Sony-CDFZW755-cs-sm 维修电路原理图.pdf

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1、Ver 1.0 2000.03CFD-ZW755SERVICE MANUALCD RADIO CASSETTE-CORDERSPECIFICATIONSUS ModelCDModel Name Using Similar MechanismCFD-ZW750/ZW770CD Machanism TypeKSM-213CDMSectionOptical Pick-up TypeKSS-213CTCModel Name Using Similar MachanismNEWSectionTape Transport Mechanism TypeMF-ZW755-117AUDIO POWER SPEC

2、IFICATIONSPOWER OUTPUT AND TOTAL HARMONIC DISTORTIONWith 3.2-ohm loads, both channel driven from 150 - 6,300 Hz; rated 1.6W per channel-minimum RMS power, with no more than10 % total harmonic distortion in AC operation.Other SpecificationsCD player sectionSystemCompact disc digital audio systemLaser

3、 diode propertiesMaterial: GaAlAsWave length: 780 nmEmission duration: ContinuousLaser output: Less than 44.6 W(This output is the value measured at a distance of about 200mm from the objective lens surface on the optical pick-upblock with 7 mm aperture.)Spindle speed200 r/min (rpm) to 500 r/min (rp

4、m) (CLV)Number of channels2Frequency response20 - 20,000 Hz +1/1 dBWow and flutterBelow measurable limitRadio sectionFrequency rangeFM: 87.5 - 108 MHzAM:530 - 1,710 kHzAntennasFM: Telescopic antennaAM: Built-in ferrite bar antennaCassette-corder sectionRecording system4-track 2 channel stereoFast wi

5、nding timeApprox. 120 s (sec.) with Sony cassette C-60Frequency responseTYPE I (normal): 80 - 10,000 HzGeneralSpeakerFull range: 10 cm (4 in.) dia.,3.2 ohms, cone type (2)OutputsHeadphones jack (stereo minijack)For 16 - 68 ohms impedance headphonesPower requirementsFor CD radio cassette-corder:120 V

6、 AC, 60 Hz9 V DC, 6 size D (R20) batteriesFor memory back-up:4.5 V DC, 3 size AA (R6) batteriesFor remote control:3 V DC, 2 size AA (R6) batteries Continued on page 2 RadioFans.CN 收音机爱 好者资料库 2 SAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITHMARK ! ON THE SCHEMATIC

7、 DIAGRAMS AND IN THE PARTSLIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR INSUPPLEMENTS PUBLISHED BY SONY.TABLE OF CONTENTSSpecifications . 11.SERVICING NOTES. 32.GENERAL. 43.DISASSEMBLY3-1. Cabinet (Rear) . 63-2. Power

8、 Board, Back up Board, Battery Board. 63-3. CD Block ASSY . 73-4. Control Board . 73-5. Power Key Board, Mega Bass Board, Preset Board, Volume Board . 83-6. Key Board. 83-7. Headphone Board . 83-8. REC SW Board, PB Board . 93-9. Mechanism Deck . 93-10. Capstan/reel Motor (M301), Belt . 103-11. Main

9、Board. 103-12. CD Board.113-13. Optical pick-up Block .114.ADJUSTMENTS4-1. Mechanical Adjustments. 124-2. Electrical Adjustments. 125.DIAGRAMS5-1. Explanation of IC Terminals. 155-2. Block Diagrams . 175-3. Schematic Diagram (Main Section) . 215-4. Printed Wiring Boards (Main Section) . 255-5. Print

10、ed Wiring Boards (Control Section) . 285-6. Schematic Diagram (Control Section). 315-7. Printed Wiring Boards (CD Section) . 345-8. Schematic Diagram (CD Section) . 376.EXPLODED VIEWS6-1. Rear Cabinet Section. 446-2. Front Cabinet Section. 456-3. CD Section . 466-4. Tape Mechanism Section-1 (MF-ZW75

11、5-117). 476-5. Tape Mechanism Section-2 (DECK A) (MF-ZW755-117) . 486-6. Tape Mechanism Section-3 (DECK A) (MF-ZW755-117) . 496-7. Tape Mechanism Section-4 (DECK B) (MF-ZW755-117) . 506-8. Tape Mechanism Section-5 (DECK B) (MF-ZW755-117) . 516-9. Optical pick-up Section (KSM-213CDM) . 526-10.Speaker

