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JVC UX-Z7MDR Service Manual
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JVC UX-Z7MDR Service Manual

Micro component md system
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SERVICE MANUAL
MICRO COMPONENT MD SYSTEM
02
2003
22042
1
Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2
Disassembly Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3
Adjustment method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-44
UX-Z7MDR
TABLE OF CONTENTS
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
UX-Z7MDR
Area Suffix
E -------- Continental Europe
No.22042
2003/02

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Summary of Contents for JVC UX-Z7MDR

  • Page 1 UX-Z7MDR SERVICE MANUAL MICRO COMPONENT MD SYSTEM 22042 2003 UX-Z7MDR Area Suffix E -------- Continental Europe TABLE OF CONTENTS Important Safety Precautions ............1-2 Disassembly Method.

  • Page 2: Important Safety Precautions

    UX-Z7MDR SECTION 1 Important Safety Precautions 1.1 Safety Precautions (1) This design of this product contains special hardware and exposed metal part and a known good earth ground. many circuits and components specially for safety purposes. Measure the AC voltage across the resistor with the AC For continued protection, no changes should be made to the voltmeter.
  • Page 3 UX-Z7MDR 1.5 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.

  • Page 4: Laser Product

    UX-Z7MDR 1.8 Important for laser products (1) CLASS 1 LASER PRODUCT (5) CAUTION : If safety switches malfunction, the laser is able (2) DANGER : Invisible laser radiation when open and inter to function. lock failed or defeated. Avoid direct exposure to beam.

