Technics SL-EH760 Service Manual
  1. Manuals
  2. Brands
  3. Technics Manuals
  4. Stereo System
  5. SL-EH760
  6. Service manual

Technics SL-EH760 Service Manual

Hide thumbs Also See for SL-EH760:
Table of Contents

Advertisement

Quick Links

AD0002035C2
Compact Disc Player
SL-EH760
Traverse Deck:RAE0152Z-1 Mechanism series
Colour
(S)..........Silver Type
Area
(E)..........Europe.
SPECIFICATIONS

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the SL-EH760 and is the answer not in the manual?

Questions and answers

Related Manuals for Technics SL-EH760

Summary of Contents for Technics SL-EH760

  • Page 1 AD0002035C2 Compact Disc Player SL-EH760 Traverse Deck:RAE0152Z-1 Mechanism series Colour (S)..Silver Type Area (E)..Europe. SPECIFICATIONS...

  • Page 2: Handling Precautions For Traverse Deck

    1. Note Refer to the service manual for Model No. SA-EH760 (Order No. AD0002037C2) for information on Packaging. 2. Handling Precautions for Traverse Deck The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of clothes or human body.

  • Page 3: Precaution Of Laser Diode

    2.2.2. Work table grounding Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is placed, and ground the sheet. Refer to Fig.2-3. Fig.2-3. Caution: The static electricity of your clothes will not be grounded through the wrist strap.
  • Page 4 3. Do not look at the focus lens using optical instruments. 4. Recommend not to look at the pickup lens for a long time. 4. Location of Controls 5. Operation Checks and Component Replacement Procedures...
  • Page 5 5.1. Checking for the main P.C.B. - Check the main P.C.B. as shown below.
  • Page 6 5.2. Checking for the operation P.C.B. - Follow the (Step 1) - (Step 3) of item 5.1.
  • Page 7 - Check the operation P.C.B. as shown below. 5.3. Checking for the CD servo P.C.B. - Follow the (Step 1) - (Step 3) of item 5.1.
  • Page 8 - Check the CD servo P.C.B. as shown below.

  • Page 9: Replacement For The Traverse Deck Ass'y

    5.4. Replacement for the traverse deck ass’y - Follow the (Step 1) - (Step 3) of item 5.1. - Follow the (Step 1) - (Step 4) of item 5.2.

  • Page 15: Replacement For The Disc Tray

    5.5. Replacement for the disc tray - Follow the (Step 1) - (Step 3) of item 5.1. - Follow the (Step 1) - (Step 4) of item 5.2.

  • Page 18: Disassembly And Reassembly For Mechanism Base Drive Unit

    5.6. Disassembly and reassembly for mechanism base drive unit - Follow the (Step 1) - (Step 3) of item 5.1. - Follow the (Step 1) - (Step 4) of item 5.2. - Follow the (Step 1) - (Step 10) of item 5.4. - Follow the (Step 1) - (Step 12) of item 5.5.

  • Page 30: Replacement For The Motor Ass'y

    / / / 5.7. Replacement for the motor ass’y - Follow the (Step 1) - (Step 3) of item 5.1. - Follow the (Step 1) - (Step 4) of item 5.2. - Follow the (Step 1) - (Step 10) of item 5.4.
  • Page 32 6. Error Code Display and Servo Adjustment Function This unit has an error code display function, so that if the unit operates incorrectly, the fault is displayed using an error code on the FL display of the Tuner/Amplifier (SA-EH760). It also has a servo adjustment function for displaying the status of servo system functions (Focus, Tracking, CLV servo) on the FL display of the Tuner/Amplifier.
  • Page 33 6.2. Servo Adjustment Procedure 1. Turn on the power. 2. Load the test disc (SZZP1054C). 3. Hold down the REPEAT button for at least 2 seconds, and then press the PAUSE button for at least 2 seconds while continuing to hold down the REPEAT button.
  • Page 34 Symptom Probable cause Signal to check Normal voltage error waveform values code / Signal Location PLAY STOP display name Focus and MDATA IC702-8 pin Clocks X1 IN and X2 OUT, tracking power supply V and reset/ MCLK IC702-7 pin offset RST, all on IC702.

