1. Manuals
  2. Brands
  3. JVC Manuals
  4. DVD Player
  5. XV-521BK
  6. Service manual

JVC XV-521BK Service Manual

Hide thumbs Also See for XV-521BK:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Instruction Manual
SERVICE MANUAL
Contents
point on the safety
the traverse unit
Instructions
1-2
1-3
1-4
1-5
1-15
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
Standard schematic diagrams
Printed circuit boards
Parts list
Area Suffix
XV-421BK
J
U.S.A
C
Canada
Area Suffix
XV-525BK/523GD
J
U.S.A
Area Suffix
C
Canada
1-18
1-23
1-24
2-1
2-5
2-12
3-1~
No.20836
Jun. 2000

Advertisement

Table of Contents
loading

Related Manuals for JVC XV-521BK

Summary of Contents for JVC XV-521BK

  • Page 1: Table Of Contents

    XV-521BK/523GD XV-525BK/421BK SERVICE MANUAL DVD PLAYER XV-521BK/523GD XV-525BK/421BK Area Suffix XV-421BK U.S.A Canada Area Suffix XV-525BK/523GD U.S.A Area Suffix XV-521BK Canada Contents Safety precautions Check points for each error 1-18 Importance administering Precautions for service 1-23 point on the safety...

  • Page 2: Safety Precautions

    XV-521BK/523GD/525BK/421BK Safety Precautions 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.

  • Page 3: Importance Administering

    XV-521BK/523GD/525BK/421BK Importance administering point on the safety For USA and Canada / pour Etats - Unis d' Amerique et Canada Caution: For continued protection against risk of fire, replace only with same type 2A/250V for F8901, 1.6A/250V for F8911 and F8921. This symbol specifies type of fast operating fuse.

  • Page 4: Dismantling And Assembling

    XV-521BK/523GD/525BK/421BK Dismantling and assembling the traverse unit 1. Notice regarding replacement of optical pickup 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 to the optical pickup or connected devices.

  • Page 5: Disassembly Method

    XV-521BK/523GD/525BK/421BK Disassembly method Top cover < Main body> Removing the top cover (See Fig.1) Remove the four screws A on both side of the body. Remove the two screws B on the back of the body. Lift up the rear part of the top cover while pulling the lower part of the sides, then detach upward.
  • Page 6 XV-521BK/523GD/525BK/421BK Removing the fitting (See Fig.3 to 6) Front panel Hole Prior to performing the following procedure, remove the top cover. ATTENTION: To remove the front panel assembly and the DVD mechanism assembly, remove the fitting in advance. by hand Turn over the body.
  • Page 7 XV-521BK/523GD/525BK/421BK Removing the front panel assembly (See Fig.7 to 10) DC mechanism assembly Main board AC jack board Prior to performing the following procedure, remove the top cover and the fitting. Disconnect the card wire from connector CN703 on the main board.
  • Page 8 XV-521BK/523GD/525BK/421BK Loading tray Removing the DVD mechanism assembly (See Fig.11 to 14) Prior to performing the following procedure, remove the top cover and the front panel assembly. CN101 Disconnect the card wire from connector CN101 on the DVD Servo. DVD Servo Disconnect the harness from connector CN031 on the DVD mechanism assembly.
  • Page 9 XV-521BK/523GD/525BK/421BK Removing the AC jack board (See Fig.15 and 16) AC jack board CN951 / CN705 Main board Prior to performing the following procedure, remove the top cover and the front panel assembly. Remove the two screws H attaching the AC jack board.
  • Page 10 XV-521BK/523GD/525BK/421BK Removing the main board (See Fig.19 and 20) Main board Prior to performing the following procedure, remove the top cover, the front panel assembly, the DVD mechanism assembly, the AC jack board and the DVD Servo. Remove the three screws J attaching the main board.
  • Page 11 XV-521BK/523GD/525BK/421BK Traverse mechanism unit Disassembly method Spring <DVD mechanism> Removing the traverse mechanism unit (See Fig.1 and 2) Remove the screw A and the spring on the upper side of the loading base assembly. Move the rear part of the traverse mechanism unit upward and pull backward to release the two joints a with the base chassis.
  • Page 12 XV-521BK/523GD/525BK/421BK Pickup unit Removing the pickup (See Fig.5 to 9) It is not necessary to remove the traverse mechanism unit. Flexible board Solder soldering d on the flexible board next to the pickup unit. From the bottom of the traverse mechanism unit, disconnect the flexible wire from CN10 on the pickup board.
  • Page 13 XV-521BK/523GD/525BK/421BK Removing the pickup board (See Fig.5 and 10) Pickup unit It is not necessary to remove the traverse mechanism unit. Flexible board Solder soldering d on the flexible board next to the pickup unit. From the bottom of the traverse mechanism unit, disconnect the flexible wire from CN10 on the pickup board.
  • Page 14 XV-521BK/523GD/525BK/421BK Removing the turn table assembly Pickup unit (See Fig.5, 10, 12 and 13) Prior to performing the following procedure, remove Flexible board the traverse mechanism unit. Solder soldering d on the flexible board next to the pickup unit. From the bottom of the traverse mechanism unit, disconnect the flexible wire from CN10 on the pickup board.

