LG MCD23 Service Manual Download

Page: 80 / 87

4-11

LGE Internal Use Only

4-2. Assembly of Mechanism Deck.

[Figure B-1]

•

Guide UD assembly

1) Fix

➊

part of the Guide UD to

➋

part of the Base Main.

2) Move the Guide UD toward the arrow direction(

➌

) from below.

Summary of Contents for MCD23

Page 1: ... SERVICE MANUAL P NO AFN62795812 MINI Hi Fi SYSTEM SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL MCD23 MCS23F Website http biz lgservice com Internal Use Only MAY 2008 ...

Page 2: ... MAIN FRAME SECTION 2 1 MECHANISM DECK EXPLODED VIEW 2 3 SPEAKER EXPLODED VIEW 2 5 PACKING ACCESSORY VIEW 2 6 SECTION 3 ELECTRICAL PART TROUBLESHOOTING GUIDE 3 1 AUDIO PART TROUBLESHOOTING GUIDE 3 1 CD PART TROUBLESHOOTING GUIDE 3 10 WAVEFORMS OF MAJOR CHECK POINT 3 12 WIRING DIAGRAM 3 15 BLOCK DIAGRAMS 3 16 CIRCUIT DIAGRAMS 3 19 INTERNAL BLOCK DIAGRAM OF ICs 3 43 VOLTAGE CHART 3 59 PRINTED CIRCUI...

Page 3: ...stallation screws should absolutely 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 hel...

Page 4: ...where there is excessive dust 2 Notes for repair 1 Before replacing a component part first disconnect the 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 ...

Page 5: ...s anti static 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 con...

Page 6: ...OWER ON Remote control 2 Front STOP push same timing during 5s Use arrow key move to appropriate position and make changes Press ENTER key FLD write OK Remote control 2 Front STOP push same timing FLD display E2P CLR Auto power off Completed option setting Version Setting MODE OPT 0 OPT 0 00 OPT 1 OPT 1 00 OPT 2 OPT 2 00 OPT 3 OPT 3 00 OPT 4 OPT 4 00 ...

Page 7: ... must save the file to the USB storage device and disable the security software then download the file to your set 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 THE VFD DISPLAY SCREEN NO USB 1 INSERT USB DEVICE AT USB FUNCTION 2 WHEN COMPLETED...

Page 8: ...ave the file to the USB storage device and disable the security software then download the file to your set 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 THE VFD DISPLAY SCREEN NO USB 1 INSERT USB DEVICE AT USB FUNCTION 2 WHEN COMPLETED REMOVE...

Page 9: ...Range 87 5 108 0 MHz or 65 0 74 0 MHz 87 5 108 0 MHz Intermediate Frequency 10 7 MHz AM Tuning Range 522 1 620 kHz or 520 1 720 kHz Amplifier Output Power 12 5 W 12 5 W T H D 10 Frequency Response 40 20000 Hz Signal to noise ratio 75 dB CD player Frequency response 40 18000Hz Signal to noise ratio 75 dB Dynamic range 75 dB Speakers MCS23F Type Bass Reflex 1 Way 1 Speaker Impedance 4 Ω Frequency Re...

Page 10: ...0 450 450 MAIN SMPS 291 A26 CD A41 M N D J 260 255 450 450 E I J E F F G H USB KEY DECK FRONT 254 A42 450 253 281 450 455 CABLE1 CABLE4 CABLE3 CABLE2 B CABLE8 CABLE9 CABLE6 CABLE5 450 450 265 A00 454 454 450 450 A49 A40 A43 454 CABLE7 CABLE7 280 SECTION 2 EXPLODED VIEWS NOTES THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTAN...

Page 11: ...02 012 012A 012A 012B 164 173 188 189 190 165 153 156 153A 2 3 2 4 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only MECHANISM DECK EXPLODED VIEWE DECK MECHANISM EXPLODED VIEW 1 MECHANISM DECK EXPLODED VIEW ...

