Technics SL-1200MK2 Service manual
Technics SL-1200MK2 is a high-fidelity turntable system that combines professional features with ease of use. Its quartz-locked continuous pitch adjustment allows for precise speed control, while the aluminum diecast cabinet and special heavy rubber base material provide excellent acoustic isolation. The high-torque motor delivers fast starts, and the stylus illuminator aids in low-light conditions. With its gimbal suspension tonearm, the SL-1200MK2 offers precise tracking and clear sound reproduction, making it ideal for both professional and home use.
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Service Manual ORDER NO . SD7908-1601 Turntable System SL-12 OM K2 (M), (MC) A WARNING experienced repair technicians This service literature is designed for the general public . It does not for use by designed and is not only non-technical individuals of contain warnings or cau:'.ons to advise . Products powered a potential dangers in attempting to service product repaired only by experienced or be serviced should by electricity or repair the product professional technicians. C.iy attempt to service t;+ anyone else could or,,products dealt with in this service literature rest'' in.. serious injury or death . " The model SL-11 200MK2 (M) is available in U .S .A . only . *The model SL-1200MK2 (MC) is available in Canada only . SPECIFICATIONS General Power supply : Power consumption : Dimensions : (WxHxD) Weight : Turntable section Type : Drive method : Motor : Turntable platter: Turntable speeds : Pitch control : ;:carting torque : Build-up characteristics : Braking system : Speed change due to load torque : Wow and flutter : Specifications subject to change without notice . Weight and dimensions shown are approximate . 120 V,AC,50or60Hz 12W 45 .3x 16 .2 x36 cm (17-27/32"x6-19/64"x l 4-11/64") 11 kg (24 .3 lb) Quartz direct drive Manual turntable Direct drive Brushless DC motor Aluminum diecast Diameter 33 .2 cm (13-5/64") Weight 2 kg (4 .4 lb .) 33-1/3 rpm and 45 rpm All quartz-locked ±8% range 1 .5 kg-cm (1 .3 Ib-in) 0 .7 s . from standstill to 33-1/3 rpm Electronic brake 0% within 1 .0 kg-cm (0 .87 Ib-in) 0 .01% WRMS* 0 .025% WRMS (JIS C5521) ±0 .035% peak (IEC 98A Weighted) * This rating refers to turntable assembly alone, excluding effects of record, cartridge or tonarm, but including platter . Measured by obtaining signal from built-in frequency generator of motor assembly . Rumble : -56 dB (I EC 98A Unweighted) -78 dB (IEC 98A Weighted) Tonearm section Type : Effective length : Arm height adjustment range : Overhang : Effective mass : Offset angle : Friction : Tracking error angle : Stylus pressure adjustment range : Applicable cartridge weight range : (with auxiliary weight) : (with shell weight) : Headshell weight : Universal 230mm (9-1/16") 31 .8-37 .8 mm (helicoid part 6 mm) (1-21 /32"-3-35/64") (helicoid part 15/64") 15 mm (19/32") 12 g (without cartridge) 22° Less than 7 mg (lateral, vertical) Within 2 ° 32' (at the outer groove of 30 cm (12") record Within 0 ° 32' (at the inner groove of 30 cm (12") record 0-2 .5 g 6-10 g 13 .5-17 .5 g (including headshell) 9 .5-13 g 17-20 .5 g (including headshell) 3 .5-6 .5 g 11-14 g (including headshell) 7 .5 g Cud Matsushita Electric Industrial Co . Ltd. All rights reserved . Unauthenzed copying and distribution is a violation of law Panasonic Company Panasonic Hawaii, Inc . Division of Matsushita Electric 320 Waiakamilo Road, Honolulu, Corporation of America .Hawaii 96817 One Panasonic Way, Secaucus, New Jersey 07094 Matsushita Electric of Canada Ltd . 5770 Ambler Drive, Mississauga, Ontario LAW 2T3 SL-1200MK2 CONTENTS DISASSEMBLY PROCEDURE . . . . . . . . . PARTS IDENTIFICATIONS . . . . . . . . . . . ARM BASE ASSEMBLING PROCEDURE. FEATURES . . . . . . . . . . . . . . . . . . . . . . . . ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . SCHEMATIC DIAGRAM . . . . . . . . . REPLACEMENT PARTS LIST (Electrical) .. . TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. .. .. . .. .. .. .. . . . . . . . . . . 2,3 . 3 . 4 . 5 . 6 . 7,8 . 9 . 10 DISASSEMBLY PROCEDURE How to remove panel cover 1 . Remove head shell and turntable. 2 . Secure arm with arm clamp . 3 . Remove 5 screws O of the panel cover as shown in Fig. 1 . How to remove stater frame coil and F.G detector coil 4 . Remove 3 connectors O and 2 read wires @ from 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 O of the stater coil and 4 soldered parts O of the F.G detector coil as show in Fig. 3. 7 . Remove 3 screws Q of the stater frame ass'y as shown in Fig. 3. How to remove bottom base ass'y 8. Remove 4 audio insulators . (Counterclockwise rotation) 9. Remove 17 screws and spacer Q as show in Fig. 4. 10 . Remove 11 screws O as shown in Fig. 4. How to remove stylus-illuminator lamp 11 . Remove 2 screws Q of the stylus-illuminator lamp ass'y as shown in Fig . 5. 12 . Remove 1 screw O as shown in Fig. 6. How to remove neon-illuminator L .E .D . 13 . Remov e 4 screws Q as shown in Fig. 5. 14 . Remove 1 circlip Q and switch cam QQ as shown in Fig. 5. 15 . Remove strobo-illuminator case . How to remove tone arm 16 . Remove 4 screws Q 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 Q of the phono cord p.c .b . as shown in Fig . 8. 20 . Remove 2 screws © as shown in Fig . 8. 21 . Remove 2 screws Q of the silicon oil dumper as shown in Fig. 8 . 22 . Remove 3 screws Q as shown in Fig. 8 . 23 . Remove 2 screws 0 of the tone arm as shown in Fig. 9. PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . . . . . . ADJUSTMENT (Electrical) . . . . . . . . . . . . . . . . . . . . . . . REFERENCE VOLTAGE AND WAVEFORM AT EACH PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . REPLACEMENT PARTS LIST (Mechanical) . . . . . . . . . . EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . IC .. . .. . .. . .. . .. . 11,12 13 13,14 15,16 17,18 19 20 Lamp caset Fig . 9 Fig . m PARTS IDENTIFICATION Hinge Arm-height adjustment ring Balance weight Power switch Strobe-illuminator/ pilot lamp Speed select buttons Fig . 10 10 . ARM BASE ASSEMBLING PROCEDURE 1 . Attach the control ring to the arm base seat . (The control ring should be roated counterclockwise .) 2 . Completely tighten the control ring, and then loosen it 1 .5---2 .5 turns to set the scale to "3" . (See Fig . 11) 5 . Rotate the control ring and make sure that the arm base shifts within the range of 0-6mm . (See Figs . 14 and 15) If it does not shift within the specified range, the arm base position is deflected . In that case, disassemble the parts and check as specified in step 3 . 3 . Hold the arm base and set the red line mark on the arm base to the scale near "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 . ® ADJUST ENT OF CANCELLER SPRING POSITION Fig . 12 4 . Adjust the arm base so that the red line mark on the arm base is set to the scale "3" of the control ring . Next, secure the positioning base plate with two setscrews . (See Fig . 13) 4 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 canceller spring is in contact with the arm shaft . (See Fig . 16) if the canceller spring is deflected, adjust it as follows : 1 . Clamp the arm on the rest . 2 . Set the canceller knob to "0 .5" . 3 . Remove the PU base plate, adjust gear Q so that the canceller spring is in the position of Fig . 16 . 