LG GWA - 4083B Service Manual Download

Page: 1 / 76

DVD/CD Rewritable Drive

S E RVICE MANUAL

MODEL: GWA - 4 1 6 1 B

P/NO : 3828HS1049B

N o v e m b e r, 2004

Printed in Korea

MODEL : GWA-4161B

Summary of Contents for GWA - 4083B

Page 1: ...DVD CDRewritableDrive SERVICE MANUAL MODEL GWA 4161B P NO 3828HS1049B November 2004 Printed in Korea MODEL GWA 4161B ...

Page 2: ...DVD R RW DISCS AND DVDD ROM 24 32 1 Recording Layer 24 2 Disc Specification 25 3 Disc Materials 25 4 Writing Pulse Waveform of DVD R 28 5 Writing Pulse Waveform DVD RW 30 6 Organization of Inner Drive Area Outer Drive Area Lead in Zone and Lead out Zone 31 DVD CD DATA PROCESSING 33 36 1 Data Processing Flow 33 2 Copy Protection and Regional Code Management Block 34 3 About Prevention the DVD ROm f...

Page 3: ...t Once Incremental Recording and Restricted Overwrite 4 For DVD R Sequential Recording 5 For DVD R DL Double Layer Sequential Recording 6 For DVD RW Random Write This service manual provides a variety of service information It contains the mechanical structure of the DVD CD Rewritable Drive and the electronic circuits in schematic form This DVD CD Rewritable Drive was manufactured and assembled un...

Page 4: ...x CD DA DAE 24x Max DVD ROM R RW 16x 10x 8x Max R RW 10x 8x Max DVD Video CSS Compliant Disc Single Dual layer 8x Max 4 Sustained Transfer rate CD ROM 6 000 kB s 40x Max DVD ROM 22 16 Mbytes s 16x Max 5 Burst Transfer rate Ultra DMA Mode2 Multi word DMA Mode2 PIO Mode4 6 Multimedia MPC 3 compliant 5 Audio 1 16 bit digital data output through ATA interface 2 Software Volume Control 3 Equipped with ...

Page 5: ...ssion Video CD CD Audio Disc Mixed mode CD ROM disc data and audio CD Extra CD Text CD R Conforming to Orange Book Part2 read write CD RW Conforming to Orange Book Part3 read write 2 2 Writing method 1 For CD R RW Disc at Once DAO Session at Once SAO Track at Once TAO Packet Writing 2 For DVD R RW Disc at Once Incremental Recording Restricted Overwrite DVD RW only 3 For DVD RW Random Write 4 For D...

Page 6: ...15x CAV Approx 3 130 r min DVD ROM Single layer 6 7x 16x CAV Approx 9 420 r min Dual layer 3 3x 8x CAV Approx 5 180 r min DVD Video CSS 3 3x 8x CAV DVD R 3 95GB 4 2x 10x CAV Approx 5 950 r min 4 7GB 4 2x 10x CAV Approx 5 950 r min DVD RW 4 7GB 3 3x 8x CAV Approx 4 720 r min DVD R 4 7GB 4 2x 10x CAV Approx 5 950 r min DVD R DL 8 5GB 3 3x 8x CAV Approx 4 720r min DVD RW 4 7GB 3 3x 8x CAV Approx 4 72...

Page 7: ... s DVD R 2 4x 4x CLV 3 32 5 54 Mbytes s 8x ZCLV 5 44 11 08 Mbytes s 12x 16x CAV 8 91 16 62Mbytes s 8 91 22 16Mbytes s DVD R DL 2 4x CLV 5 54Mbytes s DVD RW 2 4x 4x CLV 3 32 5 54 Mbytes s 3 3 2 Burst transfer rate Ultra DMA Mode 2 33 3 Mbytes s Max Multiword DMA Mode 2 16 6 Mbytes s Max PIO Mode 4 16 6 Mbytes s Max 3 4 Access time Random Typical value DVD ROM SL 140 ms Typ Note 1 DVD ROM DL 175 ms ...

Page 8: ...A Typ 1 0 A Max 12V DC 0 5A Typ 1 0 A Max Write Active 5V DC 0 9A Typ 1 3 A Max 12V DC 0 5A Typ 1 2 A Max Read Active 5V DC 0 6A Typ 1 2 A Max 12V DC 0 6A Typ 1 2 A Max Seek Acess 5V DC 0 7A Typ 1 2 A Max 12V DC 1 0A Typ 1 8 A Max 5 3 Standby Sleep mode No disc 2 5 W Typ 3 0 W Max 6 AUDIO PERFORMANCE Item Typical Test Signal Test Condition Note Output Level 0 7 Vrms 1KHz 0 dB No Filter Frequency r...

