Pioneer CT-X50, Service Manual

Page 1: ...nly U S A model r E 22OYand24OV Switchablel Europe model H B 22OYand240V Switchabte U K model D 12OV 22OV and240V Switchabtel General export model D G 12OV 22OV and 24O Switchablel U S military model CONTENTS SPECIFICATIONS FRONTPANELFACILITIES DISASSEMBLY PARTSLOCATION CIRCUIT DESCRIPTIONS BLOCK DIAGRAM EXPLODED VlEWS ANDPARTS LIST 24 27 30 32 33 40 47 PfONEEFI ELECTFICINIC CC FIPCIFIATIEIN 4 1 v...

Page 2: ...ogic IC 8A843 for control of mechani cal drive by feather touch switch operations The 84843 pin layout is shown in Fig 5 1 and the input output i t t 1 Fû Sî6F FF MÊrio ru PA SE REc cNo Fig 5 1 Pinarrangement of 8A843 Power AssistMechanism Before describing circuit operations during each operational mode the basic principles of the power assistmechanism will be explained Gearreturnspring Flywheel ...

Page 3: ...he PLAY position And since the pinch pressure spring is also elevated the pinch roller is pressed against the capstan for start of play Flywheelassembly I Camgear Gearlever Lever Solenoidp assembly Fig 5 7 PLAY STOPmode Tape Transport Mode Switching Pins 1 2 3 and 5 of IC402 8A834 are the input pins for PLAY STOP FF and REW When any pin is switched to L level the tape deck is switched to the cones...

Page 4: ...nk sections of tape BECAMP D4æ D427 2 3 r L sroP 1 vs J pg1y lC4O2Pin 14 Pinch solenoid Head base MS solenoid FF solenoid 1C403Pin6 1C403 PinS Fig 5 10 MSoperation timingchart Auto StopCircuit This circuit is used to switch the mechanical drive conbol IC BA843 to stop modewhentape transport stops seeFig 5 11 A photo intemrpter is usedfor tapetransportdetection andthe rotary blade mechanism usedto ...

Page 5: ...raing signal shortingrelay RyB01 connecteato pin 6 When switching to recording mode frorn riop mode 9jl8 i charged up anâpin 6 switàhedfrom L ro n revel once the capacitorhas been chargedup ïVhile this C4Bg is being fr eàJ p approx 200ms the LINE OUTPU T i itua ôat is mut_ ing is cancelledafter a delay of abàut 200ms therebyeliminating switching tir Fis 5 14 Fig 5 15 Mutingat startof recording FiS...

Page 6: ...ll be adjusted by each distributor because it depends on model number temperature humidity etc Bonnet RNA 549 B REC RAC 21 5 f I nction knob RAC 2 3 KnobD DOLBYNR RAC l68 C RECMUTE RAC 216 KnobA PAUSE RAC 214 t t Push switch RSGO88 Function switch assembly Push switch RSG I14 Pincharm assembly R8H 760 l Strainretief REC 272 A Coro RDG O22 BDGO30 t Door assembly RX8 594 Power knob RAC 163 Knob C MU...

Page 7: ...etRemoved ll Connector assembly 4P BKP 356 Connector assembly2P Powertransformer 120V1 RTT 238 Capstan belt REB41 I Flywheel assembly RX8 358 r Mother assembly connector assembly 3P RKP 269 Connectorassembly3P RKP 27O trol assembly Fort sencerassembly I Timerswitchassembly ...

Page 8: ...playback head circuit is opened and the playback output shorting transistor Q101 is tumed on thereby switching the headto recording mode 3 With pin 10 of IC4O2and the playback output shorting transistor Q301 is turned on and the bias oscillator activated If a cassette half without the erasure preven_ tion tabs is loaded S10 is switched to the HOLE position resulting in pin g À R of IC4O2 being swi...

Page 9: ... enabling Q407 to be turned on fast forward standby mode by the Q419 inhibition circuit described later At the same time that pin 15 is switched to H level pin 14 0 FAST is also switched to H level rezulting in Q417 beingturned on Once Q417 is tumed on Q418 and Q419 will be tumed on for a period of time determined by the C425 P 44Otime constant And while the Q419 inhibition circuit is on the e40Z ...

Page 10: ...hed to H level Pin 3 is also switched to H level during stop mode due to B being applied to pin 2 C443 and C442 have been inserted in order to prevent misopera tion during mode switching use is made of the time constants of these capacitors during eachtype of mode switching 5 7 TIMING CHART MS MODE O PLAY O FAST O REC B Fig 5 17 Functionselector 5 6 AUTO TAPE SELECTOR Tape selection of normal chro...

