3. VCR Section
FLOW CHART NO.1
The key operation is not functioning.
No
Are the contact point and the installation state of Re-install some key switches correctly or
the key switches normal?replace some key switches.
Yes
NoCheck the key switches and their periphery, and
Is the control voltage normally inputted into
Pins(7,8) of IC501?service it if defective.
Yes
KEY-1KEY-2
Replace IC501.Terminal voltage of IC501-7,8
IC501-7IC501-8
4.30
----------
3.60
----------
2.90
----------
2.39
CH
-----
DOWN
1.98
SENS-
CH UP
INH
1.61
-----FF
1.27
OUTPUT
REW
SELECT
0.92
POWERPLAY
0.51
STOP
(V)REC/OTR
/EJECT
FLOW CHART NO.2
No VCR operation is possible from the remote control unit. (Operation is possible from the unit.)
No
Is 5V voltage supplied to the Pin(3) terminal ofCheck AL+5V line and service it if defective.
the RM2001 (remote control receiver)?
Yes
No
Is the "L" pulse sent out from Pin(1) terminal of Replace the RM2001 (remote control receiver).
the RM2001 (remote control receiver) when the Replace remote control unit if need.
remote control unit is activated?
Yes
No
Is the "L" pulse signal supplied to the Pin(14) of Check the line between the RM2001 (remote
IC501?control receiver) and the Pin(14) of IC501, and
Yesservice it if defective.
Replace IC501.
1-11-10H9941TS |
ACEC
