Pioneer pl 550 service manual

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PL.5iEicl lIItIIr MODEL PL-550 COMES IN THREE VERSIONS DISTINGUISHED AS FOLLOWS: This seruice manual is applicable to the PL-550/5, ST type. When repairing the PL-550/HGT type please see the manual on pages 43-48. Type Voltage Remarks HGT 22OY and 240V (Switchablel SEMKO (Sweden), NEMKO (Norway), DEMKO (Denmark) and El (Finland) approved model without phono cartridge. S 1 10V, 120V, 22OV and 240V (Switchablel General export model with phono cartridge ST 11OV, 120V,22OV and 240V (Switchable) General export model without phono cartridge CONTENTS 1. SPECTFTCAT|ONS.... 4 2. PANEL FACILITIES .. . 5 3. PARTS LOCATIONS .. .. 7 4. EXPLODED VIEW 11 5. NOMENCLATURE OF SCREW, WASHERS AND NUT . 16 6. SCHEMATIC DIAGRAMS, P.C. BOARD PATTERNS AND PARTS LIST 6.1 Schematic Diagram 17 6.2 Drive Control Assembly (PWG-008) . . . 19 6.3 Power Supply Assembly (PWR-822) 22 6.4 Positional Detector Assembly (PWX-006) 24 7. PACKING 25 8. OPERATING PRINCIPLES CIRCUIT DESCRIPTION 8.1 Block Diagram 27 8.2 Motor Operation 29 8.3 Waveforms 36 9. TROUBLE SHOOTING GUIDE 9.1 Motor Does Not Rotate 37 9.2 Motor Run-away 38 9.3 Motor Alternates Between Forward And Reverse Rotation 39 9.4 Unstable Rotation Near Rated Speed 39 10. ADJUSTMENT PROCEDURES 40 11. D.D MOTOR EXPLODED VIEW .. PL-550 Additional Service M'anual Enclosed Herewith PL-550X/ST differs from PL-550at the point of cabinet appearance; it is black cabinet. Except packing case and cabinet all of compo- nents are same as PL-550. J

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1. SPECIFICATIONS Motor and Turntable Semiconductors Motor. ....QuartzPllHall motor lCs... 2 Turntabfe Platter . .324mm diam. aluminum alloy die-cast Transistors g Moment of Inertia . . . 340kg.cm2 (including platter mat) Diodes 1 1 Speeds . . 33-113 and 45rpm Hall elements 3 Speed Control Range . . . . . . !6%o Wow and Flutter Less than O.O2|yo (WRMS) Accessories Signal-to-Noise Ratio More than 70dB (D|N-B) 45rpm Adaptor . . . . . . l Overhang gauge . 1 Rotational Characteristics Screwdriver 1 Build-up Time . . . . . . Within24o" rotation at33-1l3rpm Sub weight l Speed Deviation . . . Less than 0.003% Cartridge mounting screws (ST, HGT type) . 6 Speed vs. Load Characteristics. . . . Stable up to 120 grams Cartridge mounting nuts (ST, HGT type) 2 drag load Cartridge mounting washers (ST, HGT type) 2 Speed Drift . . Less than 0.0003% lh at 33-1 l3rpm Operating instructions I _ Less than 0.00004%/degree temp. change at33-1l3rpm Miscellaneous Tonearm Power Requirements . . . . Ac 110-120-22o-240y 5ol60Hz Type . Static-balance type, S-shaped pipe arm Power Consumption . . . 5W Effective Arm Length . . . . 221mm Dimensions 490(W) x 1S5(H) x 390(D)mm overhang . . 15.5mm l9-sl16(W) x7-s116(H) x ls-3ls(D)in. UsableCartridgeWeight . 49 (min.) to 14.59 (max.) Weight ,t2kgl26tb6oz (For cartridge weighs over 9.5g, attach the sub weight) Arm Height Adjust Range t5mm lfLfri"trr"rs and design subject to possibre modification .. without notice, due to improuements. )uDTUnctlons Anti-skating force control Lateral balancer Stylu s pressure d irect-readout counter weigh t Arm height adjusting device Cueing device Headshell stand Strobe light Free stop hinges Insulator feet Furnished Cartridge (S type) Type.. ...MovingmagnettypePC-550E/ll Replacementstylus. ...PN-550E/ll StylusTip ...0.3x0.7mildiamond Output Voltage. . . . 3mV (at 1kHz,50mm/s RMS) Tracking Force . 1.0g to 1.8g (proper 1.5g) Frequency Response 10 to 30,000H2