  • Page 5: Disassembly Method

    UX-Z7MDR SECTION 2 Disassembly Method 2.1 Main body Matal cover 2.1.1 Removing the metal cover (See Fig.1 to 3.) (1) Remove the six screws A on the rear part of the main body that attach the metal cover. (2) Remove the two screws B on each side of the main body that attach the metal cover.
  • Page 6 UX-Z7MDR 2.1.2 Removing the CD mechanism assembly Amp board CD mechanism ass'y (See Fig.4 to 7.) CN302 • Prior to this procedure, remove the metal cover. (1) Remove the card wire from the connector CN302 on amp board on the left side of the main body.
  • Page 7 UX-Z7MDR 2.1.3 Removing the front panel FL connect board (See Fig.8 to11.) CN452 • Prior to this procedure, remove the metal cover and the CD mechanism assembly. Front panel ass'y (1) Remove the card wire from the connector CN705 on micon board, in the center of the right side of the main body.
  • Page 8 UX-Z7MDR 2.1.4 Removing the tuner board Tuner doard (See Fig.12.) • Prior to this procedure, remove the metal cover. (1) Remove the card wire on the right side of the main body from the connector CN1 on the tuner board.
  • Page 9 UX-Z7MDR 2.1.7 Removing the rear panel (See Fig.17 to 20.) • Prior to this procedure, remove the metal cover, the CD mech- anism assembly, and the rear cover. (1) Remove the wire from the connector CN603 on MD con- nect board on the right side of the main body.
  • Page 10 UX-Z7MDR 2.1.8 Removing the MD mechanism assembly MD connect board (See Fig.21 and 22.) MD mechanism ass'y CN601 • Prior to this procedure, remove the metal cover, the CD mech- anism assembly, and the rear cover. (1) Remove the card wire from the connector CN601 on the MD connect board in the rear part of the MD mechanism assembly.
  • Page 11 UX-Z7MDR 2.1.10 Removing the amp board and heat sink CN303 (See Fig.25 and 26.) CN304 • Prior to this procedure, remove the metal cover, the CD mech- Amp board CN305 anism assembly, the front panel assembly, and the rear cover.
  • Page 12 UX-Z7MDR 2.1.12 Removing the MD base chassis/the micon board MD mechanism ass'y MD base chassis (See Fig.28 to 30.) • Prior to this procedure, remove the metal cover, the CD mech- anism assembly, the front panel assembly, the rear cover, the amp board, and the MD connect board.
  • Page 13 UX-Z7MDR 2.1.13 Removing the power trans assembly Bottom chassis clamp (See Fig.31 and 32.) • Prior to this procedure, remove the metal cover, the CD mech- anism assembly, the front panel assembly, the rear cover, the amp board, and the MD base chassis.
  • Page 14 UX-Z7MDR 2.2.2 Removing the key board Front panel assembly (See Fig.35 to 37.) • Prior to this procedure, remove the cassette mechanism as- sembly. (1) Pull out the volume knob in the front side of the front panel to remove.
  • Page 15 UX-Z7MDR 2.2.3 Removing the FM connection board joint i CN451 (See Fig.38 to 40.) (1) Remove the three screws S and the screw T that attach the joint i bracket (2) from inside the front panel. (2) Remove the card wire from the connector CN451 on the FL connection board.
  • Page 16 UX-Z7MDR 2.2.5 Removing the belt/drive motor (See Fig.42.) Belt • Prior to this procedure, remove the drive motor assembly. (1) Remove the belt from the pulley. (2) Remove the two screws V that attach the drive motor. Drive motor Fig.42 2.2.6 Removing the switch board...
  • Page 17 UX-Z7MDR 2.2.7 Removing the FL display FL connect board (See Fig.45 to 50.) CN671 (1) Remove the four screws X on the front side of the front pan- CN672 el that attach the case cover. (2) Pull out the FL panel from the bosses of the four joint "n"...
  • Page 18 UX-Z7MDR (4) Remove the two screws Z on the front side of the FL dis- FL cover play cover that attach the FL display. (5) FL board and lens will be detached from the FL display. Fig.49 FL board Lens Fig.50...
  • Page 19 UX-Z7MDR 2.3 CD Mechanism Assembly TRAMECHA assembly 2.3.1 Removing the CL. Base Assembly and Tray (Refer to Figs. 1 to 5.) (1) Remove the two screws A fastening the CL. base assembly from the top of the CD mechanism assembly.
  • Page 20 UX-Z7MDR 2.3.2 Removing the TRAMECHA Assembly (Refer to Figs. 6 to 9.) • Remove the CL. base assembly and tray. Reference: The TRAMECHA assembly can be removed without removal of the mechanism P.C. board. (1) If the TRAMECHA assembly is lowered and it is located out...
