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2-11

Copyright © 2018 LG Electronics Inc. All rights reserved.

Only for training and service purposes.

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Figure D2-2

Figure D3

Power Cord

2-2) Open the two hooks, disconnect the harness cable from the SMPS PCB, and remove the power cord.

3. Plate Bridge

3-1) Pull the Front Assembly in the direction of



and remove the Plate Bridge in the direction of



.

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Summary of Contents for CK57

Page 1: ... CKS57F W MODEL CK57 CK57 CKS57F W Any reproduction duplication distribution including by way of email facsimile or other electronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition i...

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

Page 3: ...AUTIONS 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 9 SPECIFICATIONS 1 11 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: ...on Remote Control Key OR 2 2 EEPROM Initial Function Initialize data stored in EEPROM and BACKUP RAM data Entrance Key Front Stop Remote Control Key for 5s Exit Key Auto exit Explanation E2P CLR is displayed on the VPD and turn off the power automatically HIDDEN MODE ENTRANCE KEY Audio EXIT KEY Version Check Front Stop Remote Control Key Play for 5s Remote Control Key Play for 1 5s EEPROM INITIAL ...

Page 8: ...ion 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 MCS FINISH AUTO POWER OFF 1 7 Copyright 2018 LG ...

Page 9: ...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 8 Copyrigh...

Page 10: ...g 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 11: ... 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 12: ...Hz AM Tuning Range 522 to 1 620 kHz 520 to 1 710 kHz or 522 to 1 710 kHz SYSTEM Frequency Response 40 to 20 000 Hz Signal to noise ratio More than 75 dB Dynamic range More than 75 dB Bus Power Supply USB 5 V 500 mA AMPLIFIER RMS Output power Total output 1 100 W RMS Front 350 W RMS X 2 4 Ω at 1 kHz 25 THD Subwoofer 400 W RMS 3 Ω at 60 Hz 25 THD FRONT SPEAKER Type 2 Way 2 Speaker Impedance 4 Ω Rate...

Page 13: ...1 12 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 14: ...EWS 2 3 1 CABINET AND MAIN FRAME SECTION 2 3 2 PACKING ACCESSORY SECTION 2 7 3 SPEAKER SECTION 2 8 DISASSEMBLY INSTRUCTIONS 2 10 ASSEMBLY INSTRUCTIONS 2 19 2 1 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 15: ...2 2 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ...

Page 16: ...2 C A00 266 274 D E F C B A A47 273 A46 MAIN SMPS H CABLE1 G 263 F CABLE2 254 254 E FRONT A43 A45 272 272 EXPLODED VIEWS 1 CABINET AND MAIN FRAME SECTION NOTES THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE 2 4 2 3 ...

Page 17: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 2 6 2 5 ...

Page 18: ...2 7 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 900 Remote control 825 FM antenna 2 PACKING ACCESSORY SECTION ...

Page 19: ...2 8 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes A60 3 SPEAKER SECTION 3 1 FRONT SPEAKER ...

Page 20: ...2 9 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes A90 3 2 SUBWOOFER SPEAKER ...

Page 21: ...ics Inc All rights reserved Only for training and service purposes DISASSEMBLY INSTRUCTIONS Figure D1 Figure D2 1 1 Case 1 1 Remove the 5 Screws 1 2 Remove the Case 2 Power Cord 2 1 Pull the Power Cord in the direction of Figure D2 1 ...

Page 22: ...training and service purposes Figure D2 2 Figure D3 Power Cord 2 2 Open the two hooks disconnect the harness cable from the SMPS PCB and remove the power cord 3 Plate Bridge 3 1 Pull the Front Assembly in the direction of and remove the Plate Bridge in the direction of ...

Page 23: ...8 LG Electronics Inc All rights reserved Only for training and service purposes Figure D4 1 Figure D4 2 4 Front Assembly 4 1 Remove the 2 Screws 4 2 Disconnect the 2 FFC Cables and the 2 Harness Cables from the MAIN PCB ...

Page 24: ...ights reserved Only for training and service purposes Figure D4 3 Figure D4 4 Front Assembly 4 3 Unhook the 2 Hooks in Figure D4 3 next to Front Assembly 4 4 Unhook the 2 Hooks in Figure D4 4 under the Front Assembly 4 5 Remove the Front Assembly ...

