LG CED-8042B Manual Download Page 55

Page: 55 / 74

Check the cold soldering for the R675,

C644 and IC601 pin 62.

Is IC205 pin 19 “H” ?

(CDR/RW)

Normal?

Check the circuit related with

CDR/RW signal.

Repair related part.

Replace IC202 (MICOM).

YES

Do RECD1, RECD2

signals input to IC202 pin 48, 49

normally?

Disc Recognition is abnormal.

Does IC601 pin 26, 27 output

normally?

Is there normal input to

IC601 pin 62?

Replace IC601(AK8563).

Check the cold soldering for the

R661, R668, R644, R645.

Replace IC202 (MICOM).

Is Laser Power output normal?

First Recognition try : 1.0 mW

Second Recognition try : Over 1.2 mW

Go to “Laser is abnormal”

Check IC601 pin 63 (RRF output)
Requirement:
First Recognition try : Over 1.5Vpp
Second Recognition : Over 1.0 Vpp

Satisfy?

Go to “RFDC OUTPUT is abnormal”

Go to <Picture 4>

YES

Summary of Contents for CED-8042B

Page 1: ...quadruple speed 5 Supports CD RW write operation at double speed 6 PIO Mode 4 Multi DMA Mode 2 Support 7 MPC 3 Spec compliant 5 Audio 1 Output 16 bit digital data over ATA interface 2 8 fs Oversampling Filter for CD Audio 3 Software Volume Control 4 Equipped with audio line output and headphone jack for audio CD playback 5 Front panel Volume Control for Headphone Output This service manual provide...

Page 2: ... at once Track at once Variable packet writing Fixed packet writing Multi session 4 Cache memory R W 2 Mbyte 5 Disc diameter 12 cm 8 cm Read only 6 Data capacity Yellow Book User Data Block 2 048 bytes block Mode 1 Mode 2 Form 1 2 336 bytes block Mode 2 2 324 bytes block Mode 2 Form 2 2 352 bytes block CD DA 7 Rotational Speed CD Audio 1X Approx 500 200 rpm at CLV 1 2m s CD RW data 8X Approx 4000 ...

Page 3: ...ipple voltage 2 Current Hold Track State 5V DC 0 8A 12 V DC 0 5A Seeking Spin up 5 V DC 1A 12 V DC 1 4A 6 AUDIO PERFORMANCE Item Typ Limit Test Signal Test Condition Note OutputLevel 0 8 Vrms 10 1KHz 0 dB No Filter at 47 kW S N 85 dB 80 dB 1KHz 0 dB with IHF A 20KHz LPF at 47kW THD 0 05 0 15 1KHz 0 dB with IHF A 20KHz LPF at 47kW Channel 75 dB 70 dB 1KHz 0 dB with IHF A 20KHz LPF at 47kW Separatio...

Page 4: ...udio CD is playing pressing this button will skip to the next track 4 Volume control This is used to adjust the output volume of the headphone jack It can t be used to adjust the output volume for the audio output connectors on the rear panel NOTE Turn the volume down before turning on the power Sudden loud noises can damage your hearing 5 Headphone jack This jack is for connecting headphones or m...

Page 5: ... damage the system Always turn the power OFF when connecting or disconnecting the cable 3 Jumper Connector This jumper determines whether the drive is configured as a master or slave Changing the master slave configuration takes effect after power on reset 4 Analog Audio Output Connector Provides output to a sound card analog signal Generally you need this to play a regular audio CD 5 Digital Audi...

Page 6: ...WFPDSH FPDO FPDIN FVREF SCLK XRAT XRST VSS DVSS DVDD AVSS3 AVDD3 AVSS2 AVDD2 AVSS1 AVDD1 MCLK TESTAGC BIAS AGND2 AGND1 VREF WREF VWDC VWDCN RREF VRDC VRDCN RRF FE TE ATFM VRDC VWDC RFO FEO MPP SPPO ADO BCO SADBC RFOM WRF WRF SLHOLD RRF TESTEQRF DECEFM XDECEFM SLLPFN SLLPFP RRF RZC RECDIN RECD1 RECD2 OSTC TESTEQRF MPP FE TE TEIN MPDSH AIN BIN CIN DIN SPDSH EIN FIN GIN HIN WBLSH GAINUP1 SH_MATRIX RF...

Page 7: ...DVDD I Digital Positive Power Source Pin 22 ATFG O ATIP FG Output Wobble signal after binary operation 23 XTOR O Tracking Amplitude Detection Output 24 XTAND O Off Track Detection Output 25 TZC O Tracking Zero Cross Detection Signal Output 26 RECD2 O Recording Area Detection Signal 2 H Recorded Section L Unrecorded Section 27 RECD1 O Recording Area Detection Signal 1 H Recorded Section L Unrecorde...

