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This service manual provides a variety of service
information. It contains the mechanical structure of
the DVD-ROM Drive together with mechanical
adjustments and the electronic circuits in schematic
• Enhanced IDE interface
• Internal 5.25 inch, halfheight DVD-ROM Drive
• 120ms (Typical) Random Access Time (DVD)
• 100ms (Typical) Random Access Time (CD)
• Supports 8X (max) Rotational Modes in DVD Mode
• Supports 40X (max) Rotational Modes in CD Mode
• Max 10,800 kB/sec Sustained Transfer rate in DVD mode
• Max 6,000 kB/sec Sustained Transfer rate in CD mode
• Photo-CD Multisession Disc Spec compliant
• Multimedia MPC-3 Spec compliant
• Power Tray Loading/Ejection Mechanism
• 3-Way Eject Support (Software, Open/Close Button,
Emergency Eject)
1. SUPPORTED SYSTEM
• IBM Compatible Pentium 133MHz or Above (with PIO mode 4, TX chip set recommended)
2. SUPPORTED OS
• MS-DOS (Ver 3.1 or Higher)
• Windows 3.1/95/98/2000
• Windows NT (Ver 4.0)
3. GENERAL PERFORMANCE
• Data Transfer Rate ...........................................................................................Sustained Data Transfer Rate
• Data Buffer Capacity.......................................................................................................................512 kbytes
• Access Time ...................................................................Random Access
4. POWER REQUIREMENTS
• Voltage ........................................................................................................................................+5V DC + 5%
• Ripple .....................................................................................................................................+5V : 100mVp-p
• Current .........................................................................................+12V : 400mA (Average), 0.9A (Maximum)
5. AUDIO PERFORMANCE
• Frequency Response ......................................................................................................20Hz~20KHz( + 3dB)
• S/N Ratio (IHF-A+20kHZ LPF) ..........................................................................88 dB (Typical at 1 KHz 0dB)
• T.H.D. (IHF-A+20kHZ LPF)...............................................................................0.05% (Typical at 1 KHz 0dB)
• Channel Separation (IHF-A+20kHZ LPF) .................................................................................75 dB(Typical)
• Output Voltage (1kHz 0dB) 47KΩ Load ..................................................................................0.8Vrms + 20%
• Headphone Level (1kHz 0dB) 33Ω Load.................................................................................0.8Vrms + 20%
INTRODUCTION
GENERAL FEATURE
SPECIFICATIONS
form. This DVD-ROM Drive was manufactured and
assembled under our strict quality control standards
and meets or exceeds industry specifications and
standards.
• Closed Enclosure
• Built-in ATAPI Interface Controller
• Software Volume Control
• Easy CD-Audio Play front panel Controls
• Front panel Volume Control for Headphone Output
• Built-in MODE-1 ECC/EDC
• MTBF (125,000H) POH (at 10% Utilization)
• PIO Mode 4 & Multiword DMA Mode 2 Support
• ULTRA DMA 33 support
• Horizontal/Vertical Mounting
• Digital audio output connector
• Digital audio through ATAPI Interface
• Spin-down Mode for energy saving
• OS/2 Warp (Ver 3.0)
• Solaris (Ver 2.4 or Higher)
• Linux '96 Slacware (Ver 3.1.0)
DVD (Outer side) : Approx. 10,800 kbytes/sec
DVD (Inner side) : Approx. 4,725 kbytes/sec
CD (Outer side)
: Approx. 6,000 kbytes/sec
CD (Inner side)
: Approx. 2,625 kbytes/sec
+5V : 500mA (Average), 1.2A (Maximum)
DVD : 120ms Typical (8X)
CD : 100ms Typical (40X)
+12V DC + 5%
+12V : 100mVp-p
80 dB (Limit at 1 KHz 0dB)
0.15% (Limit at 1 KHz 0dB)
70 dB(Limit)
3
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Summary of Contents for LG DRD-8080B
- Page 1 INTRODUCTION This service manual provides a variety of service form. This DVD-ROM Drive was manufactured and information. It contains the mechanical structure of assembled under our strict quality control standards the DVD-ROM Drive together with mechanical and meets or exceeds industry specifications and adjustments and the electronic circuits in schematic standards.
