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3-5

Copyright © 2018 LG Electronics Inc. All rights reserved.

Only for training and service purposes.

ONE POINT REPAIR GUIDE

3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET

When power on the set, any icons or characters on VFD are not displayed.

3-1. VFD (VFD801)

3-1-1. Solution

Please check and replace DIG300 on FRONT board.

3-1-2. How to troubleshoot (Countermeasure)

1) Check if VFD_12V, DVCC_3.3V and DV_5V are output from MAIN to VFD via the TOP board.
2) Check if the IC501 outputs VFD_CLK, VFD_STB, and VFD_DO to the TOP board(CN804 pin33~35).
3) Check if the VFD grid current amplifier circuit on the TOP board.
Check the drive signal to the transistor’s(Q801, Q802) base.



If the control signals from VFD (SW) isn’t output, replace VFD with a new one.

VFD heat rays is RED : DVCC_5V(IC201 check) Voltage will be high than 5.5V
No VFD : VH(VFD801 pin27) will be not supply about 30V.
No VFD : VFD 12V will be not supply (Check Q205).

3-1-3. Service hint (Any picture / Remark)

DGND

VFD_STB

VCC_5V

VFD_D0

VFD_DO

DVCC_3.3V

+3.3VA

+3.3VA

DVCC_3.3V

VFD_CLK

VFD_12V

VFD_12V

CN804

32

3.3VA

33

VFD_DAT

34

VFD_STB

35

VFD_CLK

36

VF_12V

37

DGND

38

DV_3.3V

39

DGND

40

DV_5.0V

VFD_CLK

VFD_STB

VCC_5V

about

12Vp- p

< CN804 >

Q801, Q802 Base

< Waveform of the grid current driver>

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Summary of Contents for OK99

Page 1: ...EFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CONFIDENTIAL MODEL OK99 P NO AFN78511848 SEPTEMBER 2018 MODEL OK99 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes HI FI SYSTEM ...

Page 2: ...CONTENTS SECTION 1 GENERAL SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 MECHANISM DM19D 1 1 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 3: ...UTIONS 1 5 HIDDEN KEY MODE 1 6 1 HIDDEN KEY MODE TABLE 2 HIDDEN KEY MODE DESCRIPTION PROGRAM DOWNLOAD GUIDE 1 7 FOTA UPDATE STEP USING BT APP 1 10 SPECIFICATIONS 1 12 1 2 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 4: ...solutely never be touched 4 Laser beams may damage the eyes Absolutely never permit laser beams to enter the eyes Also NEVER switch ON the power to the laser output part lens etc of the pick up if it is damaged 5 Cleaning the lens surface If there is dust on the lens surface the dust should be cleaned away by using an air bush such as used for camera lens The lens is held by a delicate spring When...

Page 5: ...e power supply lead wire from the unit 2 All equipment measuring instruments and tools must be grounded 3 The workbench should be covered with a conductive sheet and grounded When removing the laser pick up from its conductive bag do not place the pick up on the bag This is because there is the possibility of damage by static electricity 4 To prevent AC leakage the metal part of the soldering iron...

Page 6: ...atic can generate electrical charges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically shorted together by conductive f...

Page 7: ...SCRIPTION 2 1 Version Check Function Version Check Entrance Key Front Stop Remote Control Key Play for 5s Exit Key Remote Control Key Play for 1 5s Operation explanation Remote Control Key OR VFD Display Example Result MCS Version MICOM Version OPTION Version DEMO Version DJ PRO Version EQ Version EQ Check sum Version 2 2 EEPROM Initial Function Initialize data stored in EEPROM and BACKUP RAM data...

Page 8: ...n and USB2 function Caution When downloading the file you should neither unplug the USB device change to the other function nor power off the device USB device must be unplugged when the downloading process is completed ON VFD DISPLAY SCREEN 1 Fast Format USB device 2 Copy Firmware file to USB device NO USB Insert USB device at USB function SEARCH MICOM UP FINISH AUTO POWER OFF 1 7 Copyright 2018 ...

Page 9: ...B1 function and USB2 function Caution When downloading the file you should neither unplug the USB device change to the other function nor power off the device USB device must be unplugged when the downloading process is completed ON VFD DISPLAY SCREEN 1 Fast Format USB device 2 Copy Firmware file to USB device NO USB Insert USB device at USB function SEARCH FIRMWARE FINISH AUTO POWER OFF 1 8 Copyr...

Page 10: ...t USB1 function and USB2 function Caution When downloading the file you should neither unplug the USB device change to the other function nor power off the device USB device must be unplugged when the downloading process is completed ON VFD DISPLAY SCREEN 1 Fast Format USB device 2 Copy Firmware file to USB device NO USB Insert USB device at USB function SEARCH EQDEMOUP FINISH AUTO POWER OFF 1 9 C...

