Pioneer-PL-L50-Service-Manual电路原理图.pdf

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1、CIRCUIT DESCRIPTIONS REPAIR :i I -QJ - _j_ - Ro,dsi 4E-detection Lead-in - Turntable Lead-in Arrival at 17cm Tonea, rpms begins lowering position down ( 17cm ) detection ARM I4 ARM 5 l C -.i Rest Arrival at rest 1 Approximately DOWN I Approximately i sec 1 0.5 sec Approximately 0.3 sec 0.5 sec I I I

2、 tracking ON I 33rpm set Turntable stops turning - - - - -l lf mnnr lflJ - - EV ON I ., . -D- - ., I IlfLf :llil ? - - - 1 t EV Cover open Cover close ON Record removed from turntable I ., - - - - - - - - - - -.-0- _, I d 16 6. DISASSEMBLY Dust cover assembly Rubber mat assembly Motor assembly Under

3、 base Fig. 6-1 17 6.1 UNIT DISASSEMBLY 1. Open the dust cover and remove the rubber sheet and turntable. 2. Close the dust cover and gently turn the unit over. Place the unit on something soft that wont scratch the dust cover. 3. Removing screw O releases the under base. 4. Removing screw f) release

4、s the motor assembly. 5. Removing screw releases the control board unit. 6. Removing screw 8 releases the SW board unit, and removing screw0releases the PU board unit. 7. To remove the dust cover, open it up and remove the plastic rivets labeled 0 . (The plastic rivets can be re moved easily by push

5、ing the pins from the inside of the dust cover.) 8. Removing screwfjwill release the mechanism base unit. Mechanism base board assembly 6.2 CARRIAGE REMOVAL 1. Remove the fixer from the carriage and the wire from the pulley. (See Figure 6.2) 2. Remove screw fl)and pull the guide bar away from the ca

6、rriage in the direction indicated by the arrow. The carriage and tonearm assembly can now be removed. 3. Removing the spring will release the carriage board as sembly, and removing screw 0 will release the mech anism base board assembly. Wire Fixer Pulley Fig. 6-2 Removing Carriage Wire Carriage boa

7、rd assembly Fig. 6-3 Carriage Removal 18 6.3 REPLACING THE CARRIAGE WIRE After assembling the carriage and tonearm assemblies in the opposite order of the previous section, replace the carriage wire according to the following steps. 1. Adjust the length of the wire unit as shown in figure 6-4 2. Att

8、ach the wire unit grommet to the spring of the worm wheel as shown in figure 6-4 . Then wind the wire onto the worm wheel taking care not to let it get caught in the worm wheel groove. Also be careful not to let the wire overlap. 3. Holding both the wire and the worm wheel, connect the wire to the w

9、ire guard and attach the worm wheel to the mechanism base. 4. As shown in figure 6-4 , put the wire around the pulley, and push the fixer into the carriage until it locks with a click. Take care not to let the wire overlap Wire unit Grommet-F t=:j i- :380mm 1 OOmml Wire guide Fig. 6-4 Wire Replaceme

10、nt 6.4 LEAD LINE DISPOSAL 1. Slide carriage to the left as far as it will go. 2. Insert enough lead line to reach from the clamp to the motor holder. (Indicated by arrows) Insert the thickest line last. 3. Move the carr-iage to the left and right, and check to make sure that the lead lines dont hit

11、the carriage. Guide bar Lead line Clamp Fig. 6-5 Lead Line Disposal 19 7. PARTS LOCATIONS NOTES: Front Panel View * Dust cover assembly _ _,_- PX B-394 Panel (F)- PNY-304 Rear Panel View * Hinge assembly- PXB-395 The 9 DO 06 07 3 LJ 108011 ,Aeae1 IMM7P :o I !ILHffMCSH LHHVCIH Q9 4 QS Q3 I5 I6 MECHAN

12、ISM BASE BOARD ASSEMBLY (PWX-083) 0 NO NC (ON) (OFF) 59 : ARM REST SWITCH PSH-007 REST POSITION : ON NO REST POSITION : OFF QI Q2 Tr BOARD(B) UNIT Q7 Q6 CONTROL BOARD UNIT(XWM- 174) I 4 I 5 I 6 I7 I8 MOTOR BOARD UNIT (PXM- I 46) Tr BOARD(A) UNIT (rEIJ (OFF) 0 NC NO (ON) SB : OPEN/CLOSE SWITCH PSG-05