Page 8: ...er Output Offset Canceller fc 58 WRF O Write RF Signal Output 59 NC VSS 60 AVSS1 I Analog Ground Pin 61 AVDD1 I Analog Positive Power Source Pin 62 RECDIN I RF Input for Recording Area Detection 63 RRF O Read RF Signal Output 64 MPXOUT O Multiplexer Output for Signal Monitoring 65 AUX1 I Auxiliary Input Pin for Signal Monitoring 1 66 AUX2 I Auxiliary Input Pin for Signal Monitoring 2 67 AUX3 I Aux...

Page 9: ...A 4 12 P2 A 3 11 P2 A 2 10 P2 A 1 9 P2 A 0 8 Port 1 P1 A 7 7 P1 A 6 6 P1 A 5 5 P1 A 4 4 P1 A 3 3 P1 A 2 2 P1 A 1 1 P1 A 0 0 IRQ 4 Bus controller Watchdog timer Serial communication interface SCI x 2 channels A D converter D A converter WDT RES NMI 5 HWR P6 4 RD P6 3 AS P6 2 BACK P6 1 BREQ P6 0 WAIT P6 4 0 CS P8 3 3 1 ADTRG CS IRQ P8 2 2 2 CS IRQ P8 1 1 3 CS IRQ P8 0 0 IRQ P8 7 15 TP PB 6 14 TP PB ...

Page 10: ... selection 22 Vss Vss I GND 23 D4 P44 AKCS O AK interface latch signal output 24 D5 P45 DACS O D A interface latch signal output 25 D6 P46 CXDCS O CXD3011 interface latch signal output 26 D7 P48 SENSCLK O SENS serial data readout clock output 27 D8 P30 SD0 I O DATA IN OUT 28 D9 P31 SD1 I O DATA IN OUT 29 D10 P32 SD2 I O DATA IN OUT 30 D11 P33 SD3 I O DATA IN OUT 31 D12 P34 SD4 I O DATA IN OUT 32 D...

Page 11: ...on mode 76 AVcc AVcc I Analog 5V 77 Vref VREF I A D reference input 78 P70 AN0 ASYM1 I RRF peak hold input 79 P71 AN1 ASYM2 I RRF bottom hold input 80 P72 AN2 2V I 2V 81 P73 AN3 MPXO I Multiplexer input for signal monitering 82 P74 AN4 B_LEVEL0 I B_level0 input 83 P75 AN5 B_LEVEL2 I B_level2 input 84 P76 AN6 DA0 Q104 SLDADJ I Input for sled adjusting 85 P77 AN7 DA1 Q103 SLDMOVE O Sled control outp...

Page 12: ...L1 O Power save control1 output 20 Vcc Vcc 5V 2 No Port Name Assign I O Description 1 OE OE I Output enable input 2 O0 PWRCTL4 O Power save control4 output 3 D0 SD4 I Data input 4 D1 SD5 I Data input 5 O1 TRAY_MUTE O Tray mute output 6 O2 ODOFF O CDR over drive power control output 7 D2 SD6 I Data input 8 D3 SD7 I Data input 9 3 SPN_PHASE O spindle loop phase selection output 10 GND GND 11 CP CP I...

Page 13: ...face SERVO DSP DAC OpAmp FOCUS SERVO TRACKINGSERVO FOCUS SLED TRACKING SLED SERVO OpAmp AnaSw A D CONVERTER MIRR DFCT FOK Peak detector Error corrector data processor Serial parallel processor Register XTLO DV DD 1 DV DD 2 DV DD 3 DV DD 4 DV DD 5 DV SS 1 DV SS 2 DV SS 3 DV SS 4 DV SS 5 AV SS 1 AV SS 2 AV SS 3 AV SS 4 AV SS 5 AV SS 6 BSSD AV DD 1 AV DD 2 AV DD 3 AV DD 4 AV DD 5 AV DD 6 XTLI VPCO1 V...

Page 14: ...rcuit ON OFF L OFF H ON 25 PSSL I Input used to switch the audio data output mode L serial H parallel 26 WDCK O 1 0 D A interface for 48 bit slot Word clock f 2Fs 27 LRCK O 1 0 D A interface for 48 bit slot LR clock f Fs 28 LRCKI I LR clock input to DAC 48 bit slot 29 DA16 O 1 0 Outputs DA16 MSB when PSSL 1 or serial data output from the 48 bit slot 2 s complements MSB first when PSSL 0 30 PCMDI I...

Page 15: ...cation output of XTLI Affected by vari pitch 59 C16M O 1 0 16 9344MHz output Subject to vari pitch control 60 DVDD3 Digital power supply 61 MD2 I Digital Out ON OFF control H for ON L for OFF 62 DOUT O 1 0 Digital Out output 63 MUTE I H for muting L for release 64 WFCK O 1 0 WFCK Write Frame Clock output 65 SCOR O 1 0 H when subcode Sync S0 or S1 is detected 66 SBSO O 1 0 Serial output of Sub P to...