Page 9: ... Eject button This button is pressed to open the CD tray This button works only when power is supplied to the drive If an Audio CD is playing pressing this button will stop it and pressing it again will open the tray 3 Emergency Eject Hole Insert a paper clip here to eject the Disc tray manually or when there is no power 4 Drive activity indicator Green colored LED is used to indicate the operatio...

Page 10: ... circuit and damage the system Always turn the power OFF when connecting or disconnecting the cable 3 Jumper Connector This jumper determines whether the drive is configured as a master or slave Changing the master slave configuration takes effect after power on reset 4 Analog Audio Output Connector Provides output to a sound card analog signal Generally you need this to play a regular audio CD 5 ...

Page 11: ...it Board A Remove the Cabinet in the direction of arrow 4 See Fig 1 3 B Release 2 hooks a and remove the CD Tray drawing forward C Remove the Main Circuit Board in the direction of arrow 5 D At this time be careful not to damage the 4 connectors are positioned at left and bottom sides of the Main Circuit Board 2 MECHANISM ASSY DISASSEMBLY 2 1 Pick up Unit A Release screws B B Separate the Pick up ...

Page 12: ...2 2 Pick up A Release 1 screw C and remove the Pick up Pick up Unit Pick up C C Fig 2 2 12 ...

Page 13: ...A 007 A02 A01 A03 021 028 029 452 032 452 020 021 050 014 413 413 413 001 413 430 010 009 008 011 012 005 035 016 015 004 006 A B C D E F G H 1 2 3 4 5 013 452 024 024 452 031 027 026 033 025 430 419 020 449 023 003 002 13 14 EXPLODED VIEW ...

Page 14: ...hanged conditions of disc and change in operating temperature Jitter The 16 value of the time variation between leading and trailing edges of a specific I3 I11 pit or land as measured by Time Interval Analysis Deviation The difference between a fixed value of Pit length and Land length TOC Table Of Contents in the Lead in Area the subcode Q channel contains information about the Tracks on the disc...

Page 15: ...pitch p Radial Direction Iw A O a a Groove Land Radial Error Signal The Groove wobble Average center Actual center CD ROM READ ONLY DISC a 30nm ITEM CD ROM CD R CD RW Standard Yellow Book Orange Book II Orange Book III Record Not available Write once Re Writeable Tracking Signal I11 Itop 0 6 0 6 0 55 M11 0 70 HF Modulation Read Laser Power mW 0 5 mW 0 7 mW 1 0 mW Jitter 35 nsec 35 nsec 35 nsec Ref...

Page 16: ...t and Land on the disc It is so called WORM Write Once Read Many CD It is composed of polycarbonate layer Organic dye layer Reflective layer and Protective layer Gold Silver Reflective layer is used to enhance the reflectivity According to the kinds of Organic dye layer it is divided by Green CD Gold CD Blue CD Laser Wavelength 780 nm Laser Power read 0 7 mW Recording Power 8x 14 20mW 16x 25 35mW ...

Page 17: ... reading is enabled by the difference of reflectivity It is possible to overwrite about 1000 times Laser Wavelength 780 nm Laser Power Read 1 0mW Recording Power Erase 4 18mW Write 6 45mW When disc rewriting new data is overwritten previously recorded data Polycarbonate layer has a Pre Groove which make a track Lens H D Beam Spot Focusing Lens Laser Spot at Constant Read Intensity Reflected Light ...

Page 18: ...Spot Recorded Mark Reflected Light Signal Reflected Light Signal Below ORP Mark Too Short At Optimum Record Power ORP Above ORP Mark Too Long Time 6 Writing process of CD RW Disc Write Power Erase Power Read Power Groove Crystal Amorphous Amorphous Recorded state lower reflectivity Melting quenching Heating gradual cooling Crystal phase Erased state higher reflectivity ...

Page 19: ...Area Lead out Area Center hole Clamping and Label Area Information Area PCA PMA Test Area Count Area Diameter 15 mm Diameter 45 mm Diameter 120 mm Unrecorded Disc Tsl 00 35 65 Tsl 00 15 05 Tsl 00 13 25 Tsl 99 59 74 00 00 00 in out Test Area for performing OPC procedures Count Area to find the usable area immediately in T A Tsl start time of the Lead in Area as encoded in ATIP PMA Program Memory Ar...

Page 20: ...ad_In area so that general Driver can read it Because PCA and PMA area exist before Lead In area General CD Player or CD ROM Drive can t read these areas 9 OPC and ROPC 1 OPC Optimum Power Control This is the first step of writing process because CD writer has its own laser power value and media have different writing characteristics This is determined by the Writing characteristic speed temperatu...