- Page 2 LOCATION OF CUSTOMER CONTROLS FRONT VIEW COMPACT COMPACT R O M R O M R O M R O M Headphone Jack Emergency Eject Hole Standard (3.5mm) stereo jack for listening to the Insert a paper clip here to eject the drawer manually or ″...
- Page 3 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 Mecha B. Remove the CD Tray drawing forward, by pushing A. Release 4 screws (A) and remove the Bottom Mecha the Hook(a) backward(5).
- Page 4 2-2. Pick-up Unit A. Remove the skew spring. B. Remove the Pick-up Unit. Skew Spring Pick-up Unit Fig. 1-5 2-3. Feeding Motor Assy A. Remove the Feeding Motor Assy by pushing the 2 hooks(b). B. At this time, be careful the hooks of the Base Pick-up. Feeding Motor Assy Base Pick-up Fig.
- Page 5 INTERNAL STRUCTURE OF THE PICK-UP 1. Structure of the Pick-Up PICK UNIT U001 CN14 DVD PD VCC C002 CN10 DVD PD VC C001 CN15 DVD PD GND CN8 DVD A CN9 DVD B CN11 DVD C CN12 DVD D CN7 DVD RF CN13 DVD E CN5 DVD F CN19 DVD VR...
- Page 6 2. Structure of the Photo Diode (CD) (As seen from light receiving side) 1) Focus Error Signal –> (A + C) - (B+C) • In case of CD Disc This signal is generated in RF AMP IC (IC301 : SSI3723) and controls the pick-up’s up and down to focus on CD Disc.
- Page 7 3. Structure of the Photo Diode (DVD) (As seen from light receiving side) 1) Focus Error Signal –> (A+C) - (B+D) • In case of DVD Disc This signal is generated in RF AMP IC (IC301 : SSI3723) and controls the pick-up’s up and down to focus on DVD Disc.
- Page 8 DESCRIPTION OF CIRCUIT 1. APC (Automatic Power Control) Circuit 1-1. APC Circuit Constitution IC301 SSI3723 PN301 DVD-LD(LASER DIODE) DVD- DVD PD DVD- DVD- R317 C332 Monitor R318 Diode DVD LD C335 Q302 CD-LD(LASER DIODE) CD PD CD-VR Monitor C331 CD LD R315 Diode R316...
- Page 9 2. RF Amplifier Circuit 2-1. RF AMP Constitution IC301 Pick-up Unit SSI3723 PN301 CD (A, B, C) 13 14 BUFF 15 16 DVD (A, B, C, D) To IC701 38 9 10 11 12 Phase Detector To IC701 36 CD (E, F) DVD RF RF AC To IC701 47...
- Page 10 3. Focus/Tracking/Sled Servo Circuit 3-1. FOCUS, TRACKING & SLED SERVO PROCESS FOCUS & TRACKING SERVO PROCESS IC301 RF AMP Pick - Up SSI3723 (A. B. C. E. F) (A. B. C) FOCUS ERROR (A. B. C.D) DETECTOR Generating DVD (A. B. C. D.) DPD TE Generating DPD TE...
- Page 11 3-2. Focus Servo for CD/DVD Focus Servo for CD/DVD is based on focus error signal generated from RF AMP (SSI3723). It standardizes the laser beam (CD : A, B,C, DVD : A, B,C,D) radiated from the pick-up. Each other focus gain or path is made at the SSI3723 (IC301) according to the disc, Focus Error signal output from the FE terminal and input to Servo IC (IC701 CXD3030R).
