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service manual DV717SI-2 DV723SI DV721SI-2

1. IS 22 155 ios J S 12111 1 leet 8 ES lt INN i r pue re E SE PINE MEE o pl 4 zi 4 1 3 L 418 1 gt 58 2 Vig al 1 1 pe q P p y RE Fa 1 a d Hu i eese c el BN ol eJ AS lt I D I o EEEE x PUDE Wp c SSS eee cr e eise zd 1 2 cM l i sa OEC LE fo t S ac A E omar o vm lt 14 11188 ME E Be E 5 po DL et us h RS B eS 4 98 88 Wi g amr gt D ue 88 21 L 2 lt gji 2 Jiga gt o val FERAM EM r 3 1988 DN L 5 V L Du 6081
2. R605 10k DNS pog ETS 76 R712 22K DNS PDAT2 V703 C724 10205 1 XS702 AGND 2 L 3 XS3 716 OR DNS R713 _OR DNS pz AGND VGND 8050 DNS VGND D701 YIN4148 NI D702 Ny IN4148 AGND C726 104 DNS L713 FCM N 5 1V 0 5W VGND VIS3921 PDAT2 1 rr 2 VGND JP728 PDT OR s Pr 5 VGND 0 VGND R721 OR DNS YI 7 VGND 8 Pb 9 PDATO JP729 OR 10 VIEDOR 725 OR DNS 12 10V AGND R718 OR 15 10 16 R R719 OR fomD 0 0 JK702 em OR SPDIF C710 R702 100R Pb C717 JOR 177 FBSMT Pr em OR 407 VGND XS701 16 prog LOO AV v CS HER105 D512 5 2 5 Power CN502 XS05 2 0 CN501 gt XS0620 AP 2 3 4 GND ADDED GND 5 gt 0503 gt a 2 2 Z 5 a oe 58 SS 4 NET a 127 lee sl al al I DR 88 25 ea sg in E Le ES Lr 2 1 dg 1 1 1 a gt 2 HAL 4 Ed UPS E Lc hx gus T gt SE o uds 5 2 gt 5 8 I 9 8 uns al m
3. 3 2 0 1 VD602 R602 C604 R606 184148 474 16 22K 103 10K R621 R622 10ohm1 6W 10ohm1 6W 49V 49VA 9V VA TC615 1 TC616 Le 47 16 104 4TaF 16V 104 506 JIN
4. SIS 3 3 lt 2 2 E m o lt A i I 5 5471656 50V 151 5 0603 3x6 COLOR ZINC 2 m Q o 2 2 0310048 SMD CAPACITOR 0630009 EMISSION PIPE 0700007 SMD DIODE 0700001 SMD DIODE 0700002 SMD DIODE 0780130 SMD TRIODE 0880220 IC 0882379 IC 0970003 CERAMIC RESONATOR Oo CD 2 CD N gt N I E N S BR A o 4000038 SELF TAPPING SCREW 0090272 SMD RESISTOR 1 16W 10 5 0603 1564324 PCB 1 88 5 2 2 UJ gt SURFACE CASING OF CONTROL BOTTOM CASING OF REMOTE CONTROL BATTERY CASE DOOR OF REMOTE CONTROL GLASS OF REMOTE CONTROLLER ANODE SPRING 3031789 3041399 3051319 3051273 026 MING PURPLE 3850124 3850125 CATHODE SPRING 3850126 ANODE CATHODE SPRING gt UJ N 9 2 2 2 2 2 2 x S e e e e e e o e o 00 UJ A 2 2 A A 4631052 CONDUCT GLUE OF 5070070 GLUE BAG 2 2 101 ape MATERIAL NAME SPECIFICATIONS LOCATION DV717SI 2 SILVER 1389HD SUBSIDIARY PANEL 5445111 230 2 0 2 PIN WITH L 2121417 FLAT CABLE NEEDLE TOGETHER DIRECTION 1340064 LIGHT TOU
5. ANN gt 3 5 4 function introduction to 29LV160BE The 29LV160BE is a 16Mbit FLASH memorizer and the damage of U214 may cause troubles such as power not on no disc reading and power on picture mosaic Pin function is shown as the following table Ce e ve Jem nnn me 09 9 4 sues mew Take word extend mode asdata line and bit extend mode 45 DQ15 A 1 as address line Select 8 bit or 16 bit output mode High level is 16 bit output and low level is 8 bit output 3 5 5 function introduction to HY57V641620HGT 7 64M 16 bit memorizer SDRAM with the player and the working clock frequency is 166 143MHZ The function of 165DRAM in DVD players is to memorizer the program of AML3298 taken out from FLASH and information of image and sound taken out from disc to form buffer add the stability of information output and add anti shaking effect of player Pin function introduction is shown as the following table 66 Signal flow lt e Data input output screen shielded LDQM signal we 67 VDDQ 3 3V power supply VDDQ 3 3
6. 30 d rere ete 30 3 2 15 AV output board circuit eene 34 32 Section Three Servicing Cases 24 3 3 1 Servicing cases esses emen 24 3 3 2 Troubleshooting flow Chart eese 38 Section Four Waveform diagramS eene 40 Ection Five Function Introduction to IC yu IQ pied crue IRE E Aie ur race estera eM 48 3 5 1 function introduction to MT1389HD MH 48 3 5 2 function introduction to 24 02 usemascnscec 64 35 3 function introduction _ ____________ 65 3 5 4 function introduction to 66 3 5 5 function introduction to HY57V641620HGT 7 66 3 5 6 function introduction to 4580 68 3 5 7 function introduction to 58885 e 68 35 d introdibllon io _______________ 70 3 5 9 function introduction toVIPER22A 71 2 9 10 function introduction 72 72 3 5 12 function introduction to ee 73 3 5 13 function introduction to 4558 n Mee 73 3 5 14 function introduction to 1308 74 3 5 15 function introduction to Pt6961 75 46 function fntraduction toL MTTIT 77 Chapter Four Disassembly and Assembly Process e eee 78
7. 6 1 DVD disc 5 DTS 9 PLAY 2 6 VCD CD SVCD Disc 10 Repeat 3 Chapter or Track 7 Disc 1 PAUSE 4 Playback time 8 Playback status indication G DOLBY Digital E 22 53 amp G 2 2 4 Remote Control Illustration OK Button Cancel Button ZOOM Button Zoom in out the displayed frame 1 Play or pause playback gt gt Button Fast forward play Stop playback Button Skip forward CAPTURE Button Set the played image as the power on logo VOL Button Increase decrease volume level MUTE Button Press once to mute twiceto turn off 1 Open or close the disc tray 2 LANG Button Change the audio language or audio channel 3 MEMORY Button Save the playing point or jump to the saved point 4 DISP Button Display or hide disc information 5 NUMBER Buttons 6 BROWSE Buttons switch new user interface 7 CURSOR Buttons 8 SETUP Button Function Setup 9 Button Open close the virtual keyboard function 10 KARAOKE Button Karaoke operation menu 11 Button Fast backward play 12 Skip backward 13 PEPEAT Button Repeat play 14 Button Repeat the select 19 Press once to stand by Presstwice to play 16 SUBT Button Change subtitle language Switch JPEG display mode 17 Q PLAY Button Skip
8. o 3 5 8 function introduction to V6312A 1 DESCRIPTION The V6312Ais a FIP fluorescent Indicator Panel or Vacuum Fluorescent Display controller driver that is driven a 1 4 to 1 11 duty factor It consists of 11 segment output lines 6 grid output lines 5 segment grid output drive lines a display memory a control circuit and a key scan circuit Serial data is input to the V6312A through a three line serial interface This FIP controller driver is ideal as a peripheral device for a single chip microcomputer FEATURES Multiple display modes 11 segment amp 11 digit to 16 segment amp 4 digit Key scanning 6 _ 4 matrix Dimming circuit eight steps 2 High voltage output VDD _ 35 V max LED ports 4 chs 20 mA max General purpose input port 4 bits external resistors necessary for driver outputs open drain pull down resistor output Serial interface CLK STB DIN DOUT 3 PIN DESCRIPTION wem mme 70 21 to 25 Seg to Seg11 37 to 32 Grid1 to Grid6 Seg12 Grid11 to 26 28 to 31 Seg16 Grid7 42 to 39 LED1 to LED4 High voltage output segment High voltage output grid High voltage output segment grid LED output 10 to 13 KEY1 to 4 NE EN Key data input 3 5 9 function introduction to VIPER22A 1 DESCRIPTION The VIPer22A combines a
9. gt Center LS RS 180cm b Press UP DOWN navigation keys to Select the desired item oup Press OK or RIGHT button to enter setting c Press UP DOWN navigation keys to raise or lower volume d Press OK or LEFT to return to the Delays in channels setting page PRO Logic To set PRO Logic 1 to ON or OFF If the TITLE does not supportthis function we recommend that you set this item to AUTO because it would become worse if the processing effects were added forcibly Optional setting Auto On Off Default Auto 2 Digital output selectto set the format and stream form of digital audio output A SPDIF format Optional setting RAW format SPDIF PCM Default RAW format B LPCM Optional setting 48 kHz 16 bit 96 kHz 24 bit 192kHz24bit Z Default 48 kHz 16 bit 3 Tuning A Max volume setthe maximum volume limit B Equalizer To set Equalizer modes Optional setting Off Rock Pop Live Dance Techno Classic Soft Default Off C Echo To set different sound field effects Optional setting Off Concert Living room Hall Bathroom Cave Arena Church Z Default Off D Tone balance to set the tone level to match your diapason when you re singing Method to adjust tone control a Press UP DOWN cursor buttons to select tone item in Audio Setting page and then press OK or RIGHT button to enter Adjustment Menu b Press UP DOWN cursor button to
10. fos nur sees 4 29 jap sg 2 im m m 81 5 1 4 Bottom layer of DECODE amp SERVO Board ale eels CO t 82 5 1 5 Surface layer of Board 02 V703 MESE Eu 1714 7231 0 702 1743 DVD 2006 1 17 83 5 1 6 Bottom layer of AV Board 84 5 1 7 POWER Board CAUTIONFORCONTIUEIPROTECTION AGAINST OF FIREREPLACE ONLY 8 HIGH WITHSAME F501 818 T1 6A L250V FUSE 1 VOLTAGE BC505 8 5 BCN502 BCNS01 220V __ 220V 501 gt 5 lt e E 5 5DV985 1 LEI DVD 2006 04 04 85 98 CARD OUTAXDNS IO 0 Cl lol C2 1002 C3 3 104 CS 105 C6 6 7 07 8 YO 109 1010 12 IO 19 12 Y4 IO 13 YS 10 14 Y6 IO 15 kzi 10 16 89_VSYNC VSYNC 89_HSYNC HSYNC DISCEJT R230 OR DNS 21 R229 R V_SYNC 2 H_SYNC TOVGA L C296 VGND 102 DNS H_SYNC 1 Ec V SYNG 2 ASPDIF TEC958 3 1 ve 4 VIDEO R V 3 6 gs VIDEO SIKDNS KONS SPDATA pend C270 bas 10205 AGND VIDEO R213 OR 3 CC R292 OR DNS XS16 49V 2214 OR R293 OR DNS SR
11. e CD 3 3 x x v v 130 vol vol 5 AL 6 31 93 09 Od o 2 a a lt ds dS 45 45 Q lt A LINIT 65 g 819 gt 15 mA x lt oaJA x vasa gt vas mial DNO CO 0 QvO1 gt 2065 LovSx 3 8 9 6 055 a 83 8 5 6 3 LOGUD 5 o Ee u LO Z I LZ Le y 1 4 4 jo god Jo ejd ay uonisoduioo 3 1 3 Introduction to IC of the player Introduction to IC ofthe player is shownas in the following table HY57 641620HGT 7 28 SDRAM 4580 U209 U210 U211 Operational amplifier audio amplifying ANB888S Servo drive V6312A 0401 Panel control Main panel 4973 2 HS0038B3V 0403 Remote control receiver VIPER22 U501 Power switch IC Power board 5985 1 HS817 U502 Photoelectric coupler LM431A U503 Precision voltage stablizer KA4558 U601 Operational amplifier MIC OK board 6717 0 a TDAI308 308 Headphone amplifying amplifying 15 Section Two Unit Circuit Princ
12. 9 8 TSSOP 8 2 Packages 3 DESCRIPTION Serial Data input 64 Serial SCL input Test port Positive Power Supply 3 5 3 function introduction to CS5340 1 Description The CS5340 is a complete analog to digital converter for digital audio systems It performs sampling analog to digital conversion and anti alias filtering generating 24 bit values for both left and right inputs in serial form at sample rates up to 200kHz per channel The CS5340 uses 5 order multi bit Delta Sigma modulator followed by digital filtering and decimation which remove the need for an external anti alias filter The CS5340 id ideal for audio systems requiring wide dynamic range negligible distortion and low noise such as set top boxes DVD karaoke players DCD recorders A V receivers and automotive applications Features Advanced multi bit Delta Sigma architecture 24 bit conversion Supports all audio sample rates including 192 kHz 101dB Dynamic Range at 5V 94 dB THD N 2 High pass filter to remove DC offsets Analog digital core supplies from 3 3V to 5V Supports logic levels between 2 5Vand 5V Linear phase digital anti alias filtering Auto mode selection Pin compatible with the CS5431 3 PIN DESCRIPTION Mode Selection Master Clock Serial Audio Data Output Digital Power 65 Left Right Clock
13. 71751 2 235 72151 2 service manual Catalog Chapter One About Maintenance eee eee eee 1 1 Safety precautions eee eee 1 PoWer Supply tei eset eee en eee 14 2Precautions e e nor ____ AEE 14 3 Precautions for laser head oee ____________________ i ia iai 1 1 4 About placement position eee eren 1 2 Maintenance method 1 21 Visualized method 1 2 3 Voltage method 1 2 4 Current method ee 1 2 5 Cutting method ________________ _ 1 2 6 Element substitution Method 1 2 7 Comparison method 1 3 Required device for maintenance Chapter Two Functions and Operation Instructions PENSA TES ID 2 2 Control Button Locations and Explanations eee E 5 55 9 P ar Panel ___________ __ _______ FH 2 2 3 Display Window Illustration mmm nennen Benois Control IUSSI OE 2 3 Accessories rad ad Vd a or Y EO Fa Wa Eee VOY Ii e da gor 2 A FUNCTION SETUP
14. To set the parental control ratings to prevent children from watching the restricted contents In case the disc supports this function Optional setting any PG PG 13 PGR NC 17 Default any 2 Set password To set four digit password to enable you to change the parental control ratings Default 7890 Old password _ Verify EN OK Cancel 2 4 9 Initial setup Press UP DOWN arrow to select the desired option and Press OK button to confirm it NOTE In this setup state you may not press LEFT button to return to the previous menu 2 4 10 Rest to defaults Load factory settings Reset to defaults To restore all settings to the default value except for the parental control and password settings 2 4 11 Exit Language Image Playback Karaoke Preference Parental control Initial setup Reset to defaults Exit Press UP DOWN arrow to select the Exit item Press OK button to exit the setup menu 2 5 Specifications DVD Video Super VCD VCD DivX 3 11 DivX 4 DivX 5 Divx Pro XviD CD DA CD G HDCD MP3 WMA Kodak Picture JPEG Analog audio output Stereo output 5 1CH Digital audio output Coaxial Optical Vid tout Composite S Video component Y Cb Cr progressive scan geo OQU PUS Joutbut Y Pb Pr RGB SCART Headphones output Playerable discs Audio outputs Video amplitude S Video amplitude Component Video amplitude
15. 0210207 TERYLENE CAPACITOR 275V 104 20 15mm VDE 02002249 PORCELAIN CAPACITOR 1000V 103 80 20 7 5mm BLET PORCELAIN CAPACITOR 50V 104x209 5mm BELT 100V 152 10 5MM 50V 473 20 5mm BELT 0460623 SWITCH POWER TRANSFORMER 19 0348 SJ POWER GRID FILTER JLB1153 33MH 0 SJ PHOTOELECTRIC COUPLER HS817 VDE 250V 221 10 10mm VDE T gt m 20 UJ gt 2 o 00002159 CARBON FILM RESISTOR 00001959 CARBON FILM RESISTOR 00001859 00001729 00700169 0010159 00100159 05700059 05800069 VOLTAGE REGULATOR DIODE 0680046 SCHOTTKY DIODE 05700149 05700139 0260809 CD 0260694 CD 0260557 CD 0260559 CD 0260341 CD lt m m z D x w mm 02001389 02003809 PORCELAIN CAPACITOR 02001369 PORCELAIN CAPACITOR 0880863 I 2 5 lt U 5 0881933 lt m 20 gt U 1000062 1080032 0200359 100 MATERIAL CODE MATERIAL NAME SPECIFICATIONS VERTICAL 10UH 2A 5mm T1 6AL 250V 3 6x10 VDE NN 0410011 2100004 LEAD 2100003 LEAD 1940045 SOCKET 1940022 SOCKET 1940024 SOCKET 2300049 FUSE 3870115 GROUND CHIP OF POWER 1564554 PCB 00 T gt A A U m gt 215 519 919 lt 50 3 3 3 I I 3 3 3 gt gt
16. Chapter Cinque PCB board amp Circuit diagram eee een 79 Section One PEB board o a aa 79 Section Two circuit diagram eem nennen nnne 86 Chapter six BOM List emen eene 94 7 ee ee 103 744 Panel control circuit ____________________ ____ 104 E 104 7 1 3 Headphone LLL LLL LLL LLL LLL LL LL 105 7 2 1 _______ ____ ____ ___ _ __ 106 7 2 2 Troubleshooting flow chart 107 734 PCB board 109 7 3 2 circuit diagram p HUND DIUI Hep UU PER DEOR RUE 113 DV721SI 2 service Manual Henne 115 8 1 1 Panel control circuit 116 8 12 MIC Gil Guil 116 8 2 1 Servicing instances eene 118 83 1 oard ___________ Lr 119 8 3 2 circuit diagram rs 123 Chapter One About Maintenance 1 1 Safety precautions 1 1 1 Power supply When maintenance personnel are repairing DVD players he should pay special attention to the power board with 220V AC and 330V DC which will cause hurt and damage to persons 1 1 2 Precautions for antistatic Movement and friction will both bring static electricity which causes serious damages to integrated IC Though static charge is little when a limited quantity of electric charge is added to large scaleintegrated IC as the cap
