LG GWA-4164B Service Manual
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LG GWA-4164B Service Manual

Dvd/cd rewritable drive
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DVD/CD Rewritable Drive
S E RVICE MANUAL
MODEL: G WA - 4 1 6 4 B /
G WA - 4 1 6 6 B /
G S A - 4 1 6 6 B
P/NO : 3828HS1049D
J u l y, 2005
Printed in Korea
MODEL : GWA-4164B/GWA-4166B/GSA-4166B

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Summary of Contents for LG GWA-4164B

  • Page 1 MODEL: G WA - 4 1 6 4 B / G WA - 4 1 6 6 B / G S A - 4 1 6 6 B P/NO : 3828HS1049D J u l y, 2005 Printed in Korea MODEL : GWA-4164B/GWA-4166B/GSA-4166B...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ..................................3 FEATURES....................................4 SPECIFICATIONS................................5~14 LOCATION OF CUSTOMER CONTROLS ........................15~16 DISASSEMBLY .................................17~18 1. CABINET and CIRCUIT BOARD DISASSEMBLY ......................17 2. MECHANISM ASSY DISASSEMBLY..........................17 EXPLODED VIEW ................................19~20 MECHANICAL REPLACEMENT PARTS LIST ........................21~23 GLOSSARY .....................................24 THE DIFFERENCES OF CD-R/CD-RW DISCS AND GENERAL CD-ROM..............25~29 1.

  • Page 3: Introduction

    PCs without compatible computer. It can write as much as 700 the need of an additional interface card. Mbytes of digital data into CD-R/RW disc, and can GSA-4164B series Design Specfications • Write GWA-4164B GWA-4166B GSA-4166B Light Scribe CD-R 40x w...

  • Page 4: Features

    FEATURES 1 General 1) Enhanced IDE (ATAPI) interface. 2) Internal Half-height Drive. 3) CD-R/RW, DVD-R/RW/+R/+R DL(Double Layer)/+RW read and write compatible CD Family and DVD- ROM read compatible. 4) Buffer Under-run prevention function embedded. 5) 2MB buffer memory. 6) Power loading and power eject of a disc. Bare media loading. 7) MTBF : 100,000 POH 8) Vertical and Horizontal installable.

  • Page 5: Specifications

    SPECIFICATIONS I. MODEL : GWA-4164B 1. SYSTEM REQUIREMENTS -CPU: IBM Compatible Pentium4 1.6GHz (or faster) (For High speed, 2GHz or faster recommended.) -128MB Memory or greater • SUPPORTING OPERATING SYSTEM * Operating System * Recording tool Window 98 Second Edition (Not supported in...
  • Page 6 3. DRIVE PERFORMANCE 3.1 Host interface ............X3T13 ATA/ATAPI5/1321D INF-8090i Rev.5.3 3.2 Read/Write & Rotational speed <Read> CD-R/ROM, data/CD-I ......17x ~ 40x (CAV), Approx. 8,100r/min CD-RW ..........15x ~ 32x (CAV), Approx. 6,500 r/min CD-DA (DAE)........17x ~ 40x (CAV), Approx. 8,100 r/min CD-DA (Audio out)/VideoCD ....
  • Page 7 3.3 Data transfer rate 3.3.1 Sustained transfer rate <Read> CD-ROM/R.............2,550 ~ 6,000 kbytes/s (40x) Max. CD-RW............2,250 ~ 4,800 kbytes/s (32x) Max. CD-DA(DAE) ..........2,550 ~ 6,000 kbytes/s (40x) Max. DVD-ROM ....Single layer......9.28 ~ 22.16 Mbytes/s (16x) Max. Dual layer ......4.58 ~ 11.08 Mbytes/s (8x) Max. DVD-R............5.73 ~ 13.85 Mbytes/s (10x) Max.

  • Page 8: Power Requirements

    3.7 LightScribe Label Printing * Note (1) DRF Parameters for this spec : LV=250mm/sec, TrackShift=85, Laser Power=34mW 3.7.1 Printing Time 1070TPI * 12cm Entire Disc........less than 36 minutes 800TPI * 12cm Entire Disc.........less than 28 minutes 530TPI * 12cm Entire DIsc ........less than 20 minutes 3.7.2 Image Contrast complying to the colorimetry standard CIE L*a*b, defined as Delta L( ∆L) 1070TPI * LS CD-R Media (973423 : 795973)...higher than 28 800TPI * LS CD-R Media (973423 : 795973).....higher than 20...

