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3 7 63 1515 0
4.1
Adjustment method
Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Frequency counter meter
(3) Electric voltmeter
(4) Wow & flutter meter
(5) Test tapes
VT724 : For DOLBY level measurement
VT739 : For playback frequency measurement
VT712 : For wow flutter & tape speed measurement
VT703 : For head azimuth measurement
(6) Torque gauge : Cassette type for CTG-N (Mechanism adjustment)
Standard volume position
Balance and Bass, Treble volume, Fader : Center (Indication "0")
Loudness, Dolby NR, Sound, Cruise : Off
Volume position is about 2V at speaker output with following conditions, Playback the test tape VT721.
AM mode
FM mono mode
FM stereo mode
Output level
Measuring conditions (Amplifier section)
TE
L 13942296513
Power supply voltage
Load impedance
Line out
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999kHz/62dB, INT/400Hz, 30% modulation signal on receiving.
97.9MHz/66dB, INT/400Hz, 22.5kHz deviation pilot off mono
1kHz, 67.5kHz dev. pilot 7.5kHz dev.
0dB (1µV,50Ω/open terminal)
: DC14.4V (11V to 16V)
: 4 Ω (4 Ω to 8 Ω allowance)
: 1.0V/20kΩload (250 nWb/m)
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SECTION 4
8
ADJUSTMENT
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6 7
1 3
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2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
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9 9
2 8
9 9
(No.MA132)1-13
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