Akai PDP4273MN Service Manual page 36

Basic operation of Plasma Display
1. After turning on power switch, PSU board sends 5Vst-by Volt to Main
IC MT8202 waiting for ON signals from Key Switch or Remote Receiver.
2. When the ON signal from Key Switch or Remote Receiver is detected, MT8202 will send
ON Control signals to Power. Then Sub PSU sends 5Vsc, 9Vsc, 24V to PCBs working.
This time Logic Board will send signals to Panel by X/Y SUS Board, OSD on the panel
and display available signal. 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.
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