Adjustment Method - JVC KS-LX200R Service Manual

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
Measuring conditions(Amplifier section)
Power supply voltage
Load impedance
Line out
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 receiving.
FM mono mode 97.9MHz/66dB,INT/400Hz,22.5kHz
deviation pilot off mono.
FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev.
Output level 0dB(1 V,50
Cassette type for CTG-N
(mechanism adjustment)
DC14.4V(10.5~16V)
4 (2Speakers connection)
20k
/open terminal).
Tuner section
BAND STEP
FM : 100kHz (Seek), 50kHz (Manual)
AM : 9kHz step
Preset Memory Initialization
Preset Memory
Band
M1 M2
FM(MHz)
87.5
89.9 97.9
AM(kHz)
153 216
DUMMY LOAD
Exclusive dummy load should be used for AM
and FM dummy load,there is a loss of 6dB
between SSG output and antenna input. The
loss of 6dB need not be considered since
direct reading of figures are applied in this
working standard.
Arrangement of Adjusting
Cassette Mechanism Section
Capstan motor
Cassette mechanism
(Surface)
Azimuth screw
(Forward side)
Azimuth screw
(Reverse side)
KS-LX200R
M3 M4 M5
M6
105.9 108.0
87.5
603 999 1404
1620
Tape speed adjust
Playback head
1-13