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QT-27H(R)
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MECHANICAL ADJUSTMENT
e
For the details of the test tapes used for the measurement,
refer to the Table "TEST TAPES FOR MEASUREMENT"
on page 19.
ITEM
ADJUSTMENT
REMARKS
POINTS
(CHECK)
Pinch roller | Tension gauge | Pinch roller pre- | 270—330 g
pressure
(500 g)
ssure spring
* If the reading is
outside the range,
replace the pre-
ssure spring of the
pinch roller.
Driving
power
Tape tention
measuring
cassette
TW-2412
More than 170g
(Play : 40—60 g-cm)
Torque meter
Play TW-2111
(Fast-forward :
Fast-forward
85—130 g-cm)
TW-2231
(Rewind :
Rewind
85—130 g-cm)
TW-2231
Sine wave form
attains the
maximum.
Azimuth
Azimuth adjust-
ing screw
Test tape
MTT-114
Tape speed | Test tape
Variable resistor
+15
CIRCUIT ADJUSTMENT (AUDIO SECTION)
E.V: ELECTRONIC VOLTMETER
Record
Mode
SETTING
POSITION
OF SWITCH
AND KNOB
@ Volume control: Maximum
@ Balance control: Center
®@ Tone control: High
e Function selector switch: Tape
e Beat cancel switch: A
ADJUST-
MENT
REMARKS (CHECK)
POINT
BIAS OSCI-
LLATION
FREQUENCY
(A: 53 £4 kHz)
(B: 54 + 2 kHz)
(C: 47.5 +2 kHz)
PLAYBACK
AMPLIFIER
SENSITIVITY
Test tape
MTT-118
E.V: ELECTRONIC VOLTMETER
Dual-trace
Headphones
Syncroscope
Jack (L-ch)
Ey.
Playback
Test Tape
MTT-114
Headphones
Jack (R-ch)
Record/Playback
Head
Figure 8—1 AZIMUTH
Headphones Jack
Playback
Frequency
Mode
Counter
Test Tape
MTT-111
Record/Playback
Head
Figure 8-2 TAPE SPEED
Record/Playback
eae
Oscilloscope
aN
Frequency
Counter
Figure 8-3
BIAS OSCILLATION FREQUENCY
Headphones Jack
Oscilloscope
Playback
Test Tape
MTT-118
Record/Playback
Head
Figure 8—4 PLAYBACK AMPLIFIER SENSITIVITY
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