Manuale Technics Sl1200 Prima Parte

1. Service Manual
ORDER NO. SD7908-1601
Turntable System
SL-1200MK2
(M), (MC)
A WARNING
This service literature is designed for experienced repair techmcans
only and is not designed for use by the general public. It does no
contain warnings or c o l o n s to advise non-technical indiv.duals of
potential dangers In attempting to service a product. Products powered
by electricity should be serviced or repaired only by exper.enced
professional technicians. Any attempt to service or repair the product
or^products dealt with in this service literature by anyone else could
rest.:" in serious injury or death.
• The model SL-120OMK2 (M) is available in U.S.A. only.
. • The model SL-1200MK2 IMC) is available in Canada only.
SPECI FI CATIONS Specifications subject to change w i t h o u t notice. Weight and dimensions shown are approximate.
Genera) Rumble: - 5 6 dB (IEC 9 8 A Unweighted)
Power supply: 120 V , A C , 50 or 60 Hz - 7 8 dB [IEC 9 8 A Weighted)
Power consumption: 12 W
Dimensions: 45,3 x 16.2 x 36 cm Tonearm section
IW x H x D l (17-27/32"x6-19/64"x14-11/64") Type: Universal
Weight: 11 kg (24.3 lb) Effective length: 230mm (9-1/16")
Arm height adjustment 31.8—37.8 mm (helicoid part 6 mm)
Turntable section range: (l-2l/32"-3-35/64")
Type: Quartz direct drive (helicoid part 15/64")
Manual turntable Overhang: 15 mm (19/32")
Drive method: Direct drive Effective mass: 12 g (without cartridge)
Motor: Brushless DC motor Offset angle: 22°
Turntable platter: A l u m i n u m diecast Friction: Less than 7 mg (lateral, vertical)
Diameter 33.2 cm (13-5/64") Tracking error angle: Within 2°32' (at the outer groove of
Weight 2 kg (4.4 lb.) 30 cm 112") record
Turntable speeds: 33-1/3 rpm and 45 rpm Within 0°32' [at the inner groove of
Pitch control: All quartz-locked ± 8 % range 30 cm (12") record
Starting torque: 1,5 kg-cm (1.3 Ib-in) Stylus pressure
Build-up adjustment range: 0-2.5 g
characteristics: 0.7 s. f r o m standstill to 33-1/3 rpm Applicable cartridge 6-10 g
Braking system: Electronic brake weight range: 1 3 . 5 - 1 7 . 5 g (including headshell)
Speed change due to {with auxiliary 9.5-13g
load torque: 0% within 1.0 kg-cm (0.87 Ib-in) weight): 1 7 — 2 0 . 5 g [including headshell)
Wow and flutter: 0 . 0 1 % WRMS* 3.5-6.5 g
0.025% WRMS {JIS C5521) (with shell weight): 1 1 - 1 4 g (including headshell)
±0.035% peak (IEC 9 8 A Weighted) 7.5 g
* This rating refers to turntable assembly alone, excluding Head shell weight:
effects of record, cartridge or tonarm, but including
© Matsushita Electric Industrial Co. Ltd..
platter. Measured by obtaining signal f r o m built-in fre- All rights resanred. unauthorized
quency generator of motor assembly. copying and distribution Is • violation erf law
Panasonic Company Panasonic Hawaii, Inc. Matsushita Electric of Canada Ltd.
