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gw ALIGNMENT
INSTRUCTIONS ... FM AND AM TUNER CIRCUIT
NOTE
For adjustment, proceed with the bottom board attached as it is.
Notes:
FM (FM Alignment)
6) Volume control:
ss
8.ehsc3
oe espe
8 Variable
2. FM Muting/mode switch ........ on/FM auto
7. Output of signal generator should be no higher than necessary
3. Maintain line voltage at rated voltage.
to obtain an output reading.
4. Tape monitor switch. .........-.--.
Source
8. 3009
FM dummy antenna..... Refer to fig. 7.
+
AM/FM SIGNAL GENERATOR
DIAL
INDICATOR
ADJUSTMENT
{VTVM or SCOPE)
POINTS
REMARKS
connection
_|FReauency,
SETTING
| (pisTORTION METER)
AM ALIGNMENT
AM signal generator high
] 455kHz
or TP201 of set.
L201 {ANT Coil)
by moving coil bobbin
signal into loop of receiver | with 400Hz)
along ferrite core.
FM IF ALIGNMENT
FM RF ALIGNMENT
dummy antenna.
FM MONO DISTORTION ALIGNMENT
Connect FM signal gene-
;
:
Tuning at 1OOMHz
7 |rator to 3002 FM antenna
Toe kia
datas te
eee
T101 (Discri IFT)
and adjust for mini-
terminals through FM
with '400Kz)
heeeinel et ot pea
Secondary [B]
mum distortion.
dummy antenna.
:
Repeat steps (4) and (7).
FM SIGNAL METER
ALIGNMENT
Connect FM signal gene-
FM Muting/Mode switch
F rator to 300 2 FM antenna | 1QQMHz
to "off/FM mono".
terminals through
(100% Mod.
100MHz
Signal meter of set.
VR102
Adjust VR102 to
es a
ore Abs A
with 400Hz)
about '4.7' on signal
t
mM
:
pply
meter scale.
FM MUTING
LEVEL ALIGNMENT
Connect FM signal gene-
F
rator to 3002 FM antenna } i q9MHz
Connect VTVM or
FM Maal eual aie
9| terminals through
v4
100MHz
scope to speaker (L or R)
Switehtono8
FM dummy antenna.
{100% ee
terminal of set
VBIOF
SUtO:
Apply 16dB (6.34V)to set.
with 400Hz)
:
Adjust so that outptt
can be obtained.
ISG indication are 28dB(IHF)
FM MPX PILOT ALIGNMENT
S8MHz
Non-modulated
mono
signal applied to set.
1.
10 2. FM Muting/Mode switch to ''on/FM auto".
2. Adjust VR301
until stereo indicator lights up.
3. Connect frequency counter to TP301 through resistor (100 kQ).
Cement arm of VR301 as shown in fig. 8.
4
Adjust VR301
to 19kHz +30Hz.
STEREO
SEPARATION
ALIGNMENT
|
Notes:
1. Stereo modulator
........-..
* Connect stereo modulator output to EXT. MOD. terminal of signal generator.
«Interna! OSC
..... 1KHz
*Pilot signal modulation
..........
10%
2.
FM signal generator.......... + Frequency approximately
100MHz.
+Output level to 72dB (IHF)
«Modulation mode to FM
3. Band selector switch .........
FM
4.
FM Muting/mode switch......-...--.
on/FM auto
FM SIGNAL GENERATOR
STEREO MODULATOR
INDICATOR
ADJUSTMENT
REMARK
(VTVM or SCOPE)
POINT
Connect VTVM
or scope to
output terminals through low pass
filter. Refer to fig. 9.
MODE
AND MOD. RATE
CONNECTION
Adjust for minimum
right (and left) outpur
L (and R)
30% Modulation
"1
300
FM antenna terminals
VR302
through FM dummy antenna
c
1
i
1
i
|
1259
|
rene
ToSG
|
750
| To Receiver
To Receiver
|
Iv
3%, Output
(SG
imp.
752)
!
Mieter
p
|
'
|
1500
!
1K
|
VR301
t
i
bo.
4
A~B, D—E: Stereo OFF Position.
Mae yt
,
3002
FM
Dummy
Antenna
B-D:
Stereo ON Position (Indicator Lighting).
LOW PASS FILTER
Cc:
Adjust Point of Pilot Circuit
(fe = 15kHz ~19kHz)
ig. 7 (Abb. 7
7
Fig. 7 (
)
Fig. 8 (Abb. 8)
Fig. 9 (Abb. 9)
[6] SA-5270
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