Page 16: ...1 0 Track number count signal input output 103 MIRR I O 1 0 Mirror signal input output 104 DFCT I O 1 0 Defect signal input output 105 FOK I O 1 0 Focus OK input output 106 TESO O Test pin 107 FSW O 1 Z 0 SCOR of command 8 GRSCOR output when SEL H 110 AVSS6 Analog GND 111 SAO O DAC analog output of Sled filter 112 TAO O DAC analog output of Tracking filter 113 FAO O DAC analog output of Focus filt...

Page 17: ...to indicate data error XRAOF is a signal issued when a jitter margin of æ28F is exceeded by the 32K RAM Pin No Symbol I O Description 123 TES2 I Test Pin Normally L 124 TES3 I Test Pin Normally L 129 PWMI I External input of spindle motor 130 DVDD5 I Digital power supply 131 VCOO O 1 0 Output of oscillation circuit analog EFM PLL 132 VCOI I Input to oscillation circuit for analog EFM PLL fLOCK 8 6...

Page 18: ...IN BTCK C2PO ESFS EEFS WGATE HFSW PANICIN EFMNT1 4 E11TP E11TS RESMP ROPC1 ROPC2 VCOIN CPOUT PLLCK XCK CLKIN 33 8688MHz TON DEFS DPLOCK MPWM DMCON MON FGIN REVDET SBRK WBLIN ATIPIO ATIPCK ASYNC SRESB SINT1 SINT0 CS1B CS0B SREB SWEB SRDY SA 15 0 SAD 7 0 DRSTB DD 15 0 DREQ DIOWB DIORB DIORDY DACKB DINT IOCS16B DA1 DA0 DA2 CS1FXB CS3FXB DASPB RA 8 0 RA9 RRAS3B RA10 RRAS2B RA11 RRAS1B RRAS0B RWE0B RCA...

Page 19: ...ength indicator 156 EEFMNT2 OUT EFM NT2 EFM pit pattern length indicator 157 EEFMNT3 OUT EFM NT3 EFM pit pattern length indicator 158 EEFMNT4 OUT EFM NT4 EFM pit pattern length indicator 159 E11TP OUT EFM 11T PIT PATTERN EFM 11T sample hold signal of recording erasing power on writing 160 E11TS OUT EFM 11T SPACE PATTERN EFM 11T sample hold signal of reading power on writing 162 RESMP OUT READ LEVE...

Page 20: ...STIC Diagnostic ATA drive 60 IOCS16B OUT OD IOCS16 ATA 16 bit I O 61 DINT OUT TS DRIVE INTERRUPT REQUEST Device interrupt 63 DACKB IN PU DATA ACKNOWLEDGE DMA REQUEST ATAPI DMA acknowledge HREQ DMA request in case of connection to SCSI DMA 64 DIORDY OUT TS I O READY I O channel ready DSTROBE in case of Ultra DMA DSTROBE DIORB DRIVE I O READ DMA WRITE STROBE ATAPI drive I O read 65 HWRB I O PU DMA w...

Page 21: ...A READ WRITE STATUS Write enable data read write status input for read 41 SWEB RWB IN In the case of CPUTYPE Open 86 type this pin is write enable In the case of CPUTYPE GND 68 type this pin is read write status READ ENABLE DATA STROBE Read enable data strobe input for read 42 SREB DSB IN In the case of CPUTYPE Open 86 type this pin is read enable In the case of CPUTYPE GND 68 type this pin is dat...

Page 22: ...AS0 for DRAM In case of 16 bit bus size is selected this pin is used by a strobe 113 114 115 116 118 119 120 121 123 RD 15 0 I O PU RAM DATA Data for DRAM 124 125 126 Possible to set bus size 16 bit 8bit by setting internal registers 128 129 130 131 Buffer Memory Interface 45 Pin No Pin Name Type Description 9 MONIT0 OUT Monitor 0 Monitor pin This pin is as follows by setting register 0X3E Monitor...

Page 23: ... AX servo reference output C DREQ ATAPI DREQ D COD ATAPI COD E BSY ATAPI BSY F I O ATAPI I O The source of Monitor 0 is set by setting registers as bellow Monitor 0 Sel bit 0 R W Pin No Pin Name Description 33 45 62 76 86 96 DVCC5V 5V VCC 5V Pin Connect to digital 5V 106 117 132 165 10 50 90 141 144 DVCC3V 3V VCC 3 3V Pin Connect to digital 3 3V 145 AVCC3V 3V VCC 3 3V Pin Connect to analong 3 3V f...

Page 24: ... R 1 in EFM CD Mode and at IC209 RL5E808B in wobble CD mode Block Diagram 47 VCC2 RF UOUT VOUT WOUT PWR GND VCC3 BRAKE VCREF VC LMC SIG GND S S FC RS FG VH WIN2 WIN1 VIN2 VIN1 UIN2 UIN1 VCC1 Hall power supply For Rev Voltage reference Thermal Shutdown Direction detector Current Limiter Short Brake Matrix Output Control ...

