LG LM-M1030A, Service Manual

Page 1: ...3CD CHANGER HI FI SYSTEM SERVICE MANUAL MODEL LM M1030A D X LMS M1030 SERVICE MANUAL MODEL LM M1030A D X LMS M1030 REVISION ...

Page 2: ... BLOCK DIAGRAM 2 27 SCHEMATIC DIAGRAMS 2 29 WIRING DIAGRAM 2 37 PRINTED CIRCUIT DIARGAMS 2 39 INTERNAL BLOCK DIAGRAM OF IC s 2 49 REPAIRS REGARDING CD MECHANISM 2 58 SECTION 3 EXPLODED VIEWS CABINET AND MAIN FRAME SECTION 3 1 TAPE DECK MECHANISM AUTO STOP DECK OPTIONAL 3 3 TAPE DECK MECHANISM AUTO REVERSE DECK 3 5 CD MECHANISM 3 7 SECTION 4 SPEAKER 4 1 SECTION 5 REPLACEMENT PARTS LIST 5 1 ...

Page 3: ... 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 the lens surface theref...

Page 4: ... 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 1MΩ 6 Care should be taken not to permit the laser pick up to come in contact with clothing in order to prevent static electricity changes in the clothing to escap...

Page 5: ...es 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 comparable co...

Page 6: ... 1 5 SPECIFICATIONS LM M1030A D X LMS M1030 ...

Page 7: ... 1 6 MEMO ...

Page 8: ...d 3 Turn volume control to minimum unless otherwise noted 4 Connect low side of signal source and output indicator to chassis ground unless otherwise specified 5 Keep the signal input as low as possible to avoid AGC and AC action Deck Mode Test Tape Test Point Adjustment Adjust for A Deck Playback MTT 114 Speaker Out DECK Screw Maximum Azimuth Screw B Deck Playback MTT 114 Speaker Out Azimuth Scre...

Page 9: ...head Test Tape MTT 5511 Record Playback and Pause Mode Frequency Counter Deck Mode Test Tape Test Point Adjustment Adjust for Rec Pause MTT 5511 ERASE HEAD L203 60kHz 5kHz Auto stop WIRE PN202 85kHz 5kHz Auto Reverse Figure 3 Record Bias Adjustment Connection Diagram ...

Page 10: ...K MICOM INTERFACE CIRCUIT PN807 CONNECTOR CHECK PN801 PN802 CHECK PICKUP MOVEMENT CHECK BA5810FP IC803 CHECK MN6627933CG IC801 CHECK AN22004 IC802 CONNECTOR CHECK PN808 CONNECTOR CHECK PN808 PN807 PN802 PN801 OPEN CLOSE CHECK READING DISPLAY CHECK READING OK CHECK IF PLAY AUDIO OUTPUT CHECK OK NO NO NO NO YES YES YES YES YES CD PART ...

Page 11: ...M DEFECTIVE IC803 DEFECTIVE MECHANISM CHECK POWER SUPPLY CIRCUIT PN808 PN807 PN808 PIN 5 6 2V PIN 7 5V PN807 PIN 1 5V CHECK VOLTAGE CHANGE OF OPEN CLOSE AND BTLMUTE VOLTAGE 5V PN807 PIN 20 OPEN 19 CLOSE 4 BTLMUTE CHECK VOLTAGE CHANGE LO LO OF IC803 PN807 PIN OPEN 20 CLOSE 19 YES YES YES NO NO NO NO ...

Page 12: ...IVE IC801 CHECK VOLTAGE THE PIN 2 OF IC805 IC805 PIN2 3 3V CHECK RESET SIGNAL OF PN807 PN807 PIN12 5V CHECK POWER SUPPLY PORT PN808 PN807 PN808 PIN 5 6 2V PIN 7 5V PN807 PIN 1 5V CHECK POWER SUPPLY PORT PN808 PN807 PN808 PIN 5 6 2V PIN 7 5V PN807 PIN 1 5V CHECK MICOM INTERFACE CIRCUIT PN807 PN807 PIN 11 13 14 15 SIGNAL CHECK 11 STAT 13 MDATA 14 MCLK 15 MLD CHECK THE WAVE FORM 1 YES YES YES YES YES...

