Pioneer-PL-L1000-Service-Manual电路原理图.pdf

FS Eefticec%anual LINEAR MOTOR ARM STEREO TURNTABLE PL-L1cI0(f ()rrrorueEr RadioFans.CN 收音机爱 好者资料库 Type VoltageRemarks HET 22OV and 240V (SwitchablelEurope model (without cartridge) HBT22OY and 24OV (Switchablel United Kingdom model (without cartridgel s/G1lOV. 12OV, 22OV,24OV and (Switchablel U.S. Military model (with cartridge) MODEL PL-LIOOO COMES IN THREE VERSIONS DISTINGUISHED AS FOLLOWS: CONTENTS t 1. SPECIFICATIONS 2. PANEL FACILITIES 3. DISASSEMBLY 3.1 Panel . 3.2 D.D. Motor 3.3 Tonearm 3.4 CdS Detector and Lamp 4. PARTS LOCATIONS 5. BLOCK DIAGRAM 5.1 Tonearm Control Stage . 5.2 End Detector Stage . 5.3 Arm Elevation Control Stage 5.4 Size Selector Stage . 5.5 Repeat Control Stage 5.6 Lowering Position Detector, Plunger Control Stage and Descent Signal Generator 5.7 Display Stage and Plunger Driver . 5.8 Manual Drive Stage 5.9 Tracking Sensor Stage and Tonearm Driver Stage 5.10 D.D. Motor Control Stage and D.D. Motor Stop Control 6. CIRCUIT DESCRIPTIONS 6.1 Full Auto Logic . 6.2 Tonearm Drive . 7. ADJUSTMENTS 7.1 D.D. Motor Operating Point Adjustment 7.2 Auto Lead-in Timing Adjustment 7.3 End Sensor Sensitivity Adjustment 7.4 End Timer Adjustment 7.5 Tracking Sensor Zero Point Adjustment 7.6 Tracking Sensor Gain Adjustment . . . . . 7.7 Lead-in and Return Speed Adjustment . . . 8. TIMING CHART 9. TROUBLESHOOTING 9.1 Circuit Block . 9.2 Mechanism Block . 10. EXPLODED VIEWS 10.1 Exterior 10.2 Tonearm 10.3 EV Mechanism 10.4 Bottom Plate . 1 1 . P A C K | N G . . . . 12. SCHEMATTC DTAGRAM (HET,HBT modet). . 13. P.C. BOARD CONNECTION DIAGRAM (HET, HBT model) 14. PARTS LIST OF P.C. BOARD ASSEMBLY (HET, HBT model) 15. SCHEMATIC DIAGRAM (S/c model) 16. P.C. BOARD CONNECTION DIAGRAM (S/G model) 17. PARTS LIST OF P.C. BOARD ASSEMBLY (S/G model) 3 4 6 7 7 I I 1 3 1 3 1 4 1 4 1 4 t 25 25 25 25 26 26 26 27 1 1 13 13 13 13 13 3: l 1 5 21 45 48 50 51 54 55 58 61 63 e a RadioFans.CN 收音机爱 好者资料库 Fr1. SPECIFICATIONS Motor and Turntable DriveSystem . Direct-drive Motor. .OuartzPLLHall motor Turntable Platter . . 31Omm diam. aluminum alloy die-cast Inertial Mass . . . . 330kg-cm2 (including platter mat mass) Speeds . 33-1/3 and 45rpm Wow and Flutter Less than *0.013% (WRMS) o.o25Yo (WRMS) 0.035% (DtN) Values marked with an * designate the wow and flutter j for motor, and do not include the cartridge or tonearm I load. Signal-to-Noise Ratio More than 78dB (DlN-B) (with Pioneer cartridge model PC-600) Rotational Characteristics Build-up Time . . Within 90o rotation at 33-1/3rpm Speed Deviation . . . Less than O.OO2TI Speed vs. Load Characteristics . . . . Stable up to 220 grams drag load Speed Drift . . Less than 0.00008o/o/h at 33-1/3rpm Less than 0.00003%/degree temp. change at 33-1/3rpm Tonearm Type . . LinearMotorDirect-drive Static-balance type, Linear-tracking arm EffectiveArmLength .190mm O v e r h a n g . . . . 0 m m Usable Cartridge Weight . . .49 (min.) to 249 (max,) Arm Height Adjust Range . . t3mm Headshell weight 10.5g Subfunctions Auto lead-in Auto-return Auto cut Ouick repeat Ouick play Ouick stop Styl us pressu re d i rect-readout counterwei ght Arm height adjusting device Cueing device Free stop hinges ) PL-L1 clclcl Semiconductors f C s . . . 2 2 Transistors 17 Diodes 16 H a l l E l e m e n t s . . . . . . . 3 L E D . . 1 4 P h o t o T r a n s i s t o r s . . . . . . 5 c d s . . 1 Miscellaneous Power Requirements HET, HBT models. . . AC22O/24OV - (switchable) 50,60H2 S/G model. . ACl 10/ 12O/22O/24OY - (switchable) 50,60H2 PowerConsumption .35W Dimensions 494(W) x 154(H) x 456(D)mm 19-7116(W) x 6-1116(Hlx 17-15/16(D) in. Weight 12kg/261b fbz Accessories EP Adapter 1 Screwdriver 1 O v e r h a n g g a u g e . . . . . . . 1 Level . 