LG CM2630B Service Manual Download Page 28 | Manualshive

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3-9

ELECTRICAL TROUBLESHOOTING GUIDE

5. TOUCH PART CHECK

YES

YES

YES

Touch part check

OK

Check the FFC cable.

Replace IC301.

Check TOUCH_IRQ signal(IC301 pin5).

When you touch pad, it’s “Low”.

When you non-touch pad, it’s “high”.

Check and replace gasket

on front panel.

NO

NO

NO

IC301 Pin24

voltage 3.3 V OK?

TOUCH_DAT,

CLK signal OK?

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Summary of Contents for CM2630B

Page 1: ...AL MODEL CM2630B CM2630B CMS2630FH CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL CM2630B CM2630B CMS2630FH SERVICE MANUAL P NO AFN76015290 MAY 2013 Website http biz lgservice com Internal Use Only ...

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST 1 1 ...

Page 3: ...RVICING PRECAUTIONS 1 3 ESD PRECAUTIONS 1 5 MICOM HIDDEN KEY MODE 1 6 SERVICE INFORMATION FOR EEPROM 1 7 PROGRAM DOWNLOAD GUIDE 1 8 1 AUDIO PROGRAM 1 8 2 CD PROGRAM 1 9 3 TOUCH PROGRAM 1 10 4 EQ PROGRAM 1 11 SPECIFICATIONS 1 12 1 2 ...

Page 4: ... 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 cleaning the lens surface therefore a cotton swab...

Page 5: ...eplacing 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 possibility of damage by static electricity 4 To prevent AC...

Page 6: ... 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 foam aluminum foil or comparable conductive materia...

Page 7: ... POWER ON STATUS Front Stop RMC for 5s auto exit E2P CLEAR EEPROM initialization EEPROM EDIT POWER ON STATUS Front Stop RMC for 5s Toggling OP0 10 Edit Micom option Disc Lock POWER ON STATUS Front Stop RMC Stop for 5s Toggling LOCKED UNLOCKED Disc Lock On Off Tuner Test POWER ON STATUS Front Stop RMC Info for 5s Toggling RXX SYYx XX RSSI YY SNR APD Test Display POWER ON STATUS Front Stop RMC 3 for...

Page 8: ...position and make changes with RMC X REPEAT key Press STOP key FLD WRITE OK Front STOP Remote control push same timing FLD E2P CLR Completed NAME OPT 0 OPT 1 OPT 2 OPT 3 OPT 4 OPT 5 OPT 6 OPT 7 OPT 8 OPT 9 DETECT NEW EEPROM OPTION EDIT SCREEN HEX 09 00 00 00 00 81 81 50 00 00 1 7 SERVICE INFORMATION FOR EEPROM ...

Page 9: ...wnload 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 VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH FIRMWARE WRITE 00 100 UPDATED POWER OFF AUTOMATICALLY When completed remove USB device 1 8 PROGRAM DOW...

Page 10: ...curity 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 VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH FIRMWARE FINISH POWER OFF MANUALLY When completed remove USB device 1 9 ...

Page 11: ...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 VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH FIRMWARE T WRT 00 100 UPDATED POWER OFF AUTOMATICALLY When completed remove USB device...

Page 12: ... 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 VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH EQ DOWN POWER OFF AUTOMATICALLY When completed remove USB device 1 11 ...

Page 13: ... 500 mA INPUTS PORT IN 0 5 Vrms 3 5 mm stereo jack TUNER FM Tuning Range 87 5 MHz to 108 0 MHz or 87 50 MHz to 108 00 MHz AMPLIFIER Stereo mode 80 W 80 W T H D 10 CD Frequency Response 30 to 20000 Hz Signal to noise ratio 80 dB Dynamic range 80 dB SPEAKERS Type 3 Way 4 Speaker Impedance 4 Ω Rated Input Power 80 W Max Input Power 160 W Net Dimensions WxHxD 132 x 286 x 304 mm Net Weight 1EA 4 kg Des...

