DIRECT DRIVE STEREO TURNTABLE
Contents
1. 45 SPEED Button Depress to play 45 rpm records Function Lever This lever incorporates power switch and arm elevation functions e OFF AC power is cut off e ON UP Power is turned ON When set from DOWN to this position the tonearm is raised e DOWN Tonearm is gently lowered 10 Set function lever to OFF Power will be cut off and strobe lamp extinguished 11 It is advisable to replace the stylus cover for protection whenever the turntable is not in use OPERATING PRECAUTIONS e Keep stylus and records clean Use a stylus brush to clean the stylus and a good quality record cleaner to clean the records each time before and after playing Avoid exerting unnecessary force on the tone arm When changing headshells set the tonearm in the arm rest and engage the clamp e Take care not to impart vibration to the turn table while a record is playing Record and stylus can be damaged Avoid placing more than 2 records on the turntable platter while playing records 3 PARTS LOCATIONS 3 1 TOP VIEW Headshell stand PNW 073 Main panel PNW 225 Rubber grommet A PEB 010 Strobo case assembly PXA 221 Output cord PDE KCT PDE 016 KUT AC power cord KDG 011 Output cord Rubber grommet B PDE 004 KCT PEB 011 PDE 016 KUT AC power cord Lateral bar Lateral weight KDG 011 PLA 586 KLA 438 2 TO PREVENT ELEC SHOCK REMOVE ONLY TACCED 558 DO WOT FEMOVE COVER NO USER VICTABLE2. YES WIDE VARIATIONS IN MOTOR SPEED Is the voltage between ter minals 4 and 6 8 or 10 app 8 9V roughly the same as that between ter minals 4 and 7 9 or 11 YES With the power OFF is the resistance between terminal 4 and 1 2 or 3 equal to 64152 The plus test lead should be connected to terminal 4 YES Disconnect the diodes of block 5 D D and D and check them with a test meter Are they conductive in for ward direction or non con ductive in backwards direc tion Check each of the voltages in block 4 Hall effect element H H or H is defective Motor wiring is defective High resistance open cir cuit Low resistance short Defective diode Even if only one diode proves to be defective the complete set of three should be replaced Block 3 is defective Is the voltage across R49 on block 3 approximately con NO Shaft or bearings defective stant without significant change 30 8 3 MOTOR RACES Check the connections to terminals 12 13 and 15 Is the voltage between Q base on the NO driving current control assembly and Block 2 is defective terminal 4 equal to 2 8V x Block 3 is defective x PL 510A 31 9 ADJUSTMENT 9 1 MOTOR SPEED When it proves impossible to adjust the fine speed controls to give the correct speeds the motor may be adjusted as follow
3. 10 q assembly PWG 007 BRN 5 Power supply assembly B ms PWR 006 An 818 Qi Qis 2SA 133 x2 2SC1000 x2 Ras VR 4 7K B POWER SW Ras Da Ds VD1222 x2 i S AC assembly A 120V PWR 816 28 8 TROUBLE SHOOTING CHART 8 1 MOTOR DOES NOT TURN Is there 18V across terminals 4 and 5 of the driving current control assembly YES x Is there 9 4V between the emitter of Q17 and terminal 4 Power supply circuit defective Block 1 on the General Circuit Diagram page 27 is defective YES Is there 2 8V between terminals 4 and NO 12 at 33 1 3 rpm Check the connection to terminal 14 YES Block 2 is defective Is the voltage between terminals 4 and 6 8 or 10 app 8 9V roughly NO Hall effect element H H or Hj is defective the same as that between terminals 4 and 7 9 and 11 YES With the power OFF is the resistance ae I Motor wiring is defective between terminals 4 and 1 2 or 3 NO jin S S AAN 64452 The plus test lead should a k 2 be connected to terminal 4 sn ene YES Check each of the voltages in block 4 are the values incorrect Block 3 is defective 29 8 2 With the power ON rotate the turntable slowly by hand about five seconds for each complete rev Do the collector voltages of Qi Qs and Qj cycle between O and 17V
