Mechanical Adjustments; Checking The Play Operation; Adjusting The Pause Timing - Marantz SUPERSCOPE CRS-2104 Manual

CRS-2104
5. MECHANICAL ADJUSTMENTS
PRECAUTIONS: Prior to any adjustments, clean the head slits with soft cloth or cotton swab moistened with denatured
alcohol or carbon tetrachloride, and fully demagnetize the head, capstan and similar parts.
5.1 CHECKING THE PLAY OPERATION
5.1.1 CHECKING THE PLAY TIMING
It is normal that when the PLAY pushbutton is depress-
ed, the take-up reel table turns first, then the pinch rol-
ler is rotated. The reel table and pinch roller must not
start turning at the same time.
NOTE:
Make certain that such a subsequent operation is mode
irrespective of locking state is depressed slowly without
loading the tape.
Slowly depress the PLAY pushbutton, and the take-up
reel table will start turning. At that time, check to make
certain that a clearance between the pinch roller and
capstan is less than 0.5 mm.
5.2 ADJUSTING THE PAUSE TIMING
Set the recorder in the playback mode. Depress the
PAUSE pushbutton slowly, and the take-up reel will
pause. As that time, check to ensure that a clearance be-
tween the pinch roller and ranges from 0.2 to 0.5 mm. If
out of the range, adjust a bending angle of the pinch
roller bracket arm (part A).
NOTE:
To increase a clearance between the pinch roller and
capstan, decrease the angle (in the direction C). To de-
crease the clearance, increase the angle (in the direction
B).
5.3 ADJUSTING THE FAST FORWARD AND REWIND
TORQUE
Set the extended parts (B in the figure) of the torque
adjustment leaf spring (A in the figure) of the FF/REW
idler on any one of three stepping parts of the idler.
NOTE:
To increase torque, set the extended parts to the step-
ping part of "INCREASE" and to decrease it, set those
to the stepping part of ''DECREASE".
Adjusting range: 70 to 110 g-cm
5.1.2 ADJUSTING THE PLAY TIMING
If out of specification, bend the part of the pinch roller
bracket which faces the head chassis stopper. In the
figure shown, bend the part in the direction of A to de-
crease the clearance. To increase the clearance, bend the
part in the direction of B.
0.2~0,5mm t
CAPSTAN SHAFT
PINCH ROLLER
* HEAD CHASSIS STOPPER
NOTE:
After adjustment, check to be sure that the pinch roller
bracket does not contact the head chassis stopper in
PLAY mode.
INCREASE DECREASE
A ret
WII