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JVC MX-S6MD Service Manual

Compact component md system
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SERVICE MANUAL
COMPACT COMPONENT MD SYSTEM
SP-MXS6MD
Contents
Safety Precautions
Flow of functional operation
until TOC read (MD section)
MX-S6MD
CA-MXS6MD
1-2
1-3
1-4
1-5
1-31
1-37
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
SP-MXS6MD
Area Suffix
US
UB
UT
MX-S6MD
Singapore
Hong Kong
Taiwan
1-38
1-38
1-39
1-40
1-40
1-40~69
No.20887
Nov. 2000

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Summary of Contents for JVC MX-S6MD

  • Page 1: Table Of Contents

    MX-S6MD SERVICE MANUAL COMPACT COMPONENT MD SYSTEM MX-S6MD SP-MXS6MD CA-MXS6MD SP-MXS6MD Area Suffix Singapore Hong Kong Taiwan Contents Safety Precautions Maintenace of laser pickup (MD) 1-38 Preventing static electricity Replacement of laser pickup (MD) 1-38 Important for laser products Flow of functional operation...
  • Page 2 MX-S6MD 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits.

  • Page 3: Preventing Static Electricity

    MX-S6MD Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.1. Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD/MD players.

  • Page 4: Important For Laser Products

    MX-S6MD Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam.

