LG CRD-8402B Service Manual Download Page 10 | Manualshive

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Fig. E-3. FEO, SENS Signal

CH1
TP15:
FEO

CH2
TP19:
SENS

Fig. E-4. MDP Signal

CH1
TP25:
MDP

Fig. E-1. FOK, F+ Signal

CH1
TP10:
F+

CH2
TP18:
FOK

Fig. E-2. S-Curve (R505:Open)

CH1
TP15:
S-Curve

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Summary of Contents for CRD-8402B

Page 1: ...verage Access Time Max 6 000KB sec Sustained Transfer rate Photo CD Multisession Disc Spec compliant Multimedia MPC 3 Spec compliant Power Tray Loading Ejection Mechanism 3 Way Eject support Software O C Button Emergency Eject Closed Enclosure Built in ATAPI Interface Controller Software Volume Control 8 Times Digital Filter for CD Audio Front panel Volume Control for Headphone Output Built in MOD...

Page 2: ...verage Access Time Max 6 000KB sec Sustained Transfer rate Photo CD Multisession Disc Spec compliant Multimedia MPC 3 Spec compliant Power Tray Loading Ejection Mechanism 3 Way Eject support Software O C Button Emergency Eject Closed Enclosure Built in ATAPI Interface Controller Software Volume Control 8 Times Digital Filter for CD Audio Front panel Volume Control for Headphone Output Built in MOD...

Page 3: ...MPACT 1 2 5 4 6 7 3 Figure 1 Front View 1 Digital Audio Output Connector This is a digital audio output connector or Video CD output connector You can connect this to the digital audio system or Video CD Board 2 Analog Audio Output Connector The Audio Output Connector connects to a sound card The supplied audio cable is a SoundBlaster type cable If you have a different sound card you will need to ...

Page 4: ...ED flickers but Speaker is silent 20 TROUBLESHOOTING GUIDE 1 Initial Lead in Operation Reset or Power On LED Flickers Pick Up moves to the inner Track Laser on the Pick Up lights Focus Search through moving up and down the lens of Pick Up Focus Servo On FOK Port H FEO TP15 signal generation Rotate disc Tracking Servo On TEO TP14 Signal generation Spindle Servo On MDP TP25 Signal generation Read TO...

Page 5: ...es H output in IC401 pin Check and replace R705 R706 Q701 and LED701 LED703 for DELL Is the CLOCK Frequency of IC401 pin 16 93MHz Check the power input pattern Check IC401 Check and replace X501 33 86MHz X502 40MHz Is the CLOCK Frequency of IC501 pin 16 93MHz Check and replace R407 C530 R444 YES OK NG YES YES NO NO NO 12 35 68 A 1 A 1 ...

Page 6: ...1 pin Is the 1 4V at IC201 pin Check the pattern from IC401 pin to IC201 pin Check IC401 Check the R290 R291 and C290 and then replace IC103 Check the PN301 and then replace the Sled Motor YES YES YES YES NO NO Replace IC201 NO NO 94 41 25 95 5 41 CH1 PIN94 DA0 CH2 PIN95 DA1 CH1 TP4 CH2 TP5 CH3 TP6 CH4 TP7 Fig B 1 DA0 and DA1 Signals Fig B 2 TP4 TP5 TP6 and TP7 Signals ...

Page 7: ...e IC102 Check R118 and replace IC401 YES YES NO NO 1 4 12 Does the focus search signal appear at FAO TP9 Refer to Fig D 1 Is the 1 4V at IC201 pin Check the R290 R291 and R290 and then replace IC103 YES YES YES NO NO Replace IC201 NO 25 Does the focus search signal appear between F TP10 and F TP11 Refer to Fig D 2 C The Laser of Pick Up doesn t light D The Pick UP lens doesn t move up and down D 1...

Page 8: ...ttern from pin of IC201 to pin of PN101 Check the PN101 Pick Up FFC Replace the Pick Up Replace PN101 or Pick Up FFC OK OK NG 34 35 1 4 CH1 TP9 FAO CH1 TP10 F TP11 F Fig D 1 FAO Signal Fig D 2 Focus Search Signal D 1 ...

