LG GSA-H20A Service Manual
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LG GSA-H20A Service Manual

Super-multi dvd rewriter
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Super-Multi DVD Rewriter
SERVICE MANUAL
MODEL: GSA-H20A/
P/NO : 3828HS1049E
MODEL : GSA-H20A/GSA-H20N/GSA-H20L
GSA-H20N/
GSA-H20L
may, 2006
Printed in Korea

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  • Page 1 Super-Multi DVD Rewriter SERVICE MANUAL MODEL: GSA-H20A/ GSA-H20N/ GSA-H20L P/NO : 3828HS1049E may, 2006 Printed in Korea MODEL : GSA-H20A/GSA-H20N/GSA-H20L...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ..................................3 FEATURES....................................4 SPECIFICATIONS................................5~12 LOCATION OF CUSTOMER CONTROLS ........................13~14 DISASSEMBLY .................................15~16 1. CABINET and CIRCUIT BOARD DISASSEMBLY ......................15 2. MECHANISM ASSY DISASSEMBLY..........................15 EXPLODED VIEW ................................17~18 MECHANICAL REPLACEMENT PARTS LIST ........................19~20 GLOSSARY .....................................21 THE DIFFERENCES OF CD-R/CD-RW DISCS AND GENERAL CD-ROM..............22~28 1.

  • Page 3: Introduction

    PCs without the need of an Mbytes of digital data into CD-R/RW disc, and can additional interface card. Model name of GSA-H20#/GSA-H21# Series Optioanl Features Model Name VPCS Product Name GSA-H20N GSA-H20L GSA-H20V Super-multi GSA-H20A GSA-H21N GSA-H21L Dual GSA-H21V GSA-H21A...

  • Page 4: Features

    6) Power loading and power eject of a disc. Bare media loading. 7) MTBF : 125,000 POH 8) Vertical and Horizontal installable. 9) Support LightScribe Direct Label Printing Technology(GSA-H20L/GSA-H20A only) 2. Supported disc formats 1) Reads data in each DVD-ROM, DVD-R, DVD-R (Ver.1.0, Ver.2.0 for Authoring), and DVD-RAM (Ver. 2.0 &...

  • Page 5: Specifications

    SPECIFICATIONS I. MODEL : GSA-H20N 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 (1) RecordNow (Sonic) (Not supported in LightScribe) (2) DLA (sonic)
  • Page 6 3. DRIVE PERFORMANCE 3.1 Host interface ............X3T13 ATA/ATAPI5/1321D INF-8090i Rev.5.3 3.2 Read/Write & Rotational speed <Write> DVD-R ..........2x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV) DVD-RW ..........1x, 2x, 4x (CLV), 6x (ZCLV) DVD+R ..........2.4x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV) DVD+RW ..........2.4x, 4x (CLV), 8x (ZCLV) DVD+R DL...........2.4x, 4x (CLV), 6x, 8x (ZCLV) DVD-R DL..........4x (CLV)
  • Page 7 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 Typ. (Note 1) CD-ROM ............120 ms Typ.
  • Page 8 8. Dimensions External dimensions (W x H xD) 146 x 41.3 x 165mm Front bezel (WxHxD) 148 x 42 x 5 mm 9. Mass ..........max 800g * Please Contact the friendly staff of LG Service Care at: Website http: //www.LGEservice.com...
  • Page 9 II. MODEL : GSA-H20A/GSA-H20L 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 (1) RecordNow (Sonic)
  • Page 10 3. DRIVE PERFORMANCE 3.1 Host interface ............X3T13 ATA/ATAPI5/1321D INF-8090i Rev.5.3 3.2 Read/Write & Rotational speed <Write> DVD-R ..........2x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV) DVD-RW ..........1x, 2x, 4x (CLV), 6x (ZCLV) DVD+R ..........2.4x, 4x (CLV), 8x (ZCLV), 12x (PCAV), 16x (CAV) DVD+RW ..........2.4x, 4x (CLV), 8x (ZCLV) DVD+R DL...........2.4x, 4x (CLV), 6x, 8x (ZCLV) DVD-R DL..........4x (CLV)
  • Page 11 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 Typ. (Note 1) CD-ROM ............120 ms Typ.
  • Page 12 4. Sequential read at max speed except loading, unloading and seek 8. Dimensions External dimensions (W x H xD) 146x41.3x165mm Front bezel (WxHxD) 148x42x5 mm 9. Mass ..........Max. 800g * Please Contact the friendly staff of LG Service Care at: Website http: //www.LGEservice.com...

