LG Electronics GSA-4168B, GSA-4165B, GSA-4167B Function of PCA and PMA area, OPC and Ropc

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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.

Method 3 : ROPC is used to determine Laser Power value automatically in data writing.

CD-R Disc can write maximum 99 Tracks but CD-RW Disc can write unlimited tracks because it has a rewritable function.

2)PMA (Program Memory Area)

It has a track information (track No, track Start/End time) of every track before writing completed.

PMA area has the last written point and the next writable point of a disc.

In case of CD to CD copy, some writer may not write PMA area.

* When Disc is Finalized,

PMA information is transferred to the Lead_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, temperature, and humidity.

Laser wavelength is determined by the environmental temperature (775~795nm) and Optical Laser Power is determined by the test and retry.

Asymmetry and optimum writing Power

EFM signal Asymmetry is determined by the writing power.

Therefore, Optical Power which has the same value to the preset power value can be estimated by measuring HF signal Asymmetry on the PCA area.

Measurement of Asymmetry

*Parameter setting (Beta) : Using AC coupled HF signal before equalization Beta = (A1+A2)/(A1-A2)

Signal

A1

 

0

 

HF

 

 

 

 

A2

 

 

Time

P << Po

Time

P = Po

P >> Po

Time

25

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Contents Model GSA-4165B/GSA-4167B/GSA-4168B Super Multi DVD DriveTable of Contents Introduction Support feature and writable disc4165B 4167BGeneral FeaturesSupported disc formats Supported write methodAudio PerformanceOperating System Recording tool SpecificationsApplicable disc formats Writing methodRPC Regional Playback Control Phase2, No Region Data capacityRead/Write & Rotational speed Data transfer rate Access time 1/3 strokePcav CLVDimensions Quality and ReliabilityAcoustic noise Location of Customer Controls Drive activity indicatorDisc tray Emergency Eject Hole Stop/Eject buttonPower Connector Jumper Connector IDE Interface ConnectorAnalog Audio Output Connector Cabinet and Circuit Board Disassembly DisassemblyPick-up Exploded View Glossary Recording Layer Disc SpecificationCD-R and CD-RW Disc ~0.5 umCD-ROM disc Disc MaterialsCD-R disc Pigment Reflective Layer ColorItop Laser Spot Position Time CD-RW DiscWriting Process of CD-R Disc Crystal phaseWriting process of CD-RW Disc AmorphousOrganization of the PCA, PMA and Lead-in Area Layout of CD-ROM discLayout of CD-R/RW disc OPC and Ropc Function of PCA and PMA areaPCA Test Area Lead-In Area Writing Process of DiscPCA C ount Area Lead -out Area Recording Capacity of CD-R/RW 74Minute Recording mediaDifferences of DVD-R/RW, DVD+R/RW discs and DVD-ROM Single Layer Dual LayerDVD-ROM DVD-RW DVD+R DVD+RW Disc structure Recording format using organic dye material DVD-R/DVD+RDVD-R DVD+R Laser beamDVD-RW DVD+RW Recording principlesCrystalline status Amorphous status High reflection coefficient Low reflection coefficient2Tw Writing Pulse Wave Form of DVD+RShall be 0.1mW 2st Method Using Blocked Write StrategyWriting Pulse Wave Form of DVD+RW TtopDTera Layout of DVD-ROM disc Layout of DVD+R discOUT PSN Layout of DVD+RW disc LightScribe Media LightScribe MediaCIrcuit PowerProcessor EncoderOptical Encoder Unit MD Assy For LightScribeCodewheel Optical Encoder AssyGND OFGDVD CD Data ProcessingData Processing Flow Copy Protection and Regional Code Management Block Block Diagram R8J32007KEY Management Control Brief Process Regional Code for DVD DiscAbout Prevention the DVD-ROM from to be copy Case of a disc enhanced movie of 3 titlesIf you want to play the disc prevented from the copy Regional code About the DVD-ROM Regional CodeInternal Structure of the PICK-UP Block Diagram of the PICK-UPHOP-7632TSPick up Pin Assignment Signal Name Signal DescriptionFocus Error Signal == A+C-B+D Signal detection of the P/URF Signal == A+B+C+D +D B+C kF+H E+GPick-up Block DiagramAlpc Automatic Laser Power Control Circuit Focus Servo Focus CircuitTracking & Sled Circuit Block Diagram Tracking FollowingBlock Diagram Seek UnitHOP-7632TS Sled Servo Tracking ServoSpindle Circuit FG CAV ServoOptical Pick-up Disc HOP-7632TS Motor unit Block Diagram Wobble CLV Servo Pin Assignment IC101 R2S35002 RF AMP Analog Signal ProcessorPick Pin Functions Pin Name Pin No TypeFunction Wobsig BlankIP2/MIRR IP1/LPPOUTPin Name Pin No Type Max. voltage Function Pin Layout IC301 R8J32007FPV Encoder, Decoder & DSP Singal ProcessorVinp ADC Pin no Pin Name Pin TableWpll Pin List Pin Name Pin No Destination Function Data PLL/PRML Pin List Pin Name Pin No Destination FunctionServo Pin List Pin Name Pin No Destination Function DA2 Atapi Hrstb AtapiDA1 DA0 5IO AtapiIP2MIRR IP1LPPINWobsig LowzbH8S Micro-Processor Pin List Pin Name Pin No Destination FunctionFlash/SRAM Pin List Pin Name Pin No Destination Function SEL30 Power Supply/GND Pin List Pin Name Pin No Function Package outline 42 PIN Power Ssop 42P9R-K Pin FunctionPin name Function Loading Spgs ACTFLG,FG Actrst Common Input/Output circuit diagramLaser Power Adjust using RD Power/WR Power/Erase Power Troubleshooting GuideHigh Frequency/NRZI skew Adjust Circuit Offset AdjustFocus Amp. and Total Amp. Adjust Tracking Amp. AdjustServo Loop Gain Adjust Focus Offset Adjust for DVD-ROM, CD-R/RW Unwritten Slice Level Adjust for DVD-RAMFocus Offset Adjust for DVD-RAM PID Amp Focus Offset Adjust for DVD-RAM Data Error pulseTilt Adjust for DVD-R/RW, DVD+R/RW, CD-R/RW Tilt Adjust for DVD-RAMFocus Deviation Adjust Focus Offset Adjust for DVD-R/RW, DVD+R/RW, CD-R/RWSpindle Offset Adjust Lens Sensitivity AdjustAdip BPF/Read Timing Adjust for DVD+R/RW Focus Offset Adjust for DVD-R/RW, DVD+R/RWDIDRTZ TimeOut Fail Focus Servo/Tracking Servo FailSlider Spindle SSB Byte8,9 Detail Error Code & Fail Analysis Laser Power Initial AdjustSSB Byte21,22 Adjusting Error during Disc Load Sequence Lead in ErrorDVD-R/RW, +R/RW DVD-ROM,CD-R/RWSSB Byte21,22 SSB Byte21,22 Loading Sequence Error Lead in Error 8586 PCB Poor Analysis Check list XRDDSP Page CS0B Does the power supply circuit operate normally?WCK RCK Is the clock of MPU in DSP oscillated correctly?Motor, Abnormalities in Actuator System Control mode setup by the control terminalIC601R2S30202FP 7ch driver Motor & actuator and its correspondence pinMBM29LV160BE Block DiagramFujitsu DVD/CD DSP

