LG Electronics GSA-4168B CS0B, Wck Rck, Does the power supply circuit operate normally?

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2.LED does not blink at all at the time of a power supply injection. Eject-SW does not react.

(1) Is it normal to the exterior Bus (Data-Bus, Address-Bus, control signal system) of MPU? Viewing — check: -- a short circuit, opening, etc.

•The device connected to the exterior Bus of MPU in DSP, and its signal list

Peripheral device

Flash -ROM

[Bus/Signal]

(IC302)

 

 

Address

A1~A20

 

 

Data

D0~D15

 

 

CS*

CS0B

 

 

WCK

WR

 

 

RCK

RD

 

 

=> It repairs, when abnormalities are discovered.

(2) Does the power supply circuit operate normally?

External input 12V, external input 5V, regulator 3.3V, regulator 2.8V, and regulator 1.5V

=>When the abnormalities are discovered, an external power supply, a power supply cable, and Regulator IC are exchanged.

=> Since a problem is in a load side when not improving, even if it exchanges the above, and attached sheet JR6 power-supply system figure is made reference, and poor portions, such as a short circuit of a power supply part, are found out and fixed.

(3) Is the clock of MPU in DSP oscillated correctly?

Checked the ceramic oscillation element’s X301 both-ends and DSP(106)(107) 33.87MHz oscillating.

=> When 3.3V power supply is correctly supplied to DSP and the clock is not oscillating correctly, it is the defect of MPU, or an oscillation element defect, and part exchange is performed in order of DSP and X301.

(4) The defect of Flash-ROM

Although the clock of DSP is oscillating correctly and the power supply circuit is also outputting normal voltage, when LED does not blink at all at the time of a power supply injection and Eject-SW does not react, either, poor Flash-ROM is the most doubtful.

=> Flash-ROM (IC302) are exchanged.

Note: Before Flash-ROM exchange, the CS signals of the external device of MPU in DSP connection, an Address signal, and a Data signal are observed on a waveform level, and since the but most amount of work and the special knowledge which can raise the discovery accuracy of a poor part are necessities, recommendation is impossible.

(5)Even if it performs the above-mentioned repair, when not improving, the disconnection and the short circuit which cannot be discovered, can be considered in viewing of PCB. Moreover, partial breakage (although a clock is oscillated, somewhere in insides do not operate.) of DSP can be considered.

=> When not improving above, the possibility that a PCB pattern is faulty is high, and judges repair to be difficult.

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Contents Super Multi DVD Drive Model GSA-4165B/GSA-4167B/GSA-4168BTable of Contents Support feature and writable disc Introduction4165B 4167BFeatures GeneralSupported disc formats Supported write methodPerformance AudioSpecifications Operating System Recording toolApplicable disc formats Writing methodRPC Regional Playback Control Phase2, No Region Data capacityRead/Write & Rotational speed Access time 1/3 stroke Data transfer ratePcav CLVDimensions Quality and ReliabilityAcoustic noise Drive activity indicator Location of Customer ControlsDisc tray Emergency Eject Hole Stop/Eject buttonPower Connector Jumper Connector IDE Interface ConnectorAnalog Audio Output Connector Disassembly Cabinet and Circuit Board DisassemblyPick-up Exploded View Glossary Disc Specification Recording LayerCD-R and CD-RW Disc ~0.5 umDisc Materials CD-ROM discCD-R disc Pigment Reflective Layer ColorCD-RW Disc Itop Laser Spot Position TimeCrystal phase Writing Process of CD-R DiscWriting process of CD-RW Disc AmorphousOrganization of the PCA, PMA and Lead-in Area Layout of CD-ROM discLayout of CD-R/RW disc Function of PCA and PMA area OPC and RopcWriting Process of Disc PCA Test Area Lead-In AreaPCA 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 Recording format using organic dye material DVD-R/DVD+R Disc structureDVD-R DVD+R Laser beamRecording principles DVD-RW DVD+RWCrystalline status Amorphous status High reflection coefficient Low reflection coefficientWriting Pulse Wave Form of DVD+R 2Tw2st Method Using Blocked Write Strategy Shall be 0.1mWWriting 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 MediaPower CIrcuitProcessor EncoderMD Assy For LightScribe Optical Encoder UnitOptical Encoder Assy CodewheelGND OFGDVD CD Data ProcessingData Processing Flow Block Diagram R8J32007 Copy Protection and Regional Code Management BlockKEY 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 About the DVD-ROM Regional Code Regional codeBlock Diagram of the PICK-UPHOP-7632TS Internal Structure of the PICK-UPSignal Name Signal Description Pick up Pin AssignmentSignal detection of the P/U Focus Error Signal == A+C-B+DRF Signal == A+B+C+D +D B+C kF+H E+GBlock Diagram Pick-upAlpc Automatic Laser Power Control Circuit Focus Circuit Focus ServoBlock Diagram Tracking Following Tracking & Sled CircuitBlock Diagram Seek UnitHOP-7632TS Tracking Servo Sled ServoSpindle Circuit FG CAV ServoOptical Pick-up Disc HOP-7632TS Motor unit Block Diagram Wobble CLV Servo IC101 R2S35002 RF AMP Analog Signal Processor Pin AssignmentPick Pin Functions Pin Name Pin No TypeFunction Blank WobsigIP2/MIRR IP1/LPPOUTPin Name Pin No Type Max. voltage Function IC301 R8J32007FPV Encoder, Decoder & DSP Singal Processor Pin LayoutVinp ADC Pin Table Pin no Pin NameData PLL/PRML Pin List Pin Name Pin No Destination Function Wpll Pin List Pin Name Pin No Destination FunctionServo Pin List Pin Name Pin No Destination Function Hrstb Atapi DA2 AtapiDA1 DA0 5IO AtapiIP1LPPIN IP2MIRRWobsig 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 Input/Output circuit diagram Spgs ACTFLG,FG Actrst CommonTroubleshooting Guide Laser Power Adjust using RD Power/WR Power/Erase PowerHigh Frequency/NRZI skew Adjust Circuit Offset AdjustFocus Amp. and Total Amp. Adjust Tracking Amp. AdjustServo Loop Gain Adjust Unwritten Slice Level Adjust for DVD-RAM Focus Offset Adjust for DVD-ROM, CD-R/RWFocus Offset Adjust for DVD-RAM PID Amp Focus Offset Adjust for DVD-RAM Data Error pulseTilt Adjust for DVD-RAM Tilt Adjust for DVD-R/RW, DVD+R/RW, CD-R/RWFocus Deviation Adjust Focus Offset Adjust for DVD-R/RW, DVD+R/RW, CD-R/RWLens Sensitivity Adjust Spindle Offset 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 Detail Error Code & Fail Analysis Laser Power Initial Adjust SSB Byte8,9Adjusting Error during Disc Load Sequence Lead in Error SSB Byte21,22DVD-ROM,CD-R/RW DVD-R/RW, +R/RWSSB Byte21,22 SSB Byte21,22 Loading Sequence Error Lead in Error 8586 PCB Poor Analysis Check list XRDDSP Page Does the power supply circuit operate normally? CS0BWCK RCK Is the clock of MPU in DSP oscillated correctly?Control mode setup by the control terminal Motor, Abnormalities in Actuator SystemIC601R2S30202FP 7ch driver Motor & actuator and its correspondence pinBlock Diagram MBM29LV160BEFujitsu 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.
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