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LG LM-M530A, Service Manual

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LG LM-M530A Service Manual Download Page 9

- 2-2 -

3. RECORD BIAS ADJUSTMENT

Head

Unit

PN202

GND

Record/Playback
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

Summary of Contents for LM-M530A

Page 1: ...MINI COMPONENT SYSTEM SERVICE MANUAL MODEL LM M530A D X LMS M530 SERVICE MANUAL MODEL LM M530A D X LMS M530 P N 3829RAT083J JULY 2003 ...

Page 2: ... CHECK POINT 2 24 BLOCK DIAGRAM 2 26 SCHEMATIC DIAGRAMS 2 28 WIRING DIAGRAM 2 36 PRINTED CIRCUIT DIARGAMS 2 38 INTERNAL BLOCK DIAGRAM OF IC s 2 49 REPAIRS REGARDING CD MECHANISM 2 55 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 ...

Page 3: ...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 the l...

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: ...quency 450MHz Signal to noise ratio 35dB Frequency Response 100Hz 1800Hz OUtput Power 50W 50W AMP T H D 0 15 Frequency Response 40Hz 25000Hz Signal to noise ratio 80dB Tape Speed 4 75 2 1 Wow flutter 0 25 F F REW Time 120sec LIMIT Tape Frequency Response 125Hz 8000Hz Signal to noise ratio 43dB channel separation 50dB Erase Ratio 55dB Type 5Way 5Speaker Impedance 5Ω Frequency Response 60 20000Hz SP...

Page 7: ... 1 6 ...

Page 8: ... to band being aligned 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 Spe...

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: ...801 DEFECTIVE IC803 DEFECTIVE PN802 CONNECTOR DEFECTIVE PICKUP OR IC802 DEFECTIVE PICKUP OR IC802 DEFECTIVE IC801 READING OK CHECK E NO DISC DISPLAY E E E E 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: ...ck the PATTERN Replace the ZD902 Replace the Q903 Refer to power circuit END Check the 33V LOWER of C916 Replace the D704 D705 YES YES NO NO P SENS PART Does 5V appear at ZD901 Check the pattern of IC301 Pin Check the waveform of D913 cathod Check the R768 and replace ZD901 Replace the D703 YES YES NO NO 26 28 AUDIO PART 2 12 ...

Page 20: ...1 PIN 9 10 Replace the IC904 Replace the D901 D902 D903 D904 Replace the D706 D707 D708 D709 Check the IC901 IC902 Check the 5V of IC301 pin78 Check the Low of Q904 B Check the Q904 CD Ass y Check the power Ass y or Replace the Transformer Check the power Ass y or Replace the Transformer Check the 5V of IC301 PIN13 PN302 CN302 PIN13 Check the HIGH of Q905 B and Replace Check the High of IC501 pin ...

Page 21: ...roubleshooting Check the 10V Higher of IC601 pin 5 Check the power circuit Check the input of IC701 pin3 Check the Output of IC701 pin14 END YES YES YES NO NO NO Muting circuit MUTE Dose Low appear at Q702 B Check the High of Q701 Q751 B MUTE Check the connector of Q702 B and GND Replace the TR YES YES NO ...

Page 22: ...g AUX Chekc the signal input of IC601 pin 5 24 Check the signal input of JK102 Check the signal input of IC601 pin 3 26 Check the signal of CN513 pin 1 3 or Refer to CD Troubleshooting Check the signal input of IC601 pin 4 25 Refer to TUNER MODULE CD Tuner Check the IC601 pin2 Refer to IC404 Troubleshooting MIC ...

Page 23: ...it Refer to Power Circuit Troubleshooting Check the Data of IC301 Pin 3 4 CD TAPE FUNCTION Replace the IC501 Check the pattern of IC301 IC501 Check the 5V of IC301 pin26 Check the oscillation of X301 When power supplying to IC301 pin11 High Low High Replace the IC301 Check the power supplying to IC501 pin16 Check the CLK Data of IC501 pin 2 3 Check the CONTROLL function END YES YES YES YES YES YES...

Page 24: ...t Troubleshooting Check the power 5V of pin 5 Replace the IC601 Replace the IC301 Troubleshooting Replace the IC601 Check the Pulse waveform of IC601 pin14 15 VOL DIAL Check the Output of IC601 pin 7 22 Check the waveform input of IC601 pin 8 21 Check the waveform Output of IC601 pin12 17 Check the signal input of pin7 11 Check the power of pin 3 pin 1 16 Check the signal Output of pin 2 4 END END...

Page 25: ...VCC supplying to IC202 pin 18 Refer to Power Circuit Troubleshooting Check the Deck Mechanism Replace the Deck Mecha Replace the IC202 Check the signal output of IC202 pin 5 20 Check the Muting Circuit YES YES YES NO NO NO ...

Page 26: ...pplying to C236 Check the 0 6V of Q208 B Check the Low of Q208 C Replace the 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 the 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 ...

Page 27: ... 2 20 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 28: ...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 29: ... 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 30: ...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 31: ... 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 32: ...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 33: ... 2 46 NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock Power P C BOARD ...

Page 34: ... 2 47 CD MAIN P C BOARD COMPONENT SIDE ...

Page 35: ... CD MAIN P C BOARD SOLDER SIDE 2 48 ...

