Teac C-3RX Service Manual page 5

| C-3RX |
4 MECHANICAL ADJUSTMENTS AND CHECKS
4-1 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: 45 to 65 g-cm (0.62 to 0.90 oz-inch)
Supply: 3 to 8 g-cm (0.042 to 0.11 oz-inch)
F.F.and REW: 90 to 160 g-cm (1.25 to 2.22 0z-inch)
4-2 PINCH ROLLER PRESSURE
1. With the cassette holder shut and no tape loaded, put the deck in
PLAY mode.
2. Hook a spring scale on the tap of the pinch roller assembly plate,
as shown in the illustration.
3. Pull the scale down until there is sufficient force to separate 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 should be from
390 g to 490 g (13.8 oz. to 17.3 02.)
5. If the pressure is not within the prescribed specifications, it may
be adjusted by first removing the pinch roller spring from the
pinch roller assembly and then bending the spring as shown in
the illustration.
stronger
stronger
KZ y
weaker
Fig. 4-1
4-3 HEAD BASE PLATE POSITIONING
1. Set the deck in the PLAY mode. , ;
2. Push the head base plate by hand in the direction of the arrow
and check that the head base plate and the stopper portion of
the mechanism chassis make contact.
3. If there is any clearance, loosen the two screws on the head base
plate solenoid and reposition the solenoid until the clearance is
eliminated.
Head base plate
Stopper portion of
mechanical
chassis
There should be
no clearance at
this point.
Push by hand
T-1554-1
when in PLAY mode 23
Fig. 4-2
Screws
Head Base
Solenoid
Fig. 4-3 Head base solenoid location
4-4 CAPSTAN ASSEMBLY THRUST
1. Turn the thrust adjusting screw so that thrust of the capstan
shaft is within 0.05 mm to 0.15 mm.
Thrust play
0.05 mm to 0.15 mm
ily
—)|__ez Ue
J
Thrust
adjusting
screw
Flywheel
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