  • Page 9: Acoustic Noise

    3. Ambient temperature : Normal temperature 4. Except loading, unloading and seek 8. Dimensions External dimensions (W x H xD) 146x41.3x184.7mm Front bezel (WxHxD) 148x42x5 mm 9. Mass ..........880g+/-10g(net) * Please Contact the friendly staff of LG Service Care at: Website http: //www.LGEservice.com...
  • Page 10 SPECIFICATIONS II. MODEL : GWA-4166B 1. SYSTEM REQUIREMENTS -CPU: IBM Compatible Pentium4 1.6GHz (or faster) (For High speed, 2GHz or faster recommended.) -128MB Memory or greater • SUPPORTING OPERATING SYSTEM * Operating System * Recording tool Window 98 Second Edition (Not supported in (1) RecordNow (Sonic) LightScribe) (2) DLA (sonic)
  • Page 11 3. DRIVE PERFORMANCE 3.1 Host interface ............X3T13 ATA/ATAPI5/1321D INF-8090i Rev.5.3 3.2 Read/Write & Rotational speed <Read> CD-R/ROM, data/CD-I......17x ~ 40x (CAV), Approx. 8,100r/min CD-RW ...........15x ~ 32x (CAV), Approx. 6,500 r/min CD-DA (DAE) .........17x ~ 40x (CAV), Approx. 8,100 r/min CD-DA (Audio out)/VideoCD ....
  • Page 12 <Write> CD-R .....10x,16x (CLV) ....1.5, 2.4 Mbytes/s (Mode-1) 24x (ZCLV)......1.8 ~ 3.6 Mbytes/s (Mode-1) 40x(CAV)......2.4 ~ 6.0 Mbytes/s(Mode-1) CD-RW ....4x, 10x (CLV) ....0.6, 1.5 Mbytes/s (Mode-1) 16x (ZCLV)......1.8 ~ 2.4 Mbytes/s (Mode-1) 24x (ZCLV)......1.8 ~ 3.6 Mbytes/s (Mode-1) 32x (ZCLV)......1.8 ~ 4.8 Mbytes/s (Mode-1) DVD-R ....2x, 4x(CLV), 8x(ZCLV) ..2.77, 5.44, 5.44~11.08 Mbytes/s 12x, 16x (CAV)....8.91~16.62 Mbytes/s 8.91~22.16 Mbytes/s...
  • Page 13 3.7 LightScribe Label Printing * Note (1) DRF Parameters for this spec : LV=250mm/sec, TrackShift=85, Laser Power=34mW 3.7.1 Printing Time 1070TPI * 12cm Entire Disc........less than 36 minutes 800TPI * 12cm Entire Disc.........less than 28 minutes 530TPI * 12cm Entire DIsc ........less than 20 minutes 3.7.2 Image Contrast complying to the colorimetry standard CIE L*a*b, defined as Delta L( ∆L) 1070TPI * LS CD-R Media (973423 : 795973)...higher than 28 800TPI * LS CD-R Media (973423 : 795973).....higher than 20...
  • Page 14 3. Ambient temperature : Normal temperature 4. Except loading, unloading and seek 8. Dimensions External dimensions (W x H xD) 146x41.3x184.7mm Front bezel (WxHxD) 148x42x5 mm 9. Mass ..........880g+/-10g(net) * Please Contact the friendly staff of LG Service Care at: Website http: //www.LGEservice.com...

  • Page 15: Location Of Customer Controls

    LOCATION OF CUSTOMER CONTROLS Front Panel Emergency Eject Hole Disc Tray Stop/Eject Button Drive Activity Indicators 1. Disc tray 3. Emergency Eject Hole This is the tray for the disc. Place the disc on the Insert a paper clip here to eject the Disc tray ejected disc tray, then lightly push the tray (or manually or when there is no power.

  • Page 16: Rear Panel

    Rear Panel IDE Interface Connector Analog Audio Output Connector Jumper Connector Power Connector Digital Audio Output Connector 1. Power Connector 3. Jumper Connector Connects to the power supply (5-and 12-V DC) of This jumper determines whether the drive is the host computer. configured as a master or slave.