Page 21: ...a close Reference B level value c Normalization of B level is used to eliminate the effect of reflectivity fluctuation The reflected B level value is normalized by the disc reflectivity itself CD R RW Media Write Strategy Determination PCA Test Area Program Area PMA Area Lead In Area Lead out Area OPC PCA Count Area ROPC Recording Capacity of CD R RW 74Minute Recording media 2048 Byte Sector X 75 ...

Page 22: ...24 The differences of DVD R RW DVD R RW discs and DVD ROM 1 Recording Layer LPP Land Pre Pit DVD R RW Disc DVD R RW Disc 0 74um 3T 0 4um DVD ROM Read Only Disc ...

Page 23: ...itch 0 74 0 74 0 74 0 74 0 74 0 74 Minimum pit length 0 4 0 44 0 4 0 4 0 4 0 4 Modulation 0 6 0 6 0 6 0 6 0 6 0 6 Channel bit rate 26 16MHz 26 16MHz 26 16MHz 26 16MHz 26 16MHz 26 16MHz Wobble Frequency 140KHz 140KHz 817 4KHz 817 4KHz Addressing 26 16MHz 26 16MHz Wobble LPP Wobble LPP Wobble ADIP Wobble ADIP Read Power mW 0 7 0 1 0 7 0 1 Write Power mW JItter 8 8 8 8 9 9 Bondinglayer Polycarbonate ...

Page 24: ...ing layer dye Disc substrate Adhesive layer Protective layer Reflective layer Dye layer Substrate Laser beam Disc structure Disc structure Recording Recording is done by changing the organic dye layer and the substrate with a laser when a strong is applied to a disc the temperature of the ortanic dye material goes up the dye is decomposed and the substrate changes at the same time At this time a d...

Page 25: ... Recording layer Phase change material Dielectric layer Disc substrate DVD RW Adhesive layer Protective layer Reflective layer Dielectric layer Recording layer Phase change material Dielectric layer Disc substrate Disc structure Recording principles Recording When a high power laser is applied to the recording material it melts and then becomes amorphous with a low reflection coefficient when it q...

Page 26: ...lses a blocked write strategy where each single mark is created by one continuous pulse 1 1st Method Using Pulsed Write Strategy 3T NRZI T 3 2Tw Ttop dTtop dTle Pb top top le Pp Channel bits N 3 only the top pulse T first pulse lead time dT dT NRZI T 4 2Tw Tw Ttop Tmp Tmp Tlp dTtop dTle Pb top top le lp mp Pp Channel bits N 4 the top pulse T multi pulse T and last pulse T first pulse lead time dT ...

Page 27: ...Tw 1 25Tw dTtop 4 dPp4 Ttop 4 Tlp Ttop 4 Ttop 4 Tmp Tmp Tlp Tlp Tmp N 3 T cm 3 can be optimized individually N 4 T cm 4 x N 3 T T T T P shall be 0 1mW top mp lp w w top c Pp Actual write power Pb Bias Power dPp Additional power Only be applied for the 3T and 4T marks Pc Cooling power Especially at higher recording speeds optimum cooling down of the recording layer after writing a mark may be neede...

Page 28: ...30 5 Writing Pulse Wave Form of DVD RW NRZI Channel bits 2Tw Tw Ttop dTtop Pp Pe Tmp mp T dTera Pp Actual write power Pe Erase Power Pb Bias Power Pb 0mW Tmp ...

Page 29: ...corded Disc PSN 23080H 27080H 27480H 28480H 2A480H 30000H 260540H 261940H 262940H 263940H 267940H in OUT Disc Center Rim area Center hole 1st transition area 2nd transition area Clamping Zone 3rd transtion area Information Zone Diameter 15 mm Diameter 16 mm Diameter 22 mm Diameter 33 mm Diameter 44 mm Diameter 120 mm Disc Center Rim area Inner Disc Count Zone Outer Disc Count Zone 2 Layout of DVD ...

Page 30: ...f OPC algorithm performed in IDT Zone Lead in Zone Lead out Zone Data Zone Inner Disc Test Zone Outer Disc Test Zone Unrecorded Disc PSN 2A480H 2A7C80H 2DC80H 30000H 260540H 262940H 265940H 266140H in OUT Center hole 1st transition area 2nd transition area Clamping Zone 3rd transtion area Information Zone Diameter 15 mm Diameter 16 mm Diameter 22 mm Diameter 33 mm Diameter 44 mm Diameter 120 mm Di...

Page 31: ...M demodulator CiRC error correction Audio DAC Buffer Memory controller CSS controller Atapi interface control Data PLL Servo ADC Focus tracking control output Sled control output CAV Spindle control P up Unit HOP 7531T IC121 RF AMP AN22112A CD DVD IC201 MN103S86G TE CSO GEN FE GEN IC261 DRAM IC262 EEPROM Flash ROM IC263 SRAM ...