12、 Section. 537.ELECTRICAL PARTS LIST. 54CAUTIONUse of controls or adjustments or performanceof procedures other than those specified hereinmay result in hazardous radiation exposure.Power consumptionAC 15 WBattery lifeFor CD radio cassette-corder:FM recordingSony R20P:approx. 7.5 hSony alkaline LR20:

13、approx. 22 hTape playbackSony R20P:approx. 7 hSony alkaline LR20:approx. 20 hCD playbackSony R20P:approx. 3 hSony alkaline LR20:approx. 10 hFor memory back-up: approx. 1 yearDimensionsApprox. 650 x 265 x 256 mm (w/h/d)(25 58 x 10 12 x 10 18 inches) (incl. projecting parts)MassApprox. 6.7 kg (14 lb.

14、12 oz) (incl. batteries)Supplied accessoryAC power cord (1)Remote control (1)Design and specifications are subject to change without notice. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNITThe laser diode in the optical pick-up block may suffer electro-static breakdown because of the potenti

15、al difference generatedby the charged electrostatic load, etc. on clothing and the humanbody.During repair, pay attention to electrostatic breakdown and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handledwith car

16、e.NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focusedon the disc reflective surface by the objective lens in the opticalpick-up block. Therefore, when checking the laser diodeemission, observe more than 30 cm away from the objectivelens.Flexible Circui

17、t Board Repairing Keep the temperature of the soldering iron around 270C duringrepairing. Do not touch the soldering iron on the same conductor of thecircuit board (within 3 times). Be careful not to apply force on the conductor when soldering orunsoldering.Notes on chip component replacement Never

18、reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be dam-aged by heat.RadioFans.CN 收音机爱 好者资料库 3 CHUCK PLATE JIG ON REPAIRINGOn repairing CD section, playing a disc without the CD lid, useChuck Plate Jig. Code number of Chuck Plate Jig : X-4918-255-1SECTION 1

19、SERVICING NOTESLASER DIODE AND FOCUS SEARCH OPERATIONCHECK1.Turn on POWER button and press CD button to CDposition.2.Open the CD lid.3.Turn on S901 as following figure.4.Confirm the laser diode emission while observing theobjecting lens. When there is no emission, Auto PowerControl circuit or Optica

20、l Pick-up is broken.Objective lens moves up and down three for focus search.SAFETY CHECK-OUTAfter correcting the original service problem, perform thefollowing safety check before releasing the set to the customer :Check the antenna terminals, metal trim, “metallized” knobs,screws, and all other exp

21、osed metal parts for AC leakage. Checkleakage as described below.LEAKAGE TESTThe AC leakage from any exposed metal part to earth ground andfrom all exposed metal parts to any exposed metal part having areturn to chassis, must not exceed 0.5mA (500 microampers).Leakage current can be measured by any

22、one of three methods.1. A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the manufacturers instructions to use theseinstruments.2. A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.3. Measuring the voltage drop across a re

23、sistor by means of a VOMor battery-operated AC voltmeter. The “limit” indication is 0.75V,so analog meters must have an accurate low-voltage scale. TheSimpson 250 and Sanwa SH-63Trd are examples of a passiveVOM that is suitable. Nearly all battery operated digitalmultimeters that have a 2V AC range

24、are suitable. (See Fig. A)ACvoltmeter(0.75V)To Exposed MetalParts on SetEarth Ground0.15 F 1.5kFig. A. Using an AC voltmeter to check AC leakage.Insert a precisionscrew driver and push SWITCH (S901) 4 SECTION 2GENERALThis section is extracted frominstruction manual.Basic Operations4Playing a CDBasic

25、 OperationsTrack number Playing time3With the label side upDisplayFor hookup instructions, see pages 26 28.1Push 6 PUSH OPEN/CLOSEdown to open the CDcompartment and place the CDon the CD compartment.2Close the lid of the CDcompartment.3Press .The player turns on (directpower-on) and plays all the tr

26、acksonce.1,2Basic OperationsBasic Operations5Use these buttons for additional operationsTipNext time you want tolisten to a CD, just press. The player turns onautomatically and startsplaying the CD.ToDo thisadjust the volumeTurn VOLUME (PressVOL +, on the remote).stop playbackPress p.pause playbackP