Division of Matsushita Electric 320 Waiakamilo Road, Honolulu, 5770 Ambler Drive,
Corporation of America Hawaii 96817 Mississauga, Ontario
One Panasonic Way, Secaucus, L4W 2T3
New Jersey 07094

2. SL-1200MK2
• CONTENTS
DISASSEMBLY PROCEDURE 2, 3 PRINTED CIRCUIT BOARD 11,12
PARTS I D E N T I F I C A T I O N S 3 A D J U S T M E N T (Electrical) 13
A R M BASE ASSEMBLING PROCEDURE 4 REFERENCE V O L T A G E A N D W A V E F O R M AT EACH )C
FEATURES 5 PIN 13, 14
ADJUSTMENTS 6 BLOCK D I A G R A M 15, 16
SCHEMATIC D I A G R A M 7.8 EXPLODED VIEWS 17, 18
REPLACEMENT PARTS LIST (Electrical) 9 R E P L A C E M E N T PARTS LIST (Mechanical) 19
TROUBLESHOOTING 10 EXPLODED VIEWS 20
• DISASSEMBLY PROCEDURE
How to remove panel cover
1. Remove head shell and turntabte,
2. Secure arm w i t h arm clamp.
3. Remove 5 screws © of the panel cover as shown in
Fig. 1.
How to remove stater frame coil and F.G detector
coil
4. Remove 3 connectors © and 2 read wires © f r o m
power transformer as shown in Fig. 2.
5. Remove 3 screws © of the drive circuit board and 3
screws @ of the stater frame cover as shown in Fig. 2.
6. Disconnect 18 soldered parts © of the stater coil and
4 soldered parts © of the F.G detector coil as show in
Fig. 3.
7. Remove 3 screws © of the stater frame ass'y as shown
in Fig. 3. Fig. 1
How to remove bottom base ass'y
8. Remove 4 audio insulators. (Counterclockwise rotation)
9. Remove 1 7 screws and spacer © as show in Fig. 4.
10. Remove 11 screws © as shown in Fig. 4.
How to remove stylus-illuminator lamp
1 1 . Remove 2 screws © of the stylus-illuminator lamp
ass'y as shown in Fig, 5.
12. Remove 1 screw ® as shown in Fig. 6.
How to remove neon-illuminator L.E.D.
13. Remove 4 screws © as shown in Fig. 5.
14. Remove 1 circlip © and switch cam © as shown in
Fig. 5.
15. Remove strobo-illuminator case.
How to remove tone arm
16. Remove 4 screws © of the arm base cover as shown in
Fig. 5.
17. Remove 2 screws © of the phono cord clamper as
shown in Fig. 5.
18. Remove phono cord clamper as shown in Fig. 7.
19. Remove 2 screws © of the phono cord p.c.b. as shown
in Fig. 8,
20. Remove 2 screws © as shown in Fig. 8.
2 1 . Remove 2 screws 0 of the silicon oil dumper as shown
in Fig, 8.
22. Remove 3 screws © as shown in Fig. 8.
23. Remove 2 screws © of the tone arm as shown in
Fig. 9.
m

3. PARTS IDENTIFICATION Arm-height adjustment ring
Hinge
Fig. 10 L31
i

4. • ARM BASE ASSEMBLING PROCEDURE
1. Attach the control ring to the arm base seat, (The 5. Rotate the control ring and make sure that the arm base
control ring should be roated counterclockwise.) shifts w i t h i n the range of 0 ~ 6 m m . (See Figs. 14 and 15)
2. Completely tighten the control ring, and then loosen it If it does not shift w i t h i n the specified range, the arm
1.5~2.5 turns to set the scale to " 3 " . (See Fig. 11) base position is deflected. In that case, disassemble the
parts and check as specified in step 3.
Fig. 14
3. Hold the arm base and set the red line mark on the arm
base to the scale ne3r "2", then turn the arm base
clockwise. (See Fig. 12)
Note:
Take care not to allow deflection of the predetermined
positions of the control ring and arm base seat.
• ADJUSTMENT OF CANCELLER
SPRING POSITION
if the arm body or PU base plate is replaced, be sure to set
the canceller knob to " 0 . 5 " and make sure that the can-
Fig. 12 celler spring is in contact with the arm shaft. (See Fig. 16)
If the canceller spring is deflected, adjust it as follows:
4. Adjust the arm base so that the red line mark on the arm 1. Clamp the arm on the rest.
base is set to the scale "3" of the control ring. Next, 2, Set the canceller knob to " 0 . 5 " .
secure the positioning base plate w i t h t w o setscrews. 3, Remove the PU base plate, adjust gear © so that the
(See Fig. 13) canceller spring is in the position of Fig, 16.