Page 9: ...o PN201 YES OK 12 13 14 13 12 11 Check Spindle Motor FFC and then replace the Spindle Motor Does the signal appear at FEO TP15 when the R505 opened Refer to Fig E 2 YES YES YES NO NO Replace IC501 Replace IC501 Replace Pick Up NO Do the signal appear at TP15 FEO and TP19 SENS Refer to Fig E 3 Does the signal appear at FOK TP18 during focus search Refer to Fig E 1 E Disc doesn t rotate ...

Page 10: ...26 Fig E 3 FEO SENS Signal CH1 TP15 FEO CH2 TP19 SENS Fig E 4 MDP Signal CH1 TP25 MDP Fig E 1 FOK F Signal CH1 TP10 F CH2 TP18 FOK Fig E 2 S Curve R505 Open CH1 TP15 S Curve ...

Page 11: ...area on the disc read Does LED flicker Does the other disc operate normally Normal Disc is defective YES YES NO 11 NO Does RFAC signal TP16 and RFDC signal TP17 appear Is Spindle Servo ON Does MDP signal TP25 appear YES YES NO NO NO Does A B C D signal appear at IC102 pin 6 7 8 9 Replace IC102 Replace IC102 Replace IC501 Replace Main Circuit Board or MD Ass y NO Refer to C The Laser of Pick Up doe...

Page 12: ... 5V 9 NO Check the R601 R602 and C602 8 Does H signal appear at IC401 pin YES NO 25 Check the IC401 pin and then replace IC401 25 Check C702 YES YES YES Are L ch R ch signals appear at JK701 and Audio Line out connector each NO Check JK701 and L701 L703 Does Audio signal appear at IC701 pin NO 1 7 Is the voltage of IC701 pin 2 5V 6 NO Replace IC701 G During Audio CD play LED flickers but Speaker i...

Page 13: ...ctor and Line or Jack normal NO Check the JK801 and Audio line pattern YES Check your sound card Audio Cable Speaker Volume and Headphone Jack Fig G 1 PWM Signal CH1 PIN6 of IC601 CH2 PIN10 of IC601 Fig G 2 Audio Signal CH2 PIN3 of IC601 CH2 PIN12 of IC601 G 1 ...

Page 14: ... Circuit Board A Remove the Cabinet in the direction of arrow 4 See Fig 1 3 B Release 2 hooks a and remove the CD Tray C Remove the Soldering of the LD and LD B for the Loading Motor and then remove the Main Circuit Board D At this time be careful not to damage the 3 connectors of the Main Circuit Board 2 MECHANISM ASSY A Separate the Pick Up Unit from the Mechanism Assy B Release 1 screws C and t...

Page 15: ... shift to find the track on the Disc 3 RF Signal A B C D RF Signal is converted to Data Signal in One Chip IC IC501 Three signals Focus Error Signal Tracking Error Signal and RF Signal above are I V converted and amplified at the IC102 and then are transmitted to One Chip IC IC501 to generate the Servo Control Signal and Data Signal Red laser Pick Up module Tracking Focusing B C E F D A ...

Page 16: ...C SUM O RFAC RF SUM Output 19 TE_BAL I TE Control 5 GND I GND 20 CE O Center Error Signal Output 6 A I RF Input A Signal 21 CEI CE Amp Inverted 7 B I RF Input B Signal 22 Vcc I Vcc 8 C I RF Input C Signal 23 RFG I RFAC Low Frequency Gain Control 9 D I RF Input D Signal 24 BST I EQ Boost Volume Control 10 E I RF Input E Signal 25 VFC I EQ Cut OFF Frequency Control 11 F I RF Input F Signal 26 RFC I ...

Page 17: ...2 Slide non inverted output 2 6 SL2 Slide inverted output 2 7 GND GND 8 RSL1 Slide current sense 1 9 SL1 Slide non inverted output 1 10 SL1 Slide inverted output 1 11 GND GND 12 W Motor drive output W 13 V Motor drive output V 14 U Motor drive output U 15 RSP Spindle current sensie 16 HW HW sensor amp input 17 HW HW sensor amp input 18 HV HV sensor amp input 19 HV HV sensor amp input 20 HU HU sens...

