CDX-4483ESP - Sony Car Audio Service Manual (repair manual). Page 21

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AM RF signal

generator

AM dummy

antenna (50 

Ω

)

set

antenna
terminal

30 

Ω

15 pF

65 pF

D-BASS switch

: OFF

SOURCE 

n MODE button : MW

Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
output level

: 33 dB (44.7 

µ

V)

Procedure :
1. Set to the test mode. (See page 19.)
2. Push the  SOURCE  button.
3. Push the  MODE  button and set to MW.

Display

4. Push the preset  3  button.

Display

5. Adjust with the volume RV1 on TU1 so that the “MW”

indication turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.

Display

Adjustment Location : See page 22.

Carrier frequency : 69.5 MHz (FM2 : 3CH)
Output level

: 60 dB (1 mV)

Procedure :
1. Connect the level meter to the TP1 on main board.
2. Set the modulation frequency of the FM RF signal generator to

1 kHz (10 kHz div.).

3. Then output level is supposing that 0 dB.
4. Set the modulation frequency of the FM RF signal generator to

31.25 kHz (10 kHz div.).

5. Adjust L604 so that the reading on the level meter becomes to

maximum.

6. Adjust RV602 so that the reading on the level meter becomes to

13.0 

±

 0.5 dB.

Adjustment Location : See page 22.

D-BASS switch : OFF
SOURCE button : FM

FM RF signal

generator

antenna
terminal

set

+

–

level meter

main board

TP1