Sony MDX-C670, Service Manual

Page: 13 / 59

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AM (MW) Auto Scan/Stop Level Adjustment
Setting:
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.
RDS S-Meter Adjustment (MDX-C670RDS)
Setting:
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.