Panasonic SG-J500 (K) User manual

Service Manual
MW/FM STEREO RADIO WITH
CASSETTE TAPE DECK AND
RECORD PLAYER
ORDER NO. SD83072600C2
Portable Stereo
SG-J500 (K), (W)
[EX]
[EX]: Denmark,
Specifications
AMPLIFIER SECTION
POWer OUtPUt .....05..cisvsnssiccsereseess AC: MPO 4W x 2 (THD 10%, 62)
RMS 1.9W x 2 (THD 10%, 6)
DC: RMS 3W x 2 (THD 10%, 62)
FM TUNER SECTION
Frequency Rangeé.............::cecceeees 87.5 MHz ~ 108 MHz
Intermediate Frequency (IF)............ 10.7 MHz
Sensitivity .. 2.8 uV (at 1 kHz, 40 kHz) (DIN) at 752
Stereo Separation..............ecee 34 dB (at 1 kHz, 60 dB, 40 kHz)
AM TUNER SECTION
Frequency [email protected]:cccceeees 525 kHz ~ 1605 kHz
(571m ~ 187 m)
Intermediate Frequency (IF)............ 450 kHz
SONSIIVIRY <scccicsrsiveseccssesssncenccaazerevees 220 uV/m (1 MHz)
TAPE DECK SECTION
Deck System isccccsicsesssssssernceossoantonny Auto stop
Track System. ... 4-Track, 2-Channel
Head Type. ..... .. Hard Permalloy (Rec/Play)
Double Gap Ferrite (Erase)
Recording System ...........:::c:eeee AC Bias (50 kHz)
Erasing System.. .. AC Erase (50 kHz)
Tape Speed........... .. 4.8 cm/sec.
Frequency Response .. 50 Hz ~ 12 kHz
Signal/Noise Ratio .. 50 dB (DIN)
WOW SclFIUtteh ni c.cesecvascccccesssonisncs 0.2% (WRMS)
Panasonic
Finland
PHONO SECTION
Turntable System ..........ccccccceeeeeee Belt drive
Turntable Platter... . 16cm
Turntable Speed ..............cccceceeeeee 33-1/3 rpm and 45 rpm
PRONO-MOtOl ..sscisersissscvessesseccacsunns Electro-Governor DC Motor
Cartridge .. Ceramic cartridge (EPC-13STH)
RPI ass casted cevesnaneuivecchseemeeoniaiensiseadk Sapphire tip (EPS-41ST)
Stylus Pressure Range..............05 5.99
SPEAKER SYSTEM
SHOGNOE siccccicccnetnnuutiinneteianuiies 12 cm Dynamic Speaker
Input Impedance................. eee 62
GENERAL
Power Consumption...................005 15W
Power Supply wciccisscsrcsssccessssssnsvescees AC 110V/120V/220V/240V, 50/60 Hz
Battery: 12V (8 x UM-1, “D” size battery)
Car battery: optional car adaptor
395 mm x 273 mm x 209 mm
WIGKE vice. cciecsascscveroivancucexeusbegrecs 5 kg (without batteries)
5.8 kg (with batteries)
* Specifications are subject to change without notice for further improvement.
Matsushita Electric Trading Co., Ltd.
P.O. Box 288, Central Osaka, Japan