  • Page 13: 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 14 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 15: 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 Disc tray has been opened completely, A. Release 4 screws (A) and remove the Bottom Chassis lift 2 points (a) and remove the Disc tray while in the direction of arrow (1).

  • Page 16: Mechanism Assy Disassembly

    2. MECHANISM ASSY DISASSEMBLY 2-1. Pick-up Unit A. Release screws (B). B. Separate the Pick-up Unit in the direction of arrow (6). Pick-up Unit Mechanism Assy Fig. 2-1 2-2. Pick-up A. Release 1 screw (C) and remove the Pick-up. Pick-up Unit Pick-up Fig.

  • Page 17: Exploded View

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

  • Page 18: 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 19: 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 20: 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 21: 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 22: 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 23: 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 24: 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 25: 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 26: 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 27: 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 28 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 29 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 30: 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 31 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 32: 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 33: 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 34 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 35: 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 36: Hardware Block Diagram Of Lightscribe Label Printing

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

  • Page 37: Md Assy For Lightscribe

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

  • Page 38: 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 39: Dvd & Cd Data Processing

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

  • Page 40: Copy Protection And Regional Code Management Block

    2. Copy Protection and Regional Code Management Block Block Diagram Change the “KEY” HOST DVD PLAYER MN103SB4G (EMPEG2 B/D) Scrmbled MPEG data KEY Magagement 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 41: 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 42: 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 43: Internal Structure Of The Pick

    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 ATR0549 LDD1 W3SET W2SET OUTA W1SET RSET OUTSET...

  • Page 44: 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 45: 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 SODC Servo Block (IC201, MN103SB4G) through (IC121, AN22117A) and controls the pick-up’s up and down to focus on Disc. 2) Tracking Error Signal (DPP Method) ==>...

  • Page 46: Description Of Circuit

    DESCRIPTION OF CIRCUIT 1. ALPC (Automatic Laser Power Control) Circuit 1-1. Block Diagram IC 121 CN 101 AN22117A IC 201 VREFPD Optical MN103SB4G Pick-up S/H2 LPC-812R 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 47: Focus/Tracking/Sled Servo Circuit

    2. Focus/Tracking/Sled Servo Circuit 2-1. Focus, Tracking & Sled Servo Process Focus, Tracking, Sled Servo Pick-up IC121 AN22117A A,B,C,D E,F,G,H Block IC201 Servo Control MN103SB4G A,B,C,D E,F,G,H A,B,C,D Track Error Tracking Focusing Focus Error Detector Detector Actuator IC301 BD7956 LEVEL SHIFT LEVEL SHIFT FDRV PARALLEL...
  • Page 48 2-2. Focus & Tracking Servo Process(using the LightScribe)

  • Page 49: Spindle Circuit

    3. Spindle Servo Circuit 3-1. Spindle Servo Process IC121 AN22117A Pick-up Wobble Signal WBLIN Generator IC201 MN103SB4G 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 50 3-3. Spindle Servo Process(using the LightScribe) MECHANISM MN103SB4G 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 51: Major Ic Internal Block Diagram And Pin Description

    MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION IC121 (AN22117A) : FEP(RF) Analog Signal Processor • Pin Assignment N.C. N.C. N.C. CLUMPGT N.C. LPPS GND2 ASENV/LPPM GND4 VCC52 RSDAT RSEN VCC6 N.C. AN22117A SDAT VCC1 (Top View) CHSEL N.C. 128Pin TQFP GND1 TGCHG SVREF...
  • Page 52 Block Diagram STMD STMDN SE02 CTC2 STMOUT SE01 CTC1 CXDPH1 CXDPH2 TEC Block SPLAOUT SLPOS Block INPUT Input COMP. SLP23 select COMP. SAINL Block SLP14 SBINL CRWAGC LPOS Block CRWCMP SPLBOUT SCINL TECENV CWBLCMP VGA/Bypass SDINL CWBLBUF INPUT & (SE01) Buffer offset DAC CWBLVGA...
  • Page 53 • Pin Assignment Pin no. Pin Name Type Function General CMOS output pin Head Amp/OEIC gain change signal output pin 3. Head Amp/OEIC gain change signal output pin 2. Head Amp/OEIC gain change signal output pin 1. VCC53 Power supply pin for CMOS I/F & LOGIC. PIO0 General CMOS Input/Output pin 0.
  • Page 54 Pin no. Pin Name Type Function PCA peak/bottom detection, APC space detection/ Playback power detection/ Erase detection sample timing signal input pin (pulldown) ROPC space detection, APC space detection/ Playback power detection sample timing signal input pin(pulldown). FEPIDGT/SH6 CAPA through signal input pin/servo sampling signal input pin (pull-down) Sample-and-hold timing signal input pin of wobble S/H at recording (pull-down) VCC4 Power supply pin for internal LOGIC (5.0V)
  • Page 55 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. CLPPPH Capacitor connection pin for LPP peak hold CLPPHPF Capacitor connection pin for LPPHPF RFOUT RF signal output pin. AIDENV/WBLDIF ASENV binary output/Differential signal output pin for ADIP detection CDRF...
  • Page 56 Pin no. Pin Name Type Function CTC1 Capacitor connection pin for TC HPF. CBDOS Capacitor connection pin for BDO detecting circuit LPF. CBDOF Capacitor connection pin for BDO detecting circuit Pick detection. VCC3 Power supply pin for APC/OPC/ASENV (5.0V). VREF25 2.5V reference voltage output pin.
  • Page 57 IC201 (MN103SB4G) : Encoder, Decoder & DSP Singal Processor • Pin Assigment LPPS FDT4 ASENV/LPPM FDT11 RSDAT FDT3 RSEN FDT10 SDAT FDT2 FDT9 FDT1 CHSEL FDT8 AVDD33D2 FDT0 LOUT ROUT AVSSD2 VREFH MN103SB4G AVDD33D1 CPOP1 CPOP2 CPOP3 CPOP4 CPOP5 VDD3 AVSSD1 SE02 SE01...
  • Page 58 • Block Diagram (SODC:MN103SB4G) DVD/CD ATAPI HOST error Formatter correction CIRC DMA bus ANALOG External SDRAM DRAM 16 Mbit (ECC command) Write System Clock 16.9 MHz Generator Internal SERVO data memory Flash debugger On-Chip 32 bit Debugger control 2 Mbytes Resistor bus General- Watchdog...
  • Page 59 • Pin Table Pin Name Connection Description Number Target LPPS LPP space input ASENV ASENV input LPPM LPP mark input RSDAT FEP serial interface data 2(RF) RSEN FEP serial interface enable 2 (RF) SDAT FEP serial interface data FEP serial interface clock FEP serial interface enable CHSEL CAPA polarity switch signal.
  • Page 60 Pin Name Connection Description Number Target Wobble binary signal CLUMPGT RF AGC blas circuit clamp signal TGCHG OEIC Write power switch signal General-purpose I/O. TxD, PWM LSEN LDD serial interface enable LSCK LDD serial interface clock LSDAT LDD serial interface data LDDENA LDD enable signal FEPIDGT...
  • Page 61 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, RxD, PWM PWM2A DRIVER Tracking drive differential PWM+ output, tracking drive BSDA output General-purpose I/O, PWM PWM2B Tracking drive differential PWM-output...
  • Page 62 Pin Name Connection Description Number Target NIOWR HOST ATAPI host write signal NIORD HOST ATAPI host read signal IORDY HOST Ready signal to ATAPI host NDMACK HOST ATAPI host DMA acknowledge signal INTRQ HOST Interrupt request to ATAPI host NIOCS16 HOST ATAPI data bus width select signal General-purpose I/O...
  • Page 63 Pin Name Connection Description Number Target MNCAS SDRAM SDRAM CAS signal MCLK SDRAM SDRAM clock MNRAS SDRAM SDRAM RAS signal MCKE SDRAM SDRAM clock enable signal MBA0 SDRAM SDRAM bank switch 0 General-purpose I/O, Serial CLK, PWM TRCDATA2 SDRAM Debugging trace data EXTRIG1 Trigger MA11...
  • Page 64 Pin Name Connection Description Number Target FDT12 FLASH Flash ROM data FDT5 FLASH Flash ROM data FDT13 FLASH Flash ROM data FDT6 FLASH Flash ROM data FDT14 FLASH Flash ROM data FDT7 FLASH Flash ROM data FDT15 FLASH Flash ROM data VDD3 Power supply Power supply I/O pad V...
  • Page 65 Pin Name Connection Description Number Target NPKMD NPEAK1 modulation signal differential current output PK2MD PEAKk2 modulation signal differential current output NPK2MD NPEAK2 modulation signal differential current output PK3MD PEAK3 modulation signal differential current output NPK3MD NPEAK3 modulation signal differential current output Digital Vpp VDD3 Power supply Power supply...
  • Page 66 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 PGND3 SLO1+ SLO1- SPV 2 SLO2+ SPRNF SLO2- SLGND...
  • Page 67 • 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 68 Input/Output circuit diagram Three-phase motor driver output Spindle driver current detection input Hall bias 2kΩ Ω 12.5k Splindle driver feedback filter pin FG signal output Hall signal input Ω 50kΩ 2.5kΩ Ω 5kΩ Ω 18kΩ 40kΩ PWM driver output SLED1, 2 BTL driver output FO, TK BTL driver output LD 32 33...

