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TC901
L905
FM OSC
L903
L910
S01
T901
FM IFT
VR101
T101
T102
T103
T401
VR402
VR401
S02
L908
L912
L911
VR502
(TOP)
e—-—-— "S493
rReng —-
VIO,
eo ---- TE44:
TRIN
o——~ TP2cr
o————
"F103
————-- "F202
o———— FPIO2
(TEST POINT)
TPSsc!:———
TE502——_—
Figure
9 ALIGNMENT
POINT
=: oe
L909
T902
LW/MW
IFT
(BOTTOM)
|
GENERAL
ALIGNMENT
INSTRUCTIONS
Should it become necessary at any time to check the alignment of this receiver, proceed as follows:
1. Connect an output meter across the 7 Pin DIN Socket (L-ch or R-ch out put).
2. Set the volume control at maximum.
3. Attenuate the signals from the generator enough to swing the most sensitive range of the output meter.
4. Use a non-metallic alignment tool.
5. Repeat adjustments to insure good results.
LW/MW ALIGNMENT CHART
Set the band selector switch at LW or MW position.
a
a
_
ee
ee
SIGNAL
GENERATOR
RECEIVER
TEST
:
STEP | BAND | staGE | CONNECTION TO | INPUT SIGNAL
sienuadiceeeie
ee
ADJUSTMENT
RECEIVER
FREQUENCY
Connect signal genera-
| Exactly 450kHz
High end of display
Adjust for maxi-
T902
tor through a dummy
(400Hz, 30%,
(1602kHz)
mum output on
T1
,
MW
Ie
to the antenna socket.
| AM modulated)
7 Pin DIN Socket.
Ground lead to the
|
receiver chassis.
|
!
(Refer to Figure 10.)
:
2
| MW
Repeat until no further improvement can be made.
|
Lowend of display
| Connect DC volt
Adjust the MW oscillator'
—
| ae
|
|
| (531kHz)
meter between MW | coil L909.
:
|
:
|
!
Vt terminal of
Band
|
!
|
tuner and ground.
3
| ;
MW
| Cover:
|
Adjust DC volt
meter 1.5V+0.2V.
High end of display
Adjust DC voit
Adjust the MW oscilator
(1602kHz)
! meter 8.0V+0.5V.
| trimmer TC902.
|
| Same as step 1.
|
|
|
| Same as step 1.
| Exactly 603kHz
| 603kHz
|
|
(400Hz, 30%,
| AM modulated)
Repeat steps 3 and 4 until no further improvement
can be made.
|
:
|
|
|
>
-
|
os
' Low end of display
| Same as Step 3.
| Adjust the LW oscillator
|
L907, L908.
Adjust the MW
RF Coil
|
!
!
|
}
'
_—
|
.
«
H
P
:
|
Band
|
ez
" (155kHzi
| Adjust DC volt
| Coil L912.
|
!
|
:
'
joe
| meter
1.6V+0.2V.
6
LW
|
Cover-
|
ame at
!
|
ee
an
ae
r c a
a r m a s
ny ona
:
|
ye
a
eee
~ High end of display
: Check DC volt
ae
wee
~ (281kHz)
— meter 5.3V=:0.5V.
|
ne
—
pie
ala
Re eiruties.
he
Sy ghun ts Bet 5 AR ee oe cde tc ara
gana telctnaBetoa tt Z o n
and
aah Nee mage"
Soe hee
ener peg
ght
ges |
23
ae
ear rere reRTRPOTEES
et ew
Sombie,
| Same as step 1.
Exactly
164MHz
| 164kHz
, Same as step 1.
: Adjust the LW
RF coil
7
EW:
ss a
|
—(400Hz, 30%,
|
| L910, L911.
|
|
|
fee
AM modulated)
|
!
:
eee
eee eer eee! 2
=
ere DE
EEN ID
ee
ee
ee eee ee ee
eee,
i
,
8
: LW
|
Repeat steps 6 and 7 until no further improvement can be made.
Ee Reeee reveled Dee eee See ooo
EEE re
ene ae eee ere ee
.
eee
ee ae
R
15PF
TO
EXT.
ANTENNA
SOCKET.
R = 80-Z (ohm)
Z = OUTPUT
IMPEDANCE
OF
SIGNAL
GENERATOR
TO CHASSIS
GROUND.
Figure 10 AM DUMMY
410=
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