17. _ ____ _ ___________ 2 4 1 Function 2 4 2 Language es bio I 2 4 5 Playback ER 246 ___ __ ___ RU Ra FRU RR Raga Paca E a 9 Maz 10 2 4 8 Parental control essem nennen nennen ene einen 10 2 4 9 Initial setup emen 10 23i 404 ______ ______________________ 11 FAAN EKI EE 44 2 5 Specifications 11 Chapter Three Principle and Servicing eee eme 13 Section One Principle ofthe Player eese 13 3 1 1 Block diagram ofthe player eme eee eene 13 3 1 2 PCB board composition diagram of the player st 14 3 1 3 Introduction to IC of the player eem mener 15 Section Two Unit Circuit Principle eem 16 3 2 1 head circdjt UU ee BUM 16 18 3 2 3 Laser power control circuit nns 20 2 21 3 2 5 Open close door drive circuit 22 32 6 eee ce cet ee 23 3 9 7 Re LL 24 25 33 0 Video a eee ene ini a gael 26 eee eee 27 ED LLL QD LT 28 2 29 3 2 13 Headphone circuit
18. VR DVD A 0 20 CD DVD U207 Switch 4008 FLASH VR DVD Laser ipo VR CD ower contra __ 1001 Loader 0201 RAS DVD A B C D RFO CASE CD A B C D E F gt V20 MT1389 5900 15 SDRAM E TRIN MA 0 11 U208 TROUT 3 LIMIT gt DCLK Feed electric machine TK FC DCKE SL VIP4 STBY URST SCL SDA IR VSDA VSCK VSTB FSO Main axis electric machine FOSO U301 FMSO Reset U202 Panel remote control DMSO circuit 24C02 receiver OPEN CLOSE 58885 TRSO TROPEN TRCLOSE TR B1 lt REGO1 Voltage drop 3 3V circuit _ 2 Voltage drop REGOA circuit mr Figure 3 1 1 1 Block diagram ifthe player 2413 vL JeKe d eu jo uonisoduioo god ZTE AS g 8 5 6 anov P LOLSX 1 1 gt lt Nw ze 9 9 gt ooaoc or oOoQQQgsa052 aio o n50 5n0 uU 8 HH DO dia aou EE gt WH atao 9 n I 6 w 5 59 e OZA OZA NOV 4 5
19. Video Characteristics Frequency response Audio characteristions _ Slgnal to noise ratio THD 1 0Vp p 75 Q Y 1 0Vp p 75 C 0 286Vp p 75 9 Y 1 0Vp p 75 Cb Cr 0 7Vp p 75 0 20 20KHz 1 dB 100 dB 0 0196 Operating voltage 110 250V 50 60Hz TAM Dimensions 380mm x 258mm x 41 5mm General Specifications Mass 2kg 11 Operating Temperature 5 35 C Operating Humidity 15 75 condensation Design and specifications are subject to change without notice We so not guarantee that all discs can be played smoothly due to the disc quality disc recording quality and recording format 12 Chapter Three Principle and Servicing Section One Principle ofthe Player 3 1 1 Block diagram of the player 0 717 1 2 is composed of decode circuit servo circuit audio circuit video circuit MIC circuit and power circuit Block diagram of the player is shown in the figure 3 1 1 1 Output terminal MIC board 77 lt gt 52554 Video filteringclamping CS P H 2552555 tis 14910 o 0 c m x lt lt LE 14444 8 5
20. 1 6W3 3K 5 SHAPED 7 5 CARBON FILM RESISTOR 1 6W5 1K 5 SHAPED 7 5 CD CD11C 16V100U 20 15 6x7 2 5 MICROPHONE SOCKET NEEDLE REVERSE 28 CORD SOCKET FLAT CABLE 99 LOCATION C601 C602 C604 C605 C6230 0 0 0 C601 C602 C604 C605 C623 1 0 C601 C602 C604 C605 C623 1 0 0 0 609 611 612 R629 R611 TC614 0 0 0 TC614 TC6180 000 TC614 TC6180 0 00 Q Q o o TC619 TC620 Co Co TC619 TC620 Co Co TC619 TC620 Co TC619 TC620 Co TC619 1 620 Co Co TC605 TC605 L601 TC601 Co Co Co 601 Co Co Co ZD601 Q601 Q602 960111000 960111000 0603 601 5601 601 609 JK601 X CD o 4 MATERIAL SPECIFICATIONS LOCATION GROUND CHIP OF POWER 3870115 BOARD AB903 G601 G602 DV717SI 2 SILVER 1389HD 5448676 CARBON FILM RESISTOR 1 4 3300 5 BELT CARBON FILM RESISTOR 1 4W750 5 BELT HIGH PRESSURE RESISTOR 1 2W680K 5 VDE BELT METAL OXIDE FILM RESISTOR 2W39K 5 SHAPED FLAT 15x7 METAL FILM RESISTOR 1 4W10K4 1 BELT SR560 DO 27 SHAPED R 17 5x8 CD288 16V2200U 20 13 x20 5 CD288 10V1000U 20 8x16 C5 CD11T 16V100uz20966x12 2 5 CD11T 50V47ux20966x12 2 5 ZT 400 22 20 16x20 7 5 02607989 CD CD11T 16 4700 20 8 12 C5
21. 115 8 1 1 Panel control circuit 1 Panel circuit block diagram is shown inthe figure 8 1 1 1 Remote controller IR sensor CE CL DI DO Light emission diode Figure 8 1 1 1 Panel control circuitblock diagram 2 Working principle Panel components are divided into main panel and subsidiary panel Main panel is mainly composed of LCD screen display drive chip PT6554 and indicator light and subsidiary panel is mainly composed of power button power indicator light and remote control IR receiver LCD screen is aliquid crystal display screen Because liquid crystal screenis passive light emission display back light board is required to display S1 S16 are 16 data lines to display information of PT6554 on screen The function of U401 PT6554 is to process data signals sent from decode board to drive display screen to display the relevant status and scan panel buttons matrix atthe same time after processing buttons information send it to CPU in the means of digital signals to control the player to make the relevant action Pin 2 of remote control IR receiver H80038B3V is 5V power supply pin pin is grounded 1 is output pin remote control receiver processes buttons information of remote controller and outputs from pin 1 to decode board directly 8 1 2 MIC circuit 1 MIC circuit block diagram is shown inthe figure 8 1 2 1 U601 MIC1 amplifying U602 OK amplifying 5601 0601 2 ampli
22. 2 I S 5448678 A gt 0090003 SMD RESISTOR 1 16W 100 5 0603 R621 R622 0090009 SMD RESISTOR 1 16W 3300 5 0603 R601 0090012 SMD RESISTOR 1 16W 5600 5 0603 R604 0090014 SMD RESISTOR 1 16W 1 5 0603 R608 R625 R626 0090018 SMD RESISTOR 1 16W 3 3 5 0603 R630 0090224 SMD RESISTOR 1 16W 3 9 5 0603 R631 R632 0090184 SMD RESISTOR 1 16W 4 3 5 0603 R633 R634 0090020 SMD RESISTOR 1 16W 5 1 5 0603 R602 R613 R623 0090023 SMD RESISTOR 1 16W 10 5 0603 R606 R610 R635 R636 0090026 SMD RESISTOR 1 16W 22 5 0603 R603 0090030 SMD RESISTOR 1 16W 56 5 0603 R627 R628 0090034 SMD RESISTOR 1 16W 100 5 0603 R617 0310047 SMD CAPACITOR 50V 101 5 NPO 0603 C606 C607 C616 C617 98 MATERIAL CODE 0310066 0310072 0310207 0310222 0310543 0310234 0000339 0000134 0260094 0260025 0260200 0260327 0260027 0260096 0260175 0260037 0390095 0260237 0260352 0260201 0260021 0780085 1980018 o o Q o CD 1940024 2150295 1564176 2100010 1980046 MATERIAL NAME SPECIFICATIONS SMD CAPACITOR 50V 102 10 X7R 0603 50V 103 10 X7R 0603 50V 104 20 X7R 0603 25V 104 20 X7R 0603 50V 104 10 X7R 0603 16V 105 80976 2096 Y5V 0603 SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR CARBON FILM RESISTOR
23. 22 C6 7 C209 d 104 105 105 2 8 _28 20 9 YO 4 YMO 10 voc Y 9 TK 15 12 TK 16 13 Ya SL 17 SP C214 104 34 U21 DVDD18 1315 SL 18 SP Y5 FB 19 Y6 20 DMSO R201 10K DNO 16 E 21 MO VCC EMSO DVDS C304 _ 305 306 E RA4 TC218 30 S PWMOUTI V ADIN9 MAS 100uF 10V 104 104 TRSO 8203 TRO MAG 22 TRCLOSE R314 RO 42 FMSO 23 TROPEN 10K VPLLVSS MAS 24 REGOL 21022 0212 C213 CAPPAD TR B2 25 45 149 TRO 26 REGOD vip4 153 104 331 331 339 C316 VIPs 27 USBP DCKE 104 5 28 FOSO USBM DAK cus 252 USBVDDO USB VDD3 BBK SDN ADINS a 104 _ IOuE I6V TROUT TDIV ADINA TRIN M TMS ADINS SIBY TK 53 TRADING MAI IRCLOSE TDON ADIN7 89V33 VI8O DVDDI8 MAIO VPLLV33 2 36 BAI 57 Ad 5 5 RAS 60 oas CASH 7 69 j WE HIGHAO DQ AIS 63 19 IOAI9 LIMIT Dos e S ae 72 papa p gt es e TR B2 Q309 997 mpi L235 C244 245 0246 247 co48 249 250 SS8550 SS8550 SS8550 8043 lt e
24. 5 ______ N 2 5 1 He gt gt 9 5 5 95 BY 21 des 8 Sy BS E 2 cd 2252 12158 4 mm 5 as aS 1 1 5 lt lt 2 1 D E a Si 93 Chapter six List 94 MATERIAL CODE MATERIAL NAME SPECIFICATIONS LOCATION SMD RESISTOR 1 16W 2 2 5 0603 710 714 0090006 SMD RESISTOR 1 16W 750 5 0603 706 0090017 N A 1564337 lt 3 2 2 o ES lt 2 I S o wW gt AZ lt N 1 3 Ver3 1 0090324 1 16W 00 5 0402 R229 R318 R214 R213 0090445 1 16W 10 5 0402 R321 0090457 1 16W2 20 5 0402 R706 0090507 1 16W 4 70 5 0402 R301 R302 R303 mo ERES RR 0090005 1 16W 330 5 0603 R222 0100019 1 16W 330 5 8 RN201 RN202 0090336 1 16 750 5 0402 R224 R223 R246 R251 0090759 1 16W 1500 5 0402 0090350 1 16 3300 5 0402 0090356 1 16 5600 5 0402 0090362 1 16W 1 5 0402 0090014 1 16W 1 5 0603 0090377 1 16W 4 7 5 0402 0090020 1 16W 5 1 5 0603 R238 R240 R241 R242 R331 0090378 1 16W 5 1 5 0402 R326 0090023 1 16W 10 5 0603 R219 R221 R314 R201 R285 R288 R297 R309 R311 R313 0090385 SMD RESISTOR 1 16W 10 5 0402 R324 R329 R330 R364 R2105 R2109 R2 123 R2
25. 625P CGMS A WSS Closed Caption 13 Progressive Scan Video Automatic detect film or video source 3 2 pull down source detection Advanced Motion adaptive de interlace Minimum external memory requirement 14 Outline 216 pin LQFP package 3 3 1 8 Volt Dual operating voltages 3 Pin Definitions wae Te Dm mes m NN Current reference input It generates reference current RF 255 IREF Analog input path Connect an external 15K resistor to this pin and AVSS me mme gt omm eom s p oe _ meme foe 51 ERE MUN TUNE TISSU Pe me _ Analog input DC coupled main beam RF signal input C ef arn ec nan an it DC coupled sub beam RF signal output C meme Ew om orema ro soramea O w oe eem wm qmm m0 23 LDO1 Analog output Laser driver output ADC
26. Power 2 ADCVDD3 Analog 3 3V Power ADC VPLL 3 VPLLVSS Analog ground for VPLL VPLL External Capacitance connection Analog 3 3V Power for VPLL Reference voltage 3 28 V2REFO Reference voltage 2 8V m w pee rooson owes Analog monitor output 7 1 Central servo 25 CSO RFOP Analog output 2 Positive main beam summing output RFLVL RFON Analog output 1 RFRP low pass or 52 2 Negative main beam summing output NEN Ground Analog ground Analog output Focus error monitor output N CD Analog monitor output 6 pos TEZISLV RFVDD3 RFRPDC TROPENPW Analog output Tray PWM output Tray open output 6 JITFN 237 PLLVSS 238 IDACEXLP 239 PLLVDD3 240 LPFON 241 LPFIP 242 LPFIN CD CD CD CD 1 1st General PWM output PWMOUT1 Analog output 2 AD input 0 Tracking servo output PDM output of tracking servo Analog output compensator 53 Focus servo output output of focus servo FOO Analog output compensator LVTTL3 3 Input 1 Monitor hall sensor input FG Schmitt input pull up 2 AD input 1 Digital pin with analog input path 3 for ADIN1 General Power Ground 18 DVDD18 18 1 8V power for internal digital circuitry DVSS 1 81 ground pin for internal digital circuitry DVDD3 IB 3 3V power
27. SL VGND JK703B V OUTS 5 5 1 0 5 1 703 S VIDEO JK701 AV82 OATHS 29 HGOO IG VCS UOT 29S 18 A TE JIIFO C219 391 JITEN DV33 RFVDD3 DV33 PLLVDDB zs es 8 2 Sle als APLLVDD3_L203 R211 aL Ons e JE 3 2 H lt 5 C224 CVDI 23 238 C239 C229 ik 148 BIS IIT im 185 77 R209 ADV 121 0305 R311 TC203 alse 9 DVD 0V OF aS C240 TC204 D 3904 5 10K 222 153 105 104 100uF 10V Jay Alx x a m 105 220uF 10V CD 3 3V 16 gt 43 ES 89V33 MR Gela Ele e 5 E URL SIE xo m lala gt A lt lt gt 2310 2 Qe ee oe oo 59 oo 100K 236 Ex s su ala lt gt L 25 3018 209 0304 104 104 104 220uF 10V lt lala 2 afoot he fia ea lt lt cof ola 5 alkeene alt 217 TC201 Q303 2SK3018 S A Ei ES SISA een es ed et ER ELS SESS S SIS S 104 10uF 16V XS301 25 3018 5 VRC
28. Typ at 1 kHz Designed To Be Interchangeable With Raytheon RC4558 and RM4558 Devices 3 PIN CONFIGURATION oe me 3 5 14 function introduction to TDA1308 1 DESCRIPTION The TDA1308 TDA1308A is an integrated class AB stereo headphone driver contained 508 DIP8 or TSSOPS plastic package The device is fabricated in 1 mm CMOS process and has been primarily developed for portable digital audio applications The difference between the TDA1308 and the TDA1308A is that the TDA1308A can be used at low supply voltages 74 FEATURES Wide temperature range No switch ON OFF clicks Excellent power supply ripple rejection Low power consumption 2 o Short circuit resistant High performance signal to noise ratio high slew rate low distortion Large output voltage swing 3 PIN DESCRIPTION pom s mem o mmm s orm os orem E foe me 3 5 15 function introduction to PT6961 1 DESCRIPTION PT6961 is an LED Controller driven on a 1 7 to 1 8 duty factor Eleven segment output lines six grid output lines 1 segment grid output lines one display memory control circuit key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer Serial data is fed to PT6961 via a four line serial
29. adjust setting value C Press OK or LEFT button to return to Audio Setting page after adjustments are done 2 4 5 Playback DVD VCD SVCD Files Repeat Load effect 1 DVD set whether information of advertisement and warnings at the beginning of DVD disc 15 skipped to play the movie directly Always skip ads Optional setting Yes NO zi Default Number 2 VCD SVCD To set the PBC status When playing Super VCD or VCD2 0 discs if the PBC is ON the menu image displays Optional setting On Off Default On 3 Files data disc may probably includes Mp3 JPEG and MPEG4 formatfiles in which you may select DVD player to read the file type Optional setting Audio Picture Video Default Audio Picture Video 4 Repeat select the repeat playback mode Optional setting Off Single all Default Off 5 Load effect set the may to play JPEG image Optional setting Off from top from bottom Default Off 2 4 6 Karaoke Microphone Off Kar help No ast Volume 5 Echo 5 1 Microphone switch or off microphone Optional setting On Off Default Off 2 Kar help select accompany singing means Optional setting Channels L Channels Channels No ast Channels No voc Default Channels No ast 3 Volume A In microphone setup page press UP DOWN cursor to select Volume item and then press OK button to enterthe adjustment menu B Press UP DOWN cursor
30. error signal A C B D Trace error signal E F 2 Working principle 1 Laser tube loader DVD laser diode wave length is 650nm and that of CD laser diode is 790nm if wave length is between 370nm and 750 is visible light laser during the course of reading DVD disc is visible light and that if IR light when reading CD disc 2 Principle of laser head pick up signal laser beam projects onto disc vertically When focus of laser beam projects into disc laser beam will produce reflection and reach light detect device through reflection loop and switch into electric signals through photo epectric conversion The reflection loop produced in non pit information area and pin information area on discs are different and reflect into different areas of light detect device the photo elecric diode in different positions of light detect device will produce different signals to process light detect device diode signals and then produce digital signals 3 Focus and trace winding when laser head is reading signals normally information side should be in the focus of laser beam Because of disc error and some factors such as high speed rotation nd mechanical error laser beam will deviate from information side unavoidably to produce phenomena of deflection and de focusing focus and trace coil are added to adjust laser beam to make it focus in information area correctly 4 RF signal formation when reading disc normally light detect device will have 16
31. light and display when electronics strike it and responsible forthe display of character The function of 0401 V6312A is to process data signals sent from decode board to drive screen to display the relevant state and scan the panel buttons matrix at the same time after processing button information send to CPU in the means of digital signals to control the player to makethe relevant action Pin 2 of remote control IR receiver H80038B3V is 5V power supply pin 1 is grounded pin 3 is output pin after the receiver processes button information of remote controller it outputs from pin 3 to send to decode board directly 83 Section Three Servicing Cases 3 3 1 Servicing cases Example 1 Symptom no OSD Description there is picture and sound no OSD Analysis and troubleshooting use voltage level of multimeter to test 5V 9V 9V voltage of power board and they are all normal Check decode board socket XS201 5V voltage and it is normal each transmission data signal of decode board is normal check display screen power supply 21V on main panel and there is no voltage so we doubt that main panel 21V limiting resistor R418 has trouble use resistance level of multimeter to test the resistance value and it is infinite after changing it trouble is removed Example 2 Symptom STOP button has no function Description power on and read disc press PLAY button and there is function press PAUSE button again and there is functi
