Repair Flow Chart - Hitachi 19LD4550U Service Manual

19"LCD TV

5. Repair Flow Chart

1. No Power (No LED indicator)
Check power cord and board interface
OK
Check F901, BD901, C905
OK
Check IC901, Q901
OK
Check T901
OK
Check D904, D906
OK
Check ZD920
2. Can not start
Check keyboard
OK
Check 5V_SB
OK
2
Check I C communication
OK
Check oscillistor
NG
NG
NG
Replace T901
NG
NG
Replace ZD920
Can't start
NG
NG
NG
NG
Plug in power cord and interface
Replace F901 or BD901 or C905
Replace IC901 or Q901
Replace D904 or D906
Repair the keyboard
Check every chip power supply
2
Replace I C communication component
NG
Replace oscillistor
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Hitachi 19LD4550U