Page 36: ... 2 49 INTERNAL BLOCK DIAGRAM OF ICs MN6627933CG IC801 Pin Assignment Note Pins marked with an asterisk can be switched to different signals by using microcontroller commands ...

Page 37: ... 2 50 Internal Block Diagram ...

Page 38: ... 0 28 DVDD1 I Power supply 1 for internal digital circuits 29 SPOUT O Spindle drive signal output absolute value 30 SPPOL O Spindle drive signal output polarity 31 TRVP O Traverse drive signal output positive polarity 32 TRVM O Traverse drive signal output negative polarity 33 TRVP2 O Traverse drive signal output 2 positive polarity 34 TRVM2 O Traverse drive signal output 2 negative polarity 35 TR...

Page 39: ...al output 76 BLKCK O Subcode block clock signal output 77 SMCK O 4 2336 8 4672 MHz clock signal output 78 PMCK O 88 2 kHz clock signal output 79 TX O Digital audio interface signal output 80 FLAG O Flag signal output 81 NRST I LSI reset signal input 82 NTEST I Test mode setting input 83 DVSS3 I Ground 3 for digital circuits 84 X1 I Crystal oscillator circuit input 85 X2 O Crystal oscillator circui...

Page 40: ... designed for driving bi directional DC motor with braking and speed control and it is suitable for the loading motor driver of VCR CDP and TOY systems The speed control can be achieved by adjusting the external voltage of the speed control pin It has two pins of logic inputs for controlling the forward reverse and braking ...

Page 41: ...RXX Series 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 ...

Page 42: ... 2 55 KIA7805AP API IC 901 THREE TERMINAL POSITIVE VOLTAGE REGULATORS 5V 6V 8V 9V 10V 12 15V 18V 24V EQUIVALENT CIRCUIT Block Diagram ...

Page 43: ... 2 56 BA3126N IC 201 2 channel head switch for radio cassette recorders ...

Page 44: ... 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 45: ...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 46: ... 6400SCSX01D SPEAKER TWEETER FE 576E SAMMI DT 13A36L 2 DOME 854 6400WSMG02A SPEAKER WOOFER CW 125B60L 2 SAMMI WOOFER LMS 855 4766RM0014C FELT LMS 230 530 BLACK CABINET FEL 856 3091RMW053A CABINET ASSEMBLY SPK LMS 530 PB 12T 857 6871RU9274A PWB PCB ASSEMBLY SUBSET AUDIO LMS 530 NETWORK 2 2UF NEGATIVE 858 3610RM0024A FOOT SPK LMS 230 530 OTHER EVA PH 864 353M050M SCREW DRAWING 2 D3 5 L10 0 MSWR3 FZY...

Page 47: ... 4 2 ...

Page 48: ...2 26 2 27 BLOCK DIAGRAM NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock ...

Page 49: ...9 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 50: ...2 30 2 31 FRONT SCHEMATIC DIAGRAM ...

Page 51: ...2 32 2 33 TUNER DECK SCHEMATIC DIAGRAM ...

Page 52: ...2 34 2 35 CDP SCHEMATIC DIAGRAM ...

Page 53: ...2 36 2 37 WIRING DIAGRAM NOTE Warning Parts that are shaded are critical With respect to risk of fire or electrical shock ...

Page 54: ...2 38 2 39 PRINTED CIRCUIT DIAGRAMS MAIN P C BOARD SOLDER SIDE ...

Page 55: ...2 40 2 41 MAIN P C BOARD COMPONENT SIDE ...

Page 56: ...2 42 2 43 FRONT P C BOARD COMPONENT SIDE ...

Page 57: ...2 44 2 45 FRONT P C BOARD SOLDER SIDE ...

Page 58: ...351 A41 310 A47 306 302 354 454 303 452 306 TUNER 301 454 A46 354 253 252 A26 272 271 273 274 285 284 A00 A43 263 262 264 275 265 282 279 280 281 286 261 260 310 278 279 NOTE Refer to SECTION 5 REPLACEMENT PARTS LIST in order to look for the part number of each part ...

Page 59: ...SP01H 01 081 4657 PIGEON SPRING CWL4 020 6768R BP01C 02 083 4188 PIGEON BELT FELT C 021 6768R LP01A 50 223 4254 PIGEON PULLEY FLYW 022 6768R VP01A 50 093 4125 PIGEON SOLENOID CW 023 6768R GP01B 50 221 3009 PIGEON GEAR CWL44 024 6768R AP01B 50 139 4292 PIGEON ARM CWL44 025 6768R JP01B 50 093 3361 PIGEON PULLEY FLYW 026 6768R SP01D 01 080 4609 PIGEON SPRING CWL4 027 6768R MP01B 50 093 3036 PIGEON MO...

Page 60: ...8 BELT FELT 021 6768R LP01A 50 223 4254 PULLEY 022 6768R VP01A 50 093 4125 SOLENOID 023 6768R GP01B 50 221 3009 GEAR 024 6768R AP01B 50 139 4292 ARM 025 6768R JP01B 50 093 3361 PULLEY 026 6768R SP01D 01 080 4609 SPRING 027 6768R DP01A 50 259 3342 LEVER 028 6768R RP01A 22 027 41054 ROLLER 029 6768R MP01A 50 219 4033 MOLD 031 6768R SP01L 01 080 4649 SPRING 032 6768R EP01A 50 093 4070 HEAD AY 033 676...

Page 61: ...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...

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