Technics-SJHD515-md-sm 电路图 维修手册.pdf

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1、AD0003058C2 Mini Disc Deck SJ-HD515 Mechanism Unit: MR3A Colour (S).Silver Type Area (E).Europe. SPECIFICATIONS 1 RadioFans.CN 收音机爱 好者资料库 2000 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. 1. Note Refer to the service manua

2、l for Model No. SE-HD515MD (ORDER No. AD0003056C2) for information on Accessories and Packaging. 2. Blue LED - The blue LED mounted to each sides of front panel is very sensitive to static electricity. When handling the LED base plate, be very careful about it. - Do not replace the blue LED by itsel

3、f because it may be subject to electrostatic breakdown or deterioration in quality. When replacing the LED base plate, be sure to replace L and R sides simultaneously to adjust the brightness. For configuration at the time of supply of replacement parts, refer to Printed Circuit Board Diagram. 3. Be

4、fore Repair This equipment (SJ-HD515), which is a component of the system, is supplied with power from the Amplifier (SE-HD515MD) through the Tuner (ST-HD515MD). When repairing this equipment or checking operation of the system, be sure to connect to the amplifier and tuner with it. This equipment,

5、even in the state of it as a single equipment, permits power supply and operation check. When operating it as a single equipment without the amplifier and tuner, refer to the To Supply Power Source and Signal Check . 4. Handling Precautions for MD Unit The laser diode in the MD unit (optical pickup)

6、 may break down due to potential difference 2 RadioFans.CN 收音机爱 好者资料库 caused by static electricity of clothes or human body. So be careful of electrostatic breakdown during repair of the MD unit (optical pickup). 4.1. Handling of MD Unit (optical pickup) 1. Do not subject the MD unit (optical pickup

7、) to static electricity as it is extremely sensitive to electrical shock. 2. To protect the breakdown of the laser diode, an anti-static shorting pin is inserted into the flexible board (FPC board). Refer to Fig. 4-1. 3. Take care not to apply excessive stress to the flexible board (FPC board). Fig.

8、 4-1. 4.2. Grounding for electrostatic breakdown prevention 4.2.1. Human body grounding Use the anti-static wrist strap to discharge the static electricity from your body. Refer to Fig. 4-2. Fig. 4-2. 4.2.2. Work table grounding Put a conductive material (sheet) or steel sheet on the area where the

9、MD unit (optical pickup) is placed, and ground the sheet. Refer to Fig. 4-3. Fig. 4-3. 3 RadioFans.CN 收音机爱 好者资料库 Caution: The static electricity of your clothes will not be grounded through the wrist strap. So take care not to let your clothes touch the MD unit (optical pickup). 5. Precaution of Las

10、er Diode 6. Location of Controls 7. Operation Checks and Component Replacement / Procedures - This section describes procedures for checking the operation of the major printed circuit boards and replacing the main 4 components. - For reassembly after operation checks or replacement, reverse the resp

11、ective procedures. Special reassembly procedures are described only when required. 7.1. Checking for the main P.C.B. - Check the main P.C.B. as shown below. 7.2. Checking for the MD servo P.C.B. 7.2.1. Checking for the MD servo P.C.B. (A side) - Follow the (Step 1) - (Step 3) of item 7.1. 5 - Check

12、the MD servo P.C.B. (A side) as shown below. 7.2.2. Checking for the MD servo P.C.B. (B side) 6 7.3. Replacement for the magnetic head and optical pickup - Follow the (Step 1) - (Step 3) of item 7.1. 7 8 9 10 7.4. Replacement for the belt and loading motor assy - Follow the (Step 1) - (Step 3) of it

13、em 7.1. 11 12 7.5. Replacement for the traverse motor assy - Follow the (Step 1) - (Step 3) of item 7.1. - Follow the (Step 1) - (Step 11) of item 7.3. 13 14 8. Self-Diagnostic Function This unit is equipped with a Self-Diagnostic Function, so that if the unit operates incorrectly, the fault is disp

14、layed using an error code on the FL display of the Tuner (ST-HD515MD). The system control IC and FL display are part of the tuner so make sure the system has been connected properly before using this function. (This unit can be operated independently, although the Self-Diagnostic Function cannot be

15、used.) Use this Self-Diagnostic Function when servicing the unit. 8.1. Setting to the Self-Diagnostic Function 1. Turn on the power. 2. Hold down the button for at least 2 seconds and then press the button for at least 2 seconds while continuing to hold down the button. Refer to Fig. 8-1. The unit s

16、ets to Self-Diagnostic Function. Then an error code is displayed on the FL display of the Tuner (ST-HD515MD) if any. For details of the error code, refer to Table 8-1. In case of no error, “ ” is displayed on the FL display of the tuner. 3. If more than one error exists, the display will sequentiall

17、y show 15 the respective error codes each time button is pressed. Fig. 8-1. Table 8-1. Error codeSymptomPossible cause F15Interval till MD starts playing is too long. -Traverse det. switch (S8) is defective; Check and replace if necessary. F28MD cannot be loaded.-Confirm that the disc is not catchin