27、ress ( P on theremote).Press the button again toresume play after pause.go to the next trackTurn PRESETTIME SETclockwise (Press + onthe remote).go back to the previous trackTurn PRESETTIME SETcounterclockwise (Press=on the remote).remove the CDPress 6 PUSH OPEN/CLOSE.turn on/off the playerPress POWE

28、R.POWER6 PUSH OPEN/CLOSEVOLUMEpPRESETTIME SETBasic Operations6Listening to the radioFor hookup instructions, see pages 26 28.1Press RADIO BAND until theband you want appears in thedisplay (direct power-on).Each time you press the button,the indication changes as follows:FM1 n FM2 n AM.2Hold down TUN

29、E + or until thefrequency digits begin to changein the display.The player automatically scansthe radio frequencies and stopswhen it finds a clear station.If you cannot tune in to a station,press the button repeatedly tochange the frequency step bystep.Display21Indicates an FM stereobroadcastBasic Op

30、erationsBasic Operations7Use these buttons for additional operationsTips The FM1 and FM2bands have the samefunctions. You can storethe stations you wantseparately in FM1 andFM2. If the FM broadcast isnoisy, press MODE until“Mono” appears in thedisplay and radio willplay in monaural. Next time you wa

31、nt tolisten to the radio, justpress RADIO BAND.The player turns onautomatically and startsplaying the previousstation.ToDo thisadjust the volumeTurn VOLUME (PressVOL +, on the remote).turn on/off the radioPress POWER.To improve broadcast receptionReorient the antenna for FM. Reorient the player itse

32、lffor AM.for FMfor AMVOLUMEPOWERMODE 5 Basic Operations8Playing a tapeFor hookup instructions, see pages 26 28.1Press p6 to open the tapecompartment and insert arecorded tape. Use TYPE I(normal) tape only. Close thecompartment.2Press (.The player turns on ( directpower-on) and starts playing.With th

33、e side you wantto play facing you1212DisplayBasic OperationsBasic Operations9Use these buttons for additional operationsToDo thisadjust the volumeTurn VOLUME (PressVOL +, on the remote).stop playbackPress p6.fast-forward or rewind the tapePress ) or 0.pause playbackPress P.Press the button again tor

34、esume play after pause.eject the cassettePress p6.turn on/off the playerPress POWER.NoteDuring playback, do notpress buttons on theother deck. Otherwisethe playback speed maychange.TipNext time you want tolisten to a tape, justpress (. The playerturns on automaticallyand starts playing thetape.POWER

35、VOLUME0, )0, )p6Pp6PBasic Operations10Recording on a tapeFor hookup instructions, see pages 26 28.1Press p6 to open the tapecompartment on deck B andinsert a blank tape. Use TYPE I(normal) tape only.2Select the program source youwant to record.To record from the CD player:insert a CD (see page 4) an

36、d pressCD.To record from the radio:tune in the station you want (seepage 6).To record from the tape (dubbing):insert a recorded tape into deck Aand press TAPE until “dUb”appears in the display.DisplayWith the side you want torecord on facing you312Basic OperationsBasic Operations113Start recording.T

37、o record from the CD player andthe radio, press r on deck B (is depressed automatically).To record from the tape, press ron deck B (is depressedautomatically). Then press ( ondeck A.Deck BToPressstop recordingp6 on deck Bpause recordingP on deck BPress the button again toresume recording.turn on/off

38、 the playerPOWERUse these buttons for additional operationsTips Adjusting the volume orthe audio emphasis (seepage 25) will not affectthe recording level. For the best results, usethe AC power as apower source. If the AM programmakes a whistlingsound after youvepressed r in step 3,press MODE repeate

39、dlyuntil the noise at aminimum.POWERp6PTo erase a recording, proceed as follows:1Insert a tape whose recording you want to erase intodeckB.2Press TAPE untill “TAPE” appears in the display.3Press r on deck B.Deck AMODE 6 SECTION 3DISASSEMBLYNote : Follow the disassembly procedure in the numerical ord

40、er given.3-1. CABINET (REAR)3-2. POWER BOARD, BACK UP BOARD, BATTERY BOARDz The equipment can be removed using the following procedure.Cabinet (Front) sub ASSYPower board, Back up board, Battery boardCabinet (Rear) SetCD block ASSYPower key board, Mega bass board, Preset board, Volume boardKey board