  • Page 35: To Supply Power Source

    E04, Best Eye (PD FBAL IC702-30 1.7 V Scratches or contaminants on E06, balance) disc surface. E0C, adjustment IC701-8 pin Focus and Tracking servo E0E, circuit (check waveforms, completed in voltages and part values.) IC702-32 the specified Optical pickup. time period. /TLOCK IC702-12 IC702-36 E08,...
  • Page 36 Notes: Tray position 1 detect switch in OFF position Tray position 2 detect switch in OFF position Tray open detect switch in OFF position Clump switch in OFF position Bottom switch in OFF position S601: Disc direct open switch / (DIRECT OPEN DISC 5) S602: Disc direct open switch / (DIRECT OPEN DISC 4) S603:...
  • Page 37 Disc tray open/close switch / ( OPEN/CLOSE) S612: Pause switch ( S613: F.Skip/search switch ( S614: Play switch ( S615: Stop switch ( S616: R.Skip/search switch ( S617: Random play switch (RANDOM) S618: Repeat switch (REPEAT) S619: CD edit switch (EDIT) S701: Rest detect switch in OFF position - Indicated voltage values are the standard values for the unit...

  • Page 38: Schematic Diagram

    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 impedance of the DC circuit tester. No mark : CD Stop : CD Play [1 kHz, L+R, 0 dB] - Important safety notice: Components identified by mark have special characteristics...
  • Page 39 10. Printed Circuit Board Diagram 11. Type Illustration of ICs, Transistors and Diodes 12. Wiring Connection Diagram 13. Block Diagram 14. Troubleshooting Guide 15. Terminal Function of ICs 15.1. IC451 (M38504M6200F): / System Control Function Terminal Name Power supply terminal VREF Reference voltage input GND terminal...
  • Page 40 Function Terminal Name E-CS EEPROM serial communication signal (Not used, open) 18 RESET Reset signal input X IN Oscillator connected terminal (8 MHz) 20 X OUT GND terminal LED serial strobe signal output LED serial clock signal output LED serial data signal output Not used, open 26 MSEL Function select signal input /...
  • Page 41 Function Terminal Name Tracking signal input terminal 1 (E ch) Tracking signal input terminal 2 (F ch) Power supply terminal Focus signal input terminal 1 (A Focus signal input terminal 2 (B Laser PD signal Laser power auto control output RF amp terminal RFIN AGC input terminal...
  • Page 42 Function Terminal Name BCLK Serial bit clock output (Not used, open) LRCK L/R discriminating signal output (Not used, open) 3 SRDATA Serial data signal output (Not used, open) Power supply terminal GND terminal Digital audio interface signal output MCLK Command clock signal input 8 MDATA Command data signal input Command load signal input...
  • Page 43 Function Terminal Name Turntable motor drive signal output (Servo error signal) KICK Kick pulse output (Not used, open) Tracking drive signal output Focus drive signal output VREF D/A drive output normal voltage input FBAL Focus balance adj. output TBAL Tracking balance adj. output Focus error signal input Tracking error signal input 34 RFENV...
  • Page 44 Function Terminal Name 55 SUBC Sub-code serial output clock (Not used, open) 56 SBCK Sub-code serial input data (Not used, connected to GND) GND terminal X1 IN Crystal oscillator terminal (f= 33.8688 MHz) 59 X2 OUT Power supply terminal 61 BYTCK Byte clock signal (Not used, open) 62 /CLDCK...

  • Page 45: Replacement Parts List

    Function Terminal Name 79 MSEL Output frequency select signal input (Not used, connected to GND) SSEL SUBQ output mode select signal input (Not used, connected to V 15.4. IC703 (AN8739SBE2): / Focus Coil/Tracking Coil/ / Traverse Motor/Spindle / Motor Drive Function Terminal Name...
  • Page 46 - 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-noise (resistors), etc. are used. When replacing any of components, be sure to use only manufactures specified parts shown in the parts list.