Page 12: ...2 5 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only SPEAKER MCS23F SPEAKER EXPLODED VIEW A80A A80B 851 852 852 A80 854 853 ...

Page 13: ...Only for training and service purposes LGE Internal Use Only 808 Battery 900 Remote Control 801 Instruction Ass y 803 Packing 803 Packing 804 Bag 802 Box 825 Antenna 824 Antenna Loop 818 Portable in Cable I POD Stand 814A OPTIONAL PART PACKING ACCESSORY VIEW ...

Page 14: ... fuse Check the FUSE F901 NO YES Check BD901 LF901 902 NO Check short of P9702 line Check short of P9701 P9702 line NO Check short of P9701 line NO Replace IC901 902 Check the DC V of C905 if DC V is over 400V NO YES Check the DCV of C909 C903 C921 If DCV is in 14 19V And it is steady Check IC901 902 YES YES Check the DC V of C981 C945 If DC V is 6 1V YES Check the DC V of C950 C951 If DC V is in ...

Page 15: ...r 5 6V YES OK OK OK NO Check power circuit Troubleshooting YES VKK CHECK Check the PIN3 o CN1 if DCV is over 28V YES OK NO NO NO Replace IC101 KIA7042 Check if IC101 of output voltage is over4 3V YES YES YES YES YES Check voltage of IC100 LC87Fxxx PIN4 YES Refer to SMPS troubleshooting MICOM PART HECK I Check P SENS P7904_PIN6 NO Check both End voltage of IC101 KIA7042 Check If input voltage of IC...

Page 16: ... SMPS troubleshooting Check If IC103_PIN8 and IC100_PIN14 40 55 89 are 5V X101 32 768KHz X100 9 8304MHz Check the operation Check P SENS P7904_PIN6 Check both End voltage of D101 Check If output of D101 is 5V Check D101 MICOM PART CHECK II NO Replace D101 OK OK YES YES YES YES PIN81 DATA PIN82 CLK Check MICOM NO Check MICOM Voltage 5V CHECK IC100 PIN81 82 NO Replace MICOM NO Refer to micom trouble...

Page 17: ... Voltage input YES Check P7302 Connection and Power pin29 FL 26 pin28 FL 22 pin27 Vkk over 28V pin24 5 6V YES Check IC301 PT6324 Voltage Pin50VKK 28V PIN 9 52 5V YES YES Check each PIN voltage IC100 Check IC301 Data communication Pin Pin 27pin 3pin STB 26pin 2pin data 28pin 1pin clk FLD DISPLAY CHECK OK OK OK NO Replace IC301 NO Replace IC100 NO NO IF voltage is not 5V Check input and output of D3...

Page 18: ... YES YES YES YES YES YES YES YES Check IC604 PS9830 DATA INPUT PIN23 PWM WAVE Check Check PWM Modulator output FL PIN75 74 FR PIN71 70 OTHER OUTPUT Check Check IC604 PS9830 VDD PIN VOLTAGE 3 10 22 29 39 47 56 65 72 87 94 Check X601 PIN2 3 3V OK Replace X601 NO YES Check X601 12 288MHz OK Replace R671 R670 R665 NO YES Check LINE Resistor output SDA R671 SCL R670 RST R665 Refer to CD troubleshooting...

Page 19: ...fer to SMPS Troubleshooting P7905 PIN3 12V PIN13 14 15 13 7V YES YES NO Check each line resistor output voltage Check each IC700 PIN1 22 23 44 12V INPUT YES NO Replace the coil Check output line coil POWER AMP PART CHECK OK Check each IC700 PIN27 26 32 35 40 41 INPUT VOLTAGE YES Check PWM Modulator input each PIN6 8 16 18 YES POWER IC700 PIN28 31 36 39 output ...

