Technics SL-HD550 Service Manual
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Technics SL-HD550 Service Manual

Technics SL-HD550 Service Manual

Compact disc player
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AD0101018C2
Compact Disc Player
SL-HD550
Traverse Deck: RAE0152Z Mechanism Series
Colour
(N)...........Gold Type
Area
(E)...........Europe.
SPECIFICATIONS

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  • Page 1 AD0101018C2 Compact Disc Player SL-HD550 Traverse Deck: RAE0152Z Mechanism Series Colour (N)...Gold Type Area (E)...Europe. SPECIFICATIONS...
  • Page 2 B Disc tray C Disc tray open/close button ( 0 OPEN/CLOSE) D Random play button (RANDOM) E Repeat button (REPEAT) F CD edit button (EDIT) G Skip/search buttons (4/1, ¡/¢) OPEN/CLOSE H Stop button ( 7 ) I Pause button ( 8 ) RANDOM REPEAT EDIT...
  • Page 3 Accessories and Packaging. 2. Before Repair This equipment (SL-HD550), which is a component of the system, is supplied with power from the Amplifier (SE-HD550) through the Tuner (ST-HD550). When repairing this equipment or checking operation of the system, be sure to connect to other systemcomponents with it.
  • Page 4 (optical pickup). 3.1. Handling of traverse deck (optical pickup) 1. Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock. 2. To protect the laser diode against electrostatic breakdown, short the flexible board (FFC board) with a clip or similar object.
  • Page 5 Refer to Fig. 3-2. Fig. 3-2. 3.2.2. 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. 3-3. Fig. 3-3.
  • Page 6 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 traverse deck (optical pickup). 4. Precaution of Laser Diode 5. Location of Controls 6. Operation Checks and Component Replacement Procedures...
  • Page 7 This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required. 6.1. Checking for the main P.C.B.
  • Page 8 Check the main P.C.B. as shown below.
  • Page 9 6.2. Checking for the CD servo P.C.B. Follow the (Step 1) - (Step 3) of item 6.1.
  • Page 11 Check the CD servo P.C.B. as shown below.
  • Page 12 6.3. Replacement for the traverse deck ass’y Follow the (Step 1) - (Step 3) of item 6.1. Follow the (Step 1) - (Step 5) of item 6.2.
  • Page 26 6.4. Replacement for the belt, loading motor ass’y and loading switch Follow the (Step 1) - (Step 3) of item 6.1. Follow the (Step 1) - (Step 5) of item 6.2. Follow the (Step 1) - (Step 9) of item 6.3.
  • Page 29 7. 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 (ST-HD550). It also has a servo adjustment function for displaying the status of servosystem functions (Focus, Tracking, CLV servo) on the FL display of the tuner.
  • Page 30 7.2. Servo adjustment procedure 7.3. Error code based on troubleshooting This unit is satisfactory if the error code is E00 . Before testing, check that the test disc is free of scratches and optical pickup is clean.
  • Page 31 Symptom Probable cause Signal to check Normal voltage and error waveform values code Signal Location PLAY STOP display name Focus and MDATA IC702-pin 8 Clocks X1 IN and X2 OUT, tracking power supply V DD and reset/ offset RST, all on IC702. adjustments MDATA, MCLK and MLD MCLK IC702-pin 7...
  • Page 32 E08, Focus or IC702-pin 1.7 V Scratches or contaminants on Tracking disc surface. gain Focus and Tracking servo adjustments circuit. (check waveforms, IC702-pin 1.7 V voltages and part values.) completed in Optical pickup. specified IC702-pin time period. 8. To Supply Power Source This unit is designed to operate on power supplied from system connected.
  • Page 33 S791: Disc Tray close detect switch in OFF position S801: Disc tray open/close switch OPEN/CLOSE) S802: Pause switch ( S803: F.Skip/search switch ( S804: Play switch ( S805: Stop switch ( S806: R.Skip/search switch ( S807: CD edit switch (EDIT) S808: Repeat switch (REPEAT) S809:...
  • Page 34 DC electronic circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist some errors in the voltage values, depending on theinternal 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 important for...
  • Page 35 AN8839NSBE2 (RF) IC701 OPTICAL PICKUP TJ701 SERVO AMP SEMICONDUCTOR RFIN CSBRT LASER OFTR RFENV TENV DET. Q701 Vref. LASER OFTR POWER Vref. DRIVE DET. Vref. /RFDET /RFDET DET. FE IN A CH Vref. SUBTRACTER VCBA FE OUT LDON PHOTO DETECTOR Vref.
  • Page 36 MN662790RSC IC702 SERVO PROCESSOR / DIGITAL SIGNAL PROCESSOR DIGITAL FILTER / D/A CONVERTER 79 80 IOSEL CLVS OUTR BLKCK BLKCK /CLDCK SBCK SBCK SUBC SUBC OUTL DEMPH SSEL FLAG SQCK SQCK IPFLAG SUBQ SUBQ DIGITAL AUDIO INTERFACE Q702 SWITCH- PLLF DIGITAL AUDIO INTERFACE PLLF2...
  • Page 37 Q405,500 JK401 +13V REGULATOR +B(13V) /STABILIZER CD REQ M GND +B(5V) C0CAABE00007 D.GND IC401 REGULATOR DATA To TUNER (ST-HD550)/ CASSETTE DECKREQ DECK Q401, (RS-HD550) SYNC Q404 Q403 BLOCK DIAGRAM INTERFACE INTERFACE INTERFACE RS A.GND GP1FA550TZ IC402 TRANSMISSION MODULE DIGITAL CD Rch OUT OPTICAL OUT A.GND CD Lch OUT...
  • Page 38 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 39 SCHEMATIC DIAGRAM-2 :POSITIVE VOLTAGE LINE :CD SIGNAL LINE 3.3V TP23 R717 C727 50V1 C731 10V220 PLAY 2.4V C730 1kHz, 0dB TP21 R718 C728 50V1 1.9V L702 3.3V F=33.8688MHz C722 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 PLAY 3.3V 3.3V...

