User manual TECHNICS SL-1200MK2

Service Manual experienced repair technicians This service literature is designed for public . It does not and is not designed for use by the general only of cau:'.ons to advise non-technical individuals contain warnings or a product. Products powered potential dangers in attempting to service repaired only by experienced by electricity should be serviced or attempt to service or repair the product professional technicians. C.iy t;+ anyone else could or, ,products dealt with in this service literature injury or death . rest'' in.. serious ORDER NO . SD7908-1601 SL-12 OM K2 (M), (MC) A WARNING Turntable System " The model SL-11 200MK2 (M) is available in U .S .A . only . *The model SL-1200MK2 (MC) is available in Canada only . SPECIFICATIONS Power supply : Power consumption : Dimensions : (WxHxD) Weight : 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 Rumble : -56 dB (I EC 98A Unweighted) -78 dB (IEC 98A Weighted) 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 General 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 : Type : Effective length : Arm height adjustment range : Overhang : Effective mass : Offset angle : Friction : Tracking error angle : Tonearm section 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 . Stylus pressure adjustment range : Applicable cartridge weight range : (with auxiliary weight) : (with shell weight) : Headshell weight : Cud Matsushita Electric Industrial Co . Ltd. All rights reserved . Unauthenzed copying and distribution is aviolation of law Matsushita Electric of Canada Ltd . 5770 Ambler Drive, Mississauga, Ontario LAW 2T3 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 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 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 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. Lamp caset Fig . Fig . 9 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) 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 . 4 SL-1200MK2 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 . FEATURES 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 SL-1200MK2 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 . ADJUSTMENTS 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 ~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- 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 .) accomre done braking is con, rather itor for control eration . )n with (t) : ig . 17 appears stahonary at the pitch (2) appears stahonary at the pitch slat, onary at the pitch f3f appears (4) appears stahonary at the pitch of ,611, of " 3.3% o ;11 o3 3% Fig . 