Pioneer CT-110 Service Manual Download Page 16 | Manualshive

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Summary of Contents for CT-110

Page 1: ... 5 DISASSEI 4BLY 6 PARTS LOCATION 7 EXPLODED VIEWS ANDPARTS LIST PIClNEEFI ELEciTFIc NIC CClFIFc FATIclN FIoNEEFTELECTFONTC UAAI tNC r9e5E OomnsuezSr L PToNEEF ELEcTFoNtc EUFolPEI N v FIONEEE ELECTEIONIC to the ZE type au modede r6glage enfrangais metododeaiusteesclitoenespafrol 2 3 1 0 1 2 l 3 l t 12 2 l 23 24 27 30 8 E L E C T B I C A L P A R T S L I S T 9 PACKING 0 P C BOABDSCONNECTION DIAGFAIV...

Page 2: ...b m magneticlevel Phillips cassette reference level 3 Reference Signal 333H2 4 Wow Flutter JIS 3kHz with acousticcom pensation weighted rms value DIN 3 150H2 with acousticcompensation weighted PEAK valuel DIN 45507 5 Frequency Response a Measuredat 20d8 level DOLBY NR OF level deviationis 16dB without indication 6 Signalto NoiseRatio o Measured at the third harmo nic distortion 3 level weighted Dl...

Page 3: ...ard at hiqh speed from left to right I STOPI Push this switch to stop the tape travellingand to release the function switches tl Pausef Push this switch to stop the tape temporarily during recording or playback Releaseit to allow the tape to resumetraveling The tape does not stop during fast forward or re wind operationseven when tne ll nause switch aspushed reee sELEcroR swtrcHEs Theseselectorsal...

Page 4: ...level of this output is adjusted by variable resistor Then after equaliza tion in the REC AMP Q106 in accordance to the type of tape being used the signal is passed to the recording head g 3 3 CONTROL CIRCUIT The control circuit in this deck utilizes a one chip IC PM90028 which enables feather touch operations In addition to mechanism control this IC also includes auto stop function And due to the...

Page 5: ...te status to permit recording to start 4 Fast Forward Mode When the FF button is pressed IC102 pin 8 F F is changed to L level followed by pin 26 FF SOL being changedto H level 416ms later Q304 is thus turned on activating the FF solenoid to start fast forward operation 5 Rewind Mode When the REW button is pressed IC102 pin REW is changedto L level followed by pin 25 REW SOL being changedto H leve...

Page 6: ...ged up and dischargedrepeated ly The potential at pin 17 is thus kept below the threshold voltage and prevents activation of the auto stop mechanism When tape travel stops and the take up reel stops turning the photo interrupter output is no longer applied to pin 16 and the potential on the ca pacitor connected to pin L7 CgLz continues to increase until it exceeds the threshold voltage The IC is t...

Page 7: ... playback and eraseheads are mounted on the head base o StopMode see Fig 3 6 The head base shift mechanism during stop mode is shown in Fig 3 6 Operating lever A presses down towards cam C due to operating lever spring B With cam C combined with cam gear D clockwise torque is applied to this cam gear Solenoid P is inactive and the hook of gear lever F is kept against stopper G of cam gear D by the...

Page 8: ...cam C thereby tending to continue the rotationary motion of cam gear D but since stopper G catches the arm of gear lever F E cam gezr D stops rotating and operating lever A becomes stationary playback mode B Fig 3 9 STOP PLAYoPeration 3 o Operation of Different Parts As can be seen in Fig 3 9 the head basedrive pin of operating lever A rises during playback mode This pin forces the head base up th...

Page 9: ...m engagesthe idler gear resulting in rotation of the TU reel baseas shown in Fig 3 12 the drive gear being belt driven by the capstan motor At the same time the pin on the branch of the drive arm pushes the brake plate up thereby releasing the reel brake Brakeshoe Drivegear TU reelbase Brakeplate Drivearm Drivearm bracketpin Rewind Operation When solenoid R is activated see Fig 3 18 the drive arm ...

Page 10: ...4 BLOCK DIAGRAM MIC AMPLIFIER E Q U A L I Z E RA M P L I F I E R t _ 25 dB _____ l CONTROL C I R C U I T REC PBHEAD E R A S EH E A D ...

Page 11: ...O R L I N E M I C TAPE SELECTOR I IOR U II IEN T A P E S E L E C T O R C r O a M E T A L O N O F F O N O F F O N O F F o N o F F O N O F F oN _qir O N O F F E R A S E P R E V E N T D E T E C T O R H O L E N OH O L E The underlined indicatesthe switch position B t i l 7 v 8 2 1 2 3 v 8 3 r 2 3 V 8 4 5 V R E C A M P L I F I E R METERCIRCU IT I t c r o z HIGHI I METAL h 6 ql l ffinu c o s30r 3 s30t 7...

Page 12: ...5 DISASSEMBLY Counter belt Volume knob assemblyS Volume knob panel Eiectknob N N Door assembly t 1 ...