  • Page 15: Main Adjustment

    1. The CD jitter meter is connected between "11"(GND) of CN104 and "12"(FLTOUT). The RF level is observed at the same time. 2. The first test disk(CTS-1000) made of JVC is reproduced. 3. It is confirmed that RF LEVEL is 360 100mVp-p.

  • Page 16: Dvd Player

    XV-521BK/523GD/525BK/421BK (4)Flap adjustment of the Pick-up guide shaft 1) Make sure that there is no disc on the tray. 2) Press both the "PLAY" and "OPEN/CLOSE" keys of the main unit to activate the primary power and "TEST 2 D2" will be displayed on the FL indicator.
  • Page 17 XV-521BK/523GD/525BK/421BK Confirmation after adjustment. Confirm to reproduce video CD and CD after the DVD test disc is adjusted and to find abnormality. Fig.2 (5) About keeping the disc As for the DVD test disc, plane accuracy is demanded.Please note the keeping place on the disc.

  • Page 18: Check Points For Each Error

    XV-521BK/523GD/525BK/421BK Check points for each error (1) Spindle start error *Defective spindle motor Are there 10ohms resistance between each pin of CN101 "29~31"? (The power supply is turned off and measured.) *Hall element: Is sine wave output between CN101 "23" and "24", between "25" and "26", and between "27"...
  • Page 19 XV-521BK/523GD/525BK/421BK (3) Traverse movement NG * For automatic adjustment, traverse movement occurs only when the position is changed to retry judging the disc type after the 1st judgment resulted in an error. Therefore, traverse movement rarely occurs because, in most cases, disc judgment at the current position (1st time judgment) is executed successfully.
  • Page 20 XV-521BK/523GD/525BK/421BK (6) Spindle CLV NG * When the spindle cannot be shifted to CLV Servo, does not become "H" between IC301 "69" and IC201"37". * IC201 Is signal output from CN103 "1" (RFOP)? * IC201 Is signal output from CN103 "11" (DSLIP)? * IC201 Is signal output from CN103 "6"...
  • Page 21 XV-521BK/523GD/525BK/421BK (9) Neither picture nor sound is output * Cannot search a) Can the feed system be driven? Check the waveform of TRSDRV signal (R273). --- Waveform between R274 and C271. Search results in a change of duty (three values with 2.5V at the center) (The figure is exaggerated.)
  • Page 22 XV-521BK/523GD/525BK/421BK (10) Picture is distorted or abnormal sound occurs at intervals of several seconds. Does JITOUT change periodically? Some system other (2V or more in peak than servo may be value, except defective. during kick) Feed system is defective (drive gain is defective: too large).

  • Page 23: Precautions For Service

    XV-521BK/523GD/525BK/421BK Precautions for Service Handling of Traverse Unit and Laser Pickup 1. Do not touch any peripheral element of the pickup or the actuator. 2. The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.

