BBK DV721S Service Manual
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BBK DV721S Service Manual

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SERVICE MANUAL
DV721S
VOL1
VOL2

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Summary of Contents for BBK DV721S

  • Page 1 SERVICE MANUAL DV721S VOL1 VOL2...

  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS PREVENTION OF ELECTRO STATIC DISCHARGE(ESD)TO ELECTROSTATICALLY SENSITIVE(ES)DEVICES CONTROL BUTTON LOCATIONS AND EXPLANATIONS PREVERTION OF STATIC ELECTRICITY DISCHARGE ASSEMBLING AND DISASSEMBLING THE MECHANISM UNIT OPTICAL PICKUP UNIT EXPLOSED VIEW AND PART LIST BRACKET EXPLOSED VIEW AND PART LIST MISCELLANEOUS ELECTRICAL CONFIRMATION VIDEO OUTPUT (LUMINANCE SIGNAL) CONFIRMATION...

  • Page 3: Safety Precautions

    1. SAFETY PREAUTIONS 1.1 GENERAL GUIDELINES 1. When servicing, observe the original lead dress. if a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barrier, insulation papers shields are properly installed.

  • Page 4: Control Button Locations And Explanations

    3.Control Button Locations and Explanations Front Panel Illustration VOL1 VOL2 IR SENSOR MIC 2 VOLUME knob PAUSE button Disc tray MIC 1 VOLUME knob STOP button MIC 2 VOLUME knob REW button VFD display window OPEN/CLOSE button POWER switch button MIC 1 jack PLAY button...

  • Page 5: Prevertion Of Static Electricity Discharge

    4.PREVENTION OF STATIC ELECTRICITY DISCHARGE The laser diode in the traverse unit (optical pickup)may brake down due to static electricity of clothes or human body. Use due caution to electrostatic breakdown when servicing and handling the laser diode. 4.1.Grounding for electrostatic breakdown prevention Some devices such as the DVD player use the optical pickup(laser diode)and the optical pickup will be damaged by static electricity in the working environment.Proceed servicing works under the working environment where grounding works is completed.

  • Page 6: Assembling And Disassembling The Mechanism Unit

    5. Assembling and disassembling the mechanism unit 5.1 Optical pickup Unit Explosed View and Part List Pic (1)
  • Page 7 Materials to Pic (1) PARTS CODE PARTS NAME Q ty 14692200 SF-HD60 1EA0311A06300 ASSY, CHASSIS, COMPLETE 1EA0M10A15500 ASSY, MOTOR, SLED 1EA0M10A15501 ASSY, MOTOR, SLED 1EA2451A24700 HOLDER, SHAFT 1EA2511A29100 GEAR, RACK 1EA2511A29200 GEAR, DRIVE 1EA2511A29300 GEAR, MIDDLE, A 1EA2511A29400 GEAR, MIDDLE, B 1EA2744A03000 SHAFT, SLIDE 1EA2744A03100...

  • Page 8: Bracket Explosed View And Part List

    5.2 Bracket Explosed View and Part List Pic (2) Materials to Pic(2) 1.bracket 14. front silicon rubber 2.belt 15. Back silicon rubber 3.screw 16. Pick-up 4.belt wheel 17. Pick-up 5.gearwheel 18. switch 6.iron chip 19. Five-pin flat plug 7. Immobility mechanism equipment 20.

  • Page 9: Miscellaneous

    5.3 MISCELLANEOUS 5.3.1 Protection of the LD(Laser diode) Short the parts of LD circuit pattern by soldering. 5.3.2 Cautions on assembly and adjustment Make sure that the workbenches,jigs,tips,tips of soldering irons and measuring instruments are grounded,and that personnel wear wrist straps for ground. Open the LD short lands quickly with a soldering iron after a circuit is connected.

  • Page 10: Electrical Confirmation

    6.Electrical Confirmation 6.1. Video Output (Luminance Signal) Confirmation DO this confirmation after replacing a P.C.B. Measurement point Mode Disc Color bar 75% DVDT-S15 Video output terminal PLAY(Title 46):DVDT-S15 PLAY(Title 12):DVDT-S01 DVDT-S01 Measuring equipment,tools Confirmation value 200mV/dir,10 sec/dir 1000mVp-p±30mV Purpose:To maintain video signal output compatibility. 1.Connect the oscilloscope to the video output terminal and terminate at 75 ohms.

  • Page 11: Video Output(Chrominance Signal) Confirmation

    6.2 Video Output(Chrominance Signal) Confirmation Do the confirmation after replacing P.C.B. Measurement point Mode Disc Color bar 75% DVDT-S15 Video output terminal PLAY(Title 46):DVDT-S15 PLAY(Title 12):DVDT-S01 DVDT-S01 Measuring equipment,tools Confirmation value Screwdriver,Oscilloscope 200mV/dir,10 sec/dir 621mVp-p±30mV Purpose:To maintain video signal output compatibility. 1.Connect the oscilloscope to the video output terminal and terminate at 75 ohme.

