Troubleshooting - FUNAI B4-M500 Service Manual

FLOW CHART NO.1
The power cannot be turned on.
With the AC adapter connected to the set, is 12V
voltage supplied from AC adapter?
Is 12V voltage supplied to Pin(9) of CN6201?
Is 3.3V voltage supplied to Pin(2) of CN2001 on the
T-Sensor CBA?
Is operation (POWER, PLAY, STOP, EJECT)
possible from the unit?
Is operation (POWER, PLAY, STOP, EJECT)
possible from the remote control unit?
Replace the BD Loader Unit.
FLOW CHART NO.2
The key operation is not functioning.
Does the LED on the T-Sensor CBA light up when
turning the power on?
Does the LED on the T-Sensor CBA light brightly
when pressing each switches (POWER, PLAY,
STOP, EJECT)?
Replace the BD Loader Unit.

TROUBLESHOOTING

Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Replace the AC adapter.
No
Check if the pattern between JK8001 and CN6201 is
shorted.
Yes
Replace the BD Loader
Unit.
No
Replace the BD Loader Unit.
No
See Flow Chart No.2 <The key operation is not
functioning.>
No
See Flow Chart No.3 <No operation is possible from
the remote control unit.(Operation is possible from
the unit.)>
No
Is 5V voltage supplied to Pin(1) of CN2001?
Yes
Is 3.3V voltage supplied to Pin(2) of CN2001?
Yes
Replace IC2001.
No
Is 3.3V voltage supplied to Pin(2) of CN2001?
Yes
Replace IC2001.
1-10-1
No
Replace the Jack CBA
Unit.
No
Repalce the BD Loader Unit.
No
Repalce the BD Loader Unit.
No
Repalce the BD Loader Unit.
ECB91TR