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7. MEASUREMENT AND ADJUSTMENT
— MECHANICAL —
7-1
PINCH
ROLLER
PRESSURE
1. Load tape or block the shut-off arm in the ON position.
2. Attach a suitable spring scale to the pinch roller shaft.
3. Place the unit in the PLAY mode (> ), and holding the
spring scale as illustrated, slowly draw it away from the
pinch roller.
4. Do not allow the string to rub against the pinch roller.
5. Note the reading on the spring scale at the instant the
pinch roller stops rotating.
6. The scale should indicate 2.1 to 2.3 kg (4.6 to 5.1 lbs).
2.0 to 2.2 kg (4.4 to 4.8 lbs) for A-2300SX.
7. If adjustment is necessary, loosen the 3 screws on the
capstan solenoid and position the solenoid for optimum
pressure.
8. Adjust solenoid-limit position so that the gap between
capstan shaft and pinch roller is approx. 7mm
when
solenoid is not actuated. Also make sure pinch roller
shaft does not contact edit arm B. Limit is adjusted by
loosening the mounting screw (A), then sliding limit
until proper position is obtained.
CAPSTAN
SOLENOID
REPOSITION
SOLENOID
TO
OBTAIN
OPTIMUM
PRESSURE
CAPSTAN
PINCH ROLLER
SPRING SCALE
Fig. 7-1
Pressure Measurement and Adj. Locations
7-2
BRAKE
TORQUE
The brake torque is actuated mechanically. Pressure is set
by the variable spring force. While making these measure-
ments and adjustments, be careful not to bend the brake
bands. As brake torque will change with cleaning, brake
drums should be cleaned only when absolutely necessary.
If cleaning is required, use TEAC
cleaner TZ-261B. After
cleaning, operate the brakes by depressing the play and
STOP
buttons
several times to completely dry out the
brakes before performing the following procedure.
NOTE:
Brake
adjustments
are
made
with
NO
power
connected to the equipment.
1. Place an empty large hub reel on the left reel table, and
fasten one end of a 30" length of string to the reel anchor.
2. Wind several turns of string counterclockwise around the
hub and attach a suitable spring scale to the free end of
the string and pull on scale until reel begins to turn.
3. Take a reading only when the reel is in steady motion
since the force required to overcome static friction will
produce a false, excessively high initial reading.
4. The reading should be 1800 g-cm +200 g-cm 22 to 28
oz-in). 1000 g-cm +200 g-cm (11 to 17 oz-inch) for A-
2300SX.
5. If adjustment is required, loosen the 2 screws shown and
position the brake for optimum torque.
6. The adjustment of the right brake is the same, with the
exception that rotations are clockwise.
(wind string CLOCKWISE around reel hub)
7. See note at the top of page 12 for explanation of torque
measurements.
Solenoid
Brake Drum
ADJUSTMENT
SCREWS
Fig. 7-2.
Torque Measurement and Adjustment Location
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