Page 32: ... the regional code and plays title in the case of allowed regional code only 2 Management of DVD Disc for the scrambled of data 1 DVD ROM and DVD player of host generate the KEY 1 respectively transfer to opposite part the KEY 2 is received recognizes the data transfer or not with this value and generates the bus key encoded the data 2 Encoded Disc Key and Title Key host is transfer with the bus K...

Page 33: ...MPEG 2 board generates the challenge key 10 Byte and transfers to drive The board and drive generate key 1 5Byte with the challenge key respectively Of course the Algorithm generating the key 1 is not known 3 Compare with the generated key 1 if it corresponds each other the first step of authentication is completed This is a course to identify the MPEG 2 board with a drive 4 The second step of aut...

Page 34: ...UM PLW PNG NZL AUS 4 The disc has the regional code of 8 bit Example The disc manufactured in the U S A has the number one Transfer to MPEG 2 board reading the regional code Receiving data from the MPEG 2 board and output through the monitor If the board is setting to the regional code 1 for the U S A Check the received regional code to number 1 all or not transfer the data to VGA card in accordan...

Page 35: ... C2 0 1u C1 0 1u IC1 EL6938CL IC2 CPOD78AH IC3 CNA2094N IC4 LM20BIM7X VSO 18 OUT2 19 OUT2 20 VSO 21 VSO 22 GND 23 OUT1 24 OUT1 25 VSO NC NC BUSY SEN SDIO SCLK MINI VSL CLK CLKB GND GND NRZE NRZ RWB VSA RSET EN AGND ISLOP IAPC Rfreq SLG 44 Tilt 43 TR 42 TR 41 AF 40 AF 39 GND LDD 38 ENA 37 SLG 36 IAPC 35 VSL25 34 VSA5 33 VSO 32 BUSY 31 SEN 30 SDIO 29 RWB 28 MONITOR 27 SCLK 26 GND LDD 25 NRZB 24 NRZ ...

Page 36: ...mperature 22 CLK I CLOCK for NRZ code input LVDS 23 CLKB I CLOCK for NRZ code input LVDS 24 NRZ I NRZ laser data H mark L space LVDS 25 NRZB I NRZ laser data H mark L space LVDs 26 GND LDD Ground connection for LD Driver IC 27 SCLK I Serial control clock 28 MONITOR O Monitor output 29 RWB I Write enable for NRZ laser data L write H read 30 SDIO I O Serial data for parameters and control in out 31 ...

Page 37: ...d A D B C k x EF1 EF4 EF2 EF3 This signal is generated in RF IC IC121 AN22112A and controls the pick up s left and right shift to find to track on Disc 3 RF Signal A B C D This signal is converted to DATA signal in DSP IC IC201 MN103S86G 39 Pick Up module Photo Diode Tracking Focusing Infrared Iaser k F H E G A D B C A D B C k F H E G Offset TE Tp Sub2 Main Tp 2 Sub1 Track Center F E D C A B H G ...

Page 38: ... Circuit Operation The ALPC block detects the laser output power of the front monitor The power signal detected with the PD for front monitor detection is input the voltage from the VPD pin 126Pin or the FPDM pin 127Pin the reference signal of the input signal is input from the VREFPD pin 128Pin The ALPC block generates the singals from the input laser power signals in the following detection syst...

Page 39: ...A B C D E F G H A B C D E F G H IC121 A N22112A FE TE IC201 Servo Control MN103S86G TE FE A D D A C SLED COMPENSATOR A D PARALLEL DIGITAL COMPENSATOR SDRV 62 66 68 69 STEP2 STEP1 IC301 BD7954FS 30 29 M Stepping Motor Logic A 40 39 38 37 A B B Tracking Focusing Actuator T T F F 5 4 LEVEL SHIFT FDRV TDRV LEVEL SHIFT 53 54 52 51 Focus Tracking Sled Servo ...

Page 40: ...e servo is as following 1 Wobble CLV 4x 10x 16x 24x 32x 40x Blank area in CD R CD RW 2 Wobble CLV 1x 2x 2 4x 4x 8x Blank area in DVD R RW 3 CD 15x CAV Video CD CD DA Audio out 4 CD 32x CAV CD RW CD DA DAE 5 CD 40x CAV CD ROM R 6 DVD 8x CAV Single Layer DVD ROM Movie Dual Layer DVD ROM DVD RW DVD RW DVD R Double Layer 7 DVD 10x CAV DVD R DVD R 6 DVD 16x CAV Single layer DVD ROM Data Spindle Servo i...

