Pioneer PL-200 Service Manual Download Page 19 | Manualshive

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Summary of Contents for PL-200

Page 1: ... 3clcIX PLI 4ocl FrL 4 clclx PICINEEFI E ECTFIONIC CCIFIFEIF ATICIN 4 1 Mesu o 1 chome rvesuno ku Tokyo 153 Jap6n lr g P q IEEF ELEST EINICB OGIPCFIATION 85 Oxfotu O ve Moonach e New Jereey O7O7A U S A PIChIEEFI ELECTFIO TIC Et FleEl N V Lurthagen Haven g 2OS AnEwerp Elelgrum PIO EEF ELECTFIONICB AIJATFaALIA FYY LTO 178 184 E ounda y Road Elnaesde VcEonra 3195 AusE 6l6 ART 467 0 r ocr i979 Printed...

Page 2: ...e 9 g MECHANTSM DESCR pTIONS 5 2 D D motorandtonearm 10 9 1 pL2ggmechanismoperating 22 6 PANEL AND BASE PLATE ASSEMBLY 8 2 pL 400 mechanicatoperation 24 6 1 PL 200 PL 300 11 9 ADJUSTMENT 6 2 PL 255 PL 400 12 9 1 Stylusdescentposition 28 7 CIRCUIT DESCRIPTIONS 9 2 Auto return adjustment 28 7 1 Block diagram PL 300 PL 400 13 9 3 D D motor adjustment PL 300 and 7 2 Motoroperation 14 PL 400 29 7 3 Ope...

Page 3: ... 33 1 3rpm records like LP s o spreo ADJUSTMENT KNOB Turn this knob when finely adjusting the speed of the platter The speed of platter will increase when the knob is turned clockwise in the direction of it will de crease when turned counterclockwise in the direction of 2 J Connect the ground lead with the Y shaped connector at the end to the ground terminal lnsert the power plug into the convehie...

Page 4: ...2 P1 255 PANEL FACILITIES ...

Page 5: ...3 1 3rpm Release for playing 33 1 3rpm records like LP s TOruEARM This tonearm is designed to apply the correct tracking force to the cartridge and to keep this force at the precise level for faithful tracking of the record grooves lt also has the job of switching the power on to the turntable a When the tonearm is moved from the arm rest to the platter the power comes on the strobe lamp lights up...

Page 6: ...3 PL 4OO PANEL FACILITIES ...

Page 7: ...rce at the precise level for faithful tracking of the record qrooves lt also has the job of switching the power on to the turntable a When the tonearm is moved from the arm rest to the platter the power comes on the strobe lamp lights up and the platter rotates a When the tonearm is returned to the arm rest the power to the turntable is cut off the strobe light goes off and the platter stops rotat...

Page 8: ... the power to the turntable is cut off SPCCO SELECTOR BUTTON 45 When this button is depressed the platter will rotate at 45rpm Depress for playing 45 rpm records singles or EP s 33 When this button is set to the released posi tion the platter will rotate at 33 1 3rpm Release for playing 33 1 3rpm records like LP s 2 3 Connect the ground lead with the Y shaped connector at the end to the ground ter...

Page 9: ...rm across to the center and raise the panel a little 3 Disconnect the D D motor and circuit board connectors 2 pin and 5 pin Size se lector Motor Ass y F loat spring red Power ass v G P t 1 rupply 2 pin connector l a s pin colnnecto Float spring red g U p 6 JK 7 q o JK t CI o g Float spring red o I Fiq 5 1 ...

Page 10: ...5 2 D D MoroR AND ToNEARM 1 After removing the panel undo the 3 screws O securing the motor 2 Undo the 4 screws O securing the arm base DD motor ass y Fis 5 2 4 t el C Tonearm ass y ...

Page 11: ...hat there are no other obstacles to normal operation of the mechanical parts 4 Shift springs A and B across to the left as shown in Fig 3 spring A being positioned to the left of spring B When the cut button is pressed spring A will snap back to the right hand side of spring B 5 Then cover the base plate completely by the panel move the tonearm across to the arm rest and clamp it into position 6 S...

Page 12: ...panel on the under base and return the tonearm to the arm rest and clamp it into position 7 Attach the insulators case float spring damper rubber and secure the panel to the under base Note that the front left hand corner float spring differs from the other 3 Refer to Fig 5 1 for correct mounting procedures 8 Switch the size selector to the 25cm position and release the arm lock 9 Rotate the motor...

Page 13: ...1 7 CIRCUIT DESCRIPTIONS 7 1 BLOCK DTAGRAM pL 300 pL 400 P42004 3nq I a ti PD100s vcc PA2005 STO ROBE vcc 13 ...

Page 14: ...he rotor while HB and HC are opposite an N pole and S pole respectively 3 If the power is then turned on the Hall element outputs will be as indicated in Fig 7 8 4 The Hall element outputs are applied to the position signal forming circuit PA200bA resulting in the switching of the current flow ing through the drive coils 5 These Hall element outputs are generated by the rotational action of the ro...

Page 15: ...tion patterns 2 The bottom surface of the rotor is magnetized with 200 magnetic poles and these rotate at a short distance above the speed detection plate 3 The output voltage from the detection patterns has a frequency of 55 5H2 at 33 1 3 rpm and of 7 Hz at 45 rpm 4 The signal is supplied to IC PA2004 zt Hg Fig 7 3 c z2 HB Fig 7 3 d ...

Page 16: ... Signals from the frequency generator in the motor rotation ass y are changed into 50 duty square wave signals by the waveform rectifier The frequencies at this stage are thus 33rpm 55 55H2 45rpm 75Hz 2 Part of the output is divided by Vz in the FF circuit and subsequently applied to the FV converter circuit along with the other part of the output formed in step 1 above thereby forming the FV conv...