- Page 12 PLL BLOCK 4-2. Spindle Servo for CD/DVD DRD-8080B consists of the three spindle control respectively. (1) DVD x 8 : CAV (DVD Single, Dual Layer) (2) CD x 16 (max.) : CAV (CD-DA, CD-RW(8-20 x), Video-CD(8x CLV), Host command stand-by of CD- ROM and CD-R) (3) CD x 40 (max.) : CAV (CD-R, CD-ROM play mode)
- Page 13 DESCRIPTION OF DATA PROCESSING 1. CD Data Processing Flow...
- Page 14 2. DVD Data Processing Flow...
- Page 15 3. Copy Protection and Regional Code Management Block Block Diagram Change the "KEY" HOST DVD PLAYER CXD 1867R (MPEG2 B/D) Scrambled MPEG Data H8/3062 KEY Management 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 16 4. 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 17 5. 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 18 MAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION IC301 (SSI3723) : RF Signal Processing for CD/DVD It amplifies or equalize the RF signal from Pick-up, and generate the TE (Tracking Error) and FE (Focus Error) signal for Servo respectively. The TE signal uses the DPD (Differential Phase Detect) method for DVD and 3 Beam method for CD. DVD FE = (A+C) - (B+D) CD FE = F - E Block Diagram...
- Page 19 IC301 (SSI3723) • Pin Description POWER SUPPLY PINS Pin No. Name Type Description – Power supply pin for the RF block and serial port – Power supply pin for the servo block – Ground pin for the RF block and serial port –...
- Page 20 OUTPUT PINS Name Type Description Pin No. 61,62 ATOP/ATON DIFFERENTIAL ATTENUATOR OUTPUTS: Attenuator outputs. 52,53 FNP, FNN DIFFERENTIAL NORMAL OUTPUTS: Filter normal outputs. RFAC(SIGO) SINGLE-ENDED NORMAL OUTPUT: Single-ended RF output. RFDC RF SIGNAL OUTPUT: Single-ended RF summing output reference to VPB-2.4(V). FOCUSING ERROR SIGNAL OUTPUT: Focus error output reference to V125.
- Page 21 SERIAL PORT PINS Pin No. Name Type Description SERIAL DATA ENABLE: Serial enable CMOS input. A high level input SDEN enables the serial port. (not to be left open) SERIAL DATA: Serial data bidirectional CMOS pin(V33). NRZ programming SDATA data for the internal registers is applied to this input. (not to be left open) SERIAL CLOCK: Serial clock CMOS input.
- Page 22 IC201 (H8/3062) : µ-COM It Controls the total system giving or taking the data from the peripheral ICS. • Pin Description H8/3062 DRD-8080B Description pin name pin name VCC1 PB-0 RCLK SP3723 control clock PB-1 LDON APC output On/Off to SP3723...
- Page 23 H8/3062 DRD-8080B Description pin name pin name P1-3 Address bus to CXD1867R P1-4 Address bus to CXD1867R P1-5 Address bus to CXD1867R P1-6 Address bus to CXD1867R P1-7 Address bus to CXD1867R VSS3 P2-0 Address bus to CXD1867R P2-1 CGFS...
- Page 24 H8/3062 DRD-8080B Description pin name pin name P7-4 APEO Absolute phase error signal from CXD1867R P7-5 LOADOUT Tray opened S/W input P7-6 TESTMD MD test signal input P7-7 TRAYIN Tray close output to BA5983 Avss AVSS P8-0 XINT0 Int0 request from CXD1867R...
- Page 25 IC202 (CXD1867R) : LSI processing for DVD-ROM Drive Signal Block Diagram 79, 80, 66~69, 71, 73~75, 96, 97, 99, 111 113 114 115 95 78 91 92 82~87, 89 101, 102, 104~106 RFDCC DMA Controller Asymmetry (Priority resolve & Sequencer) RFIN XHRS XPDI...
- Page 26 Pin No. Name INPUT OUTPUT I/O buffer Comment Current -4mA/4mA 5V tolerant -4mA/4mA 5V tolerant Vss* DGND -4mA/4mA 5V tolerant 5V tolerant 5V tolerant 5V tolerant 5V tolerant 5V tolerant ...