Page 25: ... input Pin and U phase Schmit comparator input pin for Reverse detection Logic HIGH is represented by UIN1 UIN2 V phase Hall element input Pin and V phase Schmit comparator input pin for Reverse detection Logic HIGH is represented by VIN1 VIN2 W phase Hall element input Pin and W phase Schmit comparator input pin for Reverse detection Logic HIGH is represented by WIN1 WIN2 This pin provides the lo...

Page 26: ... torque Not reverse rotation because the reverse protector W phase output pin Output transistor GND V phase output pin U phase output pin Upper output NPN transistor collector pin three phase common Connect a resistor between Vcc3 and the RF pin for current detection When this voltage is detected the constant current control and current limiter circuits function LMC pin connect to GND Current limi...

Page 27: ... 3 1 3 0 2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 1 9 MUTE2 VS1 VS2 Thermal Shut Down MUTE1 MUTE2 Level Shift Level Shift Level Shift Level Shift VO1 VO2 CH1 VO1 VO2 CH2 VO3 VO4 CH3 VO5 VO6 CH4 VO7 VO8 VO3 VO8 IC901 LA6543 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...

Page 28: ...ratum Lowest Level 21 VREF IN Reference voltage supply for level shift circuit VREF 1 Buffer Amp input 22 VREF OUT Reference voltage for level shift circuit VREF 1 Buffer Amp output 23 VO8 Invert output of CH 4 AMP 8 output 24 VO7 Non Invert output of CH 4 AMP 7 output 25 VS2 Terminal power supply of CH 3 CH 4 26 VO6 Invert output of CH 3 AMP 6 output 27 VO5 Non Invert output of CH 3 AMP 5 output ...

Page 29: ... built in D A converters with output buffer operational amplifiers 2 Outputs of 12 channels are used for adjustment control of reference of the AK8563 servo circuits and references Block Diagram Pin No Pin Name Description 1 Vref GND 2 AO3 Center Error Offset 3 AO4 VC reference 4 AO5 VWDC2 5 AO6 Tray Control 6 AO7 RF DC Offset 7 AO8 Write power reference 8 AO9 Write power reference 9 AO10 DA monit...

Page 30: ...hanged conditions of disc and change in operating temperature Jitter The 16 value of the time variation between leading and trailing edges of a specific I3 I11 pit or land as measured by Time Interval Analysis Deviation The difference between a fixed value of Pit length and Land length TOC Table Of Contents in the Lead in Area the subcode Q channel contains information about the Tracks on the disc...

Page 31: ...4um Pit Groove Land Track pitch p Radial Direction Iw A O a a Groove Land Radial Error Signal The Groove wobble Average center Actual center CD ROM CD R CD RW Standard Yellow Book Orange Book II Orange Book III Record Not available Write once Re writable Tracking Signal I 11 Itop 0 6 0 6 0 55 M11 0 70 HF Modulation Write Laser Power 4 15 mW 6 14 mW Read Laser Power 0 5 mW 0 7 mW 1 0 mW Jitter 35 n...

Page 32: ...strate Reflective Layer Organic Dye Layer Protective Layer Label Printing 1 CD RW disc Laser Beam Groove Substrate Recording Layer Dielectric Layer UL Dielectric Layer TL Protective Layer Label Printing 2 CD RW disc A kind of pigment Quality of Reflective Layer Surface Color Phtalocyanine Gold Silver Yellow White Cyanine Gold Silver Dark Green Light Green Azo Silver Dark Blue ...

Page 33: ...Area Lead out Area Center hole Clamping and Label Area Information Area PCA PMA Test Area Count Area Diameter 15 mm Diameter 45 mm Diameter 120 mm Unrecorded Disc TsL 00 35 65 TsL 00 15 05 TsL 00 13 25 TsL 99 59 74 00 00 00 in out Test Area for performing OPC procedures Count Area to find immediately the usable area in T A TsL start time of the Lead in Area as encoded in ATIP PMA Program Memory Ar...

Page 34: ...he purpose of the Running OPC is to continuously adjust the writing power to the optimum power that is required 2 Principle of Running OPC As the above mentioned effect horizontal direction change of curve occur Beta f B level constant on the Recorded Disc Procedure of the Running OPC During the regular OPC Procedure the correct value for the reflected B level is determined and kept in memory as a...

Page 35: ...C Count Area of PCA ROPC Recordable Capacity of CD R RW Disc 74Minute Record 2048 Byte Sector X 75 Sector Second X 60 Second Minute X 74 Minute 681 984 000 Bytes 682 MBytes But the actual recordable capacity is about 650 Mbytes because about 30 Mbytes are used for organization of directory or volume names according to ISO 9660 specifications ...

