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QQ
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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
Measuring conditions (Amplifier section)
Power supply voltage:
Load impedance:
Line out:
Frequency Band
FM
Band
TE
AM
L 13942296513
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ADJUSTMENT
(Mechanism adjustment)
DC14.4V (10.5V to 16V)
4Ω (2Speakers connection)
87.5-108MHz
50KHz step
531-1602KHz
9KHz step
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SECTION 4
2 9
8
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
20kΩ
Q Q
3
6 7
1 3
1 5
co
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9 4
2 8
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)
0 5
8
2 9
9 4
2 8
m
(No.MA098)1-11
9 9
9 9
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