Technics-SLPD7-cd-sm 维修电路原理图.pdf

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1、Table Of ContentsRadioFans.CN 收音机爱 好者资料库Table Of ContentsCOVER1 Safety Precaution2 Before Repair and Adjustment3 Handling Precautions For Traverse Deck4 Precaution of Laser Diode5 Protection Circuitry6 Accessories7 Front Panel Controls7.1 Front Panel8 Operation Checks and Main Component Replacement

2、Procedures8.1 Checking Procedure for each major P.C.B.9 Self-Diagnostic Display Function10 Type Illustrations of ICs, Transistors& Diodes11 Terminal Functions of ICs11.1 IC701 (AN8885SBE1) Servo Amplifier11.2 IC702 (MN662790RSC) Servo processor/ Digital signal processor/ Digital filter/ D/A converte

3、r11.3 IC703 (AN8739SBE2) Focus coil/ Tracking coil/ Traverse motor/ Spindle motor driver11.4 IC401 (C2BBGD000075) Microprocessor12 Block Diagram13 Schematic Diagram14 Printed Circuit Board15 Troubleshooting Guide16 Wiring Connection Diagram17 Parts Location and Replacement Parts List17.1 CD Loading

4、Mechanism17.1.1 CD Loading Mechanism Part Location17.1.2 CD Loading Mechanism Part List17.2 CabinetRadioFans.CN 收音机爱 好者资料库file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/slpd7p.html30/09/2009 12:13:3217.2.1 Cabinet Parts Location17.2.2 Cabinet Parts List17.3 Electrical Parts List17.

5、4 Packing Materials& Accessories Parts List17.5 Packagingfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0000000000.html30/09/2009 12:14:24Service ManualTOP NEXTOrder No. MD0102030C1A2Compact Disc ChangerSL-PD7Colour(K) . Black TypeP . U.S.A.PC . CanadaTRAVERSE DECKRAE0152Z-3 Mecha

6、nism SeriesAUDIO No. of channels2 (left and right, stereo)Frequency response2-20000 Hz,1 dBOutput voltage2V (at 0 dB)Dynamic range92 dBS/N100 dBTotal harmonic distortion0.007% (1kHz, 0 dB)Wow and flutterBelow measurable limitDA converterMASH (1 bit)Output impedanceApprox. 1kO Load impedanceMore than

7、 10 kO PICKUP Wavelength780 nmGENERAL file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0000000000.html30/09/2009 12:14:24Power supplyAC 120 V, 60 HzPower consumption9 WDimensions (W x H x D)430 x 125 x 374 mm(16-15/16” x 4-29/32” x 14-23/32”)Mass4.5 kg (9.9 lb.)Power consumption in

8、standby mode:1 WNotes:1. Specifications are subject to change without notice./Mass and dimensions are approximate. 2001 Matsushita Electronics (S) Pte. Ltd. All rights reserved. Unauthorized copying and distribution is aviolation of law.TOP NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/S

9、L-PD7/SVC/s0100000000 x.html30/09/2009 12:14:251 Safety PrecautionTOP PREVIOUS NEXT(This “Safety Precaution” is applied only in U.S.A.)1. Before servicing, unplug the power cord to prevent an electric shock.2. When replacing parts, use only manufacturers recommended components for safety.3. Check th

10、e condition of the power cord. Replace if wear or damage is evident.4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistancetest to preve

11、nt the customer from being exposed to a shock hazard.Insulation Resistance Test1. Unplug the power cord and short the two prongs of the plug with a jumper wire.2. Turn on the power switch.3. Measure the resistance value with ohmmeter between the jumper AC plug and each exposed metal cabinetpart, suc

12、h as screw heads, antenna, control shafts, handle brackets, etc. Equipment with antenna terminalsshould read between 3MO and 5.2MO toall exposed parts*. (Fig 1) Equipment without antenna terminalsshould read approximately infinity to all exposed parts. (Fig 2)*Note: Some exposed parts may be isolate

13、d from the chassis by design. These will read infinity.4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipmentshould be repaired and rechecked before it is returned to the customer.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC

14、/s0100000000 x.html30/09/2009 12:14:25TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0200000000 x.html30/09/2009 12:14:252 Before Repair and AdjustmentTOP PREVIOUS NEXTDisconnect AC power, discharge Power Supply Capacitors C12 through a 10 O, 5 W resistor to groun

15、d. DO NOTSHORT-CIRCUIT DIRECTLY (with a screw driver blade, for instance), as this may destroy solid state devices.After repairs are completed, restore power gradually using a variac, to avoid over current.Current consumption at AC 120 V, 50 Hz and 60 Hz in NO SIGNAL mode should be 50130 mA and 4080

16、 mArespectively.TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0300000000 x.html30/09/2009 12:14:263 Handling Precautions For Traverse DeckTOP PREVIOUS NEXTThe laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by s