Page 11: ...ng the BT App with SET the user could find the Device Version info on Setting tab Step3 Select update button When touch the Update button user could update the SET firmware using FOTA Step2 Device version info When touch the Device Version info button user could find the current and latest SET version on pop up menu Step4 Confirm update Select the OK button on the caution message ...

Page 12: ... on BT App Step7 FW Flash Writing Step8 FOTA complete After completed the download from the smart phone the SET overwrite the firmware to flash memory When finishing the flash memory writing pop up message about finish is displayed and the SET auto power off Step6 Transfer FW After completed the download from server smart phone start to transfer the firmware to the SET The progress bar is displaye...

Page 13: ...2 0 Vrms 1 kHz 0 dB 600 Ω RCA jack L R Portable in PORT IN 1 0 Vrms 3 5 mm stereo jack x 1 Microphone MIC 1 2 Sensitivity 20 mV 1 kHz 6 3 mm jack x 2 TUNER FM Tuning Range 87 5 to 108 0 MHz or 87 50 to 108 00 MHz SYSTEM Frequency Response 40 to 20 000 Hz Signal to noise ratio More than 75 dB Dynamic range More than 80 dB Bus Power Supply USB 5 V 500 mA Available Digital Input Audio Sampling Freque...

Page 14: ...ISASSEMBLY INSTRUCTIONS 2 2 EXPLODED VIEWS 2 9 1 CABINET AND MAIN FRAME SECTION 2 9 2 DECK MECHANISM SECTION 2 11 3 PACKING ACCESSORY SECTION 2 13 2 1 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 15: ...l rights reserved Only for training and service purposes DISASSEMBLY INSTRUCTIONS Figure 1 Panel Side L R disassembly 1 Figure 2 Panel Side L R disassembly 2 1 Remove the 6 screws 2 Disassemble each of the two screws located inside the handle ...

Page 16: ...ectronics Inc All rights reserved Only for training and service purposes Figure 3 Panel Side L R disassembly 3 Figure 4 Panel Top disassembly 1 3 Pull out Cover Side Assembly L R in the backward direction 4 Remove the 3 screws ...

Page 17: ...ed Only for training and service purposes Figure 5 Panel Top disassembly 2 Figure 6 Panel Top disassembly 3 5 Remove the two screws on the left and right sides 6 As shown in the figure remove the Panel Top by pushing the front part and lifting the rear part ...

Page 18: ...lectronics Inc All rights reserved Only for training and service purposes Figure 7 Panel Rear disassembly 7 Remove the 9 screws on the Panel Rear Figure 8 Main Set disassembly 1 8 Bracket MD Frame Main Screw 4 EA Disassembly ...

Page 19: ...s Inc All rights reserved Only for training and service purposes Figure 10 Main Set disassembly 3 10 Power Cable Disconnection Figure 9 Main Set disassembly 2 9 Remove the Set LED Connector Speaker LED Connector Speaker Network cable ...

Page 20: ...cs Inc All rights reserved Only for training and service purposes Figure 11 Main Set disassembly 4 11 Grasp both sides and pull upward to remove the assembly 12 Complete removal of the Main Set Figure 12 After detaching the Main Set ...

Page 21: ...2 8 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 22: ...68 267 270 L K MAIN M H G F E C B R R S S D I J A46 263 275 300 A60 265 B J Q Q 251 K L 521 521 521 272 272 272 CABLE1 CN803 SMPS O O N N BT A51 CABLE3 M H D P CABLE4 CABLE5 A47 RMC C CABLE2 273 274 F TOP 251 A50 A00 A41 262 261 CABLE8 CABLE8 A52 A45 A42 277 CABLE7 E 259 258 A44 EXPLODED VIEWS 1 CABINET AND MAIN FRAME SECTION 2 10 2 9 ...

Page 23: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 2 DECK MECHANISM SECTION DM19D 2 12 2 11 1049 1015 1030 A005 A00 ...

Page 24: ...SORY SECTION 2 13 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 826 Filter Ferrite Core 900 Remote Control POWER CORD O M R C ANANT 827 Microphone 825 FM Wire Antenna ON ...

Page 25: ...2 14 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 26: ...MS OF MAJOR CHECK POINT 3 34 1 DSP IC501 3 34 2 PWM IC600 3 35 3 SERVO IC401 3 36 4 MOTOR DRIVER IC400 3 37 5 ADC 3 38 6 USB 3 38 7 BLUETOOTH 3 39 WIRING DIAGRAM 3 41 BLOCK DIAGRAM 3 43 CIRCUIT VOLTAGE CHART 3 45 1 IC VOLTAGE 3 45 2 FAN MOTOR VOLTAGE 3 46 3 SMPS CAPACITOR ZENER DIODE 3 46 4 CAPACITOR VOLTAGE 3 46 5 CONNECTOR VOLTAGE 3 47 PRINTED CIRCUIT BOARD DIAGRAMS 3 53 1 SMPS P C BOARD DIAGRAM...

