Sony WM-FX522 Service Manual page 13

TUNER SECTION 0 dB=1 µV
[AM]
Setting:
function : RADIO
BAND button : AM
Put the lead-wire
AM RF signal
antenna close to
generator
the set.
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
[FM]
Setting:
function : RADIO
BAND button : FM
FM RF signal
generator
TP61 (FM RF IN)
0.01 µF
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
Adjustment Location:
TP5
(VT)
level meter
16 Ω
+
set
–
i jack (J301)
level meter
16 Ω
+
set
–
i jack (J301)
TP5 (VT)
• AM alignment should be done with mechadeck attached.
• Repeat the procedures in each adjustment several times for a
maximum reading on level meter.
AM VT VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation 531kHz
Confirmation 1602 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L5
CT1
FM VT VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation 87.5 MHz
Confirmation 108 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L7
Confirmation
FM Tracking Adjustment
TP61
(FM RF IN)
TP2
(GND)
AM Tracking
CT1
Adjustment L5
RV601 Tape Speed Adjustment
WM-FX522
digital voltmeter
+
–
1.3 ± 0.3 V
7.0 ± 0.5 V
621 kHz
1395 kHz
3.85 ± 0.5 V
7.7 ± 1 V
87.5 MHz
108 MHz
L7
13