(No.MA098)1-11
SECTION 4
ADJUSTMENT
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.
Measuring conditions (Amplifier section)
Frequency Band
AM mode
999kHz/62dB, INT/400Hz, 30%
modulation signal on receiving.
FM mono mode
97.9MHz/66dB, INT/400Hz, 22.5kHz
deviation pilot off mono
FM stereo mode
1kHz, 67.5kHz dev. pilot 7.5kHz dev.
Output level
0dB (1
µ
V,50
Ω
/open terminal)
Power supply voltage:
DC14.4V (10.5V to 16V)
Load impedance:
4
Ω
(2Speakers connection)
Line out:
20k
Ω
Band
FM
87.5-108MHz
50KHz step
AM
531-1602KHz
9KHz step
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