Panasonic RX-C45LS - Mechanism Parts Location

RX-C45LS RX-C45LS
SIGNAL
GENERATOR
or
INDICATOR
@
ALIGNMENT
POINTS
«Please
refer
to
Circuit
Boad
and
Wiring
Connection
Diagram
which
is
located
test
poits.
RAT
BAND
SEE
SCENE
NACE
pO
OS
|)
EON?
|!
<ADUUSTMENT
REMARKS
MAIN
CIRCUIT
BOARD
METER
CIRCUIT
BOARD
CONNECTIONS
|
FREQUENCY
FM-RF ALIGNMENT SWNT ©
: ; [ets }}-__-.@ : MW ANT: CURRENT
Variable Output meter L7 (FM OSC (*2) Adjust for maxi- eS, SSOkH2 (NORMAL) |
87.5 MHz capacitor across Coil) mum output. PLAYBACK
fully closed. voice coil.
Connect to test point Variable © © aveack CURR
V through FM dummy | 108 MHz capacitor CT3 (FM OSC Ase @i_ LEveviten @—{vr301 |
antenna. Negative fully open. Trimmer) ar
side to test point Y . (45kH2 (al EG
Tune
to
signal.
L5
(FM
ANT
swosc
@(O]
zi
18.8
MHz
®
OVERALL
Coil) fe) GAIN (Rch)
OVERALL [vR203|
F 8
(#2) Adjust for maxi- Lio .
106
MHz
”
CT2
(FM
ANT
mum
output.
SW
o8¢
®
GAIN
(Lch)
Trimmer)
Repeat
steps
;
FM
OSC
BIAS
BIAS
(3)~(6). MWOSC FM OSC : CURRENT CURRENT
AM IFT 1650kHz 108MHz (METAL )(R ch) (METAL) (Lech)
were ©
vco
FM 2nd I9kHz
i
10.7
MHz
@®
@
BIAS
OSC
r maximum
FM SIGNAL EQUIPMENT Fig. 18
GENERATOR CONNECTION ADJUSTMENT SPECIFICATION REMARKS : :
SOURCE ELECTRONIC A
CONNECTION COUNTER :
Adjustment of | 98 MHz, 60 dB (CW) ieee Adjust VR1, for 19 KHz
pilot signal. Connect to test point Pes VR1 (£100 Hz) reading on
VW through FM dummy electronics counter.
antenna.
“(iasnlini Negative side to test
djustL2 by point YW.
ol in
Fis Core: @ AUDIO ADJUSTMENT
rmaximum ITEM INPUT MEASUREMENT | SPECIFICATION ADJUSTMENT REMARKS
POINT POINT : .
teps a © Fig. 19 Fig. 20
Azimuth (10 kHz, EXT SP output. Azimuth screw Playback mode
eee) MECHANISM PARTS LOCATION
level (315 Hz, 0 dB) sek 420 mV VR201 (Rch)
rmaximum
rite core.
rmaximum
M115 M108 ?.
r maximum
djust
L3
by
Bias
i
Record
mode
pov
oil bobbin oscillation bed 66.2+0.5 kHz L301 Beat proof switch—| ;
frequency Tape switch— Metal
teps
Erase Use metal ned Record mode
current tape a 140 +0 mv VR301 Beat proof switch—>|
Tape switch— Metal
Metal
Bias Use metal ty Metal 4.0+9-2MV | yR102 (Lch) Record mode
current tape wars 0.4 VR202 (Rch) Beat proof switch—|
Gas Normal Normal VR304 Tape switch— Metal
2.0+0.2 mV
r maximum
. Apply a —57 dB (1.4 mV) 1 kHz tho e. M39 g y
signal
from
the
DIN
input
By
eee
he
M36
M40
terminal.
iL
4
M213
M232
. Measure the output voltage of cael 2) Sea ®
pins © and @ of ICS. || M212 M26 M213 M31 nN
. Then, with the unit in the record (¢ ; ee
pl ve DIN Jack mode, record a signal. ; ak is Mas
ee
Output
VR103
(Lch)
.
Playback
the
recorded
part,
M30-S
OS
Overall gain ~57 dB Pin®... (+) Loh | Output... +0MV | yR903 (Rch) and measure the output voltage e
Pin®... (+) Reh of pins © and @ of IC5. +34
Pin®...(-)
.
Compare
the
output
voltage
;
——M120
measured in items 2 and 4, and
adjust so there is no difference
in the level.
(Adjust to obtain 0+1 dB.)
*Output voltage reference value of
IC5 pins @ and @ .. . 380 mV.
35 M231
“maximum
: is @ LED METER ALIGNMENTS
ig. 19).
ITEM ADJUSTMENT
Level check VR303
REMARKS
“maximum
fig. 20).
1. Play back the test tape (QZZCLA).
2. Adjust VR303 so that the 4th LED from the left begins to iltuminate.