  • Page 17: Disassembly

    DISASSEMBLY 1. CABINET and CIRCUIT BOARD 1-3. Cabinet and Main Circuit Board A. Remove the Cabinet in the direction of arrow (4). DISASSEMBLY (See Fig. 1-3) 1-1. Bottom Chassis B. When the CD tray has been opened completely, lift A. Release 4 screws (A) and remove the Bottom Chassis 2 points (a) and remove the CD tray while drawing in the direction of arrow (1).
  • Page 18 2-2. Pick-up A. Release 1 screw (C) and remove the Pick-up. Pick-up Unit Pick-up Fig. 2-2...

  • Page 19: Exploded View

    EXPLODED VIEW PBM00 (MAIN C.B.A) PBF00 (FRONT C.B.A)

  • Page 20: Glossary

    GLOSSARY ATIP Absolute Time in Pre-groove. With an additional modulation of the “Wobble”, the “Groove” contains a time code information. Wobble The pre-groove in the Disc is not a perfect spiral but is wobbled. With : – A typical amplitude of 30 nm –...

  • Page 21: The Differences Of Cd-R/Cd-Rw Discs And General Cd-Rom

    The differences of CD-R/CD-RW discs and General CD-ROM 1. Recording Layer Recordable CD has a wobbled pre-groove on the surface of disc for laser beam to follow track. Track pitch(p) a=30nm Read-only Disc CD-ROM (READ-ONLY DISC) Radial Direction Radial Error Signal 0.4~0.5 um Groove Land...

  • Page 22: Disc Materials

    3. Disc Materials 1) CD-ROM disc • It is composed of Silver _ colored aluminum plate and Reflective layer. • Groove (Pit) of aluminum plate make a track. • Laser wavelength : 780 nm, Laser Power (Read): 0.5mW • Signal is detected by the difference of reflective beam intensity between “pit”...

  • Page 23: Reading Process Of Optical Disc

    3) CD-RW Disc Label Printing Protective Layer Dielectric Layer(TL) Recording Layer Dielectric Layer(UL) Substrate (Polycarbonate) Groove Laser Beam • It is composed of polycarbonate layer, alloy(silver, arsenic) layer, aluminum reflectivity layer, protective layer. • An crystalized alloy layer is transformed into noncrystalized by the laser heat. Therefore, writing and reading is enabled by the difference of reflectivity.

  • Page 24: Writing Process Of Cd-R Disc

    5. Writing Process of CD-R Disc Incident (Write) Laser Power (Read) (Read) Laser Spot a b c d e f Position (Time) Laser Below "ORP"– Mark Too Short Spot Reflected At Optimum Record Power ("ORP") Light Signal Above "ORP" – Mark Too Long Recorded Mark Time...

  • Page 25: Organization Of The Pca, Pma And Lead-In Area

    7. Organization of the PCA, PMA and Lead-in Area 1) Layout of CD-ROM disc Disc Center Diameter 120 mm Diameter 46 mm Diameter 15 mm Center hole Clamping and Label Area Information Area Read Only Disc Lead-in Area Program Area Lead-out Area 2) Layout of CD-R/RW disc Disc Center...

  • Page 26: Function Of Pca And Pma Area

    8. Function of PCA and PMA area 1) PCA (Power Calibration Area) • PCA area is used to determine the correct Laser Power for a disc. – Method 1 : PCA area is divided by a track. – Method 2 : The previous Calibration value is referred. –...

  • Page 27: Writing Process Of Disc

    2) ROPC (Running Optimum Power Control) • Variable primary factor of Optimum Power – Change of Power sensitivity on the Disc. (limited to 0.05 *Po) – Wavelength shift of the laser diode due to the operating temperature change. – Change of the Spot aberration due to the Disc skew, Substrate thickness, Defocus.

  • Page 28: The Differences Of Dvd-R/Rw, Dvd+R/Rw Discs And Dvd-Rom

    The differences of DVD-R/RW, DVD+R/RW discs and DVD-ROM 1. Recording Layer DVD-ROM (Read Only Disc) 0.4 um DVD-R/RW Disc (Land Pre-Pit) DVD+R/RW Disc...