  • Page 47: Drive Gear

    SCREW REZ1200-1 REZ1201-2 RYF0520B-1S CD LID ASS’Y XTW3+8T SCREW RKA0105-K RUBBER RKA0106-N FOOT RING RYP0896E-1S FRONT PANEL ASS’Y 10-1 RGB0025-A TECHNICS BADGE XTBS3+8JFZ1 SCREW XTB3+8JFZ SCREW RAE0152Z-1 TRAVERSE DECK ASS’Y 301-1 SHGD113-1 RUBBER 301-2 SNSD38 SCREW 301-3 RAF0150A-1 OPTICAL PICK-UP...
  • Page 48 Ref. No. Part No. Part Name & Description Pcs Remarks RME0258 SPRING RME0261 SPRING RML0516 LEVER RML0517 LEVER RML0518 LEVER RML0519 LEVER RML0520 TRAY LOCK RML0521 REAR LOCK RML0525 FRONT LOCK RML0530 LEVER RMM0201 SLIDE PLATE 1 RMM0202 SLIDE PLATE 2 RMB0551 SPRING RMB0553...
  • Page 49 Ref. No. Part No. Part Name & Description Pcs Remarks ECBT1H102KB5 50V 1000P RCE1CKA470BG 16V 47U ECA1CM471 16V 470UF ECBT1E103ZF 25V 0.01U ECEA1AKS221 10V 220U ECEA1AKS221 6.3V 220U ECBT1H102KB5 50V 1000P ECBT1C103MS5 16V 0.01U ECEA1AKS221 6.3V 220U C151,52 ECBT1H102KB5 50V 1000P C401 RCE1HKA3R3BG 50V 3.3U C402...
  • Page 50 Ref. No. Part No. Part Name & Description Pcs Remarks C747 ECUV1H181KCN 50V 180P C749 ECUE1H222KBN 50V 2200P C750,51 ECUZNE104MBN 25V 0.1U C752 ECUE1H102KBN 50V 1000P C753 ECUV1H471KBM 50V 470P C754 ECUE1H471KBN 50V 470P C760 ECUV1E104KBN 25V 0.1U RJS1A9414 CONNECTOR(14P) CN401 RJS1A6714 CONNECTOR(14P)
  • Page 51 Ref. No. Part No. Part Name & Description Pcs Remarks Q702 DTC143XUA106 TRANSISTOR ERDS2FJ102 1/4W 1K ERDS2FJ471 1/4W 470 ERDS2FJ223 1/4W 22K ERDS2FJ101 1/4W 100 ERDS2FJ102 1/4W 1K ERDS2FJ471 1/4W 470 ERDS2FJ222 1/4W 2.2K R21,22 ERDS2FJ100 1/4W 10 ERDS2FJ100 1/4W 10 R155,56 ERDS2FJ473 1/4W 47K...
  • Page 52 Ref. No. Part No. Part Name & Description Pcs Remarks R615 ERDS2FJ182 1/4W 1.8K R616 ERDS2FJ222 1/4W 2.2K R617 ERDS2FJ332 1/4W 3.3K R618 ERDS2FJ472 1/4W 4.7K R619 ERDS2FJ682 1/4W 6.8K R620 ERDS2FJ821 1/4W 820 R621 ERDS2FJ102 1/4W 1K R622 ERDS2FJ122 1/4W 1.2K R623 ERDS2FJ152...

  • Page 53: Cabinet Parts Location

    Ref. No. Part No. Part Name & Description Pcs Remarks S701 RSH1A043-U SW,REST TJ701 EYF8CU JUMMPER X401 RSXY8M00D01T OSCILLATOR X701 RSXB33M8J01T OSCILLATOR 17. Cabinet Parts Location 18. Loading Unit Parts Location...
  • Page 54 F000207900YM/KH...
  • Page 55 CD SERVO P.C.B. CN702 CN701 OPTICAL PICKUP M702 (SPINDLE MOTOR) M701 (TRAVERSE MOTOR) RED MARK CN401 ....CN402 ..
  • Page 56 C Disc select buttons and indicators (DISC, 1–5) Green: Indicates that the tray is ready to play its CD or to be opened. D Random play button (RANDOM) E Repeat button (REPEAT) DIRECT OPEN OPEN/CLOSE DISC 1 DISC 2 DISC 3 DISC 4 DISC 5 DISC...
  • Page 59 AN8839NSBE2 (RF) OPTICAL PICKUP IC701 TJ701 SERVO AMP Semiconductorl RFIN CSBRT aser OFTR RFENV TENV Q701 DET. Vref. Laser OFTR power Vref. drive DET. Vref. /RFDET /RFDET DET. FE IN Vref. Subtracter VCBA FE OUT LDON Photo detector Vref. Vref. VREF VREF Vref.
  • Page 60 MN662790RSA IC702 SERVO PROCESSOR / DIGITAL SIGNAL PROCESSOR DIGITAL FILTER / D/A CONVERTER 79 80 IOSEL CLVS OUTR BLKCK BLKCK R ch /CLDCK SBCK SBCK SUBC SUBC OUTL DEMPH SSEL FLAG SQCK SQCK IPFLAG SUBQ SUBQ Digital audio interface Q702 Switch- PLLF Digital audio...
  • Page 61 JK401 SYNC CD REQ CT.GND Q6,7 D5,6 Regulator +B(10V) D.GND UPC29M33HB SCLK DATA Regulator Q403, Q402 Q4,5 Inter- Inter- D10,12~14 V.GND face face To SOUND Regulator PROCESSOR/ CASSETTE DECK BLOCK DIAGRAM D601~605 (1~5PLAY) D606 R ch CD Rch OUT A.GND 1~3, CD Lch OUT D617...
  • Page 62 This printed circuit board diagram may be modified at any time with the development of new technology. CD SERVO P.C.B. (RF) ELECTRICAL PARTS LOCATION TJ701 Ref. No. Lo. No. Ref. No. Lo. No. CD SERVO P.C.B. RJ734 TP20 TP30 IC701 RJ721 X701 IC702...
  • Page 63 MAIN P.C.B. To SOUND PROCESSOR& ELECTRICAL PARTS LOCATION CASSETTE DECK Ref. No. Lo. No. Ref. No. Lo. No. JK401 MAIN P.C.B. R416 R157 IC451 R419 R158 IC452 R420 R155 R421 R156 D402 R422 R423 A.GND R424 Q401 R425 Q402 R426 Q403 R427 D.GND...
  • Page 64 MOTOR P.C.B. OPERATION P.C.B. D606 W401B S614 S613 S612 (LOADING MOTOR) R621 S611 S615 R620 OPEN/ S616 CLOSE) S601 (DISC5) S602 (DISC4) R612 DIRECT OPEN S603 (DISC3) R614 S604 (DISC2) S605 (DISC1) PLUNGER R601 D617 (REP2578A-N) C603 C604 C605 IC601 S619 ELECTRICAL PARTS LOCATION EDIT...