Page 13: ...IC802 DEFECTIVE PICKUP OR IC803 OR IC801 OR IC802 DEFECTIVE PICKUP OR IC803 OR IC801 DEFECTIVE PICKUP OR IC802 DEFECTIVE PICKUP OR IC803 DEFECTIVE PICKUP OR IC803 OR IC801 OR IC802 CHECK PN802 PIN 10 LD CHECK PN801 PIN 14 15 TA TA CHECK PN802 PIN 5 6 SP SP CHECK PN801 PIN 13 16 FA FA DOES LENSE MOVE UP DOWN DOES LASER LIGHT DOES SPINDLE ROTATE IS READING OK YES YES YES YES YES NO NO NO NO NO ...

Page 14: ...EFECTIVE PN802 CONNECTOR DEFECTIVE PICKUP SLED MOTOR READING OK CHECK A NO DISC DISPLAY A A A A DOES SL WAVEFORM APPEAR AT IC803 PIN14 AND PN802 PIN3 WAVEFORM 2 SLED MOTOR WAVE DOES SLIN WAVEFORM APPEAR AT IC803 PIN 5 WAVEFORM 2 SLED DRIVE WAVE YES YES NO NO NO NO NO ...

Page 15: ...E PN801 CONNECTOR DEFECTIVE PICKUP FOCUS ACTUATOR READING OK CHECK B NO DISC DISPLAY B B B B DOES FA WAVEFORM APPEAR AT IC803 PIN15 AND PN801 PIN16 WAVEFORM 3 FOCUS COIL DRIVE WAVE DOES FAIN WAVEFORM APPEAR AT IC803 PIN 26 WAVEFORM 3 FOCUS DRIVE WAVE YES YES NO NO NO NO NO ...

Page 16: ...FECTIVE PN801 CONNECTOR DEFECTIVE PICKUP LASER PART READING OK CHECK C NO DISC DISPLAY C C C C IS V APPLIED TO PIN10 OF PN801 LASER SUPPLY VOLTAGE CHECK IS 3 3 V APPLIED TO PIN3 OF IC802 RF IC SUPPLY VOLTAGE CHECK IS 2 0 V PIN2 OF IC802 LASER CONTROL VOLTAGE CHECK YES YES NO NO NO NO NO NO ...

Page 17: ...VE PN802 CONNECTOR DEFECTIVE PICKUP SPINDLE MOTOR READING OK CHECK D NO DISC DISPLAY D D D D DOES SP WAVEFORM APPEAR AT IC803 PIN12 AND PN802 PIN6 WAVEFORM 4 SPINDLE MOTOR DRIVE WAVE DOES SPIN WAVEFORM APPEAR AT IC803 PIN 6 WAVEFORM 4 SPINDLE DRIVE WAVE YES YES NO NO NO NO ...

Page 18: ...CTIVE IC801 DEFECTIVE IC803 DEFECTIVE PN802 CONNECTOR DEFECTIVE PICKUP OR IC802 DEFECTIVE PICKUP OR IC802 DEFECTIVE IC801 READING OK CHECK E NO DISC DISPLAY DOES TA WAVEFORM APPEAR AT IC803 PIN17 AND PN801 PIN15 WAVEFORM 5 TRACKING COIL DRIVE WAVE DOES TAIN WAVEFORM APPEAR AT IC803 PIN 23 WAVEFORM 5 TRACKING DRIVE WAVE YES YES YES NO NO NO NO NO NO NO ...

Page 19: ...1 6 1 6 1 6 42 1 6 1 6 1 6 43 1 6 1 6 1 6 44 2 3 2 3 2 3 45 1 5 1 5 1 5 46 0 3 3 3 3 47 3 0 0 48 0 0 0 49 0 0 0 50 3 3 3 3 3 3 IC PIN NO STOP CD DA PLAY MP3 PLAY 51 0 8 0 8 0 8 52 1 6 1 6 1 6 53 1 6 1 6 1 6 54 3 3 3 3 3 3 55 1 1 4 1 56 1 1 4 1 57 0 0 0 58 1 6 1 6 1 6 59 0 0 0 60 1 6 1 6 1 6 61 3 3 3 3 3 3 62 0 0 0 63 0 0 0 64 0 0 0 65 0 0 0 66 0 0 0 67 1 5 1 5 1 5 68 0 0 0 69 0 0 0 70 0 0 0 71 1 1...

