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LG Electronics GSA-4167B, GSA-4168B, GSA-4165B service manual Block Diagram Wobble CLV Servo

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

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4-2-1. Block Diagram (Wobble CLV Servo)

4-2-1. Block Diagram (Wobble CLV Servo)

						C116	C117	C118
						WAG1	WAG2	WAG3
						18	19	20
			SA
			87		ADO
			SB	S	HPF	AGC1		-
			88	S	HPF	AGC1		-
			SC	/				HPF
			SC	H				+
Disc			89	H	HPF		AGC2	+
			SD		HPF		AGC2
			SD		BCO
Motor unit	Optical		90		BCO
Motor unit	Optical		MA
	Pick-up	C171	92
HOP-7632TS		C171	MB			BPF	HPF	AGC3
						BPF	HPF	AGC3
			93
		C172	93
		C172
			MC						WOBSIG
			94				HPF	+	WOBSIG
		C173	94				HPF	+	37
		C173	MD
								-
						VREF
		C174	95			VREF
		C174
	GND
		WBLSH			IC101
	WBLSH		31		R2S35002
1.65V		IC301
		R8J32007							154
	R375								154
SPD	SPD	P		M					SP
	211	P		M					SP
	211	W		U
C349	R349	M		X
C349									PH
					Motor Kick				PH
					Motor Kick
1.65V					REG
1.65V

4-2-2. Wobble CLV Servo

CD-R : 4x, 8x, 16x, 24x, 32x, 40x, 48x

/CD-RW : 4x, 10x, 16x, 24x, 32x

/DVD-R : 2x, 4x, 8x, 16x(PCAV)

/DVD-R DL : 2x, 4x

/DVD-RW : 1x, 2x, 4x, 6x

/DVD+R : 2.4x, 4x, 8x, 12x, 16x(PCAV)

/DVD+R DL : 2.4x, 4x, 6x

/DVD-RAM : 2x, 3x, 3-5x(PCAV)

/DVD+RW : 2.4x, 4x, 8x

When drive write DVD-RAM/R/RW/+R/+RW/CD-R/CD-RW, the spindle motor is controlled using Wobble CLV Spindle Servo.

The WOBSIG signal(R2S35002 37pin) input to DSP IC(R8J32007 154pin). The DSP Controller in R8J32007 uses WOBSIG as linear velocity feed back, therefore the Wobble CLV Spindle Servo doesn’t work well when WOBSIG signal is abnormal.

The spindle controller PWM output signal SPD (R8J32007 211pin) input to SPIN in Drive IC(R2S30202FP 1pin) after Low-Pass Filtering.

The PWM output signal U,V, W signal(R2S30202FP 12, 13, 14pin) drives Spindle Motor without using a sensor.

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LG Electronics GSA-4167B, GSA-4168B, GSA-4165B Block Diagram Wobble CLV Servo, Wobble CLV Servo CD-R 4x, 8x, 16x, 24x, 32x