4. 321mm diam aluminum alloy 240kg cm including rubber mat Static balance S shaped pipe arm 221mm 3 1 15 5mm 4g min 10g max For cartridge weighs over 8 5g attach the sub weight SUBFUNCTIONS Anti skating force control Plug in type headshell Oil damped arm elevator Hinges Free adjustable Lateral balance weight Fine speed adjusters 33 1 3 rpm 45 rpm using the stroboscope for turntable speed adjustment ACCESSORIES Headshell Overhang gauge EP adaptor Screwdriver Sub weight Cartridge mounting screws Cartridge mounting nuts Cartridge mounting washers Operating instructions MISCELLANEOUS Power requirements Power consumption Dimensions Weight AC 120V 60Hz 5W 440 W x 362 D x 159 H mm 17 5 16 W x 14 1 4 D x 6 1 4 H in 8kg 17lb 100z NOTE Specifications and design subject to possible modification without notice due to improvements 2 PANEL FACILITIES Headshell Stand A spare headshell can be stored in this stand Align the headshell pins with the stand grooves and insert Observe that the headshell length is not greater than the height of the dust cover This stand can also be used for storing the EP adaptor Stroboscope Fine adjustments of rotation speed can be performed with the aid of the stroboscope Adjust the SPEED ADJ knobs while observing the pattern indicated bellow If the rotation is fast the pattern will appear to move to
5. the voltage across each drive coil drops and the base poten tial of Q 4 rises This causes the collector current of Q to increase and the current s through Q1 Qs Q and 2 Q6 also rise As the collec tor current s of Q Qio increase the base potential s on Q4 Qs Q drop the collector current s rise the magnetic field strength of the drive coil s increases and the rotor speed in creases to the correct value 7 4 TEMPERATURE COMPENSATION The section which corrects the speed of rotation of the motor as the ambient temperature changes comprises varistors D4 Ds Dg D7 Ds Dio Dii to achieve temperature compensation e D compensates Q3 Q and Q If D were not provided an increase in temperature would be accompanied by a drop in the Vg of 9 and and an increase in the collector currents This would result in a drop in the base potentials of Q4 Qs and Q and an increase in their collector currents with in turn a higher current through the drive coils and a corresponding increase in the speed of revolu tion The temperature coefficient of D VD1222 is 3 6mV C which ensures that the bases of Q Q and Q do not drop in potential so that the motor speed will not in crease e D compensates If were not provided an increase in temperature would cause an increase in collector current and a cor responding increase in Q14 Q 15 Qis Q 13 with a
6. Supply Assembly A PWR 818 Myler 0 033 250V PCL 013 Myler 0 033 250V PCL 013 Metal oxide 10k 2W RS2P 103J Fuse Fuse clip 315mA KEK 008 KKR 001 38 13 2 POWER SUPPLY ASSEMBLY B PWR 008 FU 400 mA PCX 010 Qe 256372 Q1 250234 e Ds WZ 192 C2 C3 0 01 9 100 25 ot 6 O Parts List of Power Supply Assembly B PWR 008 Electrolytic 330 35V CEA 331P 35 Electrolytic 100 25V CEA 101P 25 Ceramic 0 01 50V CKDYF 103750 Carbon film 3 3k RD1 4PS 392 2SD234 2SC372 Transistor Transistor Diode Zener diode PCX 010 WZ 192 PEK 005 KKR 001 Fuse Fuse clip PL 510A 39 PIONEER ELECTRONIC CORPORATION 4 1 Meguro 1 Chome Meguro ku Tokyo 153 Japan U S PIONEER ELECTRONICS CORPORATION 75 Oxford Drive Moonachie New Jersey 07074 U S A PIONEER ELECTRONIC EUROPE N V Luithagen Haven 9 2030 Antwerp Belgium PIONEER ELECTRONICS AUSTRALIA PTY LTD 178 184 Boundary Road Braeside Victoria 3195 Australia MAY 1976 Printed in Japan 76F04M31K gt