  • Page 21 UX-Z7MDR 2.3.3 Removing the Mechanism P.C. Board (Refer to Fig 10.) Reference: The mechanism P.C. board can be removed without removal of the TRAMECHA assembly. Note: Before disconnecting the flexible wire coming from the pickup from the connector, be sure to solder its shorting round.
  • Page 22 UX-Z7MDR 2.3.4 Removing the Pickup(Refer to Figs. 11 to 14.) Flexible wire • Remove the CL. base assembly and tray. • Remove the TRAMECHA assembly. Shorting round Reference: The pickup can be removed without removal of the mechanism P.C. board.
  • Page 23 UX-Z7MDR 2.3.5 Reinstalling the Pickup Assembly 2.3.6 Removing the Feed Motor Assembly (Refer to Figs. 15 and 16.) (Refer to Fig. 17.) • Remove the CL. base assembly and tray. Reference: • Remove the mechanism P.C. board. Refer to the explanation of "Removing the Pickup" on the Remove the two screws E fastening the feed motor assembly preceding page.
  • Page 24 UX-Z7MDR 2.4 MD mechanism assembly 2.4.2 Removing the mechanism cover (See Fig.3) 2.4.1 Removing the main board (1) Remove the four screws B on both sides of the body. (See Fig.1 and 2) (2) Move the mechanism cover toward the front to disengage...
  • Page 25 UX-Z7MDR 2.4.3 Removing the head lifter (See Fig.4 to 6) (1) Move the head lifter on top of the body in the direction of the arrow and turn around. (2) Detach the spring from the hook of the body. Remove the head lifter with the spring.
  • Page 26 UX-Z7MDR 2.4.5 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. • Prior to performing the following procedure, remove the main...
  • Page 27 UX-Z7MDR 2.4.6 Loading assembly Slide base (R) 2.4.6.1 Removing the slide base (L) / (R) (See Fig.10) (1) Remove the two screws E on the upper side of the loading assembly. (2) Remove the slide base (L) outward. (Release it from the joint bosses E.)
  • Page 28 UX-Z7MDR 2.4.7.3 Removing the cartridge holder assembly (See Fig.14 and 15) (1) Remove the two screws I on the upper side of the loading assembly. Slide bar Cartridge holder assembly Eject bar Eject bar Part g Fig.14 2.4.7.4 Removing the slide bar and the eject bar (See Fig.14 and 15)
  • Page 29 UX-Z7MDR 2.4.8 Traverse mechanism assembly Insulators 2.4.8.1 Removing the Insulators (See Fig.16) Pickup unit (1) Disengage the four insulators from the notches of the traverse mechanism chassis. Insulators Traverse machanism chassis Fig.16 2.4.8.2 Removing the pickup unit (See Fig.17) (1) Turn over the traverse mechanism assembly and remove...
  • Page 30 UX-Z7MDR 2.4.8.4 Removing the feed motor assembly Traberse mechanism board Soldering j (See Fig.15, 20) • It is not necessary to remove the pickup unit. (1) For the white and black harnesses extending from the feed motor assembly, unsolder the soldering i on the traverse mechanism board.
  • Page 31 UX-Z7MDR 2.4.9 Reattaching the loading assembly (1) Reattach the eject bar to the UD base. (Fig.15 and 21) (2) Reattach the slide bar to the loading mechanism chassis while fitting the boss marked k to the eject bar slot. (Fig.21) (3) Slide the slide bar and the eject bar in the direction of the arrow in Fig.20 and reattach the cartridge holder assembly using the...
  • Page 32 UX-Z7MDR (4) 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 33 UX-Z7MDR (8) Reattach the UD base while engaging the four pins on both Slide base (R) sides of the UD base to the notches of the loading mecha- nism base and placing the edge (marked e’) of the car- Cam gear tridge holder assembly under the hook e of the loading mechanism base.
  • Page 34 UX-Z7MDR 2.5 Cassette mechanism section Cassette mechanism 2.5.1 Removing the playback / recording & eraser head (See Fig. 1 to 3) (1) While shifting the trigger arms seen on the right side of the head mount in the arrow direction, turn the flywheel R in counterclockwise direction until the head mount has gone out with a click (See Fig.
  • Page 35 UX-Z7MDR 2.5.3 Removing the head amplifier & mechanism control 2.5.4 Removing the main motor assembly board (1) Remove the two screws B retaining the main motor assem- (See Fig. 4) bly (See Fig. 4 and 5). (1) Remove the cassette mechanism assembly.
  • Page 36 UX-Z7MDR 2.5.5 Removing the flywheel Flywheel R Flywheel L (See Fig. 8 and 9) (1) Remove the head amplifier & mechanism control P.C. board. (2) Remove the main motor assembly. (3) After turning over the cassette mechanism, remove the two...