  • Page 5: Disassembly Method

    MX-S6MD Top cover Disassembly method <Main body> Removing the top cover (See Fig. 1 and 2) Remove the four screws A on the back of the body. Remove the two screws B on both sides of the body. Lift up the rear part of the top cover while pulling both sides, then remove the top cover.
  • Page 6 MX-S6MD Front panel assembly Joint Removing the font panel assembly (See Fig.6 to 8) Prior to performing the following procedure, remove the top cover. Disconnect the wire from connector CN603 on the input board and the card wire from CN801 on the microcomputer board.
  • Page 7 MX-S6MD Removing the MD changer mechanism (See Fig.11 to 13 ) Prior to performing the following procedure, remove the top cover and the CD changer mechanism assembly. Disconnect the card wire from connectors CN511 on the main board. Remove the four screws I on both sides of the body.
  • Page 8 MX-S6MD CN111 CN112 Removing the tuner board Rear cover (See Fig.15 and 16) Prior to performing the following procedure, remove the top cover. Disconnect the wire from connector CN111 and CN112 on the tuner board. Remove the screw J on the side of the body...
  • Page 9 MX-S6MD Heat sink assembly Removing the heat sink assembly (See Fig.19 and 20) Bracket Prior to performing the procedure, remove the top cover, the CD changer mechanism assembly, the rear cover, the rear panel, the tuner board and the input board.
  • Page 10 MX-S6MD CN911 Removing the Main board (See Fig.22) Main board Prior to performing the procedure, remove the top CN991 cover, the CD changer mechanism assembly, the rear cover, the rear panel, the tuner board, the input board and the heat sink assembly.
  • Page 11 MX-S6MD Removing the voltage selector Joint (See Fig.26) Plastic rivet Prior to performing the following procedure, remove the top cover and the rear cover. Remove the plastic rivet retaining the voltage selector. Disengage the joint f to release the voltage selector from the transformer bracket.
  • Page 12 MX-S6MD (Bottom) <MD section> Removing the main board Main board (See Fig.1 and 2) Turn over the body and disconnect the card wire from connector CN408 and the flexible wire from CN408 CN407 on the main board. Remove the two screws A attaching the main board.
  • Page 13 MX-S6MD Removing the head lifter (See Fig.4 to 6) Move the head lifter on top of the body in the Head lifter direction of the arrow and turn around. Detach the spring from the hook of the body. Remove the head lifter with the spring.
  • Page 14 MX-S6MD Removing the Loading assembly (See Fig.8 and 9) Ref: The loading assembly, the traverse mechanism assembly and the single flame will be removable after removing the loading assembly from the body. Loading assembly Prior to performing the following procedure, remove the main board, the mechanism cover, the head lifter and the head assembly.
  • Page 15 MX-S6MD Slide base (R) <Loading assembly> Removing the slide base (L) / (R) (See Fig.10) Remove the two screws E on the upper side of the loading assembly. Remove the slide base (L) outward. (Release it from the joint bosses E.) Slide base (L) Remove the slide base (R) outward.
  • Page 16 MX-S6MD Removing the cartridge holder assembly (See Fig.14 and 15) Remove the two screws I on the upper side of the Slide bar loading assembly. Cartridge holder assembly Eject bar Eject bar Part g Removing the slide bar and the eject bar Fig.14...
  • Page 17 MX-S6MD <Traverse mechanism assembly> Insulators Removing the Insulators (See Fig.16) Pickup unit Disengage the four insulators from the notches of the traverse mechanism chassis. Insulators Traverse machanism chassis Fig.16 Joint h Pickup guide Removing the pickup unit (See Fig.17) Turn over the traverse mechanism assembly and remove the screw J attaching the shaft holder (F).
  • Page 18 MX-S6MD Removing the feed motor assembly (See Fig.19-1, 19-2) Traberse mechanism board Soldering j It is not necessary to remove the pickup unit. For the white and black harnesses extending from the feed motor assembly, unsolder the soldering i on the traverse mechanism board.
  • Page 19 MX-S6MD <Reattaching the loading assembly> Reattach the eject bar to the UD base. (Fig.15 and 20) Reattach the slide bar to the loading mechanism chassis while fitting the boss marked k to the eject bar slot. (Fig.20) Slide the slide bar and the eject bar in the direction of the arrow in Fig.20 and reattach the cartridge...
  • Page 20 MX-S6MD Reattach the wire holder to the UD base while engaging the UD base hook marked u to the wire holder slot marked t (At the same time, the boss on the reverse side of the wire holder is fitted to the UD base round hole).
  • Page 21 MX-S6MD Reattach the UD base while engaging the four pins on both sides of the UD base to the notches of the loading mechanism base and placing the edge (marked e’) of the cartridge holder assembly under the hook e of the loading mechanism base. (Fig.23)
  • Page 22 MX-S6MD <CD mechanism section> Removing the servo control board (See Fig.1 to 4) ATTENTION: Make sure the sub chassis unit is locating at the lowest position. If not,perform the following procedure from 1 to 3. Insert a screwdriver into the sub chassis slot on the...
  • Page 23 MX-S6MD Top cover Removing the tray unit (See Fig.5 to 8) The tray unit can be removed despite the position of the sub chassis unit, but the lowest position is recommended to expedite the work. Remove the four screws B attaching the top cover on the top of the body.
  • Page 24 MX-S6MD Removing the side unit (L) and (R) Joint h Side unit (R) (See Fig.9-1 to 9-5) Select arm Prior to performing the following procedures, remove the servo control board, the top cover and the tray Joints e unit. Remove the two screws C attaching the side unit (L).
  • Page 25 MX-S6MD Removing the sub chassis unit (See Fig.10 to 12) Prior to performing the following procedures, remove the servo control board, the top cover, the tray unit, the side unit (L) and the side unit (R). Turn the hook gear counterclockwise to move the...
  • Page 26 MX-S6MD Flap base unit Removing the flap base unit and the gear Joint tab j Joint tab i base unit (See Fig.13 and 14) Prior to performing the following procedures, remove the servo control board, the top cover, the tray unit, the side unit (L) and the side unit (R).
  • Page 27 MX-S6MD Top cover Removing the pickup (See Fig.16 to 20) From the top of the body, remove the three screws H attaching the clamper base unit. Remove the clamper base unit with the two rods attached to the clamper base unit and the top cover.
  • Page 28 MX-S6MD Removing traverse mechanism Joint o assembly (See Fig.21) Prior to performing the following procedure, remove the servo control board and the clamper base unit. Remove the three screws K attaching the traverse mechanism assembly. Detach the rear part of the traverse mechanism assembly upward to release the joint o with the sub chassis unit.
  • Page 29 MX-S6MD Ornament grille Tweeter <Speaker section> Information This is a method of dis assembly. As parts of the repair of this speaker Woofer Boss system, it is only the speaker box assemblies. It is not possible to supply with each part unit.
  • Page 30 MX-S6MD Removing the speaker (tweeter) (See Fig.4 and 5) Ornament grille Insert a screwdriver under the ornament grille and Driver remove it from the body. Tweeter ATTENTION: As the ornament grille is damaged, replace it with the tweeter. Remove the three screws B and the tweeter from the body.