Page 41: ...1 24 COFTR 15 VCC6 16 VHALF 17 CTC 18 CXDPH1 19 CXDPH2 20 MOUT2 25 GND1 26 PO0 27 PO1 28 PO2 29 PO3 30 PO4 31 PO5 32 PO6 33 STMOUT 39 TO 40 OFTR 41 BDO 42 VCC51 43 GND5 44 WTGT 45 PIO0 34 PIO1 35 PIO2 36 PIO3 37 FEPIDGT SH6 46 SH7 47 WIDGT SH4 48 SH3 49 SH2 50 SH1 51 SH5 52 VCC4 53 SEN 54 SCK 55 SDAT 56 RSEN 57 RSDAT 58 VCC52 59 GND4 60 ASENV LPPM 61 LPPS 62 WBL 63 CLUMPGT 64 PAD0 65 PAD1 66 PAD2 ...

Page 42: ... SSFEP SSFEPN SMTEP SMTEN SSTEP SSTEN SDAAOUT SDABOUT SDACOUT SDADOUT SDPDTEP SRFMA SRFMD SRFMB SRFMC SDPDTEN SPLAOUT SPLBOUT SPOF TCOP TCO TCON TIOP TIO SBDOAS TION LPF VGA VGA COMP PK ENV PK ENV LPF COMP VGA Bypass VGA Bypass M P X M P X DPD RE Dielectro TC TI Dielectro HDVREF VHALF VREF08 RFP CDRFP RFN CDRFN BDO RF OUT RFIN1 RFIN2 EQOUTP EQOUTN VREF GATE All Sum VG A Grow delay conpensation SW ...

Page 43: ... Power supply pin for DPD internal current source power supply pin 3 3V 17 VHALF O 1 2 VCC 3 3V output pin 18 CTC I Capacitor connection pin for TE binary floating 19 CXDPH1 I Peak Env capecitor connection pin 1 for LPOS 20 CXDPH2 I Peak Env capecitor connection pin 2 for LPOS 21 SEO1 O Output pin 1 after selection of each error signal 22 SEO2 O Output pin 2 after selection of each error signal 23...

Page 44: ...tection sample and hold timing signal input pin pull down 52 SH5 I Sample and hold timing signal input pin of wobble S H at recording pull down 53 VCC4 Power supply pin for internal LOGIC 5 0V 54 SEN I Serial enable input pulldown 55 SCK I Serial clock input pullup 56 SDAT I O Serial signal data input 57 RSEN I Serial enable input for RF pulldown 58 RSDAT I Serial signal data input for RF 59 VCC52...

Page 45: ...n 92 CWAGC1 I AGC adjustment capacitor connection pin 1 for WBL extraction 93 CWBLHPF2 I Capacitor connection pin for N side HPF before WBLAGC 94 CWBLHPF1 I Capacitor connection pin for P side HPF before WBLAGC 95 RFP I DVD RF differential input pin 96 RFN I DVD RF differential input pin 97 CDRFP I CD RF differential input pin 98 CDRFN I CD RF differential input pin 99 CDHPF I Internal RF addition...

Page 46: ...I CD sub signal input pin 1 121 FIN I CD sub signll input pin 2 122 GIN I CD sub signla input pin 3 123 HIN I CD sub signla input pin 4 124 DACOUT O Wide Use DAC output pin 125 VREF08 O 0 8V referece Voltage output for APC pin 126 VPO I DVD front monitor signal input pin for APC 127 FPDM I CD front monitor signal input pin for APC 128 VREFPD I Front light system reference level input pin ...

Page 47: ...VSSDRC P02 FMSW PO3 WTGT WBL FEPIDGT SH5 WIDGT SH3 SH2 SH1 TC CLUMPGT ASENV POLGT LPPS OFTR P04 GENE0 TRCDATA3 EXTRIG2 TGCHG P05 LSEN FADR3 FADR2 FADR1 MA4 MA3 MA5 MA2 MA6 MA1 MA7 MA0 VDD3 VSS MA8 MA10 MA9 P15 TRCDATA3 EXTR1G2 MBA1 P14 TRCDATA2 EXTR1G1 MA11 MBA0 MCKB MNRAS MCLK MNCAS MDQMU MNWE MDQML VDD3 VDD15 VSS MDQ8 MDQ7 MDQ9 MDQ6 MDQ10 MDQ5 MDQ11 MDQ4 MDQ12 MDQ3 MDQ13 MDQ2 MDQ14 MDQ1 MDQ15 MD...

Page 48: ... Block Diagram SODC MN103S86G 50 FEP LDD FEP DRC CD SERVO ADSC CD REC PERIPHERAL 32 bit CPU ANALOG CPU BCU FMT HOST 16 9MHz SDRAM 16 Mbit 64 Mbit Falsh ROM 2 Mbyte ECC HOST I F ...

