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LG MCD206, Руководство по обслуживанию

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SECTION 3

ELECTRICAL

CONTENTS

ELECTRICAL TROUBLESHOOTING GUIDE

 ....................................................................................

3-2

1. SMPS PART ........................................................................................................................................... 3-2
2. AMP ABNORMAL ................................................................................................................................... 3-4
3. FUNCTION MODE AUDIO ABNORMAL ................................................................................................ 3-5
4. DISPLAY ABNORMAL ............................................................................................................................ 3-9

WAVEFORMS

 .............................................................................................................................................

3-10

1. CD SEARCHING WAVEFORM ............................................................................................................ 3-10
2. SPINDLE DRIVE & MOTOR WAVEFORM .......................................................................................... 3-10
3. CD PLAYING WAVEFORM .................................................................................................................. 3-11
4. CD STOP ACTION WAVEFORM ......................................................................................................... 3-12
5. CD READING WAVEFORM ................................................................................................................. 3-13
6. USB OPERATING WAVEFORM .......................................................................................................... 3-14
7. RADIO OPERATING WAVEFORM ...................................................................................................... 3-14

WIRING DIAGRAM

....................................................................................................................................

3-15

BLOCK DIAGRAMS

 .................................................................................................................................

3-17

1. SMPS BLOCK DIAGRAM ..................................................................................................................... 3-17
2. CD BLOCK DIAGRAM .......................................................................................................................... 3-19

CIRCUIT DIAGRAMS

 ...............................................................................................................................

3-21

1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-21
2 . AMP CIRCUIT DIAGRAM .................................................................................................................... 3-23
3. CD DSP CIRCUIT DIAGRAM ............................................................................................................... 3-25
4 . DISPLAY & CONTROL CIRCUIT DIAGRAM ...................................................................................... 3-27

CIRCUIT VOLTAGE CHART

 .................................................................................................................

3-29

PRINTED CIRCUIT BOARD DIAGRAMS

 ..........................................................................................

3-33

1. MAIN P.C.BOARD ................................................................................................................................ 3-33
2. SMPS P.C.BOARD ............................................................................................................................... 3-35
3. FRONT P.C.BOARD ............................................................................................................................. 3-36
4. KEY P.C.BOARD .................................................................................................................................. 3-37
5. USB P.C.BOARD .................................................................................................................................. 3-38

 3-1

Содержание MCD206

Страница 1: ...DEL MCD206 MCD206 MCS206F CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL MCD206 MCD206 MCS206F SERVICE MANUAL 1 1 0 2 OCTOBER 95 3 6 9 4 5 7 N F A O N P Website http biz lgservice com Internal Use Only ...

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

Страница 3: ...SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS 1 3 ESD PRECAUTIONS 1 5 SERVICE INFORMATION FOR EEPROM 1 6 PROGRAM UPDATE GUIDE 1 7 SPECIFICATIONS 1 8 1 2 ...

Страница 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...

Страница 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...

Страница 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...

Страница 7: ...y Set Front STOP Key Remote control FWD SKIP Key push same timing during 5 seconds FLD Display E2P CLR Press POWER key Press Set Front Play Key and move to appropriate position Make changes with Set Front FWD SKIP Key FLD Display NO DISC DETECT NEW EEPROM NAME HEX OPT 000000 FM OPT 000100 FM_RDS OPT 001010 FM_AM 1 6 ...

Страница 8: ...py the file to the root folder of USB storage 3 Put the USB into the set Change set function to USB function Then the upgrade process will be started with the upgrade information FLD Display UPGRADE 4 If the upgrade process is complete the set will be rebooted with SUCCESS message and set auto power off 5 Pull out the USB Storage Press the power key 1 7 ...

Страница 9: ...z or 87 50 to 108 00 MHz AM Tuning Range optional 522 to 1 620 kHz or 520 to 1 710 kHz AMPLIFIER Output Power 100 W x 2 CD Frequency Response 40 Hz to 20 kHz Signal to noise ratio 70 dB Dynamic range 70 dB USB USB Version USB 2 0 or USB 1 1 Bus Power Supply DC 5 V 500 mA SPEAKERS Type 2 Way 2 Speaker Impedance 4 Ω Rated Input Power 50 W Max Input Power 100 W Net Dimensions W x H x D 201 x 339 x 22...

Страница 10: ...SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 3 1 CABINET AND MAIN FRAME SECTION MCD206 2 3 2 PACKING ACCESSORY SECTION 2 7 3 SPEAKER SECTION MCS206F 2 8 2 1 ...

Страница 11: ...2 2 MEMO ...

Страница 12: ...EY R I H B MAIN USB G C E F G F E I J K J K L 265 A43 CABLE4 KEY L FRONT 264 300 268 267 251 253 A41L A41R CABLE6 259 250 CABLE5 CABLE3 B A C D 453 453 453 451 451 451 453 453 453 454 454 454 453 452 452 452 455 452 A26 266 454 453 A45 A44 H 252 258 257 A46 256L 255L 255R 256R 272 ...

Страница 13: ...2 5 2 6 MEMO MEMO ...