4. Mount the PU base plate onto the arm base and cru'ck
the spring position.
Canceller spring
Fig. 13
Fifl. 16

5. SL-1200MK2
• FEATURES
Total quartz locked continuous pitch adjustment Y o u can then clearly see the spaces between the selections
±8% on the record, and cue the arm exactly where you want it.
Quartz-phase-locked control means almost perfect accuracy The illuminator can then be pushed back down into the
of turntable rotation. base.
But w i t h most quartz turntables, this accurate control
circuit must be cut out when the pitch control is employed. High sensitivity, low mass, gimbal suspension
With the S L - 1 2 0 0 M K 2 , however, pitch is variable con- tonearm
tinuously (analogically) by up to ±8% under total quartz- The highly sensitive tonearm features a genuine gimbal
locked control. The pitch is controlled w i t h a large sliding suspension, the rotational center of which is precisely
lever, located to the right of the turntable platter. defined at one point. Bearings are finished to a tolerance of
Four lines of platter markings are also provided indicating ±0.5 microns. This and the extra-closeness of pivot center
+6%, +3.3%, 0% (exact rated speed) and - 3 . 3 % change to the bearings, result in the minimal friction of 7 mg
f r o m rated speed. (0.007 g) for both horizontal and vertical movement. Add
to this the low 12-gram effective tonearm mass (including
Aluminum diecast cabinet and special heavy rubber
headshell, w i t h o u t cartridge) and you have a tonearm com-
base material provide acoustic isolation patible with the wide range of compliances found in today's
The effects of external vibrations are dramatically reduced
cartridges. If you choose a popular high compliance MM
in the turntable by this new turntable construction.
cartridge, the low range resonance frequency will appear in
The turntable base is precision-made aluminum diecast.
the correct area to avoid warp frequencies of records, but
A n d the underside of the main base is made of a heavy
w i t h o u t entering the low end of the audio spectrum. This
rubber material (special one-piece molding) which has
tonearm is provided with a computer designed, light-weight,
excellent vibration resistance and absorbing characteristics.
high-rigidity headshell made of single-piece diecast aluminum
The turntable platter is also vibration-damped with special-
to resist partial vibration. The universal design allows head-
ly fabricat rubber matting in the underside along with the
shell interchangeability. Contacts are gold-plated.
thick turntable sheet (rubber mat). Four targe-size insulating
feet also help to absorb unwanted vibrations. Helicoid tonearm height adjustment
These features make SL-1 200MK2 ideal for use with extra- A r m height is adjustable within a range of 6 mm to accom-
high sound pressure levels. modate varying cartridge dimensions. Adjustments are done
w i t h a precision-made helicoid.
High torque for fast starts
The integral rotor/platter motor delivers 1,5kgcm (1.3lbin) Other fine features
starting torque. This high torque gives very quick starts • Quick stops are achieved w i t h a fully electronic braking
enabling the platter to reach 33-1/3 rpm w i t h i n 0.7 s. (a system.
quarter of a t u r n ) . This is a big advantage in many profes- • A strobe illuminator is provided. The stroboscope is con-
sional applications where fast cueing is a necessity. trolled by the extremely stable quartz oscillator, rather
than potentially unstable AC line frequency.
Stylus illuminator for low-light conditions
• Power on/off control built-into strobe illuminator for
Y o u ' l l appreciate the stylus illuminator when you are using
ease-of-operation.
the turntable under low-light conditions. The illuminator
• Soft-touch start-stop switch allowing precision control
can be hidden in the turntable base, should you need it,
capability without the annoyance of accidental operation.
simply push a button and it will pop up gently and cast a
• Technics integral rotor/platter motor construction with
beam of light across the disc in the area traversed by the
full cycle detection FG.
tonearm.