13、3 COVER CLOSE : ON COVER OPEN : OFF 7 57 POWER POWER TRANSFOMER ASSEMBLY PTX-050 ,- -1 RED WHT _ R_E_D-r1 - CJ ,-+-+-6._0Hz L _ J I_ SW BOARD UNIT (XWS-032) POWER CORD ASSEMBLY PDE-221 8 I9 L A B c D 9 I A B c 1 I2 I3 11. SCHEMATIC DIAGRAM SOLENOID ASSEMBLY PXB-392 BRN l l.RED -,.; I wJ 1111 Lo AC 1

14、20V 60Hz POWER CORO ASSEMBLY - PDE22J SW BOARD UNIT XWS-032 CNI lit7S=IT-;-, r:, PSA-008 I - :11 I - I Cl o.- L _ G I -DJ 2 I Tr BOARD ( A) UNIT jRE;U:;-1 I I I EO;I I i ,o C7 3.3/50 D 05 - Rl2 180 + RI l . I r :;:j R201 CN4 190 IT L I I r TRKG IJP201 c PCP-083 ,:,.BLK I ,p 20, I IRED I I RI DRIVER

15、I I IF/R DRIVER I I MOTOR I I I I PU LEAD Vcc2 VNI R7 3.311 I I LINE 9 JC II 12 13 . 15 JI I :POA- 0 26 I I A14 3.3k I I I I :-:.,.Y I 17cm l I 1-1 i C301 I O OI R301 I 22 C302 2 0.01 BLU 2 ARM MOVEMENT STATUS _fU1_ I GRN R303 0301 390 r.-,.-(30cm) R302 470 I r 301 I i- I Q301 ADORES SENSOR JP303 _J

16、 Q301 GP-1A01 I0301.:o:v_c_3_H _ _ MECHANISM BASE BOARD ASSEMBLY PWX-OB3 2 I 3 4 I CONTROL BOARD UNIT XWM-174 - Qt PD6033 Q2 BA 625 t Q3 M54547P Q6.7 2SA933 QB,9 2SC1740 SYSTEM CONTROL rITIL- I I rH: c:i f .,.: T MF1033s I JFFER AMP I 2 3 4 E Xtol Xtcar RESET ARM t ARM H I QS,9: SIZE DETECTOR 10/25

17、Ph Tr BOARD UNIT 6 I 1. RESISTORS: Indicated in n, %W, YeW,:t5% to M: M mA: DC current at no input Si! 4. OTHERS: ; Signal route. : Adjusting point. The BUFFER R23 22k tOOk C24 10/16 _ J I 8 I9 External Appearance of Transistors and I Cs 2SA933LN 2SC1740LN Suffix hFE Lot No fTypeNo c 8 Type No hFE 2

18、SA933S 2SC1740S EC BA6251 M54547P NJM7812A NJM78M05A Type No ING OUT PA2017 13 8 Lot No I PD6033 PH101-R EE-SJ3-B ftr C E GP-1A01 S(Vcc) 4( Vo) 9 A - E - c - 31 r 12. ELECTRICAL PARTS LIST Miscellaneous Parts NOTES: When ordering resistors, first convert resistance values into code form as shown in

19、the following examples. Ex. 1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and K=10%). 560n 56 x 1 O 561 . . . . . RDPS ID6)1 J 47kn 47 x IO 473 . . RDPS 2.IGll J 0.5n ORS . . . . . . . . . . . . . . . . . .RN2H J2!1ll!ID K 1 n

20、010 . . . . . . . . . . . . . . . . . . RSJP J211JQ) K Ex. 2 When there are 3 effective digits (such as in high precision metal film resistors). 5.62kn 562 x 10 5621 . . . . RNSR !IDIDC2111J F The 6 mark found on some component parts indicates the importance of the safety factor of the part. Therefo

21、re, when replacing, be sure to use parts of identical designation. For your Parts Stock Control, the fast moving items are indicated with the marks * * and * . * GENERALLY MOVES FASTER THAN * This classification shall be adjusted by each distributor because it depends on model number, temperature, h

22、umidity, etc: COIL Mark S _ y_m_bo_ l_ le fonocaptor descanse a la izquierda de la ranura de descanso, (cuando la cuenta es mayor que la tolerancia de cuenta estandar). girar el tornillo O de ajuste en el sentido a las punteros del reloj. Cuando se este usando el disco de prueba, la posici6n quedara

