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PCB failure analysis
1. CONTROL:
a. Abnormal noise on screen. b. No picture.
2. MAIN :
3. POWER: No picture, no power output.
4. Z - Sustainer: a. No picture.
b. Color not enough.
c. Flash on screen.
5. Y - Sustainer: Darker picture with signals.
6. Tuner/Audio : a. No voice. (Make sure status: Mute / Internal, External speaker)
7. Y/Z - Sustainer: The component working temperature is about 55o C.
If the temperature rises abnormal, this may be a error point.
8. ATSC: a. No ATSC TV signal
a. Lacking color, Bad color scale.
b. No voice.
c. No picture but with signals output, OSD and back light.
d. Abnormal noise on screen.
b. Noise
c. No ATV signals
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