32. normal about 1 4V test pin 1 2 of Xs301 and voltage is also normal check nerve flat cable and touch is good soit is judged thatlaser head focus winding is burnt down after changing loader trouble is removed Example 5 Symptom power not on Description 5V 9V 9V 3 3V have no output Analysis and troubleshooting check power board and find that each path voltage has no output check and find that 220V voltage input is normal bridge rectification circuit has no voltage output use multimeter to test fuse tube and it has open circuit change fuse tube and trouble is not removed test anode of TC501 and there is still no voltage output fuse tube has been burnt down check 4 diode of bridge rectification circuit and they are all normal TC501 has no abnormalities of leakage and striken through test pin 1 and 8 of 050 switch IC and it has short circuit this has been stricken through after changing IC trouble is removed Example 6 Symptom power not on Description 5V 9V 9V have output bu 3 3V has no output Analysis and troubleshooting test each path voltage output of power board and find that there is no 3 3V voltage output check C510 TC506 TC505 L507 D507 and they are all normal check D509 cathode and find that there is no voltage output test D509 and find that it has open circuit after changing D509 trouble is removed Example 7 Symptom headphone has no sound Description audio video outpu
33. pin for internal digital circuitry DVSS 3 3V ground for internal digital circuitry Micro Controller and Flash Interface 48 ERN NENNT ENN RN ERN INNEN 54 In Out 4 16mA N o gt U U lt 4 gt 5 Flash address 18 SRPD SMT In Out 4 16mA Flash address 19 SRPD SMT 5 Flash address 20 IO In Out 4 16mA N 6 While External Flash size lt 1MB SRPD SMT 1 Alternate digital video YUV output 0 7 Flash address 21 In Out 4 16mA AN 8 While External Flash size lt 2MB SRPD SMT 1 Digital video YUV output 7 II GPIO In Out 4 16mA Microcontroller address latch enable SRPD SMT In Out 4 16mA N Flash output enable active low IO SRPD SMT In Out 4 16mA Flash write enable activ e low SRPD SMT In Out 4 16mA Flash chip select active low IO SRPD SMT 55 In Out 4 16mA Microcontroller write strobe active low SRPD SMT In Out 4mA Microcontroller read strobe active low SRPD SMT In Out 4 16mA Microcontroller port 1 2 SRPD SMT In Out 4mA Microcontroller port 1 3 SRPD SMT In Out 4mA Mi
34. scan mode Video out TV format Sharpness Gamma Brightness Contrast Hue Saturation 5 Press LEFT button if you want to return to the previous setup page 6 Press SETUP to exit the setup menu 2 4 2 Language Setup menu E DVD menu Za Soundtrack Sbutitles 1 Setup menu This item is used toset the prompts language on the screen Optional setting Russian English Ukrainian Default English 2 DVD menu To set the preference disc menu lang when playing Optional setting Russian English Estonian Latvian Kazakh Romanian Byelorussian Ukrainian Chinese Others Default English 3 Sountrack To set the preference audio language when playing Optional setting Russian English Estonian Latvian Kazakh Romanian Byelorussian Ukrainian Chinese Others Default English 4 Subtitles To set the preference subtitle language when playing Optional setting Off Russian English Estonian Latvian Kazakh Romanian Byelorussian Ukrainian Chinese Others Off 2 4 3 Image TV system TV scan mode Video out TV format Sharpness Gamma Brightness Contrast Hue Saturation 1 system This is used to the video output system of this unit Optional setting Auto PAL NTSC Default AUTO 2 TV scan mode To set Progressive scan Interlaced scan mode Optional settings Progressive Interlaced Default Interlaced 3 Video output To set the typ
35. side the stronger of the light emitted from light emitting diode and the larger of the photocurrent produced from position D The lower of the voltage inputted from the right side of photoelectric coupler the weaker of the light emitted from light emitting diode and the weaker of the current outputted from position D Figure 3 5 10 1 HS817 outside drawing 3 5 11 function introduction to AZ1086 LT1086 is designed to provide up to 1 5A output current shown as the figure 3 5 11 1 All internal circuitry is designed to operate down to 1V input to output differential and the dropout voltage is fully specified as a function of load current Dropout is guaranteed at several operating points up to a maximum of 1 5V at maximum output current Dropout decreases at lower load currents On chip trimming adjusts the reference ouput voltage to 196 Current limit is also trimmed minimizing the stress on both the regulator and power source circuitry under overload conditions T 4 TATALA SORA Vott 1 Bi iap R2 i Ri Figure 3 5 11 1 21086 outside drawing 3 5 12 function introduction to LM431A 0503 LM431A is 2 5V comparator shown as the figure 3 4 12 1 Compared the inputted voltage of R end with 2 5V when voltage of R end is more than 2 5V KA end is on and photoelectric coupler starts to send out photocurrent when voltage of R end is less than 2 5V KA end is cutoff
36. the advertisement warning and play the DVD directly 18 ANGLE Button Change camera angle 19 MENU Button Display DVD menu oropen close PBC 2 3 Accessories AUDIO VIDEO CORD 0 1PCS REMOTE CONTROL n 1 AAA SIZE 77 7777777777777 2 WARRANTY CARD vtm 1 USER MANUAL tt tt tM 1PCS KARAOKE DISC 77 7 7777 1PCS 2 4 FUNCTION SETUP 2 4 1 Function Setup 1 Press the SETUP button and the screen displays the selection menu of function setup Nu 7R Language Setup menu DVD menu Soundtrack Subtitle Image Sound Playback Karaoke Preference Parental control Initial setup Reset to defaults Exit 2 Press the CURSOR button to select the menu to be entered and press the OK or button to confirm Or press the CURSOR button to Exit item and then press the OK button to exit 3 Press UP DOWN arrow to select the desired item you want to set and press OK For example press UP DOWN arrows to select IMAGE and press OK The Image setting page appears on the screen 5 Video out S Vid TV format LB Sharpness L Off TV system Gamma Brightness Contrast Saturation 4 Press UP DOWN arrow to select the SHARPNESS item Press OK to confirm it And then press UP DOWN arrow to select the desired valus For example Press UP DOWN arrow to select Medium then press OK the TV screen display TV system TV
37. trouble is removed Example 2 Symptom no MIC Description after inserting microphone and speaking towards MIC there is no sound output but disc sound output is normal Analysis and troubleshooting after power on and inserting microphone use oscillograph to test OK signal of pin 2 of Xs302 and find that this has no OK signal when checking pin 7 output of MIC board U601 OK signal output is abnormal when inserting and unplugging microphone check DET detect signal and voltage is kept in 3 3V after changing MIC holder and trouble is removed Example 3 Symptom moise appears when power off Description at the moment of power off audio output had noise and TV speaker gives a bump sound Analysis and troubleshooting when this kind of problem appears trouble always occurs in power off noise removing circuit Firstly test MUTE Voltage of C knotof Q214 at the moment of power off and find that voltage of this point changes gradually from 7 8V to 0 5V use multimeter to test circuit elements around 0214 and find that 0204 1N4148 diode has been stricken through after changing it trouble is removed Example 4 Symptom not read DVD disc Description all other discs can be read exceptfor DVD disc Analysis and troubleshooting check laser head focus feed main axis and trace and they are all normal but there is no light emission Check voltage of emitter electrode of Q301 and itis 3 3V which is normal voltage of colle
38. 0 vague shape waveform that are superposed on A B C D through being superposed by adder inside light detect device output RF signals from RFO pin frequency when reading DVD disc is far higher than that when reading CD disc and output range is about 1 4V 247 3 2 2 Servo circuit 1 Servo system of this player adopts SANYO 65 loader and MTK decode solution MT1389HD FLASH 16M SDRAM 64M and its servo circuitis mainly composed offront end signal processing digital signal processing and digital servo processing digital signal processing IC MT1389E and drive circuit Am58888 in which Mt1389 is also the main part of decode circuit Servo circuit block diagram is shown inthe figure 3 2 2 1 Switch circuit circuit 5101 ABCD E F RFO MT1389 51 17 electric SL Main axis electric SP machine Open close circuit Main axis control detect circuit Figure 3 2 2 1 Servo circuit block diagram 2 Working principle after power on or close to proper position on loader frame for normal DVD as for PDVD on PCB at the lower part of door loader laser head begins to reset after laser head reaches proper position detect switch will give a signalto Mt1389 Mt1389 begins to output focus main axis and light emission signals machine begins to rotate laser head begins to identify disc information and decide whether disc is CD or DVD according to disc informat
39. 1 3 Headphone circuit 1 Headphone circuit block diagram is shown inthe figure 7 1 3 1 0603 TDA1308 5603 H L headphone amplifying 22 Figure 7 1 3 1 Headphone circuit block diagram 2 Working principle L H R signal of audio output end transmits to MIC board headphone amplifying circuit though Xs603 headphone amplifying circuit is mainly composed of 0603 TDA1308 Function of main pin of TDA1308 pin 1 7 are output pin pin 6 2 input pin Audio signals after being amplified output to headphone socket Jk601 directly 105 7 2 1 Servicing cases Example 1 Symptom not read DVD disc Description when playing DVD disc disc reading is not available Analysis and troubleshooting firstly check focus trace feed and main axis and they are all normal light emission head has light emitting check voltage of emitter electrode of Q301 and it is 3 10V which is normal voltage of collector electrode is 2 44V which is also normal so we doubt that loader has trouble after changing loader trouble is removed Example 2 Symptom display of screenis dark Description when power on part of screen has dark display and parthas bright display Analysis and troubleshooting check power supply of panel and each voltage is normal test voltage of two ends of screen and they are 7V and 19V which are normal so we judge that screen has trouble inside after changing display screen trouble is removed 10
40. 121 415 121 C416 121 C417 121 C418 121 C419 121 SEG7 SEGI D401 1N4148 07401 144148 a ez an m Yy D402 1N4148 R422 1K 5 na DZA02 1N4148 SEGII SEGI2 C431 151 C408 C409 C410 C412 C413 C420 C421 C422 C423 C424 C425 151 151 151 151 151 151 121 121 121 121 121 121 5 C434 151 SEG14 5 5 435 151 5 16 426 121 427 121 428 121 429 121 436 151 437 151 oo m 0 21 SEG7 20 SEG6 19 5 5 18 5 4 17 5 16 5 2 15 SEGI 14 13 R425 150R U403 HS0038B3V R406 R407 IK R408 409 1K VCC TC402 100uF 16V R411 R412 10K R415 100R TC407 100uF 16V R413 R414 10K 10K C438 151 GND C432 104 50V R418 10R 1 4W R417 10K 5 1 3 2 1 VCC yo R416 R410 10K 10K XS401 505 XS402 XS05 prog NVOS CCS 16 AGND R623 5 1K R603 22K TC617 4TuF 16V R631 3 9K TC618 47uF 16V 0602 80500 TC605 22uF 16V 1601 R64 FBSMT 6 105 R602 C603 5 1K 103 R608 R610 10K L C606 101 6 5 0601 4558 R606 10K Js TC601 10008 2 20601 62V 0 5W R601 330R C623 104 R622 TC616 4TuEl6V TC615 47uF 16V
41. 128 0090387 SMD RESISTOR 1 16W 12 5 0402 R323 0090389 SMD RESISTOR 1 16W 15 5 0402 0090391 SMD RESISTOR 1 16W 20 5 0402 0090394 SMD RESISTOR 1 16W 27 5 0402 0090395 SMD RESISTOR 1 16W 30 5 0402 R287 R227 R337 R340 R381 R2160 R2161 R239 R232 R233 R286 R2103 R2104 R2135 R 2146 R208 R220 R2117 R2122 R202 R211 R325 R203 R204 R2111 R2116 0090034 SMD RESISTOR 1 16W 100 5 0603 R210 0090012 SMD RESISTOR 1 16W 5600 5 0603 R207 0090408 SMD RESISTOR 1 16W 100 5 0402 95 4 MATERIAL NAME SPECIFICATIONS LOCATION SMD RESISTOR 1 16W 150 5 0402 R319 R320 SMD RESISTOR 1 16W 680 5 0402 R317 R322 0090412 0090429 0090668 0390453 0310415 0310418 0310424 0310432 0310392 0310207 0310726 0310234 0310493 0310201 0310454 0310394 0310068 0310570 0310482 0310362 0310795 0310794 PRECISION SMD RESISTOR SMD MAGNETIC BEADS SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR SMD CAPACITOR 255 256 283 288 2111 2116 102 10 X7R 0402 216 218 230 235 244 252 27 0 50 104 20 7 0603 2 302 306 C207 C209 C211 C214 C225 C227 C229 C236 C253 C2
42. 1N4148 2 D210 1N4148 2 1227 1 8uH VIDEO CVBS D211 1N4148 2 C288 101 VGND D212 1N4148 2 5 1231 1 8uH VIDEO B U D213 1N4148 2 C292 121 VGND 5 D214 1N4148 2 R2111 30K R2160 R2135 TC246 89 AR TC240 10uF 16V 102 10uF 16V U209B 4580 0205 2SC1815 YS R2112 30K R2161 100K Q206 TC247 a 89 AL 25 815 5 1K TC241 10uF 16V 10uF 16V R2139 TC248 80 ARS TC242 10uF 16V R2149 100K 0207 2SCI815 YS Q208 ascisis vs R21 249 89 ALS 68 TC243 10uF 16V 102 10uF 16V R2143 TC250 89_SW C2121 TC244 102 10uF 16V 10uF 16V Q209 2SCI815 YS Q210 28 815 5 R2146 TC251 89 CIR TC245 10uF 16V C2122 10uF 16V R2103 0213 0212 2SCI815 YS TC235 100uF 10V AGND 77 1N4148 R2105 R2108 R2109 10K 10K IN4148 144148 SPLRCK U2RST ALRCK 8 7 ums ACK 6 AMDAT 5 DV33 U203 CS5340 TC220 10uF 16V NC 104 49V A9V 2138 CIT 104 104 104 100uF 16V AGND 9V A9V C2146 C2147 C2148 TC223 104 104 104 100uF 16V AGND DV33 RN202 33R DV33 SLRCK SACLK AMDATA C2158 06 4 27406 154148 07405 134148 5 27404 14148 VFDI6 07403 154148 0604 430 151 SEG6 C414
43. 2 Trap value in power on reset PD SMT 1 1 use external 373 II 0 use internal 373 In Out 4mA 1 Audio bit clock SMT 2 Phase de modulation In Out 4mA Audio DAC master clock SMT 1 Audio serial data 0 Front Left Front Right 2 DSD data left channel In Out 4mA 3 Trap value in power on reset ASDATAO PD SMT 1 1 manufactory test mode II 0 normal operation 4 While using external channels GPO_2 2 Audio serial data 0 FrontLeft Front Right 2 DSD data right channel 3 Trap value in power on reset In Out 4mA ASDATA1 1 1 manufactory test mode PD SMT II 0 normal operation 4 While using external channels 1 GPO 2 1 Audio serial data 1 Left Surround Right Surround 2 DSD data left surround channel In Out 4mA ASDATA2 3 Trap value in power on reset PD SMT e 1 1 manufactory test mode 0 normal operation 57 4 While using external channels GPO 1 1 Audio serial data 2 Center LFE 2 DSD data right surround channel 3 Trap value in power on reset In Out 4mA 1 1 manufactory test mode PD SMT 0 normal operation 4 While only 2 channels output 1 GPO 0 1 Audio serial data 3 Center back Center leftback Center right back in 6 1 or 7 1 mode INT1 In Out 4mA 2 DSD data center channel ASDATA4 PD SMT 18 While only 2 channels output 1 Digital video YUV output 6 GPIO 1 Microphone serial input INT2 In Out 2mA 2 While not support Micropho