  • Page 31: Adjustment Method

    MX-S6MD 3.Laser power adjustment Adjustment method Insert the sensor This model is auto adjust system. of laser power meter Press [ 2 key ] of MD TEST MODE 1 Remote controller 1.Setting the TEST MODE1 LCD indication L.POWER PLAY (CAUTION) MD mode should NO DISC condition, when POWER ON to not read TOC.
  • Page 32 MX-S6MD 4.Disc adjustment This adjustment should done after laser power adjustment. Insert Pre-master disc Complete TOC read [CAUTION] Please push the [STOP key] to remote control when the Press [MD key] of LCD display becomes [NG ERROR], and push the the Remote controller key] to remote control again.
  • Page 33 MX-S6MD 5.Independent operation mode Operation key MODE In case the checking mode or adjustment Remote controller [SLEEP] Focus search [FOCUS_SEARCH] when occur the error at disc adjustment, Remote controller [6 key] Pit rough servo [P.R.SERVO] Independent mode into by select the key...
  • Page 34 MX-S6MD CD TEST MODE CD section is no need the adjustment by design. 1.Setting the TEST MODE Press [STOP key] and [HIGH SPEED CD MD REC key] of the main body together and connect the power cord LCD indication CD TEST MODE...
  • Page 35 MX-S6MD LCD ALL INDICATION, TIME COMPRESSION TEST MODE 1.Setting the TEST MODE POWER ON Press [POWER key],[1 key] and [STOP key] together of the Remote controller (1st time) LCD and LED are all ON (press any key) Change to normal indication...
  • Page 36 MX-S6MD RUNNING MODE This running mode is a mode by which the recording is compulsorily deleted with ALL-ERASE after U-TOC is written when the recording of MD ends, and the recording is repeated again. This TEST MODE is continue recording (loop recording), it is for recording stop when MD end.
  • Page 37 MX-S6MD Flow of functional operation until TOC read (MD section) Power ON MD play Key Check point Slider turns REST Confirm that the voltage switch ON at the pin 9 of CN408 are Mechanism operation ON Confirm that the voltage Laser ON at the pin 50 of IC500 are 4V.

  • Page 38: Maintenace Of Laser Pickup (Md)

    MX-S6MD Maintenance of laser pickup Replacement of laser pickup (MD) (MD) Change the MD pickup by referring to 1. Cleaning of pickup lens "Removing the MD pickup" in the (1) Prior to changing the pickup, clean the pickup lens. disassembly method.

  • Page 39: Flow Of Functional Operation Until Toc Read (Cd Section)

    MX-S6MD Flow of functional operation until TOC read (CD section) Check Point REST switch to ON Power ON Disc play Key Check that the voltage at by slider the pin33 of IC701 or pin3 of CN694 is 0V(a moment)? TE offset auto adjust...

  • Page 40: Maintenance Of Laser Pickup (Cd)

    MX-S6MD Maintenance of laser pickup Replacement of laser pickup (CD) (CD) (1) Cleaning the pickup lens Turn of the power switch and, disconnect the Before you replace the pickup, please try to power cord from the AC outlet. clean the lens with a alcohol soaked cotton swab.

