Advertisement
eReplacement of the Foot..
1. Remove the 4 heat melted posts on the chassis with a pair of
nippers or similar tool.
2. To replace the foot (RKA0009-1) on the chassis, melt the 4 posts
with a soldering iron.
Heat Melted Posts
Foot
:
Soldering Iron
ay
Chassis
Se,
Foot
(RKAO009-1)
m@ MEASUREMENTS AND ADJUSTMENTS
m@ FM ADJUSTMENT
Control positions and equipment used
@ FM signal generator (FM-SG)
e@ Stereo modulator
@ Distortion analyser
@ Oscilloscope
@ Choke coil (100yH)
@ Resistor(100kQ)
@ Frequency counter
@ OC electronic voitmeter(EVM)
FM MONO DISTORTION ADJUSTMENT
1.Test equipment connection is shown in figure.
2.Set the unit to "FM" mode.
3.Set the radio frequency display and signal generator to
100.10MHz.
4.Adjust the core of T201 so that the voltage measured in
signal mode is OmV (0+20 mV) in 300 mV range.
5.Adjust T202 so that the distortion factor of L-CH is
minimized.
6.Repeat steps 4 and 5.
7.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
1.Test equipment connection is shown in figure.
2.Set the unit to "auto"
position.
3. Set the radio frequency display and signal genarator to
_ 100.10 MHz.
4.Adjust VR301
for 19kKHz+30Hz
on frequency counter
reading.
*USING ALTERNATE SYSTEM
1.Apply stereo signal from generator or receive the stereo
broadcast.
ore
2.Adjust VR301 until stereo indicator lights up. Fix the arm
of VR301
as shown in figure.
x
Se
ee
ae
aos
ie
Lqgo
FM SIGNAL GENERATOR CONDITION
Modulation
Modulation frequency
Output level
FM SIGNAL GENERATOR CONDITION ~~~ ~~
Modulation
0%
Modulation frequency
Output level... 6
"Stereo" OFF position
"Stereo" ON position.,
(Indicator lighting)
sesseaceeseee Adjust point of pilot
.
circuit
e ADJUSTMENT POINTS
FM ANT
3002477524
[
]
GND
AM LOOP ANT
OUTPUT
[ae
|
AM ANT
kL:
R
2201
FM FRONT-END PAC
L321
L322
S
8
Uf
6
re
L324
ae
TP202
1C30!
[ iczo1
eso a
aoe
FM MPX VCO
ieee
(19kHz)
FM
al
ae
offset
[ t202 |
[t201 |
m™ DESCRIPTION OF FL PANEL [FL901 (SAD8MT10ZYK)]
¢ GRID ASSIGNMENT
.
8G
a
stereo
7
LW
|
MWAM
af
CAFM
Note: ane grid of 3G and 8G are used for external connection.
° "em
Sonne'
couNerTIM
29 | 30 | 31 | 32 | [33 | 34 |
| 34 | 35 |
Advertisement