4 . Mount the PU base plate onto the arm base and cit~ck the spring position . SL-1200MK2 FEATURES Total quartz locked continuous pitch adjustment f8% Quartz-phase-locked control means almost perfect accuracy of turntable rotation . But with most quartz turntables, this accurate control circuit must be cut out when the pitch control is employed . With the SL-1200MK2, however, pitch is variable continuously (analogically) by up to ±8% under total quartzlocked control . The pitch is controlled with a large sliding lever, located to the right of the turntable platter . Four lines of platter markings are also provided indicating +6%, +3 .3%, 0% (exact rated speed) and -3 .3% change from rated speed . Aluminum diecast cabinet and special heavy rubber base material provide acoustic isolation The effects of external vibrations are dramatically reduced in the turntable by this new turntable construction . The turntable base is precision-made aluminum diecast. And the underside of the main base is made of a heavy rubber material (special one-piece molding) which has excellent vibration resistance and absorbing characteristics . The turntable platter is also vibration-damped with specially fabricat rubber matting in the underside along with the thick turntable sheet (rubber mat) . Four large-size insulating feet also help to absorb unwanted vibrations . These features make SL-11 200MK2 ideal for use with extrahigh sound pressure levels . High torque for fast starts The integral rotor/platter motor delivers 1 .5kg-cm (1 .3lb-in) starting torque . This high torque gives very quick starts enabling the platter to reach 33-1/3 rpm within 0 .7 s. (a quarter of a turn) . This is a big advantage in many professional applications where fast cueing is a necessity. Stylus illuminator for low-light conditions You'll appreciate the stylus illuminator when you are using the turntable under low-light conditions . The illuminator can be hidden in the turntable base, should you need it, simply push a button and it will pop up gently and cast a beam of light across the disc in the area traversed by the tonearm . You can then clearly see the spaces between the selections on the record, and cue the arm exactly where you want it . The illuminator can then be pushed back down into the base . High sensitivity, low mass, gimbal suspension tonearm The highly sensitive tonearm features a genuine gimbal suspension, the rotational center of which is precisely defined at one point. Bearings are finished to a tolerance of ±0 .5 microns. This and the extra-closeness of pivot center to the bearings, result in the minimal friction of 7 mg (0 .007 g) for both horizontal and vertical movement . Add to this the low 12-gram effective tonearm mass (including headshell, without cartridge) and you have a tonearm compatible with the wide range of compliances found in today's cartridges . If you choose a popular high compliance MM cartridge, the low range resonance frequency will appear in the correct area to avoid warp frequencies of records, but without entering the low end of the audio spectrum . This tonearm is provided with a computer designed, light-weight, high-rigidity headshell made of single-piece diecast aluminum to resist partial vibration. The universal design allows headshell interchangeability . Contacts are gold-plated . Helicoid tonearm height adjustment Arm height is adjustable within a range of 6 mm to accommodate varying cartridge dimensions . Adjustments are done with a precision-made helicoid . Other fine features " Quick stops are achieved with a fully electronic braking system . " A strobe illuminator is provided . The stroboscope is controlled by the extremely stable quartz oscillator, rather than potentially unstable AC line frequency. Power on/off control built-into strobe illuminator for ease-of-operation . Soft-touch start-stop switch allowing precision control capability without the annoyance of accidental operation. " Technics integral rotor/platter motor construction with full cycle detection FG . )MK2 lections want it . nto the ~ension gimbal recisely - ance of t center f7 mg nt . Add icluding m comtoday's ice MM )pear in As, but m . This weight, iminum vs head- accomre done braking is con, rather itor for control eration . )n with : ig . 