CONTENTS
Page Page
SPOCIPICATIONS..........ccececccneeesserceeetessceadencccsseasseeceneeeeeesenssoees 1 IE BIO CK DAG GAIN seicaicscin cise sosenstonwonaudeehatarmnuncbedevnumueen dienes 3
OCAUSIT OF COMUOIS i css schoncatcadeedanracenededendendeucoulwenniconel eters Z. Parts Location of Cabinet and Chassis................000000 15
Disassembly Instructions ................ccccccceeeeeeceeeeeeeeeeeeeeeeeees 3 Replacement Parts List of Cabinet and Chassis............... 16
Measurements and Adjustment ...............:::ccceeeeeeeeeees 4~6 Parts Location of Record Playet.....................00.cccccecceeseeees 17
Tape Deck Service Aid............cceceeececccceceeteeeeeeeettteeeeeeeeees 6 Replacement Parts List of Record Player..............0000.00 17
WIRING (COMME CHO NS :oeaseasextocecentives seeoasnseredsaecneemaymacnonenacensets Parts Location of Cassette Tape Deck... 18
Replacement Parts List Replacement Parts List of Cassette Tape Deck... «ws 19
SCHEMATIC DIAQa Mes nescevcerseass cexsonuescxnnss vested teeseedmesnrateta: BIOGK: Dia G Pani sicsosscdassnaddacass tuesecensdnadscaabamuatnesinesaaneastaisvans 20
Circuit BOard 00... 0.00... ccccceccce cece eeeeceecesesuueeessessseeesssaneseuaees
LOCATION OF CONTROLS
Volume
Control
i
Cassette
Button
(
pare
stop/eject,
|
, rew, play, rec
Mic Jack
Headphone Jack Tuning Control
Player Lid
Tone Control
Player
Open
Button
Function
Button
(
apap
ened
ye
)
Telescopic Ant. AC IN Jack DC IN Jack (13.2 V)
Voltage Selector
ae - : Accessory Box

DISASSEMBLY INSTRUCTIONS
@
Remove
the
Power
Cord,
Battery
@
Remove
the
Cabinet
®
Remove
the
Front
Panel
and
Bracket
@ Connector
“UI Battery Lid
@® Remove the Power P. C. Board
Chassis Ass’y
w/P. C. Board
@ Reinstall the Front Panel-2
= To Replace the Parts on P. C. Board
Cabinet
Main
P.C.
Board
..............
Referto@~@O
my
Power
P.C.
Board..............
Refer
to
1)
~0,9
=
To
Remove
the
Cassette
Deck..........
Refer
to
@
~
@.6
=
To
Remove
the
Chassis
Ass’'y
..........
Referto@
~
86.0.60,0
=
To
Remove
the
Player...............
Refer
to
@
~
8,6
®
To
Reinstall
the
Front
Panel
...........
Referto@,@.0.0

MEASUREMENTS AND ADJUSTMENT
@ Radio
Control Positions
@ Volume Control
@ Tone Control
@ FM Mode Selector
Maximum
FM AUTO
Audible level of speaker sound (AM-RF, FM-RF); Minimum (AM-IF, FM-IF).
@ Output of signal generator should be no higher than necessary to obtain output reading.
@ Make certain that speaker system is connected to the receiver when aligning (or use relivant dummy load resistors).
AM-IF ALIGNMENT
Test equipment connection is shown in figure.
Place unit into AM position.
Place the radio dial setting to point of noninterference.
Adjust T202 and T203 for maximum output and sym-
metrical curve.
GENESCOPE CONDITION
Frequency 450k Hz
1F-GENESCOPE
(TP203)
(TP202)
MW-RF ALIGNMENT
1.
2;
Test equipment connection is shown in figure.
Place unit into MW position.
Place the radio dial and signal generator setting to 513 kHz.
(Set the dial pointer to the left end of the scale or
lower frequency edge.)
Adjust L205 for maximum output.
Place the radio dial and signal generator setting to 600 kHz.
Adjust L201 for maximum output.
Place the radio dial and signal generator setting to 1645
kHz.
(Set the dial pointer to the right end of the scale or up-
per frequency edge.)
Adjust CT202 for maximum output.
Place the radio dial and signal generator setting to 1645
kHz.
. Adjust CT201 for maximum output.
Repeat steps 3. ~ 10.
F
M
-IF ALIGNMENT
Test equipment connection is shown in figure.
Place unit into FM position.
Place the radio dial setting to point of noninterference.
Adjust T7101 for maximum amplitude and symmetrical
curve. (Refer to Fig. 1)
Adjust T201 for maximum amplitude and proper linearity
between about + 100 kHz markers. (Refer to Fig. 2)
Note: Before aligning, turn the corest of T201 fully counter-
clockwise.
AM SIGNAL GENERATOR CONDITION
Modulation
Modulation Frequency
30%
400 Hz
AM SIGNAL GENERATOR
OSCILLO-
AC VTVM_ SCOPE
GENESCOPE CONDITION
Frequency
IF GENESCOPE
FM-RF ALIGNMENT
Test equipment connection is shown in figure.
Place unit into FM position.
Place the radio dial and signal generator setting to 87.3
MHz.
(Set the dial pointer to the left end of the scale or
lower frequency edge.)
Adjust L101 and L102 for maximum output.
Place the radio dial and signal generator setting to 108.6
MHz.
(Set the dial pointer to the right end of the scale or up-
per frequency edge.)
Adjust CT101 and CT102 for maximum output.
Repeat steps 3. ~ 6.
Note: As three output reading will be present, adjustments
must be made at center frequency.
FM SIGNAL GENERATOR CONDITION
Modulation s .. - 30%
Modulation Frequenc . . 400 H
ay OSCILLO-
AC VTVM P.
FM SIGNAL GENERATOR CNT pian:
Dummy
Antenna J (tP102)
(TP302)
Terminal

