
29
1. Abnormal mode detect
1-1.
Abnormal mode detect for PC Source
Is a input
H-sync of ADC(pin 90,
U12) correct?
Abnormal mode
detect
No
No
Yes
Yes
Is waveform
of clock of ADC(pin 49,
U12) correct?
Trouble in the H-sync
input circuit.
Trouble
in ADC.
Trouble
in Scaler(U9).
Yes
TROUBLESHOOTING HINTS (L520BAV)
Summary of Contents for L520B
Page 36: ...34 5 No Video ...
Page 42: ...40 TDA 8752 Section SCHEMATIC DIAGRAM ...
Page 43: ...DVI Receiver Section 41 ...
Page 44: ...Video Decoder Section 42 ...
Page 45: ...Micro Controller Section 43 ...
Page 46: ...ASI 310 Section 44 ...
Page 47: ...LCD Panel Interface Section 45 ...
Page 48: ...Power Distribution Section 46 ...
Page 49: ...Jack PCB Section 47 ...
Page 50: ...Key and TV Tuner Section 48 ...
Page 51: ...EXPLODED VIEW MECHANICAL PARTS LIST 49 ...
Page 72: ......