Page 27: ...00 TH903 BD901 on SMPS board 1 1 2 How to troubleshoot Countermeasure 1 Check if the fuse F901 is open or short circuit 2 Check if the NTC thermistor TH900 TH903 is normal or open 3 Check if the bridge diode BD901 is short circuit by over current with a digital multi meter 1 1 3 Service hint Any picture Remark F901 If F901 is not short circuit replace it with a same specifications one TH900 TH903 ...

Page 28: ... 1 2 2 How to troubleshoot Countermeasure 1 Check if the fuse F911 is open or short circuit 2 Check the Drain Source or Drain Gate Gate Source Resistance of Q905 Q906 with a digital multimeter If it is short condition it s destroyed Replace it with a new one Please replace 2 FET at the same time although several FET is OK 1 2 3 Service hint Any picture Remark F911 If F911 is not short circuit repl...

Page 29: ...5 1 VA CN201 and 3 3 VA IC202 in standby mode If there is no 5 1 VA check the SMPS and if doesn t appear 3 3 VA check the IC202 2 Check 12V DVCC_5V and DVCC_3 3V when power on the set If the set doesn t work regardless of what the KEY3 changes high to low while pressing the power button X500 and X501 work normally but if you can not power on the set replace the IC501 with a new one on the main boa...

Page 30: ... board CN804 pin33 35 3 Check if the VFD grid current amplifier circuit on the TOP board Check the drive signal to the transistor s Q801 Q802 base If the control signals from VFD SW isn t output replace VFD with a new one VFD heat rays is RED DVCC_5V IC201 check Voltage will be high than 5 5V No VFD VH VFD801 pin27 will be not supply about 30V No VFD VFD 12V will be not supply Check Q205 3 1 3 Ser...

Page 31: ...heck voltage of IC202 AND IC205 pin4 on MAIN board If IC202 IC205 pin4 about 5 1 V Input 5 1 VA doesn t come out check 5 1 VA from SMPS board 2 If IC202 IC205 pin4 about 5 1 V is normal check the PWR_CTRL IC204 pin5 is high about 3 3 V If PWR_CTRL isn t high check pin D11 of IC501 R5B78 R214 R233 3 If PWR_CTRL is high check R5B78 and if there s no defective component then check IC204 pin1 short wi...

Page 32: ...TAL X500 4 2 1 Solution Replace X500 on MAIN board 4 2 2 How to troubleshoot Countermeasure 1 If 3 3 V 1 2 V is normal check reset High of IC501 pin T12 on MAIN board If CHIP_RESET isn t high check the IC505 2 If CHIP_RESET is high check the soldering status of 24 MHz crystal X500 3 If the crystal X500 doesn t oscillate check R5B4 R5B6 C5B2 C5B5 around crystal X500 If there s no defective componen...

Page 33: ...eck and replace IC503 on MAIN board 4 3 2 How to troubleshoot Countermeasure 1 If the crystal X500 does oscillate check Serial Flash IC503 on MAIN board Check pin8 VCC pin6 SCLK pin1 CS pin2 SO pin5 SI of below waveform 2 If pin8 6 1 2 5 doesn t come out check damping resistor R5B72 R5B73 R5B74 R5B76 of IC503 If damping resistor of IC503 is OK then replace IC503 it need to download program 3 After...

Page 34: ... 1 Solution Please check and replace IC502 on MAIN board 4 4 2 How to troubleshoot Countermeasure 1 Check below waveform soldering status of SDRAM IC502 on MAIN board If pin17 CAS pin18 RAS pin19 CS pin38 CLK pin29 address pin2 DQ doesn t come out check damping resistor RB102 RB100 R544 RB104 R5B98 2 If resistor is OK then replace IC502 SDRAM 3 After change IC502 if It is still not below waveform ...

Page 35: ...easure 1 Check the SPDO signal from pin16 of IC401 If no signal check DVCC_3 3V RF and X400 2 Check the SP SP from IC400 to CN401 for driving SPINDLE motor It is about 3 6 Vp p If no signal check M_5V for IC400 3 Check if the FFC cable is solidly connected between CN401 and MD 4 Check the MD If the spindle motor is short circuit or has any trouble it can not rotate CD discs Please check the functi...

Page 36: ...motor among them 5 2 SLED MOTOR 5 2 1 Solution Replace IC401 or IC400 on MAIN board 5 2 2 How to troubleshoot Countermeasure 1 Check the SLDO signal from pin15 of IC401 If no signal check DVCC_3 3V RF and X400 2 Check the SLED SLED from IC400 to CN401 for driving SPINDLE motor It is about 2 9 Vp p If no signal check M_5V for IC400 3 Check if the FFC cable is solidly connected between CN401 and MD ...