Page 25: ...reserved Only for training and service purposes Figure D5 Figure D6 1 5 Knob 5 1 Remove the Knob by inserting a flat head screwdriver in the position marked Figure D5 6 FRONT PCB 6 1 Remove the 8 Screws from the FRONT PCB 6 2 Remove the 2 Plate Grounds ...

Page 26: ... for training and service purposes Figure D6 2 Figure D7 FRONT PCB 6 3 Unhook the 2 Hooks from the FRONT PCB in the Figure 6 2 6 4 Removing the FRONT PCB be careful that the USB Connector does not fall apart 7 JACK PCB 7 1 Unhook the 1 Hooks and Remove the JACK PCB ...

Page 27: ... LG Electronics Inc All rights reserved Only for training and service purposes Figure D8 Figure D9 8 BT Module 8 1 Unhook the 2 Hooks and Remove the BT Module 9 Panel Rear 9 1 Remove the 5 Screws 9 2 Remove the Panel Rear ...

Page 28: ...Inc All rights reserved Only for training and service purposes Figure D10 Figure D11 10 MAIN PCB SMPS PCB 10 1 Remove the 9 Screws 10 2 Disconnect the 2 FFC Cables 10 3 Remove the MAIN PCB and SMPS PCB 11 Chassis 11 1 Remove the Chassis ...

Page 29: ...2 18 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes Figure D12 12 MD 12 1 Remove the 4 Screws 12 2 Remove the MD ...

Page 30: ...hts reserved Only for training and service purposes ASSEMBLY INSTRUCTIONS Figure A1 Figure A2 1 1 MD 1 1 Assemble the MD 1 2 Tighten the 4 Screws 2 MAIN PCB SMPS PCB 2 1 Assemble the Chassis c Be careful because the area around the bracket is sharp ...

Page 31: ... and service purposes Figure A2 2 Figure A3 MAIN PCB SMPS PCB 2 2 Assemble the MAIN PCB SMPS PCB 2 3 Connect the 2 FFC Cables 2 4 Tighten the 10 Screws 3 Panel Rear 3 1 Assemble the Panel Rear c Be careful because the area around the Panel Rear is sharp 3 2 Tighten the 5 Screws ...

Page 32: ...2 21 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes Figure A4 Figure A5 4 BT Module 4 1 Assemble the BT Module 5 JACK PCB 5 1 Assemble the JACK PCB ...

Page 33: ... LG Electronics Inc All rights reserved Only for training and service purposes Figure A6 1 Figure A6 2 6 FRONT PCB 6 1 Assemble the front PCB to match the marked hook 6 2 Assemble the Plate Ground 6 3 Tighten the 8 Screws ...

Page 34: ...pyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes Figure A7 Figure A8 1 7 Knob 7 1 Assemble the Knob 8 Front Assembly 8 1 Assemble the Front Assembly to the marked hook ...

Page 35: ...018 LG Electronics Inc All rights reserved Only for training and service purposes Figure A8 2 Figure A8 3 Front Assembly 8 2 Connect the 2 FFC Cables and the 2 Harness Cables from the MAIN PCB 8 3 Tighten the 2 Screws ...

Page 36: ... Electronics Inc All rights reserved Only for training and service purposes Figure A9 Figure A10 1 9 Plate Bridge 9 1 Assemble the Plate Bridge 10 Power Cord 10 1 Insert the Power Cord into the hook as shown in Figure D10 1 ...

Page 37: ...nics Inc All rights reserved Only for training and service purposes Figure A10 2 Figure A11 Power Cord 10 2 Insert the Power Cord into the Panel Rear as shown in Figure D10 2 11 Case 11 1 Assemble the Case 11 2 Tighten the 5 Screws ...

Page 38: ...AMP PART CHECK 3 22 7 AUX TUNER FUNCTION CHECK 3 23 8 TUNER FUNCTION CHECK 3 23 9 CD FUNCTION 3 24 10 DOUBLE USB FUNCTION 3 25 WAVEFORMS OF MAJOR CHECK POINT 3 26 WIRING DIAGRAM 3 27 BLOCK DIAGRAMS 3 29 1 SYSTEM BLOCK DIAGRAM 3 29 2 POWER BLOCK DIAGRAM 3 31 CIRCUIT VOLTAGE CHART 3 33 1 CONNECTORS 3 33 2 CAPACITORS 3 33 3 ICs 3 34 PRINTED CIRCUIT BOARD DIAGRAMS 3 35 1 SMPS P C BOARD 3 35 2 MAIN P C...