Page 14: ...IN CHASSIS CONTENTS DISASSEMBLY INSTRUCTIONS 2 2 1 SIDE CASE PART 2 2 EXPLODED VIEWS 2 3 1 CABINET AND MAIN FRAME SECTION 2 3 2 DECK MECHANISM SECTION SDM 01BA 2 5 3 PACKING ACCESSORY SECTION 2 7 4 SPEAKER SECTION 2 8 2 1 ...

Page 15: ...2 2 1 Remove the Screws 4EA 2 Pull the Side Case from the rear of the Main Chassis 3 Remove the Side Case to move from side to side DISASSEMBLY INSTRUCTIONS Figure 1 Figure 3 Figure 2 1 SIDE CASE PART ...

Page 16: ...62 260 252 462 252 250 462 251 A41 465 261 465 462 A42 256 256 257 462 462 258 253 A43 300 462 262 A46 A47 B CABLE3 270 B 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 ...

Page 17: ...ISM SECTION SDM 01BA 1049 1437 1024 1024 1438 A002 1006 1437 1437 1024 1437 A006 1439 1021 1024 1030 1013 1014 1012 1009 1016 1017 1007 1011 1020 1002 1004 1005 1001 1003 1435 A001 A004 1436 1015 A005 1008 A003 MEMO ...

Page 18: ...2 7 801 Owner s manual 825 FM Antenna 803 Packing 802 Box 803T Packing 804A Bag 803B Packing Remote Control 900 Battery 808 Bag 804 3 PACKING ACCESSORY SECTION ...

Page 19: ...2 8 A60L A60R 4 SPEAKER SECTION ...

Page 20: ...4 WAVEFORMS 3 15 1 SERVO 3 15 2 MOTOR DRIVE 3 16 3 AUDIO PATH 3 17 4 ADC 3 19 5 USB 3 20 6 CRYSTAL 3 21 WIRING DIAGRAM 3 23 BLOCK DIAGRAM 3 25 CIRCUIT DIAGRAMS 3 27 1 SMPS CIRCUIT DIAGRAM 3 27 2 MAIN MICOM CIRCUIT DIAGRAM 3 29 3 MAIN MPEG CIRCUIT DIAGRAM 3 31 4 MAIN RF SERVO CIRCUIT DIAGRAM 3 33 5 MAIN I O ADC CIRCUIT DIAGRAM 3 35 6 MAIN PWM AMP CIRCUIT DIAGRAM 3 37 7 MAIN DC DC CIRCUIT DIAGRAM 3 ...

Page 21: ...oot Countermeasure 1 Check X100 Crystal If it does not oscillate change X100 2 Check IC103 Reset IC If its output voltage is not more than 2 7 V change IC103 3 Check IC101 Micom After power is on if the pin8 of IC101 is not High change IC101 But the new μ com IC need to write program 1 3 Service hint Any picture Remark IC101 IC103 X100 MAIN board top view ...

Page 22: ... driving the gate of IC700 AMP IC a If 12 V is low there is possible for AMP IC to be damaged b Remove bead among L700 L703 When removed bead if 12 V is recovered the IC connected to it was damaged c Replace the IC with a new one 2 Check the impedance between AMP PWM output GND a If the impedance is about 0 Ω the IC must be damaged b Replace it with a new one AMP IC 2 3 Service hint Any picture Re...

Page 23: ...sure 1 Please check Harness connection between Main CN103 and Top CN370 BD 2 If it is OK please check two ICs below 3 Please check IC902 of Main BD Pin2 12 V L907 5 6 V 4 Please check IC362 of TOP BD Pin2 5 6 V Pin3 5 V 5 If it is not OK replace IC902 or IC362 3 3 Service hint Any picture Remark IC902 IC362 MAIN board top view TOP board top view ...