Page 37: ... L4 of IC501 to IC400 If no signal check M_5V for IC400 2 Check LOAD from IC400 to CN401 for driving the tray open close motor It is about 3 85 Vp p If no signal check DVCC_3 3V to IC401 If it has any trouble replace it with a new one 3 Check if the FFC cable is solidly connected between CN401 and MD 4 Check the MD If the tray motor is short circuit or has any trouble it can not open or close the ...

Page 38: ...he laser beam be positioned in the center of a track on CD disc 1 Check the TRD signal from pin14 of IC401 If no signal check DVCC_3 3V RF and X400 2 Check TR TR from IC400 to CN400 for driving the tracking actuator If no signal check M_5V for IC400 3 Check if the FFC cable is solidly connected between CN400 and MD 4 Check the MD If the pickup module has any trouble it can not move the laser beam ...

Page 39: ...s the laser beam keep a regular interval with the surface of a CD disc 1 Check the FDO signal from pin13 of IC401 If no signal check 3 3 V RF and X400 2 Check F F from IC400 to CN400 for driving the focusing actuator If no signal check M_5V for IC400 3 Check if the FFC cable is solidly connected between CN400 and MD 4 Check the MD If the pickup module has any trouble it can not move the laser beam...

Page 40: ...ck USB_5V to TOP board If 5 1 VA to pin5 of IC207 Analog Switch doesn t come out check pin8 9 of CN201 If 5 1 VA is normal IC207 pin4 is high IC207 pin1 doesn t come out 5 V then check the USB_5V short with GND 2 Check Digital audio AMP block 6 1 3 Service hint Any picture Remark D D D D R223 10K DGND C220 1uF USB_5V DRV_VBUS2 0 C270 100nF R217 4 7K C225 10uF 5 1VA DGND R235 47K DGND DGND C228 10u...

Page 41: ...ow to troubleshoot Countermeasure 1 Please check if this system is on bass blast mode FL FR SW1 SW2 make sound only on bass blast mode 2 Check the IC700 IC701 IC702 IC703 on your eyes 3 Check the audio signal output check pin13 of IC700 IC703 First check the PWM data input pin3 of IC700 IC703 4 If the audio signal output has no output on the speaker try to change IC which has no output 5 Lastly ch...

Page 42: ...is symptom occurs when DC protection is detected Main reasons are like below When some of AMP FETs dead 8 1 3 Service hint Any picture Remark Notice for FET service In case of RF6775 Metal case FET Drain has electric potential So be careful when you deal with it You can see FET after removing heatsink Notice for Service Before repair Main Assy you need to discharge SMPS After then open the connect...

Page 43: ... Speaker No Audio 9 1 AMP IC IC700 IC703 9 1 1 Solution Replace IC700 IC703 on MAIN board 9 1 2 How to troubleshoot Countermeasure 1 Check supply voltage of AMP CN702 PWM signal Normal supply voltage and signal Check AMP IC Poor supply voltage Check SMPS Assy Poor signal Check PWM IC601 2 Check CSD of FET driver IC IRS2092 CSD has about 5 V on normal state When AMP has problem CSD is LOW state or ...

Page 44: ...eck DVCC_3 3V AVCC_3 3V ADC for IC301 If is NG replace it a new one 4 Check the following I2S signal flow from IC501 to IC601 If there is any trouble check the power for each IC The power is normal but if the signal waveform to the IC is distorted or no signal replace it with a new one 5 Check if the digital audio AMP block is okay If AMP is damaged replace it with a new one 10 1 3 Service hint An...

Page 45: ...ck if ADC_DATA is entered from IC301 to IC501 If no signal check DVCC_3 3V AVCC_3 3V ADC for IC301 If is NG replace it a new one 6 Check the following I2S signal flow from IC501 to IC601 If there is any trouble check the power for each IC The power is normal but if the signal waveform to the IC is distorted or no signal replace it with a new one 7 Check if the digital audio AMP block is okay Refer...

Page 46: ...LRCK DSPI_MCLK are entered from IC501 to IC301 3 Check if ADC_DATA is entered from IC301 to IC501 If no signal check DVCC_3 3V AVCC_3 3V ADC for IC301 If is NG replace it a new one 4 Check the following I2S audio signal flow from IC501 to IC601 If there is any trouble check the power for each IC The power is normal but if the signal waveform to the IC is distorted or no signal replace it with a ne...

Page 47: ...or ICA301 replace ICA301 with a new one if it has a problem 3 Check if DSPI_BCK DSPI_MLCK DSPI_LRCK is entered from IC501 to IC301 4 Check if MIC_DATA is entered from IC301 to IC501 If no signal check DVCC_3 3V AVCC_3 3V ADC for IC301 If it is abnormal change replace it a new one 5 Check the following I2S signal flow from IC301 to IC501 If there is any trouble check the power for each IC If the si...

