Toshiba RD-XV45KE Service Manual page 27

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(1,2) of IC1504?
Replace IC1504 or DVD MECHANISM & DVD
MAIN BOARD ASSEMBLY.
FLOW CHART NO.2
No HDD/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(27) of
IC1504?
Replace IC1504 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 IC1504-1,2
2.80
2.39
1.98
1.56
1.14
0.67
0.21
(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(27) of IC1504, and
service it if defective.
1-11-4
KEY-1 KEY-2
IC1504-1 IC1504-2
OPEN/
-----
CLOSE
----- VCR
VCR>DVD HDD
HDD>DVD DVD
HDD/DVD
CH UP
STOP
CH
HDD/DVD
PLAY
DOWN
HDD/DVD
POWER
REC
E439ATR