  • Page 65: Schematic Diagram

    SCHEMATIC DIAGRAM 1 NOTE: CD SERVO CIRCUIT :POSITIVE VOLTAGE LINE :CD SIGNAL LINE The number which noted at the connectors on the schematic diagram as "SCHEMATIC DIAGRAM 1" or "SCHEMATIC DIAGRAM 2" indicates the schematic diagram Q701 serial number located on the left corner 2SB709STX in the schematic diagram.
  • Page 66 SCHEMATIC DIAGRAM 2 :POSITIVE VOLTAGE LINE :CD SIGNAL LINE 3.4V TP23 R717 C727 50V1 C731 6.3V220 PLAY 2.2V C730 1kHz, 0dB TP21 R718 C728 50V1 2.4V L702 3.4V F=33.8688MHz C722 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 3.4V BCLK 1.6V...

  • Page 67: Motor Circuit

    SCHEMATIC DIAGRAM 3 MOTOR CIRCUIT :POSITIVE VOLTAGE LINE TA7291P MOTOR DRIVE 0.6V 7.8V 4.6V 4.6V 0.6V CLUMP SW 0.01 CIRCUIT (LOADING MOTOR) (CLAMP) MTZJ4R7BTA PLUNGER CN401 (TRAY POSITION 2 DET.) BOTTOM SW R443 (TRAY POSITION 1 DET.) CIRCUIT (OPEN DET.) (BOTTOM) RVTDTC143EST MOTOR DRIVE...
  • Page 68 SCHEMATIC DIAGRAM 4 MAIN CIRCUIT :POSITIVE VOLTAGE LINE 10.4V 10.4V Q406 2SB621ARSTA 10.3V PLUNGER DRIVE 4.8V PLAY 10.2V 3.3V Q405 4.7K PLAY UN421FTA 3.3V PLAY PLUNGER DRIVE 26.6ms. CONT. F=75Hz F=75Hz 26.6ms. R436 (0.2V) (0.2V) (4.8V) (3.3V) Q402 4.7K 4.8V 3.3V 4.8V 0.2V...
  • Page 69 SCHEMATIC DIAGRAM 5 :POSITIVE VOLTAGE LINE :CD SIGNAL LINE 2SB1548PQAU +10V REGULATOR 10.4V 2SB621ARSTA 9.6V REGULATOR 1000P 4.8V 7.4V UPC29M33HB 2SC3311ATA REGULATOR REGULATOR 1000P 9.6V 7.9V 7.3V 2SC3311ATA 3.4V REGULATOR 7.4V MA165TA 2.2K D12 14 3.3V MA165TA D12 D13 D14 2.8V MA165TA JK401...
  • Page 70 AN8739SBE2 TC74HCT7007A MN662790RSA1 TA7291P 28PIN AN8839NSBE2 14PIN BU2050F-E2 42PIN M38504M6200F .......

Table of Contents

Save PDF