Manuals / LG Electronics / TV and Video / DVD Player

LG Electronics GSA-4165B, GSA-4168B, GSA-4167B service manual Pick-up

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

1 86

Download 86 pages 50.88 Kb

Page 13

Image 13

2-2. Pick-up

A. Release 1 screw (C) and remove the Pick-up.

Pick-up Unit

(C)

Pick-up

Fig. 2-2

Page 13

Image 13

LG Electronics GSA-4165B, GSA-4168B, GSA-4167B service manual Pick-up

Contents

SERVICE MANUAL P/NO 3828HS1047G August Printed in KoreaSuper Multi DVD Drive MODEL GSA-4165B GSA-4167B GSA-4168BCAUTION - INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAM TABLE OF CONTENTS1. Support feature and writable disc INTRODUCTION1 General FEATURES2. Supported disc formats 3. Supported write method5. Audio 4. Performance1x CD = 150 kB/s Operating System SPECIFICATIONSRecording tool 2.1 Applicable disc formats3. DRIVE PERFORMANCE 2.5 RPC Regional Playback Control Phase2, No Region2.4 Data capacity 3.2 Read/Write & Rotational speed3.3 Data transfer rate 3.4 Access time 1/3 stroke2.77, 5.54 Mbytes/s 8. Dimensions 5. POWER REQUIREMENTS4. Quality and Reliability 6. AUDIO PERFORMANCEFront Pane l LOCATION OF CUSTOMER CONTROLSDrive Activity Indicators Drive activity indicatorAnalog Audio Output Connector Rear Pane lIDE Interface Connector Jumper Connector Digital Audio Output Connector1. CABINET and CIRCUIT BOARD DISASSEMBLY DISASSEMBLY2. MECHANISM ASSY DISASSEMBLY Emergency Eject Hole2-2. Pick-up PBM00 MAIN C.B.A EXPLODED VIEWPBF00 FRONT C.B.A LightScribe onlyLogical Erase GLOSSARYMulti session The differences of CD-R/CD-RW discs and General CD-ROM 2. Disc Specification1. Recording Layer a=30nm1 CD-ROM disc 3. Disc Materials2 CD-R disc Pigment4. Reading process of Optical Disc FocusingLens Groove6. Writing process of CD-RW Disc 5. Writing Process of CD-R DiscAmorphous 1 Layout of CD-ROM disc 7. Organization of the PCA, PMA and Lead-in Area2 Layout of CD-R/RW disc 1 OPC Optimum Power Control 1 PCA Power Calibration Area8. Function of PCA and PMA area 9. OPC and ROPC10. Writing Process of DISC 0.4 um The differences of DVD-R/RW, DVD+R/RW discs and DVD-ROMDVD-R/RW Disc LPP Land Pre-Pit DVD+R/RW Disc 1. Recording Layer3. Disc Materials 2. Disc Specification1 DVD-ROM Single LayerDisc structure 2 Recording format using organic dye material DVD-R/DVD+RDisc structure Recording principles Disc structureData erased state NRZI 4. Writing Pulse Wave Form of DVD+RN = 3 only the top pulseTtop , first pulse lead-time dT top , dTle NRZI2 2st Method Using Blocked Write Strategy NRZI 5. Writing Pulse Wave Form of DVD+RWChannel bits TtopDiameter 120 mm Disc Center1 Layout of DVD-ROM disc 2 Layout of DVD+R discDisc Center 3 Layout of DVD+RW discDiameter 120 mm LightScribe Media DiscOD Label Zone Control Feature Zone Clamping/Logo Zone Center Hole1. LightScribe Media Screen Printed Imaging Layer Clear Protective CoatingLabel Printing 2. Hardware Block DiagramLaser Power Reference Write Strategy Control SERVO SignalsOptical Encoder Unit 3. MD Assy For LightScribeOPU ID Movement Range L=21um 4. Optical Encoder Assy Schematic of Enc PCBEncoder PCB Optical Encoder IC FFC 3PINData Processing Flow CD DATA PROCESSINGP-up Unit HOP-7632TS Block Diagram 2. Copy Protection and Regional Code Management BlockR8J32007 HOST DVD PLAYER EMPEG2 B/DIn case of a disc enhanced movie of 3 titles 3. About Prevention