Page 11: ... rl BIAS OSCILLATOR J Ë sg9 POWER SW ON OFF MUTING _ rl FUNCTION SELECTOR J FF or REW P L A Y REC P L A Y F F o r R E W 7EC P L A Y J O zy t 6 âà I NCH OLENOIE TAPE TRANS PORT J r lu tr LINEO UT MUTING I I t_ RECAMP MUTING BIAS OSCILLATOR l l AUTOSTART AUTO STOP P L A Y J T A N D B Y i È u STAND P L A Y REC P L A Y F F o r REW J atf F 1 U J u J v INC H SOLENOIE î_l î_I r TAPE TRANS PORT _f J L L t...

Page 12: ...o 7 EXPLODED VIEWS AND PARTSLIST 7 1 EXTERIOR t4 t5 a I i I I A B o I E C t3 D 3 2 25 4 o 1 lt I I laz I l i ...

Page 13: ... D M ff q I ...

Page 14: ...UIT S I P O W E R 5 2 3 P L A Y 5 2 5 R E W 5 3 4 F F O N_ O F F O N_ O F F O N_ O F F O N O F F 5 4 5 S T O P 5 6 P A U S E n c u 5 8 R E CM U T E O N O F F O N O F F O N_ O F F O N O F F AUTOSTOP S I O E S I I T S I 2 T t L t u z DOL B Y NR O R E C F É MUTI S W i â 1 13 1 osc ...

Page 15: ...2 SOLENOID DRIVE CIRCUIT MOTOR N B PREVENT O N O F F HOLE_NOHOLE O N O F F P L A Y R E C S t 3 M S O N o F F S l 4 T A P E S E L E C T O R N O B M C r O S t 5 T A P ES E L E C T O B C r O M E T A L ALCCIRCUIT MUTING I C 4 0 l 1 6 t 5 t 4 t 3 t 2 i l t o 9 I C 4 0 2 8 A 8 4 3 OR 1 E ...

Page 16: ...r cover Power switch Timer switch assembly Push switch Timer switch P C B Select knob A Select knob B S lect knob C Panel stay Function switch ass mblY LED holder A LED holder B L E D L E D Push switch Pushswitch RTT 238 RDGO22 RDGO3oI REC 272 REC 355 REC 369 RNL 223 RKP 269 RKNO7l RKBO18 Rcvo93 vcz30P060FMc PMZ3OPOSOFMC RBFO56 BMZ3OPO6OFMC vcz30Po80FMC PMZ3OPOSOFMC vBZ40PO60FMC vcz30P060FzK VBZ3O...

Page 17: ...999 r 70 RXB 360 a 71 RNLo59 72 RXB il1 73 RBH 744 74 RXMO76 75 76 77 78 79 RX8 358 r 80 REB411 81 RBH 721 82 RXPOgg 83 REB 241 84 85 Subheadbase REC PB head Headadjustspring Pincharmassembly Pinchpressure spring METAL detectorlever METAL detectspring PocketR PocketspringR Plunçr solenoidR Solenoidbracket Solenoid arm Brakespring Plunçr solenoidF Gearreturnspring Gearlever SolenoidbracketR Drivebe...

Page 18: ...r05 52 5 4 5 I I I a l 95 o a ...

Page 19: ...x 1 5 2 4 J Y 1 ï Â l ô I l oqtto 1 ô Q4 425 S L r 7 4 O L N R o r S B ffi rjtj jffii îi îhkE iî pi ifîç I TloolloL fls o eczz qzs ô s t 1 é Lr av nr Daz6 7 1 lY li r a 4 t 7 L a Rqro4 f q ç 406 r I 9 F 10 3 t p i2 r c D r o ler l ii J i Xl f L tC I o qRa r ôr o u 6 agtf D4 6 J rl to on iLt 1 æ ffi1r 47 ta ï rl r qT l11 T_ f irr o o o L l o o o o o o o ï À A r l l 1 1 Â j i f 1 É r C D I B 7 ...

Page 20: ...t assembly Slide switch Mounting plate Side arm R assembly Elect lever Stopper lever Stopper Washer Screw Screw Screw Screw Screw Washer SCREW 101 PMZ2OP13OFMC Screw 1O2 IMZ2OY12OFMC Screw 103 PMZ2OPI2OFMC Screw 104 YE2OFUC Washer 105 PMZ26P060FMC Screw 106 YS2OFBT Washer 1O7 WAl7D032D025 Washer 108 PMA26P040FMC Screw 109 WA21D040D025 Washer 110 RBF 051 Wahser 111 RBF 050 Oilstopwasher 112 PMA026P...

