Read Sony CHC-P33D / HCD-H33D Service Manual online
– 14 –
Procedure :
1. Tune the set to 98 MHz
2. Adjust RV42 so that the TUNED indicatior goes on.
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.
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.
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.
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
generator
Modulation: 400 Hz
30% modulation
30% modulation
+
–
–
level meter
SPEAKER terminal
AM ANTENNA terminal
TUNER SECTION
Precautions in Repairing
Note. 1
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
MY : Malaysia
SP
: Singapore
HK : Hong Kong
AM Tuned Level Adjustment
Setting :
Band : MW
Band : MW
Procedure :
1. Set loop antenna A so that the loop antenna B input level be-
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 :
Note :
Always make the tuning level adjustment first.
(Since it affects the FM tuning level).
(Since it affects the FM tuning level).
Setting :
Band : FM
Band : FM
AM RF signal
generator
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
1,050 kHz (at 10 kHz step)
: 400 Hz 30 % modulation
set
FM ANTENNA terminal (TM1)
FM RF stereo signal
generator
generator
Carrier frequency : 98 MHz
Modulation
Modulation
: 1 kHz, 75 kHz (100%)
Output level
: 0.018 mV (25 dB
µ
)
75
Ω
coaxial
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