Panasonic RX-FS50 User manual

ORDER NO. MDg806117A2
Service Manual
Radio Cassette
RX-FS50
Stereo Radio Cassette Recorder
Colour
(K) scere- Black Type
Areas
(EE) ---- CLS.
Tape Deck: SG20 Mechanism Series
Please file and use this manual together with the service manual for Model No. RX-FS50 (GU),
Order No. MD9804079C3.
Note:
This service manual is provided to indicate the differences between the original model No.
RX-FS50 (GU) and the subsequent model No. RX-FS50 (EE).
Specifications
< RX-FS50 (GU) > < RX-FS50 (EE) >
Intermediate frequency: Intermediate frequency:
FM 10.7MHz FM 10.7MHz
AM (MW/SW1/SW2) 455kHz AM (MW/SW1/SW2) 459kHz
Measurements and Adjustments < RX-FS50 (GU) Service Manual of pages 9 ~ 11. >
< RX-FS50 (GU) > < RX-FS50 (EE) >
[ Tuner Section] [ Tuner Section]
* AM-IF ALIGNMENT: * AM-IF ALIGNMENT:
Frequency 455kHz (T2) Frequency A59kHz (T2)
A, WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It
does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
Panasonic
© 1998 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying
and distribution is a violation of law.

RX-FS50
li Schematic Diagram
23 TUNER CIRCUIT [EE] MAIN ciRCuIT
<RX-FS50
(GU)
Service
Manual
of
page
13.>
<RX-FS50
(GU)
Service
Manual
of
page
15.>
Addition
TELESCOPIC
ANTENNA
Q380
2SC2001KTA
SWITCHING
Mi Printed Circuit Board Diagram
TUNER
P.C.B.
|
EE]
Main
P.c.B.
<RX-FS50
(GU)
Service
Manual
of
page
17.>
<RX-FS50
(GU)
Service
Manual
of
page
18.>
Deletion
Deletion
FM MODE
iBP
Addition

* RX-FS50
@ Replacement Parts List
Note: Mentioned in this parts list is only those different from Model No. RX-FS50 (GU) and the
subsequent model No. RX-FS50 (EE).
Part Number
Ref. No. Part Name & Description Remarks
RX-FS50 (GU) RX-FS50 (EE)
SWITCH(ES)
RSS2D32ZA-H RSS2D32ZA-A
SW, SELECTOR CHANGE
RESISTOR, 1/4W 150Q CHANGE |
R117 ERDS2FJ1R0 ERD2FCJ4R7 RESISTOR, 1/4W 4.79 CHANGE
ca es
Taiao—[enosaniina | | ——] pateron |
ERDS2FU1RO —————
RESISTOR, 1/4W 4.79 CHANGE
Frew [enosorniea | ————
R250 ERDS2FJ1RO0 ERD2FCJ4R7 RESISTOR, 1/4W 4.7 Q CHANGE
R311 ERDS2FJ102 ERDS2FJ391 RESISTOR, 1/4W 390 Q CHANGE
CAPACITORS
RESISTERS
R16 ERDS2FJ181 ERDS2FJ151
C2 ———______—— _ | ECBT1H102KB5 CAPACITOR, 50V. 1000PF ADDITION
ECBT1H1R5MC5 ECBT1H2R2KC5 CAPACITOR, 50V—s-2.2PF CHANGE
C901-04 ECKR1H103ZF5 | ECKR2H103ZF5 | CAPACITOR, 500V 0.01uF CHANGE
CABINET PARTS
REKGXFS50GUK RFKGXFS50EEK FRONT CABINET ASS’Y CHANGE
7A RKWX0122-Q RKWX0122B-Q DIAL PANEL CHANGE
Pe. RFKHXFS50GUK | REKHXFSSOEEK BACK CABINET ASS'Y CHANGE
PACKING MATERIAL
PI [ RPGX0467 RPGX0497 GIFT BOX CHANGE
ACCESSORIES
RQT4425-B
RQT4404-G O/| BOOK CHANGE
RQT4426-R
A3