MEASUREMENTS AND ADJUSTMENT
@ Radio
FM STEREO ALIGNMENT (FREE RUN) ; STEREO SIGNAL GENERATOR CONDITION
. Test equipment connection is shown in figure. Modulation ; 0%
ei Pe Pilot ‘ nore 19%
Place unit into FM AUTO position. ; FM SIGNAL GENERATOR CONDITION
Place the. radio dial and signal generator setting to 98 Output Level 60
MHz.
Adjust VR301 for 19 kHz +50 Hz on frequency counter
reading.
Tune a stereo broadcast and confirm the frequency stays at FREQUENCY
19 kHz ° COUNTER
: gtenna | 3irP102\(TP301) ste
MPX-SIGNAL GENERATOR
FM SIGNAL GENERATOR . a(TP302KTPSO2}o
Sees
02 ‘
sc! 452 cet
em 602
ADJUSTMENT POINTS
ANT OSC OSC ANT
-_ | Fe
SG-J500 (MX)(EX)

MEASUREMENTS AND ADJUSTMENT
ae AZIMUTH ALIGNMENT
Test equipment connection is shown in figure.
. Playback test tape QZZCAC. (10 kHz, —20 dB) Speaker
. Adjust screw ® for maximum indication for equal output Terminals
on both channels.
_ After alignment, lock the head adjust screw @ with
lacquer.
VTVM OSCILLOSCOPE
ERASE BIAS ALIGNMENT
1. Test equipment connection is shown in figure.
2. Place unit into TAPE position.
3. Place cassette deck into recording mode. a
4. Adjust VR803 for 10.5V +0.5V on VTVM.
(TP801)
(TP802) o
KN Blade
‘Screwdriver
TAPE DECK SERVICE AID
When the cassette tape is caught around the capstan
shaft:
Remove 7 screws on the cabinet, and open the front panel,
then turn the flywheel counterclockwise.
Front Panel