Page 20: ...on tuner tape portable output to IC200 BU4052 input L R_CH Check P7501 PIN6 L CH PIN8 R CH Each function output line Check Check IC801 MC4580 PIN 12V PIN 8 12V Check IC805 PIN7 3 3V PIN6 5V Check IC805 PIN13 RST PIN12 BCK PIN 11 MCLK PIN10 LRCK PIN9 DATA Refer to SMPS Check CN801 Connection IC801 MLC3890 PIN55 INPUT DATA IC801 MLC3890 DADATA0 OUTPUT Check P7905 connection After replace IC200 Check...

Page 21: ...y for training and service purposes LGE Internal Use Only 11 TAPE PLAY PART CHECK NO NO PN201 CHECK PIN2 8V Refer to SMPS troubleshooting IC200 BA3308 PIN6 6V Check IC200 PIN3 7 SIGNAL OUTPUT Check IC200 TAPE REC PART CHECK NO Replace IC200 YES OK YES OK YES YES ...

Page 22: ... Internal Use Only 12 TAPE REC PART CHECK YES NO PN201 CHECK PIN2 8V Check INPUT IC201 PIN2 7 NO NO IC201 PIN3 7 INPUT YES YES Check IC200 PIN3 7 SIGNAL OUTPUT Check INPUT IC201 PIN2 7 YES YES YES Check SW201 PIN6 13 PIN3 10 Check IC201 PIN6 7 2V INPUT Check IC201 PIN6 7 INPUT TAPE REC PART CHECK OK ...

Page 23: ... is OK NO YES NO YES Check Motor Drive IC IC807 NO Check OPU Pick up NO Is Load OK Is Motor OK about 12 ohms NO NO OPU driving Focus and Tracking is OK Is can t see the signal at Pin 34 35 36 of IC807 NO Check Vcc of IC807 Is can t see the signal 16 9344MHz at Pin 31 of IC807 NO Check Cristal X802 Check IC801 input output and control line NO Replace IC801 NO Replace Cristal X802 Is no signal at SP...

Page 24: ...Use Only 2 USB PART CHECK NO NO CHECK CN603 Plug in USB Device YES Display READ YES Display NO FILE YES YES YES Display NO USB YES Check USB_ 5V NO CHECK USB JACK JK303 YES Check USB_ D D R863 R865 NO Replace IC801 Check IC801 PIN 116 117 USB FUNCTION CHECK USB AUDIO FILE IN USB DEVICE MP3 WMA FILE IS PLAYABLE ...

Page 25: ...ctronics Inc All right reserved Only for training and service purposes LGE Internal Use Only WAVEFORMS OF MAJOR CHECK POINT 1 3 4 2 1 1 2 4 1 2 3 4 1 1 2 3 4 1 FLASH SDRAM CLK DATA ADDRESS RESET EE TE FOD FE 2 SERVO IC807 IC807 ...

Page 26: ...3 13 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 3 2 1 2 3 3 1 2 3 1 2 3 BCK DATA LRCK 3 AUDIO PATH BCK LRCK DATA IC807 IC801 ...

Page 27: ...3 14 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 2 3 4 1 2 3 MCK BCK LRCK DATA AUDIO_L AUDIO_R USB_5V D D 2 4 3 2 3 1 4 IC807 ...

Page 28: ...ight reserved Only for training and service purposes LGE Internal Use Only 16P CD PCB 2 CH SPK TERMINAL TUNER MODULE 3PAGE MINI MD MAIN PCB USB H P FRONT PCB SMPS PCB 15P 8P P T IN 6P 3P 29P 4P SINGLE DECK MECHA 10P 16P 11P 12P 10P WIRING DIAGRAM ...

