Adjustment - JVC KW-ADV793J Service Manual

4.1 Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Digital tester
(3) Test Disc
(4) Extension cable :
EXTXD001-50PF (CN403 --- CN105)
EXTCN001-6P (CN351 --- CN109)
EXTDV002-28PF (CN401 --- CN653)
EXTDV002-16PF (CN601 --- CN654)
4.4 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.
4.5 How to connect the extension cable for adjusting
Caution:
Be sure to attach the heat sink and rear bracket onto the power amplifier IC and regulator IC 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.
EXTDV002-16PF
CN601
1-18 (No.MA473<Rev.002>)
SECTION 4

ADJUSTMENT

CN351
EXTDV002-28PF
EXTCN001-6P
CN109
CN401
CN654
CN653
4.2 Standard measuring conditions
Power supply voltage DC14.4V(10.5 to 16V)
Load impedance 20K ohm (2 Speakers connection)
Output Level Line out 2.5V (Vol. MAX)
4.3 Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
EXTXD001-50PF
CN105
use original wire
CN403