ORDER NO. MD9804079C3
Service Manual
Radio Cassette
Stereo
Radio
Cassette
Recorder
RX-
FS
5
O
Colour
(K) ... Black Type
Areas
(GU) 2. cecse: Asia, Latin America,
Middle East and Africa.
(G1 04 apenas Saudi Arabia, Kuwait,
Singapore, Malaysia.
Tape Deck: SG20 Mechanism Series
Specifications
Radio:
Frequency range: General:
FM 88 -108 MHz Power requirement:
MW 530 - 1605 kHz AC 110 ~ 127 V/ 220 -240 V, 50/60 Hz
sw 2.3 — 7.0 MHz Power consumption: 13 W
SWw2 7.0 — 22.0 MHz Battery 9 V(Six R20/ LR20, D, UM-1 batteries)
Intermediate frequency: ®@ Do not use rechargeable type batteries.
FM 10.7 MHz Power output: 60 W (30 W x 2)... PMPO
AM(MW/SW1/SW2) 455 kHz Speakers:
Sensitivity: Woofer 10 cm PM Dynamic speaker,6Q
FM 4.5 wV/ 50 mW output (-3dB Limit Sens) Tweeter 1.5 cm Ceramic speaker
AM 125.9 wV/ m/ 50 mW output (Max Sens) Output: Headphones; 32Q, 63.5
swi 63.1 2V/ m/ 50 mW output (Max Sens) Dimensions (W x H x D): 480 x 171 x 160mm
Sw2 4.7 uV/ 50 mW output (Max Sens) — Weight: 2.8 kg without batteries
‘Tape recorder:
Track system: 4 track 2 channei stereo
Recording system: AC bias
Erasing system: Magnet —_ Note: Design and specifications are subject to change without notice.
Monitor system: Variable sound monitor Weight and dimensions are approximate.
Frequency range
Normal: 70-13000 Hz
Tape speed: 4.8 cm/s
A.WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It
does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
©1998 Matsushita Electric Industrial Co., Ltd.
— es All rights reserved. Unauthorized copying and
anasonic distribution is a violation of law.

Operation Checks and
Main Component Replacement Procedures........ a~ 8
Measurements and Adjustment ........scsssscosscsesecrerses 9~ Ti
Type Illustration of IC’s, Transistors and Diodes ........... 12
Schematic Diagram ............sssccccsesecersessesevesscessecsasees 12~ 15
Wiring Connection Diagrann .........0:csssecsscsesscsseasseesenses 16
Accessories
BAG Powel COM cc caesiivisaccaascdserdvinsssiesseavk waketoreavensteiaaeiie pe.
[RJA0004]...For (GU) area.
[RJA0019-2K]...For (GC) area.
CDs aicst Shah ley taalee sta Sisal ealanasatatee aot cos lee Tuning knob
acta aosceicutes ts tesh catia at Tea te ls oe Fine tuning knob
CS is sacict Beast asa eae ees Band selector knob
4)... vussseseese FM Stereo indicator
ij SEE er Cre OE Urea RC eee Selector knob
Oe ean ala act Et land Orcmostneneeol ids Tone knob
ee caste Laced ace eras ce cra arn oat in ace e Volume knob
CS) ihecteint a teint tech ete Built-in microphone
SS Printed Circuit Board Diagram
vonusnsidbecansigsvanscedsanoecteces 17,18
Cabinet
Parts
Location
........cscsccsssssssssccescsssscensescreccereres
19
Replacement
Parts
List
(Cabinet)
..........ccccccsceseseeccane
19
Mechanism
Parts
Location
........ciccscicsscesssesccesssecscesserseaens
20
Replacement
Parts
List
(Mechanism)
.....cccccsessccccrseeses
20
Replacement
Parts
List
(Electrical)
..........ccscccssesss
21,
22
PECANS
-cccsysiasetetsasasvdcusstanseaiguvnnsennsadecaecesccstesavess
Rvavcanciecs
23
Replacement
Parts
List
(Accessories&
Packing)
..........
23
®
AC
power
plug
adaptor
weidde
cic
nstanhes
sosslsiEye
cess
Fess
ensecereeree
ipe.
[RJP1SG02-H]...For (GU) area. -
[RJP1$G04-H]...For (GC) area.
Oe aeseece cl Meese FM mode/Beat proof (BP) selector knob
OY re arcsec tacit tet Headphones jack (¢3.5, 329)
Cath ett Aa te A he eee Record(@) button
Lay sats cia aiden sbcaeccsrsaiuagesqhnSentieea heleedaneceated Playback(<1) button
Oy recite ieyieas lacie oaePce toed Bice | Reverse(») button
UL) AORN ee ERT PON renee ent he ae Te CATS Cue (a4) button
(ee eR A ec ace ieee Stop/eject(@/ a): button
eel nae sedete cen Sates tesa euatee Raise foal aul adane seco Pause(is) button