Page 29: ...OARD SANYO AUDIO MICOM SANYO AUDIO MICOM 12 288 MHz 9 8304 MHz 9830_RESET 9830_CLK 9830_DAT AMP_PDN AMP_SD BA3308 TAPE IC DECK REC MUTE P B MUTE REC SW P B SW DECK KEY TUNER MODULE ïDAT CLK RDS DATA CLK BU4052 TAPE L R TUNER L R OP AMP CD BLOCK OP AMP LEVEL METER REC L R PT6324 DVD DATA CLK P T INPUT HEAD PHONES BU4052 DATA USB DA 5V VFD DATA CLK CD DATA CLK CS5340 CLK DATA H P PWM OUT AK5358 1 MA...

Page 30: ...B C D E F PD LD I2C R W BUSY SUBSYQ RESET I2S I2S USB CON D SDRAM SDRAM FLASH FLASH AK5358 ADC AK5358 ADC I2S CLK ADC_DOUT I2S_MCK TUNER TUNER AMP POTABLE IN POTABLE IN DECK DECK SLED F T SPINDLE LOAD TDO SLDO SPDO FDO MD SWITCH 12MHZ 16 93MHZ FM AM MLC3890 MCS LOGIC MLC3890 MCS LOGIC RESET POWER I F 5V 12V PWM I2S SWITCH 4052 SWITCH 4052 OPAMP OPAMP L R L R L R L R DATA Address LINE MICOM BLOCK 3...

Page 32: ...R NO CIR CUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTI CAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF FER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AN...

Page 33: ...UIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 3 21 3 22 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 34: ...pyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 3 SERVO CIRCUIT DIAGRAM ...

Page 35: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 DSP CIRCUIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 36: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 5 ADC CIRCUIT DIAGRAM ...

Page 37: ...UIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T 3 29 3 30 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 38: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 7 DECK CIRCUIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 39: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 8 AMP CIRCUIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 40: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 9 USB CIRCUIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 41: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 10 MIC CIRCUIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 42: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 11 KEY CIRCUIT DIAGRAM 2008 02 13 A 1 2 3 4 5 6 7 8 9 10 11 12 B C D E F G H I J K L M N O P Q R S T ...

Page 44: ...P PWM6_M IO_VSS IO_VSS PWM1_P PWM1_M OVERLOAD IO_VSS IO_VSS SSDIN1 EXT_MUTE DVDD IO_VDD DVDD SSDIN0 MSDIN3 SSDIN2 SSDIN3 IO_VSS IO_VDD MIC_SDIN PWM_SWL_P PWM_SWL_M PWM_HP_L_P PWM_HP_L_M PWM_HP_R_M IO_VSS PWM7_P PWM7_M PWM8_P PWM8_M EPD_ENA TEST_MODE2 TEST_MODE1 IO_VSS DMIX_LRCK DMIX_BCK DMIX_SDOUT DMIX_MCLK 98 99 100 96 97 93 94 95 91 92 85 86 87 88 89 90 83 84 81 82 71 72 73 74 75 61 62 63 64 65 ...

Page 45: ... Automatic Gain Limiter Main Volume Trim Volume Bass Manager EQ Down Mixer Mixer Mic Input Processor Input Mapper Sample Rate Converter Input Output MUX Host Interface I2 C SPI Serial Audio Output interface Output Mapper POP NR Crystal Oscillator XI N XOUT Name Pin NO Type Description Power and Ground PLL_AVDD 6 Analog Power PLL analog power supply PLL_AVSS 8 Analog Ground PLL analog ground PLL_DV...

Page 46: ...25 26 I O PCM serial data input of sub channel audio User can set this sub channel data input pins to PCM serial data output pins See the Control Register Description part Schmitt Trigger input MIC_MCLK 30 O Main clock for external microphone input A DC Clock frequency can be selected between 6 144MHz 12 288MHz and 24 576MHz MIC_BCK 31 I O PCM bit clock input output of external microphone Bit cloc...

Page 47: ...r input Internal pull down resistor CS I2C_AD2 83 I Chip selector CS for SPI mode or Slave Address 2 for I2C mode Schmitt Trigger input Internal pull down resistor Special Control Interface EXT_MUTE 27 I External mute control input Active High Assert ëHIGHí tomute audio output Internal pull down resistor OVERLOAD 76 I Power stage overload indication input Polarity is programmable Schmitt Trigger i...

