Akai PDP4273M Service Manual page 34

PCB failure analysis
1. CONTROL :
2. MAIN (video) :
3. POWER : No picture, no power output.
4. Z - Sustainer : a. No picture.
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) .
a. Abnormal noise on screen. b. No picture.
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. Color not enough.
c. Flash on screen.
b. Noise.
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