Cross section of SL-1200MK2
Heavy rubber
Fig. 17

6. )MK2 SL-1200MK2
ADJUSTMENTS
Pitch control {fine adjustment of speed) (See Figs. Adjustment of the tonearm height (See Fig. 22.)
18 and 19.) The height of the tonearm can be adjusted up to 6 m m , and
When the pitch control knob is located at the center of the a scale is provided on the adjust ring tn 0.5 mm increments.
position after turning on the power, the green LED indicator Be sure to set the proper arm height using the adjust ring
is lit showing the operating condition for the predetermined scale and referring to the table.
speed (either 33-1/3 or 45 rpm). The pitch control is variable
in a range of 0-~±8%. Height of cartridge (mm) Scale reading on the arm-height
(H) adjust ring
Adjustment should be done on the basis of indicator scale.
15 0
Figures on the indicator show approximate percentages for
16 1
variable pitch control
17 2
When the strobe dots in 4 stages marked at the peripheral
18 3
edge of the turntable appear to be stationary, variation of
19 4
individual pitches is shown. (See Fig. 19.J
20 5
Note: 21 6
The strobe-illumination of this unit employs a strobe-illu-
minator LED synchronized w i t h the precise quartz fre- For example, if the cartridge height is 17.5 m m , the arm-
quency. height adjust ring should be positioned at the intermediate
For fine adjustment of the turntable speed, be sure to location between 2 and 3 on the scale. (See Fig, 22.)
effect the adjustment according to the LED illumination. Caution:
The LED illumination is not synchronized with fluorescent Be sure to lock the tonearm by turning the arm lock knob
lamps. in the direction indicated by the arrow after finishing the
height adjustment for the tonearm.
Adjustment of arm-lift height {See Figs. 20 and 21.)
The arm-lift height (distance between the stylus tip and Lubrication (See Fig. 23.)
record surface when cueing lever is raised) has been A p p l y 2 or 3 drops of oil once after every 2000 hours'of
adjusted at the factory before shipping to approximately operation.
8-13mm. The time interval is much longer than that for conventional
If the clearance becomes too narrow or too wide, turn the type motors (200-500 hours).
adjustment screw clockwise or counterclockwise, while Please purchase original o i l . (Part number is SFWO 010.)
pushing the arm lift d o w n .
Clockwise rotation
—distance between the record and stylus tip is decreased.
Counterclockwise rotation
—distance between the record and stylus tip is increased.
Note:
As the adjusting screw has hexagonal head, be sure to make
the adjustment while depressing the arm lift, or the screw
will not move freely.
Also be sure that the hexagonal head retracts correctly into
the arm lift when the latter is released.
1
*]
. •
J 1
Fig. 18
1 • aj, f • • ".I.i11 • • •, al the pilch rjf
1 :
' • •
|2) appeafs sraliDnary al ! h * pilfih P D .3 3°*
1 - appears ilitiqnffy ai fhe pilch of
3j 0^
A) appear^ s1a11pnaiy al the pilch of 3 3*fc
Fig. 19
LI] m

7. SdlQIYIdtiC DldCjrdlTI (This schematic diagram may be modified at any time with the development o1
1 , 2 . 3 , 4 , 5 . 6 , 7
POWER SWITCH
seoi
Braking
adjustment-
Adjustment of
pitch control
± 0 % (Pitch)
Pitch Adjustment
(GAIN)
D201, 202
SVDSR105C Q
PITCH LOCK SWITCH SPEED SELECTOR SWITCH
PITCH CONTROL VOLUME STRC
TT™ :
I M P O R T A N T SAFETY NOTICE
T H E S H A D E D A R E A ON THIS SCHEMATIC D I A G R A M INCORPORATES SPECIAL FEATURES I M P O R T A N T FC
SAFETY.
