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LG LM-D2540A, Manual

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LG LM-D2540A Manual Download Page 25

2-29

2-30

❏

PRINTED CIRCUIT DIAGRAMS

• MAIN P.C. BOARD (SOLDER SIDE)

Summary of Contents for LM-D2540A

Page 1: ...NTED CIRCUIT BOARD DIAGRAM 2 29 SECTION 3 DVD PART DVD ELECTRICAL TROUBLESHOOTING GUIDE 3 1 INTERNAL BLOCK DIAGRAM of ICs 3 7 SCHEMATIC DIAGRAM 3 27 PRINTED CIRCUIT BOARD DIAGRAM 3 33 SECTION 4 EXPLODED VIEWS CABINET AND MAIN FRAME SECTION 4 1 TAPE DECK MECHANISM A R A S LEFT A S DECK 4 5 TAPE DECK MECHANISM A R A S RIGHT A R DECK 4 7 SECTION 5 SPEAKER PART 5 1 SECTION 6 REPLACEMENT PARTS LIST 6 1...

Page 2: ...ver 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 cleaning t...

Page 3: ...tive 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 should be grounded 5 Workers should be grounded by an armband 1M Ω 6 Care should be taken not to permit the laser pick up to come in contact with clothing in order to prevent sta tic electricity changes in the clothing to...

Page 4: ...harges 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 foam aluminum foil or comparabl...

Page 5: ... 1 6 ...

Page 6: ... check ZD900 voltage check 5 1V IC301 PIN26 check ZD901 33V check D901 waveform check D901 replacement R902 check ZD900 replacement Q902 TURN ON check C919 33V up to check D908 D909 replacement Troubleshooting check Q902 replacement normal TROUBLESHOOTING GUIDE YES YES NO NO NO YES YES YES YES NO NO NO ...

Page 7: ...YES YES YES YES YES YES NO NO NO NO NO NO NO CN901 PIN3 6 2V D power check D913 AC voltage input check IC902 7812 assemble check replacement Transformer replacement CN901 PIN6 7 DC 16V up to power check CN901 PIN5 12V D power check IC901 7805 assemble check replacement YES YES YES NO NO NO NO CN901 PIN4 12V A power check CN901 PIN6 7 DC 16V over power check D901 AC voltage input check IC301 PIN76 ...

Page 8: ...5 12V D power check IC904 78R08 check replacement D913 AC voltage input check IC902 7812 assemblecheck replacement Transformerreplacement CN901 PIN12 5V power check IC901PIN10DC 8Voverpowercheck IC905 78R05 power check D902 D903 AC power input check YES YES YES YES NO NO NO NO NO CN901 PIN14 3 3V power check OK CN901 PIN10 DC 8V over power check IC907 7805 IC906 78R33 power check D902 D903ACpoweri...

Page 9: ...R MUTE HIGH check Q741 C PORT HIGH check Q740 C PORT signal check Q740 replacement Q700 Q750 replacement Muting mode check IC301 replacement Q791 E PORT HIGH check Q791 replacement normal normal Muting mode check IC301 replacement Q741 E PORT HIGH check Q741 replacement PATTERN check PATTERN check YES YES YES YES YES YES YES NO NO NO NO NO NO ...

Page 10: ... replacement IC601 input check IC602 replacement IC601 replacement IC605 replacement Q1725TURN ONcheck Speaker short check OK Q1720 B DC voltage check IC700 replacement 12V A powerTroubleshooting refer IC605 input check each function TROU BLESHOOTING refer no sound YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO ...

Page 11: ...input check Front L R IC602 PIN2 19 input check FRONT L R IC700 replacement IC602 replacement JK600 AUX input signal cable or external component sound output check IC601 PIN4 25 input check IN L R IC605 PIN4 11 input check IC202 PIN5 20 output check TAPE L R IC605 replacement IC601 replacement IC601 PIN5 24 input check IN L R IC601 replacement Specific FUNCTION MODE has no sound YES YES YES YES YE...

Page 12: ... R R L R CNT PATTERN check DVD Troubleshooting refer TUNER FUNCTION SPEAKER output OK IC602 PIN2 19 input check FRONT L R IC602 replacement IC601 replacement TUN100 PIN2 VCC 9V check TUN100 PLL CE CLK DI DO ter minal DATA correspondence check IC601 PIN4 25 input check FRONT L R IC605 PIN3 5 input check TUNER L R Pattern check Power 12V A check YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO ...