7. and the standard voltage for 33 1 3 or 45 rpm rotation is applied to the base of Qis It follows that so long as the rotor is Locational detector section Hall effect L aga Driving current DC power control supply 18V section Standard voltage Moving rotating section of motor Drive coil Pik Comparator Fine speed adjustment control 33 1 3 45 rpm generator section Fig 2 Block Diagram of the PXM 020 turning at the correct speed revs this circuit is balanced If for any reason the speed of ratation of the rotor exceeds the proper value the voltage generated in each drive coil will increase This causes the potential on the base of Q to drop and the potential on the bases of Q 4 and Q 4 rises As the potential on the base of Qj rises the collector current drops and this reduces the potential on the base s of Q Q Qi This results in a reduction in the current flowing through Q Qio and a rise in the potential on the base s of Q4 Qs Q 2 so that the collector current s of Q4 Qs Q12 drop If the collector current drops the field strength of the drive coil also drops the rotor speed drops and it returns to the correct speed of rotation On the other hand if the rate of rotation of the rotor drops below its proper value the process is precisely the reverse of the above
8. assem PWR 006 See page Rubber cushion lt PEB 041 i se k d 5 XM 020 k P C Boardclip M KNK 186 P Te Page on 13 2 A FI ushion Screw 179 PBA 006 Te p DE Screw Kk Ne Ones PBA 019 Drive current control PI assembly PWG 007 D Power tra P PTT 017 Cushion El atspri 3 Fl PEC 015 rin PBH 087 e PE SI PI EN ew PBA OC 1 11 12 Parts indicated in green cannot be supplied i Hinge Tonearm assembly a K PPD 539 See page 16 DS i PXA 108 A Antiskating knob Ta PAD 009 S SF 26x2 E Strain relief SI E MO 2 E32 056 Rubber grommets AP PEB 010 l AC power cord SF KDG 011 Ou Screw PD PBA 019 A ubber grommets B Cable clip PEB 01 1 KNK 113 Rubber cushion PNT 008 d di Dust cover assembly p PXA 159 016 KUT model pa 004 KCT model o ws k d OCM4x8 Antiskating assembly a PXA 641 See page 15 Cabinet PMM 044 Screw PBA 011 Screw PBA 021 RW 3 1 x 13 Screw PBA 011 WN 3 Terminal Cushion KKC 011 E PXA 117 P d RW 3 1 x 13 PT3x1 Terminal 1 4 x PM 3x 10 i KKC 021 x SP holder C x PNW 151 PM 3 x 25 Cushion 3 x 25 D PEC 015 Float spring R PBH 086 i B B I
9. rise in the base potential of Q 3 91 and Qi and an increase in the speed of the motor e D D gt and Ds provide the temperature com pensation for rotor magnetism Magnetic field strength drops at 0 18 C with an increase in temperature For this reason if De D7 and Ds are not provided even at the proper rate of rotation the voltage generated in the drive coils would drop because the comparator would indicate that the speed has dropped and so the motor speed would De 33 1 3 D7 and Ds 45 rpm raise the potential at the base of Qis as the temperature rises preserving the balance of Qi4 and and maintaining proper speed CONNECTION DIAGRAM Da INGO x3 j Q Q3 Qs Qe Qs 2SC945Px6 27 Positional detector assembly PW X 004 Qs Qn An 0 2 C923 xa Bros 270 PL 510A e Dio and Di compensate D and Qi De WZ081 is a zener diode The zener tempera ture coefficient is 0 05 C If D oand Di are not provided as the temperature rises the zener potential will rise so that the VB E of Qi7 drops raising the emitter potential the standard voltage of Qi If the standard voltage rises the speed of the motor also rises This is the reason for the compensation by Dio and Di for the rise in Dg zener potential and the drop in VB r potential of Qiz The tempera ture coefficient of Di VD1124 is 1 9mV nC vector X 004 BLK 4 Driving current control
