TROUBLE SHOOTING
1. No Picture (sound ok)
Check MAIN R118 Waveform
CVBS Signal? (2Vpp)
YES
NO
Waveform of Digital Board IC001 #191?
YES
Waveform of Digital Board IC500 R/G/B/VM OUT0~#65~68?
YES
Waveform of Digital Board IC500 #41, 42, 43, 44?
YES
Waveform of Digital Board P500 #R/G/B_OUT?
YES
Waveform of CPT socket cathode (RK/GK/BK)?
NO
Check Q003
NO
NO
NO
NO
Check Tuner(TU101) VIDEO output
Check around IC500
Check around IC500
Check around Q505, Q506, Q507
Check IC901G
2. No Sound (picture ok)
<AV1, 2, 3, Component 1 INPUT> |
|
|
| <RF> | |||||||
|
|
|
|
|
|
|
| ||||
Waveform of Digital Board | NO |
|
|
| Waveform of MAIN1 | ||||||
|
| ||||||||||
IC001#9, 10, 11, 12, 13, 14(av1, |
|
| Check around |
| Tuner SIF? | ||||||
2, 3) R598, R599(Component1) |
|
|
| each Jack |
|
|
|
|
| ||
|
|
|
| YES |
|
| |||||
at each Mode? |
|
|
|
|
|
|
| ||||
|
| ||||||||||
|
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
| Waveform of Digital | |||
|
| YES |
|
|
| IC001#31? | |||||
|
|
|
|
|
|
|
|
| |||
|
|
|
| NO |
|
|
|
|
|
| YES |
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
| |
Waveform of Digital Board IC001 |
|
| Check around IC001 |
|
|
| |||||
|
|
|
|
| |||||||
#27, 28? |
|
|
|
|
| & Q004, Q005 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
| YES |
|
|
|
|
|
|
| ||
|
|
|
| YES |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| NO |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Waveform of MAIN IC652#1,2(L) |
|
|
|
|
|
|
|
| |||
|
| Check around IC652 |
|
|
| ||||||
14, 15(R)? |
|
|
|
|
| ||||||
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
|
|
|
|
|
|
NO
NO
Check around TU101
Check around IC001
- 17 -