  • Page 40: Table Of Contents

    SCHEMATIC DIAGRAM-3 LOADING MOTOR CIRCUIT MAIN CIRCUIT :POSITIVE VOLTAGE LINE IC790 TA7291S MOTOR DRIVE 7.9V 5.2V 3.3V 5.1V 7.9V 0.7V 7.9V 7.9V 0.7V 7.9V 5.1V CP790 CN401 LOADING MOTOR M I G H OPERATION CIRCUIT R804 R803 R802 R801 R800 1.2K 1.5K 2.2K...

  • Page 41: Schematic Diagram-3

    SCHEMATIC DIAGRAM-4 :CD SIGNAL LINE :POSITIVE VOLTAGE LINE Q405 2SB1417PQTA +13V REGULATOR R101 0.22 7.9V 15.8V E401 C413 R500 IC401 8.5V 0.01 C0CAABE00007 REGULATOR Q500 2SC4081STX 5.2V 8.5V STABILIZER 14.5V D501 MA111TX 6.5V 3.3V JK401 R440 +B(13V) 4.7K CD REQ R439 M.GND R452...

  • Page 42: Ta7291S

    AN8739SBE2 TA7291S AN8839NSBE2 28PIN MN662790RSC GP1FA550TZ C0CAABE00007 42PIN C2BBFD000248 ........

  • Page 43: Cp790

    CD SERVO P.C.B. (RF) TJ701 RJ734 TP30 TP20 X701 TP23 C717 TP19 TP21 R714 C716 TP29 C721 C722 C744 C725 C724 C723 RJ714 Q702 IC701 C731 C753 TP22 25 28 C760 CN702 C711 C754 RJ702 C712 IC702 C718 C713 RJ712 L702 R705 RJ703...

  • Page 44: D801

    OPERATION P.C.B. MAIN P.C.B. W801 S809 (RANDOM) CN403 R474 R472 S808 (REPEAT) Q408 R244 R471 R243 R473 R239 Q409 R240 R242 R241 RJ504 S807 IC201 C242 (EDIT) R245 X201 R201 D222 RJ503 R452 R101 +13V Q404 Q403 RJ501 R451 Q401 R440 RJ502 R458...
  • Page 45 DIGITAL LOADING To TUNER & OPTICAL CASSETTE DECK MOTOR P.C.B. CN401 CP790 CN403 WHITE CN402 MAIN P.C.B. 23 ..1 22 ..2 2 .