17 SL-1200MK2 ADJUSTMENTS Pitch control (fine adjustment of speed) (See Figs . 18 and 19 .) When the pitch control knob is located at the center of the position after turning on the power, the green LED indicator is lit showing the operating condition for the predetermined speed (either 33-1/3 or 45 rpm) . The pitch control is variable in a range of 0-±8% . Adjustment should be done on the basis of indicator scale . Figures on the indicator show approximate percentages for variable pitch control . When the strobe dots in 4 stages marked at the peripheral edge of the turntable appear to be stationary, variation of individual pitches is shown . (See Fig . 19 .) Note : The strobe-illumination of this unit employs a strobe-illuminator LED synchronized with the precise quartz frequency . For fine adjustment of the turntable speed, be sure to effect the adjustment according to the LED illumination . The LED illumination is not synchronized with fluorescent lamps . Adjustment of arm-lift height (See Figs . 20 and 21 .) The arm-lift height (distance between the stylus tip and record surface when cueing lever is raised) has been adjusted at the factory before shipping to approximately 8-13mm . If the clearance becomes too narrow or too wide, turn the adjustment screw clockwise or counterclockwise, while pushing the arm lift down . 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 . (t) appears stahonary at the pitch (2) appears slat, stahonary at the pitch onary at the pitch f3f appears (4) appears stahonary at the pitch of ,611, of " 3.3% o ;11 o3 3% Fig . 19 Adjustment of the tonearm height (See Fig . 22 .) The height of the tonearm can be adjusted up to 6 mm, and a scale is provided on the adjust ring in 0 .5 mm increments . Be sure to set the proper arm height using the adjust ring scale and referring to the table . Height of cartridge (mm) (H) 15 16 17 18 19 20 21 Scale reading on the arm-height adjust ring 0 1 2 3 4 5 For example, if the cartridge height is 17 .5 mm, the armheight adjust ring should be positioned at the intermediate location between 2 and 3 on the scale . (See Fig . 22 .) Caution : Be sure to lock the tonearm by turning the arm lock knob in the direction indicated by the arrow after finishing the height adjustment for the tonearm . Lubrication (See Fig . 23 .) Apply 2 or 3 drops of oil once after every 2000 hours'of operation . The time interval is much longer than that for conventional type motors (200-500 hours) . Please purchase original oil . (Part number is SFWO 010 .) Schematic Diagram 2 (This schematic diagram maybe modified at anytime with the development of 3 6 5 4 7 D1 SVDSl RBA20 A C Q POWER SWITCH ~pnai {YtiO--~ iF R601 r1 4.7 350 MA B 120.6 ORG T .I J Q3 AC 117V (50/60Hz) C R5 4 BLU °} TP4 ' D2 SVORD5.1E C R204 D Braking 2. TP21 adjustment R205 VR201 50KB TP22 R215 4 .7K R214 22K IC201 A N 6680 E F Adjustment of pitch control ±0%(Pitch) TF Q202 Pitch Adjustment (GAIN) D204 G MA150 VR303 PITCH LOCK SWITCH PITCH CONTROL VOLUME H 5203 S/S D201, 202 5201 33 1 5202 SVDSR105C 45 SPEED SELECTOR SWITCH STR( IMPORTANT SAFETY NOTICE THE SHADED AREA ON THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR SAFETY . WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURER SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC. u ,development of new technology .) 7 9 8 ~ 10 fP3 220 P19 OVI .213 Ilop i WITCH D206 5401 D204 D205 PLl STYLUS-ILLUMINATOR STROBE ILLUMINATOR NOTO : 1 . S201 : Speed selector switch (33-1/3 r.p .m .) in "ON" position . (push condition) 2 . S202 : Speed selector switch (45 r .p .m .) in "OFF" position . (not-push condition) 3 . S203 : Start/Stop switch in "OFF" position . (notpush condition) 4 . S301 : Pitch lock switch in "ON" position . (center position) 5 . S401 : Stylus-illuminator switch in "OFF" position . 