Toshiba D-VR41KF Service Manual page 24

2 DVD Section
FLOW CHART NO.1
The key operation is not functioning.
Are the contact point and the installation state of
the key switches normal?
Is the control voltage normally inputted into Pin(8)
of IC501?
Replace IC501 or DVD MECHANISM & DVD
MAIN BOARD ASSEMBLY.
FLOW CHART NO.2
No DVD operation is possible from the remote control unit. (Operation is possible from the unit.)
Is 5V voltage supplied to Pin(3) terminal of the
RM1501 (remote control receiver)?
Is the "L" pulse sent out from Pin(1) terminal of the
RM1501 (remote control receiver) when the remote
control unit is activated?
Is the "L" pulse signal supplied to Pin(14) of
IC501?
Replace IC501 or DVD MECHANISM & DVD
MAIN BOARD ASSEMBLY.
FLOW CHART NO.3
The [No Disc] indication.
Both picture and sound do not operate normally.
Replace the DVD MECHANISM & DVD MAIN
BOARD ASSEMBLY.
Yes
Yes
Yes
Yes
Yes
No
Re-install the key switches correctly or replace
the poor switch.
No
Check the key switches and their periphery, and
service it if defective.
Terminal voltage of IC501-7,8
4.30
3.60
2.90
2.39
1.98
1.61
1.27
0.92
0.51
(V)
No
Check AL+5V line, and service it if defective.
No
Replace the RM1501 (remote control receiver).
Replace remote control unit if needed.
No
Check the line between the RM1501 (remote
control receiver) and Pin(14) of IC501, and
service it if defective.
1-10-4
KEY-2
IC501-8
SENS-
INH
-----
DUBBING
DVD REC
/OTR
OPEN/
CLOSE
-----
DVD
PLAY
-----
DVD
STOP
E9BA1TR