WHEN S E R V I C I N G IT IS :ESSENTîAL T H A T O N L Y M A N U F A C T U R E R SPECIFIED PARTS BE USED FOR T H E CRITICS
COMPONENTS IN T H E S H A D E D A R E A S OF THE S C H E M A T I C .
m

8. ! development of new technology.)
7 , 8
K401 1.5K
.-A/Vy-i
P!l
WITCH D204 0205 STYLUS-ILLUMINATOR
STROBE ILLUMINATOR
NOTO:
1. S 2 0 1 : Speed selector switch (33-1/3 r.p.m,) in 6 S601 : Power switch in " O N " position.
" O N " position, (push conditionl 7, The drive circuit IC voltage and wave form are not
2. S202; Speed selector switch (45 r.p.m.) in " O F F " indicated In side the schematic diagram.
position, [not-push condition} 8. Indicated voitege values are the standard values for
3. S203: Start/Stop switch in " O F F " position, (not- the unit measured by DC electronic circuit tester
push condition) [high impedance) with thé chassis taken as
4. S 3 0 1 : Pitch lock switch in " O N " position, (center standard. Therefore, there may exist some errors in
position) the voltage values, depending on the internal im-
[8] 5. S 4 0 1 : Stylus-illuminator switch in " O F F " position. pedance of the DC circuit tester.

9. SL-1200MK2
REPLACEMENT PARTS LIST (Electrical)
Notas: 1. Part numbers are indicated on most mechanical parts.
Please use this part number for parts orders.
2. A indicates that only parts specified by manufacturer be used for safety.
3. SL-1200MK2(M) * [ M ] , SL-1200MK2 ( M C I * [MC]
Ref. No. Part No. Part Name & Description Ref. No. Part No. Part Name & Description
INTEGRATED CIRCUITS R108 ERD2SFJ103 Carbon, lOkil, 1/4W, ± 5%
R109, 110 A ERX1ANJ4R7 Metal Fiim, 4.7fl, 1W, ± 5%
IC101 AN6675 Integrated Circuit
R201 A ERG1ANJ561 Metal Oxide, 560fi, 1W, ± 5%
IC201 AN6680 Integrated Circuit
R202 ERD25FJ103 Carbon, lOkil, 1/4W, ± 5%
IC301 AN6682 Integrated Circuit
R203 ERD25FJ470 Carbon, 47ÎÎ. 1/4W, ± 5%
IC302 SVITC4011BP Integrated Circuit
R204 ERD2SFJ272 Carbon, 2.7kfi, 1/4W, ± 5%
R205 ERD2STJ124 Carbon, 120kfi, 1/4W, ± 5%
R206 ERD25TJ183 Carbon, 18kfi, 1/4W, ± 5%
TRANSISTORS Carbon, 56k fi. 1/4W,
R207 ERD25TJ563 ± 5%
Q1 2SD389A-Q Transistor R208 ERD2STJ224 Carbon, 220k fi. 1/4W, ± 5%
Q2. 3, 202 2SD637 Transistor
Q201 2SCI846 -R Transistor R209 ER025TJ154 Carbon, 150kfi, 1/4W, ± 5%
Q203 2SC1328-T Transistor R210 ERD25TJ183 Carbon, 18kfi, 1/4W, ± 5%
R211 ERD25FJ103 Carbon, lOkil, 1/4W, ± 5%
R212 ERD26FJ121 Carbon, 120fi, 1/4W, ± 5%