17、taticelectricity of clothes or human body.So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).Handling of traverse deck (optical pickup)1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electricalshock

18、.2. The short land between the No.4(LD) and No.5(GND) pins on the flexible board (FFC) is shorted with asolder build-up to prevent damage to the laser diode.To connect to the PC board, be sure to open byremoving the solder build-up, and finishthe work quickly.3. Take care not to apply excessive stre

19、ss to the flexible board (FFC).4. Do not turn the variable resistor (laser power adjustment). It has already been adjusted.Grounding for electrostatic breakdown prevention1. Human body groundingUse the anti-static wrist strap to discharge the static electricity from your body.2. Work table grounding

20、Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) isplaced, and ground the sheet.Caution:The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let yourclothes touch the traverse deck (optical pick

21、up).Caution when Replacing the Traverse Deck:The traverse deck has a short point shorted with solder to protect the laser diode against electrostaticsbreakdown. Be sure to remove the solder from the short point before making connections.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SV

22、C/s0300000000 x.html30/09/2009 12:14:26TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0400000000 x.html30/09/2009 12:14:264 Precaution of Laser DiodeTOP PREVIOUS NEXTCaution:This unit utilizes a class 1 laser. Invisible laser radiation is emitted from the optical

23、pickup lens. When the unit isturned on:1. Do not look directly into the pickup lens.2. Do not use optical instruments to look at the pickup lens.3. Do not adjust the preset variable resistor on the pickup lens.4. Do not disassemble the optical pickup unit.5. If the optical pickup is replaced, use th

24、e manufacturers specified replacement pickup only.6. Use of control or adjustments or performance of procedures other than those specified herein may result inhazardous radiation exposure.CAUTION!THIS PRODUCT UTILIZES A LASER.USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THO

25、SESPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0500000000 x.html30/09/2009 12:14:275 Protection CircuitryTOP PREVIOUS NEXTThe protection circuitry may have operated if either of the following conditions

26、 are noticed:No sound is heard when the power is turned on.Stops during a performance.The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speakerconnection wires are “shorted”, or if speaker systems with an impedance less than the indicated rated

27、impedanceofthe amplifier are used.If this occurs, follow the procedure outlines below:1. Turn off the power.2. Determine the cause of the problem and correct it.3. Turn on the power once again after one minute.Note:When the protection circuitry functions, the unit will not operate unless the power i

28、s first turned off and then onagain.TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0600000000 x.html30/09/2009 12:14:276 AccessoriesTOP PREVIOUS NEXTAC power supply cord. 1 pc.Stereo connection cable. 1 pc.TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd

29、7nasvc_ET/NA/SL-PD7/SVC/s0700000000 x.html30/09/2009 12:14:287 Front Panel ControlsTOP PREVIOUS NEXT7.1 Front PanelTOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0701000000.html30/09/2009 12:14:287.1 Front PanelTOP PREVIOUS NEXTTOP PREVIOUS NEXTfile:/E|/_MANUALS/T

30、ECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0800000000 x.html30/09/2009 12:14:298 Operation Checks and Main ComponentReplacement ProceduresTOP PREVIOUS NEXT“ATTENTION SERVICER”Some chassis components maybe have sharp edges. Be careful when diassembling and servicing.1. This section describes proc

31、edures for checking the operation of the major printed circuit boards and replacingthe main components.2. For reassembly after operation checks or replacement, reverse the respective procedures./Special reassemblyprocedures are described only when required.3. Select items from the following index wh

32、en checks or replacement are required.ContentChecking Procedure for each major P.C.B. P.g. 798.1 Checking Procedure for each major P.C.B.TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0801000000.html30/09/2009 12:14:308.1 Checking Procedure for each major P.C.B.TO

33、P PREVIOUS NEXTStep 1 Remove all the screws.Step 3 Remove all the screws and remove top cabinet as shown.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0801000000.html30/09/2009 12:14:30Step 4 Release the connectors CN601 and CN602.Step 5 Remove all the screws.Step 6 Pull the fron

34、t panel in both direction of arrow B to unlock the rib and then remove the front in the directionof arrow A.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0801000000.html30/09/2009 12:14:30Step 7 Remove all the screws.Step 8 To check Panel P.C.B. component side release both catche

35、s.Step 9 Keep the close lock gear pressed in the direction shown, and move the tray in the direction shown.Step 10 Fit the claw of the tray and the claw of the Base tray guide (left & right side).Step 11 Remove the screw and the Rotary tray.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD

36、7/SVC/s0801000000.html30/09/2009 12:14:30Step 12 Remove the connector CN403.Step 13 Remove the screw.Step 14 Pull the claw in the direction shown and remove the tray.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0801000000.html30/09/2009 12:14:30Step 15 Remove all the screws.Step

