Mechanical Adjustment - Sharp QT-30GD Service Manual

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REMOVAL OF CASSETTE COMPARTMENT
2. Open the cassette compartment in the arrow direction
to take it off.
Figure 4-l
PLAYBACK HEAD AZIMUTH ADJUSTMENT
2. Play a test tape (TEAC, MTT-114, 10 kHz prerecorded).
3. Adjust the head azimuth adjusting screw so that sine
waveform attains the maximum.
TAPE SPEED ADJUSTMENT
to the headphones jack.
2) Play a test tape (TEAC, MTT-111, 3 kHz prerecorded).
3) Put a plastic screwdriver on the P.W.Board and adjust
the semi-variable resistor VR102 so that the output fre-
quency is 3000 + 20 Hz on the wow/flutter meter.
TORQUE CHECK AT PLAY, FAST FORWARD AND
REWIND MODES
Put a torque meter cassette in the cassette compartment
of the set, and see that the measured torque in each mode
is normal as shown in Table 4.
Torque meter
Mode
cassette
Playback TW-2111
Fast-forward TW-223 1
Rewind TW-223 1
Table 4
TAPE TENSION CHECK
Put a tape tension meter cassette (TW-2412) in the cassette
compartment of the set, and see that measured tape tension
reading is more than 90 g-cm.
Measured torque
35 - 55 g-cm
50 - 100 g-cm
50 - 100 g-cm
Figure 4-2
Dual-trace
Electronic Voltmeter
ohm
32
as small as possible
Figure 4-3