DIODES R213 ERD25FJ122 Carbon, 1.2kfi, 1/4W, ± 5%
D1 A SVDS1RBA40 Rectifier R214 ER025TJ223 Carbon, 22kfl, 1/4W, ± 5%
D2.301 MA10S1 Diode, Zener 5.1V R215 ERD25FJ472 Carbon, 4.7kfi. 1/4W, ± 5%
D204 MA162A Diode R216 ERD2STJ154 Carbon, 150kfi, 1/4W, ± 5%
D201, 202 SVDSR-105C Light Emitting Diode R217 ERD25TJ223 Carbon, 22kfi, 1/4W, ± 5%
D203~206 SVDEBR5505S Light Emitting Diode R218 ERD2SFJ102 Carbon, 1kfi, 1/4W, ± 5%
D401 SVDGL-9PG2 Light Emitting Diode
R219 ERD25FJ332 Carbon, 3.3kfi, 1/4W, ± 5%
R220 ERD25FJ221 Carbon, 220fi, 1/4W, ± 5%
CRYSTAL R221 ERD25FJ471 Carbon, 470fi, 1/4W, ± 5%
R301 ERO25CKF3301 Metal Film, 3.3kfi, 1/4W, ± 1%
X201 SVQU306115 Crystal, 4.19328MHz Oscillator Carbon, 1/4W,
R302 ERD25FJ471 470fi, ± 5%
R303 ERD25FJ822 Carbon, 8.2kfi, 1/4W, ± 5%
R304 ERD25FJ162 Carbon, 1.5kfi, 1/4W, ± 5%
VARIABLE RESISTORS ERD25TJ223 Carbon, 22kfi, 1/4W,
R306 ± 5%
VR201 EVLS6AA0OB54 Braking Adjustment (BRAKE), 50kfi (B) R601 ERD25FJ4R7 Carbon, 4.70, 1/4W, ± 5%
VR301 EVMH2GA00B53 Adjustment of Pitch Control ±0%(PITCH),
5 k f i |B)
VR302 EVLS6AA0OB54 Pitch.Adjustment (Gain) 50kfi CAPACITORS
VR303 EVBJ05C19ABE Pitch Control Volume
C1 ECEB1HS471 Electrolytic, 470jiF, 50V
C2 ECEA1VS330 Electrolytic, 33^iF, 35V
C3 ECEA1ES220 Electrolytic, 22/jF, 25V
SWITCHES C101, 102 ECEA1VS330 Electrolytic, 33/iF, 35V
S201 EVQP5R04K Switch, Speed Selector (33-1/3 r.p.m. C103 ECEA1VS330 Electrolytic, 33j/F, 35V
S202 EVQP5R04K Switch, Speed Selector (45 r.p.m.) C104, 105 ECQM1H104KZ Polyester, 0.1/iF, 50 V, ±10%
S203 SFDSSS5GL13C Switch, Start/Stop C106, 107 ECQM1H104KZ Polyester, 0.1/iF, 50 V, ±10%
S401 SFDSD2MSL-4 Switch, Stylus-illuminator C108 ECEA1ES101 Electrolytic, 100/jF, 25V
S601 A SFDSSS5G L-2 Switch, Power C109, 110 ECQM1H104KZ Polyester, 0.VF, 50 V, ±10%
cm ECQM1H562KZ Polyester, 0.0056j<F 50 V, ±10%
LAMP C112 ECEA1JS4R7 Electrolytic, 4.7/jF, 63V
PL1 SFDN12201 Lamp, Stylus-illuminator C201 ECEA1CS330 Electrolytic, 33^F, 16V
C202, 203 ECEA50Z1 Electrolytic, IfF. 50V
C204 ECQM1H473KZ Polyester, 0.047^F, 50V, ±10%
TRANSFORMER C205 ECEA1AS221 Electrolytic, 220//F, 10V
C206 ECEA50Z1 Electrolytic, VF. 50V
T1 A SLT60EU7B Power Transformer C207 ECCD1H1Û1K Ceramic, 100pF, 50 V, ±10%
C208 ECCD1H390K Ceramic, 39pF, 50 V, ±10%
C209 ECEA1ES101 Electrolytic, 100/iF, 16V
FUSE C210 ECQM1H224KZ Polyester, 0.22/¿F, 50 V, ±10%
Fl A XBA2F03NU10O Fuse, 350mA C211 ECQM1H473KZ Polyester, 0.047/iF, 50 V, ±10%