44. 52 DPAK plastic package 2 Features Three Terminal Adjustable or Fixed Voltages 1 5V 1 8V 2 5V 2 85V 3 3V and 5 0V Output Current of 1A Operates Down to 1V Dropout Line Regulation 0 295 Max Load Regulation 0 496 Max SOT 223 and TO 252 package available 3 PIN DESCRIPTION _ Voltage input 77 Chapter Four Disassembly and Assembly Process DVD players manufactured in BBK are largely identical but with minor differences and are mainly composed of loader components control panel components decode and servo board components power board components power amplifier board components MIC board components and AV board components In order to speed up the compilation of Service Manual we shall not give repeat explanation to model with minor differences in chapter four Disassembly and Assembly Process for the later compiled service manuals For disassembly and assembly process in this chapter please refer to chapter 4 of DK1005S Service Manual or DK1020S Service The pictures of this model are shown asfollows 78 Chapter Cinque PCB board amp Circuit diagram Section One PCB board 5 1 1 Surface layer of KEY SCAN Board 79 5 1 2 Bottom layer of KEY SCAN Board 80 5 1 3 Surface layer of DECODE amp SERVO Board is E
45. 54 C261 C265 C279 C281 C301 C313 C314 C316 C333 C334 C338 C339 C345 C346 C2131 C2149 C2158 C2 137 2148 2150 2152 295 340 344 290 292 294 210 268 310 311 16V 104 10 X5R 0402 0390452 SMD MAGNETIC BEADS 16V 333 10 X7R 0402 C226 PZ3216D121 L212 0390095 SMD MAGNETIC BEADS 0390444 SMD MAGNETIC BEADS 0390385 SMD INDUCTOR 0390355 SMD INDUCTOR 0390096 SMD INDUCTOR 0700113 VOLTAGE REGULATOR 9 1V 5 1 2W D217 DIODE 0700004 Soo cen REGULATOR 5 1 5 1 2W D205 D208 D218 D220 D222 96 0700007 D201 D203 D204 D215 D216 0780040 3904 100 300 SOT 23 Q305 02607829 TC204 TC209 TC301 TC304 TC305 02607819 CD CD11C 10 1000 20 5 11 C2 5 BELT 6309 1629 5 238 02607809 CD11C 10 471 20904 7 2 5 208 219 302 303 mu TC201 TC202 TC205 TC206 TC215 TC24 0 252 1940094 CABLE SOCKET 24P 0 5mm SMD SUBMIT MEET WITH 1 CLASP 1940022 SOCKET 4P 2 0mm XS203 SA 001 012 BLACK IRON 1910129 TERMINAL SOCKET PIECE SCREEN SHIELDED JK703 1910079 TERMINAL SOCKET AV8 8 4 6G 3 JK701 DV717SI 2 SILVER 1389HD 97 _ 1340064 LIGHT TOUCH RESTORE SWITCH 1940022 SOCKET XS403 FLAT CABLE XS401 7 5P160 2 0 2 PIN WITH FLAT CABLE NEEDLE TOGETHER DIRECTION 5 CORD 2122066 2122272 s lt BN 3 2 EJ 2 o I lt m
46. 6 7 2 2 Troubleshooting flow chart 1 Troubleshooting process for Power noton is shown inthe figure 7 2 2 1 Power not on Whether power switch is normal Change power switch Whether display screen is normal Check relevant circuit Whether 5201 socket is normal Normal Figure 7 2 2 1 Troubleshooting chart for Power noton Weld each pinagain 107 2 Troubleshooting process fir Not read disc is sown the figure 7 2 2 2 Not read disc Whether nerve line isnormal from loader nerveline are normal N Y Change nerve line A B C D signals on two endsof C201 Change relevant capacitor C202 C203 C204 Whether DMO FMO TRO FOO output ofMT1389 is normal Change MT1389 Whether R201 R204 resisto and 210 213 are normal Change relevant resistor and capacitor z Whether SP SL FC TK outputted byAm5888 Change 5888 are normal Whether focus and trace signals output to nerve line Whether 5307 socket pinis normal N man Change nerve linejack Weld pin again socket Whether two ends ofnerve line have focusand trace signals Whether protection point of loader is welded out Weld out protection point Change nerve line Whether disc reading is normal after changing loader Normal Figur
47. CH RESTORE SWITCH KFC A06 2WB 13 8 0200307 PORCELAIN CAPACITOR 50V 101 10 SHAPED 5mm 2100003 LEAD F0 6 SHAPED 7 5mm 0620076 RADIATION DIODE 3B3HC COLORLESS WITH BLUE 3028526 LED LEFT DV717SI 2 SILVER 1389HD PROGRAM FLASH ROMDVT717SIRU2 0A 16M 0911764 IC 29LV160BE 70PFTN TSOP 921410000 M29W160EB 70 6 921410000 5901 K901 g 5 EX N C901 C902 JP901 JP902 LED901 LED90 0881650 0881651 102 DV723Sl Service manual Decode board power board and AV output board circuit of DV723SI is the same with that of 0 717 1 2 and refer to DV717SI 2 relevant circuit explanation for details The difference of DV723SlI and DV717SI 2 is that main panel display screen adopts LED screen control IC is Pt6961 and USB jack is added otherwise The differences of DV723SI and DV717SI 2 are introduced as follows 103 7 1 1 Panel control circuit 1 Panel control circuit block diagram is shownin the figure 7 1 1 1 Remote controller Digital potentiometer CLK STB SDA Drive light emitterdiode LED4031 LED404 Figure 7 1 1 1 Panel control circuitblock diagram IR receiver Decode board 2 Working principle Panel is mainly composed of LED screen drive chip Pt6961 IR receiver of remote controller buttons and indicator light LED screen is the display module composed of LED light emission character segment GRID1 GRID7
48. D M gt 1 220uF 10V 1316 CM 105 KIL dira 8 5 LDV3 DV3 8 RFVIS 89V33 8 DACVDD3 2301 35 FBSMT lt lt S 8 B C0 105 On gt A A A ux x lt lt wv 426 TR 1630 E a lt ag 34 lt SS 862 ATuF 10V C230 A 203 ses lt lt d X 192 3 6 1000 104 28 YUVI 0301 D 0204 105 aa 2SB1132 S Yuv2 C205 105 6 E R302 LPV33 LDV33 LDV33 7 YUV3 1308 FSSMT 4 8 9 12 120 47 TC308 C345 C346 B 47uF 10V A 10 F IDOI 104 104 D YUV5 302 YUV6 5 89_VSYNG YUV7 89_HSYNC 4 1 16 hes IO 17 207 319 0320 0 4 2 19 23 104 _ 105 105 Dum 2581132 2 Em gt cul cus 1002 C208 IDOI 4 C302 C303 104 105 105 STIS 104 104 5 5 C5 Fo cazul c32 26
49. Digital Video output Y bit In Out Non pull 2 GPIO IO 14 RD 1 Digital Video output Y bit In Out Non pull 2 GPIO 15 RD 1 Digital Video output Y bit 6 In Out Non pull 2 GPIO 16 RD 1 Digital Video output Y bit 7 In Out Non pull 2 GPIO ome mme ome ome o oo ome pn E E EN EE o B RE pvr _ 62 gt mem m oe a ow o0 em m oo ven f ew ven ms a m e om mee 0000000 m om om m m JTAG Interface 4 1 Serial interface port 3 data out TDI V ADINA In Out Non pull 2 Version AD input port 4 3 GPIO 1 Serial interface port 3 data out TMS V ADIN5 In Out Non pull 2 Version AD input port 5 3 GPIO 1 Serial interface port 3 data out TCK V ADING In Out Non pull 2 Version AD input port 6 3 GPIO 1 Serial
50. H1 50 0mV M 25015 CH1 22 5mVv Current Folder is 4 DMO signal when there is main axis rotation waveform diagram of pin 37 of 0201 Mt1389 Tek RUM Stop Pos 0 0005 SAVE REC 1 Saving Images Select Folder Save TEKOO04 BMP CH1 500m 10 015 47 225mV Current Folder is A 5 FMO signal whenthere is feed waveform diagram of pin 38 of U201 MT1389 Tek Stop M Pos 0 0005 SAVE REC About saving Images 1 Select Folder Save CH1 500my M 25 05 CH1 Z 52 5 Jan 06 09 24 lt 10Hz 41 6 TRO signal when there is trace waveform diagram of pin 41 of 0201 MT1389 Tek aT Stop Pos 0 0005 SAVE REC Action File Format About 1 Saving Images Select Folder Sawe 0007 CH1 10 mVv M 1 005 CH1 345mVv Current Folder is 7 FOO signal when there is focus waveform diagram of pin 42 of U201 MT1389 Tek Stop M Pos 0 000s SAVE REC About Saving Images 1 Select Folder Save 0008 CH1 100 M 1 0015 CH1 345mVv 5 06 03 26 1 23833MHz 8 Waveform diagram of pin 29 when no disc of U207 FLASH Tek M Stop M Pos 0 0005 SAVE REC Action Save Image File Format About Saving Images Select Folder Save CH1 1 00 M 250ns CH1 7 34 5mV 5 06 03 30 l
51. H2 28 4 23 05 20 30 47 333 2 14 SDATAO waveform diagram for mixed left right channel digital signal Tek ZI Stop M Pos 0 0005 SAVE REC Action Save Image File Format About Saving Images Select Folder Save TEKOOQ3 BMP CH2 100v 250 5 CH2 2 1 627 23 05 11 50 527 07 6kHz 44 15 SDATA1 waveform diagram for surround left right channel digital signal now the disc being played is 2 1CH andthis signal has nooutput if 5 1CH the form is the same with that of SDATAO Tek Ms e Stop M Pos 0 0005 SAVE REC Action Image File Format BMP About Saving Images Select Folder Save TEKOO13 BMP CH1 1 00V M 5001 CH1 1562mVv 4 06 08 38 lt 10H2 16 SDATA2 waveform diagram for centre subwoofer digital signal Tek Al Stop Pos 0 0006 SAVE REC Action Save Image File Format About Saving Images Select Folder Save TEKOOOS BMP CH2 1 00 100 CH2 2 1 68V Current Folder is 17 1KHZ audio signal output waveform diagram test disc is recommended to use if not the test waveform will change atany time to affect judgment Tek BU Trig d M Pos 0 0005 SAVE REC Action Save Image File Format About 1 Saving Images Select Folder Save CH1 50 0mV M 50015 CH1 1 01mVv 20 06 20 01 1 05822kHz 45 18 LEF waveform di
52. Out 4mA 170 B CB PB Blue CB PB or SC SR R CR PR In Out 4mA Red CR PR CVBS or SY DACVDDC 60 p pM MISC 12 In Out 108 PRST Power on reset input active low PD SMT o e Dm mu 0000000 000 Le erem memmm _ Dm me o mme m Dram Interface 58 Sorted by position IO O RD1 1 Digital Video output C bit O 176 In Out Non pull 6 2 GPIO IO 1 RD1 1 Digital Video output C bit 1 175 C 1 In Out Non pull 7 2 IO 2 RD1 1 Digital Video output C bit 2 8 2 GPIO IO 3 RD1 1 Digital Video output C bit 3 In Out Non pull 9 2 GPIO 4 RD2 1 Digital Video output C bit 4 In Out Non pull 0 2 GPIO IO 5 RD2 1 Digital Video output C bit 5 In Out Non pull 1 2 GPIO IO 6 802 1 Digital Video output C bit 6 In Out Non pull 2 2 GPIO IO 7 RD2 1 Digital Video output C bit 7 In Out Non pull 3 2 GPIO DQM2 In Out Up GPIO IO 8 DQ 1 Digital Video output Clock In Out Pul Up M3 2 GPIO 61 IO 9 RD2 1 Digital Video output Y bit In Out Non pull 2 GPIO IO 10 RD 1 Digital Video output Y bit In Out Non pull 2 GPIO IO 11 RD 1 Digital Video output Y bit Non pull 2 GPIO IO 12 RD 1 Digital Video output Y bit In Out Non pull 2 GPIO 13 RD 1
53. Q214 and find that 0204 1N4148 diode has been stricken through after changing it trouble is removed 37 3 3 2 Troubleshooting flow chart 1 Troubleshooting process for Power is shown inthe figure 3 3 2 1 Power not on Power on and check whether power on picture displays Whether 3 3V 5V on power board are normal Whether L517 D510 arenormal Change L517 D510 Whether 1 8V on decode board is normal Whether transformer is normal Change Q306 Whether MT1389 SDRAM 3 3V on FLASHare normal Whether U501 is normal Check each path N gt Change transformer Change U501 Whether rectification circuit is normal Whether AM5888 is normal Change AM5888 Change D501 D504 Change firmware Figure 3 3 2 1 Troubleshooting chart for Power noton 38 2 Troubleshooting process for Not startup is shown inthe figure 3 3 2 2 Not start up Disconnect Whether Whether 507 D510 andchec m Change transformer aco whether positive d is normal voltage is V Y Y Change TC505 TC506 C510 Change D510 Whether decode board N 0202 power supply 3 3 Check 3 3V powersupply is normal circuit Whether SCL SDAdata Whether clock of U202is 27M crystal oscillator Change crystal osc
54. Ree 5 iii RES m 2E Open disc tray 4 74 5 05 4 74 4 76 0 2 4 76 4 76 4 33 4 76 4 76 5 02 4 76 5 06 Close disc tray 4 74 4 33 4 74 4 76 5 05 4 76 5 4 76 5 03 4 76 4 79 0 2 4 79 5 06 0308 0309 State Base electrode B Collector C Enittor E Base electrode B Collector C Enittor E pe s Open disc tray 0 0 93 0 4 76 0 2 4 76 4 79 5 02 4 79 EM Close disc tray 85 4 76 5 05 4 76 0 0 93 0 4 79 0 2 4 79 ESN 222 5 5 06 proper pos ition 5 06 06 State OUT Base electrode B Collector C Enittor E Open disc tray to proper pos ition 3 2 6 Main axis control circuit 0 3 12 0 1 axis control circuit is shown in the figure 3 2 6 1 C307 222 OPO R318 0R ADIN R317 680K MT1389 R322 680K Figure 3 2 6 1 Main axis control circuit diagram 2 Function disc is always in high speed rotation state when machine is reading discs when it is necessary to open door and change another disc MT1389 stops giving positive phase drive signals to main axis drive circuit but disc is still rotating due to the function of inertia Ifthe action of opening door is carried out atthis moment disc will worn so the machine must apply brake to main axis Whether disc has stopped rotating or whether it is rotating reversely decode chip cannot judge so a main axis control circuit is a
55. SR 2 Analog chroma output DACVSSB Ground Ground pin for VIDEO DAC circuitry Output 1 Video data output bit 3 187 YUV3 CVBS SR 2 Analog composite output DACVDDA 3 3V power pin for VIDEO DAC circuitry Output 1 Video data output bit 4 185 YUVA Y G 4MA SR 2 Green DACVSSA Ground Ground pin for VIDEO DAC circuitry Output 1 Video data output bit 5 183 YUV5 B Cb Pb 4MA SR 2 Blue or CB 59 Output 1 Video data output bit 6 R Cr Pr 4MA SR 2 Red or CR 1 Vertical sync input output 2 While no External TV encoder Output V_ADIN1 1 Vertical sync for video input 4MA SR II Version AD input port 1 GPIO 1 Video data output bit 7 2 While no External TV encoder INT3 Output 1 Microcontroller external interrupt 3 ASDATA 4MA SR Audio serial data 5 part Il DSD data sub woofer channel or Microphone output GPIO 1 Horizontal sync input output 2 While no External TV encoder INT4 Output 1 Horizontal sync for video input V_ADIN2 4MA SR Version AD input port 2 GPIO IV Microcontroller external interrupt 4 Video Interface 12 In Out 4mA CVBS Analog composite output DACVDDB Power 3 3V power pin for video DAC circuitry DACVSSB o Ground Ground pin for video DAC circuitry DACVDDA Power 3 3V power for video DAC circuitry In Out 4mA Green Y SY or CVBS 168 Y G SR DACVSSA Ground Ground pin for video DAC circuitry In
56. V power supply 3 5 6 function introduction to 4580 1 Description The 4580 is the dual operational amplifier specially designed for improving the tone control which is most suitable for the audio application Featuring noiseless higher gain bandwidth high output current and low distortion ratio and it is most suitable not only for acoustic electronic parts of audio pre amp and active filter but also for the industrial measurement tools It is also suitable for the head phone amp at higher output current and further more it can be applied for the handy type set operational amplifier of general purpose in application of low voltage single supply type which is properly biased of the low voltage source 2 PIN DESCRIPTION HN om m CNN RN NENNEN NN pom m 3 5 7 function introduction to 58885 1 Description The 58885 is a five channel BTL driver IC for driving the motors and actuators such as used in DVD player and consists of two independent precision voltage regulators with adjustable range from 1 5V to 4 V It supports a variety of applications Also Pb free package is selectable Please refer to Marking Identification 2 Fetures Two channels are voltage type BTL drivers for actuators of tracking and focus Two channels are voltage type BTL driver for sled and spindle motors It is also
57. acitance is very small the meantime nowthe integrated IC is very much easy to be struck through by static electricity or the performance will decrease Thus static electricity prevention is of extraordinary importance The following are several measures to prevent static electricity 1 Use a piece of electric conduction metal with the length of about 2 metres to insert into the earth and Fetch the lead wire from the top of the surplus metal and connect to the required static electricity device The length and depth of the metal embedded under the earth should be determined according to the wettability of the local soil For humid places it may be shorter and longer and deeper for dry places If possible it can be distributed and layed in terms of shape 2 On operating table board the antistatic table cushion should be covered and grounded 3 All devices and equipments should be placed on the antistatic table cushion and grounded 4 Maintenance personnel should wear antistatic wrist ring which should be grounded 5 Places around the operating position should also be covered with electric conduction cushion or Painted with antistatic paint 1 1 3 Precautions for laser head 1 Do not stare at laser head directly for laser emission will occur when laser head is working which will Hurt your eyes 2 Do not use wiping water or alcohol to clean laser head you may use cotton swab 1 1 4 About placement position 1 Neve