Page 13: ...The mechanical assemblyis removed by undoing screws and then sliding it to the rear WARNING When assembling first attach the f ront panel assembly then attach the disphy assembly At this time be sure to connect the ground lead to the front panel 6 PARTS LOCATION FrontPanel View NOTES c Parts without part number cannot be supplied o The mark found on some component parts indicates the importance of...

Page 14: ...er switch R5A 062 Motor assembly RXM 076 Plungersolenoid R RXP 127 RXP I31 Plungersolenoid F BXP 126 RXP 130 RearPanel View Terminal LINE RKB 018 Main assembly RWX 637 Terminal LlNEl RKB 018 LBY NR assembly RWX 638 t Pushswitch assembly RSG 139 Volume assembly Sensingassembly Counter belt RE846g 1 4 ...

Page 15: ...7 EXPLODEDVIEWS AND PARTS LIST l h t 8 D v sg ...

Page 16: ...l 2 S l 5 o l l 58 B 4w 42 A tr s l I rfu 5rB 58 d I 59 w b fi l 1 v c ...

Page 17: ... 18 37 38 RKP 629 39 RKP630 40 RKP628 Bonnet Eject spring Eject knob Front panel assembly Door assembly Knob cap A Knob cap B Knob cap C Function panel Volume knob assembly Volume panel Cassetteplate Mechanismassembly Sensingassembly Photo interruptor Counter holder Counter belt Counter P C B holder Volume assembly Variable resistor 20k Meter panel Indicator assembly LED holder L E D L E D Pushswi...

Page 18: ...7 5 frN lr I u A 65 S ss l 28 1 8 T K r 77 I W ...

Page 19: ... so q6 N 6e xo N 1 6ef TA Bt4 p9 Ui so 32 t t 48 f_65 il35 b T K f I 77 at 1 9 ...

Page 20: ...6P1OOFMC Screw 69 VCZ26P06OFMC Screw 70 YE4OFUC Washer 21 RX B 716 Metal holder assembly 71 R BFO5O Oil stop washer 22 RBH 794 HB drive spring 72 PMZ2OP1 50FMC Screw 23 Connector assembly 2P 73 MZ20Y1 50FMC Screw 2q RPB G G Erasehead 74 RNF 989 Spacer 0 1 RPBO8S 75 PMZ26P060FMC Screw 25 RPB 089 REC PB head 76 PMZ26P030FMC Screw 26 RBH 723 Headadlust spring 77 YE2OFUC Screw 27 RNL 523 Sub head base...

Page 21: ...rk Part No Main assembly DOLBY NR assembly Indicator assembly Volume assembly Sensingassembly Power switch assembly Transistor assembly E Transistor assembly F coMA 102K50 coMA 182K50 coMA 103J50 coMA 153J50 coMA 223J50 coMA 273J50 coMA 393J50 coMA 473J50 coPA 332J100 ccPSL 220J50 ccPsL 101J50 ccDsl 151K 500 CKPYB471K 50 RCC 007 cosH 471J50 c317 C318 c3 19 c l 1 3 C 2 1 3 cl17 C217 c31 6 c124 C125...

Page 22: ...412 U15 e c503 c505 c511 c512 Cs15 cEA470M 16 C417 cEA4 71 M16 C41 8 coMA 332K 50 C404 C504 coMA472J 50 C407 C507 coMA 153J50 C406 C409 C506 C509 ccPsL 101J50 C402 C502 OTHERS Mark Part No Symbol Description A 1sB3s 1oo D301 D302 D304 D3o8 D310 D318 RESISTORS D319 D303 D3O5 D3O7 D311 D317 Note When ordering resistors conuert the resistanceualue into code form and then rewrite the part no as before...

Page 23: ...Vmbol Doscription RD PM trDtrJ A RD pMFogoJ SEMICONDUCTORS Mark PartNo R601 R606 R609 R607 R608 A 2sD1276 Ql 101 Transistor 8A6124 L N 1 0 1 1 1 1 P LN317G P LN217RP SWITCHES Mark PartNo tc601 rc602 LED6O1 LED6O2 LED6O3 LED6O5 LED6O4 Symbol Description Symbol Description 9 PACKING 1 RHA 250 2 PRHOO1 3 RDEO10 4 RDG 045 5 RHG 539 6 RHX 031 7 RSG 143 VolumeAssembly Mark Part No 5601 5606 Pushswitch S...

Page 24: ...3 1O P C BOARDSCONNECTION DIAGRAM A B DOLBY Ass y RWX 638 INDICATOR RWX 639 ...

Page 25: ...r f 4 l MA NAss y RWX 632 Qto4 Q2O4 oroSQro6 a2o6 ato3qzoo Qro2 tc or e2o5 qlo7e o6 oao io7 q2oz q2o tcro3 etot eiot qro q lP vR2Ot vFtoi vRa tz I ...

Page 26: ...I 8 7 I QlOt Q tOt QltO QaOT A q30 cro2 curo50 06 B s t 2 0 l RASE PREVENT DETECTOR TRANSISTOR Ass y F POWERSWITCH As3 y TRANSISTOR as3 y E c D SENSOR Ass y I 8 7 ERASEHEAO ...