  • Page 29: Disc Specification

    2. Disc Specification DVD-ROM DVD-R DVD-RW DVD+R DVD+RW Single-Layer Dual-Layer Media Type Read Only Read Only Phase change Phase change User data capacity 4.7GB 8.54GB 4.7GB 4.7GB 4.7GB 4.7GB Wavelength 650nm 650nm 650nm 650nm 650nm 650nm Reflectivity 45~85% 18~30nm 45~85% 18~30% 45~85% 18~30nm...
  • Page 30 2) Recording format using organic dye material (DVD-R/DVD+R) * The format that records data through the creation of recorded marks by changing the organic dye material with a laser beam. > Disc structure DVD-R DVD+R Adhesive layer Adhesive layer Protective layer Protective layer Reflective layer Reflective layer...
  • Page 31 3) Recording format using phase-change recording material (DVD-RW/DVD+RW) * Data is recorded by changing the recording layer from the amorphous status to the crystalline status, and played back by reading the difference of the reflection coefficient. [ Amorphous : Non-crystalline ] >...

  • Page 32: Writing Pulse Waveform Of Dvd+R

    4. Writing Pulse Wave Form of DVD+R For different speed ranges, different write strategies can be used. This document specifies 2 options: - a pulsed write strategy, where each single mark is created by a number of subsequent separated short pulses.
  • Page 33 2) 2 Method : Using Blocked Write Strategy NRZI Channel bits 1.25T top,3 1.25T 3T mark top,3 top,4 1.25T 4T mark top,4 1.25T 5T mark top,4 1.25T Etc. top,4 N = 3 : T (cm = 3) can be optimized individually. N >...

  • Page 34: Writing Pulse Waveform Dvd+Rw

    5. Writing Pulse Wave Form of DVD+RW NRZI Channel bits Ttop dTera dTtop Pp : Actual write power Pe : Erase Power Pb : Bias Power...

  • Page 35: Organization Of Inner Drive Area, Outer Drive Area, Lead-In Zone And Lead-Out Zone

    6. Organization of the Inner Drive Area, Outer Drive Area, Lead-in Zone and Lead-out Zone 1) Layout of DVD-ROM disc Disc Center Diameter 120 mm Diameter 44 mm Diameter 33 mm Diameter 22 mm Diameter 16 mm Diameter 15 mm Clamping Center 3rd transtion...
  • Page 36 3) Layout of DVD+RW disc Disc Center Diameter 120 mm Diameter 44 mm Diameter 33 mm Diameter 22 mm Diameter 16 mm Diameter 15 mm Clamping Center 3rd transtion Information Zone Zone hole area 1st transition area Rim area 2nd transition area Unrecorded Disc Lead -out Zone Lead-in Zone...

  • Page 37: Lightscribe Media

    LightScribe Media 1. LightScribe Media DiscOD Label Zone Control Feature Zone Clamping/Logo Zone Center Hole Screen Printed Imaging Layer Clear Protective Coating Reflective/Thermal Layer Dye Data Layer Polycarbonate Substrate...

  • Page 38: Hardware Block Diagram Of Lightscribe Label Printing

    2. Hardware Block Diagram of LightScribe Label Printing...

  • Page 39: Md Assy For Lightscribe

    3. MD Assy For LightScribe Optical Encoder Unit...

  • Page 40: Optical Encoder Assy

    4. Optical Encoder Assy Codewheel Direction of radial play Encoder PCB Optical Encoder IC PIN 6 PIN 5 PIN 4 CH A PIN 6 PIN 1 CH B PIN 2 PIN 5 CH A PIN 4 PIN 3 VLED PIN 1 PIN 2 PIN 3 CH B...

  • Page 41: Dvd & Cd Data Processing

    DVD & CD DATA PROCESSING 1. Data Processing Flow...

  • Page 42: Copy Protection And Regional Code Management Block

    2. Copy Protection and Regional Code Management Block Block Diagram Change the "KEY" HOST DVD MN103SA6G PLAYER (EMPEG2 B/D) Scrambled MPEG Data KEY Management Control Brief Process 1. Regional Code for DVD Disc – DVD-ROM drive transfers the regional code of the control data to host by the command of host, the DVD player of host reads the regional code, and plays title in the case of allowed regional code only.

  • Page 43: About Prevention The Dvd-Rom From To Be Copy

    3. About Prevention the DVD-ROM from to be copy A data is able to encode and record in the disc, if a copyright holder wants to prevent the disc from copying. In case of a disc enhanced movie of 3 titles..DISC KEY (2048 Bytes) is used to encode the whole contents in the disc and TITLE KEY (5 Bytes) is used to encode the title respectively.