| RX-FS50
Operation Checks and Component Replacement Procedures
| 1. This section describes procedures for checking the operation of the major printed circuit
hoards and replacing the main components.
2. For reassembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
3. Select item from the following index when checks or replacement are required.
4. Refer the parts No. on the page of “Main Component Replacement Procedures” , if necessary.
@Conients
Checking Procedures for each P.C.B. Page.
1. Checking for the tuner P.C.B.. - o 6 8 © 6 © © © ee 8 8 we et 8 ee et ee 8 eke ele klk tle 3,4.
4,5.
2. Checking for the main P.C.B..* * 2 2 © © © © © © © © 6 © ee ee ee oo oe oe oe ee ee ee
Main Component Replacement Procedures
1. Replacement for the pinch roller ass'y, erase head and rec/play head. +: * °°. 6
2. Replacement for the motor ass'y, main belt and fast forward beli.- - + + + =» 6.
3. Replacement for ihe speakers (Tweeter). - * © * © se © © © oe © ee eo ee eo oe ee ww oe we eZ
o ° e * e o e 2 o & « e * ° 2 > @ e e -. 7
7
4, Replacement for the cassetie lid ass'y. * + «5 #2 2 © © 2 2
5. Replacement for the handle.> «+ = © * * © s © © s 8 6 © © 6 e © ee eo eee 8 6 © ee ee oo oo
° ° e * e e
e * & © o ° e e r] 2 ° e ® % &
* co ° e
& Point “O” Adjustment: - + > -
Measure for Tape Trouble «© ° + * +o ee © es 6 «
| Checking Procedures for each P.C.B.
1. Checking for the tuner P.C.B. :
Press the stop/eject bution, and
ihen open the cassette lid ass'y.
Remove the
connector.
Cassette lid ass'y
Remove the front
cabinet ass'y.
Remove the battery cover.

RXA-FS50
2. Checking for the main P.C.B.
Ramoverthe jeadwiks - Follow the Giga of the item 1 in checking
from groove. ‘, procedure for each P.C.B. on pages 3 and 4.
Remove the 2 conneciors.
Connector (CF301) Connector (CP302)
Lead wire wespea an
Pull out the tuner P.C.B..
FM mode / BP knob
Volume knob
Remove the Tone knob
A
Selector knob
cc
4 knobs.
Remove the dial chassis.
* Release the 4 claws.
(Take care: not to
damage the claws.)
» Check the tuner P.C.B. as. shown below.
Main P.C:.B.
p
Remove
the
VC
gear.
Tuner
P.C.B.