37、 16 Release the connectors CN302 and CN404.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0801000000.html30/09/2009 12:14:30TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0900000000 x.html30/09/2009 12:14:329 Self-Diagnostic Display FunctionTOP

38、PREVIOUS NEXTSelf-diagnostic displayThis unit is equipped with a self-diagnostic display function which, if a problem occurs, will display an error code correcsponding to the problem.Use this function when performing maintenance on the unit.Entering the Self-Diagnostic Mode1. With no CD loaded in th

39、e tray, turn on the unit.2. Unplug the power cord of the unit, and then plug it back in while pressing the STOP (), PLAY () and DISC 4 buttons together.This will bring up the FL display.3. Release the above three buttons.To Display Self-Diagnostics Results1. When the FL display lights up, the unit a

40、utomatically repeats an approximately 50-second cycle of the following operations.STARTA. Tray opens. - (A)B. Tray closes. - (B)C. Traverse deck lifts.D. Tray opens.E. Tray closes. - (B)F. Traverse deck lower down.G. Rotary tray turns counter-clockwise two disc slots. - (C)H. Traverse deck lifts onc

41、e, and then lowersI. Rotary tray turns clockwise one disc slot. - (C)J. Traverse deck lifts once, and then lowersK. Rotary tray turns clockwise three disc slots. - (C)L. Traverse deck lifts once, and then lowersM. Rotary tray turns counter-clockwise one disc slot. - (C)N. Traverse deck lifts once, a

42、nd then lowersO. Rotary tray turns counter-clockwise two disc slots./(Repeats from a - o).2. Self-diagnostic fault results appear on the FL display for approximatelly one second as “H15” at location (A), “H16” at (B) and “H18” at (C), during theabove cycle.To Return to Normal DisplayPress the power

43、button to off the unit, and then turn it on again.To Display Self-Diagnostics Results AgainFollow steps 1 through 3 of “Entering Self-Diagnostic Mode” above.file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s0900000000 x.html30/09/2009 12:14:32To Clear the Display of Self-Diagnostics

44、ResultsTurn off the unit to clear the contents of the stored faults results.Interpretation of error codesErrorcodeProblem conditionCorrection procedureH15CD tray does not open or close when CD tray open/close() button is pressed./When the CD open/close () button is pressed, the CD tray closes moment

45、arily but then opens again, or opens momentarily and thencloses again.Faulty loading motor and motor drive IC (IC501), or faulty contact or short-circuit on open/close detect switch, S551. (Checkand replace)H16F18Faulty rotary turret rotation detection. Example : The turret continues to turn at the

46、inintial position withoutstopping.Check the optical sensor (D501) and replace if necessary.TOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s1000000000 x.html30/09/2009 12:14:3310 Type Illustrations of ICs, Transistors& DiodesTOP PREVIOUS NEXTTOP PREVIOUS NEXTSL-PD8

47、1 AN8885SBE1 (28p)1UPD78044F186 (80p)MN662790RSC (80p)1BA4558FDXE21485BA6247NBA033TAN8739SBE22SA1037AKSTXBEC2SD2144STA2SC2785FETAKRA103MTAKRC107MTAKRC111MTA2SD1862QTV2KRC101MTAMTZJ3R6BTAMTZJ30BTAMTZJ5R1BTAMTZJ5R6BTAMTZJ6R2CTAMTJZ6R8CTAMTJZ9R1BTAMTZJ9R1CTAACaCathodeAnodeECBECB1102SB1238QRTV22SD1859QR

48、TV2BCEACaCathodeAnodeGL380PT381RSQGP1S53VSG-206SCaACECECaA2SD2037ETABCERL1N4003S-PRVD1SS133TAACaCathodeAnodeBCECaACathodeAnodeBCE321file:/E|/_MANUALS/TECHNICS/technics_sl-pd7nasvc_ET/NA/SL-PD7/SVC/s1100000000 x.html30/09/2009 12:14:3311 Terminal Functions of ICsTOP PREVIOUS NEXT11.1 IC701 (AN8885SBE

49、1) Servo Amplifier11.2 IC702 (MN662790RSC) Servo processor/ Digital signal processor/ Digital filter/ D/A converter11.3 IC703 (AN8739SBE2) Focus coil/ Tracking coil/ Traverse motor/ Spindle motor driver11.4 IC401 (C2BBGD000075) MicroprocessorTOP PREVIOUS NEXTfile:/E|/_MANUALS/TECHNICS/technics_sl-pd

50、7nasvc_ET/NA/SL-PD7/SVC/s1101000000.html30/09/2009 12:14:3411.1 IC701 (AN8885SBE1) Servo AmplifierTOP PREVIOUS NEXTPin No. Mark I/O Function 1PDEITracking signal input 12PDFITracking signal input 23VCCIPower supply4PDAIFocus signal input terminal 15PDBIFocus signal input terminal 26LPDIAPC amp input