23、 fijada para discos de 30 cm. Disco de prueba Posicion de ajuste PLS2001 310 3 cuentas PLS4001 13 6 cuentas Fig. 13-1 Ajuste del brazo fonocaptor 38 13.2 AJUSTE DE GANANCIA DEL SENSOR DE SEGUIMIENTO Y DE DESCENTRADO Ajuste de Ganancia 1. Sacar la cubierta para el polvo y la cubierta del panel. 2. Co

24、nectar un voltimetro de C.C. al pasador No. 4 (GND) y al pasador No. 5 (TRKG) del CN5. 3. Girar el tornillo8en el sentido contrario a las puntero.s del reloj y tirar la unidad de carro hacia adelante. 4. Encender el aparato y mientras se empuja el brazo de fonocaptor hacia el centro (coma se muestra

25、 en la ilus traci6n) ajustar el VR201 (TRKG) hasta que el volti metro de C.C. registre 3V 0, 1 V. Ajuste de Descentrado 5. Haga volver el brazo de fonocaptor a la posici6n de des canso. (Volvera par sf mismo cuando usted lo libere.) 6. Para ajustarlo, girar el tornillo8en el sentido de las pun teros

26、 del reloj hasta que el voltimetro de C.C. registre 1,1V0,1V. ZJ Fig. 13-2 Ganacia del sensor de segu im iento y ajuste de descentrado 13.3 AJUSTE DE LA ALTURA DEL BRAZO DE FONOCAPTOR 1. Con la cubierta para el polvo desmontada, insertar dos chavetas de 6mm (una derecha y una a la izquierda) para em

27、ular la situaci6n en que la cubierta para el polvo y la base del mecanismo estan conectadas. 2. Poner un disco de 30 cm sabre el plate giratorio, encen der el aparato, y usando el conmutador de local izaci6n ( .,.,. ) mover el braze de fonocaptor a una distancia de aproximadamente 100 mm del centre

28、del plate giratorio. 3. Girar el tornillot)hasta que la punta de la aguja este de 5 a 7 mm sabre la superficie del disco. Girando el tornillo en el sentido de los punteros del reloj, se baja la aguja. Girando el tornillo en el sentido contrario a los punte ros del reloj, se sube la aguja. local izac

29、i6n . C, Chavetas de 6mm Fig. 13-3 Ajuste de la altura del braze de fonocaptor 13.4 AJUSTE DELA VELOCIDAD DEL MOTOR DEL TOCADISCOS 1. Colocar la hoja de estroboscopia sabre el platillo. Encen der el conmutador de alimentaci6n y el conmutador de colocaci6n (.,.,. ) para girar el motor del tocadiscos.

30、 2. lnsertar un destornillador pequefio en el orificio de ajuste de velocidad situado el en panel inferior, y ajustar respectivamente V R 1 y V R2. Fig. 13-4 Ajuste de la velocidad del motor del tocadiscos 39 14. TROUBLESHOOTING 14.1 MAIN CHART phono motor is stationary. ( Start ) -r-1 - Set speed (

31、rpm) to AUTO and turn the power ON. Does the UP LED turn ON? YES Is the initial reset OK? NO Check JP1, JP2 and both terminals of C4 and C5 etc. Check the 12V and 5V lines NO 1-.i See 14.2 Doesnt perform initial reset. The tonearm returns to the rest and- - 40 YES Is the phone motor stationary? YES

32、Do the REP and other SWs function? YES Place a 17cm record on the turntable and.turn the S/S SW ON. NO Tonearm lowers in the 30cm area. Check the size sensor. Does the phone motor turn? YES Does the tone arm leave the rest? YES Does the tonearm go to the 17cm area? YES Does the EV DOWN function? YES

33、 Does the tonearm track? YES Does the phone motor switch to 45? YES Is there sound? YES Does auto return work? YES End NO NO The switches fail to work. NO See 14.3. The phone motor doesnt 1-.- turn (START/STOP). NO See 14.6 Tonearm movement NO The tonearm stays at the center of the record. NO See 14

34、.7 Elevation operation failure NO See 14.8 The tonearm doesnt track. The speed selector switch doesnt work. NO See 14.8 There isnt any sound. See 14.9 Checking the address sensor. - - 14.2 THE UNIT DOESNT PERFORM INITIAL RESET Unit doesnt perform ini tial reset. With the power ON Does the tonearm pr

35、oceed to the rest? Does the tonearm stop at YES Initial reset is complete the rest? (OK). NO NO Perform mismounting, pat tern and soldering checks on 05, C7 and R10 to 12. Is 01 pin 3 approximately 5V. Is 01 pin 27 L? NO Perform mismounting pat ,_._ tern and soldering checks from the rest SW (PSH-00