  • Page 44: About The Dvd-Rom Regional Code

    4. About the DVD-ROM Regional Code Regional code U.S.A PRI. VIR DISC ROM - DRIVE MPEG-2 BOARD VGA CARD MONITOR Transfer to Receiving If the board is setting to the regional The disc has MPEG-2 board data from the code 1 for the U.S.A..the regional reading the MPEG-2...

  • Page 45: Internal Structure Of The Pick-Up

    INTERNAL STRUCTURE OF THE PICK-UP 1. Block Diagram of the PICK-UP(LPC-812R) CXA2694N VC(PDIC) PD4CI VCC(PDIC) GND(PDIC) SW(PDIC) SW(FM) VCC(FM) VREF GND(FM) VREF(FM) FM_OUT DVDO TEMP Themester CP0076AH W1DISN W1DIS W2DISN W2DIS W3DISN W3DIS OSCEN OUTB W3SET W2SET OUTA W1SET RSET OUTSET ENABLE Focus...

  • Page 46: Pick Up Pin Assignment

    2. Pick up Pin Assignment Pin Name Signal Description Tracking Actuator drive signal- Tracking Actuator drive signal+ Tilt- Tilting Actuator drive signal- Tilt+ Tilting Actuator drive signal+ Focusing Actuator drive signal- Focusing Actuator drive signal+ GND(LDD) Ground connection for LDD VCC(LDD) Power supply for LDD ENABLE...

  • Page 47: Signal Detection Of The P/U

    3. Signal detection of the P/U Infrared Iaser Pick-Up module Focusing Tracking Photo Diode 1) Focus Error Signal ==> (A+C)-(B+D) This signal is generated in RF IC (IC121 : AN22113A) and controls the pick-up’s up and down to focus on Disc.

  • Page 48: Description Of Circuit

    DESCRIPTION OF CIRCUIT 1. ALPC (Automatic Laser Power Control) Circuit 1-1. Block Diagram IC 121 CN 101 AN22113A IC 201 VREFPD Optical MN103SA6G Pick-up S/H2 LPC-812R 127 FPDM Erase S/H3 Space S/H1 Write Strategy Signal Serial ADSC 1-2. ALPC (Automatic Laser Power Control) Circuit Operation The ALPC block detects the laser output power of the front monitor.

  • Page 49: Focus/Tracking/Sled Servo Circuit

    2. Focus/Tracking/Sled Servo Circuit 2-1. Focus, Tracking & Sled Servo Process Focus, Tracking, Sled Servo Pick-up Focus Error Detector A,B,C,D A,B,C,D E,F,G,H Focus Error Detector A,B,C,D E,F,G,H IC121 A N22113A IC201 Tracking Focusing Servo Control Actuator MN103SA6G LEVEL SHIFT FDRV PARALLEL LEVEL SHIFT DIGITAL...
  • Page 50 2-2. Focus & Tracking Servo Process(using the LightScribe)

  • Page 51: Spindle Circuit

    3. Spindle Servo Circuit 3-1. Spindle Servo Process IC121 AN22113A Pick-up Wobble Signal WBLIN Generator IC201 MN103SA6G Spindle Motor SERVO DSP Frequency Controller SPDRV Phase Controller IC301 BD7956FS 3-2. Spindle Servo Spindle servo is as following ; Wobble CLV 4x, 10x, 16x, 24x, 32x, 40x : Blank area in CD-R, CD-RW Wobble CLV 1x, 2x, 2.4x, 4x, 8x : Blank area in DVD+/-R/RW CD 15x CAV : Video CD, CD-DA(Audio out) CD 32x CAV : CD-RW, CD-DA(DAE)
  • Page 52 3-3. Spindle Servo Process(using the LightScribe) MECHANISM MN103SA6G 2 or 3 BD7956 BSDA 12bit 100MHz Motor state On/Off Drive IC Optical FG Internal u-P (F/W) Optical Encoder X-TAL 16bit Timer Pre-scale 16.9344MHz Optical Encoder IC...

