Panasonic SG-1800 User manual

CAD) ORDER NO. won 2
Stereo Music Center
FM/MW/SW1/SW2/FM
STEREO
2
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:
SG-1
800
WITH
CASSETTE
TAPE
DECK
A
a
felts
FM/MW/SW1/SW2/FM STEREO
WITH
CASSETTE
TAPE
DECK
AND
SG
at
800P
RECORD
PLAYER
|
FM/MW/SW1/SW2/FM STEREO
WITH CASSETTE TAPE DECK AND . SG -| 800C
RECORD CHANGER
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DISASSEMBLY INSTRUCTIONS
@ Remove Dust Cover @ Turn Retaining Clip © Remove Record Player
Board 8
@ Pull Knobs © Remove Escutcheon
: ree | Pi]
: 33 \— Button, POWER
@® and LOUDNESS
@® Remove Counter Belt
and Cassette Deck
SG-1800
™ Yo Replace Parts on P.C. Board ....... Refer toQ@-@.
m To Remove Escutcheon .....,....... Refer to@,@-@.
@ To Remove Cassette Deck ........... Refer 109 ,0-@.
SG-1800P/SG-1800C
= To Replace Parts onP.C. Board ... 2... Refer to@-6.
m To Remove Escutcheon ............. Refer to@ -6.0-9.
®
To
Remove
CassetteDeck
...........
Refer
00-9
,.0-@.
SG-1800/SG-1800P/SG-1800C {4]

DIAL CORD STRINGING GUIDE
Notes:
Diat Drum... ee Turn fully clockwise.
Dial Cord Length ....... 142mm
ALIGNMENT POINTS
FMOSC Telnmer = OFM ta (FT) FM ANT Col
FM OSC Coll L102 | FM ANT Trimmer
FM
Dic
1FT
MW
OSC
Calf
F204
EM
Oie
ET
8W2
ANT
Colt
SW2 ANT Timmer
AW IO IFT
F SWt ANT Colt
ue
MW 2nd fF T
MW st FT
MW ANT Trimmer
SW1 ANT Trermer
JAW OSC Trimmer
ire
Fresflun Earth
Separation
SW2 OSC Trimmer
SG-1800/SG-1800P/SG-1800C {5}

ALIGNMENT INSTRUCTIONS
® RADIO ALIGNMENT-1
Controt Positions:
Volume Control . . Maximum (AM-4F and RE, FM-RE}; Minimum (EM-1F)
Treble Control... Canter
Bass Control . Center
Balance Control . . Center
Function Selector . Radio
Power Switch... . ON
Speaker Switch... A
Loudness ...... OFF
Band Selector... . MW,SW1,SW2,FM AUTO, FM MONO
Output of signal generator should be no higher than necessary to obtain output reading.
Make certain that spaaker system is connected to the receiver when aligning. (or use 82 dummy toad resistors).
PP BONAASWN =
— =.
SIGNAL GENERATOR or
SWEEP GENERATOR _ INDICATOR
(VTVM or SCOPE)
RADIO DIAL
SETTING AbIvst
REMARKS
CONNECTION FREQUENCY’
Fashion loop of several
turns of wire and radiate
signal into foop of
receiver,
Connect to EXT antenna
and ground through SW
Oummy antenna.
4 To
20, .
To SG 4, Receiver
i 1259F
32011 400pF
(Sw2) | OUMMY ANTENNA
465 kHz
30% Mod.
with 400 Hz
AMF AND RF ALIGNMENT
Point of non-
Interference
550 kHz
30% Mod.
with 400 Hz }
550 kHz
(18.3 mm)
1500 kHz
30% Mod.
with 400 Hz.
2.3 MHz
30% Mod.
with 400 Hz.
7 MHz
30% Mod.
with 400 Hz
1500 kHz
(157.4 mm}
Output meter across
speaker jack (L) or
2.3 MHz TP2 and TP3 (earth)
(7.0 mm)
7 MHz
(168.8 mm)
7 MHz
(6.3 mm)
22 MHz
30% Mod.
f with 400 Hz. |
22 MHz
(168.1 mm)
7201 (MW 3st IFT)
1202 (MW 2nd IFT)
1203 (MW 3rd tFT)
Adjust for maximum
output.
L201 (MW ANT Coil)
£204 (MW OSC Coil)
Adjust for max imutn
output by sliding coll
L201 along ferrite core.
@ Refer to Note.
C¥202
(MW ANT Trimmer)
CT204
(MW OSC Trimmer)
£202 (SW1 ANT Coil)
L205 (SWf OSC Coil)
Ct201
(SW1 ANT Trimmer)
C1205
(SW1 OSC Trimmer)
Adjust for maximum
output,
Repeat steps (2}
and (3),
Adjust for maximum
output by sliding coj!
1.202 atong ferrite core.
* Refer to Note.
Adjust for maximum
output.
Repeat steps (4) and
(5).
£203 (SW2 ANT Coil}
1.206 (SW2 OSC Coil)
Adjust for maximum
output,
C¥203
(SW2 ANT Trimmer)
CT206
(SW2 OSC Trimmer)
Note: Cement antenna coil with wax after completing alignment.
SG-1800/SG-1800P/SG-1800C
Adjust for maximum
output.
Repeat steps (6) and
(7).