6 . S601 : Power switch in "ON" position . 7 . The drive circuit IC voltage and wave form are not indicated in side the schematic diagram . 8 . Indicated voltage values are the standard values for the unit measured by DC electronic circuit tester (high impedance) with the chassis taken as standard . Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester . REPLACEMENT PARTS LIST (Electrical) Notes : 1. 2. 3. Part numbers are indicated on most mechanical parts. Please use this part number for parts orders. © indicates that only parts specified by manufacturer be used for safety . SL-1200MK2(M) + [MI , SL-1200MK2 (MC)+ (MC1 Ref . No . Part No . Ref, No. Part Name & Description INTEGRATED CIRCUITS IC101 IC201 IC301 IC302 Integrated Integrated Integrated Integrated 2SD389A-Q 2SD637 2SC1846-R 2SC1328-T Transistor Transistor Transistor Transistor SVDSIRBA40 MA7051 MA162A SVDSR-105C SVDEBR5505S SVDGL-9PG2 Rectifier Diode,Zener5 .iV Diode Light Emitting Diode Light Emitting Diode Light Emitting Diode SVQU306115 Crystal, 4 .19328MHz Oscillator Circuit Circuit Circuit Circuit DIODES A D1 D2,301 D204 D201, 202 D203-206 D401 CRYSTAL X201 VARIABLE RESISTORS VR201 VR301 EVLS6AA00a54 EVMH2GAOOB53 VR302 VR303 EVLS6AAOOB54 EVBJ05Cl9ABE Braking Adjustment (BRAKE), 50k(1 (B) Adjustment of Pitch Control f0°%(PITCH), 5kn (B) Pitch,Adjustlnent (Gain) 50kfl Pitch Control Volume EVQP5RO4K EVQP5RO4K SFDSSS5GLl3C SFDSD2MSL-4 SFDSSS5GL-2 Switch, Switch, Switch, Switch, Switch, SFDN122-01 Lamp, Stylus-illuminator SWITCHES S201 5202 S203 5401 S601 © Speed Selector (33-1/3r .p.m .) Speed Selector (45r .p .m .) Start/Stop Stylus-illuminator Power LAMP PL1 TRANSFORMER Tl © ~SLT60EL)713 Power Transformer © XBA2FO3NU100 Fuse, 350mA ERD25FJ562 ERD25FJ682 ERD25FJ272 ERD25FJ561 ERD25FJ471 ERD25FJ103 ERXIANJ4R7 ERD25FJ472 ERD25TJ473 ER026FJ403 ERD25FJISO ERXIANJlR5 Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Metal Film, Carbon, Carbon, Carbon, Carbon, Metal Film, FUSE F1 RESISTORS R1 R2 R3 R4 R5 R101 R102 R103 R104 R105 R106 R107 © © 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1W, 1/4W, 1/4W, 1/4W, 1/4W, 1W, 6 .6k fl, 6 .8kfl, 2 .7kfl, 560fl, 470fl, 10kfl, 4 .7fl, 4 .7kfl, 47kQ, 10kfl, 1511, 1 .511, t t t t t t t t t t t t 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% Part Name & Description ERD25FJ103 ERXIANJ4R7 ERGlANJ561 EAD25FJ103 ERD25FJ470 ERD25FJ272 ERD25TJ124 ERD25TJ"183 ERD25TJ563 ERD25TJ224 Carbon, Metal Film, Metal Oxide, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, 10kn, 4 .7fl, 560fl, 1Okfl, 47fl, 2 .7kfl, 120kfl, 18kf1, 56kfl, 220k fl, 1/4W, 1W, 1W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, t t t t t t t t t t 5% 5% 5% 5% 5% 5% 5% 5°% 5% 5% R209 R210 R211 R212 R213 8214 R215 R216 8217 R218 ER025TJ154 ERD25TJ183 ERD25FJ103 ERD25FJ121 ERD25FJ122 ERD25TJ223 ERD25FJ472 ERD25TJ154 ERD25TJ223 ERD25FJ102 Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, 150kfl, 18kf2, 1OkQ, 120fl, 1 .2kfl, 22kfl, 4 .7kfl, 150kfl, 22kf1, lkfl, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, t t t t t t t t t t 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% R219 R220 R221 8301 R302 R303 R304 R306 R601 ERD25FJ332 ERD25FJ221 ERD25FJ471 ER025CKF3301 ERD25FJ471 ERD25FJ822 ERD25FJ152 ERD25TJ223 ERD25FJ4R7 Carbon, Carbon, Carbon, Metal Film, Carbon, Carbon, Carbon, Carbon, Carbon, 3 .3kf2, 22012, 47012, 3.3kfl, 470(2, 8.2kf2, 1 .5kfl, 22kfl, 4 .7(2, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, t t t t t t t t t 5% 5% 5% 1% 5% 5% 5°% 5% 5% Cl C2 C3 C101, 102 C103 C104,105 C106,107 C108 C109, 110 C111 