Page 48: ...he internal burst counter and controls the output registers CKE Input Clock Enable CKE activates HIGH and deactivates LOW the CLK signal If CKE goes low synchronously with clock set up and hold time same as other inputs the internal clock is suspended from the next clock cycle and the state of output and burst address is frozen as long as the CKE remains low When both banks are in the idle state d...

Page 49: ... the bank designated by BS is switched to the idle state after the precharge operation CAS Input Column Address Strobe The CAS signal defines the operation commands in conjunction with the RAS and WE signals and is latched at the positive edges of CLK When RAS is held HIGH and CS is asserted LOW the column access is started by asserting CAS LOW Then the Read or Write command is selected by asserti...

Page 50: ...nd service purposes LGE Internal Use Only Modulator MCLK AINL LRCK SCLK SDTO DIF VCOM Clock Divider AINR AGND VA Decimation Filter Serial I O Interface Voltage Reference CKS1 DGND VD CKS2 Modulator Decimation Filter PDN CKS0 3 AK5358_AD CONVERTER PIN CONFIGURATION BLOCK DIAGRAM ...

Page 51: ...er S upplyPin 2 7 3 6V 8 DGND Digital Ground P in 9 S DTO O Audio Se rial Data OutputPin ìLî Out put atPower down m ode 10 LR CK I O OutputCha nnel Clock Pin ìLî Out put in Mast er Modeat Pow er downmode 11 MCLK I Maste r ClockInput Pin 12 S CLK I O Audio Se rial Data ClockPin ìLî Out put in Mast er Modeat Pow er downmode 13 P DN I Powe r Down Mode ResetPin ìHî Powe r up ìLî Power down Reset TheAK...

Page 52: ...etector State Contr ol Comm and Register VCC VSS WE BYTE CE OE STB STB DQ0ñDQ15 A 1 Sector Sw itc hes RY B Y RESET Data Latch Y Gating Cell M atrix Addr ess La t ch A0ñA18 A1 A15 A18 A14 A13 A12 A11 A10 A9 A8 NC NC WE RESET NC NC RY BY A17 A7 A6 A5 A4 A3 A2 1 16 2 3 4 5 6 7 8 17 18 19 20 21 22 23 24 9 10 11 12 13 14 15 A16 DQ2 BYTE VSS DQ15 A 1 DQ7 DQ14 DQ6 DQ13 DQ9 DQ1 DQ8 DQ0 OE VSS CE A0 DQ5 DQ...

Page 53: ... BST_B BST_C BST_D RESET_AB RESET_CD System Power Supply Hardwire Mode Control PVDD GVDD 12 V VDD 12 V GND Hardwire OC Limit M1 M3 PVDD Power Supply Decoupling 31 5 V 12 V GND VAC PWM_A PWM_C PWM_D PWM_B VALID M2 Left Channel Output Right Channel Output Input H Bridge 1 Input H Bridge 2 GVDD VDD VREG Power Supply Decoupling 4 4 4 Bootstrap Capacitors 2nd Order L C Output Filter for Each Half Bridg...

Page 54: ... PWM Rcv Overload Protection Isense GVDD_D RESET_CD 4 Protection and I O Logic PWM_C OUT_C GND_C PVDD_C BST_C Timing Gate Drive Ctrl PWM Rcv GVDD_C PWM_B OUT_B GND_B PVDD_B BST_B Timing Gate Drive Ctrl PWM Rcv GVDD_B PWM_A OUT_A GND_A PVDD_A BST_A Timing Gate Drive Ctrl PWM Rcv GVDD_A Ctrl BTL PBTL Configuration Pulldown Resistor BTL PBTL Configuration Pulldown Resistor BTL PBTL Configuration Pull...