  • Page 53: Major Ic Internal Block Diagram And Pin Description

    MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION IC121 (AN22113A) : FEP(RF) Analog Signal Processor • Pin Assignment CLUMPGT CDRFP CDRFN LPPS CDHPF ASENV/LPPM DLY1 GND4 DLY2 VCC52 GND2 RSDAT RSEN SDAT AN22113A VCC4 (Top View) 128Pin TQFP VCC1 GND6 WIDGT/SH4 VREF SVREF...
  • Page 54 Block Diagram Operation Circuit...
  • Page 55 • Pin Assignment Pin no. Pin Name Type Function GND3 Ground pin for APC/OPC & ASENV ROPCIN Input pin after OPC addition APCAAF1 Capacitor connection pin for APC mark system AAF APCAAF2 Capacitor connection pin for APC average DC detection system AAF APCAAF3 Capacitor connection pin for APC bottom detection system AAF.
  • Page 56 Pin no. Pin Name Type Function OFTR OFTR signal output BDO output VCC51 Power supply pin for CMOS I/F & internal current source power supply pin 1(3.3V) GND5 Ground pin for CMOS I/F WTGT Light gate signal input (pull-down) FEPIDGT/SH6 CAPA through signal input pin/ servo sampling signal input pin(pull-dowm) WIDGT/SH4 VFO through signal input pin...
  • Page 57 Pin no. Pin Name Type Function RFIN2 RFAGC signal input pin 2 RFIN1 RFAGC signal input pin 1 HDVREF 2.2V reference voltage output pin CWBLBUF Capacitor connection pin for WBLDIF VCC2 Power supply pin for RFGene/RFEQ/WBL/LPP (5.0V) RFOUT RFGene signal output pin CLPPPH Capacitor connection pin for LPP peak hold CLPPHPF...
  • Page 58 Pin no. Pin Name Type Function CD main signal input pin 1 CD main signla input pin 2 N.C. N.C. CD sub signal input pin 1 CD sub signll input pin 2 N.C. N.C. DACOUT Wide Use DAC output pin VREF08 0.8V referece Voltage output (for APC) pin DVD front monitor signal input pin (for APC)
  • Page 59 IC201 (MN103SA6G) : Encoder, Decoder & DSP Singal Processor • Pin Assigment BSMD FADR3 NBSMD FADR2 PKMD FADR1 NPKMD PK2MD MPK2MD PK3MD NPK3MD AVDD33D2 LOUT ROUT AVSSD2 VDD3 VREFH MN103SA6G AVDD33D1 MA10 CPOP5 CPOP4 P15/TRCDATA3/EXTR1G2/MBA1 CPOP3 P14/TRCDATA2/EXTR1G1/MA11 CPOP2 MBA0 CPOP1 MCKB AVSSD1 MNRAS...
  • Page 60 • Block Diagram (SODC:MN103SA6G) HOST HOST SDRAM SERVO 16 Mbit ADSC ANALOG 64 Mbit 16.9MHz PERIPHERAL Falsh 32 bit CPU 2 Mbyte...
  • Page 61 • Pin Table Pin Name Connection Description Number Target BSMD BIAS modulation signal differential current output NBSMD NBIAS modulation signal differential current output PKMD PEAK1 modulation signal differential current output NPKMD NPEAK1 modulation signl differential current output PK2MD PEAK2 modulation signal differential current ouptut NPK2MD NPEAK2 modulation signal differential current ouptut PK3MD...