1 C l e a n i n g c l o t h . . . . . . . . 1 Cartridge mounting parts (HET, HBT models only) Cartridgemountingscrews .6 Cartridgemountingnuts .2 Cartridgemountingwashers . 2 Cartridge PC-600 (S/G model onty) . 1 Operating instructions (French and German furnished on models for HET) 1 NOTE: Specif ications and design subject to possibte modif ication without natice, due to improvements. ftr, t T 2. PANEL FACILITI ES / t v Power switch ouartz lock indicator seeeo otsc slZE switch (!) R EPEAT switch (O ARM ELEVATION swi srnnr/sroP switch Remote operation knob e POWER SWTTCH Used to switch on and off the power to the turntable. Power is supplied when the switch is depressed (ON). The SPEED switch indicator (33) comes on. The power is switched off when the POWER switch is released. NOTES: r The platter doos not rotate when tho tonearm is positioned at the far right oven if the sl,lritch is depressed and the powgr supplied. . With each push, this switch alternates between the ON and OFF positions. . Keep the POWER switch at the OFF position when you are not using the turntable. euARTz LocK rNDrcAToR This indicator illuminates when the platter is revolving at the specif ied rate of 33-1/3 or 45 rpm. Dust cove. Arm rest Arm ctamp A- 19, I onearm NOTE: lf the platter speed varies, such as when the speed s:witch is changed from one position to another or when you press mo- mantarily on the platter, ths indicatorwill go off. As the platter ro/olution returns to the specified sped, the indicator will il- luminate again. sPEED swrrcH 33 . . . . . . Set the switch to this position when playing a 33-1/3 rpm record such as an LP. When it is depressed, the 33 indicator lights up, and the platter rotates at a speed of 33-1/3 rpm. 45 . . . . . . Set the switch to this position when playing a 45 rpm record like an EP. When it is de- pressed, the 45 indicator lights up, and the platter rotates at a speed of 45 rpm. I a t r)- V . a t Drsc srzE swrrcH Selects the switch that corresponds to the size of the rec- ord you want to hear for auto play operation. 1230 . . . For 30cm records 1025 . . . For 25cm records 717 . . . ForlTcmrecords o Used to select the record size when depressed. For in- stance, when the 30cm indicator lights up, depress the switch for the 25cm position, and depress it again for the 17cm position. Depressing the switch once more sets it to the 30cm position. o When the power switch is turned ON, the turntable will always be set for records with a diameter of 30cm and the corresponding light will come on. NOTE: This sruitch will not work if depressed when the tonearm is moving (auto lead-in, auto-return, auto cut). REPEAT swtrcH Press this switch for repeat play. When pressed the indi- cator will light up, and the record will be played again (refer to page 12 for further details on repeat play). Press this switch again to release it. The indicator will go off and the repeat play function will be released. NOTE: This slitch will not work if depressed wh6n the tonarm is moving (auto-return, auto cut). enru ELEVATIoN swtrcH Use this switch to interrupt play temporarily or to per- form manual play. When the DOWN position is depressed the tonearm will descend and when the UP position is depressed the tone- arm will rise. These two operations will be performed al- ternately every time the switch is pressed. NOTES: r When th POWER switch is set to ON, the tonearm will start in the UP position. r This switch will not work if depressed when th tonearm is moving (auto lead-in, auto-return. auto cutl. o When the switch is at UP, tho auto-return cancelling mecha- nisrn is actuated and so there will be no auto-roturn. O sranr/srop swtrcH Press this switch for auto play. The platter will