Page 55: ...ectronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 6 BA3308_PRE AMPLIFIER BLOCK DIAGRAM Electrical characteristics unless otherwise noted Ta 25 C VCC 7 0V f 1kHz and BPF 20Hz to 20kHz ...

Page 56: ...eserved Only for training and service purposes LGE Internal Use Only 7 BU4052B_CMOS BLOCK DIAGRAM Y0 1 Y2 2 COMMON Y 3 Y3 4 Y1 5 INH 6 VEE 7 VSS 8 16 15 14 13 12 11 10 9 VDD X2 X1 X X0 X3 A B Y0 B Y OUT IN INH VEE X OUT IN A COMMON Y2 Y3 Y1 X2 X1 X0 X3 ...

Page 59: ...3 58 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 11 BU9543KV_MOTOR IC BLOCK DIAGRAM 12 S 24CS16A01_EEPROM IC BLOCK DIAGRAM ...

Page 60: ...VERTER 6 VA 4 999 V 7 VD 3 5 V IC301 KEYBOARD CONTROLLER 9 VCC 5 07 V IC200 IC201 PRE AMPLIFIER 6 VCC 5 68 V MAIN_CPA C109 4 93 V C111 4 9 V C116 4 9 V C201 8 61 V C206 1 566 V C207 1 572 V C639 1 923 V C645 1 919 V C647 3 472 V C665 1 924 V C690 0 019 V C703 14 96 V C707 11 99 V C725 11 97 V C741 14 96 V C803 2 492 V C805 2 49 V C810 1 37 V C810 0 V C811 11 61 V C825 5 99 V C827 0 V C836 9 11 V C...

Page 62: ...01 R120 R121 R123 R124 R126 R703 R704 R129 R707 R708 R709 R711 R136 R712 R138 P7403 R718 R719 C102 C103 C104 C105 C106 R144 C109 R721 R723 R724 R727 X100 X101 C111 C116 C117 C118 C119 R157 R158 R159 R6C9 R160 R161 R162 C703 R164 C705 C706 C707 C710 R172 C712 C715 C716 C717 R754 R178 R180 R181 C721 R182 C722 R183 C723 R184 C724 C725 C727 R189 C730 R190 C731 R191 C732 R192 C736 C737 C738 R199 C739 Z...

Page 63: ...C884 C690 C885 FB101 FB102 C886 FB103 C887 R100 R101 R102 R107 R109 R110 JK701 R122 R700 R701 R702 R705 R706 R710 R713 R716 R717 C101 C107 R720 C108 C109 R722 R725 R726 X100 C110 X101 C111 C112 C113 C114 C115 C116 C700 C701 C703 C704 TP1 R165 TP2 TP3 R167 C707 TP4 R168 C708 TP5 R169 TP6 TP7 TP8 TP9 R170 C711 C713 C714 R750 R176 R177 C718 R755 C719 R756 MICOM_RST C720 C725 C726 C728 C729 TP10 TP11 ...

Page 66: ...08 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 SMPS P C BOARD DIAGRAM NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock ...

Page 67: ...7 R3D8 R3D9 R3E1 CN3890 CN3891 Q301 PN3702 R331 R332 R333 R334 R335 R336 R337 R338 R339 C301 C302 C303 C304 C305 RMC301 C306 R343 C307 R344 C308 R345 C309 C310 C311 C312 C313 C314 R361 VR301 R362 R363 R364 C333 R377 R378 R379 C351 C352 C354 C355 C356 C357 C358 D301 D302 R3Z1 R3Z2 R3Z3 R3Z4 IC301 DIG301 07 11 23 MCD23 EAX42720001 W301 W302 W303 W304 W306 W307 W308 W310 W311 W312 W313 W314 W315 W316...