41、Control boardHeadphone boardMain boardCD boardOptical pick-up blockREC SW board, PB boardMechanism deckCapstan/reel motor (M301), Belt2 Screws (BVTP 3x10)63 Screws (BVTP 3x14)5 Screw (BVTP 3x14)4 Screws (BVTP 3x14)1 HandleCabinet (rear)7 CNP901Cabinet (front) sub ASSYPOWER boardBack up board6 ClawBa

42、ttery board3 Screws (BVTP 3x10)8 Bracket (2), Yoke1 CN9034 Screws (BVTP 3x10)Cabinet (rear)2 CN904759 7 3-3. CD BLOCK ASSY3-4. CONTROL BOARD2 CN31042 CN3052 CN3032 CN3113 To S901 (CD door open/close)CD block ASSY2 Wire, parallel (23 core) (CN308)2 CN3061 Screws (BVTP 3x12)1 Screws (BVTP 3x12)Cabinet

43、 (front) sub ASSY2 Screws (BVTP 2.6x8)3Control board1 CN8082 Screws (BVTP 2.6x8)1 CN8061 CN807Cabinet (front) sub ASSY 8 3-5. POWER KEY BOARD, MEGA BASS BOARD, PRESET BOARD, VOLUME BOARD3-6. KEY BOARD3-7. HEADPHONE BOARD7 Screw (BVTP 2.6x8)qs Screw (BVTP 2.6x8)9qf246 Nut and washer5 Knod, preset1 Sc

44、rews (BVTP 2.6x8)3 Screws (BVTP 2.6x8)8 Clawsqd ClawsCabinet (front) sub ASSYPreset boardMega bass boardVolume boardPower key boardqa Nut and washer0 Knod, volume21 Claws1 ClawsKey boardControl board21 Bracket (2), yokeHeadphone board 9 3-8. REC SW BOARD, PB BOARD3-9. MECHANISM DECK3 Screw (BVTP 3x1

45、0)472 Remove solder1 CN3046 Screw (BVTP 3x10)REC SW boardPB boardWHTBLKREDShield5 Remove solderWHTBLKShieldCabinet (front) sub ASSY1 Screws (BVTP 3x10)Mechanism deck2Cabinet (front) sub ASSY 10 3-10. CAPSTAN/REEL MOTOR (M301), BELT3-11. MAIN BOARDDECK ASSY, ADECK ASSY, B3 Belt1 Screws (+PTT 2x5)4 Sc

46、rews (M2.6x2.5)25 Capstan/reel motor (M301)3 Belt1 Screws (+PTT 2x5)Chassis (sub)1 Screw (+PTT 2x5)2 Screws (BVTP 3x10)31 CNP7042 Screws (BVTP 3x10)CD block ASSYCD boardMain board 11 3-12. CD BOARD3-13. OPTICAL PICK-UP BLOCK3 Screws (BVTP 3x10)1 Wire, parallel (16 core) (CN701)42 CN7023 Screws (BVTP

47、 3x10)CD block ASSYCD board1 Screws (+PWH 2.6x10)1 Screws (+PWH 2.6x10)2Optical pick-up blockChassis, CD 12 PRECAUTION1. Clean the following parts with a denatured-alcohol-moistenedswab :record/playback headpinch rollererase headrubber beltcapstan2. Demagnetize the record/playback head with a head d

48、emagne-tizer. (Do not bring the head demagnetizer close to the erasehead.)Do not use a magnetized screwdriver for the adjustments.3. These measurement adjustment should be performed with therated power supply voltage (9 V) unless otherwise noted.Torque Measurement DECK A DECK BModeTorque MeterMeter

49、ReadingForward22.5 to 55 g cmCQ-102C(0.32 to 0.76 oz inch)Forward2 to 5 g cmback tension(0.03 0.069 oz inch)Fast Forward60 to 120 g cmandCQ-201BRewind(0.84 1.66 oz inch)Tape Tension MeasurementDECK A DECK BModeTorque MeterMeter ReadingForwardCQ-403Amore than 150 g(more than 5.3 oz)4-1. MECHANICAL AD

50、JUSTMENTS TAPE SECTIONStandard Output levelOutout terminalSP OUTPHONES OUTload impedance3.2 32 output signal level0.775V (0dB)0.25V (10dB)Test TapeTypeSignalUsed forWS-48A3kHz, 0 dBTape Speed AdjustmentTape Speed Adjustment DECK A DECK BProcedure :1. Playback WS-48A (tape center part) and adjust RV3