  • Page 69: 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 70 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 71 Tray operating is abnormal. Tray open doesn’t work. Is the • input voltage 0V at IC201 Check the connction of IC201 pin 206. • pin206 when push the Replace the EJECT SW. EJECT SW? • Check the connction of IC201 pin 64. Is there Tray •...
  • Page 72 Sled operating is abnormal. Is there Sled control signal output? Replace the IC201. (IC201 pin 66,67) 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 127.
  • Page 73 Spindle operating is abnormal Is there Spindle control DSP output? • Replace the IC201. (IC201 pin68) 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 74 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 pin22*) Replace the IC121. Is FDRV signal output normal in Focusing • Replace the IC201. Up/Down? (IC201 pin 60) * IC121 pin22 is MOUT2(FEP Monitor2).
  • Page 75 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? • ON and Tracking OFF? Replace the PICK UP. (CN101 pin 8, 5, 9, 4) (IC121 pin 21*) Replace the IC121.
  • Page 76 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(Pin83) Replace the Pick-up. RFOUT was about 400mV? Check EQOUTP Replace IC121.
  • Page 77 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 Pin79? Is there RF signal at IC121 Pin88(RFP) Replace the IC121. and Pin87 (RFN)? Check again after the replace Replace the IC201.
  • Page 78 Dust, Scratch, Scratch, change it. Fingerprint...? Is the write Use LG bundle Software Tool(version) supported by (Write Tool & Version) LG Super-Multi Drive? Check disc information on Writng Tool. [If you get some data information with “Non Recordable Disc”...
  • Page 79 No audio output Insert the audio Disc. AUDMUTE : ‘H’? • Check and replace the IC121. (IC121 Pin 126) Audio Play : AUDMUTE ‘H’. • DSP ROUT,LOUT signals output? Check and replace the IC201. (IC201 Pin 10, 11) Do audio Line signals output? (CN271 •...
  • Page 80 LS Media Recognition Fail: LS CD, DVD Check the Cleanness of Media. Change the Media. Check 3 pin In CN501 and Q302. 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 81: How To Use Test Tool

    • How to use Test Tool 1. Dragon A. Start 1. Install GSA-H20L –> PC Power ON –> Execute Windows. 2. Execute Dragon_JW5.exe on Windows (Dragon_JW5.exe & Dragon.cfg should be on same Directory). 3. If you use GSA-H20L, “Dragon(2005/04/08, 14:00)” will be displayed on the window Frame. 4.
  • Page 82 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 83 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 84 [CD Laser Power Setup Result] [HC_CD Laser Power Setup Result] [DVD Laser Power Setup Result]...

  • Page 85: Camus

    2. Camus A. Start 1. Install GSA-H20L -> PC Power On -> Execute Window. 2. Execute Camus.exe on Windows. 3. Click and select GSA-H20L. B. Check ALPC Parameter 1. Check DVD Radio Button and click READ Button. 2. Check CD Radio Button and click READ Button. C.

  • Page 86: Block Diagram

    SPLBOUT SCINL CIRC TECENV VGA/Bypass Pick-up SDINL INPUT & (SE01) Buffer offset DAC Spindle motor SEINL WBL/LPP Block (LPC-812R) SFINL (LG-inotec) SRFMA VGA/ DMA bus Bypass SGINL Bypss Detection SRFMD SHINL SRFMB MPX Block Detection Bypss SRFMC SLP14 SDPDTEP SLP23...

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