Technics ST-G460 - Page 6

eReplacement of the Foot.
1.
Remove
the
4
heat
melted
posts
on
the
chassis
with
a
pair
of
Heat
Melted
Posts
nippers
or
similar
tool.
2.
To
replace
the
foot
(RKAQ009)
on
the
chassis,
melt
the
4
posts
with
a
soldering
iron.
Chassis
Soldering
iron
Foot
as
@ MEASUREMENTS AND ADJUSTMENTS near!
m@ FM
Control positions and equipment used
@ FM signal generator (FM-SG) @ Choke coil (100uH)
@ Stereo modulator @ Resistor(100k9)
@
Distortion
analyser
@
Ceramic
capacitor(200pF)
@
Oscilloscope
@
AC
and
DC
electronic
voltmeter(EVM)
@
Frequency
counter
Note:
For
Z201,
Z202,
L301,
L303
and
L304,
they
are
supplied
as
adjusted
parts.
So,
do
not
turn
the
cores
of
the
parts.
It
is
not
necessary
to
adjust
the
AM
circuit.
FM MONO DISTORTION ADJUSTMENT eM SSNs MENERATOR CONDITION
Modulation oo... ee 100%
1.Test
equipment
connection
is
shown
in
figure.
Modulation
frequency
.........
1kHz
2.Set
the
unit
to
“FM”
mode.
Output
level...
a.
66dB
3.Set
the
radio
frequency
display
and
signal
generator
to
100.10MHz.
4.Adjust the core of T101 so that the voltage measured in
signal mode is OmV (0+20 mV) in 300 mV range.
5.Adjust T7102 so that the distortion factor of L-CH is
minimized.
6.Repeat steps 4 and 5.
?.Make sure that the distortion factors of L-CH and R-CH
are nearly the same and minimum.
Note: The adjusting screwdriver used should be made of
resin.
MPX
VCO
ADJUSTMENT
FM
SIGNAL
GENERATOR
CONDITION
1.Test
equipment
connection
is
shown
in
figure.
peace
frequency
ses
oe
2.Set
the
unit
to”on/auto”
position,
NO
NEQUE
NEY
voeoeoe
@
unit
to
“on/auto”
position
Output
level
ow...
66dB
3. Set the radio frequency display and signal genarator to
100.10 MHz.
4.Adjust VR302 for 19kHz+30Hz on frequency counter
reading.
*USING ALTERNATE SYSTEM
1.Apply stereo signal from generator or receive the stereo
broadcast.
2.Adjust VR302 until stereo indicator lights up. Fix the arm
of VR302 as shown in figure.
basis “Stereo” OFF position
®—®....... “Stereo” ON position
tnerse
(Indicator
lighting)
(2) eae Adjust point of pilot
circuit