Page 36: ...D VCC H A B F VC GND G D C E GND PDIC IC2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 FCS TRK TRK FCS FGND FGND GND F B A H VCC VC G D C E FPD C FPD A PGND 5VA VCC1 AGND GND1 FPD OUT FPDVC VRDC VWDC2 VWDC1 DGND GND2 5VD VCC2 ODON W XR ENBL LDDRIVER IC1 CXA8064N LDA LDA NC LDR VCC1 VCC1 GND1 MACC Cadj AIN AIN AOUT Fadj TEST ENBL DWXR ODON VCC2 GND2 VWDC1 V...

Page 37: ...7 E O PDIC E OUT 18 FPD C I LD Power Monitor Photo Diode Cathode 19 NC _ NC Open 20 PGND _ LD Power GND 21 5VA I LD Analog Voltage 5V 22 AGND _ LD Analog GND 23 FPD OUT O Frequency SW 24 FPDVC I NC Open 25 VRDC I Read Power Analog Control Voltage Input 26 VWDC 2 I Overdrive Analog Control Voltage Input 27 VWDC 1 I Overdrive Analog Control Voltage Input 28 DGND _ LD Digital Voltage 5V 29 5VD _ LD D...

Page 38: ...ignal DPP Method A D B C k X E F G H This signal is generated in RF AMP IC IC601 AK8563 and controls the pick up s left and right shift to find the track on CD Disc 3 RF Signal A B C D This signal is converted to DATA signal in DSP IC IC501 CXD3011R 1 21 H G F E D C B A Pick Up module Photo Diode Tracking Focusing Infrared Iaser Pick Up module Photo Diode Tracking Focusing Infrared Iaser ...

Page 39: ...R 620 R 683 Q602 R633 R686 R697 C606 C604 IC607 H L C R 625 R622 C612 R636 R594 R545 R544 R548 R546 C567 R547 C602 R623 621 640 2V 4V M62352GP DAC 7 IC503 WGate Ropc1 WR RE CDR RW LOGIC I F Block 8 19 4 _ x10 x1 _ _ _ _ S H RFPDSH RLDON AK 8563 IC601 FPDO FPDIN VRDCN VRDC P U RREF VWDCN VWDC WREF FVREF WFPDSH WFPDSH WLDON RFPDSH WLDON WREN WRHOLD S H Gain adj _ 40 43 38 78 79 77 19 25 27 26 7 6 5 ...

Page 40: ...tor output laser power For stabilizing read loop the S H signal RFPDSH which sample and hold the Read Level of laser power in the CD R writing mode is input through Pin 38 of AK8563 Hence S H circuit makes feedback laser power level constant CD RW Three Laser Power Levels Read Erase and Write are used to write on CD RW disc and Erase Level is used during CD RW writing to monitor output laser power...

Page 41: ...M3403 IC601 Pick up KRS 200A LPF Offset Adj Gain Adj A B C D E F G H VC GND VCC PDIC 4 4 LPF AAF BPF EQ RF SRF A D B C _ LPF AK8563 MPP TE RRF DECEFM ATFG _ K AGC AGC Offset Adj Offset Adj Data Slice Circuit Slice Circuit Gain Adj Gain Adj IC209 174 IC501 13 IC501 3 IC501 141 IC501 143 IC501 142 ...

Page 42: ...O T T F_ _ F TAO Track Error Detector Detector 8 D A Level shift Level shift Focus Tracking Sled Motor IC901 Diver LA6543M Actuator Level shift Hall sensor Digital EQ Auto Adj Circuit SLED MOVE SAO IC901 Driver LA6543M Sled control signal IC501 Servo control CXD3011R 1 FAO TAO FE TE TE FE A D M XOR TC7SH86 IC905 IC904 NJM2903V IC903 IC910 4 H1 SLD SLD H1 H2 H2 NJM3403V Sled Clock IC202 m com Speed...

Page 43: ... main beam A B C D but side beams E F and G H for correcting DC offset generated in Push Pull method The remaining procedures of TE signal processing in CXD3011R is similar to Focus Servo After D A converted Tracking servo signal is output through TAO port CXD3011R Pin 112 and drive Tracking Actuator through the Tracking Drive IC IC901 LA6543M 3 4 Sled Servo The working distance of tracking actuat...

Page 44: ...in CD R CD RW 1 2 Spindle servo controlled by IC501 CXD3011R and servo signal is out via MDP Pin 117 3 Spindle Servo is controlled by CLV Control Block of IC209 RL5E808B 27 Spindle Servo Process E F A B D C G H Pick up IC601 AK8563 Wobble Signal Generator 8 6 3 RF SRF PLL BLOCK CD EFM CLV CAV x24 IC551 LB11995H IC209 ATIP CLV FG IC552 SPNFG SPNREV SPNON NJM3403AV RL5E808 IC501 CXD3011R 1 Wobble Si...