Page 49: ...nection pin for wobble PLL 18 CPOP3 I O Cap Res Filter connection pin for wobble PLL 19 CPOP2 I O Cap Res Filter connection pin for wobble PLL 20 CPOP1 I O Cap Res Filter connection pin for wobble PLL 21 AVSSD1 GND GND WOBBLE analog Vpp 22 SEO1 I FEP Error signal output after selection analog input 23 SEO2 I FEP Error signla output after selection analog input 24 AVSSA GND GND Servo analog to digi...

Page 50: ...GT O FEP RF AGC bias circuit clamp signal 48 ASENV I FEP ASENV LPP mark input 49 POLGT O FEP CAPA polarity switch signal sub beam sampling signal 50 LPPS I FEP LPP space input 51 OFTR I FEP Off track input 52 PO4 CPU external interrupt general purpose I O GENE0 I O Inner limit switch input TRCDATA3 Trace data 3 EXTRIG2 Trigger 2 53 TGCHG I O OEIC Write power switch signal P05 General purpose I O 5...

Page 51: ...indle FG input 5V input 72 SEN O FEP FEP serial interface enable 73 SCK O FEP FEP serial interface clock 74 SDAT I O FEP FEP serial interface data 75 RSEN O FEP FEP serial interface enable2 RF 76 RSDAT O FEP FEP serial interface data2 RF 77 BDO I FEP Dropout signal 78 MASTER I O HOST ATAPI master slave signal P23 General purpose I O 79 NRESET I HOST ATAPI reset signal 80 HDD7 I O HOST ATAPI data I...

Page 52: ...stic signal from ATAPI slave to master 110 DA0 I O HOST ATAPI host address signal 111 DA2 I O HOST ATAPI host address signal 112 NCS1FX I HOST ATAPI host chip select signal 113 VSS GND GND Digital Vss 114 VDD5 Power supply Power supply 5V reference power supply 115 VDD3 Power supply Power supply I O pad Vpp 3 3V 116 NCS3FX I HOST ATAPI host chip select signal 117 NDASP I O HOST ATAPI drive active ...

Page 53: ...AM Debugging trace data EXTRIG1 Trigger MA11 SDRAM address P15 General purpose I O 146 TRCDATA3 I O SDRAM Debugging trace data EXTRIG2 Trigger MBA1 SDRAM bank switch 1 147 MA9 O SDRAM SDRAM address 148 MA10 O SDRAM SDRAM address 149 MA8 O SDRAm SDRAM address 150 VSS GND GND Digital Vss 151 VDD3 Power supply Power supply I O pad Vpp 3 3V 152 MA0 O SDRAM SDRAM address 153 MA7 O SDRAM SDRAM address 1...

Page 54: ...LASH Flash ROM address 179 FADR13 I O FLASH Flash ROM address 180 FADR14 I O FLASH Flash ROM address 181 FADR15 I O FLASH Flash ROM address 182 FADR16 I O FLASH Flash ROM address 183 FDT15 I O FLASH Flash ROM data 184 FDT7 I O FLASH Flash ROM data 185 FDT14 I O FLASH Flash ROM data 186 FDT6 I O FLASH Flash ROM data 187 FDT13 I O FLASH Flash ROM data 188 FDT5 I O FLASH Flash ROM data 189 FDT12 I O ...

Page 55: ...data DRC monitor 0 206 SCLOCK I O Debugger clock DRC monitor 1 207 DASPST I O DASP setting TRCDATA0 Trace data 0 208 MSTPOL I O MASTER pin polarity switch TRCDATA1 Trace data 1 209 VSS GND GND Digital Vss 210 OSCI I Xtal Oscilator input 16 9344MHz 211 OSCO O Xtal Oscilator output 212 VDD3 Power supply Power supply I O pad Vpp 3 3V P17 General purpose I O 213 TRCDATA2 I O Trace data 2 EXTRIG1 Exter...

Page 56: ...OSG Polarity COMP 47k 47k 47k 47k 47k 33 6k 33 6k 1 54 LDO ACO1 53 ACO1 52 ACO2 51 ACO2 50 ACO3 49 ACO3 48 AV 47 ACTIN3 46 LDIN 45 AGND 44 SPCNF 43 FG 42 V 41 fin 40 SLO1 39 SLO1 38 SLO2 37 SLO2 36 SLGND 35 CTL2 34 CTL1 33 SLRNF2 32 SLRNF1 31 SLVDD C M 30 SLIN2 29 SLIN1 28 DVcc 2 LDO 3 Vcc 4 ACTIN1 5 ACTIN2 6 OPIN1 7 OPOUT1 8 OPIN2 9 OPOUT2 10 PGND1 11 U 12 SPV 1 13 V M M 14 fin 15 PGND2 16 W 17 S...