Page 21: ...1 ...

Page 22: ...R 52 5 ÈAY æ t 5 1 E W s3r4 F 9 5 sToP 56 PNSE 57 REC F C ilUE 5 9 i r u Y N R oN 9Ef d trF O O F F o otr O N 9 E ON OFF SlO EN æWNÎEEM HglE NO ff 5II TIMER ON GF SI2 TIMER PUY æC s l 3 i M s fr otr NOTE Playback signal route Recording signal route 25A1127 2SC2634 HO 432 2SC2060 Typc No 84336 25D837 HA1t226 HAl2006 Lot No 2SD103t M51202L Type No NOTE The indicated semiconductora are repreæntative ...

Page 23: ...Symbol Deccription rt RSG I 15 PhotoSenser Assembly Mark Part No sl 1 sl 3 Symbol Dæcription RESISTOR Mark Part No G P 4 1 1 B RDî 4PM1O2J DetectAssembly Mark Part No R601 Symbol Description A RDl 2PSF 561J SEMICONDUCTORS Mark Part No R501 R504 Symbol Description r RsH 059 RKP 356 Slide switch Connector assembly4P 11 PACKING Mark No Part No GL gPG4 r GL gPR4 LEDsOl LED5O5 LED5O6 LED5O7 Description...

Page 24: ......

Page 25: ...r r c 1 0 1 B M O T H E R A s s y Q 2 o 4 Q 1 o 3 o 1 o 4 Q 2 o 3 Q207 Q206 Q205 VR1O2 VR2O2 L 2 0 3 Ll03 LlO2 L2O2 VRJO3VR C Qro2 Q107 a r 0 5 v R 3 0 t v Rt o l D 3 2 1 t T 1 lJ l l t l l l iil î6S 3 ç VRza t 5 r x tt JTi l Czts i 0 0 P vRzca I50K 8 VRrû3 t50K B ...

Page 26: ...4q 9 46 2S 74N R or S d 2SC26tr Ror S 3 2 1 apr 2û 2SlÉot Ror Sd ææg R ors SWTCBrc REC ON rclor æl HAl2æ5 RÊC PB SYSEM C d 2sc26g Rors swrcarilG REC ON COtfrROL Ass y rc40t HAr2 6 MUTING B SWITCH rc M22 425 2SCl74OLN R6S t I I I L 25ÂæU orR or 2 llz Rd S ...

Page 27: ...lK34A or lK A o OA9O Q42e SCl74OLN R o s d zscæs RdS 6 5 4 æ3 iO7 æ3 2O7 2SCI74OLN R ù S d 2Sc2634 R or S ar03 r 2o3 2o4 SwlrcHlrc P B ON o 05 26 OUTPUT I l u R45o I o4oz 4oa 41o 2sc2m odR J O4O9 O4il Q4O9 O4il 2SCi74OLN RorS 6 zæ ru RdS d 2SC26Y RôrS 2SC2634 RdS a j r r r J T r M t À É 2SCt74OLN RorS d 2ææ34 R dS ...

Page 28: ...INPUT OUTPUT Pinjack Symbol Description R SG I 1 5 PhotoSenser Assembly Mark Pan No sl 1 S1 3 Symbol Dccription l RDl 2PSF561J SEMICONDUCTORS ll lark Part No R501 R504 Symbol Description G P 4 1 1 B RDl 4PM1O2J DetectAssembly Mark PartNo R601 S mbol Dercription 11 PACKING No Part No r GL gPG4 t GL gPR4 LEDsOl LED5O5 LED5O6 LED5O7 Doscription RSHOsg RKP 356 Slide switch Connector assembly4P 1 2 RHG...

Page 29: ... Y 52 5 reW ON OFF o trF s o f d gEE 9 5 sloP oN gfE 56 PAUSE 57 FEC REC MUE oN ffi O N 6 F 59 OCBY NR q gqE sro EN æwNrmcu HglE 9 E sfi T MER ON 9fE 5i2 TIMER PLAY _ æq s r 3 M S oN otr NOTE Playbach signal route _ Recording signal route Sl4 rffi SEÉCTG W C O2 Sl5 IPE SEÉCTæ ç 93 GTAL lhuùlid idic G rhe ild æ iton Thk is th bb æh6 i diqrh br r6a æùd ci n Êv v ry dù ro inÈdmnc in 6iS I 7 25A1127 2...