19 Schematic Diagram 2 A (This schematic diagram maybe modified at anytime with the development of 3 4 5 D1 6 SVDSl RBA20 7 Q C POWER SWITCH 120.6 {YtiO--~ iF R601 r1 4.7 350MA ~pnai ORG T .I J Q3 R5 4 B AC 117V (50/60Hz) BLU °} C TP4 SVORD5.1E ' D2 C R204 2. D Braking adjustment TP21 R205 VR201 R215 4 .7K R214 22K IC201 50KB TP22 E A N 6680 F Adjustment of pitch control ±0%(Pitch) Pitch Adjustment (GAIN) TF Q202 G VR303 MA150 D204 5203 S/S 5201 33 1 5202 45 SVDSR105C D201, 202 PITCH LOCK SWITCH PITCH CONTROL VOLUME SPEED SELECTOR SWITCH STR( H 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. IMPORTANT SAFETY NOTICE u ,development of new technology .) 7 ~ 8 9 10 fP3 220 P19 OVI .213 Ilop i D206 5401 WITCH 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 . D204 D205 PLl REPLACEMENT PARTS LIST (Electrical) Notes : 1. 2. 3. Ref . No . 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 Part No . Part Name & Description Ref, No. 8108 8109, 110 R201 R202 8203 R204 8205 R206 8207 R208 R209 R210 R211 R212 R213 8214 R215 R216 8217 R218 R219 R220 R221 8301 R302 R303 R304 R306 R601 CAPACITORS Cl C2 C3 C101, 102 C103 C104,105 C106,107 C108 C109, 110 C111 0112 C201 C202,203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C216 C301,302 C303 C304 C305 C306 C601 [MI C601 [MCI © ECEBlHS471 ECEAIVS330 ECEAIES220 ECEAlVS330 ECEAlVS330 ECQMlH104KZ ECQMlHl04KZ ECEAlES101 ECQMIH104KZ ECQMlH562KZ ECEAIJS4R7 ECEAICS330 ECEA50ZI ECQMlH473KZ ECEA1AS221 ECEA50ZI ECCDIHt01K ECCDlH390K ECEAIES101 ECQMlH224KZ ECQMlH473KZ ECEA50Z3R3 ECCDlH47lK ECEAIES101 ECEA50Z1 ECEAIES470 ECQK1123FZ ECEA50ZI ECEA1HS100 ECQMlHl22KZ ECEA50Z1 ECQFlA473MD ECQUIA473ME Electrolytic, Electrolytic, Electrolytic, Electrolytic, Electrolytic, Polyester, Polyester, Electrolytic, Polyester, Polyester, Electrolytic, Electrolytic, Electrolytic, Polyester, Electrolytic, Electrolytic, Ceramic, Ceramic, Electrolytic, Polyester, Polyester, Electrolytic, Ceramic, Electrolytic, Electrolytic, Electrolytic, Polyester, -Electrolytic ;`' ElectrOiytic, Polyest& ; " Electrolytic, Polyester, Polyester, 470yF, 33juF, 22/AF, 33juF, 33pF, 0 .1PF, 0 .1,uF, 100UF, 0,1yF, 0 .0056pF, 4,7pF, 33pF, luF, 0 .047liF, 220pF, luF, 100pF, 39pF, 100pF, 0.22pF, 0.047pF, 3.3pF, 470pF, 100pF, 1uF, 50V 35V 25V 35V 35V 50V, 50V, 25V 50V, 50V, 63V 16V 50V 50V, 1ov 50V 50V, 50V, 16V 50V, 50V, 50V 50V, 25V 50V A © Part No . ERD25FJ103 ERXIANJ4R7 ERGlANJ561 EAD25FJ103 ERD25FJ470 ERD25FJ272 ERD25TJ124 ERD25TJ"183 ERD25TJ563 ERD25TJ224 ER025TJ154 ERD25TJ183 ERD25FJ103 ERD25FJ121 ERD25FJ122 ERD25TJ223 ERD25FJ472 ERD25TJ154 ERD25TJ223 ERD25FJ102 ERD25FJ332 ERD25FJ221 ERD25FJ471 ER025CKF3301 ERD25FJ471 ERD25FJ822 ERD25FJ152 ERD25TJ223 ERD25FJ4R7 Part Name & Description Carbon, Metal Film, Metal Oxide, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Carbon, Metal Film, Carbon, Carbon, Carbon, Carbon, Carbon, 10kn, 4 .7fl, 560fl, 1Okfl, 47fl, 2 .7kfl, 120kfl, 18kf1, 56kfl, 220k fl, 150kfl, 18kf2, 1OkQ, 120fl, 1 .2kfl, 22kfl, 4 .7kfl, 150kfl, 22kf1, lkfl, 3 .3kf2, 22012, 47012, 3.3kfl, 470(2, 8.2kf2, 1 .5kfl, 22kfl, 4 .7(2, 1/4W, 1W, 1W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 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 t t t t t t t t t t t t t t t t t t t 5% 5% 5% 5% 5% 5% 5% 