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WSS
3-8-3: Pinch roller solenoid drive circuit
See Fig. 3-16.
The pinch roller solenoid drive-circuit operates
basically in the same manner as the Fast sole-
noid
drive circuit.
The difference
is that the
CONTROLLER
ugi3
a
RR CR
A
M A R T E
RA NE RRS
iC
controller supplies a control signal from pin 11
to the base of transistor Q908
to tum it on.
When it is on, one end of the pinch roller sole-
noid gets groundad.
As the timing diagram shows, the pinch roller
solenoid control signal is output with a delay of
450—550 msec to the head base solenoid contro!
signal. This permits the tape to start traveling
after the head base had moved completely to its
position and the head has come into close con-
tact with the tape.
,
3-9. REEL MOTOR DRIVE CIRCUIT
3-9-1. Oirection of motor rotation
The reel motor drives the left or right reel disk
to take up the tape. Torque is. transmitted. from:
the reel motor to one of the reel disks during the
reproduce,
fast-forward,
and rewind
modes: by
"the--processesshown-in
Fig: 3-17
— 3:19 ~{as
seen from the front of the deck). As seen from
Fig. 3-17 and 3-19, the reel-moter rotates-in-the
same direction during the reproduce and rewind
modes and the fast-fonvard.pulley mechanically
selects either the léft or right reel disk and drives
it in accordance with the direction of reel motor
-rotation.-in-the-pause-mede, the reel -motor-does
not rotate.
Fig. 3-16.
Pinch roller solenoid drive circuit
20
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