Page 30: ... ASSEMBLIES MotherAssembly CAPACITORS Mark Part No Symbol Description Mark Part No Symbol DescriPtion OTHERS Mark Part No Mother assembly Control assemblY Function switch assemblY Timer switch assemblY Photo sensorassembly Detect assemblY Symbol Description CKDYB 01 K 50 CEANL33OM 16 CEANL22OM16 CEAORlOM 50 CEAOR33M 50 CEAOR47M 50 cEA 010M50 CEA3R3M50 cEA 221M10 cEA 100M16 cEA 470M16 c E A 1 01 M1...

Page 31: ...efo olii tn i rewrite thepart no asbefore 2SC1 740LN 2SC26341 1K34A lK60A toA90 ts2473 wz o73 w2 044 Part No Part No Symbol DescriPtion a RCV 093 RSl 2PSF 561J R Sl P F13 1 J RD1 4PMtrtrDJ VR1 1 VRl 2 Variable 2Ok A R455 R485 R453 R4o1 R452 R454 R456 R484 Fr486 R496 I I colLs Mark SEMICONDUCTORS Symbol DeTniPtion Mark Part No Symbol Description RTX OIO RTF 085 RTF 84 RTD 083 RSR O35 ControlAssembl...

Page 32: ...dBv aa 6 mV 3 Record the 333H2 and 6 3kHz signalsonto the STD608A Play back the tape and adjust the VR103 L ch and VR 203 R ch so that the difference betweentwo is OdB_t b dB 4 As listed in the specilications in Fig 12 13 and check to see that performance meets specifications Fig 12 13 Recording Playback frequency response adjustment Frequency Response UsingSTD 331Awith DOLBY NR OFF Howeuer the ri...

Page 33: ...e la bande Raccorder le fréquencemètre aux bomes de sortie LINE OUTPLTI Reproduire la partie à SkHz de la bande d essai STD 301 Au début la fréquence doit sesituer dans la plage de 2995H2 à 3010H2 et elle peut être réglée en toumant la Ésistance ajustable située dans le trou de réglage du moteur cabestan comme indiqué àlaîig L2 2 La vitese de défilement la bande augmente lorsque la résis ance ajus...

Page 34: ...so that the AC mV meter reads 5 2dBv 0 iaV 2 Next set ttre DOLBy NR switch to the ON position 3 Record the BBBHzsignalonto the STD 60SA eUy _1c r the tape and adjusr rhe V8102 Lch and VR202 Rch so that the AC mV metei reads 5 2dBv 0 bV Record the 333H2 signal onto the STD 609 PIay back the tape and check that the AC mV meter reads 5 2dBv t1 5dB 650mV 460mV Record the 333H2 signal onto the STD 604 ...

Page 35: ...vel 10dBv and then confiim the AC mV meterreadsSdBv 1 4v 4 Disconnectthe jumper cords and confirm the AC mV meterreads 2dBv J1 5dB 12 2 8Auto PlaYMovement Check Connect a tester actoss the function output jack and ground with the tester set to resistance range andmakesurethat Resistance is 100o or lessat PLAY FF REW operations o Resistance is sufficiently high 1 Mo or more at STOPoPeration 333H2 o...

Page 36: ...ecla bossede I assemblagedu brasd entraîne ment c est àdire avec un êcart zérol comme indiqué sur la Fig 12 5 Système de base ensembledu brasd entrainement Séparation 0 Contre cabestan Support de bobine dérouleuse Mode de rebobinaç REW Contre abestan Supportdebobinedérouleuse SolénoldeFF avancerapidel Position d avance rapide FF Séparation O Support de bobine débitrice Contrecabestan lMod d u n ra...

Page 37: ...0 3O c 3O c lo3 c lO c 603 lo ac 3O c Fig 12 Contenu de la banded essaiSTD 331A Niwau dBl 12 2 1 Réglage du circuit DOLBY NR Préparation Mode Enregistrement Millivoltmètre CA TPl canal de gauche L et TP2 canal de droit R de I assem blage principal Signald entrée 2kHz LOdBv 316mV à I entrée de ligno LINE INPUT Proédure 1 Régler la commande de niveaud entrée INPUT de manière à ce que le millivoltmèt...

Page 38: ... Y 52 5 reW ON OFF o trF s o f d gEE 9 5 sloP oN gfE 56 PAUSE 57 FEC REC MUE oN ffi O N 6 F 59 OCBY NR q gqE sro EN æwNrmcu HglE 9 E sfi T MER ON 9fE 5i2 TIMER PLAY _ æq s r 3 M S oN otr NOTE Playbach signal route _ Recording signal route Sl4 rffi SEÉCTG W C O2 Sl5 IPE SEÉCTæ ç 93 GTAL lhuùlid idic G rhe ild æ iton Thk is th bb æh6 i diqrh br r6a æùd ci n Êv v ry dù ro inÈdmnc in 6iS I 7 25A1127 2...

