Akai PDP4206EM - 42" Plasma EDTV, Service Manual

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Basic operation of Plasma Display
1. After turning on power switch, power board sends 5Vst-by Volt to Micro Processor
IC waiting for ON signals from Key Switch or Remote Receiver.
2. When the ON signal from Key Switch or Remote Receiver is detected, Micro Processor
will send ON Control signals to Power. Then Power sends (5Vsc, 9Vsc, 24V and RLY
ON, Vs ON) to PCBs working. This time VIF 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.