the DVD-ROM from to be copyIf you want to play the disc prevented from the copy Regional code 4. About the DVD-ROM Regional CodeExample The disc manufactured in the U.S.A, has the number one INTERNAL STRUCTURE OF THE PICK-UP 1. Block Diagram of the PICK-UPHOP-7632TSSignal Name 2. Pick up Pin AssignmentSignal Description Track Center 3. Signal detection of the P/UTp/2 MainIC301 R8J32007 CIRCUITDESCRIPTION OF 1. ALPC Automatic Laser Power Control CircuitCN101 IC101 R2S350021-2. ALPC Automatic Laser Power Control Circuit IC101 2. Focus CircuitR2S35002 DiscIC101 3. Tracking & Sled CircuitR2S35002 DiscR2S35002 IC101Disc Optical3-2-2. Sled Servo 3-2-1. Tracking Servo4-1-1. Block DiagramFGCAV Servo 4. Spindle CircuitOptical Pick-up4-2-2. Wobble CLV Servo CD-R 4x, 8x, 16x, 24x, 32x 4-2-1. Block Diagram Wobble CLV ServoCD-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, 16xPCAVMAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION IC101 R2S35002 RF AMP Analog Signal ProcessorR2S35002 TOP VIEWBALANCE Pickpin Name Pin Functionspin No Typepin Name Equalizer fc auto-adjustment control clock input terminalpin No Typepin No pin NameType max. voltageTop View IC301 R8J32007FPV Encoder, Decoder & DSP Singal ProcessorR8J32007 Demodulate 1.2 Block DiagramDescramble Pin no 1.3 Pin TablePin Name Pin noPin Name Data PLL/PRML Pin ListPin No destinationPin Name Servo Pin ListPin No destinationPin Name ATAPI Interface Pin ListPin No destinationPin Name Encoder Interface Pin ListPin No destinationPin Name Audio Interface Pin ListPin No destinationPin Name LSI/TEST Control Pin ListPin No destinationPin Name Power Supply/GND Pin ListPin No FunctionPackage outline 42 PIN POWER SSOP 42P9R-K IC601 R2S30202FP SPINDLE MOTOR AND 6CH ACTUATOR DRIVERR2S3 0202FP Page Input/Output circuit diagram 01 Laser Power Adjust using RD Power/WR Power/Erase Power TROUBLESHOOTING GUIDE02 High Frequency/NRZI skew Adjust 03 Data Slice/Equalizer Boost/Raw Slice/ Equalizer Frequency Adjust07 Tracking Amp. Adjust 06 Focus Amp. and Total Amp. Adjust08 Servo Loop Gain Adjust 10 Focus Offset Adjust for DVD-ROM, CD-R/RW 09 Unwritten Slice Level Adjust for DVD-RAM11 Focus Offset Adjust for DVD-RAM PID Amp 12 Focus Offset Adjust for DVD-RAM Data Error pulse14 Tilt Adjust for DVD-R/RW, DVD+R/RW, CD-R/RW 13 Tilt Adjust for DVD-RAM15 Focus Deviation Adjust 16 Focus Offset Adjust for DVD-R/RW, DVD+R/RW, CD-R/RW18 Spindle Offset Adjust 17 Lens Sensitivity Adjust19 ADIP BPF/Read Timing Adjust for DVD+R/RW 20 Focus Offset Adjust for DVD-R/RW, DVD+R/RWDID22 Focus Servo/Tracking Servo Fail 21 RTZ TimeOut FailAll Disc Slider#6,8-10SSB Byte8,9 Detail Error Code & Fail Analysis 1. Laser Power Initial AdjustSSB Byte21,22 2. Adjusting Error during Disc Load Sequence Lead in ErrorSSB Byte21,22 SSB Byte21,22 SSB Byte21,22 SSB Byte21,22 3. Loading Sequence Error Lead in Error5V in SW702 JR6 Power Supply System DiagramSW701 IC701PCB Poor Analysis - Check list HW Self- Diagnostic function 1. Self-Diagnostic Function by LED Blink 3 Is the clock of MPU in DSP oscillated correctly? 2 Does the power supply circuit operate normally?4 The defect of Flash-ROM 3. Motor, Abnormalities in Actuator System A control mode setup by the control terminal1 IC601R2S30202FP 7ch driver A motor & actuator and its correspondence pinHost IDE BLOCK DIAGRAM12V GND 5V OPUHOP-7632TS HITACHI ME