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LG Electronics GSA-4168B Disc Specification, Disc Materials, Dvd-Rom, Single Layer, Dual Layer

Models: GSA-4167B GSA-4165B GSA-4168B

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2. Disc Specification

	DVD-ROM		DVD-R	DVD-RW	DVD+R	DVD+RW

	Single-Layer	Dual-Layer
	Single-Layer	Dual-Layer

Media Type	Read Only	Read Only	Dye	Phase change	Dye	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

Track pitch	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%

3. Disc Materials

1) DVD-ROM

<Single Layer >

Label

Polycarbonate

Bonding layer

Reflective layer

Polycarbonate

<Dual Layer >

Label

Polycarbonate

Reflective layer

Bonding layer

Semi-reflective

Polycarbonate

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LG Electronics GSA-4168B, GSA-4165B, GSA-4167B Disc Specification, Disc Materials, Dvd-Rom, Single Layer, Dual Layer

Contents

P/NO 3828HS1047G August Printed in Korea SERVICE MANUALSuper Multi DVD Drive MODEL GSA-4165B GSA-4167B GSA-4168BTABLE OF CONTENTS CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAMINTRODUCTION 1. Support feature and writable discFEATURES 1 General2. Supported disc formats 3. Supported write method4. Performance 5. Audio1x CD = 150 kB/s SPECIFICATIONS Operating SystemRecording tool 2.1 Applicable disc formats2.5 RPC Regional Playback Control Phase2, No Region 3. DRIVE PERFORMANCE2.4 Data capacity 3.2 Read/Write & Rotational speed3.4 Access time 1/3 stroke 3.3 Data transfer rate2.77, 5.54 Mbytes/s 5. POWER REQUIREMENTS 8. Dimensions4. Quality and Reliability 6. AUDIO PERFORMANCELOCATION OF CUSTOMER CONTROLS Front Pane lDrive Activity Indicators Drive activity indicatorRear Pane l Analog Audio Output ConnectorIDE Interface Connector Jumper Connector Digital Audio Output ConnectorDISASSEMBLY 1. CABINET and CIRCUIT BOARD DISASSEMBLY2. MECHANISM ASSY DISASSEMBLY Emergency Eject Hole2-2. Pick-up EXPLODED VIEW PBM00 MAIN C.B.APBF00 FRONT C.B.A LightScribe onlyGLOSSARY Logical EraseMulti session 2. Disc Specification The differences of CD-R/CD-RW discs and General CD-ROM1. Recording Layer a=30nm3. Disc Materials 1 CD-ROM disc2 CD-R disc PigmentFocusing 4. Reading process of Optical DiscLens Groove5. Writing Process of CD-R Disc 6. Writing process of CD-RW DiscAmorphous 7. Organization of the PCA, PMA and Lead-in Area 1 Layout of CD-ROM disc2 Layout of CD-R/RW disc 1 PCA Power Calibration Area 1 OPC Optimum Power Control8. Function of PCA and PMA area 9. OPC and ROPC10. Writing Process of DISC The differences of DVD-R/RW, DVD+R/RW discs and DVD-ROM 0.4 umDVD-R/RW Disc LPP Land Pre-Pit DVD+R/RW Disc 1. Recording Layer2. Disc Specification 3. Disc Materials1 DVD-ROM Single Layer2 Recording format using organic dye material DVD-R/DVD+R Disc structureDisc structure Disc structure Recording principlesData erased state 4. Writing Pulse Wave Form of DVD+R NRZIN = 3 only the top pulseTtop , first pulse lead-time dT top , dTle NRZI2 2st Method Using Blocked Write Strategy 5. Writing Pulse Wave Form of DVD+RW NRZIChannel bits TtopDisc Center Diameter 120 mm1 Layout of DVD-ROM disc 2 Layout of DVD+R disc3 Layout of DVD+RW disc Disc CenterDiameter 120 mm DiscOD Label Zone Control Feature Zone Clamping/Logo Zone Center Hole LightScribe Media1. LightScribe Media Screen Printed Imaging Layer Clear Protective Coating2. Hardware Block Diagram Label PrintingLaser Power Reference Write Strategy Control SERVO Signals3. MD Assy For LightScribe Optical Encoder UnitOPU ID Movement Range L=21um Schematic of Enc PCB 4. Optical Encoder AssyEncoder PCB Optical Encoder IC FFC 3PINCD