ECEBlHS471 ECEAIVS330 ECEAIES220 ECEAlVS330 ECEAlVS330 ECQMlH104KZ ECQMlHl04KZ ECEAlES101 ECQMIH104KZ ECQMlH562KZ Electrolytic, Electrolytic, Electrolytic, Electrolytic, Electrolytic, Polyester, Polyester, Electrolytic, Polyester, Polyester, 470yF, 33juF, 22/AF, 33juF, 33pF, 0 .1PF, 0 .1,uF, 100UF, 0,1yF, 0 .0056pF, 50V 35V 25V 35V 35V 50V, 50V, 25V 50V, 50V, 0112 C201 C202,203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 ECEAIJS4R7 ECEAICS330 ECEA50ZI ECQMlH473KZ ECEA1AS221 ECEA50ZI ECCDIHt01K ECCDlH390K ECEAIES101 ECQMlH224KZ ECQMlH473KZ ECEA50Z3R3 ECCDlH47lK ECEAIES101 ECEA50Z1 Electrolytic, Electrolytic, Electrolytic, Polyester, Electrolytic, Electrolytic, Ceramic, Ceramic, Electrolytic, Polyester, Polyester, Electrolytic, Ceramic, Electrolytic, Electrolytic, 4,7pF, 33pF, luF, 0 .047liF, 220pF, luF, 100pF, 39pF, 100pF, 0.22pF, 0.047pF, 3.3pF, 470pF, 100pF, 1uF, 63V 16V 50V 50V, 1ov 50V 50V, 50V, 16V 50V, 50V, 50V 50V, 25V 50V ECEAIES470 ECQK1123FZ ECEA50ZI ECEA1HS100 ECQMlHl22KZ ECEA50Z1 ECQFlA473MD ECQUIA473ME Electrolytic, Polyester, -Electrolytic ;`' ElectrOiytic, Polyest& ; " Electrolytic, Polyester, Polyester, 47uF, 25V 0.012pF, 125V, I#F, 50V 10pF, 50V 0.0012pF, 50V, 1pF, 50V 0.047pF, 400V, 0.047pF, 400V, 8108 8109, 110 R201 R202 8203 R204 8205 R206 8207 R208 AN6675 AN6680 AN6682 SVITC4011BP TRANSISTORS Q1 Q2, 3, 202 Q201 Q203 Part No . A © CAPACITORS C216 C301,302 C303 C304 C305 C306 C601 [MI C601 [MCI © © A 0 TERMINAL GUIDE OF TRANSISTOR AND IC AN6675 AN6682 SVITC4011BP J22 r 13 AN6680 1 12 13 12 ~~ 1 2SC1846 2SC1328 2SD389 2SD637 F 123456189 1: BC t10% t10% t10% t10% t10% t10% t10% 110% t10% t10% t 1% ±10% t20% t20% TROUBLE SHOOTING Power switch doesn't operate (B) I It doesn't rotate Start/Stop switch "push" Power circuity check NO Reference voltage circuity check " TP5-20V NO " TP5 - 20V F1, S601, T1 D1, 61.1 -Q3 YES Control circuity check " Check voltage and wave form at IC201 NO IC201 X201 Drive circuity check " Check voltage and wave form at IC101 YES Runaway operation heck voltage on Q201 " Base voltage - 10V NO Reference voltage circuity check " TP5- 20V NO Q201 Q1 -Q3 D2 YES Control circuity check " Check voltage and wave form at IC201 NO Drive circuity check " Check voltage and wave form at IC101 NO IC201 YES Turntable rotates abnormally Speed changeover is defective (F) Strobe not illuminating FG circuity check " Check voltage on Q203 NO Q203, FG coil Control circuity check " Check voltage and wave form at I C201 NO X201 I C201 Pitch control circuity check Check voltage and wave form at IC301, IC302 NO IC301 IC302 Speed select circuity check " TP13 -3 .4V " TP14-0V NO IC201 S 201, S 202 13201, 13202 NO Q202 13203-. .13206 Check voltage at TP28 and TP29 " TP28 - 18AV " TP29 - 9.6V + B lines Earth (Ground) lines Printed Circuit Board 2 A D202 SPEED SELECTOR SWITCH rr 02 B S20f 133 C START/STOP SWITCH D E D204 D203 POWER TRANSFORMER F G AC 117V (50/60 Hz) H ORG BLU BLU BRN RED 5401 STYLUS-ILLUMINATOR SWITCH RED BLK ORG IC301 BLK NL1 ORG R401 1 .5K IC302 SVITC4011 BP r YEL AN6682 BRN Q1 T 2S D389 zv Q203 2SC1328 - 470 E 1+ 73 . . -8 .2K r~ .Mr305 0 .0012 IF. 16VID0 R21J t~ P2~4~~ .'2 ~91 TP27 fi, k 7P74 BRN R221 470 "---Mh-.-" R 219 :: RED ORG YEL R216 C202 50'11 150F 0203 OOVI aft- c2c5 __" PSi4T'~ L 10 TP C21 FT 'T04 0 .0 "' F . Q201 (6 R204-I2_7K R211 10K TP23 . iH. A s k 206 5f 3.3 1 gar C109 G -if-R10 .1 1 X201 x-11 p (201 Rt R101 C101 25V33 C20 DV33 10" O 405 ll!t 0163 2v +3 6 8212 '20 C106 01 nC ~ RI :In }1. rc, -At~ BRN RED ORG YEL BLK BLU PPL BLU S601 POWER SWITCH 1601 AN6680 Q262 2SD637 5-of R5 470 NOMINEE 0201 2SC 1846 IC101 A N 6675 _ BLU B LU Q2, 3 2S D637 SL-1200MK2 SL-12 ADJUSTMENT (Electrical) Adjustments (Electrical) Notes: 9 Make the following adjustments Condition of the set . 