Teac V-2RX - Mechanical Checks and Adjustments; Tape Path Adjustment (V-2 RX); Solenoid and Roller Adjustments; Torque and Speed Adjustments

-V-2RX/V-4RX
4 MECHANICAL CHECKS AND ADJUSTMENTS
4-1 PLAY SOLENOID
1. With the deck in the play mode, check that the pinch roller is
pressing against the capstan shaft and that the pinch roller arm
spring is released from the pinch roller arm.
2. lf adjustment is required, adjust the position of the play sole-
noid.
capstan shaft
pinch roller
(3
oO
pinch roller >
ge a
arm spring 5
eX
pinch roller arm
Released here
Fig. 4-1
4-2 PAUSE SOLENOID
1. The clearance between the pinch roller and the capstan shaft
should be 0.3mm ~ 0.5 mm when the deck is in the pause
mode.
2. If adjustment is required, adjust the position of the pause sole-
noid.
4-3 TAPE PATH ADJUSTMENT (V-2RX ONLY)
1. Load and play a TEAC MTT-902 mirror tape (C-90) and check
for any noticeable tape curling on the sides of the record-playback
head guide.
2. Adjust the height of the erase head when curling is evident.
3. The clearance between the head base plate and the head stopper
should be 0.3 mm ~ 0.5 mm, as shown in the figure below, when
the erase head is touching the pad holder assembly during play-
back.
pad holder ass’y
2 Head stopper
erase head height pe
adjustment nut
Fig. 4-2
4-4 PINCH ROLLER PRESSURE
1. With the cassette holder shut and no tape loaded, putihe deck in
the play mode after pushing the cassette-in switch senQr arm up-
wards and holding it.
2. Hook a spring scale on the pinch roller assembly as siOwn in the
illustration.
3.. Pull the scale downwards until there is sufficient foie to sepa-
rate the pinch roller from the capstan shaft.
4. Ease pressure until the pinch roller makes just enough contact
with the capstan shaft so that the pinch roller just begins to turn.
At this point, note the reading on the scale. It shoulel be from
350 g to 450 g (12.3 oz. to 15.9 o2.).
Fig. 4-3
4-5 REEL TORQUE
1. Load the cassette torque meter on the deck and read the pointer
indication on the dial scale for each tape transport operation.
The measured torque should be within the following values:
Take-up: 35 to 65 g-cm (0.49 to 0.90 oz-inch)
Supply: 2 to 4.g-cm (0.028 to 0.056 oz-inch)
F.F/REW: 80 to 150 g-cm (1.1 to 2.1 oz-inch)
4-6 TAPE SPEED
1. Connect a frequency counter to the deck as shown in Fig. 4-4.
2. Play a tape for more than five minutes to warm up the deck,
then load a TEAC MTT-111 test tape containing a 3000-Hz test
tone and play the test tape.
3. While the tape is playing, use a non-metallic or insulated screw-
driver and adjust the control on the capstan motor for a reading
of 3015 to 3025 Hz on the frequency counter.
4. Play the tape at the beginning and at the end, and check that the
speed deviation is within the ‘prescribed limits by observing that
the reading on the frequency counter never deviates more than
+70 Hz from 3000 Hz, nor drifts more than 70 Hz at any given
time.
Frequency Counter
Oscillator
Wow &
Flutter Meter
DECK
under TEST
R
LINE IN
(R)
OUTPUT
Fig. 4-4