CDX-4180R, CDX-4180RV - Sony Car Audio Service Manual (repair manual). Page 20

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D-BASS switch

: OFF

SOURCE 

n MODE button : MW

AM RF signal

generator

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

: 33 dB (44.7 

µ

V)

AM dummy
antenna (50 

Ω

)

antenna
terminal

set

15 pF

30 

Ω

65 pF

Procedure :
1. Set to the test mode. (See page 18.)
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 : tuner unit (TU1)

Adjustment Location : tuner unit (TU1)

–set upper view–

TU1

RV1

MW AUTO SCAN/

STOP LEVEL ADJ

RV2

FM AUTO SCAN/

STOP LEVEL ADJ

RV801

FM RDS

S-METER ADJ

RV4

FM STEREO

SEPARATION ADJ