10. 10A KCT KUT PIONEER 10 SPECIFICATIONS HGT model MOTOR AND TURNTABLE Motor Turntable Drive Speed Wow and flutter S N Turntable platter Moment of inertia TONEARM Tonearm type Effective arm length Tracking error Overhang Usable cartridge weight DC servo motor Direct drive Two speeds 33 1 3 rpm 45 rpm 0 03 WRMS or less 68dB DIN B or more with Pioneer cartridge model PC 135 321mm diam aluminum alloy 240kg cm including rubber mat Static balance S shaped pipe arm 221mm 3 1 15 5mm 4g MIN 10g MAX For cartridges weights over 8 5g attach the sub weight SUBFUNCTIONS Anti skating force control Plug in type headshell Oil damped arm elevator Hinges Free adjustable Lateral balance weight Fine speed adjusters 33 1 3 rpm 45 rpm using the stroboscope for turntable speed adjustment ACCESSORIES Headshell Overhang gauge 45 rpm adaptor Screwdriver Sub weight Cartridge mounting screws Cartridge mounting nuts Cartridge mounting washers Operating instructions MISCELLANEOUS Power requirements Power consumption Dimensions Weight 34 AC 220V 240V 50 7 7W 440 W x 362 D x 159 H mm 17 5 16 W x 14 1 4 D x 6 1 4 H in 8kg 17 Ib 10 oz For Use in United Kingdom only Please note Models employ 3 conductor mains leads Please read the following instructions carefully before connecting THIS APP
11. 3 Screw driver Overhang gauge PEC 012 Headshell assembly Tan KEX 002 NAN Sub weight PLA 563 Cartridge mounting screw KBA 045 Side pad C PHA 023 Cartridge mounting screw B11 657 Cartridge mounting washer Vinyl cover H56 603 Cartridge mounting nut B71 653 Cartridge mounting screw Arm protector R KBA 044 Packing stopper D Packing case KNK 403 D PHG 125 KUT model PHG 126 KCT model Turntable platter PNR 034 1 2 3 17 PL 510A 5 NOMENCLATURE OF SCREWS WASHERS AND NUTS The following symbols stand for screws washers and nuts as shown in exploded view Special screw A Special screw Special screw C Oval countersunk head tapping screw Pan head machine screw Countersunk head machine screw Oval countersunk head machine screw Truss head machine screw Binding head machine screw Pan head screw with spring lock washer Pan head screw with spring lock washer and flat washer Pan head screw with flat washer EXAMPLE PM 3x8 i length in mm 7 diameter in mm d A Symbol 1 t jq a Symbol Description Shape EW E type washer FW Flat washer O SW Spring lock washer Nut 6 H Z WN Washer faced nut TO J H w Fiber flat washer Slotted ma Cone e ED X set screw point i e EJ HS socket umm set Mew OCW Ed ntersunk head wood TT
12. A 6 SP hoder B a PNW 17 PNW 133 P SP holder D Foot assembly 3x 20 w PBA 008 PNW 169 PXA 109 U 2 5 6 4 1 MOTOR PXM 020 NOTE Parts indicated in gr n cannot be supplied PT 2 6x 6 PM 2 6 x 20 PM 2 6 x 30 Locational detector assembly PWX 004 Thrust catch PNW 011 Rubber bush PNT 002 13 PL 510A 4 2 FUNCTION MECHANISM ASSEMBLY PSA 3 x 20 K Fuction lever PXT 035 FW 7 EW 3 j E Microswitch KCT model KSF 016 Spring Within cover PBH 028 Steel ball 4 mm Angle PXT 034 Button unit PXT 036 Lever Steel ball PNW 091 4 mm 13 14 15 4 3 ANTI SKATING ASSEMBLY PXA 641 EV lever PXT 517 EV cam PNW 544 EV spring PBH 506 Wire PXT 523 Arm base PNW 542 Washer PNB 519 PNW 547 AS lever PNW 546 AS spring PBH 023 Bias lever PNW 545 TONEARM ASSEMB PPD 539 Elevation PXA 598 assembly PNT 507 Elevation arm PNW 541 Lateral weight KLA 438 Lateral bar Counter weight PXA 599 16 4 5 PACKING Operating instructions PRB 036 Rubber mat assembly PEA 010 KUT model PEA 013 KCT model PHC 017 Dust cover assembly PXA 159 45 rpm Adaptor Arm protector L KNK 055 PHA 033 Counter weight assembly B Case PHN 005 PXA 599 Side pad PHA 02
