MDX-C670, MDX-C670RDS - Sony Car Audio Service Manual (repair manual). Page 13

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 SOURCE   button (MDX-C670)

: AM

 SOURCE   button (MDX-C670RDS): MW

Procedure:
1. Set to the test mode. (See page 12.)
2. Push the SOURCE button and set to AM (MDX-C670) or MW

(MDX-C670RDS).

Display

3. Push the preset 3 button.

Display

4. Adjust with the volume RV1 on TU1 so that the “AM” or “MW”

indication turns to “AM0” or “MW0” indication on the display
window.
But, in case of already indicated “AM0” or “MW0”, turn the
RV1 so that put out light “0” indication and adjustment.

Display

*1 : MDX-C670RDS is indicates “MW”.

Adjustment Location: See page 14.

 SOURCE   button: FM

AM RF signal

generator

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

: 33 dB (44.7 

µ

V)

(50 

Ω

)

AM dummy antenna

30 

Ω

15 pF

65 pF

antenna
terminal

set

FM RF signal

generator

Carrier frequency : 98.0 MHz
Output level

: 35 dB (56.2 

µ

V)

Mode

: mono

Modulation

: no modulation

0.01

µ

F

set

antenna
terminal

3. Push the preset 10 button.
4. Adjust RV1 on MAIN board so that the display indication is

“15.8”.

Display

Procedure:
1. Set to the test mode. (See page 12.)
2. Push the SOURCE button and set to FM.

Display

SHUF1

REG

TP

*

1

SHUF1

REG

TP

*

1

SHUF1

REG

TP

*

1

SHUF1

REG

SHUF1

REG

Specification: Display indication : 15.6 to 16.4

Adjustment Location: See page 14.