Page 45: ...Signal Generating Head Sync Generating Subcode Sync SD 0 7 SA 0 7 Control HOST Interface CD ROM Encoding Decoding EFM Encoding SubCode Generation Write Pulse Control ATIP Decoding Spindle Motor Control Buffer Management ADDR 0 9 RD 0 F SubQ Data Command ATFG DATA Status Error Correction Equalizer Servo Error Signal Gen ALPC Loop Control A F Signal lnput Generating A F Signal H8 3062 AK 8563 RF Amp...

Page 46: ... and fuse Replace IC851 3 9V Regulator Is the pin 4 of IC851 3 9V Are the X201 X202 and X501 oscillating Does the pin 63 of IC202 change 0V to 5V at the power supply initial input mode NO NO YES YES YES YES 53 Is the pin 4 of IC102 3 3V Replace IC102 3 3V Regulator NO Replace X201 X202 and X501 when the power supply of IC202 IC214 and IC215 is OK NO Replace IC202 when the IC101 RESET IC is OK NO R...

Page 47: ...nset CD R Blank Disc and reloading Is Disc rotating too fast Is LOCK signal H IC501 pin 119 Does Disc rotate slowly or stop Go to Sled Motor operating is abnormal Go to Focus Actuator operating is abnormal Go to Laser is abnormal Go to Spindle Motor operating is abnormal Go to Spindle control is abnormal 1 Go to Disc recognition is abnormal Go to Spindle control is abnormal 2 Go to Spindle control...

Page 48: ... SW302 NO Is there Tray drive voltage output IC901 pin 31 32 Is IC901 pin 6 H TRAY_MUTE Check Tray Connector Motor Line Mechanism If it s OK Replace Motor Check TRAY_MUTE and related circuit Then repair it Replace IC901 LA6543 Is the communication normal between IC503 pin 15 16 17 and IC202 pin 24 19 18 When IC503 pin 5 is open Is there Tray drive signal output Check TRAY_CTL pattern IC503 pin5 IC...

Page 49: ...for the Sled Motor connector Check the connection Sled Motor connection CN901 and the Sled Hall PCB of MD Replace Sled Motor Is there Sled drive voltage output IC202 pin 85 Is there the cold soldering Replace IC910 NJM3403AV NO Check operation after repair Check operation after repair Check the cold soldering for the peripheral circuit of the IC910 R934 R960 C930 R998 R993 R994 NO YES NO YES YES Y...

Page 50: ...cation of IC501 and MICOM If it s normal replace IC501 CXD3011R 1 Is there Focus Search drive voltage output IC501 pin 1 13 Check the peripheral circuit of IC913 If it s normal replace IC913 NJM3414AM IsthereFocusSearch drivevoltageoutput IC901pin28 29 Is IC901 pin 15 H Replace IC901 LA6543M YES Check the area between MICOM and IC901 pin 15 If it s OK Replace IC202 MICOM NO NO Go to Picture 3 YES ...

Page 51: ...1995 IS there Spindle drive voltage output IC556 pin 7 IsIC555pin5 DMCON H Check the operation and the cold soldering for the IC209 RL5E808 NO NO NO NO Replace IC555 TC4W53FU Is there MPWM signal ouput IC209 RL5E808 pin 8 Checkthecoldsolderingfortheareaof IC552 NJM3403AV IC503 BU4053 ChecktheshortofRegisterandcapacitor Is there the cold soldering Check operation after repairing the cold soldering ...

Page 52: ...ld soldering for the R203 C272 around IC202 pin 81 If it s OK replace IC202 MICOM NO Is RRF output normal IC601 pin 63 D NO Is MPXO RRF input normal IC202 pin 81 D Check the cold soldering for the IC202 pin 81 R203 C272 Is A B C D output signal of Pick up normal CN601pin9 10 15 16 Go to Laser is abnormal Laser Power Output 1 0 mW NO Check the cold soldering for the area between Pick up connector a...

Page 53: ...ctuator operating is abnormal NO Is IC601 pin 10 TE output Normal in Focusing ON and Tracking OFF Check the peripheral circuit of IC603 BU4053 IC610 NJM3403 If it s OK Replace it NO Tracking Servo is unstable Is IC501 pin 143 TE input normal in Focusing ON and Tracking OFF NO D Replace IC501 CXD3011R 1 Istherenormaldrivevoltage outputfromIC501pin112 TAO in TrackingServoON Check Drive IC IC901 and ...

Page 54: ...s IC601 pin 29 output normal DECEFM Normal Check the peripheral circuit of IC556 If it s OK replace IC506 NJM2100 NO NO NO NO Replace IC507 TC7SH04F Is there spindle drive voltage output in IC556 pin 1 NO Spindle Control is abnormal 2 Is there spindle drive voltage ouput in IC552 pin 1 Is IC555 pin 5 H Check the output status of IC601 pin 29 when it open Check the status of R and C peripheral circ...