  • Page 12: Mpeg Board Check Waveform

    7.MPEG BOARD CHECK WAVEFORM 7.1 27MHz WAVEFORM DIAGRAM 7.2 IC5L0380R PIN.2 WAVEFORM DIAGRAM...

  • Page 13: Am29Lv160D

    8. Am29LV160D 16 Megabit (2 M x 8-Bit/1 M x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory DISTINCTIVE CHARACTERISTICS Single power supply operation Embedded Algorithms — Full voltage range: 2.7 to 3.6 volt read and write — Embedded Erase algorithm automatically operations for battery-powered applications preprograms and erases the entire chip or any combination of designated sectors...
  • Page 14 PRODUCT SELECTOR GUIDE Family Part Number Am29LV160D Speed Option Voltage Range: V = 2.7–3.6 V -120 Max access time, ns (t Max CE# access time, ns (t Max OE# access time, ns (t Note: See “AC Characteristics” for full specifications. BLOCK DIAGRAM –...
  • Page 15 CONNECTION DIAGRAMS BYTE# DQ15/A-1 DQ14 DQ13 DQ12 Standard TSOP RESET# DQ11 RY/BY# DQ10 BYTE# DQ15/A-1 DQ14 DQ13 DQ12 RESET# Reverse TSOP DQ11 RY/BY# DQ10...
  • Page 16 CONNECTION DIAGRAMS RESET# BYTE# DQ15/A-1 DQ14 DQ13 DQ10 DQ12 DQ11 FBGA Top View, Balls Facing Down BYTE# DQ15/A-1 DQ14 DQ13 RESET# DQ12 RY/BY# DQ10 DQ11 Special Handling Instructions Flash memory devices in FBGA packages may be damaged if exposed to ultrasonic cleaning methods. Special handling is required for Flash Memory products The package and/or data integrity may be compromised in FBGA packages.
  • Page 17 PIN CONFIGURATION LOGIC SYMBOL A0–A19 = 20 addresses DQ0–DQ14 = 15 data inputs/outputs A0–A19 16 or 8 DQ15/A-1 = DQ15 (data input/output, word mode), DQ0–DQ15 A-1 (LSB address input, byte mode) (A-1) BYTE# = Selects 8-bit or 16-bit mode = Chip enable = Output enable = Write enable RESET#...

  • Page 18: Hy57V641620Hg

    HY57V641620HG 4 Banks x 1M x 16Bit Synchronous DRAM 8.1 HY57V641620HG DESCRIPTION The Hyundai HY57V641620HG is a 67,108,864-bit CMOS Synchronous DRAM, ideally suited for the main memory applications which require large memory density and high bandwidth. HY57V641620HG is organized as 4banks of 1,048,576x16. HY57V641620HG is offering fully synchronous operation referenced to a positive edge of the clock.
  • Page 19 HY57V641620HG PIN CONFIGURATION DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 54pin TSOP II 400mil x 875mil 0.8mm pin pitch LDQM UDQM /CAS /RAS A10/AP PIN DESCRIPTION PIN NAME DESCRIPTION The system clock input. All other inputs are registered to the SDRAM on the Clock rising edge of CLK Controls internal clock signal and when deactivated, the SDRAM will be one...
  • Page 20 HY57V641620HG FUNCTIONAL BLOCK DIAGRAM 1Mbit x 4banks x 16 I/O Synchronous DRAM Self refresh logic Internal Row & timer counter 1Mx16 Bank 3 1Mx16 Bank 2 Row active Decoders 1Mx16 Bank 1 1Mx16 Bank 0 Memory refresh Cell Array Column Column Active UDQM...

  • Page 21: Mt1389

    8.2 MT1389 MT1389 Progressive-Scan DVD Player SOC Specifications are subject to change without notice MediaTek MT1389 is a DVD player system-on-chip (SOC) which incorporates advanced features like high quality TV encoder and state-of-art de-interlace processing. The MT1389 enables consumer electronics manufacturers to build high quality, cost-effective DVD players, portable DVD players or any other home entertainment audio/video devices.
  • Page 22 MT1389 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE General Feature List 1024-bytes on-chip RAM Super Integration DVD player single chip Up to 4M bytes FLASH-programming interface High performance analog RF amplifier Supports 5/3.3-Volt. FLASH interface Servo controller and data channel processing Supports power-down mode MPEG-1/MPEG-2/JPEG video Supports additional serial port...
  • Page 23 MT1389 PRELIMINARY, SUBJECT TO CHANGE WITHOUT NOTICE MTK CONFIDENTIAL, NO DISCLOSURE Audio Effect Processing TV Encoder Dolby Digital (AC-3)/EX decoding Six 108MHz/12bit DACs DTS/DTS-ES decoding Support NTSC, PAL-BDGHINM, PAL-60 MLP decoding for DVD-Audio Support 525p, 625p progressive TV format MPEG-1 layer 1/layer 2 audio decoding Automatically turn off unconnected channels MPEG-2 layer1/layer2 2-channel audio Support PC monitor (VGA)