5°% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1% 5% 5% 5°% 5% 5% INTEGRATED CIRCUITS IC101 IC201 IC301 IC302 TRANSISTORS Q1 Q2, 3, 202 Q201 Q203 DIODES D1 D2,301 D204 D201, 202 D203-206 D401 CRYSTAL X201 SVQU306115 Crystal, 4 .19328MHz Oscillator A SVDSIRBA40 MA7051 MA162A SVDSR-105C SVDEBR5505S SVDGL-9PG2 Rectifier Diode,Zener5 .iV Diode Light Emitting Diode Light Emitting Diode Light Emitting Diode 2SD389A-Q 2SD637 2SC1846-R 2SC1328-T Transistor Transistor Transistor Transistor AN6675 AN6680 AN6682 SVITC4011BP Integrated Integrated Integrated Integrated Circuit Circuit Circuit Circuit VARIABLE RESISTORS VR201 VR301 VR302 VR303 SWITCHES S201 5202 S203 5401 S601 LAMP PL1 TRANSFORMER Tl FUSE F1 RESISTORS R1 R2 R3 R4 R5 R101 R102 R103 R104 R105 R106 R107 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, 6 .6k fl, 6 .8kfl, 2 .7kfl, 560fl, 470fl, 10kfl, 4 .7fl, 4 .7kfl, 47kQ, 10kfl, 1511, 1 .511, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1/4W, 1W, 1/4W, 1/4W, 1/4W, 1/4W, 1W, t t t t t t t t t t t t 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% © XBA2FO3NU100 Fuse, 350mA © ~SLT60EL)713 Power Transformer SFDN122-01 Lamp, Stylus-illuminator EVQP5RO4K EVQP5RO4K SFDSSS5GLl3C SFDSD2MSL-4 SFDSSS5GL-2 Switch, Switch, Switch, Switch, Switch, Speed Selector (33-1/3r .p.m .) Speed Selector (45r .p .m .) Start/Stop Stylus-illuminator Power EVLS6AA00a54 EVMH2GAOOB53 EVLS6AAOOB54 EVBJ05Cl9ABE Braking Adjustment (BRAKE), 50k(1 (B) Adjustment of Pitch Control f0°%(PITCH), 5kn (B) Pitch,Adjustlnent (Gain) 50kfl Pitch Control Volume t10% t10% t10% t10% © t10% t10% t10% 110% t10% t10% © © A 47uF, 25V 0.012pF, 125V, I#F, 50V 10pF, 50V 0.0012pF, 50V, 1pF, 50V 0.047pF, 400V, 0.047pF, 400V, t 1% ±10% t20% t20% © 0 TERMINAL GUIDE OF TRANSISTOR AND IC AN6675 AN6680 J22 1 12 13 12 ~~ 1 123456189 AN6682 SVITC4011BP 2SC1846 2SC1328 2SD637 2SD389 r 13 F 1: BC TROUBLE SHOOTING Power switch doesn't operate Power circuity check " TP5 - 20V NO F1, S601, T1 D1, 61.1 -Q3 (B) I It doesn't rotate Start/Stop switch "push" Reference voltage circuity check " TP5-20V YES Control circuity check " Check voltage and wave form at IC201 NO NO IC201 X201 Drive circuity check " Check voltage and wave form at IC101 YES heck voltage on Q201 " Base voltage - 10V NO Q201 Runaway operation Reference voltage circuity check " TP5- 20V YES Control circuity check " Check voltage and wave form at IC201 NO Q1 -Q3 D2 NO IC201 Drive circuity check " Check voltage and wave form at IC101 YES FG circuity check " Check voltage on Q203 NO NO Q203, FG coil Turntable rotates abnormally 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 changeover is defective Speed select circuity check " TP13 -3 .4V " TP14-0V NO IC201 S 201, S 202 13201, 13202 (F) Strobe not illuminating Check voltage at TP28 and TP29 " TP28 - 18AV " TP29 - 9.6V NO Q202 13203-. .13206 Printed Circuit Board 2 A D202 + B lines Earth (Ground) lines r r SPEED SELECTOR SWITCH 02 B S20f 133 C START/STOP SWITCH D E D204 D203 POWER TRANSFORMER F G AC 117V (50/60 Hz) BLU H ORG BLU BRN RED 5401 STYLUS-ILLUMINATOR SWITCH BLK NL1 IC302 BLK R401 1 .5K IC301 RED ORG ORG BRN AN6682 YEL SVITC4011 BP r - 470 E T zv 2S D389 Q1 2SC1328 73 . . -8 .2K r~ Q203 1+ 16VID0 R21J t~ .Mr305 0 .0012 IF. P2~4~~ .'2 ~91 TP27 fi, k 7P74 BRN RED ORG YEL R221 470 "---Mh-.