GSA-4167B, GSA-4165B, GSA-4168B specifications

LG Electronics has been a prominent name in the electronics industry, particularly known for its innovative optical storage solutions. Among its noteworthy products are the GSA-4167B, GSA-4165B, and GSA-4168B DVD writers, each showcasing a blend of advanced technology and user-friendly features tailored to meet diverse consumer needs.

The LG GSA-4167B stands out for its versatility and performance. This model supports a wide range of disc formats, including DVD-R, DVD+R, DVD-RW, DVD+RW, and dual-layer DVDs, enhancing its usability for various applications. With a generous writing speed of up to 16x for DVD+R and 8x for dual-layer DVDs, users can create and backup data efficiently. This device is equipped with LG’s Super Multi technology which allows it to read and write multiple formats, making it a perfect choice for users who wish to maximize their media experience without being restricted to a single format.

The GSA-4165B, though slightly older, remains popular due to its reliable performance and ease of use. This model also supports a wide array of formats and achieves impressive speeds comparable to its counterparts. With features such as Buffer Under Run Technology, the GSA-4165B minimizes interruptions during the burning process, reducing the risk of damaging data. Additionally, its sleek design makes it appealing for desktop setups, offering both aesthetics and practicality.

On the other hand, the LG GSA-4168B is known for its advanced capabilities, particularly in terms of burning dual-layer DVDs. Supporting speeds up to 16x for standard DVDs and 4x for dual-layer formats, it combines speed with efficiency. This model incorporates LightScribe technology, enabling users to etch labels directly onto specially coated discs, adding a personal touch to data storage. Its efficient cooling system helps maintain performance during extensive usage, ensuring longevity and reliability.

All three models represent LG's commitment to quality and innovation in optical storage technology. With features such as Power Burn technology and Seamless Link, they provide users peace of mind during high-speed data transfers. Their compatibility with different operating systems further enhances their versatility, making them suitable for both home users and professionals. Overall, the GSA-4167B, GSA-4165B, and GSA-4168B are exemplary models that reflect LG Electronics' dedication to advancing technology and enhancing user experience in the realm of optical drives.