1-4-1
HC2C0PFS
PREPARATION FOR SERVICING
How to Enter the Service Mode
About Optical Sensors
Caution:
An optical sensor system is used for the Tape Start
and End Sensors on this equipment. Carefully read
and follow the instructions below. Otherwise the unit
may operate erratically.
What to do for preparation
Insert a tape into the Deck Mechanism Assembly and
press the PLAY button. The tape will be loaded into
the Deck Mechanism Assembly. Make sure the power
is on, TP507 (SENSOR INHIBITION) to GND. This will
stop the function of Tape Start Sensor, Tape End Sen-
sor and Reel Sensors. (If these TPs are connected
before plugging in the unit, the function of the sensors
will stay valid.) See Fig. 1.
Note: Because the Tape End Sensors are inactive, do
not run a tape all the way to the start or the end of the
tape to avoid tape damage.
About REC-Safety Switch
Caution:
The REC-Safety Switch is directly mounted on the
Main CBA. When the Deck Mechanism Assembly is
removed from the Main CBA for servicing, this switch
does not work automatically.
What to do for preparation
In order to record, press the Rec button while pushing
REC-SAFETY SW on the Main CBA. See Fig. 1.
TP507
S-INH
SW506
Q504
Q503
(REC-SAFETY SW)
Fig. 1
Summary of Contents for VCR425
Page 22: ...1 8 6 1 8 7 1 8 8 HC341SCM2 Main 2 4 Schematic Diagram...
Page 23: ...1 8 9 1 8 10 1 8 11 HC341SCM3 Main 3 4 Schematic Diagram...
Page 25: ...Jack Schematic Diagram 1 8 15 1 8 16 HC341SCJ...
Page 26: ...1 8 17 1 8 18 Function Schematic Diagram HC341SCF...
Page 29: ...Jack CBA Top View Jack CBA Bottom View BHC400F01018 E 1 8 25 1 8 26...
Page 30: ...Function CBA Top View Function CBA Bottom View 1 8 27 1 8 28 BHC400F01018 B...
Page 49: ...2 4 6 U25PALDA S 12 19 Cap Belt Fig DM11 Fig DM12 20 C 1 21...
Page 55: ...3 1 1 HC341FEX A1X EXPLODED VIEWS Front Panel...
Page 74: ...VCR425 HC341ED...
