Advertisement
ADJUSTMENT WASHERC>
ADJUSTMENT WASHER
OJ to 702mm
FLYWHEEL
CAPSTAN SHAFT
Fig. 19
ADJUSTMENT (Refer to Fig. 19)
Insert the various washers in the three places between
the prop and the flywheel hold plate and adjust to
give 0.1 to 0.2 mm loose play when the flywheel is
moved in the direction of the arrows.
. PINCH ROLLER
PRESSURE
MEASUREMENT
(Refer to Fig. 20)
At playback mode, push the pinch roller with a spring
gauge
until
the pinch roller
separates
from
the
capstan by about 1mm
to 2mm
and then gently
Specified Pinch Roller Pressure : 330 + 30 grm
In case specified pressure cannot be attained, replace
the pinch roller spring.
330 £30 grm
SPRING GAUGE
PINCH ROLLER
PINCH ROLLER
SPRING
Fig. 20
TAPE SPEED
ADJUSTMENT SCREW
Fig. 21
5. WINDING TORQUE MEASUREMENT
IN EACH MODE
Insert cassette torque meter and measure in each
mode.
For fast forward and rewind measure at the end of
the tape when the tape has stopped running.
The specified torque is: .
Playback : 35 to 60 g-cm
Fast Forward, Rewind
: 80 to 120 g-cm
In case specified take-up torque cannot be attained.
Playback mode
: Replace Take-up Reel Table Block.
Fast Forward of Rewind mode :
Replace Middle Gear Block.
6. TAPE SPEED ADJUSTMENT
(Refer to Fig. 21)
Connect the frequency counter to the line output
terminals. Playback a 1,000 Hz pre-recorded test tape
and adjust tape speed adjustment screw to obtain a
tape speed of 1,000 Hz + 1%.
21
Advertisement
