Adjustment Method - JVC KD-SX8250 Service Manual

KD-SX8250/KD-SX780

Adjustment method

Test instruments required adjustment
1.Digital oscilloscope (100MHz)
2.AM Standard signal generator
3.FM Standard signal generator
4.Stereo modulator
5.Electric voltmeter
6.Digital tester
7.T c
8.T
9.Extension cable for check
EXTGS004-22P
Standard measuring conditions
Power supply voltage DC 14.4V(11V to 16V allowance)
Load impedance
Line-out Level/Impedance
KD-SX8250 : 4.0 V/20k
KD-SX780 : 2.0 V/20k
Output impedance : 1k
How to connect the extension cable for adjusting
CN601
1-18
Standard volume position
Balance and Bass & Treble volume : Indication "0"
Loudness : OFF
Frequency Band
FM 1 - 3 87.5MHz - 107.9 MHz
AM 530kHz - 1710kHz
Dummy load
Exclusive dummy load should be used for AM, and FM.
For 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.
4 (4 to 8 allowance)
load(full scale)
load(full scale)
Front panel ass'y
Extension cables
EXTGS004-22P
o
CD Mechanism