Sony S2 Sports Walkman SRF-HM01V, Руководство по обслуживанию

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7
SRF-HM01V
SECTION 3
ELECTRICAL ADJUSTMENTS
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4 530 kHz 1.30
±
0.05 V
Confirmation 1710 kHz 8.10
±
1.00 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3 590 kHz
CT3 1490 kHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation TV 2ch (59.75 MHz) 1.91
±
0.50 V
Confirmation 108.0 MHz 11.70
±
1.00 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2 TV 2ch (59.75 MHz)
CT2 108.0 MHz
TV VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
Confirmation
WEATHER 2ch
3.00
±
0.50 V
(162.4 MHz)
Confirmation
TV 13ch
8.10
±
1.00 V
(215.75 MHz)
TV TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
CT1 TV 10ch (197.75 MHz)
0 dB=1
µ
V
[AM]
Setting:
BAND: AM
[FM/TV]
Setting:
BAND: FM, TV or WEATHER
• Repeat the procedures in each adjustment several times for a
maximum reading on level meter.
• Remove FM wire antenna in FM adjsutments.
Adjustment Location:
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
16
Ω
headphone
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
+
–
level meter
headphone
set
16
Ω
0.01
µ
F
TP (ANT)
+
–
digital voltmeter
MAIN board
TP (VT)
TP (GND)
– MAIN Board (Conductor Side) –
TP
(ANT)
TP
(GND)
TP
(VT)
IC201
CT1
TV Tracking
Adjustment
L4
AM VCO Voltage Adjustment
L3
CT3
AM Tracking Adjustment
L2
CT2
FM Tracking Adjustment