  • Page 41: Description Of Major Ics

    MX-S6MD Description of major ICs AK4519VF-X (IC480) : A / D D / A converter 1.Pin layout 2.Block diagram VA AGND VB VD DGND Decimation AINL Clock MCLK Modulator VCML Filter Divider CMODE AINR Decimation LRCK Modulator VCMR SCLK Filter...
  • Page 42 MX-S6MD AN8849SB-W (IC601) : Head amp 1.Pin layout 2.Block diagram OFTR Substraction FBAL GCTRL Substraction TBAL 1-42...
  • Page 43 MX-S6MD 3.Pin Function Symbol Function Photo detector signal input. Laser diode drive terminal. RF amp negative input terminal. Vcc1 Power supply terminal. RFOUT Equaruzer connect terminal. EQSW Power supply terminal. Vcc2 RF AGC input terminal. RF AGC filter connect terminal.
  • Page 44 MX-S6MD CXA2523AR (IC310) : MD servo 1.Block diagram ADIP Amp TE/SE Amp PEAK 3TADJ FE Amp RFAGC 22 EQADJ AGCI 21 VREF COMPO 20 F0CNT COMPP 19 XSTBY ADDC 18 XLAT 17 SCLK Command I/F 16 SWDT 15 TEMP R...
  • Page 45 MX-S6MD Symbol Function Pin No. Reference voltage output. VREF Equalizer center frequency setting pin. EQADJ BPF3T center frequency setting pin. 3TADJ Power supply. BPF22 center frequency setting pin. WBLADJ Tracking error signal output. Connects the sled error signal LPF capacitor.
  • Page 46 MX-S6MD CXD2662R (IC350) : DSP 1.Pin layout 2.Block diagram 16 17 18 29 27 28 90 52 CLOCK FILI XRAS GENERATOR FILO XCAS CLTV EFM / ACIRC each block ENCODER / DECODER A00~A11 COMP D0~D3 XINT SHOCK RESISTANT ASYI MEMORY CONTROLLER...
  • Page 47 MX-S6MD 3.Pin function Symbol Function Pin No. MNT0 Monitor output. MNT1 Monitor output. MNT2 Monitor output. MNT3 Monitor output. SWDT Data input for microcomputer serial interface. SCLK Shift clook input for microcomputer serial interface. XLAT Latch input for microcomputer serial interface.Latched at the falling edge.
  • Page 48 MX-S6MD Symbol Function Pin No. XCAS External DRAM CAS output. External DRAM address output. XRAS External DRAM RAS output. External DRAM write enable. External DRAM data bus. External DRAM data bus. External DRAM data bus. External DRAM data bus. MDDTI MD-DATA mode 1 switching input.
  • Page 49 MX-S6MD Symbol Function Pin No. SRDR Sled servo drive PWM output. ( ) SFDR Sled servo drive PWM output. (+) SPRD Spindle servo drive output. (PWM ( ) or polarty) SPFD Spindle servo drive output. (PWM (+) or PWM absolute value) FGIN Spindle CAV servo FG input.
  • Page 50 MX-S6MD HD6432345A15FA (IC500) : MD servo control 1.Pin layout 2.Pin function (1 / 2) Symbol Function PIN No. I/O Data input for EEPROM. Data input for EEPROM. Clock output for EEPROM. Chip select for EEPROM 1. STSRDY Non connected. Non connected.
  • Page 51 MX-S6MD 2.Pin function(2/2) Pin No. Symbol Function COMM IN Common in control signal input terminal COMM CLOCK Common clock signal output terminal COMM PANEREQ Common panel regulator signal output terminal COMM RESET Common reset signal output terminal TUNER DATA INPUT...
  • Page 52 MX-S6MD MN662748RPM (IC651) : Digital servo & digital signal processer 1. Pin layout 20 ~ 41 ~ 2.Block diagram AVSS1 LRCKIN(MSEL) 8TIMES AVDD1 BCLK(SSEL) DIGITAL OVER SAMPUNC OUTR SRDATAIN DEEMPHSIS 1BIT DIGITAL FILTER (PSEL) LOGIC IOSEL CLVS BLKCK OUTL CLDCK...
  • Page 53 MX-S6MD 3. Pin function Dymbol I/O Function Symbol I/O Function Tracking error shunt signal output (H:shunt) BCLK Not used Not used LRCK PLAY Not used SRDATA WVEL Not used Not used DVDD1 Power supply (Digital) RF signal input DVSS1 Connected to GND...
  • Page 54 MX-S6MD UPD780024AGKB08 (IC251) : Unit micon 1. Pin layout 2. Pin function (1/2) Symbol Function E2SCK EEPROM serial clock output E2SDL EEPROM serial data I/O Synchronization / asynchronous system MRDY Ready signal input terminal ITRVP3 Tray play position 3 ITRVP2...
  • Page 55 MX-S6MD 2. Pin function (2/2) Symbol Function TRY1CLOSE Tray 1 close signal input AVREF Reference power supply voltage AVDD Reference power supply voltage /RESET CD reset signal input Non connect Reference power supply voltage No use ( for Flash micon)
  • Page 56 MX-S6MD AK93C65AF-X (IC590) : EEPROM 1.Pin layout 8 PIN SOP 2.Block diagram DATA REGISTER R/W AMPS AUTO ERASE EEPROM INSTRUCTION REGISTER INSTRUCTION DECODE, CONTROL 4096bit 256 x 16 CLOCK ADD. DECODER GENERATION BUFFERS VPP SW VREF GENERATOR 3.Pin function Pin no.
  • Page 57 MX-S6MD BR24C01AFV-W-X (IC201) : EEPROM 1.Pin layout 2.Block diagram 1kbit EEPROM ARRAY 8bit 7bit SLAVE/WORD ADDRESS DATA 7bit DECODER ADDRESS REGISTER REGISTER START STOP CONTROL LOGIC HIGH VOLTAGE GEN. Vcc LEVEL DETECT 3.Pin function Pin name Function Power supply Ground (0v)
  • Page 58 MX-S6MD HY51V17400CT-60 (IC390) : DRAM 1.Pin layout 2.Pin function Pin Name Parameter /RAS Row Address Strobe /CAS Column Address Strobe Write Enable Output Enable A0~A11 Address Input (4K Refresh Product) A0~A10 Address Input (2K Refresh Product) DQ0~DQ3 Data In/Out Power (3.3V)
  • Page 59 MX-S6MD LA1838 (IC102): FM AM IF AMP&detector, FM MPX decoder 1. Block Diagram DECODER RF.AMP ANIT-BIRDIE MUTE BUFF STEREO P-DET AM IF PILOT 384KHz COMP S-METER AM/FM S-CLRVE S-METER IF-BUFF TUNING STEREO DRIVE DRIVE FM IF 2. Pin Function Symbol...
  • Page 60 MX-S6MD LA6541-X (IC801) : Servo driver 1. Pin Layout & block diagram Vref Vin4 Vin3 Level B T L B T L Level RESET shift driver driver shift Level B T L B T L Level Regulator shift driver driver...
  • Page 61 MX-S6MD LC72136N (IC121) : PLL frequency synthesizer 1. Pin layout FM/AM LPFOUT LPFIN CLOCK FM/ST/VCO FMIN AM/FM AMIN IFCONT SDIN IFIN 2. Block diagram Phase Reference Detector Driver Charge Pump Swallow Counter Swallow Counter 1/16,1/17 4bit 1/16,1/17 4bit Unlock Detector...

