
,
Q907
NG
Re
p
lace U905 or Q906 or Q907
Check I
2
C communication
OK
Check RELAY-SW si
g
nal
NG
Re
p
lace Q913
,
Q914
Check U401
,
U404
NG
Re
p
lace U401 or U404
OK
OK
Check main board
p
ower su
pp
l
y
p
art
Check ke
y
board
OK
Check I
2
C communication