13. A733 0 014 Transistor 25C1000 BL Q15 Transistor 2SC1000 BL Transistor 2SC711 F 2SC923 E 017 Transistor 2SC735 Y Q18 Transistor 2S8A733 Q Diode D2 Diode INGO D3 Diode IN60 D4 Varistor VD1222 D5 Varistor VD1222 Varistor VD1124 D7 Varistor VD1124 D8 Varistor VD1124 D9 Zener diode WZ081 D10 Varistor VD1222 Varistor VD1124 NOTE 1 Q Q Q Q Q and Q should on the same circuit board use the same hind and rank of product 2 Q Q Q and Q should on the same circuit board use the same kind and rank of product 3 D D and D should be paired PY Y 006 0 23 6 4 POSITIONAL DETECTOR ASSEMBLY PWX 004 Driving current control assembly No 2 Driving current control assembly No 8 Driving current control assembly No 9 Driving current control assembly No 1 Driving current control assembly No 3 E Driving current control assembly No 6 Driving current control assembly No 7 Driving current control assembly No 4 Driving current control assembly No 10 Driving current control assembly No 5 Driving current control assembly No 11 Parts List of Positional Detector Assembly PWX 004 NN H1 Hall effect element PCX 001 H2 Hall effect element PCX 001 Hall effect element PCX 001 RD PS 102J RD PS 102J RD PS 102 RD PS 331 Carbon f
14. ARATUS MUST BE EARTHED CAUTION 240V MAINS SUPPLY VOLTAGE IS FACTORY ADJUSTED AT 240 VOLTS WARNING IMPORTANT The wires in this mains lead are coloured in accordance with following code Green and yellow Earth Biue Neutral Brown Live As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug proceed as follows The wire which is coloured green and yellow must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured green or green and yellow The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured blue or black The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured brown or red NOTE Specifications and design subject to possible modifi cation without notice due to improvements 2 11 EXPLODED Rubber bush C PEB 038 Output cord PDE 004 AN Washer 5 PNM 005 Micro switch KSF 016 e MM RD Y zd ios PPP L he unm E Ta x E x d ERAB BES SHAKE E Power supply asse PWR 818 PBA 019 a uns FA 35 PL 510A The parts indicated
15. G CHART 8 1 Motor Does Not Turn eee rer eee eee eee nee 29 8 2 Wide Variations in Motor Speed ee nh n nnn 30 8 3 Motor Races oven ye ee a l Y eee ee Rus ERROR eee AA ana Gl 31 ADJUSTMENT 9 1 Motor Speed seria radar edd SER AM EE ME 32 g 2 Arm Elevation sd S ew k A Sus A ae a R 32 Service information for PL 510A KCT KUT is described through pages 4 to 32 PL 510A Additional Service Manual HGT model 10 SPECIFICATIONS li 34 VE EXPLODED VIEW vias E RU o baie SR ba ERE ce acd n wea aed head 35 12 SCHEMATIC 37 13 P C BOARD PATTERN AND PARTS LIST 38 Additional Service Manual ST S model 14 SPECIFICATIONS id s x vei d area yasta or EARN 42 19 EXPLODED VIEW i someone a eau aa Rn ba isque AN 43 16 SCHEMATIC DIAGRAM 45 17 P C BOARD PATTERN AND PARTS LIST 1 SPECIFICATIONS MOTOR AND TURNTABLE Motor Turntable drive Speed Wow and flutter S N Turntable platter Moment of inertia TONEARM Tonearm type Effective arm length Tracking error Overhang Usable cartridge weight DC servo motor Direct drive Two speeds 33 1 3 rpm 45 rpm 0 03 WRMS or less 68 dB DIN B or more with Pioneer cartridge model PC 135
16. PARTS INSIDE REFER WG 10 QUALIFIED SERVICE PERSONN Headshell assembly PXA 630 Operation panel PAN 034 Counter weight PXA 599 Antiskating knob PAD 009 Elevation arm assembly PXA 598 Arm rest assembly PXA 104 Variable resistor PCS 005 Tonearm assembly PPD 539 Button unit PXT 036 Function lever PXT 035 3 2 UNDER VIEW Wire PXT 523 Microswitch KSF 016 I i k k P gt z 4 eee i x de 3 CSR n PENGEN TU A k I r Driving current control assem PWG 007 PL 510A m o a LN GAST cn qp PX P gt 1 Spar y g b c Yo M AL A gt MZ tut bad ESL v mi APA mE TE N m s p a 9 lt gt f gt V Tu E pra TX c i Ter argy v E s vya k p 3 t gt b v 2 d ER se BE etu s em ee b rs boues A A U TN Y f P rm z Power supply assembly B PW Power transformer PTT 017 Motor including drive current control assembly PXM 020 Power supply assembly A PWR 816 as gs N he illins a pros 1 r kE AAA A A EAS AE V TER IL TA Mei X KT B Miving current control assembly WG 007 Arm rest assembly PXA 104 Arm rest unit PXA 103 Arm rest stand PLA 071 Screw PBA 018 Rubber mat Turntable platter PNR 034 Neon lamp PEL 009 Power supply