Page 57: ... PWM block pre ground No Symbol Description 54 ACO1 Actuator driver 1 positive output 53 ACO1 Actuator driver 1 negative output 52 ACO2 Actuator driver 2 positive output 51 ACO2 Actuator driver 2 negative output 50 ACO3 Actuator driver 3 positive output 49 ACO3 Actuator driver 3 negative output 48 AVM Actuator driver block power supply 47 ACIN3 Actuator driver input 3 46 LDIN Loading driver input ...

Page 58: ...pindle driver current detection input Hall bias FG signal output 12 10 15 17 16 13 11 22 20 28 28 28 24 23 21 25 32 33 38 40 36 37 39 49 51 53 48 48 48 50 52 54 45 2 3 3 3 45 1 19 3 43 28 5 4 46 47 3 3 47k 10pP Ω Reference voltage input Opamp output Opamp input 29 30 28 28 47k 3pP Ω 44 28 10kΩ 26 28 28 47k 3pP Ω 3 Control signal input 34 35 28 28 50kΩ 50kΩ 50kΩ 6 8 3 1 9 3 3 16 3 1 25kΩ 50kΩ 50kΩ ...

Page 59: ...IC Check the IC201 IC121 Does the pin 1 Reset of IC271 change 0V to 3 3V at the power supply initial input mode Power Is the pin 5 of IC401 3 3V Reference 1 65V VREF Check pin113 of IC121 2 2V HDVREF Check pin78 of IC121 NO NO YES YES YES YES 61 Are the X201 oscillating Check the X201 16 9MHz Check the IC201 NO Check the IC401 NO Check the IC121 NO Check it after connecting the power cable only on...

Page 60: ...e tray Insert DVD R RW Disc and check rotation Does Disc rotate continuously and the drive recognize the disc Does Disc rotate continuously and the drive recognize the disc Does Disc rotate continuously and the drive recognize the disc Go to Sled operating is abnormal Go to Laser operating is abnormal Go to Recognition fail Case1 CD ROM Disc Go to Recognition fail Case2 Blank CD R RW Go to Recogni...

Page 61: ...connction of IC201 pin 203 Replace the EJECT SW Check the connctor CN303 Replace the IC301 Is the input voltage 0V at IC201 pin204 OPENSW when push the SW302 Is the input voltage 0V at IC201 pin63 LOADSW when push the SW301 YES NO NO Check the connction of IC201 pin 66 Replace theIC201 Check the communication line between IC201 NO YES YES YES NO Is there Tray drive voltage output IC301 pin 1 2 Is ...

Page 62: ...1 Is DRVMUTE2 signal H IC301 pin 35 Check the R316 R317 Check the connection of IC121 pin 32 Is there Sled drive voltage output CN302 pin 1 2 3 4 Replace the Sled Motor YES NO NO YES YES Check the Connection CN302 NO Is there Sled drive voltage input IC301 pin 29 30 YES NO Is there Sled drive voltage output IC301 pin37 38 39 40 YES NO ...

Page 63: ...oltage output IC301 pin 11 13 16 Is there Spindle drive voltage output IC301 pin 1 2 3 Check the Connection CN301 Replace the Spindle Motor NO NO NO YES YES Is there FG signal input IC201 pin 71 NO YES YES Check the output of IC301 pin 43 Check the connector CN301 Replace the IC301 Replace the IC201 OK ...

Page 64: ...rmal Is there Focus Search control signal input IC301 pin5 Is DRVMUTE2 signal H IC301 pin 35 ReplacetheIC301 ChecktheconnectionCN101pin40 41 Check the connection of IC121 pin 32 Replace the IC121 NO YES Replace the Pick Up Is there Focus Search drive voltage output IC301pin51 52 NO Check the connection of IC201 pin 62 Check the communication line between IC121 and IC201 Replace the IC201 YES NO YE...

Page 65: ...121 NO Replace the IC201 Check the Drive IC IC301 and P U referring to Focus Actuator operating is abnormal Is there TDRV signal output in Tracking ON IC201 pin66 NO Is PICK UP E F G H output normal CN101 pin5 8 9 12 YES YES NO IC121 pin24 is MOUT1 FEP Monitor1 After disc recognition action Monitor port is off So please check TE signal during disc recognition ...

Page 66: ...signal IC121 Pin81 RFOUT was 500 1000mVpp NO Go to LD CHECK YES NO ReplaceIC121 YES Check EQOUTP waveform IC121 Pin 74 was 800 1200mVpp NO Goto TrackingServoisunstable YES YES Check after replacing IC201 It is OK NO Recognition Fail Case2 Blank CD R RW Is there WBL IC201 pin39 signal Check the connection between IC201 and IC121 Replace IC121 Replace the IC201 NO YES Is there WBL IC121 pin63 signal...