start to ro- tate, the tonearm will automatically move over to the edge of the record and play will begin (auto lead-in). lf this switch is pressed during play, the tonearm will automatically return to the arm clamp position, the plat- ter will stop rotating and play will be suspended (auto cut). NOTE: This saritch will not work if depressed when the tonearm is moving (auto lead-in). PL-L1 Clclc REMoTE opERATtoN KNoB Used when moving the tonearm by remote control. Rotate counterclockwise to move the tonearm to the left. Rotate clockwise to move the tonearm to the right. NOTE: Whon the arm elevation switch is at DOWN or auto lead-in, auto cut and auto-return, the tonearm does not move even when the remote operation is released and th6 knob rotated. ToNEARM The tonearm function is to apply the correct tracking force to the cartridge. maintbin this value precisely and al- low the stylus to trace the record grooves accurately. The tonearm can be operated manually with your hand or remotely with the remote operation knob. lt is coupled to the motor switch and when it moves across to the record, the platter rotates and it stops when the tonearm is re- turned to the arm clamp position. NOTE: When the POWER switch is at OFF, the tonarm cannot be moved by either manual or remote operation. lf it is forced at tho OFF position, this may result in damage so always re- member to set the POWER switch to ON when moving it. ARM cLAMp Used to secure the tonearm. To secure the tonearm, move it to the right and then push down on the clamp. When you do not intend to use the turntable, secure the tonearm in this way. The tonearm is released when the clamp is raised. anru REsr This secures the tonearm pipe. When playing a record, rotate the arm rest counterclockwise and release the clamp. When not playing a record, set the arm elevation switch to UP ( ! ) and then rotate the arm rest clockwise and secure the pipe. NOTE: When the arm elevation sritch is at DOWN (l l, ttre tonearm pipe cannot be secured. Make sure this sl,tritch is set to tho UP ( ! l position. pIRIIER/RUBBER pLATTER MAT When the tonearm is moved and power is supplied to the turntable, the platter will start rotating at the set rotation speed. The rubber platter mat stabilizes the records and also absorbs external vibration, ousr covER Keep this closed unless operating the controls or tonearm, or changing records. This serves to keep dust off of the re- cords during record play. When fully opened and pulled straight up, this dust cover can be removed from the cabinet. n n t, I 3. DISASSEMBLY 3.1 PANEL 1. Remove the 4 insulator mounting screws. 2. Remove the top cover. 3. Shift the tonearm across to the center- 4. Lift the panel up, and disconnect the B con_ nectors from the printed circuit board below. Top cover I ) Ei Fis. 3-1 a t 3.2 D.D MOTOR 1. Remove the 3 D.D motor securing screws. 2. Disconnect the D.D motor connector. 3.3 TONEARM 1. Remove the plate pressing against the tone- arm output cable. 2. Remove the coil ? C d s I I I Tracking sensor, power supPlY. Tonearm drive I uoll l< l I I I I Manual drive i 1 D.D. motor control 2 Tonearm control 3 Arm drive control 4 Full auto logic 5 Arm elevation control 6 EV, REPEAT, SIZE selector input Photo 5-1 I BLOCK DIAGRAM OPERATIONS 5.1 TONEARM CONTROL STAGE a. Lead-in FF and Return FF Lead-in FF . . . . This FF is set by pressing the S/S (START/STOP) switch when the tonearm is on the arm rest, and is reset by a descend signal, or when the power switch is turned on. Return FF . . . . This FF is set by pressing the S/S switch when the tonearm is not on the arm rest, and also by the end detector. It is reset when the power is turned on, or by the descend signal, or when the tonearm returns to the arm rest. b. When either of the above 2 FFs has been ser, an AUTO on signal is generated (as well as AUTO on), resulting in the arm elevator being set to the UP position, and inhibition of manual drive. 