Contents

Super Multi DVD Drive P/NO 3828HS1047G August Printed in KoreaSERVICE MANUAL MODEL GSA-4165B GSA-4167B GSA-4168BTABLE OF CONTENTS CAUTION - INVISIBLE LASER RADIATION WHEN OPEN AVOID EXPOSURE TO BEAMINTRODUCTION 1. Support feature and writable disc2. Supported disc formats FEATURES1 General 3. Supported write method1x CD = 150 kB/s 4. Performance5. Audio Recording tool SPECIFICATIONSOperating System 2.1 Applicable disc formats2.4 Data capacity 2.5 RPC Regional Playback Control Phase2, No Region3. DRIVE PERFORMANCE 3.2 Read/Write & Rotational speed2.77, 5.54 Mbytes/s 3.4 Access time 1/3 stroke3.3 Data transfer rate 4. Quality and Reliability 5. POWER REQUIREMENTS8. Dimensions 6. AUDIO PERFORMANCEDrive Activity Indicators LOCATION OF CUSTOMER CONTROLSFront Pane l Drive activity indicatorIDE Interface Connector Rear Pane lAnalog Audio Output Connector Jumper Connector Digital Audio Output Connector2. MECHANISM ASSY DISASSEMBLY DISASSEMBLY1. CABINET and CIRCUIT BOARD DISASSEMBLY Emergency Eject Hole2-2. Pick-up PBF00 FRONT C.B.A EXPLODED VIEWPBM00 MAIN C.B.A LightScribe onlyMulti session GLOSSARYLogical Erase 1. Recording Layer 2. Disc SpecificationThe differences of CD-R/CD-RW discs and General CD-ROM a=30nm2 CD-R disc 3. Disc Materials1 CD-ROM disc PigmentLens Focusing4. Reading process of Optical Disc GrooveAmorphous 5. Writing Process of CD-R Disc6. Writing process of CD-RW Disc 2 Layout of CD-R/RW disc 7. Organization of the PCA, PMA and Lead-in Area1 Layout of CD-ROM disc 8. Function of PCA and PMA area 1 PCA Power Calibration Area1 OPC Optimum Power Control 9. OPC and ROPC10. Writing Process of DISC DVD-R/RW Disc LPP Land Pre-Pit DVD+R/RW Disc The differences of DVD-R/RW, DVD+R/RW discs and DVD-ROM0.4 um 1. Recording Layer1 DVD-ROM 2. Disc Specification3. Disc Materials Single LayerDisc structure 2 Recording format using organic dye material DVD-R/DVD+RDisc structure Data erased state Disc structureRecording principles N = 3 only the top pulseTtop , first pulse lead-time dT top , dTle 4. Writing Pulse Wave Form of DVD+RNRZI NRZI2 2st Method Using Blocked Write Strategy Channel bits 5. Writing Pulse Wave Form of DVD+RWNRZI Ttop1 Layout of DVD-ROM disc Disc CenterDiameter 120 mm 2 Layout of DVD+R discDiameter 120 mm 3 Layout of DVD+RW discDisc Center 1. LightScribe Media DiscOD Label Zone Control Feature Zone Clamping/Logo Zone Center HoleLightScribe Media Screen Printed Imaging Layer Clear Protective CoatingLaser Power Reference Write Strategy Control 2. Hardware Block DiagramLabel Printing SERVO SignalsOPU ID Movement Range L=21um 3. MD Assy For LightScribeOptical Encoder Unit Encoder PCB Optical Encoder IC Schematic of Enc PCB4. Optical Encoder Assy FFC 3PINP-up Unit HOP-7632TS CD DATA PROCESSINGData Processing Flow R8J32007 2. Copy Protection and Regional Code Management BlockBlock Diagram HOST DVD PLAYER EMPEG2 B/DIf you want to play the disc prevented from the copy 3. About Prevention the DVD-ROM from to be copyIn case of a disc enhanced movie of 3 titles Example The disc manufactured in the U.S.A, has the number one 4. About the DVD-ROM Regional CodeRegional code 1. Block Diagram of the PICK-UPHOP-7632TS INTERNAL STRUCTURE OF THE PICK-UPSignal Description 2. Pick up Pin AssignmentSignal Name Tp/2 3. Signal detection of the P/UTrack Center MainCN101 CIRCUITDESCRIPTION OF 1. ALPC Automatic Laser Power Control CircuitIC301 R8J32007 IC101 R2S350021-2. ALPC Automatic Laser Power Control Circuit R2S35002 2. Focus CircuitIC101 DiscR2S35002 3. Tracking & Sled CircuitIC101 DiscDisc IC101R2S35002 Optical3-2-1. Tracking Servo 3-2-2. Sled ServoOptical 4. Spindle Circuit4-1-1. Block DiagramFGCAV Servo Pick-upCD-RW 4x, 10x, 16x, 24x DVD-R 2x, 4x, 8x, 16xPCAV DVD-R DL 2x 4-2-1. Block Diagram Wobble CLV Servo4-2-2. Wobble CLV Servo CD-R 4x, 8x, 16x, 24x, 32x DVD-RW 1x, 2x, 4x DVD+R 2.4x, 4x, 8x, 12x, 16xPCAVR2S35002 IC101 R2S35002 RF AMP Analog Signal ProcessorMAJOR IC INTERNAL BLOCK DIAGRAM AND PIN DESCRIPTION TOP VIEWPick BALANCEpin No Pin Functionspin Name Typepin No Equalizer fc auto-adjustment control clock input terminalpin Name TypeType pin Namepin No max. voltageR8J32007 IC301 R8J32007FPV Encoder, Decoder & DSP Singal ProcessorTop View Descramble 1.2 Block DiagramDemodulate Pin Name 1.3 Pin TablePin no Pin noPin No Data PLL/PRML Pin ListPin Name destinationPin No Servo Pin ListPin Name destinationPin No ATAPI Interface Pin ListPin Name destinationPin No Encoder Interface Pin ListPin Name destinationPin No Audio Interface Pin ListPin Name destinationPin No LSI/TEST Control Pin ListPin Name destinationPin No Power Supply/GND Pin ListPin Name FunctionR2S3 0202FP IC601 R2S30202FP SPINDLE MOTOR AND 6CH ACTUATOR DRIVERPackage outline 42 PIN POWER SSOP 42P9R-K Page Input/Output circuit diagram 02 High Frequency/NRZI skew Adjust TROUBLESHOOTING GUIDE01 Laser Power Adjust using RD Power/WR Power/Erase Power 03 Data Slice/Equalizer Boost/Raw Slice/ Equalizer Frequency Adjust08 Servo Loop Gain Adjust 06 Focus Amp. and Total Amp. Adjust07 Tracking Amp. Adjust 11 Focus Offset Adjust for DVD-RAM PID Amp 09 Unwritten Slice Level Adjust for DVD-RAM10 Focus Offset Adjust for DVD-ROM, CD-R/RW 12 Focus Offset Adjust for DVD-RAM Data Error pulse15 Focus Deviation Adjust 13 Tilt Adjust for DVD-RAM14 Tilt Adjust for DVD-R/RW, DVD+R/RW, CD-R/RW 16 Focus Offset Adjust for DVD-R/RW, DVD+R/RW, CD-R/RW19 ADIP BPF/Read Timing Adjust for DVD+R/RW 17 Lens Sensitivity Adjust18 Spindle Offset Adjust 20 Focus Offset Adjust for DVD-R/RW, DVD+R/RWDIDAll Disc 21 RTZ TimeOut Fail22 Focus Servo/Tracking Servo Fail 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 Byte21,22SW701 JR6 Power Supply System Diagram5V in SW702 IC701PCB Poor Analysis - Check list HW Self- Diagnostic function 1. Self-Diagnostic Function by LED Blink 4 The defect of Flash-ROM 2 Does the power supply circuit operate normally?3 Is the clock of MPU in DSP oscillated correctly? 1 IC601R2S30202FP 7ch driver A control mode setup by the control terminal3. Motor, Abnormalities in Actuator System A motor & actuator and its correspondence pin12V GND 5V BLOCK DIAGRAMHost IDE OPUHOP-7632TS HITACHI ME