Tuner Section - Sony WM-PSY02 Service Manual

TUNER SECTION

0 dB=1µ V
FM SECTION
Setting:
RADIO ON/OFF switch: ON
BAND switch: FM
FM Tuning Voltage Adjustment
digital
voltmeter
(VT)
(GND)
FM TUNING VOLTAGE ADJUSTMENT
Adjustment value: 9.0V
Standard value: 9.0 – 9.2V
L3
108 MHz
FM Tracking Adjustment
(FM RF IN)
level meter
(AC: 0.5 – 5 V range)
16 Ω
set
2
jack (J301)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
87.5MHz
FM RF
signal generator
0.01 µ F
(GND)
Modulation: 1kHz,75kHz
dev (100%)
Output level: as low possible.
– 7 –
AM SECTION
Setting:
RADIO ON/OFF switch: ON
BAND switch: AM
AM Tuning Voltage Adjustment
digital
voltmeter
(VT)
(GND)
AM TUNING VOLTAGE ADJUSTMENT
Adjustment value: 1.0V
Standard value: 1.0 – 1.1V
L4
530 kHz
AM IF Adjustment, AM Tracking Adjustment
AM RF Signal generator Put the lead-wire
antenna close to
the set.
Modulation: 400 Hz, 30%
Output level: as low possible.
level meter
(AC: 0.5 – 5 V range)
16 Ω
set
2
jack (J301)
* Repeat the procedures in each adjustment several times, and the
tracking adjustment should be finally done by the trimmer ca-
pacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 (BAR ANTENNA)
620 kHz
CT1
1,400 kHz