  • Page 62 Pin Name Connection Description Number Target FMSW Power monitor detector multiplier conversion signal General-purpose I/O WTGT Write gate Wobble binary signal FEPIDGT CAPA punch out signal, main beam sampling signal Write WOBBLE sample and hold sampling signal WIDGT VFO punch out signal, ROPC mark detection sampling signal Sample timing signal for PCA mean value detection, APC space detection, read power detection, and erase detection Sample timing signal for PCA peak, bottom detection, APC peak...
  • Page 63 Pin Name Connection Description Number Target PWM1A DRIVER Focus 2(tilt) drive differential PWM+ output, focus 2 drive BSDA output. PWM1B DRIVER Focus 2(tilt) drive differential PWM-output General-purpose I/O PWM2A DRIVER Tracking drive differential PWM+ output, tracking drive BSDA output General-purpose I/O PWM2B Tracking drive differential PWM-output DRIVER...
  • Page 64 Pin Name Connection Description Number Target VDD3 Power supply Power supply I/O pad V (3.3) HDD1 HOST ATAPI data I/O HDD14 HOST ATAPI data I/O HDD0 HOST ATAPI data I/O HDD15 HOST ATAPI data I/O DMARQ HOST DMA request to ATAPI host NIOWR HOST ATAPI host write signal...
  • Page 65 Pin Name Connection Description Number Target MDQ8 SDRAM SDRAM data Digital Vss VDD12 Power supply Power supply Internal logic Vpp(1.2V) VDD3 Power supply Power supply I/O pad V (3.3V) MDQML SDRAM SDRAM DQML signal MNWE SDRAM SDRAM write enable signal MDQMU SDRAM SDRAM DQMU signal...
  • Page 66 Pin Name Connection Description Number Target FADR6 FLASH Flash ROM address FADR7 FLASH Flash ROM address FADR8 FLASH Flash ROM address FADR17 FLASH Flash ROM address FADR18 FLASH Flash ROM address FADR19 FLASH Flash ROM address General-purpose I/O FADR20 FLASH Flash ROM address General-purpose I/O FLASH...
  • Page 67 Pin Name Connection Description Number Target FLASH Flash ROM chip enable signal IEC958-compliant digital output, debugging serial TX General-purpose I/O NEJECT Mecha Tray eject signal (SODC external interrupt) TRYLOAD Mecha Tray eject signal (SODC external interrupt) General-purpose I/O SDATA Debugger data, DRC monitor 0 SCLOCK Debugger clock, DRC monitor 1 DASPST...
  • Page 68 IC301 (BD7956FS) : CD-ROM/DVD-ROM 7CH POWER DRIVER • Block Diagram LDO- ACO1+ LDO+ ACO1- 100k ACO2+ ACTIN1 ACO2- 100k ACTIN2 ACO3+ TJMON ACO3- 100k BTHC SPVM_S ACTIN3 PGND1 LDIN PGND2 AGND SPCNF SPV 1 SLO1+ PGND3 SLO1- SPV 2 SLO2+ SPRNF SLO2- SLGND...
  • Page 69 • Pin Function Symbol Description Symbol Description LDO- Loading driver negative output ACO1+ Actuator driver 1 positive output LDO+ Loading driver positive output ACO1- Actuator driver 1 negative output BTL pre and Loading power supply ACO2+ Actuator driver 2 positive output ACTIN1 Actuator driver 1 input ACO2-...
  • Page 70 Input/Output circuit diagram Three-phase motor driver output Spindle driver current detection input Hall bias 12.5k Splindle driver feedback filter pin FG signal output Hall signal input 2.5k PWM driver output SLED1, 2 BTL driver output FO, TK BTL driver output LD 32 33 27 36 BTL driver input ACT1,2,3,LD...