17. YF 103750 RD PS 332J 250234 250372 PCX 010 WZ 192 PEK 004 K91 006 PL 510A el 6 3 DRIVING CURRENT CONTROL ASSEMBLY PWG 007 Power supply assembly B No 5 Power supply assembly B No 6 Positional detector assembly No 7 Positional detector assembly No 6 Positional detector assembly No 1 Positional detector assembly No 10 Positional detector assembly No 4 Positional detector assembly No 5 Positional detector assembly No 3 Positional detector assembly No 1 Positional detector assembly No 9 Positional detector assembly No 2 Positional detector assembly No 8 Parts List of Driving Current Control Assembly PWG 007 CAPACITORS S on NN C1 Ceramic 0 01 50V Ceramic 0 01 50V Ceramic 0 01 50V Electrolytic 220 6V Electrolytic a2 50V CKDYF 1037 50 CKDYF 1037 50 CKDYF 103Z 50 CEA 221P 6 CEA 2R2P 50 Electrolytic 10 16V Electrolytic Electrolytic CEA 100P 16 CEA 470P 10 CEA 101P 25 22 RESISTORS R201 Carbon film 330 RD VS 331 Carbon film 270 RD1 4VS 271 Carbon film 330 RDAVS 331 Carbon film 270 RD VS 271 Carbon film RD13 4 VS 331 Carbon film 270 RD1 4VS 271 Carbon film 2 2 RD1 2VS 2R2J Carbon film 180 RD1 4VS 181J Carbon film 3 3k RD1 4VS 332 Carbon film RD1 4VS 681J Carbon film 10k RD 4AVS 103J Carbon fi
18. a DIRECT DRIVE STEREO TURNTABLE Service Manual Q PIONEER CONTENTS SPECIFICATIONS obe bl eileen 4 PANEL FACILITIES yer Una A aus W Ra eee RA 5 PARTS LOCATIONS 31 Top cea v aaa ee eee Cae 7 3 2 Under View iz EGER BE AUR a ra a ode EAR 9 EXPLODED VIEW ee ove KUN OA na ah es 11 41 Motor PXM 020 ias Owe oe ee a 13 4 2 Function Mechanism Assembly PEUT eae ee 14 4 3 Anti Skating Assembly PXA 641 I Inn 15 4 4 Tonearm Assembly PPD 539 em Ue Dire ciate 16 4 5 Packing o aad 17 NOMENCLATURE OF SCREWS WASHERS AND NUTS 18 SCHEMATIC DIAGRAM P C BOARD PATTERNS AND PARTS LISTS 6 1 Schematic Diagram E DA ea IT 19 6 2 Power Supply Assembly B PWR 006 III 21 6 3 Driving Current Control Assembly eee nh n n nn 22 6 4 Positional Detector Assembly ee I II in nn 24 6 5 Power Supply Assembly A PWR 816 e IIIA Hn 25 PXM 020 OUTLINE OF OPERATION 7 1 Structure FS A AR AAA 26 7 2 Operation of the Motor See Connection Diagram nnn 26 7 3 Speed Control ocoocorocoomoocococococ orocororororior com 26 7 4 Temperature Composition 0 00 cee ee eee eee hh hh huh 27 TROUBLE SHOOTIN
19. ilm resistor 1k Carbon film resistor 1k Carbon film resistor 1k Carbon film resistor 330 24 PL 510A 6 5 POWER SUPPLY ASSEMBLY A PWR 816 Parts List of Power Supply Assembly A PWR 816 C1 Myler 0 033 KCE 009 Metal oxide 10k RS2P 103J Fuse 300mA E21 030 Fuse clip K91 006 eo 7 PXM 020 OUTLINE OF 7 1 STRUCTURE The PXM 020 is an external rotor type DC motor in which Hall effect elements are used to detect the rotor position with electronic ON OFF switching of the current to the motor windings As shown in Figure 1a the ferrite rotor is magnet ized alternately N and S in 45 segments Figure 10 shows the three Hall effect elements under the rotor The Hall effect elements H H and H3 are fitted 30 apart 120 magnetically so that whatever the orientation of the rotor one of them will experience a Hall potential at a partic ular time 7 2 OPERATION OF THE MOTOR SEE CONNECTION DIAGRAM When the electrical supply is connected to the motor current flows through the three Hall effect elements which go into the operating condition If we assume at this time that a rotor N pole is located at the H Hall effect element position then the Hall potential developed in H sends the base of Q negative and that of Q positive a Top of rotor b Section of rotor STR nt f l Pls SS Ig Hall effect elements a Fig 1 Relative Locations of Rotor and Hall Effect E
