Sony HCD-H11 Service Manual page 13

TUNER SECTION
Precautions in Repairing
The adjustment should be performed in the publication.
Note. 1 :
(MW n FM n SW)
Note. 2 : As a front-end (FE1) is difficult to repair if faulty, replace it
with new one.
Abbreviation
r
AUS : Australian
G : German
EA : Saudi Arabia
MX : Mexican.
MY : Malaysia
EE : East European
E2 : Tuner sections SW BAND do not exist.
E3 : Tuner sections SW BAND exist.
MW Tuned Indication Lighting Level
Setting :
Band : MW
loop antenna A
AM RF signal
generator
Carrier frequency : 999kHz (at 9kHz step) or
1,050kHz (at 10kHz step)
Modulation : 400Hz 30% modulation
Procedure :
1. Set loop antenna A so that the loop antenna B input level becomes
55dBµ/m (0.6mV/m)
2. Tune the set to 999kHz (at 9kHz step) or 1,050kHz (at 10kHz
step).
3. Adjust RV41 so that the TUNED indicatior goes on.
Adjustment Location : TCB board (see page 14)
FM Tuned Indication Lighting Level
Always make the tuning level adjustment first.
Note :
(Since it affects the FM tuning level.)
Setting :
Band : FW
FM RF stereo signal
generator
75 Ω coaxial
Carrier frequency : 98MHz
Modulation : 1kHz, 75kHz (100%)
Output level : 0.018mV (25dB )
IT : Italian
AR : Argentine
HK : Hong Kong
SP : Singapore
TW : Taiwan
loop antenna B
set
FM ANTENNA terminal
set
Procedure :
1. Tune the set to 98MHz.
2. Adjust RV42 so that the TUNED indicator goes on.
Adjustment Location : TCB board (see page 14)
SW Control Voltage Adjustment
(Frequency Coverge Adjustment)
(E3,EA,MY,SP,HK,TW 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
5.95MHz
SW
17.9MHz
Adjustment Location : TCB board (see page 14)
SW Tracking Adjustment
(E3,EA,MY,SP,HK,TW model)
Setting :
Band : SW
AM RF signal
generator
Modulation : 400Hz
30% modulation
Procedure :
Adjust for maximum reading on Level mater.
Set frequency
7MHz
SW
17MHz
Repeat the procedures is each adjustment several times, and the
r
frequency coverage and tracking adjustment should be finally done
by the trimmer capacitors.
Adjustment Location : TCB board (see page 14)
– 13 –
Adjustment Reading on digital
part voltmeter
T2 1.2Vdc
CV2 8.5Vdc
Level meter
+
set
–
SPEAKER terminal
AM ANTENNA terminal
Adjustment
part
T1
CV1