Page 24: ...it will not boot up normally 4 1 Solution Replace X500 4 2 How to troubleshoot Countermeasure 1 Please check the soldering status of 12 MHz crystal X500 2 Please check the frequency of 12 MHz crystal X500 3 If the crystal doesn t oscillate replace X500 4 After changing it if the set is still not booting replace MAIN board assembly 4 3 Service hint Any picture Remark X500 MAIN board top view ...

Page 25: ...n Replace SMPS BD Replace D906 D907 D911 Detach harness of CN901 Replace IC907 Check If PVDD voltage of CN901on Main BD is 25 26 V NO NO NO Check If PVDD voltage of CN901 on SMPS BD is 25 26 V Check If D906 D907 D911 voltage drop on Main BD is 0 6 0 7 V YES YES YES YES ...

Page 26: ...peration X100 12 MHz X101 32 768 kHz Replace D100 D101 NO Check if output of D100 D101 is 3 3 V μ com part check 1 Replace IC101 Check the periphery of IC907 Replace D102 or IC100 Replace IC907 NO NO Check Pin1 Pin3 of IC100 3 7 V Check Voltage of IC101 Pin49 3 7 VA Check end voltage of IC907 3 7 VA NO NO YES YES YES 2 μ COM PART CHECK 1 OK ...

Page 27: ...C341 of VFD Ass y BD Replace D903 or F901 Check D902 F902 D913 D914 ZD901 ZD902 and replace related part Connect FFC cable right NO NO NO Check if voltage between FL and FL is 3 4 4 2 V Check if VKK is 30 28 V Check if FFC connection is good Check if VFD light on NO YES YES YES YES OK ...

Page 28: ...S YES YES Touch part check OK Check the FFC cable Replace IC301 Check TOUCH_IRQ signal IC301 pin5 When you touch pad it s Low When you non touch pad it s high Check and replace gasket on front panel NO NO NO IC301 Pin24 voltage 3 3 V OK TOUCH_DAT CLK signal OK ...

Page 29: ...ce IC602 Replace the coil Replace IC700 Check IC202 Pin1 19 If it s no output replace IC202 Check IC202 output If it s no output replace IC202 Check IC700 Pin1 22 12 V input Check IC700 PWM input Pin5 6 14 15 Check output line coil Check IC700 PWM output Pin27 28 32 35 39 40 Check IC202 I2S input Pin13 15 17 Check IC602 I2S input Pin22 23 24 NO NO NO NO NO NO Check IC700 Pin29 31 Pin36 38 25 26 V ...

Page 30: ...YES YES YES Tuner function check OK Check tuner module voltage Pin6 3 3 V Check or replace IC200 Replace IC501 Check IC200 CS5346 _Pin41 42 43 44 output waveform Replace the module Check IC501 I2S data Pin81 85 86 NO NO NO Check tuner module TU100 operation Waveform OK ...

Page 31: ...ss connection if it OK replace L201 L202 Check FFC connection if it OK replace L520 NO NO Check if Pin1 and Pin2 of CN201 is 1 2 V and 3 3 V Check if Pin1 of CN500 is 3 3 V Check if DAB module operates good Check if BT module operates good NO NO YES YES YES YES OK OK 8 DAB FUNCTION CHECK OPTIONAL 9 BLUETOOTH FUNCTION CHECK OPTIONAL ...

Page 32: ...nction check Check USB Jack CN365 Display READ Check USB audio file in USB device MP3 WMA file is playable Check IC362 Replace IC501 Check USB_5 V Check IC501 Pin117 118 Display NO FILE Plug in USB device Display NO USB NO NO NO NO Check USB D L515 YES YES YES YES YES ...