20. lements OPERATION Due to this Hall effect potential Q2 turns ON voltage at the Q2 collector drops the poten tail on the base of Q drops and Q turns ON With Q ON the motor drive coil Wi is energized by the collector current and the rotor begins to move After some small movement of the rotor the N pole approaching the Hall effect element H2 causes Qe and Qs to turn ON and drive coil Ws to be energized With further movement of the rotor the N pole approaches H3 Qio and 12 go ON and W is energized The first N pole pass es H3 as the next one approaches H putting Q2 and Q4 ON and thus the rotation of the rotor is continuously sustained On the other hand when a S pole approaches the Hall effect element s H H2 H3 the polarity of the Hall potential changes the base s of Q Qs Qo go positive the base s of Q Qs go negative and so Q2 Qe Qio turn OFF This means that Q4 Qs Qi2 also turn OFF and the current ceases to flow in the drive coil s W W2 W3 7 3 SPEED CONTROL When no current is flowing through a drive coil that is when a S pole is approaching the Hall effect element a voltage proportional to the speed of rotation of the rotor is induced in the drive coil the same effect as with a generator This voltage is rectified by the diode s D D2 D3 and the negative potential derived is applied to the base of Q14 Q 4 and Q form a differential amplifier circuit
21. lm 47k RDLVS 473J Carbon film 27k RD4VS 273J Carbon film 5 1k RD 4VS 512 Carbon film RD VS 132J Carbon film 680 RD1 4VS 681J Carbon fiim 6 8k RD 4VS 682J Carbon film 470 RD 4VS 471J Carbon film 27k RDA4VS 273J Carbon film RD AVS 151J Carbon film 56k RD AVS 563J Carbon fiim 22k RD 4VS 223J Carbon film 2 7k RD VS 272J Carbon film 8 2k RD 1 4VS 822 Carbon film RD1 4VS 393J Carbon film 150 RDYVS 151 Carbon film 47k RD1 4VS 473J Carbon film 15k RD1 4VS 153J Carbon film 3 9k RD1 4VS 392J Carbon film RD1 4VS 123J Carbon film 3 3k RD1 4VS 332J Carbon film 3 3k RD1 4 VS 332J Semi fixed 3 3k B PCP 001 Semi fixed PCP 002 SEMICONDUCTORS Description 25C711 F 2SC458 C 2SC945 P1 2SC711 F 2SC458 C 25C945 P1 2SC711 F 25C923 E 2SA715 C 25A509 Y 2SB564 L 25C711 F 25C458 C 25C945 P1 Transistor Transistor Transistor Transistor Transistor PL 510A 25C711 F 25C458 C 25C945 P1 28C711 F 25C923 E 28A715 C 2SA509 Y 2SB564 L 28C711 F 25C458 c 25C945 P1 250711 25C458 C 25C945 P1 Description 06 Transistor Q7 Transistor 08 Transistor 09 Transistor 010 Transistor Transistor 2SC711 F 28C923 E Q12 Transistor 2S8A715 C 2SA509 Y 2SB564 L Q13 Transistor 2S
22. s 1 Set the fine speed adjustment controls on the stereo turntable to their mechanical centers approx in the middle 2 The separate volume type controls on the P C Board PWG 007 are accessible for both 33 and 45 rpm adjustments Use a small screwdriver to turn these preset controls to give synchroniza tion as indicated by the stroboscopic speed indicator on the record player 3 When even turning the controls fails to give the required adjustment refer to Connection diagram on page 6 and change R 33 1 3 rpm and R 45 rpm within the range 1 5 to 5 6k2 before repeating the adjust ment 9 2 ARM ELEVATION Tonearm elevation is operated by a cable release If the release stretches due to aging or other reasons loosen EV guide screw Fig 1 and adjust cable release anchor condition Perform this adjustment with tonearm elevation in DOWN setting As adjustment standard EV lever unit Fig 2 should tightly contact straight line portion of EV cam Be sure to confirm operation after adjusting 32 Cable oi Z2 EV guide lt Y Lever in DOWN position Fig 1 Cable release EV lever unit TA F are EV cam EV lever unit Fig 2 DIRECT DRIVE STEREO TURNTABLE PL 5IOA HGT Additional This leaflet provides the description of the parts applied only HGT model For detailed instructions on adjustments descrip tion etc please refer to the Service Manual of PL 5
