Toshiba rd-xv48dtkb Service Manual page 31

2 HDD/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/HDD MAIN BOARD ASSEMBLY).
FLOW CHART NO.2
No HDD/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/HDD MAIN BOARD ASSEMBLY).
FLOW CHART NO.3
The [No Disc] indication.
Both picture and sound do not operate normally.
Replace the P2(DVD MECHANISM & DVD/HDD MAIN
BOARD ASSEMBLY).
Yes
Yes
Yes
Yes
Yes
No
Re-install the key switches correctly or replace
P3(PW/SW ASSEMBLY).
No
Check the key switches and their periphery, and replace
P3(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 AL+5V line, and replace P1(AV 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-1
IC501-8
HDD>DVD
VCR>DVD
OPEN
/CLOSE
VCR
HDD
DVD
HDD/DVD
-STOP
HDD/DVD
-PLAY
HDD/DVD
-REC
E3NG1TR