Page 39: ...TH901 or TH903 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 bridge diode BD901 is short circuit by over current with a digital multi meter 3 Check if the NTC thermistor TH901 or TH903 is normal or open 1 1 3 Service hint Any picture Remark F901 If F901 is not short circuit replace it with a same specifica tions one TH901 If...

Page 40: ...set according to the following guide 1 2 D921 D922 1 2 1 Solution Please check and replace D921 D922 on SMPS board 1 2 2 How to troubleshoot Countermeasure 1 Check the anode cathod voltage of D921 D922 with a digital multi meter it is normally 0 2 0 3 V If it doesn t have any voltage it s destroyed Replace it with a new one 1 2 3 Service hint Any picture Remark SMPS schematic diagram ...

Page 41: ... board 2 1 2 How to troubleshoot Countermeasure 1 Check 12VA to IC102 in standby mode If there is no 12 VA check the SMPS 2 Check 12VA and PVDD when power on the set If the set doesn t work regardless of what the KEY2 changes high to low while pressing the power button X500 and X501 work normally but if you can not power on the set replace IC500 with a new one on the MAIN board 2 1 3 Service hint ...

Page 42: ...ermeasure 1 Check if 12 VA is output from SMPS to VFD via the MAIN board 2 Check if Check if VFD_5 V DVCC_3 V to CN304 is normal 3 Check if IC500 outputs VFD_DAT VFD_CLK and VFD_STB to the FRONT board 4 Check if VFD301 output SW signal to the FRONT board If the SW signal isn t output replace VFD301 with new one 5 check if Q300 and Q301 to the FRONT board If the VH signal isn t output replace Q301 ...

Page 43: ...gnal from pin16 of IC401 If no signal check 3 3 V RF and X400 2 Check the SPIN SPIN from IC400 to CN401 for driving SPINDLE motor It is about 3 6 Vp p If no signal check VDD_CORE and DVCC_3 3V for IC401 3 Check if the FFC cable is solidly connected between CN401 and MD 4 Check the MD If the spindle motor is sort circuit or has any trouble it can not rotate CD discs Please check the function after ...

Page 44: ...measure 1 Check the SLDO signal from Pin15 of IC401 If no signal check DVCC_3 3V 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 VDD_CORE and DVCC_3 3V for IC401 3 Check if the FFC cable is solidly connected between CN401 and MD 4 Check the MD If the sled motor is sort circuit or has any trouble it can not move the pickup module ...

Page 45: ...o IC401 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 M_5V to IC400 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 sort circuit or has any trouble it can not open or close the tray Please check the function after changing another ...

Page 46: ...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 and X400 2 Check TR TR from IC400 to CN400 for driving the tracking actuator If no signal check M_5V and 5 V 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 on the left ...

Page 47: ...am keep a regular interval with the surface of a CD disc 1 Check the FDO signal from Pin13 of IC401 If no signal check DVCC_3 3V and X400 2 Check F F from IC400 to CN400 for driving the focusing actuator If no signal check M_5V for IC401 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 on the top o...

Page 48: ...A0_OUT IC500_Pin E2 IC700_Pin24 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 3 Check if Digital audio AMP block on Item 5 2 is normal 5 1 3 Service hint Any picture Remark MCS_MCLK 16 93 MHz MCS_BCK 1 4 MHz MCS_DATA_OUT MCS_LRCK 44 1 KHz Waveform of I2S audio interface signals I2S Si...

Page 49: ...face on Item 5 1 2 Check PVDD If PVDD is abnormal check the SMPS 3 Check 12 V for driving the gate of AMP IC a All the powers are normal but if 12 V is low there is possible for AMP IC to be damaged b Remove L702 L703 FRONT L701 and L704 WOOFER one by one When removed a inductance if 12 V is recovered the IC connected to it was damaged c Replace the IC with a new one 4 Check the impedance between ...

Page 50: ...heck 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 3 3 Service hint Any picture Remark D to pin 1 4 of CN502 D to pin 2 5 of CN502 Waveform of USB D signal USB function signal flow I I C 501 M ai n D SP 3 3V_C D VC C 1 2 D EC K M EC H AN I SM M P U P VC C 50 I C 400 M ot or D ri ve SER VO I C 401 4 X O P_SW C L_...

Page 51: ...500 If no signal check AVCC_3 3V DVCC_3 3V for IC202 If is NG replace it a new one 4 Check the following I2S signal flow from IC500 to IC700 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 4 3 Service hint Any picture Remark AUX function signal flow I I C 501 M ai n D SP 3 3V_C D VC C...

