Sanyo PDP-42XS1 Service Manual

Also see for PDP-42XS1: Operating manual

Contents

233.With picture but no sound:4. A certain channel is abnormal4.1 No picture on AVThe sound power amplifier or peripheralcircuit has problem. Check power supply,if the control of ENABLE pin is normal; ifoutput short-circuited or other problemsthat causes protection to work.Check if the video processing board X110 is output.The sound damaged.Check if the second pin of soundpower amplifier input the signal.Measure if the soundinput of current channelof N101 is normal.Check MSP3440 orperipheral circuits.Check different levels ofcircuit following input audiosignal channel.No YesNoYesNoYesCheck if the C228 hasthe signal input.Check if the pin 2 ofN708 has input signal.Check periphery circuit of N201,crystal and power supplyCheck the periphery circuitof N708 and power supplyCheck the AV terminalsocket to N708 channelYesNoYesNo