Conneci the 2 connectors (CP301, CP302).
Connector
(CP301)
Mechanism “ ” Connector
unit (CP302)
+ Check the main P.C.B8. as shown below.
Insulation
material
Mechanism Main PCB.
unit
(Solder side)
Locaie ihe insulation material between the main P.C.B.
and the mechanism unit to prevent from short-circuit.
Boss
% For recording mode,
press the boss of rec/play
switch.
* When installing the main P.C.B., align the headphones
jack and LED holder with the hole of rear cabinet ass'y.
Holes
Headhpone jack
LED holder
| RX-FS50
Notice for installation of tuner P.C.B.
Band knob ,,
Band knob
° When installing the tuner
P.C.B., align the boss of
band switch with band knob.
FINE TUNING
« Roiate the FINE TUNING
knob until the stopper faces
downward.
Band switch Tuner P.C.B.
Main Component Replacement
Procedures
1. Replacement for the pinch roller, erase head
anc rec / play head
- Follow the @ (@ of the item 1 in checking
procedure for each P.C.B. on pages 3 and 4.
: Follow the » of the item 2 in checking
procedure for each P.C.B. on page 4.
i Removal of the pinch roller ass'y
° Release the 1 claw, and then
pull out the pinch roller ass’ y.
<<. Pinch roller ass'y
Slot of lever
> Notice for insiallation of pinch roller ass'y
The pinch roller ass'y spring should be aligned
with the sloi of lever.

RX-FS50 |
Removal of the rec/play head
1. Remove the 1 screw (@)).
2. Release the 2 claws, and ihen remove the rec/play head.
Rec/play head
@
f
installation of the main belt
Temporarily secure the main belt as show below.
Removal of the erase head
Release the 2 claws, and then
remove the erase head.
|
Erase head
2.
Replacement
for
the
motor
ass'y,
main
belt
:
Bg
5,
Fe”
Bae
tpotor
assy
and
fast
forward
belt
2
ihe mechanism unit.
-
Follow
the
&
of
the
item
1
in
checking
Main
belt
procedure for each P.C.B. on pages 3 and 4.
- Follow the @ 2 of the item 2 in checking
procedure for each P.C.B. on page 4.
Remove the motor ass'y
and moior bracket.
Main belt
GF
Main belt
Boss (A)
Tweezers
Remove the motor bracket.

| RX-FS50
3. Replacement for the speaker (Tweeter)
- Foliow the & » of the item 1 in checking
rocedure for each P.C.B. on page 3.
P pag Remove the cassette lid ass'y.
Tweeter [EFBS10D40A2]
Melting points
Py Re-installation
ae bosses
is
Cassette lid ass'y
Scratch the melting points (3 poinis) with cuiter.
Aiter replacemeni, install the speaker with melting the
re-installation bosses (4 points).
5. Replacement for the handle
4. Replacement for the cassette lid ass'y
: Foliow ihe & : » of the item 1 in checking
procedure for each P.C.B. on page 3.
install the cassette lid spring to the rib
temporarily.
Tilt the handle a
small amount.
Handle
Cassette lid spring
©)screwdriver
Release the claws with
© screwdriver, and then
remove the handle.
Push the legs of cassette sid ass'y in the direction
of arrow, and then release the cassette lid ass'y.

RX-FSSO
Point
“O”
Adjustment
Measure
for
Tape
Trouble
Rotate the shait fully in the
direction of arrow.
Install the VC gear so that marking ({})
is
located
on
upper
side.
*
If
cassette
tape
can
not
be
removed
from
the
deck
since
it
is
caught
by
the
capstan
or
pinch
roller,
insert”
a
thin
driver
into
the
hole
in
the
rear
side
of
this
unit
Pointer
and
remove
the
winded
tape
with
roiating
ihe
flywheel
ass'y
in
the
direction
of
arrow.
Dial chassis
Marking
Adjust
the
pointer
at the marking.
Pointer *
Rotate the VC gear fully
- in the direction of arrow.
Insiall the dial chassis
to the unit.