18、g on anything. -The connection (flexible circuit board or connector cable) between the and MD servo circuit board is disconnected or damaged; check and replace necessary. -The MD unit may be malfunctioning; replace it. F29MD cannot be ejected.-Confirm that the disc is not catching on anything. -The

19、connection (flexible circuit board or connector cable) between the and MD servo circuit board is disconnected or damaged; check and replace necessary. -The MD unit may be malfunctioning; replace it. 8.2. Canceling the Self-Diagnostic Function The Self-Diagnostic Function can be canceled by pressing

20、the power button (POWER) on the Amplifier (SE-HD515MD) to turn off the system. And then pressing the power button again to turn it on again. 8.3. Clearing the Self-Diagnostic Function The contents of abnormality display are stored in memory. In order to clear the memory, continue to press the STOP b

21、utton for at least 2 seconds while in the Self-Diagnostic Function. The memory will clear. Always be sure to clear this memory after completing repair. 9. To Supply Power Source and Signal Check Caution: - It is very dangerous to look at or touch the laser beam. (Laser radiation is invisible.) With

22、the unit turned ON, laser radiation is 16 emitted from the pickup lens. - Avoid exposure to the laser beam, especially when performing adjustments. This unit (SJ-HD515) is designed to operate on power supplied from the Amplifier (SE-HD515MD) through the Tuner (ST- HD515MD). When connecting the unit

23、to other system components, do not connect to the Amplifier (SE-HD515MD) directly. When operating the unit (SJ-HD515) alone for testing and servicing without having power supplied from the Amplifier (SE-HD515MD), use the following method. 9.1. Power Supply to This Unit alone 1. Setting of the unit s

24、witches: Set MARKING to AUTO and TRACK to ONE. Refer to Fig. 9-1. 2. Short the IC10-pin 67 (TP77) and GND (TP74) with the lead wire. Refer to Fig. 9-2. (This enables the unit to enter the operation mode and to active the operation switches on the front panel.) 3. Apply DC 10 V between the CP304-pin

25、5 (+10 V) and CP304-pin 11 (GND). Refer to Fig. 9-3. (The LED of REC and PLAY will light up. The PLAY LED is orange color.) Fig. 9-1. Fig. 9-2. 17 Fig. 9-3. 9.2. Preparation for Play/Rec Signal Check Connect the oscilloscope or the speaker with built-in amplifier to the section between CP304- pin 12

26、 (R ch OUT) and CP304-pin 17 (A.GND) as well as the section between CP304-pin 14 (L ch OUT) and CP304-pin 17 (A.GND) and check if the signals are outputting from this unit. Refer to Fig. 9-3. 9.3. Checking Play/Rec Signal to This Unit alone 9.3.1. Necessary Instruments - Recorded MD - Recordable MD

27、- Optical fiber cable - Portable CD player and CD (You can check this operation with any other player that has an optical digital output terminal but the portable CD player. The following procedure explains check operation with the portable CD player, but the procedure is the same for other players.

28、) 9.3.2. Playback Signal Check 1. Set the unit so that Power Supply to This Unit alone as previously explained. 18 2. Prepare for Play/Rec Signal Check. 3. Set the recorded MD in the unit. 4. Press the button and check if the MD play backs normally. (When the button is pressed, the PLAY LED turns gr

29、een.) Refer to Fig. 9-4. 5. Remove the MD after check. (Continued to Recording Signal Check.) Fig. 9-4. 9.3.3. Recording Signal Check 1. After completing the item 5 of Playback Signal Check, connect to the portable CD player (or any other player with an optical digital output terminal). Refer to Fig

30、. 9-5. 2. Set the recordable MD. 3. Press the REC button. The REC LED (red color) blinks. Refer to Fig. 9-4. 4. Playback the CD and press the button. The recording starts. Refer to Fig. 9-4. 5. Press the button. (UTOC will be written.) Refer to Fig. 9-4. 6. Playback the MD and check if the MD is rec

31、orded. 7. Remove the MD after check. 19 8. Turn off the power, and remove the lead wire between the IC10- pin 67 (TP77) and GND (TP74). (Refer to Power Supply to This Unit alone.) Fig. 9-5. 10. Schematic Diagram Notes - This schematic diagram may be modified at any time with the development of new t

32、echnology. Notes: S1: PROTECT det. switch S2: REFLECT det. switch S3: LOAD OPEN det. switch S4: DISC IN det. switch S5: LOAD PLAY/REC det. switch S6: LOAD PLAY det. switch S7: LOAD TRG det. switch S8: 20 Traverse det. switch S401: Eject switch (EJECT) S402: CD edit recording switch (CD EDIT) S403: E

33、nter switch (ENTER) S404: Edit switch (EDIT) S405: Stop switch () S406: Pause switch () S407: Playback switch () S408: Record switch (REC) S409: R.Skip/search switch () S410: F.Skip/search switch () S411: Marking mode select switch in AUTO position (MARKING) 21 S412: One track/all tracks switch in O

34、NE position (TRACK) VR1: Laser power adjustment VR - Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist some errors in the voltage values, depending on the internal

35、 impedance of the DC circuit tester. No mark : MD Stop ( ) : MD Play : MD Rec - Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low

