Adjustment Method - JVC KS-FX202 Service Manual

KS-FX202

Adjustment method

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............ 4 (4 to 8 allowance)
Line out level/Impedance..............1.0V/20k load (250 nWb/m)
Frequency band Frequenc
FM: 87.5 MHz to 108.0 MHz
AM : 522 kHz to 1620 kHz(MW)
Band
144 kHz to 279 kHz(LW)
1-12
(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 999kHz/62dB,INT/400Hz,30%
modulation signal on recieving.
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 V,50 /open terminal)