Adjustment - JVC KD-S790 Service Manual

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3.1 Adjustment method
Test instruments required for 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. Tracking offset meter
8. Test Disc JVC :CTS-1000
9. Extension cable for check
EXTSH002-22P 1
Standard measuring conditions
Power supply voltage DC14.4V(10.5~16V)
Load impedance
Output Level
How to connect the extension cable for adjusting
TE
L 13942296513
The cardboard is cut in a suitable size.
uses for the insulation stand of mechanism.
Caution:
Be sure to attach the heat sink and rear
bracket onto the power amplifier IC351
and regulator IC961 respectively,
before supply the power.
If voltage is applied without attaching
these parts, the power amplifier IC
and regulator IC will be destroyed
by heat.
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20Kohm(2 Speakers connection)
Line out 2.0V (Vol. MAX)
Heat sink
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SECTION 3
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Adjustment

Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
Frequency Band
FM 87.5MHz ~ 107.9MHz
AM 530kHz ~ 1710 kHz
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.
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3 6 7 1 3 1 5
EXTSH002-22P
Rear bracket
co
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9 4 2 8
0 5 8 2 9 9 4 2 8
Extension cable
m
(No.49788)1-23
KD-S790
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9 9