Pioneer-PL44F-tt-sm电路图 维修手册.pdf
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1、()rrloruEER ORDER NO. ARP-139-O STEREO TURNTABLE PL.44F MODEL PL-44F COMES IN FOUR VERSIONS DISTINGUTSHED AS FOLLOWS: This is the service manual for model PL44F/KU. For servicing of the HE, HB and S types, please refer to the additional ssrvice manual on page 25. For the circuit NJM78r5a REGULATOR A
2、ssv 7.2 xwx-127 REGULATOR ! D 54 I I tl OI NOTE: :#:Hjinii FUNCTION Assy i I I CoNTROL Assy X wM - 133 A t2 vR I vR 2 vR 3 P C P - O 7 5 P C P - O 6 9 PCP - 067 D2 82-06i D 3 RD3.6EB D4,5,7 152473 a vR3 2t- B II PU coR0 D 6 t S r 8 8 5 Dt?,i3 VDt222 I C 3 B A 6 r O 9 I C 4 8 A 6 2 0 8 IC 5 PO2003 IC
3、 6 M884001 B Q r,4,5,7, I,tO,r1 2 S C t 8 r 5 Q2 25C945 Q 3 z S C l 9 5 9 Q9 2SCr815 R39 I t t5 /50 !- LOAOING I N s6 : oEcK SYNCHRO 57 : SPEEo |1r.u .o* l t3ro, .ro I ti .rruo.o* ll.ro, Iloro.- o., ,r, D 9 , t 1 GL- 9PR2 D r o GL.9NG12 vR 2 : SPEEo AOJ (33rpm ) vR3: SPEE0 AoJ(45rpo) PXM-il6 ARM MOT
4、OR ilo s8 U P PS H -OO4 I I L- pseocc 1- L-tb: _j PH I O l R L-tt-trr-:i s r - 5 P s G - 0 3 8 s 6 , 7 P S G - O 3 9 1. RESISTORS: lndicated in a,%W,/aW,t5% tolerance un16 otheMi$ M : M, (F) : : l%, (G) : x2%, lKl : 1 10% (Ml; t20% t, 2. CAPACITORS: Indicated in capacity (!F)/voltage V) unless otheM
5、is n Indication without voltage is 50V except elctrolytic 3. VOLTAGE I r DC voltage (V) at no input signal 4. OTHERS: : Adiusting point. The I mark found on some component pans indica portance of the $tety factor oI the part. Therefore, whel be sre to use pafts of identical designation. X marked cap
6、acitors and resistoF have parts numbe6, This is the basic shematic diagram, but the actual circui due to improvements in design. 270 LED AssyPHOTO S 6 : OECK SYNCHRO ON - OF F s 7 : SPEED 33/3 rpm - 45 rpm 5 8 : U P O N - O F F 5 9 ; RESET ON - OF F TRANSISTOR Assy (1/21 SI I : C L O SED O N - O F F
7、 SI 2 : O PEN O N - O F F Si 3 : M U T I N G O N - o F F st4 : PowER(STAND-BY) Onr-Orr The underlined indicates the switch position. MUTING AssyL clatnloeE m l CLOSE ON - OFF T STOP ON - OFF ELEVATION ON - OFF AT ON - OFF IAL ARM SET ON - OFF 4 65 - l I | ,. s CoNTROL I OPEN SW cLosED sw UP SW 4 RES
8、T SW 5 ARM CW 6 ARM CCW 7 LOAo CW I LOAo CCW 9 SYNCHRO to PHONO 12 EV UP LED tf, MANUAL t 4 GNO 2A x r t 25 O/C KEY 24 S/S KEY 23 EV KEY 2 2 REP KEY 2 l MAI KEY 2 0 SPEEO t 9 ENO IN t 8 otsK tN t 7 I N T _ t 6 RST t 5 REP LEO t - 1 2 | | l l s T iii I- T I I t7l NOTE: The indicated semiconductors ar
9、e repre*ntative ones only. Other alternative semiconductots may be used and are listed in the parts list. I8I External and lCs 2SC945 2SCl815 2SC1959 Appearance of Transistors l0N Assy NJUfrSll,l05A NJruTrSlSA 2*24F4 8A6109 8A6208 PD2003 PHlOl R M8840018 OPEN CLOSE l tSro*t ,ro f tiru .ruoo* llr.o,
10、I tionro. ou ,., D 9 , r 1 GL- 9PR2 D r o GL- 9NG12 OFF s6 : oEcx SYNCHRO 57 : SPEED E - - 5 P S G i , 7 P S G o 3 8 o 3 9 I 4W,15% lolerance unle$ otheruise noted k: ko, j) : r2%, K : i l0% (M); t20% tolerance (!F)/voltage (V) unless otherwise noted p I pF /oltage is 50V except elstrolytic capacito
11、r. i l at no input signal i on some component pans indicates the im- / tactor of the part. Theretore, when replacing, identical designation. s and resastoF have parts numbers. natic daagram, but the actual circuit may vary n desrqn. n / v tl ll D I87 #;.j, A ,rO*.S *ffi ililil B il!il - 9. ADJUSTMEN
12、TS 9.1 STYLUS LOWERING POSITION ADJUST. MENT 1. hess the OPEN/CLOSE key, pull the slide base out forwards, place a 30cm record on the tun- table platter, and set the correct Revolution by the speed selector. 2. Press the START key to start play. Check the direction and degree of stylus displacement