  • Page 24: Description Of Major Ics

    XV-521BK/523GD/525BK/421BK Description of major ICs AK93C45AF-W (IC791) : CMOS EEPROM 1.Pin Layout AK93C45AF 2.Pin Functions Symbol Function Chip Select Serial Clock Input Serial Data Input Serial Data Output Power Supply Ground Non connection 3.Block Diagram DATA R/W AMPS REGISTER EEPROM...
  • Page 25 XV-521BK/523GD/525BK/421BK AK93C65AF-X (IC403) : EEPROM 1.Terminal 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 DECODER ADD. GENERATION BUFFERS VPP SW VREF GENERATOR 3.Pin function Pin no.
  • Page 26 XV-521BK/523GD/525BK/421BK HY57V161610DTC8 or KM416S1120DT-G8 (IC504,IC505) : 16MB SDRAM 1.Block diagram Clock Generator Bank B Address Bank A address buffer & Mode Refresh register counter Sense amplifier Column decoder Column & latch circuit address buffer & burst Data counter counter 2.Pin function Pin No.
  • Page 27 XV-521BK/523GD/525BK/421BK MC44724AVFU (IC554) : VIDEO ENCODER 1.Terminal layout 2.Block diagrams 64 ~ ChipA Y/G1Vdd Copy, Sync_ generator DVdd CVBS/Cb/B1Vdd protection DVdd C/Cr/R1Vdd CGMS, CCwss gen DVss wss gen Y/G1 Y/G1 DVss CVBS/Cb/B1 off_set DVIN[7:0] CVBS/Cb/B1 DEMAX C/Cr/R1 TP[8:1] C/Cr/R1 TVIN...
  • Page 28 XV-521BK/523GD/525BK/421BK MN101C12GCS3 (IC701) : System micom 1.Terminal layout 100 ~ 76 26 ~ 50 2.Pin function Pin No. Symbol Function A set bit0 (It is effective in the U.E version) A set bit1 (It is effective in the U.E version) A set bit2 (It is effective in the U.E version)
  • Page 29 XV-521BK/523GD/525BK/421BK MN101C12GCS3 (2/2) Pin No. Symbol Function 48kHz, 96kHz switch CHREQ Changer communication REQUEST CHST Changer communication STROBE CHDATAIO Changer communication DATAI/O CHCK Changer communication CLOCK FLDATAO FL driver communication DATAO FLDATAI FL driver communication DATAI FLCK FL driver communication CLOCK...
  • Page 30 XV-521BK/523GD/525BK/421BK NJM4580D (IC672) : 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 IC-PST9140-T (IC717) : Reset IC 1. Block diagram 1-30...
  • Page 31 XV-521BK/523GD/525BK/421BK NJM78M05FA (IC718) : Regulator 1. Terminal layout 2. Block diagram 1-31...
  • Page 32 XV-521BK/523GD/525BK/421BK STR-G6651 (IC901) : Switch regulator 1-32...

  • Page 33: Block Diagram

    XV-521BK/523GD/525BK/421BK TC74VHC00FT-X (IC503) : Wright timing control TC7WH74FU-X (IC374) : Clock buffer 1.Terminal layout / Block diagram 1.Terminal layout 2.Block diagram TC7SH32FU-X (IC312) : Timing control 1.Terminal layout TC7SH08FU-X (IC311) : Timing control IN B 1.Terminal layout IN A IN B...
  • Page 34 XV-521BK/523GD/525BK/421BK ZIVA3-PE0 (IC501) : AV Decoder ZIVA3-PEO (1/5) Function Symbol Pin No. Programmable I/O pins.Input mode after reset. PIO0 8-bit bi-derectional host data bus. writes data to the decoder Code FIFO via HDATA. HDATA0 MSB of the 32-bit word is written first. The host also reads and writes the decoder HDATA1 internal registers and local SDRAM via HDATA.
  • Page 35 XV-521BK/523GD/525BK/421BK ZIVA3-PEO (2/5) Function Symbol Pin No. PIO28 PIO29 Programmable I/O pins. Output mode after reset PIO30 VDD-3.3 3.3-V supply voltage for I/O signals. PIO31 Programmable I/O pins. Output mode after reset Ground for core logic and I/O signals. No Connection Programmable I/O pins.
  • Page 36 XV-521BK/523GD/525BK/421BK ZIVA3-PEO (3/5) Function Symbol Pin No. MADDR8 Memory address. MADDR10 VDD-3.3 3.3-V supply voltage for I/O signals. MADDR7 Memory address. Ground for core logic and I/O signals. MADDR0 MADDR6 Memory address. MADDR1 VDD-3.3 3.3-V supply voltage for I/O signals.
  • Page 37 XV-521BK/523GD/525BK/421BK ZIVA3-PEO (4/5) Function Symbol Pin No. VDD-3.3 3.3-V supply voltage for I/O signals. VDATA4 Video data buses for byte sequential CbYCrY data. The decoder does not run VDATA during the power up procedure. However, during booting the decoder uses operational configuration parameters or 3-state VDATA.
  • Page 38 XV-521BK/523GD/525BK/421BK ZIVA3-PEO (5/5) Function Symbol Pin No. DVD-DATA7 DVD parallel compressed data from DVD DSP. When DVD DSP sends 32-bit words, it must write /CDG-SCLK the MSB first. DVD-DATA6 CDG-SDATA:CD+G (Subcode) Data.Indicates serial subcode data input. /CDG-SOS1 CDG-VSFY:CD+G (Subcode)Frame Sync. Indicates frame-start or composite synchronization input.

  • Page 39: Xv-521Bk/523Gd

    XV-521BK/523GD XV-525BK/421BK VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINSS DIVISION PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan No.20836 2000 06 (S)

This manual is also suitable for:

Xv-523gdXv-525bkXv-421bk

Table of Contents