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... . . . .
ALIGNMENT
PROCEDURES
MAIN PARTS IDENTIFICATION
ILLUSTRATION
MAIN
P.C.
B.
TOP
VIEW
1. General
a) Test Conditions
Signal
generator
output:
Modulation
frequency
(AM)
1 kHz (FM)
1 kHz
Modulation
percentage
(AM)
300/0 (FM)
22.5 kHz
Signal
level just high enough
to prowde
meter deflection.
Signal
application:
Antenna
receptacle
through
the dummy
an!enna.
Outp,Jt meter connection:
Accross
speaker
or dummy
load (4 ohms).
Setting
of radio controls:
Tone control
at center
positoion.
Power supply
14.4V.
* Location
of the components
for alignment
are shown
in
MAIN PARTS IDENTIFICATION
ILLUSTRATION
(TOP VIEW).
&VR2(
~SVR120
TUNER
TP21
0
0
0
0
i
Head
Azimuth
Alignment
1,
Insert a BASF 10kHz standard
test tape and set the unit in play mode.
2. Tune the azimuth
adjusting
screw (1) until you obtain
maximum
reading
on the VTVM at the foward
position.
3. Tune the azimuth
adjusting
screw (2) until you obtain max]mum
reading
on the VTVM at the reverse
position.
1
VR
r
Dolby
level Alignment
1.
Test tape : MTT-150 (DOLBY
B-TYPE TONE)
2, Function
: DOLBY SW . . . . .. OFF
3. Adjustment
method
Play the test tape at the forward
position
and adjust
respectively
the
SVR20, 120 to get 337mV at TP21.
Check
the output
level of TP21,
at
the reverse
position
within
limit.
(337mV *1 .OdB)
m
AZIMUTH
SCREW(2)
HEAD
@
@
FOR REVERSE
@
AZIMUTH
SCREW(
I )
FOR FORWARD
MECHANISM
IC BLOCK
DIAGRAM
TA8221
H
MC14053BFB
MN1280-P
I
B;!IARY 10 1-oF-2
A
CIECCXIER
WITH
a
INHIBIT
2
0
PROTECTOR
LOAD tlJMP
StiDRT CIRCUIT
L-W
Xo
xi
Yo
Y1
Zo
21
1
I
I
1
1
.
.
J
PRE-GND
STANO-BY
Sw
&
fJ
J
HA12134FP
TC4S01
F
2EZ IN
GN D
?9 IN
BIAS
REC/?9
PB OUT
DE?
REC OUT
I
M
INBI
5 VDD
INA2
v~~
3
4 OUTX
REC I N
$"'C ~
?B IN
VREF
?6 WT
ON/';F~
DET
i?FC OUT
–l–
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