1-6-1
E3B90PFS
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 [VCR PLAY] button. The tape will be loaded into
the Deck Mechanism Assembly. Make sure the power
is on, connect J78 to GND. This will stop the function
of Tape Start Sensor, Tape End Sensor and Reel Sen-
sors. (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.
Q504
Q503
J78
Fig. 1
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