Page 55: ...601 pin 26 27 output normally Is there normal input to IC601 pin 62 Replace IC601 AK8563 C NO B Check the cold soldering for the R661 R668 R644 R645 Replace IC202 MICOM Is Laser Power output normal First Recognition try 1 0 mW Second Recognition try Over 1 2 mW NO Go to Laser is abnormal Check IC601 pin 63 RRF output Requirement First Recognition try Over 1 5Vpp Second Recognition Over 1 0 Vpp Sat...

Page 56: ...56 NJM2100M NO NO NO Spindle Control is abnormal 4 Is Spindle drive voltage output normal IC209 pin 8 MPWM Is IC601 pin 22 ATFG output normal Check PCB between IC209 and IC601 D NO A C Check the peripheral circuit of IC209 If it s OK replace IC209 RL5E808B Is there normal input to IC209 pin 174 WBLIN Is IC601 pin 46 ATFM output normal Go to Picture 6 YES YES YES YES YES YES NO NO ...

Page 57: ...Calibration Data of How to use Test Tool Dragon OK Refer to C Calibration of How to use Test Tool Dragon NO Refer to E LD Power Setup of How to use Test Tool Dragon Refer to D LD Inspection of How to use Test Tool Dragon VRDC NG VWDC1 NG E F OK YES YES YES YES NO ...

Page 58: ...R544 R548 R636 IC503 and then replace IC503 P U Pin 25 VRDC 0 9 0 4V Check the cold soldering for the R683 R692 R696 R697 R686 R614 R618 IC601 IC607 and then replace IC601 IC607 Check the cold soldering for the R683 R692 R696 R697 R686 R614 R618 IC601 IC607 and then replace IC601 IC607 IC601 Pin 4 FPDO 2 9 0 3V Check the cold soldering for the P U connector and then replace P U Refer to D LD Inspe...

Page 59: ... R612 IC209 IC401 IC407 and then replace IC209 IC401 IC407 Check the cold soldering for the R545 R594 IC503 and then replace IC503 P U Pin 27 VWDC1 0 3 0 1V IC601 Pin 5 WREF 0 6 0 2V Check the cold soldering for the P U connector and then replace P U Refer to D LD Inspection of How to use Test Tool Dragon NO YES YES YES YES YES NO NO NO NO NO IC601 Pin 4 FPDO 2 9 0 3V Check the cold soldering for ...

Page 60: ...02 Check the cold soldering for the R612 R626 IC209 IC401 IC407 and then replace IC209 IC401 IC407 P U Pin 31 W XR H Check the cold soldering for the R546 R547 IC503 and then replace IC503 P U Pin 26 VWDC2 1 2 0 2V Check the cold soldering for the P U connector and then replace P U NO YES YES YES YES NO NO NO NO Measure LD Power 2 0mW LD Power 8 0mW OK ...

Page 61: ...dle Software Write Tool Version Easy CD creator 3 5b 201S Direct CD 2 5c 236 Go to Writing Part Check Eject disc If CD R disc Use new CD R disc If CD RW disc erase the disc YES NO YES NO YES NO NO YES Is the Write Tool version supported by LG CDRW Driver The disc Finalization Check disc Information on Writing Tool If you get some data information with Non Recordable Disc Message the disc is finali...

Page 62: ...ten file read normally Is the IC614 pin 7 ROPC2 pulse when CD R writing Does the LED1 LED2 Toggle on off when Writing start OPC operation Does the IC204 74VHC374 pin 15 Toggle on off during Writing Check the cold soldering for IC204 74VHC374 pin 15 R337 Q302 R334 LED2 YES YES YES YES YES NO NO Check the cold soldering for IC204 74VHC374 and then replace IC204 Check communication line between IC204...

Page 63: ... WGATE H Is the IC601 pin 43 WLDON H NO NO NO Check the cold soldering for IC403 IC404 IC406 Is the IC404 pin 3 CDR_WR H NO Check the cold soldering for R416 IC404 IC405 Is the IC404 pin 8 WREN pin 11 RFGUP L NO Check the cold soldering for R626 R612 R655 R657 C401 IC407 CN601 pin 30 31 Is the CN601 pin 30 ODON 31 W XR pulse NO Check the cold soldering for IC209 pin 152 153 162 163 164 Check the c...

Page 64: ... CDR_WR L Is the IC404 pin 8 WREN H Is the IC404 pin 11 RFGUP L NO NO Check the cold soldering for IC209 pin 152 153 162 and IC402 IC407 Replace IC209 IC402 IC407 Is the IC209 pin 152 EFM1 153 EFM2 162 RESAMP Pulse NO Check the cold soldering for R626 R612 R655 R657 C401 IC407 and CN601 pin 30 31 Replace IC407 Is the CN601 pin 30 ODON 31 W XR pulse NO Check the cold soldering for IC601 pin 39 38 3...