  • Page 37: Adjustment Method

    UX-Z7MDR SECTION 3 Adjustment method 3.1 MD adjustment(Auto adjust) (1) Setting of MD adjustment (2) Initialize of EEPROM Press MD REC button and set to MD POWER button together, adjustment mode then connect AC cord. INDICATION "TEST MODE1" INDICATION "TEST MODE1"...
  • Page 38 UX-Z7MDR (4) Disc adjustment(Auto adjust) Set to MD adjustment mode Adjustment Insert Pre-Mastard disc Press PLAY / button INDICATION INDICATION of remote controller "ON TUNING" "NG ERR;** INDICATION "ON TUNING" Press STOP button of remote controller START the AUTO ADJUSTMENT...
  • Page 39 UX-Z7MDR 3.2 Cassette adjustment 3.2.1 Cassette mechanism section 3.2.2 Cassette mechanism section (Back side) Head azimuth Head azimuth adjusting screw adjusting screw (Forward side) (Reverse side) Head azimuth Head azimuth adjusting screw adjusting screw Playback/Recording & (Forward side) (Reverse side) eraser head 3.2.3 Cassette AMP board...
  • Page 40 UX-Z7MDR 3.2.4 Tape Recorder Section Measurement Items Measurement method Standard Values Adjusting positions conditions Confirmation of Test tape 1 Playback the test tape VT703L (8kHz) Maximum output Adjust the head head angle : VT703L (8kHz) 2 With the recording & playback mechanism,...
  • Page 41 UX-Z7MDR 3.2.6 Electrical Performance Measurement Items Measurement method Standard Values Adjusting positions conditions Adjustment of Mode 1 With the recording and playback mechanism AC-225 VR31 recording bias : Forward or reverse mode load the test tapes(AC-514 to TYPE ll and : 4.20µA...
  • Page 42 UX-Z7MDR 3.3 Flow of functional operation until TOC read Check Point Slider turns REST Play Key Power ON Confirm that the voltage at the pin5 SW ON. of CN801 is "H"\"L"\"H". Automatic tuning of TE offset Check that the voltage at the...
  • Page 43 UX-Z7MDR 3.4 Maintenance of laser pickup 3.5 Replacement of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens Turn off the power switch and, disconnect the with a alcohol soaked cotton swab.