5.2 END DETECTOR STAGE The end sensor input signal is rectified and then applied to the detector stage consisting of a dif- ferential circuit, integration circuit, and a mono- stable multivibrator. When the detector stage detects the arrival of 2 consecutive input signals within the fixed time constant period, an output signal is generated. This output, however, is inhibited by the EV Up signal when the arm elevator is in the Up position. OUTPUI EV up s qna Fig. 5_1 5.3 ARM ELEVATION CONTROL STAGE This stage consists of a J-K-type FF with a reset (clear) input and preset input. The arm elevator is raised (Up position) as a result of the initial resetting, or by the AUTO operation signal from the tonearm control stage. The eleyator descend again (DOWN position) when the FF is preset by the descend signal. Furthermore, whenever the EV switch is pressed, Q and Q are generated alternately, resulting in the arm elevator being raised and lowered correspond- ingly. The FF output is applied to a logical ,and circuit with the outputs from the elevator Up and DOWN switches, the resultant output being applied to the EV motor drive stage. s.iA SIZE SELECTOR STAGE This stage consists of a J-K FF 2-stage ring counter and the QUQ2 logical ,and, gate. As a result of the initial resetting, Ql = Q2 = L for auto- matic switching of the size selector to the B0cm position. Every time the size selector switch is pressed after that, the selector is switched from the 30 to 25 and 17 positions in turn, and then back to 30 again. Note, however, that switching is inhibited when AUTO operation signals are received from the tonearm control stage (i.e. during lead-in, return, and repeat operations). 5.5 REPEAT CONTROL STAGE Consisting of a T-type FF, e and Q are inverted by Repeat switch operation. Note that the FF is also turned off by the initial reset, and that there is no inversion while the tonearm control stage return FF remains set (i.e. during return and repeat operations). Furthermore. the FF is also turned off as a result of auto-cut operation during repeat mode. 5.6 LOWERING POSITION DETECTOR, PLUNGER CONTROL STAGE, AND DESCEND SIGNAL GENERATOR When the tonearm shutter passes between the sensors corresponding to the designated record size (sensors being mounted in positions corres- ponding to each record size), a lowering position detector output signal is generated. This signal is then applied to the plunger control stage (a mon- stable multivibrator), resulting in a fixed time constant pulse signal being generated to activate the plunger (during lead-in and repeat modes). The down stroke of the pulse signal is differentiat- ed and a descend position signal generated. Each of the tonearm control stage FFs is also cleared. 5.7 DISPLAY STAGE AND PLUNGER DRIVER This stage is responsible for the LED display of elevator position, repeat mode, and selected record size, in addition to plunger drive. 5.8 By motol sensol f,onea. opera is DC return 5.9 Thr CdS r voltag ment. the d to par the to EITOT sensor ./. 7 V 5.8 MANUAL DRIVE STAGE By amplifying the input to the power generator motor mounted in the locate stage, the tracking sensor stage balance is upset, permitting the tonearm to be moved back and forth. Such operation is inhibited, however, when the elevator is DOWN during auto operation modes (lead-in, retum, and repeat). 5.9 TRACKING SENSOR STAGE AND TONEARM DRIVER STAGE The tracking sensor stage (consisting of lamp, CdS element, and shutter) generates * and - voltage differ