22
Abnormal Display
No Sound
Check TV system setup
Reset source
NG
Replace the filter or resistance
RF signal
Check Tuner
Replace Tuner
Check LVDS cable
Check input
Replace LVDS cable
Check panel
Replace panel
OK
OK
NG
OK
OK
NG
OK
OK
NG
OK
Check the source
Reset source
NG
OK
Check input signal
TV SIF
Check TV
system
Reset TV system
NG
Check TU100
NG
Change TU100
Check U400
OK
OK
Change U400
NG
Check U603
OK
NG
Change U603
Check speaker
NG
Change speaker
Check if mute
OK
Check signal filter circuit
Check the source
OK
Summary of Contents for L42A9
Page 4: ...4 1 General Specification ...
Page 19: ...19 4 Remove the AC socket ass y speakers and BKT ...
Page 20: ...20 5 Remove the rest BKT and separate panel and bezel ...
Page 25: ...25 6 PCB Layout 6 1 Main Board 715G3639M01000004K ...
Page 26: ...26 ...
Page 27: ...27 6 2 Power Board 715G3351P01W20003S ...
Page 28: ...28 ...
Page 29: ...29 ...
Page 30: ...30 6 3 Inverter Board 715G3358 1 ...
Page 31: ...31 6 4 IO Board 715G3481 1 ...
Page 32: ...32 6 5 Key Board 715G3513K01000001S 6 6 IR Board 715G3666R01000004F ...
Page 58: ...58 11 Exploded View ...