Page 48: ... L1 to IC501 DSP 3 Check if MCS_BCK MCS_LRCK MIX_DATAN is entered from IC501 to IC601 If no signal check 1 2 VA for IC501 If it is abnormal change replace it a new one 4 Check the following I2S signal flow from IC501 to IC601 If there is any trouble check the power for each IC If the signals are abnormal replace it a new one 5 Check if the digital audio AMP block is okay Refer to Digital Audio AMP...

Page 49: ... Power line of MAIN PCB is short Replace F901 same fuse Check or replace D963 Is D960 D961 normal Replace BD901 Check PWR_CTRL From DSP IC501_D11 Check and replace IC951 Or check line of MAIN PCB is short or not Check or replace D960 D961 NO NO NO NO NO Is the F901 normal Is the VCC 14 VA supplied to IC951 pin1 Is the VCC 11 V 25 V supplied to IC901 pin4 Is BD901 normal Is there H signal at IC951 ...

Page 50: ... check line of MAIN PCB is short or not Check or replace Q951 Is the VCC 7 VA supplied to IC953 pin2 Is there H signal at Q953 Base NO NO NO Is the D967 normal YES YES YES No output AMP gate line Check or replace R9C7 R938 Check or replace D952 D959 Check and replace IC952 Or check line of MAIN PCB is short or not Is the VCC 13 VA supplied to IC952 pin1 to pin3 NO NO Is the R9C7 R938 normal YES YE...

Page 51: ...eck or replace IC904 Q908 Q910 Q907 Q909 Check or replace IC902 and Check Q905 Q906 gate pin1 Components Resistors Diodes Is Q905 Q906 OK Replace Q905 Q906 Check or replace D954 D955 Check line of MAIN PCB is short or not Is the C904 Voltage about 390 V Is F911 normal Is the PFC_P CTL OK Is the AMP_P CTL OK Is the VCC 12 V supplied to IC904 pin16 Is the VCC 12 V supplied to IC902 pin2 NO YES NO NO...

Page 52: ...NT board OK Check FFC cable Check FFC cable Check MAIN board Check SMPS board Replace VFD801 F VH voltage OK Check MAIN board HELLO Display on FLD OK When turn the volume count is change NO NO NO NO NO NO NO CN102 cable connection OK Check CN102 pin33 34 35 data signal OK CN102 pin33 34 35 data signal OK CN102 pin32 36 38 40 power OK YES YES YES YES YES YES ...

Page 53: ... MON_MPD CN400 pin22 About 180 mV Check IC501 Check loading motor Check IC501 OPU driving Focusing Tracking OK Check OPU Pick up module Is motor impedance about 12 Ω IC401 pin34 35 36 I2S output signal OK Can disc insert IC501 pin N1 N2 N4 I2S input signal OK Disc reading OK NO NO NO NO NO NO NO NO NO IC401 RF Servo signal OK Focusing Tracking Sled signal OK LOAD OK YES YES YES YES YES NO YES YES ...

Page 54: ...UIDE USB play Check DRV_VBUS2 0 signal NO IC207 USB Power USB_5V OK YES A A When insert USB IC501 pin U7 U8 A7 A8 USB_D signal OK NO YES YES YES YES AUX Check audio jack Replace IC301 Check IC501 NO NO NO IC301 pin1 2 AUX input signal OK IC301 pin18 ADC_data output signal OK IC301 pin15 16 17 I2S input signal OK NO AUDIO CHECK ...

Page 55: ...pin29 30 PT_L R input signal OK IC301 pin18 ADC_data output signal OK IC301 pin15 16 17 I2S input signal OK TUNER Check control signal from IC501 to IC301 IC302 pin5 6 7 8 TUNER control input signal OK Replace IC301 Check control signal from IC501 to IC302 IC301 pin15 16 17 I2S input signal OK IC301 pin18 ADC_data output signal OK NO NO NO A IC301 pin27 28 TUNER_L R input signal OK NO YES YES YES ...

Page 56: ...O NO IC501 pin D1 E1 I2S clock signal OK IC601 PWM data output signal OK IC501 pin E2 I2S data signal OK NO AUDIO CHECK OPTICAL Check VCC 3 3 VA optical jack IC304 pin9 10 17 18 32 optical control input signal OK Replace IC304 Check control signal from IC501 JK302 pin1 input signal OK IC304 pin27 28 29 31 data output signal OK NO NO NO A Is the DVCC 3 3V supplied to IC304 pin3 NO YES YES YES ...

