Sony HCD-H33D, Руководство по обслуживанию

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Procedure :
1. Tune the set to 98 MHz
2. Adjust RV42 so that the TUNED indicatior goes on.
Adjustment Location : TCB board (see page 15)
SW OSC Voltage Adjustment (E3, EA, MY, SP, HK model)
Setting :
Band : SW
Procedure :
1. Connect digital Voltmeter to diode D1 center lead and ground.
2. Adjust for a following value reading on digital Voltmeter.
Set frequency
Adjustment Reading on
part digital voltmeter
SW
5.95 MHz T2 1.2 Vdc
17.9 MHz CV2 8.5 Vdc
Adjustment Location : TCB board (see page 15)
SW Tracking Adjustment (E3, EA, MY, SP, HK model)
Setting :
Band : SW
Procedure :
Adjust for maximum reading on level meter.
Set frequency
Adjustment
part
SW
7 MHz T1
17 MHz CV1
•
Repeat the procedures is each adjustment several times, and the
frequency coverage and tracking adjustment should be finally done
by the trimmer capacitors.
Adjustment Location : TCB board (see page 15)
set
AM RF signal
generator
Modulation: 400 Hz
30% modulation
+
–
level meter
SPEAKER terminal
AM ANTENNA terminal
TUNER SECTION
Precautions in Repairing
Note. 1
: The adjustment should be performed in the publication.
(MW
→
FM
→
SW)
Note. 2 : As a front-end (FE1) is difficult to repair if faulty, re-
place it with new one.
•
Abbreviation
E2 : Tuner sections SW BAND do not exist.
E3 : Turner sections SW BAND exist.
EA : Saudi Arabia
MY : Malaysia
SP
: Singapore
HK : Hong Kong
AM Tuned Level Adjustment
Setting :
Band : MW
Procedure :
1. Set loop antenna A so that the loop antenna B input level be-
comes 55 dBµ/m (0.56 mV/m)
2. Tune the set to 999 kHz (at 9 kHz step) or 1,050 kHz (at 10 kHz
step).
3. Adjust RV41 so that the TUNED indicatior goes on.
Adjustment Location : TCB board (see page 15)
FM Tuned Level Adjustment
Note :
Always make the tuning level adjustment first.
(Since it affects the FM tuning level).
Setting :
Band : FM
AM RF signal
generator
loop antenna A
set
loop antenna B
Carrier frequency
Modulation
: 999 kHz (at 9 kHz step) or
1,050 kHz (at 10 kHz step)
: 400 Hz 30 % modulation
set
FM ANTENNA terminal (TM1)
FM RF stereo signal
generator
Carrier frequency : 98 MHz
Modulation
: 1 kHz, 75 kHz (100%)
Output level : 0.018 mV (25 dB
µ
)
75
Ω
coaxial
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