Page 33: ...e PD CN402 Pin2 about 180 mV Is motor impedance OK About 12 Ω Is no signal at SPK Check IC402 Check OPU Pick up module Check loading motor Can the DISC insert DISC reading is OK Can t see the signal at Pin34 35 36 of IC400 Check IC500 Input Output and control line Can t see the signal 16 9344 MHz at Pin31 of IC400 NO NO NO NO NO NO NO NO NO NO Is LOAD OK Focusing Tracking Sled signal is OK YES YES...

Page 34: ...3 15 WAVEFORMS 1 SERVO Figure 1 1 CD 16M IC400 Pin31 Figure 1 2 SERVO WAVEFORM FE TE FOD RF IC400 Pin61 62 63 IC401 Pin1 FE TE FOD RF 1 4 5 3 2 2 4 5 3 1 ...

Page 35: ...3 16 2 MOTOR DRIVE Figure 2 1 SP SP FOR DRIVING SPINDLE MOTOR IC401 Pin17 18 Figure 2 2 SL SL FOR DRIVING SPINDLE MOTOR IC401 Pin11 12 SP SP SL SL 6 7 8 9 8 9 6 7 ...

Page 36: ...3 17 3 AUDIO PATH Figure 3 1 CD_I2S IC400 Pin34 35 36 Figure 3 2 IC501 Pin81 85 86 BCK BCK LRCK LRCK DATA DATA 12 10 11 14 15 13 10 11 12 13 14 15 ...

Page 37: ...3 18 Figure 3 3 IC602 Pin22 23 24 Figure 3 4 AUDIO_L R BCK AUDIO_L AUDIO_R LRCK DATA 16 17 18 16 17 18 ...

Page 38: ...3 19 4 ADC Figure 4 1 ADC I2C IC200 Pin1 2 Figure 4 2 ADC I2S IC200 Pin41 42 43 44 MCK CLK BCK LRCK DATA DATA 21 23 24 22 19 20 19 20 21 22 23 24 ...

Page 39: ...3 20 5 USB Figure 5 1 USB D D IC501 Pin117 118 D D 26 25 25 26 ...

Page 40: ...3 21 6 CRYSTAL Figure 6 1 12 MHZ CRYSTAL IC101 Pin57 58 XI XO 27 28 27 28 ...

Page 41: ...3 22 MEMO ...

Page 42: ...CK UP MD FAN DIP 6P S TOUCH FR 1 Silver SMD 6P A SMD 6P S SMD 10P A SMD 10P S SMD 15P S SMD 15P A DAB SMD 9P S DIP 2P S 12505WS 0900 99990986 10031HR H10 10031HR H6 04 6232 010 010 801 04 6232 023 010 000 04 6232 010 010 801 JE500 B1 0 T06 12505WS 15A00 SMW250 06P 12505WR 15 BLUETOOTH SMD 8P A SMD 8P S WIRING DIAGRAM ...

Page 43: ...kHz I2C 3 wire OQFWNG 3 3 1 2 V 3 3 V DAB L R 3 3 V 3 3 V 3 3 V 12 288 MHz 3 3 V mvj zVzslk zwpukslV yhjrpun hSGiSGjSGkSGlSGm 127 QVQT 5 i Zr G wk sk mRVTSG RVT zslkRVT zwpukslRVT B 1B287 5 6 7 68 6 4 86 5 B0 B 7 5 vwluVjsvzl 5 V 3 3 V 1 8 V CLK DAT RST 8 TKXGT IR TOUCH KEY 8 EA SPI 6QWEJ 6 I2C 3 3 V Vkk FL FL Key_0 3 3 V 70 6 10 LED 5 EA PVDD 26 V GVDD 12 V 670 4 74AHC244 SWITCH Interface DAC_MCL...

Page 44: ... PERMISSION FROM THE LG CORPORATION ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SER...

Page 45: ...3 29 3 30 27 28 WAVEFORM NUMBER 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 MICOM EAX65084901_7_1 5 SD_MAIN 2 2013 02 06 2 MAIN MICOM CIRCUIT DIAGRAM ...