| RX-FS50
Measurements and Adjustments
[ Tuner Section ]
¢ ALIGNMENT INSTRUCTIONS
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
1.
Set
power
source
voliage
to
9V
DC.
5.
Set
FM
MODE/BP
switch
to
MONO/T.
2. Set volume control to maximum. 6. Set FINE TUNING to center.
3.
Set
band
switch
to
FM,
MW,
SWi
or
SW2.
7.
Output
of
signal
generator
should
be
no
higher
than
necessary
to
4,
Set
selector
switch
io
TAPE
or
RADIO.
obtain
an
output reading.
e AM - IF ALIGNMENT
Signal
Generator
or
bs
a
Indicator
.
Sweep
Generator
Radio
Bia!
(Electronic
Volimeter
poliestnett
Remarks
Setting : (Shown in Fig.1
Connections
Frequency
or
Oscilloscope)
9.1)
Fashion a loop of Point of non- Headphones Jack(32Q)
. 455 kHz 5 ; ‘
several tums of wire intereference. Fabricate the plug as shown in : ;
and
radiate
signal
30%
Mod.
(on/about
Fig.2
and
then
connect
the
Adjust
for
maximum
output.
: : at 400 Hz lead wires of the plug to the
into loop of receiver. 600kHz) measuring instrument.
o MW - RF ALIGNMENT
(GU)
....
511
KHZ
}
Tuning
capacitor
L8
(GC)
....
514
KHZ
|
fully
closed.
(MW
OSC.
Coil)
+3
KHz
Adjust for maximum output.
(GU)....1650
kHz
|
Tuning
capacitor
CT6
+5 kHz
[4] 3-1 Adjust for maximum output.
o
550
kHz
Tune
to
signal
(MW
ANT.
Goi)
Adjust
L3-1
by
moving
coil
j bobbin along the ferrite core.
Adjust for maximum output.
F CT5 : :
1500
kHz
Tune
to
signal
(MW
ANT.
Trimmer)
Adjust
for
maximum
output.
[*1] Fix antenna coil with wax after completing alignment.
e SWi - RF ALIGNMENT
Tuning capacitor L9
fully closed. (SW1 OSC. Coil) | Adiust for maximum output.
2.249 MHz
Tuning
capacitor
VC1-3
7231
MFZ
|
fully
opened.
(SW1
ANT.
VC1)
Adjust for maximum output.
Adjust for maximum output.
Adjust L3-2 by moving coil
bobbin along the ferrite core.
[4] L3-2
Tune to signal (SW1 ANT. Coil)
vC1-4
Tune to signal (SW1 ANT. VC1) Adjust for maximum output.

RX-FS50 |
e $W2 - RF ALIGNMENT
Signal Generator or Indicator Ai
Sweep Generator Radio Dial : justment
Setting (Electronic Voltmeter (Show in Fig.1) Remarks
Connections Frequency or Oscilloscope)
Headphones Jack(32Q)
Tuning capacitor Fabricate the plug. as shown in
Fig.2 and then connect the L100 Adjust for maximum output.
Connect to test point fully closed. lead wires of the plug to the||__ (SW2 OSC. Coil)
ihrough measuring instrument.
6.84 MHz
ceramic capacitor ae aah uciee OT7
uni i ;
(i OpF). 22.80 MHz fully pean (SW2 OSC. Trimmer) Adjust for maximum output.
Negative side to test
point
7.0 MHz Tune to signal L7 Adjust for maximum output.
(SW2 ANT. Coil)
e FM - (F ALIGNMENT
Connect to test
point BAEEEg through Point of noninter- | scope to test point ARSE - TH Waveform is shown in Fig.3.
ceramic
capacitor.
ference.
Negative
side
to
test
(FM
ist
IFT)
Negative
side
to
test
(on/about
90MHz)
3.
Connect vert amp. of
(FM Ae IFT) - Waveiorm is shown in Fig.4.
° FM - RP ALIGNMENT
Headphones Jack(3222)
Variable Fabricate the plug as shown in é :
86.2 MHz : le Adjust for maximum output.
Connect to test point 87.36 Mrz | Capacitor ‘fully. | |Fig.2 and then connect ihe)! «(ew O80. Coil} [*2)
sia closed. lead wires of the plug to the
through FM +50 kHz measuring instrument.
dummy antenna.
Negative side to test
109.2
MHz
|
Variable
VC-1
108.3
MHz
|
capacitor
fully
(FM
OSC.
VC1)
+70
kHz
|
opened.
Tune
to
signal
(=M
ener
Adjust
for
maximum
output.
[°2] Three output responses will be present; proper tuning is the center frequency.
[ Cassette Deck Section |
e ALIGNMENT INSTRUCTIONS
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
Measuring Instruments Measuring Conditions
® Digital frequency counter e Make sure the heads are clean.
@ Make sure the capstan and pressure rollers are clean.
Test Tape
® Tape speed adjusiment (2 kHz, -10 dB); QZZCWAT
Note: No Azimuth Head Alignment is required due io Aztec Head
is used in the cassette mechanism.
1O25