58. adjusted In this process it is objective but the entire pick up that moves forwards or backwards and the moving range is very small 3 FMO similar to acts of trace the acts of feed are larger than those of trace Feed conducts a large scale movement firstly and then trace moves slightly in this range Feed moves for a while and does not move for another while but trace moves all the time Feed is rough adjustment and trace is fine and acts are obvious when power on and selecting tracks 4 DMO it is the top that holds up disc Its rotation speed decides that of disc Its rotation is generated by an individual DC electric machine in which rotation speed of DVD is twice overthat of CD 19 3 2 3 Laser power control circuit 1 Laser power control circuit is shown inthe figure 3 2 3 1 LDV33 R301 4 7R Q301 2SB1132 S MD1 xs301 5 VD _ MT1389 6 Q302 2SB1132 S 4 7R R302 LDV33 Figure 3 2 3 1 Laser power control circuit diagram 2 Working principle Pin 20 21 of Mt1389 is laser power detect input pin pin 21is DVD laser power strong weak detect signal input pin 23 is VCD laser power drive control output pin and pin 22 is DVD laser power drive control output pin When reading VCD discs laser power becomes weak voltage of MDI pin decreases voltage of pin 23 of Mt1389 decrease to make voltage of pin 19 of Xs301 increase to reach the purpose of promoting laser
59. agram for subwoofer channel analog signal Tek m p Trig d M Pos 0 0005 SAVE REC About 1 Saving Images Select Folder Save TEKOOQ2 BMP CH1 50 0m M 1 00ms CH1 47 0 004 25 Apr 06 10 13 33 3053Hz 19 AMDAT waveform diagram for microphone signal after 5340 A D conversion About Saving Images Select Tek IL Stop Pos 0 0005 Folder Save TEKOO11 BMP CH2 100v M 5 00us CH2 47 1 5mV 23 05 14 56 lt 10Hz 20 SPDIF waveform diagram for optical coaxial digital audio signal Tek EIS Stop Pos 0 0006 SAVE REC Action Save Image File Format BMP About Saving Images Select Folder Save 2 5 0mVv 1 005 CH2 27 20 7 Current Folder is 46 21 27 signal waveform diagram Tek Al Trig d M 0 0005 SAVE REC Action m 1 Saving Images 1 Select Folder Save YPP4 6 CH1 1 00 25 0ns CH1 1111V 23 Mar 06 17 04 26 9978MHz 22 Reset circuit waveform diagram Tek Ji Al Ready M Pos 0 0005 SAVE REC URST i About Dv33 Saving Images Select Folder Save 8 gp CH1 1 00 2 2 00 M 10 0ms CH1 760m Current Folder is A 247 Section Five Function Introduction to IC 3 5 1 function introduction to MT1389HD 1 Description MT1389HD is a co
60. al automatic laser power control Defect and blank detection RF level signal generator 3 Speed Performance on Servo Channel Decoding DVD ROM up to 4XS CD ROM up to 24XS 4 Channel Data Processor Digital data slicer for small jitter capability Built in high performance data PLL for channel data demodulation EFM EFM data demodulation Enhanced channel data frame sync protection amp DVD ROM sector sync protection 5 Servo Control and Spindle Motor Control Programmable frequency error gain and phase error gain of spindle PLL to control spindle motor on CLV and CAV mode Built in ADCs and DACs for digital servo control Provide 2 general PWM Tray control can be PWM output or digital output 6 Embedded Micro controller Built in 8032 micro controller Built in internal 373 and 8 bit programmable lower address port 1024 bytes on chip RAM Up to 2M bytes FLASH programming interface Supports 5 3 3 Volt FLASH interface Supports power down mode Supports additional serial port 7 DVD ROM CD ROM Decoding Logic High speed ECC logic capable of correcting one error per each P codeword or Q codeword Automatic sector Mode and Form detection Automatic sector Header verification Decoder Error Notification Interrupt that signals various decoder errors Provide error correction acceleration 8 Buffer Memory Controller Supports 16Mb 32Mb 64Mb SDRAM Supports 16 bit SDRAM data bus 49 Provides the selfrefresh mode SDRAM Block based sector addressing 9 Video D
61. and photoelectric coupler does not send out photocurrent CPU 3 3V in power board circuit must be kept in 3 3V for the function of comparator No matter more than or less than 3 3V through on and off status of comparator it will control the on state of the output end of photoelectric coupler LM431A to adjust the output space occupation ratio of switch module to control the output voltage of transformer and masthead the power A Figure 3 5 12 1 LM431A outside drawing 3 5 13 function introduction to 4558 1 Description The 4558 and 4558 devices are dual general purpose operational amplifiers with each half electrically similar to the A741 except that offset null capability is not provided The high common mode input voltage range and the absence of latch up make these amplifiers ideal for voltage follower applications The devices are short circuit protected and the internal frequency compensation ensures stability without external components The RC4558 is characterized for operation from 0 C to 70 C and the RM4558 is characterized for operation over the full military temperature range of 55 C to 125 C 73 2 5 Continuous Short Circuit Protection Wide Common Mode and Differential Voltage Ranges No Frequency Compensation Required Low Power Consumption NoLatch Up Unity Gain Bandwidth 3 MHz Gain and Phase Match Between Amplifiers Low Noise 8 nVPlz
62. built in one channel bi direction DC motor driver for tray Wide dynamic range 9 0 typ when 1 Vcc2 12V at RL 20 load Separating power of Vcc1 and Vcc2 is to improve power efficiency by a low supply voltage for tracking focus and spindle Level shift circuit built in 68 Thermal shut down circuit built in Mute mode built in Dual actuator drivers A general purpose input OP provides differential input for signal addition The output structure is two power OPAMPS in bridge configuration Sled motor driver A general purpose input OP provides differential input for signal addition The output structure is one power OPAMP in bridge configuration Spindle driver Single input linear BTL driver The output structure are two power OPAMPS in bridge configuration Tray in out driver The DC motor driver supports forward reverse control for tray motor 2 Built in regulator controllers Adjustable range 1 5V 4V 3 PIN DESCRIPTION o owe 00 O ee TT IUUD N ET me wm Focus driver output o Tracking driver output mw ro o xm CC Ce 69
63. cation gt Absorption loop 5V Rectification Rectificatio ey Rectificatio i FL FL i J9UJ10JSUPJ HOST GND Power grib filtering Switch IC Feedback winding Photoelectric coupler Sampling 431A circuit Rectification tering i Power socket Figure 3 2 12 1 Power circuit block diagram 2 Working principle 1 Power grid filtering circuit various electromagnetic radiation exits in surrounding so it will produce interference to inputted AC current The function of power grid filtering circuit is to filter there interferences to make those that enter bridge rectification circuit are comparatively pure 220V AC power 2 Bridge rectifying and filtering circuit the function of this circuit is to switch city power into DC power Voltage after rectifying and filtering is 1 414 times of input power so the DC voltage on two ends of TC501 is equal to 300V 3 Absorption loop power always works in on off state so very high peak voltage will produce in the course of power on off Inorder to protect switch IC better a peak absorption loopis added 4 Filtering circuit the function is to produce a comparatively stable and small ripple DC voltage In filtering circuit II type filter is adopted most of the time The features of capacitor filtering are that when load resistance is high and current is small filtering is obvious as for inductor filter
64. crocontroller port 1 4 SRPD SMT In Out 4mA Microcontroller port 1 5 SRPD SMT In Out 4mA 1 Microcontroller port 1 6 SCL SRPD SMT 2 clock pin In Out 4mA 1 Microcontroller port 1 7 SDA SRPD SMT 1 2 data pin In Out 4mA 1 Microcontroller port 3 0 RXD RXD SCL RXD SDA SRPD SMT 2 8032 RS232 RxD In Out 4mA 1 Microcontroller port 3 1 e SRPD SMT 2 8032 RS232 TxD 1 Microcontroller port 3 4 In Out 4mA 2 Hardwired 0232 RxD SRPD SMT 3 clock pin 1 Microcontroller port 3 5 In Out 4 16mA 2 Hardwired RD232 TxD SRPD SMT 3 data pin Input SMT IR control signal input In Out 4 16mA Microcontroller external interrupt 0 active low SRPD SMT Audio interface 28 1 Audio DAC master clock of SPDIF input 2 While SPDIF input is not used SPMCLK In Out 1 Serial interface port 0 clock pin GPIO 1 Audio data of SPDIF input SPDATA SDINO In Out 2 While SPDIF input is not used 56 1 Serial interface port 0 data in GPIO 1 Audio left right channel clock of SPDIF input SPLRCK SDOO In Out 2 While SPDIF input is not used 1 Serial interface port 0 data out 1 GPIO 1 Audio bit clock of SPDIF input SDCSO 2 While SPDIF input is not used ASDATA In Out 1 Serial interface port 0 chip select 5 Audio serial data 5 part DSD data subwoofer Channel or Microphone output GPIO 1 Audio left right channel clock In Out 4mA
65. ctor electrode is 2 2V which is also normal test inductor L312 between collector electrode and pin 2 of Xs301 and find that inductor has open circuit after changing inductor trouble is removed 118 8 3 1 PCB board 1 Surface layer of KEY SCAN Board 119 2 Bottom layer of KEY SCAN Board 120 3 Surface layer of MIC Board 121 4 Bottom layer of MIC Board 122 35V R412 75 V404 8050D R413 422 5V R423 0404 560R LMII7 V405 8550 TC402 R424 4 16 100R LEDI REQUIER 4V TO LIGHT 45V 45V A R402 R403 47R 4 7K LED403 45V TC401 C404 18404 C401 ATuF 16V 681 103 KD 45V ED401 P1 S1 1 P2 S2 2 5 53 3 1 55 5 2 56 6 3 57 T 4 58 38 R419 8420 5 59 9 ps H7K 47K gt 6 510 1 S 3 513 B XS SI 516 16 518 XS402 XS06 NYOS A3M 2 2 8 R609 10K 8607 ERE TC605 IK C605 100p 22 IVA gt MIC602 9 2 TC603 se TC601 R603 2 4 TuF 16V 07 4 TuF 560R 1 4 R623 oy 3 197 0 5 U601A gt nc R601 C603 8605 4558 VR602 TC613 nd 20K 103 10k 49VA 10K 479 4558 R608 TC606 MIC601 22uF 16V 9 VD601 vox 184148 TC604 VD603 4 7uF 16V IN4158 c E 5g S uu AE
66. dded to make decode chip can effectively monitor whether disc has stopped rotating 3 Working principle MT1389 has a built in comparator composed of operational amplifier in which OP is the in phase input end OP is reverse input end OPO is output end When playing normally electric machine is rotating in positive direction voltage of OP is higher than OP voltage of OPO is more than 1 4V When it is necessary ti open disc door main brake signals stop electric machine is eternal magnet so when rotating inductive electromotive force produces on two ends through R320 R319 sampling to give to decode chip to make OPO output voltage lower than 1 4V and transmit to MT1389 ADIN input pin through R318 when ADIN is high level main axis does not make any acts when 23 ADIN is low level MT1389 outputs instant electric machine reverse braking signal to make main axis electric machine speed down and such cycling goes on until main axis stops rotating PDVD is manual means for door opening so disc is still rotating after disc dooropening but will stop soon 4 Key point voltage unit V is shownin the following table p 3 2 7 Decode circuit 1 Decode circuit block diagram is shown inthe figure 3 2 7 1 MT 1389 0 07 000 0015 0 11 Reset EEPROM 1 8V voltage circuit 24 02 stabilizing Figure 3 2 7 1 Decode circuit block diagram 2 Workin
67. de pen psp se p FB 104 104 104 _ 104 Q308 3 558550 E cile 18 5 7 E ho L 21181888 5 SARK 55 amp 20428 Alla 151565159 18 alaja lt lt lt lt lt lt lt lt lt lt lt lt lt gt gt C281 V18 104 AGND VGND C231 C232 C234 235 104 104 104 _ 104 1208 FBSMT DV33 Pe dis 219 104 47uF 10V R239 560R gt 220uF 10V 220uF 10V D218 D217 5 1V 0 5W p 1V 0 5W 101 7 000000000 7 FBSMT 7 R264 IR 6 5 GND XS201 EMT d X80 9 3 ___ 1222 FBSMT VSCK HH 1293 VDA FSO D205 C256 C25 C258 259 D206 5 1V 0 5W 1V 0 5W p 1V 0 5W 101 47 47 47 5 DV33 1 16MBit FLASH TSOP 5033 033 gt ___ 6 5 d SDRAM 64M A21 R231 OR DNS 21 C2151 C2150 L218 104 DV33 5033 104 Sie Simon ga zn Sem i s Lais 104 104 104 104 104 104 104 R221 URST L220 SVV FBSMT R222 4 TC208 33R C268 4TuF 10V TC215 153 10uF 16V 1N4148 C272 598055 7N 1815 1219 GND VI8 FBSMT 18 R215 10K 275 X201 C276 27 27MHz 27 R317 680K R318 OR D209
68. dedicated current mode PWM controller with a high voltage Power MOSFET on the same silicon chip Typical applications cover off line power supplies for battery charger adapters standby power supplies for TV or monitors auxiliary supplies for motor control etc The internal control circuit offers the following benefits Large input voltage range on the VDD pin accommodates changes in auxiliary supply voltage This feature is well adapted to battery charger adapter configurations Automatic burst mode in low load condition Overvoltage protection in hiccup mode 2 FEATURES FIXED 60 KHZ SWITCHING FREQUENCY 9V TO 38V WIDE RANGE VDD VOLTAGE CURRENT MODE CONTROL AUXILIARY UNDERVOLTAGE LOCKOUT WITH HYSTERESIS HIGH VOLTAGE START UP CURRENT SOURCE OVERTEMPERATURE OVERCURRENT AND OVERVOLTAGE PROTECTION WITH AUTORESTART 3 PIN DESCRIPTION IBN SOURCE Power MOSFET source and circuit ground reference 71 Power MOSFET drain Power MOSFET drain Power MOSFET drain 3 5 10 function introduction to HS817 U502 HS817 is a photoelectric coupler shown as the figure 3 5 10 1 The right side is a light emitting diode which sends out light of different intensity according to the strength of voltage inputted from the right side generates photocurrent of different intensity on the left side according to light of different intensity and outputs from position D The higher of the voltage inputted from the right
69. e 7 2 2 2 Troubleshooting process for Not read disc Change loader frame 108 7 3 1 board 1 Surface layer of KEY SCAN Board 109 2 Bottom layer of KEY SCAN Board 110 3 Surface layer of MIC Board 6DV723 0 DVD 2006 6 14 601 608 111 4 Bottom layer of MIC Board 112 From MPEG Board 409 33 1 4 4 ete LED402 LED MODULE ZDC6 2004YRGB A 07401 3 3V 0 5W option 100uF 16V U402 0038 NYOS AJM 2 2 C616 JK601 R622 10ohm 1 6W 9V TC617 R631 R633 R65 474 6 2K 15K C602 HR 2 1 T 10616 474 6 104 R627 56 CI R621 10ohm 1 6W 49V 49VA ge ES Lug R611 LE Be 615 C601 8 474 6 104 02 R628 47uF 16V 26 He 56K C617 AGND 101 NC R608 R610 45V 45V IK 10K T T R615 VDO IN4148 6 R619 1 06028 w 4558 10 e IN4148 BEAD E peog OIN DV721S1 2 service manual Decode board power board and AV output board circuit of DV721SI 2 is the same with that of and refer to DV717Sl 2 relevant circuit explanation for details The difference of DV721SI 2 and DV717SI 2 is that main panel screen adopts LED screen and control IC is PT6554 Now we will introduce the differences between 0 721 1 2 and DV717SI 2
70. ecode Decodes MPEG1 video and MPEG2 main level main profile video 720 480 and 720x576 Decodes MPEG 4 Advanced Simple Profile Support DivX 3 11 4 x 5 x Home Theater Profile Support Nero Digital Smooth digest view function with I P and picture decoding Baseline extended sequential and progressive JPEG image decoding Support CD G titles 10 Video OSD SPU HLI Processor Arbitrary ratio vertical horizontal scaling of video from 0 25X to 256X 65535 256 16 4 2 color bitmap format OSD 256 16 color RLC format OSD Automatic scrolling of OSD image 11 Audio Effect Processing Dolby Digital decoding DTS DTS ES decoding 1 layer 1 layer 2 audio decoding 2 layer1 layer2 2 channel audio High Definition Compatible Digital HDCD Windows Media Audio WMA Dolby ProLogic II Concurrent multi channel and downmix out IEC 60958 61937 output bit stream mute mode Custom IEC latency up to 2 frames Pink noise and white noise generator Karaoke functions Microphone echo Microphone tone control Vocal mute vocal assistant Key shift up to 8 keys Chorus Flanger Harmony Reverb Channel equalizer 3D surround processing include virtual surround and speaker separation 50 12 Four 108MHz 12bit DACs Support NTSC PAL BDGHINM PAL 60 Support 525p 625p progressive TV format Automatically turn off unconnected channels Support PC monitor VGA Support Macro vision 7 1 11 Macro vision 525P and