23. the designation and parts number are newly employed as HGT model The parts without description are the same as the parts in the KCT model gu E Sen a Sites tear uu ABRE HUCK y assembly Is B 2 HGT model PXA 641 Rubber mat assembl PEA 013 Headshell assembly PX A 630 Packing case PHG 128 Power supply assem PWR 008 Fuse 0 4A PEK 005 D Fuse clip KKR 001 PRB 039 English Operating instructions ns PRD 016 French German Operating instructiot 35 36 818 YMd NObz 9 91 01 99 Yip oy V Angwasse oy 4 E Anddns uamog B LX 210A Cx O9NI EO 0 3x dSP6IST sg 9 In gn S9 ZD t MS 3 0 D X3 262S2 n ti 9 5 Un Lp Cp 8 ML ya y My CS 089 y y 3 a dem 009 TU NIO3H 03 O C _ TLEISI eS ES Lx eLvsc L_ xo10 x9d rozo Erose 2x 0001957 Sig tip ap te 800 UMd nx g Anqwasse nddns samog NOAYUOI 409 uing O ui es we 00 X Md Arqwasse J 4042948p w0n s0g 12 SCHEMATIC DIAGRAM HGT model BZ 13 P C BOARD PATTERN AND PARTS LIST 13 1 POWER SUPPLY ASSEMBLY A PWR 818 C1 0 033 C3 0 033 FUSE 315 mA E BEL Parts List of Power
24. wa Countersunk head wood screw Round head wood screw FW 9 x1 thickness in mm t diameter in mm d Symbol 48 2 3 6 SCHEMATIC DIAGRAM P C BOARD PATTERNS AND PAF 6 1 SCHEMATIC DIAGRAM A Positional detector assembly PWX 7004 E BLA 4 si B Driving current control assembly PWG 007 8 1 s Qu Qig Qu Qis 2SA 133x 2561000 x C D 1 Q Q2 Qs Qe Qs Ap Da Ds 2SC945Px6 1222x2 21 Ran 47K Celt l6 k ARM i ee ee 1 E 2 3 7 19 20 EB 1 4 5 ERNS AND PARTS LIST ng current control nbuy PWG 007 d A An dis Qu Qis 2SA133 x 25C 1000 x2 Power supply assembly B CPWR 2 006 Q vln Kinn 280735 18V RED a 0250234 Di D4 POX 010 E g 9V e C g IQ a N gt S 3 E 8 iz D x st c x 4 R N a s a 0D cO Q g A D r 1 co d A 5 STE aan D1222 x2 J Power supply AC assembly A ra 20V PWR 816 Ron 47K Ce 10 16 20 A 6 2 POWER SUPPLY ASSEMBLY B PWR 006 Parts List of Power Supply Assembly B PWR 006 De seem fme Electrolytic 330 35V Electrolytic 100 25V Ceramic 0 01 50V Carbon film 3 3k Transistor Transistor Diode Zener diode Fuse Fuse clip CEA 331P 35 CEA 101P 25 CKD
25. ward the left while movement toward the right indicates slow speed Correct speed is obtained Arm Rest when the pattern appears to be stationary Supports the tonearm when not playing a record At the end of a playing session engage the clamp as illustrated below STROBOSCOPE ARM CLAMP STROBE LIGHT 50Hz 60Hz EP Adaptor Place on center shaft when playing 45 rpm EP records 33 1 3 rpm SPEED ADJ 45 POW ER ARM ELEVATION OFF e n gt a ON UP 3 DOWN TT DIRECT ORIVE STEREO TURNTABLE PL 510A OPERATION Remove stylus cover Set function lever to ON UP Strobe lamp lights and platter rotates Depress SPEED button 33 or 45 according to type of record Employ SPEED ADJ controls and strobo scope to adjust rotating speed required only once per listening session Disengage arm clamp and gently position the tonearm over the desired portion of the record Set function lever to DOWN Stylus will be gently lowered onto the record Adjust volume and tone controls of the stereo amplifier as desired At the end of the record or to interrupt the record set the function lever to ON UP The stylus will be raised from the record Return tonearm to arm rest and engage clamp PL 510A 33 SPEED ADJ Knob Use for fine adjustment of 33 1 3 rpm 45 SPEED ADJ Knob Use for fine adjustment of 45 rpm 33 SPEED Button Depress to play 33 1 3 rpm records
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