e TAPE SPEED ALIGNMENT
Test Tape
QZZCWAT
Headphones Jack(32Q)
Fabricate the plug as shown in
Fig.2 and then connect the
lead wires of the plug to the
measuring instrument.
@ Alignment Points
Equipment Connection Adjustment
Electronic counter
MOTOR VR
(Shown in Fig.5) 3000 + 60 Hz
FMANT SW1 ANT
106 MHz 7.0 MHz
MW ANT : SW2 ANT
550 kHz C) _ 7.0 MHz
Lo-1
FM ‘st Hep aye J SW1 ANT
10.7 MHz ides eae 2.3 MHz
eee
WQ
FM OSG 5 7231 MHz
86.2 MHz (GU) ;
: VCt-3
87.35 MHz , 3
+50 kHz (GC)
MW ANT
sec [oh 1500 kHz
455 kHz (a
{2 sw2 OSC
22.80 MHz
FM
2nd
10.7 MHz we ad
a
L9
FM OSG MW OSC MW OSC Swi OSC sw20SC
109.2 MHz(GU) 511 kHz (GU) 1650 kHz (GU) 2.249 MHz 6.84 MHz
108.3 MHz 5144+3kH2(GC) 1639 +5 kHz (GC)
£70 kHz(GC)
Fig.1
+
To headphones jack
R=322 R
Motor
To measuring
instrument
a |
| RX-FS50
1, Set the unit to ‘TAPE’ position.
2. Playback the middle part of the test tape
(QZZCWAT).
3. Adjust motor VR for output of 3000 + 60 Hz
shown on frequency counier.
Fig.3
Fig.4
O Motor VR
Fig.5

RX-FS5O |
|
Type
lilustration
of
IC’s,
Transistors
and
Diodes
|
LA1828 BA3313L
RVTDTC144EST RL154M11
Ca
_ Cathode
schematic Diagram
28C829D
28C2001K
28A1127-S
28C1685-QNC
Anode Cathode
s—S}— ca
(This
schematic
diagram
may
be
modified
at
any
time
with
the
development
of
new
technology.)
Notes:
2 S1-1 ~ Si ~ 8 : Selector switch to “FM” position.
(F...FM, M...MW, S1...SW1, S2...SWe2)}
¢ $301-1 ~ 3301-4 : Function select switch to “TAPE/OFF” position.
(T...TAPE/OFF, R...RADIO)
¢ $302-1 ~ $302- 6 : Record/Playback select switch to “PLAYBACK”
position.
(P...PLAYBACK, R...RECORD)
¢ 5303 : FM mode/BP select swiich to “MONO/ I” position.
(M/T...MONO/T, S/T... STEREO/1)
» $2 : Motor switch.
e $901: Voliage select switch “110 - 127V” position.
¢ VRSO1-1, VR301-2 : Tune adjusiment.
° VR302-1, VR302-2 : Volume adjustment.
e DC voltage measurements are taken with electronics voltmeter.
The negative terminal of the battery provides negative meter connec-
tion point.
No mark... TAPE PLAYBACK, < >..FM, ( )...AM.
* Important safety notice
Components identified by 4A mark have special characteristics impor-
tant for safety.
When replacing any of these components, use only manufactue’s speci-
fied parts.
e * mark indicate printed coil.
* Signal lines
<=> : FM signal line e=amp> : Tape playback signal line
[=—> : Record signal line e===® : Main signal line
aspese : +B line