Page 13: ...N check Troubleshooting Refer P SENS refer X301 replacement RESET circuit check YES YES YES YES YES NO NO NO NO NO IC501 EXPENDER IC Troubleshooting IC501 PIN16 5V power check IC501 PIN2 3 pin CLK Data check CONTROLL function check normal Troubleshooting Refer IC301 TROUBLESHOOTING refer IC301 IC501 pattern check IC301 PIN3 4 Data check CD TAPE FUNCTION change IC501 BU2090F replacement YES YES YES...

Page 14: ...eck OK Muting circuit refer PIN3 4 5 6 DC check Power IC replacement Power IC replacement YES YES YES YES NO NO TAPE PLAY IC202 18 pinVCC check IC202 5 20 pin signal output check Muting circuit check Troubleshooting check refer Deck Mecha operation check IC202 replaement Deck Mecha replaement YES YES YES NO NO NO ...

Page 15: ...laement IC202 PIN18 VCC check IC501 Troubleshooting check C236 power input check Troubleshooting check refer IC501 Troubleshooting check Q208 replaement L203 replaement Q208 Base 0 6V check Q208 Collector Low Q207 replaement normal YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO NO Dubbing check NORMAL or HIGH check Q252 202 OFF ON R273 223 LOW HIGH Q253 203 OFF ON R225 275 LOW HIGH IC...

Page 16: ... BLOCK DIAGRAM 2 11 2 12 ...

Page 17: ...2 13 2 14 SCHEMATIC DIAGRAMS MAIN SCHEMATIC DIAGRAM ...

Page 18: ...2 15 2 16 MAIN AMP SUB POWER SCHEMATIC DIAGRAM ...

Page 19: ...2 17 2 18 MAIN DECK SCHEMATIC DIAGRAM ...

Page 20: ...2 19 2 20 FRONT SCHEMATIC DIAGRAM ...

Page 21: ...2 21 2 22 MIC SCHEMATIC DIAGRAM ...

Page 22: ...2 23 2 24 POWER A V JACK SCHEMATIC DIAGRAM ...

Page 23: ...2 25 2 26 POWER A V JACK SCHEMATIC DIAGRAM ...

Page 24: ...2 27 2 28 WIRING DIAGRAM ...

Page 25: ...2 29 2 30 PRINTED CIRCUIT DIAGRAMS MAIN P C BOARD SOLDER SIDE ...

Page 26: ...2 31 2 32 MAIN P C BOARD COMPONENT SIDE ...

Page 27: ...2 33 2 34 FRONT P C BOARD SOLDER SIDE ...

Page 28: ...2 35 2 36 FRONT P C BOARD COMPONENT SIDE ...

Page 29: ...2 37 2 38 POWER P C BOARD COMPONENT SIDE ...

Page 30: ...2 39 2 40 POWER P C BOARD SOLDER SIDE ...

Page 31: ...2 41 2 42 POWER P C BOARD SOLDER SIDE POWER P C BOARD COMPONENT SIDE FAN ZIG P C BOARD DOUBLE VOLTAGE P C BOARD ...

Page 32: ...2 43 2 44 A V JACK P C BOARD SOLDER SIDE A V JACK P C BOARD COMPONENT SIDE ...

Page 33: ...2 45 2 46 ...

Page 34: ... 3 1 SECTION 3 DVD PART DVD ELECTRICAL TROUBLESHOOTING GUIDE 1 Power check flow ...

Page 35: ... 3 2 2 Test debug flow ...

Page 36: ... 3 3 ...

Page 37: ... 3 4 ...

Page 38: ... 3 5 ...

Page 39: ... 3 6 ...

Page 40: ... 3 7 INTERNAL BLOCK DIAGRAM of ICs ES6603 IC401 BLOCK DIAGRAM ...

Page 41: ... 3 8 ...

Page 42: ... 3 9 ...

Page 43: ... 3 10 ...

Page 44: ... 3 11 BA5954FM IC404 BLOCK DIAGRAM ...

Page 45: ... 3 12 ES6698 IC501 BLOCK DIAGRAM ...

Page 46: ... 3 13 ...

Page 47: ... 3 14 ...

Page 48: ... 3 15 ...

Page 49: ... 3 16 ...

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Page 54: ... 3 21 ...

Page 55: ... 3 22 DVD BLOCK DIAGRAM ESS 3 CHANGER SYSTEM BLOCK DIAGRAM ...

