Toshiba DVR19DTKB2 Service Manual page 29

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 P1(AV ASSEMBLY) or P2(DVD MECHANISM
& DVD MAIN BOARD ASSEMBLY).
FLOW CHART NO.2
No DVD operation is possible from the remote control. (Operation is possible from the unit.)
Is 5V voltage supplied to Pin(3) terminal of the RS1501
(remote control receiver)?
Is the "L" pulse sent out from Pin(1) terminal of the
RS1501 (remote control receiver) when the remote
control is activated?
Is the "L" pulse signal supplied to Pin(14) of IC501?
Replace P1(AV ASSEMBLY) or P2(DVD MECHANISM
& DVD MAIN BOARD ASSEMBLY).
Yes
Yes
Yes
Yes
Yes
No
Re-install the key switches correctly or replace
P4(PW/SW ASSEMBLY).
No
Check the key switches and their periphery, and replace
P4(PW/SW ASSEMBLY) if defective.
Terminal voltage of IC501-8
4.30
3.60
2.90
2.39
1.98
1.61
1.27
0.92
0.51
(V)
No
Check SYS+5V line, and replace P1(AV ASSEMBLY)
or P4(PW/SW ASSEMBLY) if defective.
No
Replace P1(AV ASSEMBLY) or remote control(X1).
Check the line between the RS1501 (remote
No
control receiver) and Pin(14) of IC501, and replace
P1(AV ASSEMBLY) if defective.
1-11-6
KEY-2
IC501-8
DUBBING
OPEN
/CLOSE
SELECT
DVD
-STOP
DVD
-P LAY
DVD
-REC
E9TK3TR