Sony FD-525 - 3 Electrical Adjustments; Tuner Section

SECTION 3
ELECTRICAL ADJUSTMENTS
3-1. TUNER SECTION
l FM Section
Setting :
MODE switch : FM
FM rf signal
generator
deviation by 400Hz signal
output level : as low as possible
l AM Section
Setting :
MODE switch : AM
AM rf signal
antenna
30% amplitude
modulation by
400Hz signal
VTVM
(range : 0.5-5V ac)
, 4
EAR jack
l Repeat the procedures in each adjustment several times,
and the frequency coverage and tracking adjustments
should be finally done by the trimmer capacitors.
l Remove telescopic antenna in FM section adjustments.
FM FREQUENCY COVERAGE
ADJUSTMENT
I
I
Adjust for a maximum reading on VTVM.
1
L3 CT3
86.5MHz
109.5MHz
I
Adjust for a maximum reading on VTVM.
11
AM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on VTVM.
L4 CT4
I
520kHz 1,750kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on VTVM.
Ll CT1
620kHz 1,400kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on VTVM.
Tl
450kHz
Adjustment Location : R board (component side)
::
I.3 CTJ, ,CTZ L2-1 L2-2,
AL-L
FREQFUMENCY
CoYiYGE
TR$$ NO
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