RCA L15D20, Service Manual

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19
’’ LCD TV Color Monitor RCA L19WD20
21
6. Repair Flow Chart
1. No Power (No LED indicator)
2. Can not start (LED indicator yellow)
NG
Repair the key board
OK
Check 12V_SB
NG
Return to “1”
OK
Check PWR_ON signal
NG
Check U905, Q906, 0907
NG
Replace U905 or Q906 or Q907
Check I
2
C communication
OK
Check RELAY-SW signal
NG
Replace Q910, Q912
Check U401, U404
NG
Replace U401 or U404
OK
OK
Check main board power supply part
Check key board
OK
Check I
2
C communication
NG
Check power cord and board interface
Plug in power cord and interface
OK
Check F901, BD901, C904
NG
Replace F901 or BD901 or C904
OK
Check IC901, Q902
Check IC903, IC904
NG
Replace IC901 or Q902
OK
Check T901
OK
Replace T901
Replace IC903 or IC904
OK
NG
NG
Check ZD902
NG
Replace ZD902