Sony WM-FX271FP, Service Manual

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8
WM-FX271FP
i jack (J301)
set
16 Ω
level meter
(range: 0.5-5 V ac)
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
digital
voltmeter
TP (VT)
Main board
• 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
1,000 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1 CT1
620 kHz 1,400 kHz
TUNER SECTION 0 dB = 1 µV
• FM Section
Setting:
RADIO ON/OFF switch: ON
BAND switch
: FM
FM Tuning Voltage Adjustment
FM TUNING VOLTAGE ADJUSTMENT
Adjust for a 8.5 ± 0.3 (14.5 ± 0.5) Vdc reading on digital voltmeter.
L3
108 MHz
FM Tracking Adjustment
Modulation: 1 kHz, 75 kHz dev. (100%)
Output level: as low as possible
digital
voltmeter
TP (VT)
Main board
FM RF signal
generator
0.01 µ F
(FM RF IN)
Main board
(GND)
i jack (J301)
set
16 Ω
level meter
(range: 0.5-5 V ac)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
87.5 MHz
• AM Section
Setting:
RADIO ON/OFF switch: ON
BAND switch
: AM
AM Tuning Voltage Adjustment
AM TUNING VOLTAGE ADJUSTMENT
Adjust for a 1.1 ± 0.1 Vdc reading on digital voltmeter.
L4
530 kHz
AM IF Adjustment, AM Tracking Adjustment
Modulation: 400Hz, 30%
Output level: as low as possible