Page 52: ..._LRCK MCS_MCLK are entered from IC500 to IC202 3 Check if ADC_DATA_IN is entered from IC202 to IC500 If no signal check AVCC_3 3V DVCC_3 3V for IC202 If is NG replace it with a new one 4 Check the following I2S audio signal flow from IC500 to IC700 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 ...

Page 53: ... normal YES NO Check or replace D902 Is there about 2 5 V at IC941 pin1 Replace IC941 YES YES YES NO D932 normal D935 normal D931 normal Replace D932 Replace D935 Replace D931 YES NO NO NO D933 D934 normal Replace D933 D934 YES NO Power line of main PCB is short NO 3 16 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 54: ...mal YES NO Check or replace D903 Check P_CTRL HIGH signal from MCS Check PC902 Q901 normal Replace Q901 Check or replace Q911 YES NO D951 normal Replace D951 YES NO Is there about 2 5 V at IC951 pin1 Replace IC951 YES NO Q911 base HIGH Power line of main PCB is short NO NO 3 17 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ELECTRICAL TROUBLESHOOTING G...

Page 55: ...k or replace IC931 No VFD YES D931 normal ZD931 normal Q301 Q302 normal Check or replace D931 Check or replace ZD931 Check or replace Q301 Q302 YES YES YES NO NO NO Check or replace VFD POWER SMPS 3 18 Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 56: ..._SCK SF_MISO Check MCS voltage 3 3 VA Check IC500 NO NO NO YES YES YES YES ELECTRICAL TROUBLESHOOTING GUIDE 2 MCS PART CHECK YES YES YES YES YES MCS PART CHECK OK Refer to SMPS troubleshooting Check and change IC101 X500 24 MHz X501 32 768 kHz Check the operation Check and change IC100 NO NO NO Check if voltage of CN102 Pin13 14 is 12 VA Check if IC101 have 1 2 VA output Check if IC100 have 3 3 VA...

Page 57: ...s not operation OK Check output data IC500 Pin B3 Check input data IC500 Pin F2 B3 B1 Replace IC500 Replace VFD301 Check each Pin voltage FLD light on OK OK OK Refer to SMPS troubleshooting Check CN102 Pin13 14 input 12V voltage Check CN300 connection and power Pin14 16 17 VIN F VDD Check VFD301 voltage Pin27 26 31 32 VH over 27 V SW Signal F over 3 V is OK Check IC500 VFD301 data communication ST...

Page 58: ...ooting Check each line resistor output Replace X700 12 288 MHz OK OK OK Check IC700 Pin21 CLK input Refer to SMPS troubleshooting Check CN102 Pin13 14 12 VA Check X700 12 288 MHz operation Check IC700 input data Pin24 25 PWM wave Check IC700 Check PWM modulator output FL Pin48 49 FR Pin46 47 WF 44 45 Other output check Check CD Assy communication Pin20 21 22 23 24 Check IC700 input data Check X700...

Page 59: ... SMPS troubleshooting Check IC106 for 12 V Check each line resistor output voltage Replace the coil Check IC701 IC702 Pin25 26 38 39 42 43 50 51 55 56 64 input voltage Check PWM Modulator input IC701 Pin4 5 IC702 Pin4 5 10 11 Check PWM modulator output IC701 IC702 pin28 29 36 37 44 45 52 53 NO NO NO Check CN102 Pin13 14 12 VA Pin5 6 7 49 V Check IC701 IC702 Pin64 12 V input Check output line coil ...

Page 60: ...ining and service purposes ELECTRICAL TROUBLESHOOTING GUIDE 7 AUX TUNER FUNCTION CHECK FUNCTION CHECK IC500 output data Replace IC201 Check IC202 Pin18 19 ADC MIC_DATA SDOUT Pin17 BCK Pin16 LRCK Pin15 MCLK Check IC202 Pin8 ADC 3 3 V Pin13 14 25 DVCC 3 3 V Check CN102 Pin13 14 12 VA Check JK200 TU200 Check IC500 input data Check IC202 Pin18 19 output data Check IC202 Pin8 ADC 3 3 V Pin13 14 25 DVCC...

Page 61: ...e MD CN400 Pin7 about 190 mV Check IM pick up IM driving Focus and tracking is ok Check Vcc of IC401 Replace IC500 Check Cristal X400 Is Motor ok about 12 Ω Is no signal at spk Can the disc insert Disc reading is ok Check the signal of IC401 Pin52 53 54 Check IC500 input output and control line Check the signal 16 9344 MHz at IC401 Pin51 Focus tracking sled signal is ok Is load ok NO NO NO NO NO N...