  • Page 62: Block Diagram

    MX-S6MD M63008FP-X (IC410) : 5ch Actuator driver 1.Pin layout CH3IN REG+ OUT3 REGB IN3- IN1+ VBS2 VBS1 IN3+ IN1- OUT1 VM1- VM3- VM1+ VM3+ VM2+ VM4+ VM2- VM4- OUT2 VM5+ IN2- VM5- IN2+ OUT5 MUTE1 IN5- IN5+ MUTE2 IN4+ SS,GND...
  • Page 63 MX-S6MD MN101C12GDW (IC851) : Panel micon 1.Pin layout 2. Pin function Function Symbol Pin No. Connect to ground. LEVEL Lch Input terminal. LEVEL Rch Input terminal. Connect to ground. A / D Power A / D Ref. voltage. Ref. voltage.
  • Page 64 MX-S6MD NJM4580D (IC652) : LPF, Mic and H.phone Amp. 1.Terminal layout A OUT A -IN B OUT A +IN B -IN B +IN (TOP VIEW) 2.Block diagram INPUT OUTPUT NJM4580E-W (IC672): A OUT 1 8 V+ A -IN 2 7 B OUT...
  • Page 65 MX-S6MD STK402-030 (IC301) : 1.Pin layout 2.Block diagram TR11 TR14 TR15 TR12 TR10 TR13 TR16 14 15 1-65...
  • Page 66 MX-S6MD TC74HC02AP (IC674) : 2ch Nor gate 1.Pin layout & block diagram 2.The truth value table TC7S08F-W (IC340) : Buffer 1. Pin layout 2. Block diagram IN B IN A OUT X TC7S32F-X (IC603) : NAND gata 1.Pin layout 2.Block diagram...
  • Page 67 MX-S6MD TDA7439 (IC671) : Control volume 1.Pin layout DIG GND TREBLE(R) AGND TREBLE(L) ROUT MIN(L) LOUT MOUT(L) R-IN4 BOUT(L) R-IN3 BIN(L) R-IN2 BOUT(R) R-IN1 BIN(R) L-IN1 MOUT(R) L-IN2 MIN(R) L-IN3 L-IN4 MUXOUTR MUXOUTL TDA7439 2.Block diagram L-IN1 SPEAKER LOUT MIDLE...
  • Page 68 MX-S6MD TK11140SC-W (IC485) : 1.Pin layout on / off control 1 6 Vin GND 2 Np (Vref) 3 4 Vout 2.Block diagram VOUT Thermal Sensor Rin=550k on / off Ccont. Bandgap Reference UPC393G2-W (IC602) : 1.Pin layout 2.Block diagram 100 A...
  • Page 69 MX-S6MD XC62ER3602M-X (IC400) : 1.Pin layout 2.Block diagram Current Limit Voltage Reference 3.Pin function Pin No. Symbol Function Power supply input Regulator output Base current control terminal Chip enable 1-69...
  • Page 70 MX-S6MD VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan No.20887 200011(O)

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