36、7) to JP303, 301, CN3 and 01 pin 27. YES YES Perform mismounting, pat tern and soldering checks on the ceramic lock. Is the oscillation waveform at 01 pin 1 and 2 visible on the oscilloscope? 3 MHz Are 01 pins 4 and 5 H? NO Perform patterns and mis ,_._ mounting checks from 01 pins 4 and 5 to 03 pin

37、s 4 and 5. OK YES YES Perform mismounting checks on L 1 and C6, and perform a 5V I ine check on the microcom puter. See 14. 6 The tonearm doesnt move. Are both pins 11 and 14 NO of 03 approximalety 11V? YES Perform mismounting and soldering checks on the area from 03 pins 4 and 5 to CN3, JP301, JP30

38、2 and the drive motor. Perform wiring and sol dering checks from the drive motor (PXM-137) to JP302, 301 and CN3. 14.3 THE PHONO MOTOR DOESNT TURN (START/STOP) The phono motor doesnt START. Using the locate switch, move the tonearm from the rest. Is the phono motor proper- ,- N _G _,., With the powe

39、r ly connected? reconnect it. OFF OK Is the phono motor sup plied with 12V and GND? YES ls01 pin 10L? YES ,_ _, Check JP7, and check the pattern of the power sup ply circuit 12V and GND. NO Check the patterns from t-01 pin 10 to 02 pin 2. Is JP7 pin 4 approximate- NO ly 0. 5V or more? Check the patt

40、erns from 02 pin 15 to JP7 pin 4. YES OK Check the phono motor The phono motor doesnt STOP. Push the SIS SW and move the tonearm back to the rest. Is 01 pin 10 H? YES Is JP7 pin 4 approximately 0. 1V? YES 41 14.4 THE SWITCHES FAIL TO WORK Faulty switch Check the patterns from the switches to the 01

41、switch input port. 14.5 TRACKING FAILURE 42 Unit fails to track. Place the tonearm on the record and begin playing. Is 01 pin 8 L? YES Is 03 pin 15 H? YES Are 03 pins 4 and 5 L? YES Raise the tonearm. Place the tonearm on the EV bar V groove. Is the voltage between the TP TRKG and G approximately 1.

42、0V? YES Does the TRKG outpu_t change when the tonearm is moved by hand? YES Perform pattern and mismounting checks in area of R13, 15 , 16, 17 and 03 pins 1, 2 and 3. The switches fail to work. NO With the power off, check whether the switches short out when pushed? YES NO Does the Microcomputer por

43、t of the pressed switch become L? NO YES Perfrom an LED check Symptom: There is sound while playing, but the stylus bounces because the tonearm fails to track (at that time, the tonearm is at an ex treme angle). Perform a pattern check from 01 pin 8 to 02 pin 5. Perfrom pattern and error checks from

44、 02 pin 12 to R6, and 03 pin 15. Perform a pattern check from O 1 pins 4 and 5 to 03 pins 4 and 5. Readjust the tracking sensor. NG Perform pattern and mismounting checks on the carriage base board, and check the connections from JP201 to CN2 pin 1. 14.6 TONEARM MOVEMENT Are the motor belt and drive

45、 wire properly attached? Faulty motor. OK Does the motor turn when the belt is removed? Check the parts i.e. worm gear, wheel, wire carriage. Check the pattern from the 0/C switch to JP5 and 01 pin 12. Does the UP LED fail to light? YES Check the patterns from O 1 pins 4 and 5 to 03 pins 4 and 5. Sw

46、itch failure. YES The tonearm fails to move. Is approximately 11V being applied to the both terminals of the drive motor? NO With CN3 removed, is the voltage YES between CN3 (male) pins and 2 approximately 11 V? NO Does the tonearm only move toward the center of the record? Check connections and sol

47、dering up to JP301, the mechanism base board, and the JP302 motor. Is 01 pin 27 H? NO i.-1 YES YES Are both 01 pins 4 and 5 H? NO YES Are they both L? NO NO Is one of the 03 pins 4 or 5 L and the other H? YES Check the patterns from 03 pins 11 and 14 to CN3 (male) pins 1 and 2. Check from 01 pin 27 to CN3 pin 4 JP301, the mechanism base, JP303, and the rest switch. 43 14.7 ELEVATION OPERATION FAILURE