Adjustment Method - JVC KS-FX222 Servise Manual

KS-FX222
QQ
3 7 63 1515 0
Test instruments reqired for adjustment
1. Digital oscilloscoe(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.............. DC14.4V(11V - 16V allowance)
Load impedance............ 4Ω (4Ω to 8Ω allowance)
Line out level/Impedance..............1.0V/20kΩ load (250 nWb/m)
TE
L 13942296513
Frequency band
FM: 87.5 MHz to 107.9 MHz
Band
AM : 530 kHz to 1710 kHz
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1-12 (No.49772)
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Adjustment method

(Mechanism adjustment)
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SECTION 3
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 97.9MHz/66dB,INT/400Hz,22.5kHz
FM stereo mode 1kHz,67.5kHz dev.pilot 7.5kHz dev
Output level
Q Q
3 6 7 1 3
u163
.
2 9 9 4 2 8
999kHz/62dB,INT/400Hz,30%
modulation signal on recieving.
deviation pilot off mono
0dB(1 µ V,50 Ω /open terminal)
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9