1 . Power switch . . . . . . . . . . . . 2. Pitch control . . . . . . . . . . . . 3. Speed selector switch . . . . . . Instruments to be used 1 . Tester 2. Frequency counter Adjustment (D after replacing parts such as IC's, transistors, diodes, etc. . ON . Center position . 33-1/3 r.p .m . Connection Points Adjustment Point Adjustment of pitch control t0% (PITCH) Frequency counter (2) -. TP27 0 - GROUND VR301 1 . Pitch control switch to center position . 2. Adjust VR301 for 262.08 kHz 10 .05 kHz of frequency. B Adjustment of pitch control gain Tester TP31 and TP32 VR302 Adjust VR302 for 2.7 k92 t0.1 of resistance value C Braking adjustment (BRAKE) VR201 Adjust VR201 for complete stop within 120 ° - 270° after stop signal initiated . (Turntable becomes free a few seconds after stop) A - Adjustment Method O OO STOP SIGNAL 2700 Turntable &1 0 REFERENCE VOLTAGE AND WAVEFORM AT EACH IC PIN IC101 (AN6675) Stop Start 2V © ~3 O Os © OO 08 2V 0v Stop © = © 15V Start 15V ® ov sv sV 5V ('S sV q sv 0 6 .6V S oV ov 5V 5V -00 15v ' r © Start 2V (04""W 2V,~, , .. *40"1 15V ,.,_ 15V © 15V 15V 209. , © ov 15V T 20V 15V T ~ (S , f © ® ov 15V Same as at right © 20V Stop 1"" ,uV 20V ao .6 20V 10 .1 20V 20V 0 .2v 0.2V , t o .l, 1 .7V 1 .7V Q2 C IC201 (AN6680) Ot T T Start Stop 2 .5V 2 .5V Start 41. Same as at right ® OV 1) 9 .8V w © T5 © Ov v.xw x.sv ®3 7 ~oxw Same as at right 3 .4V OV OV , - T OO 5V 2 .5VZ,OV 5V 5V Ov OV,?,7. ,V` 7 .5V Ov I t OV ® 1 .5V Sv OV 3V 3V Ov ® 0 .2V ® 20- i i ~~ IV 2 .8V ® 4 .4 ,qY 3V r 2 .8V ® -[A-,-!V 3 .4V T7 o 9v - 6v Same as at right ,3J Same as at right A LM Q I iov stop -: Start Ov 9 .8V tov fl fl u u Same as at right Stop . 2.5V © 8v S .SV sv IC301 (AN6682) Tt T Start Stop Same as at right J U LJ L Same as at right Start sv ® T 'v TO © Same as at right Stop lhf t ,., ® OV Ov 3 .9V 3 .9V,(A Stop Same as at right TB -v T' - 9V 9v w Same as at right Same as at right Start x.sv ~- I I I 1 IC302 (SV ITC4011 BP) Start T1 Same as at right Stop 41 ~~ 5V Ts ® Same as at right SV Start C Start OV OO OV 5V Stop OV v T ® Same as at right Start 5V , Stop O y, 5V -~ Sv Same as at right B t Same as at right Same as at right 5V T4A 0202 (2SD637) E T5 Stop , OV I~t'~ Sv © t . SV BLOCK DIAGRAM Position detection coil 0 U D201 D202 D201 D202 S203 (33 r .p .m. indicator) (45 r .p .m . indicator) (33 r .p .m. switch) (45 r .p .m . switch) (Start/Stop switch) 01-2 .3 D1 AC line 50/60 Hz Rectifier IC201 (AN6680) IC301 (AN6682) Speed control 0.S.C 0203 0 ~ ca f E ~E c C.R OSC c0 cli 1 P.C C .P PF u u CD ci _ vCC 2 3 9 { ! 0 U ~7 ,n 0 M v S301 VR303 SrtUU'a 16 ~C " tV h 1~ S301 PITCH LOCK SWITCH SL-1200MK2 EXPLODED VIEWS POWER CIRCUIT P.C .B . SL-12C TONE ARM and ARM BASE ASS'Y REPLACEMENT Notes : PARTS 1. Part numbers are indicated on most mechanical parts . Please use this part number for parts orders . 2 . © indicates that only parts specified by manufacturer be used for safety . 3 . SL-1200MK2(M) +(MI,SL-120wIK2(MC) +[MC1 Ref . No . Part Name & Description Part No . CABINET and CHASSIS PARTS 1 2 3 4 LIST (Mechanical) 6 7 8 9 10 Dust Cover Turntable Mat Turntable Cover, Turntable Cover, Stater Frame Ass'y Stater rame FG Detector Coil Ass'y Shaft, Stater Frame Ass'y Plate, Shield Cabinet 11 12 13 14 15 16 17 18 19 20 SFUM172-04 SFKT122-01 SFKK122-01E SFKTO15-06 SFQA122-01 SFUM122-01 SF KTbtS-01E SF DJ I22,02E SFGZ122-01 SFYB5-32 Ornament, Stylus-illuminator Knob, Power Switch Case, Strobe-illuminator Knob, Start/Stop Switch Spring, Start/S1op Knob Base, Operation Knob, Speed Selector (33-1/3r .p .m .) Connector, 7-PIN Spacer, Rubber (Speed Selector) Ball, Switch Cam 21 22 23 24 25__ 26 27 28 29 30 SFQA520-01 SFUM122-03 SFUM015-11 SF KK172-01 SFXB122-02 SFQA172-01 SFXJ172-01 SFUP122-02E SFUP122-03 SFDJ122-03E 31 32 33 34 35 36 37 38 39 40 SFX0172-01 SFQA520-01 SFQA001-02 