71. eneration DV decode chip with built in Dolby Digital decoder which will bring you to a brand new AV ententainment world The 2 laser super error correction mechanism supports CD R Brand new AV Effects with DivX MPEG4 discs to produce wonderful pictures 108MHz 12bit video DAC with more vivid and brilliant pictures Progressive scan video outputs to eliminate the flickers hardly ouvercome by interlacing scan and therefore your eyesight will be well protected At the same time the pictures deflnltion Is sharply enhanced and the pictures will be finer smoother and stabler Brightness chroma and contrast adjustment functions to render your eyes more comfortable Z Digital echo Karaoke to enable your singing easier Composite Video S Video and Component Video outputs Bullt In Dolby Digital decoder separate 5 1Ch Outputs Dolby output for 2channel DOWNMIX DVD Audio decoding output to reproduce original and realistic sound effects High Quality Digital Audio Optical and coaxial outputs for Digital audio ZDTS Dolby Digital PCM Digital audio outputs to satisfy the Fans Ss acoustic requirements Many Convenient Features Screen saver protects your TV set carefully The novel playback window GUI provides you a new way to appreciate Mp3 music Multi angle playback function makes it possible for you to view a scene from different camera angles 5 possible to select the desired beginning development and endi
72. es of SCART out connector Optional setting S Video Component SCART Default Component When using RGB outputs from the SCART interface please select RGB Otherwise please select Com ponent and when using S Video output please select S Video 4 TV format To set the aspectratio of this player s output image Optional setting 4 3 Pan scan 16 9 letterb 16 9 TV Default 16 9 letterb 5 Sharpness Used to set the sharpness of video outputs Optional setting High Medium Low Default Medium 6 Gamma emendation This item is used to setup the Gamma value of video output Optional setting High Medium Low Off Default Off 7 Brightness Used to set the brightness of video outputs 8 Contrast Used to set the contrast of video outputs 9 Hue Used to setthe hue of video outputs 10 Saturation Used to setthe saturation of video outputs z Brightness contrast hue and saturation adjusting means A Press UP DOWN arrow the video setupmenu to select the desired item you want to adjust Press OK RIGHT button to enter the item s adju stment B Press UP DOWN arrow to adjust the setting value 2 4 4 Sound Mixer gt Configuration Digital output Stereo mix Tuning Surr Mix Low band Channels Delays PRO Logic 1 Mixer Configuration St Stereo Stereo mix L R Sx Surr Mix off Low band FSW Channels Delays PRO Logic Il A Configuration T
73. fying Figure 8 1 2 1 MIC circuitblock diagram 116 2 Working principle MIC part working principle after microphone is inserted into MIC left DET signals change from low level to high level to make mute circuit of decode art off No matter disc reading is available audio signals may be outputted If this signals has trouble microphone will have no sound when playback is stopped After being filtered signals inputted by microphone output to U601 and signals after discharging output from 0601 through the second amplifying outputted by 0602 to decode board directly for Karaoke signals processing and output together with audio signals to realize the function of Karaoke 117 8 2 1 Servicing instances Example 1 Symptom power not on Description 5V 9V 9V 3 3V have no output Analysis and troubleshooting check power board and find that each channel voltage has no output Check and find that 220V voltage input is normal and bridge rectification circuit has no voltage output Use multimeter to test fuse pipe and find that is has open circuit change fuse pipe and trouble is no removed Test anode of Tc501 and there is still no voltage output and fuse pipe has been burnt down Check the 4 diodes of bridge rectification circuitand they are allnormal Tc501 has no liquid leakage and stricken through test pin 1 and pin 8 of 0501 switch IC and they are short circuited this IC has been stricken through after changing this IC
74. g principle this decode circuit is mainly composed of Mt1389 SDRAM and FLASH Important conditions for the working of decode circuithave 1 Reset refer to reset circuit working principles for details 24 2 Clock this system adopts 27M external clock input to produce the required clock signals through inside doubling circuit 3 Power decode chip adopts 2 groups of power supply 3 3V and 1 8V in which 1 8V is mainly provided for internal logic control circuit which is called core voltage by us After power on reset circuit performs reset to Mt1389 built in CPU 8032 and FLASH decode chip outputs reset signals at the same time and performs reset to other circuits After system reset read signals are firstly sent to FLASH to read out information saved inside FLASH machine displays powerOon picture servo system begins to work and check whether door os closed to proper position and whether detect switch is shut if not action of closing door is performed After detect switch is shut machine begins to perform the preparations of discreading and panel display Playback process laser head picks up disc information from discs through being processed by servo system and sends to decode circuit for decoding and signals after being decoded are saved in SDRAM When machine required to replay signals decode circuit calls out information inside SDRAM for output Save user information information set by users is saved inside EEPROM and
75. gh he auto control function of feedback loop power board can output comparatively stable voltage 3 2 13 Headphone circuit 1 Headphone circuit block diagram is shown inthe figure 3 2 13 1 H R R U603 TDA1308 JK601 5603 H L headphone amplifying __ socket Figure 3 2 13 1 Headphone circuit block diagram 2 Working principle H L H R signals of audio output end are transmitted to the headphone amplifying circuit of MIC board through 5603 and headphone amplifying circuit is mainly composed of U603 TDA1308 Function of main pins of TDA1308 Pin 1 7 is output pin Pin 6 2 is input pin Audio signals after being amplified output to headphone socket JK601 directly 3 2 14 MIC circuit 1 MIC circuit block diagram is shown inthe figure 3 2 14 1 U601 U601 amplifying amplifying Figure 3 2 14 1 MICcircuit block diagram 30 2 Working principle MIC part working principle when microphone is inserted into MIC left DET signals change from low level to high level to make mute circuit of decode part off No matter disc reading is available audio signals may be outputted If this signal has trouble microphone will have no sound when playback stops After being filtering signals inputted by microphone output to pin 5 of U601 and signals after discharge output from pin 7 of U601 after second amplifying outputted by pin one of U601 to decode board directly for Karaoke signal processing and outp
76. illator is normal normal Whether A1 A2 A16 A17 N of FLASH have Takedown FLASH and data output record again Y Change MT1389 Figure 3 3 2 2 Troubleshooting flow chart for Not startup After changing U202 whether it is normal 39 Section Four Waveform diagram This section collects signal waveform diagram of audio video and each unit circuit with the purpose to help servicing personnel to judge where trouble lies in accurately and quickly to improve servicing skills For the difference of oscillograph s type model and tuner a certain difference may exist so the servicing personnel are expected to pay more attention to check in daily operation 1 Waveform diagramfor pulse DC of power board D513 anode Tek Stop Pos 0 0005 SAVE REC 1 Saving Images Select Folder Save CH1 5 004 10 005 CH1 7 46V Current Folder is 2 RFO signal waveform diagram of pin 17 of XS301 Tek JL Stop Pos 0 0005 SAVE REC Action Save Image File Format IM About 1 Saving Images Select Folder Save 02 CH1 100mV M 100ns CH1 Z 13 3mVv Current Folder is 40 3 Asignal waveform diagram of pin 15 of XS301 B C D E Tek RS Stop M Pos 0 0005 SAVE REC Action Save Image File Format BMP About Saving Images 1 Select Folder Save C
77. ing when load resistence is small and current is large filtering is obvious To constitute capacitor into IT type filter better filtering effect may be achieved 29 5 Feedback loop the time length of and off the same cycle inside switch module 22 is decided by feedback loop Feedback loop samples 3 3V output voltage when output level is too high voltage after being sampled is on high side through feedback loop space occupation ratio of pin 3 signal of VEPR22 is changed time reduced and output voltage begins to decrease When output voltage is too low voltage after being sampled is on low side through feedback loop space occupation ratio of VEPR22 increases output voltage increases Through the function of feedback loop power board outputs stable voltage LM431 used in this power is a 2 5V comparator Compare sampling voltage with this 2 5V voltage when sampling voltage is more than 2 5V output voltage is on high side LM431 is on light emission diode in photoelectric coupler begins to emit light to make the other end of photoelectric coupler begin to be on light emission of light emission diodeis stronger the degree of on is larger the time of of switch module VEPR22 decreases output voltage begins to reduce When sampling voltage is lower than 2 5V output voltage is on low side LM431 cuts off on time of VEPR22 increases and output voltage increases thus throu
78. interface Housed in a 32 pin SO Package PT6961 pin assignments and application circuit are optimized for easy PCB Lay out and cost saving advantages 2 FEATURES CMOS Technology Low Power Consumption 75 Multiple Display Modes 12 segment 6 Grid to 11 segment 7 Key Scanning 10 x 3 Matrix 8 Step Dimming Circuitry Serial Interface for Clock Data Input Data Output Strobe Pins Available in 32 pin SOP Package 3 PIN DESCRIPTION 7 HN 1 1 iy wwe a EE Ee E e NE NE BD NN NC 561 51 9 e f 76 3 5 16 function introduction to LM1117 1 Description The LM1117 series of adjustable and fixed voltage regulators are designed to provide 1A output current and to operate down to 1V input to output differential The dropout voltage of the device is guaranteed maximum 1 3V at maximum output current decreasing at lower load currents On chip trimming adjusts the reference voltage to within 196 accuray Current limit is also trimmed minimizing the stress under overload conditions on both the regulator and power source circuitry The 1117 devices pin compatible with other three terminal SCSI regulators and are offered in the low profile surface mount SOT 223 package and in the TO 2
79. interface port 3 data out TDO V ADIN7 In Out Non pull 2 Version AD input port 7 3 GPIO 63 3 5 2 function introduction to 24 02 1 Description The 24 02 provides 2048 bits of serial electrically erasable and programmable read only memory EEPROM organized as 256 words of 8 bits each The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential The 24 02 is available in space saving 8 lead PDIP 8 lead MAP 8 lead TSSOP and 8 dBGA2 packages and is accessed 2 wire serial interface In addition the entire family is available in 2 7V 2 7V to 5 5V and 1 8V 1 8V to 5 5V versions 2 Features Low voltage and Standard voltage Operation 2 7 VCC 2 7V to 5 5V 1 8 VCC 1 8V to 5 5V Internally Organized 256 x 8 2k 2 wire Serial Interface Schmitt Trigger Filtered Inputs for Noise Suppression Bi directional Data Transfer Protocol 100 kHz 1 8V and 400 kHz 2 5V 2 7V 5V Compatibility Write Protect Pin for Hardware Data Protection 8 byte Page 1K 2K Write Modes Partial Page Writes are Allowed Self timed Write Cycle 5 ms max High reliability Endurance 1 Million Write Cycles Data Retention 100 Years Automotive Grade Extended Temperature and Lead Free Devices Available 8 lead PDIP 8 lead JEDEC SOIC 8 lead MAP 5 lead SOT23
80. ion to facilitate to output level from IOA pin to make disc switch circuit and laser head PD IC make the relevant control action At the same time Mt1389 adjusts laser output power through laser power control circuit After loader reading disc information A B C D E F signals are formed through photo electric conversion and sent out to Mt1389 DVD only has A C D signals and then inputted from pin 2 11 18 19 of MT1389 After being amplified and processed by the pre amplifier inside MT1389 now signals are separated to two part s for processing inside Mt1389 One part through addition inside Mt1389 and amplifying and subtraction circuit produces servo error signal after being processed by digital servo 18 Signal circuit corresponding servo control signals form to output FOO TRO DMO digital servo Control signals from pin 42 pin 41 pin 37 pin 38 of Mt1389 respectively and FOSO TRSO DMSO FMSO through integration circuit composed by resistor capacitor and send to servo driver circuit for amplification to bring along focus winding trace winding main axis electric machine and feed electric machine after drive amplification Among these focus and trace servo are used to correct objective position accurately feed servo is used to bring along laser head to make radial large scale move which belongs to the preliminary adjustment to laser head position and main axis servo is used to control main axis electric machine to
81. iple 3 2 1 Laser head circuit 1 Laser head flat cable functionintroduction is shownin the following table Signal flow direction DVD disc No disc Function description Input load Focus error signal is added to tw o sides of up focus coil Input loader Input load Trace error signal is added to tw o sides of pick up trace coil Through the handling inside loader make sure MD11 is 180mV w hen reading CD Through the handling inside loader make sure MD11 is 180mV w hen reading DVD CDlaser pow er control signal NN EN ES E Input loader s 1389 EN Input MT 1389 7 1389 E Input MT 1389 ox Input MT 1389 1389 EX Input MT 1389 Ground Input loader Input loader EN Input MT 1389 Blanking haning in air VR CD Input loader VRDVD Input loader 9 LD CD Input loader 16 ELS ELS CDand DVD laser power monitoring signal and DVD laser pow er monitoring CDand DVD laser power monitoring signal High frequency overlapping signal produces DES Inputisader laser w ith diff erent w ave length inside loader LD DVD Input loader DVD laser pow control signal eo oor o Note 1 When reading DVD there are only A B C D signals 2 When reading CD there are A B C D E F signals 3 RFO A B C D 4 Focus
