Akai PDP4294LV1, Service Manual

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PCB failure analysis
1. CONTROL: a. Abnormal noise on screen. b. No picture.
2. MAIN (VIDEO): 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.
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. Audio Bard: a. No voice. (Make sure status: Mute / Internal, External speaker)
b. Noise
7. Y/Z - Sustainer: The component working temperature is about 55
o
C.
If the temperature rises abnormal, this may be a error point.