Page 46: ...3 31 3 32 14 15 13 26 25 WAVEFORM NUMBER 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 MPEG EAX65084901_7_1 5 SD_MAIN 3 2013 02 06 3 MAIN MPEG CIRCUIT DIAGRAM ...

Page 47: ...3 33 3 34 5 3 2 12 10 11 1 6 7 4 8 9 WAVEFORM NUMBER 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 RF SERVO EAX65069601_5_1 5 SD_MAIN 4 2013 02 06 4 MAIN RF SERVO CIRCUIT DIAGRAM ...

Page 48: ...3 35 3 36 21 23 24 22 19 20 WAVEFORM NUMBER 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 I O ADC EAX65084901_7_1 5 SD_MAIN 5 2013 02 06 5 MAIN I O ADC CIRCUIT DIAGRAM ...

Page 49: ...3 37 3 38 16 17 18 WAVEFORM NUMBER 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 PWM AMP EAX65084901_7_1 5 SD_MAIN 6 2013 02 06 6 MAIN PWM AMP CIRCUIT DIAGRAM ...

Page 50: ...3 39 3 40 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 DC DC EAX65084901_7_1 5 SD_MAIN 7 2013 02 06 7 MAIN DC DC CIRCUIT DIAGRAM ...

Page 51: ...3 41 3 42 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 VFD EAX65140601_3_1 2 SD 2013 02 06 8 VFD CIRCUIT DIAGRAM ...

Page 52: ...3 43 3 44 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 TOUCH EAX65140501_3_1 2 SD 2013 02 06 9 TOUCH CIRCUIT DIAGRAM ...

Page 53: ...3 45 3 46 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 TOP JACK EAX65140401_3_1 2 SD 2013 02 06 10 TOP JACK CIRCUIT DIAGRAM ...

Page 54: ... 6 3 25 IC503 IC SDRAM W9864G6JH 6 64MBIT 1 3 9 14 27 43 49 DVCC 3 3V 3 0 3 6 3 24 IC504 IC I O Support Chip 337S3959 Clsas 6 i Pod 2 0C 8PIN DVCC 3 3V 1 6 5 5 3 23 IC505 IC Voltage Regulator AZ1117BH ADJTRE1 15V ADJ 0W SOT223 R TP 3P BCD 3 PIN DVCC 3 3V 15 00 3 33 2 PIN VCC_1 2V 15 00 1 21 IC602 PWM TAS5548 14 35 50 PIN AVCC_3 3V 3 3 6 3 33 IC700 IC Audio Amplifier TAS5612LA 125 W Class D 2 PIN V...

Page 55: ...p 4 7uF 50V 25 40 TOP JACK Board C377 Capacitor AL Chip 10uF 16V 5 10 VFD Board C346 Capacitor AL Chip 100uF 16V 3 43 C349 Capacitor AL Chip 47uF 50V 28 5 C350 Capacitor AL Chip 47uF 50V 21 5 C353 Capacitor AL Chip 47uF 50V 25 5 C354 Capacitor AL Chip 47uF 16V 3 34 2 CAPACITORS 3 CONNECTORS LOCATION PIN NUMBER SPEC REAL VOLTAGE LOCATION PIN NUMBER SPEC REAL VOLTAGE MAIN Board SMPS Board CN901 1 2 ...

Page 56: ...3 51 3 52 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW BOTTOM VIEW NOTE Warning Parts that are critical with respect to risk of fire or electrical shock ...

Page 57: ...3 53 3 54 2 MAIN P C BOARD TOP VIEW ...

Page 58: ...3 55 3 56 MAIN P C BOARD BOTTOM VIEW ...

Page 59: ...3 57 3 58 3 VFD TOUCH TOP JACK P C BOARD TOP VIEW ...

Page 60: ...3 59 3 60 VFD TOUCH TOP JACK P C BOARD BOTTOM VIEW ...

Page 61: ...3 61 3 62 MEMO MEMO ...

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