Adjustment Method - JVC KS-FX12 Service Manual

KS-F150
KS-FX12

Adjustment Method

Test Instruments reqired for adjustment
1. Digital osclloscope(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 (10.5 - 16V)
Load impedance ........... 4 Ω (2Speakers connection)
Line out ............................................................ 20kΩ
Frequency Band
MODEL
J
FM
E
Band J
MW
E
LW E
2-8
(mechanism adjustment)
KS-F150/FX12
87.5-107.9MHz 200KHz step
87.5-108MHz 50KHz step
530-1710KHz 10KHz step
522-1620KHz
9KHz step
144-279KHz
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. pilot7.5kHz dev.
0dB(1 µV,50 Ω /open terminal)
Output level