Page 57: ...C702 IC703 Check IC601 IC603 Check SMPS Check Q714 Q715 Q701 Q702 Pin47 48 49 50 of IC601 FL FR signal OK Pin13 of IC700 IC701 FL FR audio signal OK IC602 FL FR audio signal OK 66 V B 12V 5 V power voltage OK Q705 Q706 Q707 Q708 OK Pin45 46 of IC601 SW signal OK Pin13 of IC702 IC703 SW audio signal OK IC603 SW audio signal OK 66 V B 12V 5 V power voltage OK Q714 Q715 Q701 Q702 OK NO NO NO NO NO NO...

Page 58: ...TING Speaker LED NO LIGHTING Sparkle X Flash LED YES YES YES YES NO Power on Check IC206 Check and replace Q150 Q152 Q156 Push the LIGHTING button Trun on the LED Check speaker LED assy NO NO IC206 LED_5V OK Check Q150 Q152 Q156 LED_5V YES YES Check and replace Q151 Q157 Q195 Check Sparkle X Flash LED assy NO Check Q151 Q157 195 LED_5V C C ...

Page 59: ...SB20 U9 VDD33OSC U10 PXI U11 PXO U12 VSS33OSC T10 PDD12ALIVE T11 PTEST T12 PRESETN T13 PREMOCON PGPE 10 U13 PHUARTRX PGPE 11 P10 PGPE05 U14 PSPDIFRX PGPE 12 P11 PGPE06 T14 PEXTSRC0 PGPE 13 N11 PGPE07 T15 PEXTSRC1 PGPE 14 U15 PWAKEUP T16 VDD30RTC U16 PRTCXI U17 PRTCXO P12 VDD12PLL P13 VSS12PLL R5B83 1K 1K R5B62 R5B90 330 R5B48 33 R5B58 470 C5B22 1uF 100 R5B59 C5B13 100nF X501 32 768KHZ R5B55 100 R5...

Page 60: ... SLRCK 28 SSDIN0 29 SSDIN1 30 SSDIN2 31 SSDIN3 32 VSS 33 TOCAP_REG1 34 VIN33_REG1 MCS_BCK SLRCK C623 100nF R609 33 C620 10uF C621 10uF WL_I2S_C_WF WL_I2S_LRCK WL_I2S_BCK SSDIN1 MSDIN1 SSDIN3 SSDIN0 MSDIN3 2 PWM IC600 X XI XO Fig 2 2 DSP to PWM I2S IC601 pin19 23 Fig 2 1 Crystal 24 576 MHz IC601 pin4 5 X601 6 5 7 8 9 6 5 C613 8pF R601 0 C603 8pF X601 24 576MHz 1 INPUT OUTPUT 2 FLOAT 3 INPUT OUTPUT ...

Page 61: ...8 MCK 19 DIN DOUT 20 R W 21 BUSY 22 SUBSYQ 23 SUBDATA 24 SUBCK 25 WFCK 26 VDD_CORE 27 DGND 28 CLK 29 CLK88 30 RESETB 31 XBUFO 32 DGND VDD_CORE CD_16M CD_SUBSYQ CD_MCK CD_DIN_OUT CD_RESB CD_RW CD_BUSY DVCC3 3V 3 SERVO IC401 X XI XO Fig 3 2 CD 16M IC401 pin31 Fig 3 1 Crystal 16 9344 MHz X400 11 10 12 11 10 X400 16 9344MHz C445 15pF R423 1M C444 15pF RFGND R422 220 RXI RXO ...

Page 62: ...TK 17 VOLD 18 VOLD 19 Vcc2 20 VCCD 21 VCTL 22 GND 23 VINLD 24 RESET 25 TRB_2 26 VINTK 27 BIAS 28 MUTE C428 100nF MGND R417 5 6K C427 220uF16V M_5V M_5V LOAD LOAD SLED SLED F F SPIN TR TR SPIN SLD0 FD0 MOT_MUTE TRD SPD0 VREF MOT_OPEN MOT_CLOSE C440 100nF 4 MOTOR DRIVER IC400 Fig 4 1 LO LO MOT_OPEN MOT_CLOSE for Driving TRAY Motor IC400 pin6 7 9 10 16 15 14 13 Fig 4 3 SP SP for Driving SPINDLE Motor...

Page 63: ...NR3 VIN3P 2 VINR2 VIN2M 26 MD0 12 DGND 19 GPIO3 IntC 13 DVDD 14 IOVDD 17 BCK 18 DOUT 15 SCKI 3 3V 16 LRCK DSPI_BCK DSPI_LRCK DSPI_MCLK R308 33 R312 33 BT_ADC_SCL ADC_DIR_DAT C317 1nF C318 1nF PT_L PT_R C322 10uF C321 10uF R322 5 6K R323 5 6K R320 33 R321 33 R319 33 TP313 TP312 TP311 R374 100K R375 100K AGND R376 100K AGND R377 100K PTGND PTGND PTGND A D ADC PART 27 26 24 25 DGND TP507 TP515 TP511 ...