  • Page 48: Ic201 C2Bbfd000248

    11. Printed Circuit Board Diagram 12. Type Illustration of ICs, Transistors and Diodes 13. Wiring Connection Diagram 14. Block Diagram 15. Troubleshooting Guide 16. Terminal Function of ICs 16.1. IC201 (C2BBFD000248): System Control...
  • Page 49 Function Terminal Name Power supply terminal V cc VREF Reference voltage input GND terminal AV SS SYNC Power failure detect signal input SUBQ Sub-code Q data signal input SQCK Sub-code Q resistor clock signal output 7 BLKCK Sub code block clock signal input B REQ Serial communication request...
  • Page 50 27 MDATA Command data signal output Function Terminal Name 28 MCLK Command clock signal output Command load signal output 30 STATUS Status signal input Not used, open 33 REST REST detect switch signal input Not used, open 37 OPEN Disc tray open detect switch signal input Not used, open 39 H:CR2...
  • Page 51 Function Terminal Name HPF-AMP capacitor connection terminal Dropout detection control 13 LDON LD APC ON/OFF (H: ON) GND terminal 15 /RFDET RF detect signal output (L: detect) 16 PDOWN Power down terminal 17 OFTR Off track detection (H: detect) Not used, open Envelope signal output Not used, open Tracking error signal input...
  • Page 52 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) 4 DV DD 1 Power supply terminal 5 DV SS 1 GND terminal Digital audio interface signal output MCLK...
  • Page 53 (Forced mode)
  • Page 54 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 29 VREF D/A drive output normal voltage input 30 FBAL Focus balance adj. output 31 TBAL Tracking balance adj.
  • Page 55 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 V SS X1 IN Crystal oscillator terminal (f= 33.8688 MHz) 59 X2 OUT Power supply terminal V DD 61 BYTCK Byte clock signal (Not used,...
  • Page 56 Function Terminal Name 79 MSEL Output frequency select signal input (Connected to GND) SSEL SUBQ output mode select signal input (Not used, connected to V DD ) 16.4. IC703 (AN8739SBE2): Focus Coil/Tracking Coil/ Traverse Motor/Spindle Motor Drive...
  • Page 57 Function Terminal Name /RST Not used, open Not used Motor driver 2 input Turntable motor drive signal input (L: ON) Not used Motor driver 1 input 7 PV CC 1 Driver power supply terminal 1 8 PGND1 Driver GND terminal 1 Not used, connected to GND Traverse motor driver 1 output terminal (-)
  • Page 58 Notes: 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 59 Ref. No. Part No. Part Name & Description Remarks RAE0152Z-1 TRAVERSE DECK ASS'Y 105-1 SHGD113-1 FLOATING RUBBER 105-2 SNSD38 SCREW 105-3 RAF0150A-1 OPTICAL PICKUP 105-4 RDG0247 DRIVE GEAR 105-5 RDG0248 INTERMEDIATE GEAR 105-6 RXQ0339 TRAVERSE MOTOR ASS'Y 105-7 RXQ0304-1 PLATE 105-8 XQN17+CG5 SCREW...
  • Page 60 Ref. No. Part No. Part Name & Description Remarks C707 ECUV1E273KBN 25V 0.027U C710 ECUV1H121KCN 50V 120P F1J1H121A507 C711,12 ECUVNE104ZFN 25V 0.1U F1J1E1040017 C713 ECUVNE104MBN 16V 0.1U F1J1C104A065 C714 ECEA0JKS101 6.3V 100U C715 ECUV1H272KBN 50V 2700P F1J1H272A592 C716 ECUV1H821KBN 50V 820P C717 ECUVNE104ZFN 25V 0.1U...
  • Page 61 Ref. No. Part No. Part Name & Description Remarks IC402 GP1FA550TZ B3ZAZ0000008 IC701 AN8839NSBE2 AN8839NSB-E2 IC702 MN662790RSC IC703 AN8739SBE2 AN8739SBTE2 IC790 TA7291S C0GAL0000001 JK401 RJT065K19 SYSTEM(19P) K1FA219B0001 L701,02 RLBN102V-Y COIL J0JBC0000041 PCB1 REP3121AA-S MAIN P.C.B. [RTL] PCB2 REP3121AB-S PANEL P.C.B. [RTL] PCB11 REP1960A...
  • Page 62 Ref. No. Part No. Part Name & Description Remarks R451 ERJ6GEYJ472V 1/10W 4.7K R452 ERJ6GEYJ272V 1/10W 2.7K R453 ERJ6GEYJ472V 1/10W 4.7K R455,56 ERJ6GEYJ102V 1/10W 1K R458 ERJ6GEYJ102V 1/10W 1K R459,60 ERJ6GEYJ224V 1/10W 220K R471-74 ERJ6GEYJ330V 1/10W 33 R500 ERJ6GEYJ223V 1/10W 22K R501 ERJ6GEYJ331V 1/10W 330...
  • Page 63 Ref. No. Part No. Part Name & Description Remarks S701 RSH1A043-U SW,REST K0J1BB000022 S790 RSH1A005 SW,OPEN DET. K0J1BB000010 S791 RSH1A005 SW,CLOSE DET. K0J1BB000010 S801-09 EVQ11G05R SW,PUSH X201 EF0MC6004T4 OSCILLATOR X701 RSXB33M8J01T OSCILLATOR 18. Cabinet Parts Location 19. Loading Unit Parts Location F010100000YM/KH 2001 Matsushita Electric Industrial Co., Ltd.

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