Specifications

5. Trouble Shooting Guide
DHC-XD350
12
1. Basic Operating
Is STANDBY LED on?
Push power on.
Is POWER on?
Does initial read work
Turn Power on.
Does it play?
Does it output audio?
OK
Yes
Yes
Yes
Yes
Yes
Yes
Check AUDIO circuit.
No
Check tracking SERVO
circuit.
No
Check LASER circuit.
Check focus circuit.
Check disc.
Check protect circuit.
No
Check power supply circuit.
No
Check POWER SUPPLY
circuit.
Check connection
CN703, WC700.
No
2. Front Micom Circuit
Replace IC703
Yes
Check if IC703
Pin24, 98
is High(+5.0V) ?
Check +5.0V line.
Check if IC703
Pin18
is High ?
Check Power down line.
Check if IC703
Pin6, 7, 8
is High ?
Yes
Check Protection circuit.
No
No
No
Yes
Yes
1
Does DVD appear
at VFD ?
Push power on.
Does loading appear
at VFD ?
Yes
Does no DISC or
time appear at VFD ?
Yes
Check if DVD an Audio
Micom Interface is OK.
Yes
Check from Micom
to DVD Interface
Check Power
Check Loader.
Check MPEG PCB
Yes
Check Power Supply circuit
No
No
No
Check power
supply circuit
of Regulator PCB
Yes
Refer to Power Supply
Circuit.
Check Oscillator of
XC700
Yes
Replace XC700
Check if IC703 Pin5
is work ?
Yes
Check DVD Reset control
Check if
Connector CW704 Pin1
to 6 are work ?
Yes
No
No
No
No
No
1
Check connector
WC701 if it normaly?
Check MPEG PCB
Yes
No
Recheck it
-. Audio Part