82. is segment control SEG1 SEGO is bit control Function of 0401 PT6312A is to process data signals sent from decode board to drive display screen to display the relevant state and scan panel buttons matrix atthe same time after processing button information send to CPU in the means of digital signal to control the player to make the relevant action Pin 2 of remote control IR receiver is 5V power suppl pin pin 1 is grounded pin 3 is output pin receiver processes button information of remote controller and then outputs from pin 3 to decode board directly 7 1 2 MIC circuit 1 MIC circuit block diagram is shown inthe figure 7 1 2 1 Voltage stabilizing circuit 5V R gt U601 0602 L amplifying amplifying 9V U602 DET comparison Figure 7 1 2 1 MIC circuit blockdiagram 104 2 Working principle after microphone is inserted into MIC left DET signals change from low level to high level to make mute circuit of decode part off no matter whether disc reading is available audio signals may output If this signal has trouble microphone will have no sound when playback stops After being filtered signals inputted by microphone outputs to pin 5 of U601 and then outputs from pin 7 of U601 after discharge Through the second amplifying outputted by pin 1 of U602 to send to decode board directly for Karaoke signal processing and output with audio signals torealize Karaoke function 7
83. le is removed Example 15 Symptom not read DVD disc Description all discs can be read except for DVD disc Analysis and troubleshooting check laser head focus feed main axis and trace and they are all normal but no light emission check emitter electrode voltage of Q301 and it is 3 3V which is normal and collector electrode voltage is 2 2V which normal check inductor L312 between collector electrode and pin 2 of Xs301 and find thatinductor has open circuit after changing inductor trouble is removed Example 16 Symptom no MIC Description insert microphone and speak there is sound output and disc sound output is normal Analysis and troubleshooting power on and insert microphone use oscillograph to test OK signal of pin2 of XS302 and find that this pin has no OK signal when checking pin 7 output of MIC board U601 OK signal output is abnormal when inserting and unplugging microphone DET detect signal voltage is always 3 3V after changing MIC holder trouble is removed Example 17 Symptom noise appear when power off Description at the moment of power off audio output had noise and TV speakerhas a bump sound Analysis and troubleshooting when this kind of trouble appears trouble lies in power off noise removing circuit firstly test MUTE 1 voltage of C electrode of Q214 at the moment of power off and find that this point voltage changes from 7 8V to 0 5V gradually use multimeter to test circuit elements around
84. log audio signals output directly from decode chip through audio amplifying and filtering circuit output audio signals directly to AV output board Audio L R signals are divided into two channel in which one channel outputs to audio output terminal and the other channel outputs to headphone amplifying circuit on MIC board 3 External Karaoke signalinput and output After MIC signals are being amplified by 4558 through 55340 A D conversion circuit they switch into digital audio signals to input to decode chip for echo and volume processing circuit and output with audio signals L R to reach the purpose of Karaoke 2 27 3 2 11 Mute circuit 1 Mute circuit diagram is shown in the figure 3 2 11 1 R2107 VMUTE 10K 0212 0203 28c1815 Ys 1 4148 Figure 3 2 11 1 circuit 2 circuit working principle When the player is working normally shown in the figure 3 2 11 1 when chip is outputting analog audio signals it outputs s low level signal at the same time to VMUTE to make Q211 on voltage of Q211B electrode is about 2 7V voltage of Q211 collector electrode is about 3 3V so Q212 is also on voltage of B electrode is about 0 7V voltage of Q213E electrode is closeto zero Q213 cuts off MUTE 1 is negative voltage which is added to base electrode of mute pipe of audio output end to make mute pipe cut off and audio signals output after being amplified by 4558 When in mute MT1389 has no audio
85. m judges that there is no discin Note Q303 Q304 are MOS pipe 3 Key point voltage unit V is shownin the following table Q305 Q303 Base electrode B Collector C Grid electrode Drain electrode D Source electrode Q304 21 3 2 5 Open close door drive circuit 1 Open close door drive circuit is shown the following figure 3 2 5 1 2 puso R314 R201 10K 10K 5 R204 97K R203 27K __ SIBY SP SR R202 15K LOAD AM5888S LOAD MT1389 rk _ ____51 Figure 3 2 5 1 Open close door drive circuit diagram 2 Working principle when machine is reading discs normally pin 6 7 9 of 58885 all 0 After pressing OPEN button pin 6 inputs high level pin 10 LOAD outputs high level electric machine rotates in positive direction and performs action of opening door When closing door pin 7 inputs high level pin 9 LOAD outputs high level and forms loop through electric machine which reverses to carry out action of closing door After closing ti proper position all pins are low level Servo drive principle is the same with the drive of D5954 solution so we will notrepeat here 3 Key point voltage unit V is shownin the following table Q306 Q307 State Base electrode B Collector C Enittor E Base electrode B Collector C Enittor E
86. make it read signals in means of constantlinear velocity and bring along disc to rotate After processing of amplification by VGA voltage control amplifier and equalization frequency compensation inside 1389 another part of signals are changed into digital signals through internal A D converter When loader is reading CD VCD signals these signals are conducted EFM demodulation inside MT1389 and then outputted to latter stage for AV decoding after finishing CIRC Cross Interleaved Reed Solomon Code error correction inside When loader is reading DVD signals these signals are conducted ESM demodulation inside MT1389 and then sent to latter stage for decoding after finishing RSPC error correction inside Normal DVD player has a open close circuit to control the in and out of doorto reach the purpose of coneying discs PDVD adopts manual open means and whether itis close to proper position can be checked by detect switch 3 Explanation to servo terms 1 FOO when rotating disc may probably move upwards or downwards slightly to make the focus of laser emitted by laser head cannot justly fall on data pit of disc so laser head is required to move upwards or downwards to make focus aim at data pit When laser head is moving upwards or downwards it means that pick up is making focus acts 2 TRO data information is saved in disc in form of tracks When disc is rotating trace deviation will produce and now laser head is required to be
87. ne 215 MC_DATA PD SMT 1 Microcontroller external interrupt 2 GPIO Output SPDIF 4 16 S PDIF output SR ON OFF omues pem O an a sn omoes ADACVSS1 Ground pin for AUDIO DAC circuitry r 1 AUDIO DAC Sub woofer channel output ARF Output 2 While internal AUDIO DAC not used GPIO 1 AUDIO DAC Right Surround channel output 2 While internal AUDIO DAC not used ARS GPIO Output a SDATA3 b GPIO 1 AUDIO DAC Right channel output AR GPIO Output 2 While internal AUDIO DAC not used a SDATA1 58 LLL Te 1 AUDIO DAC Left Surround channel output 2 While internal AUDIO DAC not used 226 AL GPIO Output a SDATA2 b GPIO 1 AUDIO DAC Left Surround channel output 2 While internal AUDIO DAC not used 227 ALS GPIO Output a SDATAO b GPIO 1 AUDIO DAC Center channel output 228 ALF GPIO Output 2 While internal AUDIO DAC not used GPIO ADACVDD1 Power 3 3V power AUDIO DAC circuitry ADACVDD2 3 3V power AUDIO DAC circuitry Video Interface 18 E DACVDDC Power 3 3V power for VIDEO DAC circuitry 1 Video data output bit O 2 Compensation capacitor 12 DACVSSC Ground pin for VIDEO DAC circuitry Output 1 Video data output bit 1 191 YUV1 Y SR 2 Analog Y output DACVDDB Power 3 3V power for VIDEO DAC circuitry Output 1 Video data output bit 2 189 YUV2 C
88. ng ofa story Z Direct entry into desired scenes title chapter track search Zooming function to zoom up any playing picture Capable of playing PAL NTSC discs z Multiple aspect ratios to fit TV sets of various screen ratios Parental lock function to prevent children from watching unsuitable discs Multiple dubbing languages and subtitle languages bring you the best entertainment status all the time Super Compatibility with super VCD VCD CD R MP3 HDCD KODAK PICTURE CD etc NOTE DivX version is still upgrading continuously and the latest version of this unit is DivX 5 1 Some discs labelled with MPEG4 on the marketactually are others with which uncompatible Please take care when buying discs 2 2 Control Button Locations and Explanations 2 2 1 Front Panel Illustration 9 7 99 GEM 00 15338 0 77 eo v 1 MIC jack 6 PLAY button 2 7 PAUSE button 3 POWER switch STOP button 4 Disc tray 9 IR SENSOR 5 OPEN CLOSE button Display windows 2 2 2 Rear Panel Illustration o 0 CD Mixed Audio Outjack 5 Video Component Y Pb Pr Out jacks 2 5 1CH Audio Outjacks 6 Digital Audio Coaxial Out jack 3 S Video 7 Digital Audio Optical Out jack 4 Video Out jack SCART Outjack 2 2 3 VFD Display Window Illustration 9 o SVCD MP3 000
89. o 3 3V at the moment of power on 3 2 9 Video circuit 1 Video signals flow chart diagram is shown in the figure 3 2 9 1 VIDEO SY 0209 S video JK703 VIDEO G Y VIDEO B U VIDEO R V SCART Figure 3 2 9 1 Video signalflow chart 2 Working principle MT1389 has built in video D A conversion circuit video output has R B G Y Pb Pr Y Cb Cr CVBS Y C output mode in which R B G Y Pb Pr Y Cb Cr Y C cannot output at same time and need software to switch CVBS is a separate output mode 4 channel video signals outputted by MT1389 after video filtering and clamping output to video terminal Shown in the figure 3 2 9 2 capacitor C287 C288 and inductor L227 compose a low pass filter to filler high frequency interference signals except for useful signals dual diode D211 composes a clamping circuit It is known from features of diode that the most range of composite video signal CVBS cannot be over 5 7 and cannot lower than 0 7 in minimum thus high voltage signals from TV set can be prevented from burning down the player 226 101 101 Figure 3 2 9 2 Video outputcircuit 3 2 10 Audio circuit 1 Audio circuit block diagram is shown in the figure 3 2 10 1 ASPDIF MT1389 SLRCK AMDATA 55340 Figure 3 2 10 1 Audiocircuit block diagram 2 Working principle Mt1389 has built in audio DAC conversion circuit ana
90. o set this player s DOWNMIX mode to change multi channel audio into two channel audio Optional setting Stereo 5 1 Default Stereo B Stereo mix To set the output means of the left or right audio when playing a Dolby disc with separate two channel audio Optional setting L R L R Default L R C Surr Mix To set output means of the surround left and right audio when playing a stereo disc Optional setting Off sum Virt Surr Default Off D Low band select the channel that you desire to output low frequency signal Optional setting Front F Center C Surround Sr Subwoofer SW Default Front F Subwoofer SW E Channels To set volume ofeach individual channel a Press UP DOWN navigation keys to select CHANNEL TRIM then press the RIGHT navigation key to select ENTER SETUP PAGE as shown inthe TV screen FRONT surround Volume L r Center SW p 20 b Press LEFT RIGHT navigation keys to select the desired channel to adjust c Press UP DOWN navigation keys to raise or lower volume of the channel D Press OK or LEFT to return to the Mix setup page F Delays To set delay time of the Center Surround Subwoofer Speaker a Press UP DOWN navigation keys to select Delays in Channels item then press OK or RIGHT navigation key select ENTER SETUP PAGE as shown in the TV screen Subwoofer
91. on Analysis and troubleshooting firstly check whether pin 1 of light touch switch K402 of main panel has activating signal voltage is 3 5V and it is normal press PAUSE button use voltage level of multimeter to test voltage of another pin not adjacent and it is 3 5V and the normal voltage is 0 7V so we doubt that it is caused by the trouble of 02404 diode to make pin 11 of 6312 cannot be on after changing it trouble is removed Example 3 Symptom power not on Description 5V 9V 9V 3 3V have no output Analysis and troubleshooting check power board and find that each voltage has no output check and fin that 220V voltage input is normal bridge rectification circuit has no voltage output use multimeter to test fuse tube and it has open circuit change fuse tube and trouble is not removed Test anode of TC501 and there is still no voltage output fuse tube has been burnt down again check 4 diode of bridge rectification circuit and they are all normal TC501 has no abnormalities of leakage and stricken through test pin 1 8 of U501 switch IC and has short circuit this IC has been stricken through after changing this IC trouble is removed 34 Example 4 Symptom not read disc Description not read any disc Analysis and troubleshooting check laser head light emission feed main axis and trace and they are all normal but there is no focus action use multimeter to test pin 13 14 of U301 5888 and voltage is
92. power When laser power is too strong voltage of MDII pin increases to make voltage of pin 23 of Mt1389 increase to make voltage of pin 19 of Xs301 decrease to reach the purpose of reducing laser power to form an auto power control circuit When reading DVD disc pin 21 is detect signal input pin pin 22 is drive control output pin and working principle is the same with that when playing VCD disc 3 Key point voltage unit V is shown the following table Read DVD disc Read VCD disc Read DVD disc Read VCD disc 20 3 2 4 CD DVD switch circuit 1 CD DVD switch circuitis shown in the figure 3 2 4 1 R308 R309 p 5301 MT1389 2SK3018 S 2SK3018 S Figure 3 2 4 1 CD DVD switch circuit diagram 2 Working principle after loading disc into the machine of Mt1389 is defaulted high level to make Q305 saturated on and form loop with CD laser power control circuit on loader Atthe same time IOA directly reaches loader PD IC for switch and disc begins to rotate When servo processing system identifies that disc in machine is not CD IQA pin outputs low level to make Q305 cut off Q303 is on and forms loop with DVD laser power control circuit on loader to perform the action of reading DVD disc After disc tray opens IOA still keeps the state before opening disc If the machine cannot identify which disc is in this machine IQA pin will switch continuously until disc has been read or syste
93. r place DVD player in positions with high temperature and humidity 2 Avoid placing near high magnetic fields such as loudspeaker or magnet 3 Positions for placement should be stable and secure 1 2 Maintenance method 1 2 1 Visualized method Directly view whether abnormalities of collision lack of element joint welding shedding welding rosin joint copper foil turning up lead wire disconnection and elements burning up among pins of elements appear Check power supply ofthe machine and then use hands to touch the casing of part of elements and check whetherthey are hot to judge the trouble spot You should pay more attention when using this method to check in high voltage parts 1 2 2 Electric resistance method Set the multimeter in resistance position and test whether the numerical value of resistance of each point in the circuit has difference from the normal value to judge the trouble spot But in the circuit the tested numerical value of resistance is not accurate and the tested numerical value of integrated IC s pins can only be used for reference sothe elements should be broken down for test 1 2 3 Voltage method Voltage method is relatively convenient quick and accurate Set the multimeter in voltage position and test power supply voltage of the player and voltage of a certain point to judge the trouble spot according to the tested voltage variation 1 2 4 Current method Set the multimeter in current position and test c
