Sony MW-FX277, Руководство по обслуживанию

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TUNER SECTION
AM Section
BAND : AM
TV/FM Section
BAND : TV or FM
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
RV2 450kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust parts Frequency display
Reading on digtal
voltmeter
Confirmation 530kHz Standard value : 3V or less
L7 1,710kHz
Adjustment value : 10.0V
Standard value : 9.9-10.1V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 620kHz
CT1 1,400kHz
TV and FM FREQUENCY COVERAGE CONFIRMATION
Frequency display Reading on digtal voltmeter
Confirmation 2CH (TV) Standard value : 1.6 - 2.2V
Confirmation 108MHz (FM) Standard value : 11.0V or less
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 98MHz
Confirmation 108MHz
TV TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L5 2CH
Confirmation 13CH
Adjustment Location : Main board (See page 8)
0 dB = 1
µ
V
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
set
32
Ω
phones jack (J301)
level meter
R205 R105
C1
C35
C310
C312
C39
C40
L4
L5
TUNER
GND
TP
(FM/TV IN)
(L)
STID
S304
S303
-2 -1
-2 -1
FM RF signal
generator
22.5kHz frequency deviation
by 400Hz signal.
Output level :
as low as possible
TP
(FM/TV IN)
0.01
µ
F
[MAIN BOARD]
(Side B)
Frequency Coverage Adjustment
Setting :
D401
D402
C401
C403
C405
C406
R401
R402
R403
R19
C402
C404
T401
GND
TP
(VT)
TP (VT)
TP (GND)
[MAIN BOARD]
(Side B)
digital voltmeter
(DC range)
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