Page 68: ...1 MCD23 MCD23 2007 11 21 2007 11 21 W220 W221 R210 R211 R212 R213 R214 R215 R217 R218 R219 CN201 R221 R227 R230 R231 R233 R235 R236 R237 R238 R239 C200 C203 FB250 R240 C204 C205 FB253 C208 C209 R246 R247 C210 C212 C213 C214 R251 C216 C217 C218 R255 C219 R256 R260 R261 R262 R263 C227 R264 R265 R267 R268 R269 C231 C232 C233 C237 C238 R277 C241 R283 R285 C251 C254 C255 C258 C260 C262 C263 C264 C266 C...

Page 70: ... for training and service purposes LGE Internal Use Only SECTION4 DISASSEMBLYANDASSEMBLYOFMECHANISMDECK 4 1 Disassembly of Mechanism Deck Figure A 1 1 Separate the Loading FFC 2 Moving the Gear Loading toward the arrow direction open 3 Open the Tray Loading 3 1 2 ...

Page 72: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 2 3 Figure A 3 1 Release a screw 2 Lift toward the arrow direction 3 Separate the Tray Disc ...

Page 73: ...4 4 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 Figure A 4 1 To disassemble the Gear Tray Cam release a screw ...

Page 74: ...008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 1 1 3 2 3 Figure A 5 1 Release the screws 2 Draw the Loading FFC from the Hook holder 3 Take out the Motor wire ...

Page 75: ...4 6 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 Figure A 6 a 1 To down the Frame UD move the Gear Main like Figure A 6 a ...

Page 76: ...ight 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 2 Figure A 6 b 2 Release a screw 3 First push the Frame UD to leftward Lift it upward to disassemble ...

Page 77: ...ure A 7 1 Push the Hook and disassemble the Cover Belt 2 Disassemble the Gear Pu Down 3 Disassemble the Gear Pu Up 4 Disassemble the Gear Main 5 Disassemble the Gear Loading 6 Disassemble the Gear Pulley 7 Disassemble the Belt 8 Remove the Hook and disassemble the Motor 9 Turn the plate toward the arrow direction and disassemble the Clamp ...

Page 78: ...4 9 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 1 2 3 Figure A 8 1 Push the Hook 2 Pull the Guide UD 3 Lift the Guide UD up ...

Page 79: ...opyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 2 1 Figure A 9 1 Separate the FFC from the Guide part 2 Release a screw and disassemble the PCB ...

Page 80: ...ht reserved Only for training and service purposes LGE Internal Use Only 4 2 Assembly of Mechanism Deck Figure B 1 Guide UD assembly 1 Fix part of the Guide UD to part of the Base Main 2 Move the Guide UD toward the arrow direction from below 1 3 2 ...

Page 81: ...reserved Only for training and service purposes LGE Internal Use Only Figure B 2 Frame UD assembly 1 Insert part of Frame UD into the Guide part of the Guide UD 2 Fix the right Boss of the Frame UD to the Base Main 3 Turn the screw to the right 3 2 1 ...

Page 82: ...ectronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Figure B 3 The Initial Mode of the Base Main assembly 1 Assemble the Tray Loading Assy on the state of the Gear Main like Figure B 3 ...

Page 83: ...served Only for training and service purposes LGE Internal Use Only Figure B 4 Tray Loading Motor assembly 1 Insert the Motor Assy into the hole of the Tray Loading 2 To prevent the turning of the Motor Assy turn it to the left and check out holding 1 2 ...

Page 84: ...nics Inc All right reserved Only for training and service purposes LGE Internal Use Only Figure B 5 a Tray Disc Assembly 1 When assemble the Gear Tray Cam fix hole like Figure B 5 a the state that assemble the Tray Disc easily a 1 a ...

Page 85: ...right 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only Figure B 5 b 1 Insert the Tray Disc 2 Check the Tray Disc holding 3 Turn the screw to the right 3 2 1 ...

Page 86: ... right reserved Only for training and service purposes LGE Internal Use Only Figure B 6 a The Final Assembly 1 Put the Loading FFC down through the square hole of the Base Main 2 Push the Tray Loading with a hand softly until heard the hook 1 2 ...

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