ALIGNMENT INSTRUCTIONS
= RADIO ALIGNMENT-2
SIGNAL GENERATOR or
SWEEP GENERATOR RADIO DIAL INDICATOR ADsusT REMARKS
SETTING
CONNECTION [Frequency
FMIF AND DETECTOR ALIGNMENT
STEP
(VTVM or SCOPE)
Adjust 7101 for
maximum amptitude
and symmetrica'
4101 (FM 1st (FT) curve. ;
7204 (FM Disc. 1FT)
® Refer to Note.
High side through 1pF 10.7 MHz | Point of non- COnsACE NEE MITE:
between
point
TP1
and
(400
kHz
|
interference
fon/|
'NPUt
oLaore
TPS
:
:
:
TP4 (earth). Swe.) about 98 Miz) between point Adjust for maximum
and TP4 learth). amplitude and proper
linearity between about
£100 kHz markers.
T205 (FM Disc. IFT)
Note: Sefore aligning step 1, turn the cores of 1205 fully counterclockwise.
FM-RF ALIGNMENT
Connect to EXT. FM aT
antenna terminal through{ 9 H tbr 90 Mie L102 (FM ANT Coll) | Adjust for maximum
Oummy antenna. soe Mon, (23.6 mm) L101 (FM OSC Col) | output.
Common to chassis. with 400 Hz
Output meter across
Yo SSG 37.5 7, persed ele vee
(ienp. a @art
751 Tat Receiver
106 MHz cT101 Adjust for maximum
30% Mod 106 MHz (FM ANT Trimmer} oulput.
; (147.5 mm) C1102 Repeat steps (1) and
(2).
DUMMY ANTENNA wane (FM OSC Trimmer)
—+-
Note: As three output readings will be present, adjustments must be made at center frequency.
= FM STEREO ALIGNMENT
FREE RUN ALIGNMENT
Control Positions:
. Volume Controt . .. . Audible level of speaker sound
. Frebie Control I
. Bass Controt
. Band Setector
. Balance Control .... Center
EQUIPMENT CONNECTION f ADJUST REMARKS
Connect frequency counter to TP6 and TP4 {earth) VA30t Adjust VA301 for 19 kHz +100 Hz on frequency
at no signal condition. counter reading.
SEPARATION ALIGNMENT
Control Positions: ,
1. Stereo Modulator: Connect Stereo Modulator to EXT Mod. terminat of signal generator.
2. Signal Generator: Modulation Rate of 19 kHz Pilot Signal 0%
Modulation Rate of Right and Left Signal
Output Level
3. Tuner (Balance Control) Adjust balance control so that output tevel from both channets becomes equal.
EQUIPMENT CONNECTION
SIGNAL GENERATOR VTVM OSCILLOSCOPE
Connect to EXT. FM an-
bilingual
ec
aa
Connect
across
Connect
verticat
-
Adjust
VA302
for
minimum
indication
of
VIVM
,
speaker
jack
or
amp.
input
of
VR302
from
the
left
side
output
when
the
right
side
of
TP2
and
TP3
scope
to
terminals
(Separation
stereo
modulator
is
modulated.
E
(earth)
of
VTVM
Controt)
Adjust
VR302
in
the
same
way
for
the
right
side,
,
.
Adjust
for
best
balance
between
“L
to
R"
and
“R
to
L”
separation,
ADJUST REMARKS
OUMMY ANTENNA
Note: When aligning separation, disconnect frequency counter.
mM
CR
ADNANIO
RM
Aannnt
Aan
anna