Page 20: ... 0 0 CD RW 3 0 25 1 6 1 6 1 6 26 1 6 1 6 1 6 27 1 6 1 7 1 6 28 1 6 1 7 1 6 29 1 6 1 7 1 6 30 1 6 1 7 1 6 31 1 6 1 7 1 6 32 1 6 1 7 1 6 IC PIN NO STOP CD DA PLAY MP3 PLAY IC803 1 0 0 0 BA5810FP 2 0 0 0 3 1 5 1 5 1 5 4 3 6 3 7 3 7 5 1 6 1 6 1 6 6 1 6 1 6 1 6 7 6 2 6 2 6 2 8 6 2 6 2 6 2 9 0 0 0 10 0 0 0 11 3 2 3 4 3 4 12 3 2 3 3 13 3 2 3 2 3 2 14 3 2 3 2 3 2 15 3 2 8 2 8 16 3 3 3 4 3 4 17 3 2 3 2 3 2...

Page 21: ...8 3 3 3 3 3 3 19 0 0 3 3 20 0 0 3 3 21 0 0 3 3 22 0 0 3 3 23 0 0 3 3 24 0 0 3 3 25 3 3 3 3 3 3 26 0 0 0 27 0 0 3 3 28 0 0 3 3 29 0 0 3 3 30 0 0 3 3 31 0 0 3 3 32 0 0 3 3 33 0 0 0 34 3 3 3 3 3 3 35 0 0 3 3 36 3 3 3 3 3 3 37 0 0 0 38 3 3 3 3 3 3 39 0 0 3 3 40 0 0 3 3 41 0 0 0 42 0 0 3 3 43 0 0 3 3 44 3 3 3 3 3 3 45 0 0 3 3 46 0 0 3 3 47 0 0 0 48 0 0 3 3 49 0 0 3 3 50 0 0 0 IC PIN NO STOP CD DA PLAY ...

Page 22: ... S LED DRIVE AND MOTOR WAVEFORM IC803 pin 5 X4 when foc us search 3 F OCUS DRIVE AND MOTOR WAVEFORM TP86X IC803 pin X5 When focus se arch f ailed or there is n o disc on tray There is disc on tray and f ocus search success PN807 M LD PN807 MCLK PN807 MDATA PN807 STAT IC803 SLIN IC803 SL TP86X IC803 FA TP86X IC803 FA ...

Page 23: ...860 IC803 pin 23 durin g normal play 4 SPINDL E DRIVE AND MOTOR WAVEFORM IC803 pin 6 2 when TOC reading IC803 SPIN IC803 SP TP 860 IC803 TA 6 RF TRA CKING AND FOCUS ERROR WAVEFORM IC802 pin 8 2 23 d uring normal play IC802 ARF IC802 TE IC802 FE ...

Page 24: ...903 TURN ON Check the pattern Replace Q903 Refer to power circuit END Check the 33V Lower of C916 Replace the ZD902 Replace D912 D911 YES YES YES YES YES NO NO NO NO NO P SENS PART Does 5V appear at ZD901 Check the pattern of IC301 Pin Check the waveform of D913 Check R943 and replace ZD901 Replace D913 YES YES NO NO 6 28 ...

Page 25: ...t of CN901 pin1 5 Check the AC Output of CN701 PIN 1 9 10 Replace IC904 Replace the D901 D902 D903 D904 Check the IC901 IC902 Check the 5V of IC501 pin5 Check the Low of Q904 B Replace Q904 Replace the Transformer Replace the Transformer Check the 5V of IC301 or check PN301 CN302 pin3 Check the HIGH of IC501 pin 14 Check the HIGH of Q905 B Check the IC501 and Replace YES YES YES YES YES YES YES YE...

Page 26: ...ng Check the 10V Higher and power circuit Check the input of IC601 pin 28 29 30 31 34 35 36 37 Check the Output of IC601 OK YES YES YES NO NO NO Muting circuit MUTE Dose Low appear at Q602 B Check the HIGH of Q601 Q651 B Refer to IC202 Troubleshooting ONLY Q201 Q251 MUTE Check the connector of Q602 B GND YES YES NO NO ...