36、-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufacturers specified parts shown in the parts list. - Caution! IC and LSI are sensitive to static electricity. Secondary trouble can be prevented by taking care during repair. Cover the parts boxes made of pl

37、astics with aluminum foil. Ground the soldering iron. Put a conductive mat on the work table. Do not touch the legs of IC or LSI with the fingers directly. - Voltage and signal line : Positive voltage line 22 : Playback signal line : Recording signal line 11. Schematic Diagram 12. Printed Circuit Bo

38、ard Diagram 13. Type Illustration of ICs, Transistors and Diodes 14. Wiring Connection Diagram 15. Block Diagram 16. Troubleshooting Guide 17. Terminal Function of ICs 17.1. IC1 (AN8772FHQ): RF Amp 23 Pin No. Terminal Name I/OFunction 1CENVDID signal detection input 2LDOOLD amp output terminal 3APC

39、PDIPhoto diode detection input 4LD INILD amp input 5APC REF IAPC amp reference voltage input 6 TEMP INITemperature sensor amp input 7TEMPOTemperature sensor amp output 8ADIPOADIP FM signal output 9TOFSITracking error off-set adjustment input 10TBALITracking balance adjustment signal input 11TEOTrack

40、ing error signal output 12CRS INITrack cross signal input 13TGAINITE gain adjustment input 14LNPOLens position signal output 15 AB GAINIAPP signal gain adjustment input 16FEOFocus error signal output 17 AS GAINIAS gain adjustment input 18FBALIFocus balance adjustment input 19AS/ MON3T OAS signal out

41、put 20CEAI3T envelope detection input 21BDO/ TRCRS OBDO/Track cross signal output 22CBD OOBDO detection capacitor terminal 23OFT OOOff-track detection signal output 24GND-GND terminal 25OFT INIOff-track detection signal input 26VCCIPower supply terminal 27 NRFDET / OFTR ORF detect signal output/Off-

42、 track signal output 28NRFLDISerial command latch signal input 29RF DATA ISerial command data signal input 30RFCKISerial command clock signal input 31NRFSTBYIStandby control signal input 32 OUT RFOEFM signal output 24 Pin No. Terminal Name I/OFunction 33CRF AGC -RFAGC capacitor connect terminal 34EQ

43、 INIEQ input 35ARFOORF amp output 36SVREFIReference signal input 37VREFOReference voltage output 38RF1IRF 1 signal input 39RF2IRF 2 signal input 40F1IF 1 signal input 41F2IF 2 signal input 42CLPF1IAPP correction CPF capacitor connect terminal 43CLPF1IRF equalizer adjustment resistor connect terminal

44、 44AIMain beam A signal input 45BIMain beam B signal input 46CIMain beam C signal input 47DIMain beam D signal input 48 CENVCIC signal detection input 17.2. IC2 (AN8814SB-E1): / Focus/Tracking Coil, / Spindle/Traverse Motor Drive Pin No. Terminal Name I/OFunction 1REG B-3.3 V external transistor con

45、trol (Not used, open) 2REG M-3.3 V regular output monitor (Not used, connected to GND) 3NC-Not used, open 4OPOOOp-amp output 5OP-IOp-amp invert input 6OP+-Op-amp non-invert output (Not used, connected to GND) 7VCCIPower supply terminal 81/2PVCC 2 O1/2PVCC output terminal 2 (Connected to GND via capa

46、citor) 9PVCC2IPower supply terminal for driver 10 PGND2-GND terminal 11VO4-OTracking coil drive output 12VO4+OTracking coil drive output 13VO3-OFocus coil drive output 25 Pin No. Terminal Name I/OFunction 14VO3+OFocus coil drive output 15VO2-OTraverse motor drive output 16VO2+OTraverse motor drive o

47、utput 17VO1-OSpindle motor drive output 18VO1+OSpindle motor drive output 19 PGND1-GND terminal 20PVCC1IPower supply terminal 21 1/2PVCC 1 O1/2PVCC output terminal 1 (Connected to GND via capacitor) 22VREFIReference voltage input 23IN1ISpindle motor drive signal input 24PC1IPower cut 1 input 25IN2IT

48、raverse motor drive signal input 26PC2IPower cut 2 input 27IN3IFocus drive signal input 26IN4ITracking drive signal input 17.3. IC3 (MN66616RA4): / ATRAC Encoder/Decoder, Servo Signal Processor Pin No. Terminal Name I/OFunction 1ADIPIADIP FM signal input 2LNPILens position signal input 3FEIFocus err

49、or signal input 4TEITracking error signal input 5ASIAS signal input 6 DRMONI IDrive voltage monitor input 7BATIBattery power supply terminal 8AMONI-Servo analog monitor signal output (Not used, open) 9VREFIIReference voltage input 10TOFSOTracking error off-set adjustment output 11FBALOFocus balance adjustment output 12TBALOTracking balance adjustment output 13TGAINOTE error gain adjustment output 26 Pin No. Terminal Name I/OFunction 14 ASGAINOMain beam amp gain adjustment output 15 ABGAINOAPP adjustment output 16AVDD1IPower suppl