Sony XR-4740RDS Service Manual page 16

FM Signal Meter Adjustment
Setting:
SOURCE button: FM
FM RF signal
generator
0.01 µ F
Carrier frequency : 98.00 MHz
: 35 dB (56.2 µ V)
Output level
Mode : mono
Modulation : no modulation
Procedure:
1. Set to the test mode. (See page 14.)
2. Push the SOURCE button and set to FM.
Display
3. Push the preset 6 button.
4. Adjust RV1 on MAIN BOARD so that the display indication is
"160".
Display
Specification: Display indication: 158 to 162
Adjustment Location: See page 17.
antenna jack (J1)
set
REG
INTRO
REG
INTRO
– 16 –
MW Auto Scan/Stop Level Adjustment
Make this adjustment after "FM Auto Scan/Stop Level Adjustment".
Setting:
SOURCE button: MW
MW RF signal
generator
MW 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 14.)
2. Push the SOURCE button and set to MW.
Display
MW
3. Adjust with the volume RV1 on TU1 so that the "MW" indica-
tion 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 17.
30 Ω 15 pF
65 pF
set
antenna jack (J1)
999
INTRO
999
INTRO