DATA PROCESSING Data Processing FlowP-up Unit HOP-7632TS 2. Copy Protection and Regional Code Management Block Block DiagramR8J32007 HOST DVD PLAYER EMPEG2 B/D3. About Prevention the DVD-ROM from to be copy In case of a disc enhanced movie of 3 titlesIf you want to play the disc prevented from the copy 4. About the DVD-ROM Regional Code Regional codeExample The disc manufactured in the U.S.A, has the number one 1. Block Diagram of the PICK-UPHOP-7632TS INTERNAL STRUCTURE OF THE PICK-UP2. Pick up Pin Assignment Signal NameSignal Description 3. Signal detection of the P/U Track CenterTp/2 MainCIRCUITDESCRIPTION OF 1. ALPC Automatic Laser Power Control Circuit IC301 R8J32007CN101 IC101 R2S350021-2. ALPC Automatic Laser Power Control Circuit 2. Focus Circuit IC101R2S35002 Disc3. Tracking & Sled Circuit IC101R2S35002 DiscIC101 R2S35002Disc Optical3-2-1. Tracking Servo 3-2-2. Sled Servo4. Spindle Circuit 4-1-1. Block DiagramFGCAV ServoOptical Pick-up4-2-1. Block Diagram Wobble CLV Servo 4-2-2. Wobble CLV Servo CD-R 4x, 8x, 16x, 24x, 32xCD-RW 4x, 10x, 16x, 24x DVD-R 2x, 4x, 8x, 16xPCAV DVD-R DL 2x DVD-RW 1x, 2x, 4x DVD+R 2.4x, 4x, 8x, 12x, 16xPCAVIC101 R2S35002 RF AMP Analog Signal Processor MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTIONR2S35002 TOP VIEWPick BALANCEPin Functions pin Namepin No TypeEqualizer fc auto-adjustment control clock input terminal pin Namepin No Typepin Name pin NoType max. voltageIC301 R8J32007FPV Encoder, Decoder & DSP Singal Processor Top ViewR8J32007 1.2 Block Diagram DemodulateDescramble 1.3 Pin Table Pin noPin Name Pin noData PLL/PRML Pin List Pin NamePin No destinationServo Pin List Pin NamePin No destinationATAPI Interface Pin List Pin NamePin No destinationEncoder Interface Pin List Pin NamePin No destinationAudio Interface Pin List Pin NamePin No destinationLSI/TEST Control Pin List Pin NamePin No destinationPower Supply/GND Pin List Pin NamePin No FunctionIC601 R2S30202FP SPINDLE MOTOR AND 6CH ACTUATOR DRIVER Package outline 42 PIN POWER SSOP 42P9R-KR2S3 0202FP Page Input/Output circuit diagram TROUBLESHOOTING GUIDE 01 Laser Power Adjust using RD Power/WR Power/Erase Power02 High Frequency/NRZI skew Adjust 03 Data Slice/Equalizer Boost/Raw Slice/ Equalizer Frequency Adjust06 Focus Amp. and Total Amp. Adjust 07 Tracking Amp. Adjust08 Servo Loop Gain Adjust 09 Unwritten Slice Level Adjust for DVD-RAM 10 Focus Offset Adjust for DVD-ROM, CD-R/RW11 Focus Offset Adjust for DVD-RAM PID Amp 12 Focus Offset Adjust for DVD-RAM Data Error pulse13 Tilt Adjust for DVD-RAM 14 Tilt Adjust for DVD-R/RW, DVD+R/RW, CD-R/RW15 Focus Deviation Adjust 16 Focus Offset Adjust for DVD-R/RW, DVD+R/RW, CD-R/RW17 Lens Sensitivity Adjust 18 Spindle Offset Adjust19 ADIP BPF/Read Timing Adjust for DVD+R/RW 20 Focus Offset Adjust for DVD-R/RW, DVD+R/RWDID21 RTZ TimeOut Fail 22 Focus Servo/Tracking Servo FailAll Disc Slider#6,8-10Detail Error Code & Fail Analysis 1. Laser Power Initial Adjust SSB Byte8,92. Adjusting Error during Disc Load Sequence Lead in Error SSB Byte21,22SSB Byte21,22 SSB Byte21,22 SSB Byte21,22 3. Loading Sequence Error Lead in Error SSB Byte21,22JR6 Power Supply System Diagram 5V in SW702SW701 IC701PCB Poor Analysis - Check list HW Self- Diagnostic function 1. Self-Diagnostic Function by LED Blink 2 Does the power supply circuit operate normally? 3 Is the clock of MPU in DSP oscillated correctly?4 The defect of Flash-ROM A control mode setup by the control terminal 3. Motor, Abnormalities in Actuator System1 IC601R2S30202FP 7ch driver A motor & actuator and its correspondence pinBLOCK DIAGRAM Host IDE12V GND 5V OPUHOP-7632TS HITACHI ME