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=> Ger TRS
RX-C45LS
RX-C45LS
MEASUREMENTS AND ADJUSTMENTS
NDERTOR
m ALIGNMENT
ern
eee
BAND
oe
ee
pea
area:
ADJUSTMENT
REMARKS
MAIN CIRCUI
FM-RF ALIGNMENT
Variable
Output meter
L7 (FM OSC
(*2) Adjust for maxi-
capacitor
across
Coil)
mum output.
fully closed.
voice coil.
Connect to test point
Variable
WV through FM dummy
capacitor
"
CT3 (FM OSC
antenna.
Negative
fully open.
Trimmer)
LW
ANT
285kHz
LW Osc
Lw osc
136kHz
297kHz
un pac (S|, @
Lg
Be
le
ausse O©)
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
. Set volume control to maximum.
. Set fine tuning to center.
. Set graphic equalizer to center.
. Set mode switch to stereo.
. Set band switch to LW, MW, SW or FM.
. Set power source voltage to 12 V DC.
. Set balance control to center.
. Output of signal generator should be no higher than
. Set function switch to radio.
necessary to obtain an output reading.
m@ LW, MW and SW ALIGNMENT
side to test point Y .
Tune to signal.
L5 (FM ANT
Coil)
i
2) Adjust for maxi-
SIGNAL GENERATOR or
INDICATOR
ft
i
CT2 (FM ANT
mum output.
Sw OSC
SWEEP GENERATOR
RADIO DIAL
(ELECTRONICS
'
5.75 MHz
fo
ski
UO IER A Ser eec
ee
Lo
ata
Gee
CONNECTIONS
FREQUENCY
or SCOPE)
:
AM
IFT
455kHz
AM-IF ALIGNMENT
Fashion loop of
several turns of
455 kHz
Point of non-
Output meter
Adjust for maximum
wire and radiate
30% Mod.
interference. (on/
across voice coil.
T2 (AM IFT)
output.
signal into loop of
at 400 Hz
about 600 kHz)
receiver.
LW-RF ALIGNMENT
i
136 kHz
Tuning capacitor
a
L8 (LW OSC
7
fully closed.
Coil)
7
297 kHz
Tuning capacitor
CT7 (LW OSC
i
fully open.
Trimmer)
antenna.
Adjust for maximum
Reed side to test
145 kHz
Tune to signal.
(*1) L2 (LW
output. Adjust L2 by
P
:
ANT Coil)
moving
coil bobbin
Se
@ AUDIO ADJUSTMENT
Adjust for maximum
ITEM
INPUT
MEASUREMENT | SPECIFICATION
ADJUSTMENT
REMARKS
CT5 (LW ANT
output.
POINT
POINT
Trimmer)
Repeat steps
(9)
QZZCAC
Maximum
MW-RF ALIGNMENT
Azimuth
(10 kHz,
EXT SP
output.
Azimuth screw
Playback mode
511 kHz
i
L9 (MWOSC
Adjust for maximum
208)
luliotsed
cll
allel
Playback
QZZCLA
oe
VR101 (Lch)
Playback mode
1,650 kHz
Tuning capacitor
7
CT4 (MW OSC
7
level
(315 Hz, 0 dB)
Sen
420 mV
VR201 (Rech)
fully open.
Trimmer)
at
Adjust for maximum
;
550 kHz
Tune to signal.
(*1)L3(MW ANT | output. Adjust L3 by
Bias
Record mode
2)~(5
Coil)
moving coil bobbin
oscillation
ie
66.2+0.5 kHz
Beat proof switch—|
(*1) Cement antenna bobbin with wax after completing alignment.
(1)
=
el
FM SIGNAL
EQUIPMENT
GENERATOR
CONNECTION
ADJUSTMENT
SPECIFICATION
REMARKS
SOURCE
ELECTRONIC
CONNECTION
COUNTER
Adjustment of | 98 MHz, 60 dB (CW)
Sac
Adjust VR1, for 19 KHz
pilot signal.
Connect to test point
ae
VR1
(+100 Hz) reading on
WV through FM dummy
electronics counter.
along ferrite core.
frequency
Tape switch— Metal
Adjust for maximum
Record mode
140 +10 mv
VR301
Beat proof switch—|
Tape switch— Metal
Use metal
tape
CT1 (MW ANT
output.
Trimmer)
Repeat steps
(6)~(9).
= = =| =
Metal
SW-RF ALIGNMENT
Bias
Use metal
Metal 4.0+9-2MV | vR102 (Lch)
Record mode
current
tape
0.4
VR202 (Rch)
Beat proof switch |
(10)
(11)
Normal
Normal VR304
Tape switch—> Metal
5.75 MHz
Tuning capacitor
L10 (SW OSC
Adjust for maximum
fully closed.
Coil)
output.
-
-
2.0+0.2 mV
:
18.8 MHz
Tuning capacitor
7
CT8 (SW OSC
Connect to test point
fully open.
Trimmer)
VW through ceramic
capacitor (10 pF)
Negative side
to test point Y .
;
:
Adjust for maximum
(12)
5.9 MHz
Tune to signal.
L4 (SW ANT
output.
Coil)
Repeat steps
(10)~(12).
Qn!
on
|
2
. Apply a —57 dB (1.4 mV) 1 kHz
signal from the DIN input
terminal.
2. Measure the output voltage of
pins © and @ of IC5.
3. Then, with the unit in the record
in the level.
(Adjust to obtain 0+1 dB.)
*Output voltage reference value of
iit, | "Guat
a , Playback ocd p a r
Overall gain
—57 dB
Pin@...(+)Lch | Output... +Omv
Gan ny
End measure the cumeutvoliage
@ FM ALIGNMENT
ut,
(+) Leh
Pin®... {3} Reh
of pins © and @ of IC5.
BAND
SYEEE GENE NATOR
ee ee: |). SONS
| apdusTMeENt
REMARKS
pee easl)
adjust so there is no difference
FM-IF ALIGNMENT.
High side thru.
;
Connect vert.
IC5 pins ®@ and @... 380 mV.
(1)|
FM
0.001 .F to test —
10.7 MHz
Point of non-
amp. of scope to
Adjust for maximum
point YW , Negative
(SWP). | interference. (on/ | test point ©.
T1 (FM 1st IFT)
amplitude.
@ LED METER ALIGNMENTS
side to test point Y .
about 90 MHz)
Negative side to
(Refer to fig. 19).
test point YY.
ITEM
ADJUSTMENT
REMARKS
(2)
VR303
Adjust for maximum
FM
t
"
"
T3 (FM 2nd IFT)
amplitude.
Level check
1. Play back the test tape (QZZCLA).
(Refer to fig. 20).
2. Adjust VR303 so that the 4th LED from the left begins to iltuminate.
[8]
9
(10
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