- Page 27 Pin No. Name INPUT OUTPUT I/O buffer Comment Current REDY -4mA/12mA ATAPI Vss* DGND XHAC ATAPI PULL UP HINT -4mA/12mA ATAPI XS16 -4mA/12mA ATAPI ATAPI XPD1 -4mA/12mA ATAPI ATAPI ATAPI Vss* ...
- Page 28 Pin No. Name INPUT OUTPUT I/O buffer Comment Current MDBC -4mA/4mA 5V tolerant MDBD -4mA/4mA 5V tolerant MDBE -4mA/4mA 5V tolerant MDBF -4mA/4mA 5V tolerant -4mA/4mA Vss* DGND APE0 -8mA/8mA VDD* ...
- Page 29 Pin No. Name INPUT OUTPUT I/O buffer Comment Current XRC1 5V tolerant Hystelesis type C2PO 5V tolerant Hystelesis type DBCK -4mA/4mA BCLK 5V tolerant Hystelesis type DDAT -4mA/4mA MDAT -4mA/4mA 5V tolerant Hystelesis type...
- Page 30 IC401 (BA6664FM) : Spindle Motor Drive IC It drives the spindle motor receiving the spindle control signal at IC701 (CXD3030R) in CD & DVD mode. DRIVER Block Diagram GAIN GAIN SWITCH CONTROL CURRENT SENSE AMP HALL AMP TORQUE SENSE AMP SERVO SIGNAL Hall 1...
- Page 31 IC501 (BA5983 FM) 1) It controls the sled movement and takes the tray to open/close in track search mode. 2) It controls the Focus/Tracking Actuator receiving the focus error or tracking error signal from IC701. Standby 10K 10K LEVEL SHIFT LEVEL SHIFT LEVEL...
- Page 32 IC701 (CXD3030R) : DSP Generates Error Signal and return to the Servo by the Signal from RF Amplifier IC. Block Diagram Asymmetry Correction 80 8 9 75 76 74 139 40 DAC BLOCK PWM1P MCKO 8Fs Digital Filter PWM1N V16M PWM2P 1 bit DAC Clock...
- Page 33 IC701 CXD3030R • Pin Description Pin No. Symbol Description AVS6 Analog GND Analog DAC analog output of Sled filter Analog DAC analog output of Tracking filter Analog DAC analog output of Focus filter BSSD Constant current input for DAC analog of servo filter AVD6 Analog power supply (2.5V) VSIO0...
- Page 34 Pin No. Symbol Description Focus Error input Center voltage input VPCO1 1, Z, 0 Output of VCO2 charge pump for vari-pitch EFM PLL VCTL Input of VCO2 control voltage for vari-pitch EFM PLL FILO Output of Filter for master PLL (slave=digital PLL) FILI Input of filter for master PLL 1, Z,0...
- Page 35 Pin No. Symbol Description EXCK Clock input for reading SBS0 SCSY Input of G RSCOR. VCOI Normally “L” Window open input for DAC synchronization. Generally, at “L” window open ASYE Asymmetry circuit ON/OFF XTSL X’tal selection input Digital ON/OFF control. “H” for ON, “L” for OFF. FSTIO 1, 0 Clock input/output for Digital servo (2/3 frequency demultiplication input of XTLI)
- Page 36 Pin No. Symbol Description PCMD48 O 1, 0 D/A interface for 48-bit slot serial data HDBC Normally open BCK48 1, 0 D/A interface for 48-bit slot bit clock VDIO3 Digital power supply (3.8V) HDBB Normally open GTOP 1, 0 GTOP output HDBA Normally open XUGF...
- Page 37 TROUBLESHOOTING GUIDE Reset or Power ON. (Check it after connecting the power cable only no interface cable) Are the pin 44 • Check the power short. and 41 of CN 201 +5V and +12V • Check PC power cable, power Repair PC power supply.