  • Page 44: Description Of Major Ics

    UX-Z7MDR SECTION 4 Description of major ICs 4.1 AK4519VF-X (IC480) : A/D D/A converter • Pin layout • Block diagram VA AGND VB VD DGND AINL Decimation MCLK Clock VCML Modulator Filter Divider CMODE AINR Decimation LRCK VCMR Modulator SCLK...
  • Page 45 UX-Z7MDR 4.2 AN22000A-W (IC601) : RF & SERVO AMP • Terminal layout • Pin function Symbol I/O Function I APC Amp. input terminal O APC Amp. output terminal - Power supply terminal I RF adder Amp. inverting input terminal RFOUT O RF adder Amp.
  • Page 46 UX-Z7MDR 4.3 AN7317 (IC32) : R / P amp. • Pin layout & block diagram Mute 112k 112k • Pin functions Pin No. Function Channel 1 playback amplifier input Channel 1 playback amplifier negative feedback Channel 1 playback amplifier output...
  • Page 47 UX-Z7MDR 4.5 XC62HR3502P-X (IC291) : Regulator • Pin layout • Block diagram VOUT Current Limit Output Voltage Control Reference • Pin function Pin No. Symbol Function Ground Supply voltage input Chip enable Non connect VOUT Regulated output voltage 4.6 GM71VS17400CLT5 (IC390,IC790) : DRAM •...
  • Page 48 UX-Z7MDR 4.7 MN662790RSC(IC651):Digital servo & processor • Pin layout • Pin function Pin No. Symbol Description BCLK O Bit clock output for SRDATA LRCK O Identifying signal output of L,R SRDATA O Serial data output DVDD1 - Power supply for digital circuit...
  • Page 49 UX-Z7MDR Pin No. Symbol Description RFDET I RF detection signal input L : detection I Dropout signal input H : dropout LDON I Non connect PLLF2 I/O Terminal for loop filter characteristic switch for PLL DSLBDA - Non connect WVEL...
  • Page 50 UX-Z7MDR 4.8 GP1UM261XK (IC602) : Receiver • Pin layout Vout • Block diagram Limiter B.P.F. Integrator Demodulator Comparator GND Vdd Vout 4.9 M63008FP-X (IC604) : 5ch Actuator driver • Pin layout • Block diagram VBS1 VBS2 VBS2 IN3- VBS1 IN3+...
  • Page 51 UX-Z7MDR 4.10 LB1641 (IC402) : DC Motor driver • Pin layout • Truth table OUT1 Input Output Mode OUT1 OUT2 Brake CLOCKWISE VCC1 VCC2 COUNTER-CLOCKWISE Brake OUT2 4.11 BD7910FV-X (IC450) : Pre driver • Block diagram Mute Pre driver SVcc Vregin •...
  • Page 52 UX-Z7MDR 4.12 BA3126N(IC31) : R/P Switch 4.13 BR93LC66F-X (IC403):EEPROM • Terminal layout • Pin Functions Symbol Function Power supply Connect to GND Chip select input Serial clock input Start bit, OP-code,address, serial data input Serial data output Internal state display output of READY/BUSY 4.14 CXA2523AR (IC300) : MD servo...
  • Page 53 UX-Z7MDR • Pin function Pin No. Symbol Function I-V converted RF signal I input. I-V converted RF signal J input. Vcc/2 voltage output. A current input for main beam servo signal. B current input for main beam servo signal. C current input for main beam servo signal.
  • Page 54 UX-Z7MDR 4.15 CXD2662R (IC350) : DSP • Pin layout • 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...
  • Page 55 UX-Z7MDR • Pin function (CXD2662R) Pin No. Symbol Function MNT0 I/O 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 56 UX-Z7MDR Pin No. Symbol Function I/O External DRAM data bus. MDDTI MD-DATA mode 1 switching input. (Low : normal mode ; high : MD-DATA mode 1) ASYO Playback EFM full-swing input. (Low : vss ; high : Vdd) ASYI Playback EFM comparator slice voltage input.
  • Page 57 UX-Z7MDR 4.16 L4909 (IC910) : Regulator • Pin layout 9 10 11 12 13 14 15 • Block diagram VINA THERMAL REFERENCE VINB 3,13 REF+20% SHUTDOWN GENERATOR REG1 ENABLE REG1 REG2 CONTROL REG3 REG2 OVER CURRENT CHECK TRIG REG3 • Pin functions Pin No.
  • Page 58 UX-Z7MDR 4.17 LA1838 (IC1): FM AM IF AMP&detector, FM MPX Decoder • 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 • Pin Function Pin No.
  • Page 59 UX-Z7MDR 4.18 LA4628 (IC905) : Power amp. • Pin layout • Block diagram OUTPUT PPIN TO VCC RIPPLE SHORT PROTECTOR FILTER -OUT1 PREDRIVER POWER LOAD SHORT POWER PROTECTOR PREDRIVER +OUT1 POWER OUTPUT PIN TO GND PRE GND BIAS OVER VOLTAGE/...
  • Page 60 UX-Z7MDR 4.20 LC72136N (IC2) : PLL frequency synthesizer • Pin layout FM/AM LPFOUT LPFIN CLOCK FM/ST/VCO FMIN AM/FM AMIN IFCONT SDIN IFIN • Block diagram Phase Reference Detector Driver Charge Pump Swallow Counter Swallow Counter 1/16,1/17 4bit 1/16,1/17 4bit Unlock...
  • Page 61 UX-Z7MDR 4.21 LA6541-X (IC801) : Servo driver • 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...
  • Page 62 UX-Z7MDR 4.22 LA72723(IC3): RDS demodulation • Pin layout VREF RDS-ID/READY MPXIN RDCL Vdda RDDA Vssa FLOUT MODE Vddd Vssd XOUT • Block Diagram FLOUT VREF Vdda CLOCK Vddd RECOVERY REFERENCE (1187.5Hz) (57kHz) VOLTAGE Vssa Vssd VREF 57kHz MPXIN (SCF) ANTI ALIASING...
  • Page 63 UX-Z7MDR 4.23 XC62ER3602M-X (IC400) : Regulator • Pin layout • Block diagram Current Limit Voltage Reference • Pin function Pin No. Symbol Function Power supply input Regulator output Base current control terminal Chip enable 4.24 TK11140SC-W (IC485) : Regulator • Pin layout...
  • Page 64 UX-Z7MDR 4.25 LC75345M-X (IC901) : E.volume • Pin layout 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 • Block diagram LINP LINM LVref LOPOUT CONTROL CIRCUIT LOGIC Vref INTERFACE CIRCUIT...
  • Page 65 UX-Z7MDR • Pin function Pin No. Symbol Function Serial data and clock input pin for control. Chip enable pin. Ground pin. LOPOUT Output pin of general-purpose operation amplifier. LINM Non-inverted input pin of general-purpuse operation amplifier. LINP Non-inverted input pin of general-purpuse operation amplifier.
  • Page 66 UX-Z7MDR VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.22042) Printed in Japan 200302WPC...