Page 67: ...il Case 4 Blank DVD R RW Replace IC201 Replace IC121 Check the connection between IC121 and IC201 YES NO NO Is there WBL IC201 pin39 Signal YES NO Is there RF signal at CN121 Pin81 YES Replace the Pickup NO Replace the IC121 Is there RF signal at IC121 Pin95 RFP and Pin96 RFN YES NO Replace the IC201 Check again after the replace IC121 It is OK OK ...

Page 68: ...o Writing Part Check YES NO Remove the Dust Fingerprint and if the disc has long width Scratch change it Does the disc have any Dust Scratch Fingerprint YES NO Use LG bundle Software Write Tool Version Is the write Tool version supported by LG DVD RW Drive YES NO NO Check disc information on Writng Tool If you get some data information with Non Recordable Disc Message the disc is finalized Finaliz...

Page 69: ... the IC201 Check the connection of L R OUT Insert the audio Disc NO AUDMUTE L IC121 Pin 33 DSP ROUT LOUT signals output IC201 Pin 10 11 Do audio Line signals output CN271 pin 51 54 NO NO Check and replace the IC305 Do audio signals output IC305 Pin1 L CH Pin7 R CH NO YES YES YES Normal ...

Page 70: ...me Directory 3 If you use GWA 4083B Dragon 2004 08 24 AS will be displayed on the window Frame 4 Select I F Setup on the menu bar 5 Select ATAPI I F and then Click OK 6 Select Target Device on the menu bar 7 Select DVDRRW GWA 4083B on Target Device and then Click OK How to use Test Tool Dragon I F Setup Menu Target Device window ...

Page 71: ...ill be displayed 3 Click ALPC Para tab and verify the specification ALPC Parameters CD 1 CD READ Coeff 90 150 2 CD WRITE Coeff 90 150 DVD 10 39 3 DVD READ Coeff 90 150 4 DVD WRITE Coeff 90 150 5 Default ALPC Para used 0xFF 6 H C CD Write Coeff 130 4 Close window ALPC Parameters Menu Additional Function Menu ...

Page 72: ...LD 5 Measure LD Power with LD Power meter Type the result in the blank Read Power box ex 1 76mW 176 0 88 88 6 Click VWDC button and follow above step 6 But VWDC result should be filled in the Write Power box ex 8 74mW 874 4 89 489 7 Click Setup button and Result will be displayed with OK or NG 8 Select DVD and change wave length of LD Power meter 660nm 9 Follow above step 5 6 7 8 10 Close Laser Po...

Page 73: ...t D Laser Inspection VRDC VWDC FPD Level Check 1 Remove disc on the Tray 2 Select ALPC OPC on the menu bar and select LD Test menu then LD Test window will appear 3 Click Trigger button then the result will be displayed with OK or NG separately 4 Close LD Test window ...

Page 74: ...01 MN103S86G Pick up HOP7531TS BA3258 IC401 3 3 1 5V Reg 5V_source Reset IC IC271 BD5233 Drive IC Actuator BD7954 Audio op Amp IC305 NJM3404 RF IC IC121 AN22112A DSP IC IC201 MN103S86G Pick up HOP7531TS AT25320AN_10SJ_2 7 IC101 2 7V Reg SDRAM IC261 M12L16164A Flash Memory IC262 EEPROM IC263 AT25320 EEPROM IC201 MN103S86G Power Supply System Diagram ...

Page 75: ... RF EQ GCC Wobble JLINE MPX Write Strategy LVDS Serial I F ADC Servo ADSC FMT Servo DRC ECC BCU 1M bit DRAM 32bit CPU Host I F Host PC Authoring Tool Buffer RAM PWM BSDA Controller Serial I F FEP RF AN22112A SODC DSP MN103S86G I V AMP Spindle motor Spindle Driver 77 BLOCK DIAGRAM ...

Page 76: ... Block RFEQ Block JLINE Block LOGIC Block RF Gene Block GATE Block To each Block VREF Block TEC Block LPOS Block SDRAM 16 64Mb Built in System Controller 32Bit CPU Flash ROM AD ADIP DRC CD ADIP FORMATTER ECG EEPROM 4KByte AD SRAM ADSC DA VCO CIRC CD PRE ANALOG SERVO DSP 32bit CD REC PERIPHERAL BCU A D AUTH SYSIF INTC TMR KCGEN MODEC WDT AM DMA ENC DEC HOST I F ATAPI I F MPEG I F RV5 SODC MN103S86G...

Search results

Summary of Contents for GWA - 4083B

Reviews:

Related manuals for GWA - 4083B

Brands by name

Popular brands

LG GWA - 4083B, Service Manual

Search results

Summary of Contents for GWA - 4083B

Reviews:

Related manuals for GWA - 4083B

Brands by name

Popular brands