RX-FS50
Signal lines c—> : FM signal line
TUNER CIRCUIT (P.C.Board:on page 17)
TELESCOPIC
ANTENNA
(ov)
ae 5v>
Ici
FMWAMIF AMP,DET/ | i +
AM OSC,MLUFM MPX i
oe aoe
Os 2. =f
(2.8)
Qi
28C329BTA
FM IF AMP

RX-FS50 |
®
Signal
lines
=>
:
FM
signal
line
axes
:
Tape
playback
signal
line
:
Record
signal
line
c=
:
Main
signal
line
MAIN
CIRCUIT
(P.C.Board:on
page
18)
pa0e
avoissisata. «RAN
1C302 i
BA3313L i
PLAY/REC AMP i
23C1584STA
BIAS OSC
$303
(FM MODE/BP)
"Rl
+
BUILT-IN
mie |)
AVTDTC144EST
SWITCHING
308

Soot
sssunslg
4
a
Lan
| RX-FS50
VeeiGHD S/C
OVERLOAD
1C301
LA4&6S2
POWER AMP
| RIPPLE
f FILTER
R356
56K
[ C250,,0.1 A240 1.2 R250 i
| C213''0.1 R220 1.2 R2i7 i
Cis0. 0.1 R140 1.2 R150
1
Cita, 0.1 R120 12° RW 1
pt Rey
c2n9 C109
1000P 1000P} BE
JK303
HEADPHONES
(43.5)
Q380
28C2001KTA
SWITCHING
1302
23AS564RTA
POWER SUPPLY
| Aso $301-3
f 28C2001KTA (SELECTOR)
REGULATOR A
c CESSES
MTIZJORSBTA
As oa01
; $2 E
#
(MOTOR
Sw)
i
(Reh)
mee
Cel
CERAMIC
TWEETER
1.5em
(Roh)
PM DYNAMIC
SPEAKER
10cm,6 @
q
q
48
q
BATTERY.6 R20/LR20(UM-1)
BATTERIES = 9V
BATTERY
* TERMINAL
CIRCUIT
(P.C.Board:
on page 18)
Ogrny
PM DYNAMIC
SPEAKER
10cm,6 Q
(Lch)
CERAMIC
TWEETER
1.5¢m
A\sso1
(VOLTAGE SELECTOR}
220-240V
O
NO-12V AC IN
A (ze0-240v )
. 220-240V
50/60Hz
0901-304
ALISaMit
POWER SUPPLY CIRCUIT (P.C.Board:on page 17)
Pane Eee

RX-FS50 |
Wiring Connection Diagram
POWER SUPPLY P.C.B.
VOLTAGE
SELECTOR AC IN
| BATTERY TERMINAL
P.C.B.
Ts9
é
a
(Power
transformer)
:
pea
dad
20(UM-1}
TELESCOPIC
ANTENMA
HIRED ywao2
WHT
TUNER P.C.B.
(Ach)
+
CERAMIC Sd
1.50m TWEETER =
PM DYNAMIC +
SPEAKER
10cm, 62
(Lch)
CEAAMIC
1.50m TWEETER
PM DYNAMIC
SPEAKER
10cm, 682
PHONES
MOTOR
weit:
. Ee eri
BUIKCAVAT- NOTE:
BLK:--Black SLD---Shiald
Se GRY---Gray WHT---White
(MOTOR SWITCH) RED---Red YEL---Yellow
— 16 —

Mi Printed Circuit Board Diagram
(This printed circuit board diagram may be modified at any time with development of new technology.)
Note: ¢ %* mark indicate printed coil.
A B
FY tuner pc.e.
For (GC)
area.
Fo
TELESCOPIC
ANTENNA
REPXO147A ... (GU)
REPX0147B .,. (GC}
POWER SUPPLY P.C.B.
AG IN VOLTAGE
(110~127V/220~240V 50/60Hz) SELECTOR
(REPX0148A)
CAUTION
RISK OF ELECTRIC SHOCK AC voltage line.
Please do not touct this portion.
eee be ae
RX-FS50