Page 18: ...essor 84 91 XRD 77 83 76 XWR 75 XCS 74 XTL1 XINT 70 XWAT 69 XTL2 PWM2N PWM2P SENS FOK PWM1N 143 135 134 130 131 PWM1P MIRR DFCT COUT 142 OP Amp DAC SERVO DSP Auto Sequencer 8 bit A D OP Amp Analog SW SAO TAO FAO BSSD DOUT DAC I F CD DSP I F CPU Interface FOK MIRR DFCT XTLO XTLI 138 130 Digital PLL ASY Sync protector PCO V DD Vss 44 FILI 43 FILO 42 CLTV 45 ASYI 49 ASYO 50 WFCK SCOR 60 27 RFDC CE TE...

Page 19: ...in for Anti Shock It set to L When is not used 16 MNT0 XRAOF O 1 0 MNT0 XRAOF Signal Output 17 MNT1 C2PO O 1 0 MNT1 C2PO Signal Output 18 MNT2 XUGF O 1 0 MNT2 XUGF Signal Output 19 MNT3 GTOP O 1 0 MNT3 GTOP Signal Output 20 VDCO Digital Power Supply 2 5V 21 XRST I System Reset L is reset 22 VSCO Digital GND 23 MTST1 I Test Pin Normally L 24 MTST0 I Test Pin Normally L 25 XPLCK WDCK O 1 0 XPLCK WDC...

Page 20: ...Digital GND 56 FOK I O 1 0 Focus OK Signal IN OUT 57 MIRR I O 1 0 Mirror Signal IN OUT 58 COUT I O 1 0 Track Number Count Signal IN OUT 59 GFS O 1 0 GFS Output 60 SCOR O 1 0 Outputs a high signal when either subcode S0 or S1 is detected 61 SQSO O 1 0 SubQ 80bit PCM Peck and Level Data 16bit Output 62 SQCK I SQSO Readout clock Input 63 SENS O 1 Z 0 SENS Output to Sub CPU 64 SCLK I Sens Serial Data ...

Page 21: ...e Active Slave Present Signal Open Drain Output Negative Logic 95 HCS1 I Chip Select Negative Signal from Host 96 HCS0 I Chip Select Negative Signal from Host 97 HA2 I Host Address MSB 98 HA0 I Host Address LSB 99 HA1 I Host Addresas 100 XS16 O Z 0 Host 16 bit I O Port Select Signal Open Drain Output Negative Logic 101 HINT I O 1 Z 0 Host Interrupt Demand Signal Positive Logic 102 XHAC I DMA Ackno...

Page 22: ...20 HDBB I O 1 Z 0 Host Data Bus 121 HDB4 I O 1 Z 0 Host Data Bus 122 HDBA I O 1 Z 0 Host Data Bus 123 HDB5 I O 1 Z 0 Host Data Bus 124 VSIO4 Digital Power Supply GND 125 HDB9 I O 1 Z 0 Host Data Bus 126 HDB6 I O 1 Z 0 Host Data Bus 127 HDB8 I O 1 Z 0 Host Data Bus 128 HDB7 I O 1 Z 0 Host Data Bus 129 VDC3 Digital Power Supply 2 5V 130 XTL2 O 1 0 Crystal Oscillating Circuit Output of the Clock for ...

Page 23: ...LL clock The PLL is designed so that the falling edge of XPLCK coincides with a change point of the EFM signal RFCK is a signal generated at 136 µs periods using a crystal oscillator LOCK is sampling the GFS at 460Hz and outputs H when GFS is H L outputs when L is output eight times in succession or inputs when LKIN is H ...

Page 24: ...OADING MOTOR FOCUS COIL TRACKING COIL M63020FP MOTOR DRIVE Disc Motor unit Optical Pick up CXA2581N RF Amp CXD3030R DSP DRAM I F CLOCK 33 86MHz 16 93MHz I F Cable H O S T M37903F8CHP System Controller AUDIO Circuitry R ch L ch Line out Headphone Jack A B C D 1 2 3 4 5 30 BLOCK DIAGRAM ...

Page 25: ...002 003 030 020 A02 A01 020 051 032 050 029 434 021 434 434 413 413 413 001 413 430 028 027 026 025 033 435 013 010 009 008 011 012 005 034 014 420 434 031 016 015 004 006 431 431 A B C D E F G H 1 2 3 4 5 EXPLODED VIEW 7 8 ...

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