Sony MDX-C670 Service Manual page 13

AM (MW) Auto Scan/Stop Level Adjustment
Setting:
SOURCE button (MDX-C670)
SOURCE button (MDX-C670RDS): MW
AM RF signal
generator
AM dummy antenna
(50 Ω )
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
: 33 dB (44.7 µ V)
Output level
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
*1
REG
TP
3. Push the preset 3 button.
Display
*1
REG
TP
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
REG
TP
*1 : MDX-C670RDS is indicates "MW".
Adjustment Location: See page 14.
: AM
30 Ω 15 pF
65 pF
set
antenna
terminal
SHUF1
SHUF1
SHUF1
– 13 –
RDS S-Meter Adjustment (MDX-C670RDS)
Setting:
SOURCE button: FM
FM RF signal
generator
Carrier frequency : 98.0 MHz
: 35 dB (56.2 µ V)
Output level
Mode : mono
Modulation : no modulation
Procedure:
1. Set to the test mode. (See page 12.)
2. Push the SOURCE button and set to FM.
Display
REG
3. Push the preset 10 button.
4. Adjust RV1 on MAIN board so that the display indication is
"15.8".
Display
REG
Specification: Display indication : 15.6 to 16.4
Adjustment Location: See page 14.
antenna
terminal
0.01 µ F
set
SHUF1
SHUF1