- Page 38 Is the Laser Diode Refer to “Laser Diode is not on.” “ON”? Refer to “Servo part is Does the Focus move abnormal”. up and down? Is the TOC area Refer to “Disc Reading on the disc read? (Does operation is abnormal.” the LED flicker?)
- Page 39 Tray open/close doesn’t work. Does the waveform appear at Check and replace the the IC203 pin 81 when push SW602 or peripheral resistor the SW602 (open/close)? and pattern short. Push period Does the waveform appear at the R524 connected to IC501 pin 26, that is connected Check and replace the R504, to IC501 reversely?
- Page 40 Is the Check the cold soldering for connecting status normal the PN502 and wire between the PN502 connecting status and then and loading motor? replace loading motor. Open/close mode is normal.
- Page 41 Laser Diode is not ON. Does the focusing Refer to “Reset or Power ON”. actuator move up and down? CD PART DVD PART Is the PN301 pin 16 about 2V at the initial power on mode? Does the signal appear at IC301 Pin 21? Does the signal appear at IC301...
- Page 42 Is the PN301 pin 27 about 2V at the initial power on mode? Does the signal appear at IC301 Pin 22? Is the collector of transistor Q301 about Check the cold soldering for the transistor Q301 and then replace Q301. Replace the Pick-up.
- Page 43 Check the CD RF SIGNAL. • Check the cold soldering for the IC301 pin 13, 14, 15, 16. Does the RF out signal • Check the FPC connecting output? status PN 301. (IC301 pin 64 : CD RF) • Check the pick up. Does the RF •...
- Page 44 Check the DVD RF signal. • Check the cold soldering for Does the RF out signal the IC302 pin 1, 2, 3. • Check the FPC connecting output from the pick-up? (IC301 pin 1 : DVD RF) status PN301. • Check the pick up. •...
- Page 45 Disc Rotation is unstable. Does the spindle motor kick signal and Check the cold soldering for the driving signal output from IC701 and then replace IC701. the IC701 pin12(MDP)? <Fig. 1> <Fig.1> Does the spindle driving signal Check the cold soldering for the output from IC402 normally? R421, C409 and IC402 and then (CD: IC402 pin7 <Fig.2>...
- Page 46 Servo part is abnormal. Insert a disc. • Check the Flat cable Does the pick-up slide connecting status PN402. • Check the cold soldering for inner track? the pin 17, 18 of IC501. Refer to “Spindle motor Does the disc rotate? Rotation is failed”.
- Page 47 Check the FAO signal. (IC701 Pin 4 ) Check the circuit between the 1.35V IC401 Pin 3, 4 and the IC701 Pin 4. Check the cold soldering for the IC501(BA5983FM) pin 13, 14. Replace IC501. Check the cold soldering for the Does the square wave IC301 Pin 1, 38, 40, 63 and C301, output at the IC401 Pin 24...
- Page 48 Spindle Motor Rotation is failed. Check the spindle drive signal. (IC401 BA6664 Pin 22) 1.35V 100ms Does the above Check the cold soldering for signal output after the the IC401(BA6664). tray close? Check the MDP signal. Is the disc rotation OK? (IC701 CXD3030 Pin 12) Does the above Replace the IC401(BA6664).
- Page 49 No Audio output. Insert the audio disc. Does the Check the headphone jack and signal output at the cable. headphone jack? Is the pin 4 of IC801 and is the Check the MICOM IC201 pin 24 Pin 2 of IC802 is 5V? and R823.
- Page 50 BLOCK DIAGRAM IC202 LASER DRAM PICK-UP IC201 512kB CXD1867R DVD SERVO/DSP HD-F3 PN201 RF PLL ATAPI Demod. Decode Sync.Det Servo Core IC301 SP3723 A/V Dec. CD-ROM Dec. CD/DVD RF AMP IC701 CXD3030R Authentication CD SERVO/DSP VREF 1.35V IC203 RF PLL CD-Auido H/8/3062 EFM/CIRC...
- Page 51 EXPLODED VIEW PBM00 (MAIN C.B.A)