Page 64: ...9100nF TP502 TP501 C510 10uF CN504 1 SDA 2 SCL 3 GND 4 TXD 5 GND 6 RXD 7 RTS 8 CTS 9 RESET 10 VDD 3 3VA R501 0OHM R504 0OHM R507 0OHM L508 C522 33pF NC C514 33pF BT_RST BT_CTS BT_RTS BT_RX BT_TX BT_DAT L507 L506 L505 3 3VA R5B1 4 7K R5B2 4 7K BTGND C561 10uF C508 10uF DGND BT_ADC_SCL BT Module Main 7 BLUETOOTH B BT_TX BT_RX BT_RST BT_TX BT_RX BT_RST BT_TX BT_RX BT_RST Fig 7 BT_TX BT_RX BT_RST CN50...

Page 65: ...3 40 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 66: ...ANISM M P UP VCC50 B T 10Pin W L Option SUB PCB RMC Mic SMPS PCB 8Pin 12Pin 8Pin Sub Woofe r Front L R SMPS PCB S_Lighting PCB Spk LED PCB S_Lighitng PCB 4Pin 12Pin Harness Cable FFC Cable S W center position Lower lighting part Upper lighting part S_Lighting Sparkle X flash Sub Woofe r Front L L R Speaker Unit System TOP PCB USB 1 2 8Pin 15Pin 4Pin 11Pin 6Pin FAN 3Pin WIRING DIAGRAM ...

Page 67: ...T MUTE MIX_DATAx_OUT MCS_LRCK BCK For RCU TUNER_L R For MIC DRM_WEN CAS RAS SEL CLK CKE M00_15 A00_16 SF_MOSI MISO SF_CS SCK SF_MOSI MISO SF2_CS SCK D1 D2S VFD_STB CLK DO MAIN V_A B KEY 1 2 3 LANDING_GEAR MCS_CS RX TX BT_TX_RX BT_PCM_BUFFER AMP_OSC to IRS2092 4ea FL_OUT_P N FR_OUT_P N SW_OUT_P N IR_IN_FL IR_IN_FR IR_IN_SW IR_IN_SW FRONT_R SE FRONT_L SE SW BTL SW BTL PTB PORTABLE IN OUT1 16 LED_EXP...

Page 68: ...disc player 85 C 13 IC501 IC Digital Signal Processors Digital Power 3 3V or 1 2V VDD33 3 3VA VDD12 1 2VA VDD 3 38VA VDD 1 25VA IC Digital Signal Processors 85 C 14 IC502 SDRAM VDD 3 0 3 6V VCC 3 3V VCC 3 38V 4 M x 4 BANKS x 16 BITS SDRAM 85 C 15 IC503 Serial Flash Memory VDD 3 0 3 6V VCC 3 3V VCC 3 38V SERIAL FLASH MEMORY 85 C 16 IC504 Serial Flash Memory VDD 3 0 3 6V VCC 3 3V VCC 3 38V SERIAL FL...

Page 69: ... 3 52 2 CN102 MAIN TOP 1 DGND 0 16 2 F_LED_12V 11 10 3 MAIN_VOL_A 3 32 4 MAIN_VOL_B 3 32 5 FILE_S_A 0 20 6 FILE_S_B 0 20 7 SCRATCH_B 0 20 8 SCRATCH_A 0 20 9 MIC_VOL_B 3 32 10 MIC_VOL_A 3 32 11 KEY1 3 34 12 KEY2 3 33 13 KEY3 3 34 14 LANDINGGEAR 3 35 15 DGND 0 16 16 3 3VA 3 35 17 DGND 0 16 18 VFD_DAT 3 26 19 VFD_STB 3 27 20 VFD_CLK 3 26 21 DV_3 3V 3 34 22 DV5 0V 5 15 23 DV5 0V 5 15 24 VF_12V 11 99 2...

Page 70: ...FL 0 00 2 FL 0 00 3 FR 0 00 4 FR 0 00 17 CN702 MAIN SMPS 1 B 66 26 2 B 66 26 3 PGND 0 00 4 PGND 0 00 5 B 66 62 6 B 66 62 18 CN703 MAIN SPK 1 SW 0 00 2 GND 0 00 2 SW 0 00 19 CN801 USB1 2 0 1 USB 5V 5 18 2 D 0 10 3 D 0 10 4 GND 0 00 5 GND 0 00 20 CN802 USB2 1 1 1 USB 5V 5 18 2 D 0 10 3 D 0 10 4 GND 0 00 5 GND 0 00 21 CN803 FROM TOP MAIN 1 D2 0 10 2 D2 0 10 3 DGND 0 00 4 USB_5V 5 18 5 USB_5V 5 18 6 D...