C212 ECEAS0Z3R3 Electrolytic, 3.3/iF, 50V
C213 ECCD1H471K Ceramic, 470pF, 50 V, ±10%
RESISTORS C214 ECEA1ES101 Electrolytic, lOOjiF, 25V
R1 ËRD25FJ562 Carbon, 5.6k fi, 1/4W, ± 5% C215 ECEAS0Z1 Electrolytic, VF. 50V
R2 ERD25FJ682 Carbon, 6.8kfi, 1/4W, ± 5%
R3 ERD2SFJ272 Carbon, 2.7kfi, 1/4W, ± 5% C216 ECEA1ES470 Electrolytic, 47^F, 25V
R4 ERD2SFJ561 Carbon, 560fl. 1/4W, 5% C301,302 A ECQK1123FZ Polyester, 0.01 2/jF, 125V, ± 1%
R5 ERD25FJ471 Carbon, 470Í1, 1/4W, ± 5% C303 ECEA50Z1 Electrolytic: VF, 50V
R101 ERD25FJ103 Carbon, 10kfi, 1/4W, ± 5% C304 ECEA1HS100 Electrolytic, 10/iF, 50V
R102 A ERX1ANJ4R7 Metal Film, 4.7U, 1W, ± 5% C305 ECQM1H122<Z Polyester; " 0.0012/iF 50V, ±10%
R103 ERD25FJ472 Carbon, 4.7kfi, 1/4W, ± 5% C306 ECEA50Z1 Electrolytic, VF, 50V
R104 ERD25TJ473 Carbon, 47kfi, 1/4W, ± 5% C601 [Ml A ECQF1A473MD Polyester, 0.047^F, 400V, ±20%
R105 ERD26FJ103 Carbon, 10kfi, 1/4W, ± 5% C601 [MCI A ECQU1A473ME Polyester, 0.047/iF, 400V, ±20%
R106 ERD25FJ150 Carbon, 15fi, 1/4W, ± 5%
R107 A ERX1ANJ1R5 Metal Film, 1.5fi, 1W, ± 5%
TERMINAL GUIDE OF TRANSISTOR AND IC
0
AN6675 AN6680 AN6682 SVITC4011BP 2SC1846 2SC1328 2SD637 2SD389
•
m m m
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10. • TROUBLE SHOOTING
Power switch doesn't Power circuity check NO F1,S601,T1
(A)
operate • TP5 - 20V D 1 , Q1 ~ Q 3
Reference voltage circuity check NO Q1 ~ Q 3
(B) It doesn't rotate
• TP5 - 20V D2
/ S t a r t / S t o p switch N YES
V "push" /
Control circuity check
NO IC201
• Check voltage and wave X201
I
form at IC201
YES
Drive circuity check NO
• Check voltage and wave IC101
I
form at IC101
YES
Check voltage on Q201 NO
Q201
• Base voltage - 10V
Reference voltage circuity check NO
(C)l Runaway operation 1 „ Q1 ~ Q 3
J * • TP5 - 20V D2
YES
Control circuity check NO
• Check voltage and wave IC201
form at IC201
YES
< t
Drive circuity check NO
• Check voltage and wave IC101
formatlC101
YES
FG circuity check NO Q203,
• Check voltage on Q203 FG coil
Turntable rotates Control circuity check NO X201
(D) abnormally • Check voltage and wave IC201
form at IC201
YES
Pitch control circuity check NO IC301
• • Check voltage and wave IC302
form at IC301, IC302
Speed changeover is Speed select circuity check NO IC201
(E)
defective • TP 13 - 3.4V S 2 0 1 , S 202
•TP14-0V D 2 0 1 , D202
Strobe not Check voltage at TP28 and TP29 NO Q202
(F) • TP28 - 18.4V
illuminating D203~D206
• TP29-9.6V
na