-" R 219 :: R216 C202 50'11 R211 10K TP23 TP C21 3.3 150F . iH. FT 'T04 0 .0 "' (6 R204-I F . Q201 2_7K c2c5 10 s L __" PSi4T'~ A k 0203 OOVI aft206 5f 1 C20 X201 x-11 p (201 gar C109 G -if-R10 .1 1 R101 Rt R5 470 C101 25V33 DV33 10" 405 ll!t 0163 2v +3 5-of O 6 8212 '20 nC C106 01 ~ RI :In }1. rc, -At~ BRN RED ORG YEL BLK BLU PPL BLU S601 POWER SWITCH AN6680 Q262 1601 NOMINEE 2SC 1846 0201 _ BLU B LU A N 6675 IC101 2S D637 Q2, 3 2SD637 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 Adjustment of pitch control t0% (PITCH) Adjustment of pitch control gain Braking adjustment (BRAKE) after replacing parts such as IC's, transistors, diodes, etc. . ON . Center position . 33-1/3 r.p .m . (D Connection Points Frequency counter (2) -. TP27 0 - GROUND Tester TP31 and TP32 - Adjustment Point VR301 Adjustment Method 1 . Pitch control switch to center position . 2. Adjust VR301 for 262.08 kHz 10 .05 kHz of frequency. Adjust VR302 for 2.7 k92 t0.1 of resistance value Adjust VR201 for complete stop within 120° - 270° after stop signal initiated . (Turntable becomes free a few seconds after stop) STOP SIGNAL O A B VR302 OO C VR201 2700 Turntable &1 0 REFERENCE VOLTAGE AND WAVEFORM AT EACH IC PIN IC101 (AN6675) Start 2V © ~3 Stop 2V (04""W 2V,~, , .. ov © Start = Stop 15V Start Same as at right 1"" Stop 2V sv 0v sV oV ® ,uV O Os © OO 08 5V ( 'S 5V 6 .6V ov 5V 15v sV q sv 0 S -0 0 ' ,.,_ © © 15V 15V ~ 15V 209. , (S , f T 15V 20V © ® 20V 20V 0 .2v 1 .7V 20V ao .6 20V 10 .1 20V o .l, 0.2V , t 1 .7V C Q2 © r *40"1 © 15V ov T 15V ov © 15V 15V IC201 (AN6680) Start Ot Stop 2 .5V 41. Start ® 1) 2 .5V Same as at right Stop . Ov 9 .8V L IM Q OO t I ® Start 5V 5V Ov 7 .5V OV 1 .5V i 3V stop -: OV 9 .8V 2 .5VZ,OV 5V OV,?,7. ,V` Ov Sv OV 3V r 3V 2 .8V T fl fl uu w A tov - iov ,3J o 9v T Same as at right Same as at right © Ov 20- 4.4 ,qY 6v Ov T , ® ® Same as at right v.xw 7 ~oxw x.sv ®3 0 .2V ~~ IV 2 .8V T5 Same as at right 3 .4V OV -[A-,-!V 3 .4V OV i ® ® 2.5V © T7 © sv S .SV 8v IC301 (AN6682) Start Tt Stop sv T ® Start Same as at right OV 3 .9V Same as at right Stop Start Stop -v Same as at right J U LJ L lhft Ov ,., ® TB Same as at right 9V - T' T Same as at right 'v TO © 3 .9V,(A w 9v Same as at right x.sv ~IC302 (SV ITC4011 BP) Start T1 Same as at right 5V Ts ® Same as at right SV T4A Stop 41 ~~ 5V -~ Sv 5V I I I 1 Start T5 Stop y, O Start Stop Same as at right 5V OO ® OV Same as at right 5V , OV I~t'~ Sv © , t. SV 0202 (2SD637) E C Start OV Same as at right T B t Same as at right Stop OV v 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 ~ ca f E ~E 0 c cli 1 CD 0 c