– 6 –
SECTION 3
ELECTRICAL ADJUSTMENTS
SW Control Voltage Adjustment
(Frequency Coverge Adjustment)
(E3, EA, MY, SP, HK, JE 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
part
Reading on digital
voltmeter
SW
5.95MHz T2 1.2Vdc
17.9MHz CV2 8.5Vdc
SW Tracking Adjustment
(E3, EA, MY, SP, HK, JE model)
Setting :
Band : SW
+
–
AM RF signal
generator
AM ANTENNA terminal
SPEAKER terminal
Modulation : 400Hz
30% modulation
set
VTVM
Procedure :
Adjust for maximum reading on VTVM.
Set frequency
Adjustment
part
SW
7MHz T1
17MHz CV1
r
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
Precautions in Repairing
Note. 1 : The adjustment should be performed in the publication.
(MW n FM n SW)
Note. 2 : As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
r
Abbreviation
AUS : Australian AR : Argentine
EA : Saudi Arabia HK : Hong Kong
SP : Singapore JE : Tourist
MY : Malaysia TH : Thailand
CND : Canadian
E2 : Tuner sections SW BAND do not exist.
E3 : Tuner sections SW BAND exist.
MW SECTION
MW Tuned Indication Lighting Level
Setting :
Band : MW
set
AM RF signal
generator
loop antenna A
loop antenna B
Carrier frequency : 999kHz (at 9kHz step)
1,050kHz (at 10kHz step)
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 or 1,050kHz.
3. Adjust RV41 so that the TUNED indicatior goes on.
FM SECTION
FM Tuned Indication Lighting Level
Note : Always make the tuning level adjustment first.
(Since it affects the FM tuning level.)
Setting :
Band : FW
FM RF stereo signal
generator
75
Ω
coaxial
FM ANTENNA terminal
set
Carrier frequency : 98MHz
Modulation : OFF
Output level : 0.018mV (25dB )
µ
Procedure :
1. Tune the set to 98MHz.
2. Adjust RV42 so that the TUNED indicator goes on.
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