Akai PDP4210EA1, Service Manual

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Basic operation of Plasma Display
1. After turning on power switch, power board sends 5Vst-by Volt to Main
IC MT820
2
waiting for ON signals from Key Switch or Remote Receiver.
2. When the ON signal from Key Switch or Remote Receiver is detected, MT820
2
will send
ON Control signals to Power. Then Power sends (5Vsc, 9Vsc, 12Vsc, 24V and RLY
ON, Vs ON) to PCBs working. This time
CONTROL
Board
will send signals to display
back light,
OSD on the panel and start to search available signal sources. If the audio
signals
input, them will be amplified by Audio AMP and transmitted to Speakers.
3. If some abnormal signals are detected (for example: over volts, over current, over
temperature and under volts), the system will be shut down by Power off.