Vcr Section - Toshiba DVR610 - DVDr/ VCR Combo Service Manual

3 VCR 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(86) of IC1501?
Check IC1501 and their periphery, and replace
P1 (BOARD MCV) if defective.
FLOW CHART NO.2
No VCR operation is possible from the remote control unit. (Operation is possible from the unit.)
Is 5V voltage supplied to the 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 unit is activated?
Is the "L" pulse signal supplied to the Pin(5) of
IC1501?
Check IC1501 and their periphery, and replace
P1 (BOARD MCV) if defective.
Yes
Yes
Yes
Yes
Yes
No
Re-install some key switches correctly or
replace P1 (BOARD MCV) if defective.
No
Check the key switches and their periphery, and
replace P1 (BOARD MCV) if defective.
Terminal voltage of IC1501-86
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 (BOARD MCV)
or P3 (BOARD POWER SUPPLY) if defective.
No
Replace P1 (BOARD MCV).
Or replace remote control unit (X1).
No
Check the line between the RS1501 (remote
control receiver) and the Pin(5) of IC1501, and
replace P1 (BOARD MCV) if defective.
1-10-10
KEY-1
IC1501-86
CH
DOWN
CH UP
D/V
OUTPUT
REC
/OTR
FF
REW
PLAY
STOP
/EJECT
POWER
E9KGATR