SFXJ172-05 SFHKO40L SFUP025-01 RJASVA SFUP132-03 SFGC122-01 SFUP122-10 41 42 43 44 45 46 47 48 49 50 SF KT122-02 SFKK122-03 SFUZ122-01 51 52 53 54 55 IM] 65 [MCI 56 57 58 ' F 1 SFUP122-01 SFDJ122-01E SFUP122-13 SFAU122-01 SFUP122-05 SFUP122-04 SFUM170-07 SFGC122-02E SFUP122-06 SFKTO15-02E SFNN122M01 SFNN122COI SFX0122-01 SFX0122-02 SFAT122-01A TONE ARM and ARM BASE SFPCC31001 K SFPAM18201 K SFPWG17201K SFPRT18201K SFPZB17202 SFQA829-03 SFPAB13202 SFPJL18202K SFPZB12203 SFUM170-06 SFPZB12204 SFPAB18201 K SFPZB12201 K 61 62 63 64 65 66 67 68 70 71 72 73 74 75 [M] 75 (MC) 76 77 78 79 80 81 - SFAD122-01A SFTG172-01 SFTE172-01Z SFUM172-05 SFMGQ20401 SFMG520-31A SFMZ172-01E SFMZQ20-01A SFUP122-12 SFAC122-01 - Ref . No . - " Head Shell Tone Arm Ass'y Balance Weight Ass'y Lift Assy Knob, Arm Base Lock Spring, Lift Ass'y Knob, Arm Lift Oil Damper Plate, Arm Base Cover Spacer, Phono Cord Clamper, Phono Cord Tone Arm Fixing Plate Ass'y Plate, Position Fix Phono Cord Phono Cord GroundWire Arm Rest Arm Base Ring, ng, Arm Base Operation Bracket, Arm Base Knob, Anti-skate Force Control XTN3+88FZ -FXGQ20-02 XTN3+88 XTN26+88 XTN4+10B XWA48 XUC3FT XUC2FT XUC25FT SFXW910J02 Screw Screw Screw Screw Screw Washer Circlip Circlip Circlip Washer XTN3+408FZ XSN3+10BVS XWE3F12FZ XTN3+25BFZ SFXW122-01 XWE3E10 SFPEW1100 SFPEW11003 XSN3+BS SFXG132-01 Screw Screw Washer Screw Washer Washer Washer Washer Screw Screw 0 0 XTV3+BBFN XTN3+108 XTN2+108 XSN17+3FY XSN3+149 SFXW172-04 XUB14FT SFUZ172-05 XTN3+6B XSN3+8S XWA3BFZ XWA38 XWG3 SFXG829-1 XUCSFT XTW3+SB XTV3+88FN XWE4A10EW Screw Screw Screw Screw Screw Washer Circlip O Ring Screw Screw Washer Washer Washer Screw Circlip Screw Screw Washer 0 0 0 0 0 XTN3+258 XYN3+C6FZS XSN3+128VS SFPEW17201 XWG26 Screw Screw Screw Washer Washer ACCESSORIES A1 [MI A1 [MCI A2 A3 A4 A5 A6 A7 A8 SFNU122MOl SFNU122C01' SFWE010 SFPEN3302 SFPEW9601 SFCZV8801 SFPEV9801 SFK0135-01 SFPZB3501 Instruction Book Instruction Book Adaptor, 45 r .p.m . Nut, Cartridge Washer, Cartridge Screw, Cartridge Screw, Cartridge Overhang Gauge Shell Weight P1 [M] P1 [MCI P2 P3 P4 P5 P6 P7 SFHP122MOl SFHP122COl SFHH122-01 SFHH122-02 SFHD122-01 SFHD122-02 SFHD122-03 SFYH60X60 P8 SFYH40X45 Carton Carton Pad, Front Pad, Rear Pad, Top Pad, (A), Turntable Pad, (B), Turntable Polyethylene Cover, Turntable Unit and Dust Cover Polyehtylene Cover, Turntable 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 - Knob, Pitch Control Volume Ornament, Pitch Control Volume Shading Cloth, Pitch Control Volume Hqlder, LED - Bucket, Pitch Control Volume Connector, 4-PIN Supporter, Bottom Base Base, Bottom Supporter (A), Hinge Supporter (B), Hinge Case, Hinge Audio Insulator Supporter (C), Hinge Knob, Speed Selector (45 r.p .m) Name Plate Name Plate Pipe (A) Pipe (B) Hinge Ass'y SFDH360MOl SFDH028-01 SFP 1 720 SFPKDKD1720 SFPKB 1 7201S SF P 12201 SFPAB 17206 Part Name & Description SCREWS, WASHERS and CIRCLIPS Spring, Switch Cam Cam, Switch Spacer, LED Cover, Lamp Boss, Drive Spring, Drive Boss Pin, Lock Canceler Bracket, Stylus-illuminator Plate, .Lock Operation Connector, 3-PIN Pin, Guide Spring, Lock Canceler Pin Spring, Lock Operating Plate M'tg Pin, Lock Operating Plate M'tg Clamper; AC Cord Bracket, AC Cord AC Cord Bracket, Power Transformer Cushion, Power Transformer Spacer, Power Transformer Part No . - PACKINGS EXPLODED VIEWS 20 Printed in Japan
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Key Features
- Quartz direct drive for precise speed control
- Brushless DC motor for low noise and vibration
- Heavy aluminum diecast platter for excellent stability
- Universal tonearm with adjustable height and overhang
- Built-in strobe illuminator for accurate speed adjustment
- Electronic brake for quick and precise stopping
- Pitch control for fine-tuning the playback speed