Page 27: ...ing AUX Check the signal input of IC601 pin 29 36 Check the signal input of JK102 Check the signal input of IC601 pin 31 34 Check the signal of CN513 pin1 3 or Refer to CD Troubleshooting Check the signal input of IC601 pin 30 35 Refer to TUNERMODULE CD Tuner Check the OW601 Refer to IC404 Troubleshooting MIC ...

Page 28: ...it Refer to Power Circuit Troubleshooting Check the Data of IC301 Pin 13 14 CD TAPE FUNCTION Replace IC501 Check the pattern of IC301 IC501 Check the 5V of IC301 pin6 Check the oscillation of X301 Check the Low High of IC301 pin88 when power supplied Replace IC301 Check the power supplied to IC501 pin 16 Check the CLK Data of IC501 pin 2 3 Check the CONTROL function END YES YES YES YES YES YES YES...

Page 29: ...e Output of IC601 pin 24 25 Check the waveform input of IC601 pin 8 21 Check the waveform Output of IC601 pin 12 17 END Check the signal input of pin14 18 Refer to Muting Troubleshooting Refer to Power Circuit Troubleshooting Check the power 15V of pin 2 5 Check the power of pin 1 5 pin 6 17 Check the signal Output of pin 8 9 10 11 END YES YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO NO Re...

Page 30: ...e Deck Mechanism Replace the Deck Mechanism Replace the IC202 Check the signal output of IC202 pin 5 20 Check the Muting Circuit YES YES YES NO NO NO YES YES NO Dubbing NORMAL or REC HIGH Q252 202 OFF ON R273 223 LOW HIGH Q253 203 ON OFF Refer to IC203 Troubleshooting Refer to REC Troubleshooting ...

Page 31: ...er supplying to C236 Check the 0 6V of Q208 B Check the Low of Q208 C Replace Q207 END Check the Vcc power of IC202 Pin18 Check the oscillation of L203 pin 2 3 Replace the DECK Check the Low of Q253 Q203 B Replace Q253 Q203 Refer to IC203 Troubleshooting Refer to Power Circuit Troubleshooting Refer to IC203 trouleshooting Replace the Q208 Replace the L203 YES YES YES YES YES YES YES YES YES NO NO ...

Page 32: ... 2 25 CD MAIN P C BOARD COMPONENT SIDE ...

Page 33: ... 2 26 CD MAIN P C BOARD SOLDER SIDE ...

Page 34: ...2 25 2 26 BLOCK DIAGRAM NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock ...

Page 35: ...28 NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock NOTE 1 Shaded parts are critical for safety Replace only with specified part number 2 Voltages are DC measured with a digital voltmefer during Play mode ...

Page 36: ...2 29 2 30 FRONT SCHEMATIC DIAGRAM ...

Page 37: ...2 31 2 32 TUNER DECK SCHEMATIC DIAGRAM ...

Page 38: ...2 33 2 34 CDP SCHEMATIC DIAGRAM ...

Page 39: ...2 35 2 36 WIRING DIAGRAM NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock ...

Page 40: ...2 37 2 38 PRINTED CIRCUIT DIAGRAMS MAIN MIC P C BOARD SOLDER SIDE ...

Page 41: ...2 39 2 40 MAIN MIC P C BOARD COMPONENT SIDE ...

Page 42: ...2 41 2 42 FRONT P C BOARD COMPONENT SIDE ...

Page 43: ...2 43 2 44 FRONT P C BOARD SOLDER SIDE ...

Page 44: ...2 45 2 46 CD MAIN P C BOARD COMPONENT SIDE CD MAIN P C BOARD SOLDER SIDE ...

Page 45: ... POWER P C BOARD NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock 2 47 2 48 ...

Page 46: ... 2 49 INTERNAL BLOCK DIAGRAM OF ICs BA5810FP IC803 ...

Page 47: ...ries are Low Drop Voltage Regulator suitable for various electronic equipments It provides constant voltage power source with TO 220 4 termainal lead full molded PKG The Regulator has multi function such as over current protection overheat protection and ON OFF control 2 50 ...