Page 39: ... ASSEMBLIES MotherAssembly CAPACITORS Mark Part No Symbol Description Mark Part No Symbol DescriPtion OTHERS Mark Part No Mother assembly Control assemblY Function switch assemblY Timer switch assemblY Photo sensorassembly Detect assemblY Symbol Description CKDYB 01 K 50 CEANL33OM 16 CEANL22OM16 CEAORlOM 50 CEAOR33M 50 CEAOR47M 50 cEA 010M50 CEA3R3M50 cEA 221M10 cEA 100M16 cEA 470M16 c E A 1 01 M1...

Page 40: ...efo olii tn i rewrite thepart no asbefore 2SC1 740LN 2SC26341 1K34A lK60A toA90 ts2473 wz o73 w2 044 Part No Part No Symbol DescriPtion a RCV 093 RSl 2PSF 561J R Sl P F13 1 J RD1 4PMtrtrDJ VR1 1 VRl 2 Variable 2Ok A R455 R485 R453 R4o1 R452 R454 R456 R484 Fr486 R496 I I colLs Mark SEMICONDUCTORS Symbol DeTniPtion Mark Part No Symbol Description RTX OIO RTF 085 RTF 84 RTD 083 RSR O35 ControlAssembl...

Page 41: ...dBv aa 6 mV 3 Record the 333H2 and 6 3kHz signalsonto the STD608A Play back the tape and adjust the VR103 L ch and VR 203 R ch so that the difference betweentwo is OdB_t b dB 4 As listed in the specilications in Fig 12 13 and check to see that performance meets specifications Fig 12 13 Recording Playback frequency response adjustment Frequency Response UsingSTD 331Awith DOLBY NR OFF Howeuer the ri...

Page 42: ...e la bande Raccorder le fréquencemètre aux bomes de sortie LINE OUTPLTI Reproduire la partie à SkHz de la bande d essai STD 301 Au début la fréquence doit sesituer dans la plage de 2995H2 à 3010H2 et elle peut être réglée en toumant la Ésistance ajustable située dans le trou de réglage du moteur cabestan comme indiqué àlaîig L2 2 La vitese de défilement la bande augmente lorsque la résis ance ajus...

Page 43: ...so that the AC mV meter reads 5 2dBv 0 iaV 2 Next set ttre DOLBy NR switch to the ON position 3 Record the BBBHzsignalonto the STD 60SA eUy _1c r the tape and adjusr rhe V8102 Lch and VR202 Rch so that the AC mV metei reads 5 2dBv 0 bV Record the 333H2 signal onto the STD 609 PIay back the tape and check that the AC mV meter reads 5 2dBv t1 5dB 650mV 460mV Record the 333H2 signal onto the STD 604 ...

Page 44: ...vel 10dBv and then confiim the AC mV meterreadsSdBv 1 4v 4 Disconnectthe jumper cords and confirm the AC mV meterreads 2dBv J1 5dB 12 2 8Auto PlaYMovement Check Connect a tester actoss the function output jack and ground with the tester set to resistance range andmakesurethat Resistance is 100o or lessat PLAY FF REW operations o Resistance is sufficiently high 1 Mo or more at STOPoPeration 333H2 o...

Page 45: ...ecla bossede I assemblagedu brasd entraîne ment c est àdire avec un êcart zérol comme indiqué sur la Fig 12 5 Système de base ensembledu brasd entrainement Séparation 0 Contre cabestan Support de bobine dérouleuse Mode de rebobinaç REW Contre abestan Supportdebobinedérouleuse SolénoldeFF avancerapidel Position d avance rapide FF Séparation O Support de bobine débitrice Contrecabestan lMod d u n ra...

Page 46: ...0 3O c 3O c lo3 c lO c 603 lo ac 3O c Fig 12 Contenu de la banded essaiSTD 331A Niwau dBl 12 2 1 Réglage du circuit DOLBY NR Préparation Mode Enregistrement Millivoltmètre CA TPl canal de gauche L et TP2 canal de droit R de I assem blage principal Signald entrée 2kHz LOdBv 316mV à I entrée de ligno LINE INPUT Proédure 1 Régler la commande de niveaud entrée INPUT de manière à ce que le millivoltmèt...

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