Page 27: ...25 too r5 8 t a f l R t_ I r3 34 t j i i Q 4 0 1 5 0 t 2 S C 1 8 t 5 o r Z S C l 7 4 O L N o r 2 S C 2 6 3 4 N C D 4 O t 5 0 1 1 5 2 4 7 3 o r U S I O 4 O D 4 0 2 5 0 2 1 M 5 0 R304 lOOlr t 15 l 2 7 I c330 o t6 R336 22k 1 trF l l I I I qTCtOsQ 4 I I t__ I IC rO B 4 5 D3r6 7 os 5 r l 2 41 t l I _l R2t3 R2r5 R2t4 c2t8tJ i i J i l o Il I t I csoo I T l l t f t t i l 1 2 Q r L i r T i l t l t l _ R 5 ...

Page 28: ... 5C17 4 0 o r 2 S C l 7 4 O L N l D301 3o 2 304 D 3 O 8 3 O 9 3 1 O 3 t g I s R 3 5 tO OA D303 305 306 307 D 3 lI 3 1 7 152473 orUStO4O o3t9 rsR35 OO 2D301 WZ t35 2 D 3 0 2 g z 1 3 5 2D303 BZ O5o 20304 wz o44 I R E S I S T O R S Ind cated in Q AW M M a F t 1 I 2 C A P A C I T O R S Indcated in capacitl Indlcation without 3 V O L T A G E C U R R E _ DC voltage I f mA DC current i 4 O T H E R S Sign...

Page 29: ...C4066BP HDl40668 MB84O66BM PM9OO2B S WI TC HES M A l N A s s y S l O 1 2 O l M l C L I N E S E L E C T O R M I C L I N E S 3 O 1 1 4 T A P E S E L E C T O R H I G H N O R M S 3 O I 5 8 T A P E S E L E C T O R METAL CrOz s 3 0 1 9 1 0 D O L E Y O N O F F 2SC1383NC Type No 2SC2060 Lot No 8A6124 R e c o r d i n gs i g n a l r o u t e I N DI C ATO R Ass y S 6 0 1 F F S 6 0 2 R E W 5 6 0 3 S T O P S 6 ...

Page 30: ...sembly part no RXB 715 or the drive arm full assembly part no RXB 376 Table1 TU reel baseass y Supply reel baseass y Playback mode 36 6Og cm 2 Sg cm Farst forward mode 85 125g cm 2 Sg cm Rewind mode 2 Sg cm 85 125s cm NOTE denotes bach tension torque 30 12 1 3 Tape SpeedAdjustment 1 Connect a frequency counter to the LINE OUTPUT terminals 2 Playbackthe SkHz portion of the STD 301 test tape At the ...

Page 31: ...FF solenoid plunger solenoid F Boss Drivingarmfull assemblyl FF position Contacting TU reelbase assembly ldlergear I FF Mode Supplyreelbase assembly REWsolenoid plunger solenoid Rl ldler L gear Fig 12 3 FF and REWsolenoid adjustment HiKq D Drivegear ...

Page 32: ... level 4 Playback equalization check 5 Level meter check 6 Record playback frequency response 7 Recording level L E V E L d B STD 341A STD 608A STD 603 STD604 Playback adjustments NORMAL blank tape CrO2 blank tape METAL blank tape Prepare the following measuring equipment AC millivoltmeter audio oscillator attenuator and oscilloscope Unless otherwise specified always adjust for both left and right...

Page 33: ...0dB Tapeselector NORM Mode Playback VR101 and VR201 Turn clo ckwise to maxi mum posrlron _pr Erasehead REC PB head Fig 12 8 Head azimuth adjustment Procedure Adjust the azimuth adjustment screw for maxi mum AC mV meter reading Lock the screwswith screw lock after completing the adjustment 12 2 3 Playback Level Adjustment Since this adjustment determines the DOLBY NR level during playback it should...

Page 34: ...ck that the level meter segments light up in a OdBt 1 seg ment range f JJ t s r m l O l rr zme I oolT ml o0 6effi 6 M Fig 12 10Playback equalization check Procedure 1 Play the 333H2 20dB portion and record the AC mV meter reading 2 Then play the 6 3kHz 2OdB portion and check that the meter reading lies within 1 5 t2dB of the reading obtained in step 1 above 3 Switch the tape selector to METAL play...

Page 35: ...e playback output signal level with the 333H2 level asthe referencelevel is 0 5dB Change the tape selector and DOLBY NR switch positions SeeFig L2 L3 14 and check that the frequency response is satisfactory Playback Frequency Response Test tape STD 341A T a p e s e l e c t o r N O R M DolbyNR switch OFF NOTE Due to edge effect compensate the right channel by O idB at 125H2 and ldB at 63H2 T 5 d a ...

Page 36: ...tep 1 above 3 Switch the tape selector to METAL play the 333H2 20dB portion again and record the meter reading 4 Then play the 6 3kHz 20dB portion again and check that the meter reading lies within 2 5t1dB of the reading obtained in step 3 12 2 5 LevelMeterCheck Settings AC mV meter Input signal Mode Connect to DOL L L ch and DOL R R ch 333H2 10dBv 316mV to INPUT terminals Record t sro ts l O l r ...

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