Page 65: ...3 IC205 IC203 and then replace IC603 IC205 IC203 NO YES Check the cold soldering for the IC603 and then replace IC603 RFBETA 2 1 0V NO YES Check the cold soldering for the D604 R603 R604 C657 Q607 IC617 and then replace Q607 IC617 Check the cold soldering for the IC204 IC203 and then replace IC204 IC203 Is ASYM2 the Peak of RFBETA NO YES YES Check the cold soldering for the D603 R602 R606 C656 Q60...

Page 66: ...vice Click OK B Check Calibration Data 1 Select Calibration Calibration on menu 2 Click Read on Calibration window Results hex data will come out 3 Check Data CD R VRDC DAC 32 5F CD RW VRDC DAC 28 55 VWDC1 DAC 40 A0 VWDC2 DAC 78 C8 SPP 90 B8 Focus Bias Not use 4 Close Calibration window C Calibration 1 Select Calibration Calibration on menu 2 Inserting Test Disc TCD 784 on Tray Load Disc 3 Click S...

Page 67: ...ve outside Laser will be emitted from LD 5 Measure LD Power with LD Power meter Type the result on blank Type without Down to two places of decimals ex 11 34mW 1134 6 Click Setup Result will be displayed with OK or NG 7 Close LD Power Setup window F LD On 1 Take out disc on Tray 2 Select LD Inspection LD ON on menu 3 Select LD ON Mode on Laser On window Click On LD On 4 Execute Test Measure LD Pow...

Page 68: ...f IC802 and CN303 Check the IC801 YES YES YES NO NO NO NO Does the headphone volume VR801 control max Check the headphone volume VR801 YES NO Does the audio signal output at IC802 Pin 1 7 Does the audio signal output at CN303 Pin47 50 Does the audio signal output at IC801 Pin1 7 Check the peripheral components of IC801 JK801 and Cable YES Does the audio signal output at the headphone jack JK801 NO...

Page 69: ...play key Check the cold soldering for the IC202 pin 51 Check the cold soldering for the SW301 R223 and R340 Replace the IC202 YES YES NO NO Is IC202 Pin 51 5V before pressing the SW301 Is IC202 Pin 51 0V pressing the SW301 ...

Page 70: ...tion of arrow 4 See Fig 1 3 B Release 2 hooks a and remove the Clamp Assy in the direction of arrow 5 C Release 2 hooks b and remove the CD Tray drawing forward D Remove the Main Circuit Board in the direction of arrow 6 E At this time be careful not to damage the 4 connectors are positioned at left side of the Main Circuit Board 2 MECHANISM ASSY DISASSEMBLY 2 1 Pick up Unit A Release 2 screws B B...

Page 71: ...2 2 Pick up A Release 1 screw C and remove the Pick up 2 3 Sled Motor Assy A Release 3 screws D and remove the Sled Motor Assy D D D Sled Motor Assy Pick up Unit Pick up C Fig 1 5 9 Fig 1 6 ...

Page 72: ...ssor Focus Servo Tracking Servo Sled Servo Spindle Servo EFM decoding System Control Read Channel Data Processor Servo Processor OPC ROPC Circuit DRAM IC210 IC209 RL 5E808B CD ROM Encode EFM Encode CD ROM Decode LPM ATIP CLV Control ATAPI I F 33 86MHz 34 57MHz Equalizer ALPC Focus Error Tracking Error Wobble Detect RF Amplifier 20MHz 5V GND GND 12V 5V GND GND 12V 8V Reg Host PC Authoring Tool 3 3V...

Page 73: ...T1 SD 7 0 SA 7 0 DATA LINE ADDRESS SPREV REVDET SPFG FGIN MPWM SPBRK SBRK DMCON SPINDLE DRIVER DMCON RICOH WBLIN 3V HAVCADJ DAC 5V H 3 3V CDR RW ODOFF WR RE LAT ROPC OPC RRF MPXO ADC BLOCK VC2V MPXO SLDADJ BLEVEL0 2 ASYM1 ASYM2 ATSY RFGUP WR XX LDON CPU W XR ODON WR SPN8 12CM SPN_PHASE SPN_BOOST DOUT MONIT EPCS SCLK SDATAO PWRCTL1 MA SL LOAD_SW OPEN_SW RFGUP RF EJECT_KEY PLAY_KEY SLED FG SPEED GEN...

Page 74: ...013 420 431 008 009 012 011 014 005 004 015 016 402 402 402 430 430 021 020 500 024 419 025 020 402 027 026 023 022 402 400 413 413 413 413 021 030 029 007 003 002 031 050 010 402 028 001 A01 A02 PBM00 MAIN C B A 11 12 EXPLODED VIEW ...

Search results

Summary of Contents for CED-8042B

Reviews:

Related manuals for CED-8042B

Brands by name

Popular brands

LG CED-8042B, Manual

Search results

Summary of Contents for CED-8042B

Reviews:

Related manuals for CED-8042B

Brands by name

Popular brands