Page 17: ...he Hall element position detection signals processed in the Reverse Rotation Prevention circuit 7 As long as the platter is rotating in the proper direction this pulse enters in the order B A C and no reverse command is generated 8 If however the platter rotates in the reverse direction the pulse order becomes A B C and a corrective command is given to the For ward Reverse Command Circuit FFr AND ...

Page 18: ...ed 4 Vcc will thus be applied across the Q2 coil La coil Le 2 Q6 route thereby pro ducing an S polarity in La and an N polarity in Ls 5 Once the magnetic field is generated the rotor will commence to rotate After the rotor turns through 15 the signals at position II in Fig 7 7b will be applied to terminals a b and c thereby resulting in a change in the flow routes of the drive currents After the r...

Page 19: ... d Fig 7 7 e 02 l Q3 e I _ tl f 4 1 l 1 Or ll o t ll a I F Fui o oo 1 O 15ru 1 Control input J I L I cNn 02 I J l Q3 r ff l o f rZ l o j O l5 CH 06 t C Control i nput Ql ILJ GNI vcc Qz Rv 1rffi Jlt r 4 I tr d6D I7 Ir lA 3 ll Kb t5 e tr A rboJ O t 15 ru ail 06 i ft Control input 1 I a GND VCC 82 l 03rc r ll l I t4 LaB l9 j l I lA 3 ll Hbi tK o bo O J5 L l Lc Control i nput f Itl Nt f br C Fig 7 7 t...

Page 20: ...E o q u f o f o Her HA Hez Hs X Hcr Hc Hcz L4 H41 Hg2 E L o q o 3 c LB HB1 Hs2 o o E o oLc HA2 Hc1 C o u o E E 3 o u c rH o Al F IH El 5 lH G Bl H o l u b IH u H EE For ward Rotation E A Reverse Rotation A B l Fis 7 8 b Fis 7 9 ...

Page 21: ...uch the same way as the DD mo tor in the PL 255 and PL 400 models See pp 14 20 for details z Vcc 9 T I SCHM ITT TB IGGE R BUFFEB AMPl REFERENCE VOLTAGE DR IVE R B EVE RSE ROTATION P REV ENTION POSITION S IGNAL FORMATION COMPARATOR FWD REW DIRECTION CONTROL UICK STOP TIMING VOLTAGE STABILIZE R B 16 5V t7 Vcc t5 2 1 ...

Page 22: ...ig 8 1 START OF PLAY 1 When the tonearm is moved across to the disc the PU plate located below in the arm base is also moved 2 Lever A is moved over by pin A connected to this PU plate resulting in lever B being un locked 3 At the same time that lever B is unlocked the microswitch is turned on power on and the motor commences to rotate Motor Gear A Microswitch Lever A Microswitch Fig 8 2 Fis 8 3 ...

Page 23: ...eby returning the tonearm back to the arm rest 5 At this stage plate B commences to return towards the center shaft guided by the groove in gear A 6 When the edge of plate B separates from lever C the arm elevation is lowered to drop the tone arm back into the arm rest 7 And at the same time that the tonearm is re turned to the arm rest pin A returns lever A back to the stationary state 8 Plate B ...

Page 24: ...6 When cam B rotates counter clockwise lever B is moved forwards by spring action in the direc tion of the arrow And while plate A is being moved across to the tonearm lever B is being pulled forwards to reach the state shown in Fig 4 The slider stops at the position selected by the size selector And although cam B con tinues to press against lever A excess stroke action by lever B at this time is...

Page 25: ...d play Pin E PU plate ptate C Pin A lever D Lever B Lever A Gear Detector assembly Lever A 12 Then when plate A returns further towards the center shaft cam B is rotated clockwise by the projection on plate A and lever A is returned towards the rear Lever A and cam B are thus returned to their original positions to permit the tonearm free movement 13 Furthermore plate C presses pin A on lever D ac...

Page 26: ...st cam D attached to the arm base resulting in the arm elevation being raised 5 Cam C pushes pin C of the PU plate across to the arm rest position Pin E also moves at the same time rotating lever E in the clockwise direction Lever E thus pushes lever C to the right 6 Just before plate A reaches the end of its move ment across towards the tonearm pin C of the PU plate is clasped by the lead in latc...

Page 27: ...t stay at the arm rest but proceeds to move back towards the record for repeated play Subsequent operations are the same as during normal autolead in operation INTERRUPTION OF RECORD PLAY 1 Press the START STOP button 2 Pin A of lever D pushes plate C to the right resulting in the plate C plate spring forcing lever A upwards And this in turn repels the detector assembly 3 Subsequent steps are the ...

Page 28: ...justing screw counter clockwise Each half turn of the adjusting screw moves the starbing point about 6mm NOTE Be uery careful not to damage the record and the stylus when you are adjusting the position of the stylus de scent Stylus descends outside the groove E_ 5 fou Stylus descends inside the groove 9 2 AUTO RETURN ADJUSTMENT 1 Turn the auto return adjustment screw full around clockwise 2 Move t...

Page 29: ...e as shown in Fig 9 3 5 Adjust VR1 for 33rpm speed and VR2 for 45rpm Fig 9 3 TPl 10v TP2 _ u Fig 9 4 9 4 D D MOTOR ADJUSTMENT PL 2OO AND PL 255 1 Turn the power on and start the turntable plat ter rotating 2 Turn the speed adjustment knob around to the mechanically center position 3 Adjust VR1 and VR2 in the control assembly so that the stroboscope appears to be stationary Again this adjustment is...

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