5. Trouble Shooting Guide
-. Audio Part
DHC-X200/X250
1. Basic Operating2. Front Micom Circuit
Push power on.Push power on.
Does DVD appearNo
Is STANDBY LED on?Noat VFD ?
Check POWER SUPPLY
circuit.
YesCheck connection CN906.YesDoes Video1/2,MD/TAPE, TV, FM 87.5kHz
appear at VFD ?
Turn Power on.Does loading appear
at VFD ?Yes
Yes
OK
Yes
Is POWER on?No
No
Does no DISC orNo
time appear at VFD ?
Check power supply circuit.
YesNo
Yes
Does initial read workNoCheck if DVD an Audio Micom
Interface is OK.
Check LASER circuit.
Check focus circuit.
YesCheck disc.Does it not appearNo
Check protect circuit.DVD Display at VFD ?
Does it play?NoDoes it apear PCMNo
96kHz Stereo at VFD ?
Check tracking SERVO
circuit.
YesYes
Check PowerNo
Yes
Check Connector
Does it output audio?NoNo(CP901,CP903) if is
normally.Yes
Reconnect it.Check Loader.Check MPEG PCBCheck Power Supply circuit
Yes
OKCheck AUDIO circuit.Check connectorNo1
CN901 if is normally
Yes
Reconnect it.
Yes
YesCheck if IC904 Pin38
No
is HIGH ?
Check IC904 reset waveformCheck power supply
circuit of Main PCBNoNo
Refer to Power Supply Circuit.
YesCheck if IC904 Pin44No
is High(+5.0V) ?
Check +5.0V line.
Check Oscillator of X901NoNo
Replace X901
YesCheck if IC904 Pin4
is Low(0 V) ?No
Check Power down line.
Check if IC401 Pin65
is work ?NoNo
Check DVD Reset control
YesCheck if IC904 Pin18
is High ?No
Check if ConnectorNo
CN901 Pin4 is work ?
Yes
YesCheck from MicomReplace IC904Check Protection circuit.
to DVD Interface
1
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ACEC