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ALIGNMENT INSTRUCTIONS
= CASSETTE TAPE DECK ALIGNMENT
Controt Positions:
1. Function Selector ... 2.2... TAPE/MIC
2. BalanceContro) . 2... 2... Center
3. Tape Deck Condition soe eydifs Ss Recording Condition
CT801
CcT802
Sree ALIGNMENT VTVM CONNECTION
TP? TPH
Bias Voltage
TPS TRI
R/P Head Speaker Speaker
Azimuth Terminal Terminal
PM L£ANAIMM AMMAN IAM 48a ARAM
ALIGNMENT POINTS
(CASSETTE TAPE DECK)
REMARKS
|
Set CT8O1 and CT802 to canter position. “
{Y ot?)
cect rS) crao1 pe) |
y or
cTe02 Ho) creoz bt")
Adjust CT801 and CT802 for both equal valua of
VTVM reading. )
Adjust VRB01 to get 3.3 mV reading
on VIVM.
—_———
Adjust screw for maximum indication of VTVM.
(Test Tape VTT-652).
REC/PLAYBACK Head
|

pynreoentad
MECHANICAL ADJUSTMENT OF
CASSETTE TAPE DECK
PRESSURE ROLLER ADJUSTMENT b) Switch set to: “OFF”, remove main belt and
make sure that take-up reel and take-up cluich
are rolating smoothly.
c) Change take-up clutch tension by lurning the
{riction spring under reel table, and/or
d) Replace take-up clutch.
i. Switch set to PLAY. (Do not insert cassette.)
2. Hook Spring gauge to arm of pressure roller.
Pressure Rolier Friction Speing
Capstan
Take-up Clutch Assembly
3. Pull pressure roller away from the capstan in the
direction of arrow 1 with spring gauge and slowly
permit the pressure roller to return toward Capstan
in the direction of arrow 2. MOTOR PULLEY ADJUSTMENT
4. Measure: tension at time when pressure roller When replacing the motor, adjust the clearance
makes contact with capstan (or when pressure between motor and motor pulley as in figure below.
roller starts rotating.)
5. The standard tension of pressure roller should be
250 ~ 380g.
6. Hf pressure is not within these limits;
Clean the rubber roller and capstan with a soft cloth
moistened with alcohol or replace pressure spring.
TAKE-UP TORQUE ADJUSTMENT
Test Tape: SRK-CT (Take-up Torque Meter)
. Insert test tape.
. Rewind the tape to its starting point.
. Switch set to PLAY.
Read “*" mark of indicator on take-up side.
PoOnM—
Iindicalor
CASSETTE
| TORQUE METER |
QZZSAK-CT
Torque Scale
5. Repeat PLAY-STOP several times and read the
average tension.
6. The standard take-up tension should be 30 ~ 70
g.cm. tt take-up tension is not within these limits;
a) Clean main belt, take-up reel and al! parts
which contact them with a cotton swab
moistened with alcohol, and/or
fal
CR
A24ANNIAM
ANRAANRIN
Mm
«2nnne

SERVICING THE RECORD CHANGER-1 (SP-915ECA)
(SG-1800C)
CARTRIDGE REPLACEMENT LUBRICATION
w> Remove c} Install
@ Remove Screw
@® Remove Turntable
Location of
Stopper Ring
®
Remove
Wires
@
Grease
(SZ0GM0380)
Cartridge
@ Grease
be SZOGM0380
é Coronex No. 1
SG-1800C

SERVICING THE RECORD CHANGER-2 (SP-915ECA)
(SG-1800C)
STYLUS DROP POINT ADJUSTMENT
Adjust Screw.
TONE ARM LIFTING HEIGHT
ADJUSTMENT
High
q Tone Arm Adjust Screw
Low
Tone Arm
Record

SERVICING
THE
RECORD
PLAYER
(SP-510B)
(SG-1800P)
CARTRIDGE REPLACEMENT LUBRICATION
The record player has been thoroughly lubricated at the
1
©:
Install
factory
and
under
normal
use
should
not
require
ad-
m : Remove ditional lubrication. When replacing some parts,
Push Down however, it may be necessary to lubricate the parts as
& specified. : .
Grease
STYLUS REPLACEMENT
Note: ;
Do not allow grease to touch motor pulley, belt and
turntable.
SG-1800P . [12]