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REPLACEMENT PARTS LIST
NOTE:
1. Important safety notice:
Components identified by A. mark have special characteristics important for
safety. When replacing any of these components, use only manufacturer's
specified parts.
2. Parts No. listed in this Parts List are Service Parts.
Description
Part No. (Unit: 2)
ERD2SFI4R7 4.7
ERD2SFJ1S2 1.Sk
ERDZSFJ472 4.7
ERD2SSFUS61 S360
ERD2SSFIS61 Hoo
ERD25TJ223
Numbering System of Resister
25 a 467
Type Wattage Tolerance Value scab hackle a 7 a
ERDZSFJ472 47k
Three Letters i | One or Two Letters Two or Three Letters| [Three or Four Letters ERDSSFISRS 6.8
Example:
Sere
“Sd
—
ERD
25
TJ
101
ERDZSFJ471
470
3 A ERDEFCJ4R7F 4.7
R904 A ERDSFCJU4R7F 4.7
Resistor Type Tolerance
> +1%
J: +5%
: +10%
Carbon Film
ERC: Solid
ERX: Metal Film
ERG: Metal Oxide Film
ERO: High Stability Metal Film
ERF: Flaneproof Wire-Wound Bath-Tube
ERQ: Fuse Type Metal Film
Chip
Description
(Unit: Q)
Part No.
Description
(Unit: Q)
R412 ERD2Z57TI153 15k
R415 ERD25TJ1 18k
' R414 ERDZ5TJiS= 18k
R1ds R415 ERD25FUIS62 5.k
R103 R416 ERD25FI562 5.6k
R104 nee =. 3
R106 a
RLO?
R108 get
RLOF =
47
47
ERDZSFI479 47
Riio
R425 ERD25TJ105 1M
R426 ERD25TJ105 iM
= R427 ERD25TI104 100k
ERD2STJ474 es ane nas
ERD2SEJ182 123k R428 ERD25S7TI104 100k
R429 ERD25TJ273 27k
‘ ERD2STJ273 27k
ERD2SFJ102
ERD2SFJ102
ERD2SFJ4R7
ERD2SFJZ21
ERD2SFJ6S82
ERD2SFU471
ERD2SFJ102
ERD2S5TJ474
ERDZSFUS62
ERDZSFJ120
ERD2STJ1S3
ERD257TJ153
ERDZSFI4
ERDESFJU4
ERD2STJ153
ERD25TJ15°
ERDZSTJIS3
ERD2STJIAISS
ERD2SFJ472
ERD2SFJ101
ERD2SFJ102
ERD2SFJ470
clin cps aa
25TI104
ERD25TJ274
ERD2ST327
ERD2SFJaBo
ERD25FJ680
ERD25Fd222
ERD2SFJ222
ERD25TJ1@3
ERD257TJ183
ERD2STJ1iS3
OZ Bpeceroeri
ReOS ERD2STJ393

SCHEMATIC DIA
FM
RF
AMP
MIX
&
OSC
AGC
AFC
FM
IF
AMP
T2032),
sig
Te0
IC
101
TP1Ol
Q
lol
HK
A
4
AN7213
2SC
1359
‘
7
|
RIOT
CF201
¢
cere
|
AF
AMP
ot}
sleai
i
Q201
een
=
ee
Ig
2SA733
|
°
=|
———
J2
)
a
:
bs
Rais
R210
IK
s
TP 202
O
J22P
RIO9 68
FH
cv iol
IK
clol
R108
Ic20ol
= 50 VI
3 H $
al eal Cad a ll a | ik
5
vv
oO
fo}
ey
DAMPER
D201
IOEI
FM/AM IF} AMP, DET,AM MIX
& OSC
1c20l
AN7220A 7 AVC
ro) D202
SF3-1
(FM Move» | & MA !05S1
0 MONO
f R209 100
a
28
470
"el ©—@
SWITCHING
D203
MA I50O
Fi- - = Z
nk i MIC AMP (TAPE) (PHONO) (TAPE) (PHONO)
Raaz case as ZO Oo TO TOO rome)
g 803,804
3 - = 2SD1302
al a
e PRE AMP ex ae
IC 401 a z2 z2S R503
APC 1228H = ri oe
sT-i
REC
AMP
sis
Sx
0403, 404 2803 |[o| ¢ 848.| | 38
’ 1c40! = = i
i
2SC945L
|
0
()
2°
|
<Sk_
|
Rsos
Ra19 3.3K Dm Oeaoar sy | Sf ep ap
R417
c4i9
|
R425 c423
ra
9
°
nS
R415
5.6K
3.3K
50V4I
IM
KO.9022
c4ol
$
$
8
i
~ H 16 MIO
el | 3
3 2
3 g R429 3s 8
Loh —+ sled ze 6 gy
TP803
TP804
0
ae
R412
g
0 + 1/5 15K x °
+ eo ¢5 = re g os
re)
5°
fo)
0 rey
R/P HEAD ele 8 s} oy
R420 3.3K = ot] a g €
raise 56k | 315K 50V4 Ko_0022 es) ©
R
ch——
3
—t
Z|
s
8
3
Dp
L
sl] 21 coe
=
g
2
-
R819
22K
= @ |x %04
| sls 3s : MUT ING
a 38 2401, 402 oe
8
a2
2SD
1302
aot
R60!
3.9K
5 $ KR R431 1K
®
m
=
R602
3.9K
=
TH
+|
2
=I
of S| d= oh R432. 1K L__
ERASE
HEAD
Weel
e|
as
ess
[8
Mc-2 ¢ & 3
MOTOR CONTROL
IC80l
C8I7 |IOM47
BIAS OSC SWITCH ING
Q8ol D804 D401
2SD592NC-R MA 27W MA ISO
* This diagram might be modified without notice for further development of technology.