Page 48: ... 2 51 KIA7805AP API IC901 THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V 6V 8V 9V 10V 12 15V 18V 24V EQUIVALENT CIRCUIT Block Diagram ...

Page 49: ... 2 52 KIA7805AP API IC901 THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V 6V 8V 9V 10V 12 15V 18V 24V EQUIVALENT CIRCUIT Block Diagram ...

Page 50: ... 2 53 BA3126N IC201 2 channel head switch for radio cassette recorders ...

Page 51: ... parallel data output 5 6 6 Q1 parallel data output 6 7 7 Q2 parallel data output 7 8 8 Q3 parallel data output 8 9 9 Q4 parallel data output 9 10 10 Q5 parallel data output 10 11 11 Q6 parallel data output 12 N C Not connected 13 N C Not connected 11 12 14 Q7 parallel data output 12 13 15 Q8 parallel data output 13 14 16 Q9 parallel data output 14 15 17 Q10 parallel data output 15 16 18 Q11 paral...

Page 52: ... 2 55 KIA4558P S IC602 BIPOLAR LINEAR INTEGRATED CIRCUIT ...

Page 53: ... 2 56 KA3082 IC804 Bi Directional DC Motor Driver Description The KA3082 is a monolithic integrated circuit designed for driving bi directional DC motor with braking and speed control ...

Page 54: ... 2 57 KIA7812API IC902 BIPOLAR LINEAR INTEGRATED CIRCUIT FEATURES Suitable for C MOS TTL the Other Digital IC s Power Supply Internal Thermal Overload Protection Internal Short Circuit Current Limiting ...

Page 55: ...sh 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 PICKUP GEAR MAIN BASE MAIN TRAY LOADING GEAR CAM H GEAR PU DOWN H ...

Page 56: ...26 TUNER 301 305 354 454 303 306 302 A00 297 A43 296 298 295 294 293 292 291 277 260 250 286 262 261 279 263 264 287 284 285 276 A48 275 A41 A46 310 A47 NOTE Refer to SECTION 5 REPLACEMENT PARTS LIST in order to look for the part number of each part SECTION 3 EXPLODED VIEWS ...

Page 57: ...9 PIGEON PULLEY FLYW 022 6768R VP03A 50 093 4748 PIGEON SOLENOID AS 023 6768R GP03A 50 093 4810 PIGEON GEAR ASSY C 025 6768R JP03B 50 093 31009 PIGEON PULLEY FLY 026 6768R SP01D 01 080 4609 PIGEON SPRING CWL4 027 6768R DP01A 50 259 3342 PIGEON LEVER CWL44 028 6768R RP01A 22 027 41054 PIGEON ROLLER CWL 029 6768R MP01A 50 219 4033 PIGEON MOLD CWL44 031 6768R SP04A 01 082 4731 PIGEON SPRING 032R 6768...

Page 58: ...9 PIGEON PULLEY FLYW 022 6768R VP03A 50 093 4748 PIGEON SOLENOID AS 023 6768R GP03A 50 093 4810 PIGEON GEAR ASSY C 025 6768R JP03B 50 093 31009 PIGEON PULLEY FLY 026 6768R SP01D 01 080 4609 PIGEON SPRING CWL4 027 6768R DP01A 50 259 3342 PIGEON LEVER CWL44 028 6768R RP01A 22 027 41054 PIGEON ROLLER CWL 029 6768R MP01A 50 219 4033 PIGEON MOLD CWL44 031 6768R SP04A 01 082 4731 PIGEON SPRING 032R 6768...

Page 59: ...1503 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 169 4860SB0001A CLAMP DISC CDM H1303 170 3550SB0001A COVER MAGNET CDM H1303 171 524 012AAAA COVER CLAMP MAGNET 030X018X5T 172 3040RB0005A BASE MAIN CDM H1503 173 4510RB0001A LEVER S W CLOSE 175 4680SBP001A MOTOR MECH OTHER...

Page 60: ... 4 1 MODEL LMS M1030 855 854 856 853 851 857 850 852 864 262 SECTION 4 SPEAKER SECTION ...

Page 61: ... 4 2 MEMO ...