Page 62: ...0 DOUBLE USB FUNCTION USB FUNCTION Check USB jack CN301 CN302 Replace IC500 Check CN301 Check IC500 Pin U7 U8 A7 A8 Display NO FILE Check USB_5V Display READ Plug in USB device Display NO USB Check USB1_D D R335 336 USB2_D D R301 302 NO NO NO NO YES YES YES YES YES YES YES Check USB audio file in USB device MP3 WMA file is playable ...

Page 63: ... Fig 1 SDRAM IC504 pin38 IC504 pin53 IC504 pin35 IC504 pin19 Fig 2 SERVO IC500 pin M1 1 2 3 4 CD_BCK CD_LRCK CD_DATA MCS_MCLK MCS_BCK MCS_LRCK ADC_DATA Fig 3 1 AUDIO PATH IC500 pin N4 ICIC500 pin N1 ICIC500 pin N2 Fig 3 2 AUDIO PATH IC500 pin D2 IC500 pin E1 IC500 pin D1 IC500 pin E2 8 6 7 10 12 11 9 5 USB_5 V D D Fig 4 USB IC500 pin A8 IC500 pin A7 14 13 ...

Page 64: ...1 F S 32M I C 504 SD R AM I C 400 M ot or D R Tuner M I C PTB U SB 1 U SB 2 M AI N BT m odul e AU X I n SM PS H ar ness FFC FL R L W F JAC K I C 204 EXPEN D ER I C 200 3P M 5 5 M M 5 5 5 M M M M M M 5 5 5 5 5 M M 5 58 8 8 89 9 9 9 9 9 9 9 9 FR O N T 14P B TO B 8P 14P B TO B 8P 8P U S B 17P 10P 8P U S B 17P 4P M D 10P 23P 10P 23P SPK _R LED SPK _L LED 4P WIRING DIAGRAM ...

Page 65: ...LK M 00_15 A00_16 SF_D I D O SF_C S SC K VFD _STB C LK D O R ST M AI N VO L_A B Sear ch A B KEY O P_SW C L_SW U P_SW D N _SW D _SEN SE M O T_M U TE C LO SE O PEN A B C D E F PD LD SPD O SLD O FO D TR D LO AD SLED SPI N TR F D 2S PW M _LR C K BC K D ATA C D _R W M C LK LR C K BC K C D _D AT C D _R ST D For AU X 1 1 2 0 4M B S Fl ash SF_D I D O SF2_C S SC K AU X I N TU N ER FM AM PTB M I C D 1 FM AM...

Page 66: ...03 VFD MIC AMP IC200 TUNER IC700 RF IC401 EXPENDER SPK LED DVCC_3 3V Pull up Resistance MIC ADC IC202 P SENSE MOTO DRIVE IC400 SPK LED CD PICK UP VFD F IC105 TR Switching Amp 12 V TR Switching 12 V DVCC_5V PVDD 48V IC701 IC702 S SMPS 300mA 11 mA 25 mA 163 mA 40 mA 25 mA 5 mA 80mA 150 mA 20 mA 105 mA 32 mA 0 7 mA 486 mA 328 mA 1 mA 486 mA 37 mA 1000 mA 150 mA 100 mA 80 mA 350 mA 680 mA 680 mA 2 2 A...

Page 67: ...01 DC DC Converter Vin 0 3 7 Vsw 0 3 Vin 0 3 Vin 5 17 Vsw 2 4 Vin 5 17 Vsw 2 4 IC102 DC DC Converter VIN 4 2 17 V VIN 11 98 VIN 11 98 IC103 Analog Switch Vin 2 5 5 5 V Vout 0 5 5 V Vin 3 35 Vout 0 5 5 V Vin 3 35 Vout 0 5 5 V IC104 IC105 Analog Switch Vin 0 3 6 V Vout 6 6 V Vin 5 15 V Vout 5 12 V Vin 5 15 V Vout 5 12 V IC200 Line Driver VDD 3 3 6 V VDD 3 32 V VDD 3 32 V IC202 A D Converter AVDD 0 3...

Page 68: ...DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW 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 69: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 37 3 38 2 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 70: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 39 3 40 3 FRONT P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 71: ...Copyright 2018 LG Electronics Inc All rights reserved Only for training and service purposes 3 41 3 42 4 MIC P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

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