Page 71: ...P 2 52 12 FLASH_ RED_R_UP 2 57 24 CN1102 SPARKLE_L X FLASH Left 1 GND 0 10 2 FLASH_ BLUE_L_UP 2 04 3 FLASH_ BLUE_L_UP 2 04 4 FLASH_ RED_L_UP 2 21 5 FLASH_ RED_L_UP 2 21 6 GND 0 10 25 CN1103 SPARKLE_L X FLASH Right 1 GND 0 10 2 FLASH_ BLUE_R_UP 1 76 3 FLASH_ BLUE_R_UP 1 76 4 FLASH_ RED_R_UP 2 10 5 FLASH_ RED_R_UP 2 10 6 GND 0 10 26 CNA301 MAIN FRONT 1 RMC3 3VA 3 45 2 RMC 3 18 3 DGND 0 00 4 MIC_3 3V...

Page 72: ...3 53 3 54 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 73: ...MPS P C BOARD DIAGRAM BOTTOM VIEW NOTE Warning Parts that are critical with respect to risk of fire or electrical shock Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 74: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 57 3 58 2 MAIN P C BOARD DIAGRAM TOP VIEW ...

Page 75: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 59 3 60 MAIN P C BOARD DIAGRAM BOTTOM VIEW ...

Page 76: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 61 3 62 3 TOP P C BOARD DIAGRAM TOP VIEW ...

Page 77: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 63 3 64 TOP P C BOARD DIAGRAM BOTTOM VIEW ...

Page 78: ...pyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 65 3 66 4 JACK RMC P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW 5 SPARKLE LED P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 79: ...nc All rights reserved Only for training and service purposes 3 67 3 68 6 X FLASH LEFT P C BOARD DIAGRAM 8 SPEAKER LED P C BOARD DIAGRAM 7 X FLASH RIGHT P C BOARD DIAGRAM TOP VIEW TOP VIEW BOTTOM VIEW TOP VIEW BOTTOM VIEW BOTTOM VIEW ...

Page 80: ...op 4 2 2 Clamp Assembly 4 2 2 1 Plate 4 2 2 2 Magnet 4 2 2 3 Clamp 4 2 3 Tray Disc 4 3 4 Pick Up Assembly 4 4 5 Base Up Down 4 4 6 Belt Loading 4 5 7 Gear Pulley 4 5 8 Gear Loading 4 5 9 Guide 4 5 10 Deck PCB Assembly 4 5 11 Motor Assembly 4 5 12 FFC Cable 4 5 DECK MECHANISM EXPLODED VIEW DM19D 4 6 SECTION 4 MECHANISM DM19D CONTENTS ...

Page 81: ...ly 1 Place the Clamp Assembly as Figure B 2 Bending the Cover Top in direction of arrow 2 as Figure B 3 Separate the Clamp Assembly from the Cover Top 2 1 Plate 1 Turn the Plate to a counterclockwise direction and then lift up the Plate 2 Remove the Plate 2 2 Magnet Remove the Magnet 2 3 Clamp Remove the Clamp 1 2 S1 Cover Top Figure A Figure B Clamp Assembly 1 Clamp Assembly Plate Magnet Clamp 2 ...

Page 82: ... separated from the MD Sub Assembly completely Note When reassembling place the Guide as Figure E MD Sub Assembly Figure D 3 1 1 2 2 Tray Disc Tray Disc Figure E Guide 3 Tray Disc 1 Insert and push a flat head screwdriver in the Emergency eject hole H1 at the right side so that the Tray Disc is ejected about 15 20 mm 2 Pull the Tray Disc until it is locked Bottom side view Tray Disc Tray Disc Figu...

Page 83: ...the C portion of the Guide as Figure G 2 When reassembling insert the D portion of the Base Up Down in the Hole H2 of the Base Main as Figure G 3 3 2 Base Up Down Figure G 2 Figure G 1 C B Guide Base Up Down Base Main Figure G B H2 A Figure G 3 D 1 L2 4 Pick Up Assembly 1 Detach the Gasket Tape 2 Disconnect the wires BLK RED BRN ORN from the Deck PCB Assembly by desoldering 3 Remove the 4 screws S...

Page 84: ...Separate the Guide from the Base Main 10 Deck PCB Assembly 1 Disconnect the wires RED BK form the Deck PCB Assembly by desoldering 2 Remove the 1 screw S3 3 Separate the Deck PCB Assembly from the Base Main 11 Motor Assembly Unlock the Locking Tab L4 in direction of arrow and then separate the Motor Assembly from the Base Main 12 FFC Cable Remove the FFC Cable Gear Pulley Belt Loading Deck PCB Ass...

Page 85: ...4 6 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes DECK MECHANISM EXPLODED VIEW DM19D 1049 1015 1030 A005 A00 ...

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