Page 56: ... 3 23 ESS 3 CHANGER MEMORY HOST I F BLOCK DIAGRAM ...

Page 57: ... 3 24 ESS 3 CHANGER SERVO MOTOR BLOCK DIAGRAM ...

Page 58: ... 3 25 ESS 3 CHANGER A V SYSTEM BLOCK DIAGRAM ...

Page 59: ...N TRAY LOADING GEAR CAM H GEAR PU DOWN H 1 How to open the tray Push two hooks H of the BASE MAIN and open the TRAY LOADING 2 How to correct the distorted gears 1 Turn GEAR MAIN until it clicks if so that PICK UP is downed completely 2 The hold of GEAR FU DOWN array as the arrow of BASENAIN 3 Push the TRAY LOADING ...

Page 60: ...3 27 3 28 SCHEMATIC DIAGRAMS MPEG SCHEMATIC DIAGRAM ...

Page 61: ...3 29 3 30 RF SERVO SCHEMATIC DIAGRAM ...

Page 62: ...3 31 3 32 I O SCHEMATIC DIAGRAM ...

Page 63: ...3 33 3 34 PRINTED CIRCUIT DIAGRAMS MAIN P C BOARD SOLDER SIDE ...

Page 64: ...3 35 3 36 MAIN P C BOARD COMPONENT SIDE ...

Page 65: ...S 458 302 458 A46 301 A47 A48 300 305 291 457 292 278 277 454 276 275 FAN 456 272 454 A41 271 A26 A00 A43 264 459 A50 263 454 262 261 260 265 259 256 255 257 258 252 266 451 270 250 251 253 254 290 454 CABINET AND MAIN FRAME SECTION ...

Page 66: ...2 019 6768R SP01P DECK MECHANISM PARTS 01 081 4678 PIGEON SPRING CRL4 020 6768R BP01C DECK MECHANISM PARTS 02 083 4188 PIGEON BELT FELT C 021 6768R LP01C DECK MECHANISM PARTS 50 223 4429 PIGEON PULLEY FLYW 022 6768R VP03A DECK MECHANISM PARTS 50 093 4748 PIGEON SOLENOID AS 023 6768R GP03A DECK MECHANISM PARTS 50 093 4810 PIGEON GEAR ASSY C 025 6768R JP03B DECK MECHANISM PARTS 50 093 31009 PIGEON P...

Page 67: ... DECK MECHANISM PARTS 50 093 4748 PIGEON SOLENOID AS 023 6768R GP03A DECK MECHANISM PARTS 50 093 4810 PIGEON GEAR ASSY C 025 6768R JP03B DECK MECHANISM PARTS 50 093 31009 PIGEON PULLEY FLY 026 6768R SP01D DECK MECHANISM PARTS 01 080 4609 PIGEON SPRING CWL4 027 6768R DP01A DECK MECHANISM PARTS 50 259 3342 PIGEON LEVER CWL44 028 6768R RP01A DECK MECHANISM PARTS 22 027 41054 PIGEON ROLLER CWL 029 676...

Page 68: ...IO MAIN CDM H1303 163 4470SB0003A GEAR PULLEY CDM H1303 164 4470RB0003A GEAR LOADING CDM H1503 165 6871RZ7036A PWB PCB ASSEMBLY OTHERS CDM H1503 UP DW OP CL 166 4470RB0006A GEAR PU UP CDM H1503 167 4470RB0007A GEAR PU DOWN CDM H1503 168 4470RB0002A GEAR CAM CDM H1503 170 3300R 0547A PLATE CLAMP 171 5016H 1016B MAGNET CLAMP LDM R608 10 5 1 1 5T 172 3040RB0005A BASE MAIN CDM H1503 173 4510RB0001A LE...

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Page 70: ...L FE 376E PIEZO LG 0OHM 0W 0DB 834 353M025F SCREW DRAWING TAPTITE 3X8 FZMY 835 6400TSMA02A SPEAKER TWEETER CTR 50B55L SAMMI TWEETER CONE 836 353M050M SCREW DRAWING 2 D3 5 L10 0 MSWR3 FZY 837 6400WSMJ07A SPEAKER WOOFER CW 165B55L SAMMI WOOFER 6OHM 5 839 4350RM0013A RING SPK LMS D6540V MOLD WOOFER RIN 840 4766RM0158A FELT LMS D6540V BLACK FOR DUCT1 841 4766RM0159A FELT LMS D6540V BLACK FOR DUCT2 842...

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