MATIC DIAGRAM
TERMINAL GUIDE
Cc
B 8
[| 000 000 000 000 O|
E E
E
c
B
MPX
Q201 ic 301 Sf-1 st+2 ‘ST=3 sT-4 -
2SA733 PAPCII9TC ae we (3):
also sd
g
E
(BOTTOM
VIEW)
= Q201 QI0l,40I~ 405,
801,803, 804
60 O1 60 O|1 30 04 30 04
o2 50 02 20 O05 20 -~CD) (TD-
(6) 40 03 40 03 10 06 10 06
pt PL
T101,201 T202,203 T8OI L201 DIOI~ 104 D202,901
[9-1] [1.5 ] [2.0] 5 [0.7] [ 0 | [0.4] fing aaa
H
0.7
:
: q ' +
v
4 ©
N
a
D201,902~ 904
: q @
sso!
° °
S301
ooo ooo
SF5
SFI-4 SFiI-2
e000 000 000
000 000 000
9 FM STEREO EYE
fa)
D301
S
-
ae
Fa LN224RPH “
9
SFI-~
SF5
Q90!
D301,
302
AVC o a (BOTTOM VIEW)
(BOT
D202
i
POWER
INDICATOR
TOM
VIEW)
MA 1051 @ D302
0
©
LN224RPH
R209 100 5
be
.
#0
1
hes
8
:
S SPEAKERS IC 101
16
9
12-3
—
1 10 Icsol
| Ic7Ol
! i 5
|
I1c40l
i 8
IC
30!
(TOP
VIEW)
(FRONT
VIEW)
NOTES
HEADPHONES
a | indicate DC voltage values in V
ING
°
3,
804
SFICYSF5S
Function
selector
switch
in
"FM"
position
==
CT
SF
|
——
tape,
SF
2
——
phono,
SF3
—
FM,
S301—— mono/stereo , SF 5 — MW
®
R503
SFI-5
Power
switch
in
"
off"
position
mine
y
sg0l
Power
voltage
selector
in
"220V"
position
N in
ot
26
tte
[|
zs
AE
POWER
AMP
$802
Phono
speed
selector
switch
in
45
position
7
.
15K
1c
70l
$903
AC/DC
selector
switch
in
"AC"
position
ey
= =
LA4500
" 7
8
8
86
Dil
Tape
motor
switch
in
off
position
@ al
*
~
7
”
“
ST-I7™~ST-4 Rec play selector switch in play position
s80l Muting switch in ae position
s2 Phono motor switch in " off" position
<
x
fo}
o
Bs
9901
STABILIZER
£
Q90!1
2
Tolerance
:
@,
eer
lepe
RECT
M=+t20%,
2738
%,
K=t10%,
J#t5%
RY
D902,
903
oo
DSI35
TD
i
3.
DC
voltages
are
to
be
measured
with
DC
R819
22k
(3)
TrAPE)
MA
1100
S
els
|-
°
VTVM
under
no
signal
condition
in
FM,
— a
Reel
7e20
77
?
a
STR
Ke
|
AM.
position
oO
oot
R601
3.9K
OR
|
BE5Le
|
AC
IN
se
oF
|
apPaTe
S a
<§ | <
R602 3,9K a I
c905 eS
16v100 G4 a |, | ema ee
Jee OOK LO) a (On —
IMPORTANT SAFETY NOTICE
&
I
Mc-3
PROTECTOR
|B]
DAMPER
@!
o
D904
Components
identified
by
/\
mark
have
O
AM DSI35TD
DI02,103 an special characteristics important for safety .
AMI5O sk
(ole
ews
When
replacing
any
of
these
components,
use only manufacturer's specifled parts.
na
SG
=
J500
—{
KEX)
(WEX)