94. signal output video signal output signal output ETURN GREEN 10 VO msearor 1 signal 10 pot VO port 3 SCART terminal function selection is shown as the following table PDATO PDAT1 PDAT2 Pin 8 of SCART teminal Note PDATO and PDAT2 are used to control input voltage of pin 8 of SCART terminal PDAT1 is used to control voltage change of pin 16 of SCART terminal and the voltage on pin 16 controls SCART terminal to select RGB mode or CVBS mode 3 2 16 Panel control circuit 1 Panel control circuit block diagram is shownin the figure 3 2 16 1 Remote VFDST VFDCK VFDAT Decode U401 V6312A Light emission diode Figure 3 2 16 1 Panel control circuitblock diagram Buttons 32 2 Working principle panel components divided into main panel and subordinate panel Main panel is mainly composed of VFD display screen drive chip V6312A remote controller IR receiver and indicator light subsidiary panelis composed of power button and power indicator light VFD screen is a vacuum fluorescence display screen and working principle is the same with that of CRT which depends on striking fluorescence powder GRID1 GRID8 is segment control equal to grid electrode speed up electronic emission responsible for the display selection with the netlike range in screen SEG1 SEGS is bit control connected on single character with fluorescence powder onit and it will emit
95. signals that output to operational amplifier so audio output end of the player should have no audio output electronic elements in circuit and IC will produce some noise to transmit to audio output end of the player in order to filter these noise decode chip outputs a high level signal to VMUTE to make 0211 cut off so 0212 cuts off 5 power transmits through E C electrode of Q213 to base electrode of switch pipe Q205 Q210 and circuitis in mute When the machine is not playing discs decode chip outputs a high level signal to VMUTE to make circuit enter mute 3 Power off quieting working principle Shown in the figure 3 2 11 1 when the player is working normally 0204 is on 5V charges capacitor TC235 through D204 now voltage of emitter electrode of Q214 is lower than voltage of base electrode and Q214 cuts off When power off 5V disappears 0214 base electrode changes to low level and its emitter base changes into high level because of discharge of TC235 now Q214 is on collector electrode of Q214 AMUTE outputs high level to add to the base electrode of switch pipe Q205 Q210 switch is saturated the noise produced in the course of power on and off is bypassed to ground and power off quieting function is realised 28 4 Key point voltage unit V is shownin the following table 3 2 12 Power circuit 1 Power circuit block diagram is shown inthe figure 3 2 12 1 9V Rectification 9V Rectification Rectifi
96. st effective DVD system on chip SOC which incorporates advanced features like MPEGd video decoder high quality TV encoder and state of art de interlace processing Based on MediaTek s world leading DVD player SOC architecture the MT1389E is the 3rd generation of the DVD player SOC It integrates the MediaTek 29 generation front end analog RF amplifier and the Servo MPEG AV decoder To enrich the feature of DVD player the MT1389 equips a simplified MPEG 4 advanced simple profile ASP video decoder to fully support the DivX1 Home Theater profile It makes the MT1389 based DVD player be capable of playback MPEG 4 content which become more and more popular The progressive scan of the MT1389HD utilized advanced motion adaptive de interlace algorithm to achieve the best movie video playback It also supports a 3 2 pull down algorithm to give the best film effect The 108MHz 12 bit video DAC provides users a whole new viewing experience 2 General Feature lists 1 Integration DVD player single chip High performance analog RF amplifier Servo controller and data channel processing MPEG 1 MPEG 2 JPEG video Dolby AC 3 DTS Decoder Unified memory architecture Versatile video scaling amp quality enhancement OSD amp Sub picture Built in clock generator Built in high quality TV encoder Built in progressive video processor Audio effect post processor Built in 5 1 ch Audio DAC 48 2 High Performance Analog RF Amplifier Programmable fc Du
97. t check voltage of pin 4 8 9 9V of U601 andit is normal use oscillograph to test 5 of 0601 4558 and find that there is signal input and input signals are normal test pin 7 of U601 and there 15 no signal output check elements around and there is no abnormality so we doubt that 0601 is damaged after changing 0601 trouble is removed 36 Example 13 Symptom AV output has no colour Description when in AV output there is only black and white picture output without colour other video port output also has abnormality Analysis and troubleshooting test other port output and there is still no colour which means that trouble should lie in decode circuit check decode chip and each voltage is normal according to circuit working principle this trouble often appear due to the influence of clock frequency use electric iron to heat 27M crystal oscillograph and find that picture has flickering and colour appears sometimes after changing 27M crystal oscillograph trouble is removed Example 14 Symptom not read CD disc Description can play DVD disc and MP3 disc not read CD disc Analysis and troubleshooting check laser head focus feed main axis and trace and they are normal test Q302 emitter electrode voltage and it is on low side which should be 3 1V in normal conditions so we doubt that R302 resistor has been damaged use multimeter to test the resistance value and it is infinite after changing resistor troub
98. t 10 42 9 Waveform diagram of 8 0208 SDRAM Tek BUR Trig d Pos 0 0005 SAVE REC Action Save Image File Format i About 1 Saving Images Select 7 Folder 2 46 CH1 500 M 5 0015 CH1 13 3mV 23 06 17 06 123 536MHz 10 Video signal waveform diagram Tek Stop Pos 220 05 SAVE REC Action Save Image File Format T About 1 Saving Images Select Folder Save TEKOO04 BMP CH1 S mV 2 50ms All Current Folder is A 11 ACLK 12 2878MHZ waveform diagram for external clock signal Tek ITE Stop M Pos 0 0005 SAVE REC Action Save Image File Format About 2 Saving Images Select Folder Save CH2 1 00 M 50 05 CH2 47 28 4 Current Folder is 43 12 ABCK 3 07195MHZ waveform diagram for bit clock signal Tek PIA Stop M Pos 0 0005 SAVE REC _ Actio About Saving Images Select Folder Save CH2 1 00 M 500ns CH2 28 4mV Current Folder is 13 ALRCK 48KHZ waveform diagram for left right channel clock signal Tek Stop Pos 0 0006 SAVE REC Action Save Image File Format About Saving Images hue Select Folder Save 02 CH2 100v 25 045 C
99. t are normal Analysis and troubleshooting when reading disc audio and video output is normal use oscillograph to test pin 1 3 in AV board XS702 and there is waveform output use multimeter to test voltage of pin 3 5 of MIC board 0603 TDA1308 and itis 5V without abnormality test pin 8 voltage and it is also 5V power supply is normal use oscillograph to test pin 2 6 of U603 and there is waveform input test pin 1 7 and there is no output after changing U603 trouble is removed Example 8 Symptom no MIC Description when reading discs sound and picture are normal Analysis and troubleshooting power on use remote controller to turn on MIC insert microphone and speak use oscillograph to test pin 4 OK of MIC board 5601 and find thatthere is no signal output 35 Check voltage of pin 4 8 9V 9V of 0601 and it is normal use oscillograph to test pin 5 0601 4558 and there is signal input test pin 7 of 0601 and there is no signal output after changing U601 trouble is removed Example 9 Symptom no sound Description picture output is normal Analysis and troubleshooting test pin 1 7 of operational amplifier of sound output circuit and there is no signal output test power supply voltage of operational amplifier and it is 9V which is on low side after removing load test power board 9V voltage output and it is normal so we confirm that trouble lies in decode board part Only U209 of decode board has 9V po
100. to adjust the setup value C After adjustment finishes press OK button to return to microphone setup page Microphone On Kar help No ast Volume 4 Echo 4 4 Echo A In microphone setup page press UP DOWN cursor to select Echo item and then press OK button to enterthe adjustment menu B Press UP DOWN cursorto adjust the setup value C Afterthe adjustment finishes press OK button to return to microphone setup page Microphone Kar help No ast Volume Echo LED Control Gr equalizer Background std Screen saver 1 LED Control This is used set color of led on the front panel Optional setting On Off Default On 2 Gr equalizer This item is used to set wether the Dynamic Spectrum is allowed Optional setting On Off Z Default Off Dynamic Spectrum display isinvalid in Data Disc DVD AUDIO playback 3 Background This 15 used ti setup the sort of Power in Logo Optional setting Standard saved Default Standard NOTE The Screen Logo refers that use the image selected by pressing the CAPTURE button as the power on logo Whenin the operation of changing screen if the power on logo has not set in Screen Logo the unit will automatically set the power on logo as Screen Logo 4 Screen saver Open orclose the screen saver function Optional setting On Off Default On 2 4 8 Parental control Allowed Set password 1 Allowed
101. urrent of the player of a certain point to judge the trouble spot But when testing in current method the multimeter should be series connected in the circuit which makes this method too trivial and troublesome so it isless frequently used in reality 1 2 5 Cutting method Cutting method should be combined with electric resistance method and voltage method to use This method is mainly used in phenomena of short circuit and current leakage of the circuit When cutting the input terminal voltage of a certain level if voltage of the player rises again it means that the trouble lies in this level 1 2 6 Element substitution method When some elements cannot be judged good or bad substitution method may de adopted directly 1 2 7 Comparison method A same good PC board is usually used to test the correct voltage and waveform Compared these data with those tested through fault PC board the cause of troubles may be found Through the above maintenance method theoretical knowledge and maintenance experience all difficulties and troubles will be readily solved 1 3 Required device for maintenance Digital oscillograph 2100MHE TV set SMD rework station Multimeter Soldering iron Pointed month pincers Cutting nippers Forceps Electric screw driver Terminals connecting cord Headphone Microphone Chapter Two Functions and Operation Instructions 2 1 Features This player has employed the new g
102. ut together with audio signals to fulfil Karaoke function 3 2 15 AV output board circuit 1 AV output board is mainly composed of SCART output terminal ode switch circuit and filtering circuit AV output board outputs different signals to connect with the relevant external devices AV output board circuit block diagram is shown in the figure 3 2 15 1 Component video output terminal Optical terminal Figure 3 2 15 1 AV output board circuitblock diagram 2 Introduction to SCART terminal 1 Working principle SCART terminal integrates video and audio all together and it may transmit video and audio signals at the same time The operation is convenient 21 pins in all and lies in the central part on the rear side of the player 2 SCART terminal pin function is shown as the following table Signal Signal ioni Function description Name Function description direction direction BL A B OUT ES Audio right channel input CER Network communication data line 2 ABN Audio right channel output Audio right channel output channel output RETURN Prsignatground Pr signal ground ground 31 pe emnes e mensae Cr mee e e e om FUNCSW Function selection jack V OUT A Composite video signal input RETURN yt signal ground Y1 signal ground ground Conposite video
103. wer supply test resistance to ground of pin 8 and it is 86 which is infinite in normal conditions after changing 0209 trouble is removed Example 10 Symptom power not on Description switch on power picture of the player has no output panel has no OSD and panel buttons have no function Analysis and troubleshooting check power board and find that each path voltage has no output check and find that 220V voltage input is normal check bridge rectification circuit and voltage output is normal test anode of TC501 and voltage is 310V which is normal test pin 1 8 of U501 switch IC and they are short circuited this IC has been stricken through after clanging IC trouble is removed Example 11 Symptom not read disc Description not read any disc Analysis and troubleshooting check laser head light emission feed main axis and trace and they are all normal butthere is no focus action use multimeter to test pin 13 14 of U302 5888 and voltage is 2 28V 2 36V which is normal test pin 1 2 of Xs301 and voltage is also normal check nerve flat cable and contact is good so we judge that laser head focus winding has been burnt down after changing loader trouble is removed Example 12 Symptom no MIC Description microphone is invalid Analysis and troubleshooting power on use remote controller to turn on MIC insert microphone and speak use ocsillograph to test 5601 OK board and find that there is signal inpu
104. will be saved inside IC forever if users does not update orreset this information Audio video output circuit at present Mt1389 integrates video D A converter Mt1389 integrates audio D A converter inside and manufacturers may select according to their own demands therefore when in audio decode output part is analog output and part is digital output Please refer to circuit diagram and audio circuit for details 3 2 8 Reset circuit 1 Reset circuit is shown in the figure 3 2 8 1 d R221 URST 4TuF 10V C272 104 Figure 3 2 8 1 Reset circuit diagram 2 Working principle after power on voltage of Dv33 increases to 3 3V and main chip power supply is normal Now Tc208 cannot change voltage of Dv33 suddenly base electrode of Q201 has current in Q201 is saturated on URST is low level Dv33 charges Tc208 through emitter electrode of R219 and 25 0201 to make voltage of cathode of 12208 decreases gradually When this voltage is below 0 7 0201 cuts off URST changes into high level and the process for URST from low to hgih is called low level effective reset signals by us After power off voltage of Dv33 decreases Tc208 and Dv33 voltage decreases together D201 performs surge discharge and clamping to TC208 3 Key point voltage unit V Q201 B is low level when in normal conditions and changes from 3 3V to OV at the moment of power on 0201 C is high level in when in normal conditions and changes from OV t

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