  • Page 24: Schematic & Pcb Wiring Diagram

    9. SCHEMATIC & PCB WIRING DIAGRAM FRONT SCHEMATIC DIAGRAM...
  • Page 25 FRONT SCHEMATIC DIAGRAM...
  • Page 26 POWER BOARD SCHEMATIC DIAGRAM...
  • Page 27 POWER BOARD SCHEMATIC DIAGRAM...
  • Page 28 OK SCHEMATIC DIAGRAM...
  • Page 29 OK SCHEMATIC DIAGRAM...
  • Page 30 OUTPUT BOARD SCHEMATIC DIAGRAM...
  • Page 31 OUTPUT BOARD SCHEMATIC DIAGRAM...
  • Page 32 MIAN SCHEMATIC DIAGRAM...
  • Page 33 MIAN SCHEMATIC DIAGRAM...
  • Page 34 MIAN SCHEMATIC DIAGRAM...
  • Page 35 MIAN SCHEMATIC DIAGRAM...

  • Page 36: Spare Parts List

    10. SPARE PARTS LIST DV721S MATERIAL LIST 1. POWER BOARD MATERIAL CODE MATERIAL NAME SPECIFICATIONS UNIT QUANTIT LOCATION 700007 SMD DIODE 1N4148 D518 0000284 CARBON FILM RESISTOR 1/4W1.5K±5% SHAPED 10 R516 0000452 CARBON FILM RESISTOR R506 1/6W150Ω±5% SHAPED 7.5 0000122 CARBON FILM RESISTOR 1/6W100Ω±5% SHAPED 7.5...
  • Page 37 0882095 SSS4N60B TO-220 U507 1000004 POWER GRID FILTER UT-20 40mH ±20% 10×13 L501 PHOTO-ELECTRIC 1080011 HS817 U502 COUPLER 0690001 CONTROLLABLE SILICON MCR100-6 U506 0690003 CONTROLLABLE SILICON NCR169D TO-92 U506 1940006 SOCKET 6P 2.5mm CN503 1940022 SOCKET 4P 2.0mm CN504 1940026 SOCKET 3P 2.0mm CN505...
  • Page 38 2360016 IR SENSOR HS0038B3V REM901 5231858 SOFT SPONGE 10×6×6.5 DOUBLE-FACED, HARD 1562726 9965-1 4. OK BOARD MATERIAL CODE MATERIAL NAME SPECIFICATIONS UNIT QUANTIT LOCATION 0000118 CARBON FILM RESISTOR R621,R622 1/6W10Ω±5% SHAPED 7.5 0000122 CARBON FILM RESISTOR R619 1/6W100Ω±5% SHAPED 7.5 0000123 CARBON FILM RESISTOR 1/6W330Ω±5% SHAPED 7.5...
  • Page 39 JP705,R707,L713,L714,JP 2100004 CONNECTION CORDS Φ0.6 SHAPED 10mm 1860029 SCART SOCKET SCART-01 JK706 JP702,JP703,JP708,JP709, 2100003 CONNECTION CORDS Φ0.6 SHAPED 7.5mm JP713~JP718,JP720 L715， 0390095 SMD MAGNETIC BEADS FCM1608K-221T05 L716,L701~L704,L706,L70 0310085 SMD CAPACITOR 50V 20P ±5% NPO 0603 C713 0200031 SMD CAPACITOR 50V 20P ±10% NPO 5mm C712 0780050 TRIODE...
  • Page 40 TC201,TC202,TC217,TC2 0260019 CD11 16V10U±20%5×11 2 21~TC233,TC236,TC240,T C241 ,TC244 TC207~TC209,TC211,TC2 0260028 CD11 16V220U±20%6×12 2.5 13,TC235,TC245,TC301 TC204~TC206,TC210,TC2 34,TC237,TC302~TC304,T 0260025 CD11 16V47U±20%5×11 2 C308,TC309,TC247,TC248 ,TC246 0310085 SMD CAPACITOR 50V 20P ±5% NPO 0603 C222,C232 0310190 SMD CAPACITOR 50V 27P ±5% NPO 0603 C275,C276 C262~C265,C266,C289,C2 90,C292,C293,C295,C296, 0310045...
  • Page 41 0880322 MM74HCU04M SOP U205 0880513 HCU04 SOP U205 881415 HY57V641620HGT-7 TSOP U211 881872 KSV464P4JA-70 TSOP U211 881182 LM1117MP-ADJ SOT-223 U209 881057 CS4360 SSOP U207 881031 24C02N SOP U202 882257 MT1389FE/C(C VERSION) QFP U201 881378 BA5954FP HSOP U302 960020 CRYSTAL OSCILLATOR 27.00MHz 49-S X201 1940140...

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