Akai PDP4216M, Service Manual, Page: 36 / 86

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. X - Extension : Abormal vertical noise on screen.
7. Audio Board or AUX PSU: a. No voice. (Make sure Mute/OFF) .
b. Noise.
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