13、at this time. (Estimate the approximate distance in mm that the stylus lands from the lead-in gtoove). 3. Depending on the direction and degree of dis- placement, adjust the adjustment screw indicat- ed in Fig. 9.1with a small screwdriver. * TUm the screw clockwise (as seen fromabove) if the stylus
14、lowers outside the lead-in gfoove. * Trrn the screw counter clockwise (as seen from above) if the stylus lowers inside the lead-in gloove. * One half-tum of the screw corresponds to a shift of about 9mm in the lowering position. 4. When using the PLS-2001S test record, adjust the screw to obtain a c
15、ount in the 305 to 317 range for lowering onto a 30cm record. And if the GGF-021 test record is used, adjust to a count between 6 and 30 for a 30cm record. Nofes. * Remornl of the bonnet simplifbs adjustment oper- ations. In thb case, djuetmentE can be performed from the top of the eecutcleon couer.
16、 * Do not hcline the turntable ouer too far, not apply excesiue prcesuve to the adjustment acrew during the ad,j tst me nt op eratio n. 9.2 END DETECTOR ADJUSTMENT 1. Remove the bonnet, svyitch the power on, press the OPEN/CLOSE key, and pull the slide base out forwards. 2. Press the MANUAL key to p
17、ut the turntable into manud play mode, and then switch the power off. 3. Disconnect the CN2 and CN4 connectors on the common circuit board, and connect a DC volt- meter to pin l ard pin 3 (GND) of TP1. 4. Switch the power back on, move the stylus to a position 47.5mm from the center spindle, and rea
18、d the voltage. 5. Then move the stylus to a position 57.5mm away from the center spindle and read the meter again. The difference between the two voltage readings should be 5.6V t 0.2V. Adjust VRl to obtain this difference. Adjustment hole (in the base plate) Fig. 9.1 Stylus Lowering Position Adjust
19、ment Fig. 9.3 End Detector Adjustment 2 Screwdriver Center spindle Fig. 9.2 End detector Adjustment 1 fl -l- g flrti fl .Ufl 1 1A Fig. 9.4 Adiustment Position 6. The voltage difference is decreased by ttuning VR1 clockwise, and increased byturning counter clockwise (see Fig. 9.4). Note: Shade the se
20、nsor section from erternal light during this adjustment. 9.3 PHONO MOTOR SPEED ADJUSTMENT 1. Remove the bonnet and switch the power on. Place a stroboscope on the turntable platter, and press the MANUAL key to put the ttun- table into manual play mode. 2. Switch the speed selector to 33-1/3rpm, and
21、adjust VR2 to obtain the stationaxy strobo effect. 3. Then switch the speed selector to 45rpm, and adjwt VR3 to again obtain the ,stationary, strobo effect. 4. Turntable speed is increased by turning the adjustment controls (VR2 and VR3) clockwise, and decreased by turning counter clockwise. 9.4 STY
22、LUS HEIGHT ADJUSTMENT 1. Remove the bonnet, switch the power on, press the OPEN/CLOSE key, and pull the slide base out forwards. 2.Place a record on the turntable platter, and press the MANUAL key to move the tonearm forwards. 3. While holding the tonearm in the left hand, adjust the adjustment scre
23、w with a wrench (1.5mm) passd through the adjustment hole as shown in Fig. 9.6. 4. Adjust the stylus to a height 5 to gmm above the reeord. Fig. 9.5 Phono Motor Speed Adjustment Wrench (1.Smml Tonearm Height adjustrnent screw fl rill U flru fl Ufl vnzffg ypj VRl B - b Fig. 9.6 Stylus Height Adjustme
24、nt _i 19 9. REGLAGE 9.1 REGLAGE DE LEMPLACEMENT DABAISSEMENT DE LAIGUILLE. 1. Presser la ci6 OPEN/COLSE, tirer la base coulis- sante vers Iavant, mettre un disque de 30cm. sur le plateau et positionner le s6lecteur de vitesse sur le nombre Rdvolution correct. 2. Presser la ci6 START pour faire march
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