  • Page 71: Troubleshooting Guide

    TROUBLESHOOTING GUIDE Reset or Power Check. Check it after connecting the power cable only on interface cable for NO Reset or Power ON. Are the pin 44 of • Check the power(5V/12V) short. CN271+5V, pin41 of CN271+12V • Check the PC power cable. respectively after the power cable •...
  • Page 72 System Check. Load tray without inserting disc. Does Tray operate normally? Go to “Tray operating is abnormal” Does Pick-up move to inside? Go to “Sled operating is abnormal” Go to “Focus Actuator operating is Does Pickup lens move abnormal” up/down? Go to “Laser operating is Does Laser turn on? abnormal”...
  • Page 73 Tray operating is abnormal. Tray open doesn’t work. Is the • input voltage 0V at IC201 Check the connction of IC201 pin 203. • pin203 when push the Replace the EJECT SW. EJECT SW? • Check the connction of IC201 pin 66. Is there Tray •...
  • Page 74 Sled operating is abnormal. Is there Sled control signal output? Replace the IC201. (IC201 pin 68,69) Is there Sled drive voltage input? • Check the R316, R317. (IC301 pin 29,30) Is there Check the connection of IC121 Sled drive voltage output? Is DRVMUTE2 signal ‘H’? pin 32.
  • Page 75 Spindle operating is abnormal Is there Spindle control DSP output? • Replace the IC201. (IC201 pin70) Is there • Is there Check the output of IC301 pin 43. Spindle drive voltage output? • FG signal input? Check the connector CN301. (IC301 pin 11, 13, 16) •...
  • Page 76 Focus Servo is unstable Is FE signal output normal in Focusing Check Pickup Read Power Replace the Pick up. Up/Down? is 1.3~1.7mW? (IC121 pin25*) Replace the IC121. Is FDRV signal output normal in Focusing • Replace the IC201. Up/Down? (IC201 pin 62) * IC121 pin25 is MOUT2(FEP Monitor2).
  • Page 77 Track Servo is unstable Is TE signal Is PICK UP • Check the PICK UP FFC. output normal in Focusing (E, F, G, H) output normal? • Replace the PICK UP. ON and Tracking OFF? (CN101 pin 8, 5, 9, 4) (IC121 pin 24*) Replace the IC121.
  • Page 78 Recognition Fail Case 1: CD-ROM Fail Check Pickup Read Power Go to “LD CHECK”. was 1.3 ~1.7mW? Does Focus Servo Go to “Focus Servo is unstable”. operate normally? Check Pickup Check the Pick-up FFC and CN101. RF signal IC121(Pin81) Replace the Pick-up. RFOUT was 2~2.5V? Check EQOUTP Replace IC121.
  • Page 79 Recognition Fail Case 3 : DVD Disc Check Pick-up Read Power Go to ‘LD CHECK’. was 1.1~1.3mW. Replace the Pickup. Is there RF signal at IC121 Pin81? Is there RF signal at IC121 Pin95(RFP) Replace the IC121. and Pin96 (RFN)? Check again after the replace Replace the IC201.
  • Page 80 Dust, Scratch, Scratch, change it. Fingerprint...? Is the write Use LG bundle Software Tool(version) supported by (Write Tool & Version) LG DVD+RW Drive? Check disc information on Writng Tool. [If you get some data information with “Non Recordable Disc”...
  • Page 81 No audio output Insert the audio Disc. AUDMUTE : ‘L’? • Check and replace the IC121. (IC121 Pin 33) Audio Play : AUDMUTE ‘H’. • DSP ROUT,LOUT signals output? Check and replace the IC201. (IC201 Pin 10, 11) Do audio Line •...
  • Page 82 LS Media Recognition Fail: LS CD, DVD Check the Cleanness of Media. Change the Media. Check 3pin FFC and Q501. Check Encoder IC Power. Check Enc Assy’s Alignment and Check the OFG Signal. Grease on it. Check P/U Read Power Go to ‘LD CHECK’.
  • Page 83 1. Install GWA-4164B –> PC Power ON –> Execute Windows. 2. Execute Dragon_JW3.exe on Windows (Dragon_JW3.exe & Dragon.cfg should be on same Directory). 3. If you use GWA-4164B, “Dragon(2005/04/08, 14:00)” will be displayed on the window Frame. 4. Select I/F Setup on the menu bar.
  • Page 84 B. Check ALPC Parameters 1. Select About on the menu bar. 2. Click Addition Func. on About window -> New frame will be displayed. 3. Click ALPC Para tab and verify the specification. [ALPC Parameters] 1) CD VRDC : 117~153 2) CD VWDC_NMP : 100~135 3) CD VWDC_MP...
  • Page 85 C. Laser Power Setup 1. Remove disc on the tray. 2. Select ALPC/OPC on the menu bar, and then select Setup Laser Power(Manual) menu. 3. First, select CD and setup wave length of LD Power meter (780nm) (Wave Length : CD(780nm), DVD(660nm), Measure Range : 0.01mW unit). 4.
  • Page 86 [CD Laser Power Setup Result] [HC_CD Laser Power Setup Result] [DVD Laser Power Setup Result]...
  • Page 87 Power Supply System Diagram Drive IC (spindle, sled, load) power 12V_source BD7956FS 5V_source Drive IC (Actuator) BD7956 Reset IC (IC271) BD5233 RF IC (IC121) AN22113A DSP IC (IC201) MN103SA6G Pick-up LPC-812R IC401 3.3V RF IC (IC121) 3.3/1.2V-Reg AN22113A BA3259 DSP IC (IC201) MN103SA6G SDRAM (IC261) M12L16161A...

  • Page 88: Block Diagram

    BLOCK DIAGRAM...
  • Page 89 SRAM ADSC...

This manual is also suitable for:

Gwa-4166bGsa-4166b

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