Страница 14: ...2 7 2 PACKING ACCESSORY SECTION Battery 808 Remote Controller 900 803T Packing Bag 804 801 Box 802 803B Packing Instruction Ass y ...

Страница 15: ...2 8 3 SPEAKER SECTION MCS206F A60 ...

Страница 16: ...5 CD READING WAVEFORM 3 13 6 USB OPERATING WAVEFORM 3 14 7 RADIO OPERATING WAVEFORM 3 14 WIRING DIAGRAM 3 15 BLOCK DIAGRAMS 3 17 1 SMPS BLOCK DIAGRAM 3 17 2 CD BLOCK DIAGRAM 3 19 CIRCUIT DIAGRAMS 3 21 1 SMPS CIRCUIT DIAGRAM 3 21 2 AMP CIRCUIT DIAGRAM 3 23 3 CD DSP CIRCUIT DIAGRAM 3 25 4 DISPLAY CONTROL CIRCUIT DIAGRAM 3 27 CIRCUIT VOLTAGE CHART 3 29 PRINTED CIRCUIT BOARD DIAGRAMS 3 33 1 MAIN P C B...

Страница 17: ...901 nomal TH901 nomal BD901 nomal Is VCC 9V 25V supplied to IC901 pin4 Replace F901 Use same type fuse Replace TH901 Replace BD901 D941 nomal Replace ZD908 Q904 nomal Check or replace Q904 Replace D941 YES YES NO NO YES YES YES NO NO NO NO NO 1 SMPS PART ...

Страница 18: ... supplied to IC902 Pin5 Replace F901 Use same type fuse Replace D959 Replace TH901 Replace BD901 Replace IC957 ZD902 nomal Power line of main PCB is short D907 nomal Check or replace D907 Replace ZD902 YES YES NO NO YES YES YES YES YES NO NO NO NO NO NO NO ELECTRICAL TROUBLESHOOTING GUIDE ...

Страница 19: ...4 75 PWM signal Check U601 pin78 PWM_DATA pin79 PWM_CLK pin96 PWM_RESET data signal Check U701 pin28 31 36 39 PWM output signal Check the speakers connection Check L701 702 pin2 4 output signal Check U701 pin2 5 data signal Check L703 L704 L705 L706 C711 C712 Check FB600 U601 Check R725 U701 Check U601 U602 Check U802 Check power Check R721 R722 R724 R726 Normal Check R727 NO NO NO NO NO NO NO NO ...

Страница 20: ...eck U602 pin1 7 signal Check U603 pin3 5 signal Check U602 pin12 DAC_BCK pin10 DAC_LRCK pin9 DAC_DATA pin11 DAC_MCLK data signal Check U604 pin5 14 signal Normal Check JK401 pin1 3 Check R643 R644 Check U602 Check R634 R635 Check U603 NO NO NO NO NO NO YES YES YES YES YES YES AUX abnormal YES 3 FUNCTION MODE AUDIO ABNORMAL ...

Страница 21: ...UNER_CLK pin5 TUNER_SDIO pin6 TUNER_SEN pin7 TUNER_RST NO NO YES YES YES Tuner abnormal YES Check U604 pin3 13 signal Check U602 pin1 2 signal Check U603 pin1 7 signal Check U603 pin3 5 signal Check U602 pin12 DAC_BCK pin10 DAC_LRCK pin9 DAC_DATA pin11 DAC_MCLK data signal Normal Check U602 Check R634 R635 Check U603 NO NO NO YES NO NO YES YES YES YES YES Check U604 ...

Страница 22: ...8 CLK signal Check U802 pin16 87 DAC_BCK pin80 88 DAC_LRCK pin83 DAC_DATA data signal Check R826 R881 R888 R886 R883 Check U804 Check U804 Check TX802 U802 NO NO NO NO YES YES YES YES CD abnormal YES Check U801 pin41 DAC_MCLK pin36 CD_BCK pin35 CD_LRCK pin34 CD_DATA signal Check U801 pin48 49 signal Normal NO YES ...

Страница 23: ...n3 USB_D signal Check PN804 pin4 5 V Check U802 pin116 USB_D pin117 USB_D signal Check U802 pin16 87 DAC_BCK pin80 88 DAC_LRCK pin83 DAC_DATA data signal Normal Check R826 R881 R888 R886 R883 Check U809 Check U804 Check TX802 U802 Check FB12 FB13 Check USB connector NO NO NO NO NO NO YES YES YES YES YES YES USB abnormal YES ...

Страница 24: ...ck IC301 pin50 VKK voltage 28V 10 Check PN306 pin5 Check VFD301 pin1 2 FF 4 3V 10 pin41 42 FF 4 3V 10 Check PN306 pin13 VFD_CLK pin14 VFD_DATA pin12 VFD_STB signal Normal Check R307 R308 R309 Check PN306 cable connection Check SMPS part Check SMPS part Check FB303 NO NO NO NO NO YES YES YES YES YES Display abnormal YES ...

Страница 25: ...ING WAVEFORM 1 IC807 pin61 EE 7 IC808 pin16 SP 4 IC808 pin17 SL 5 IC808 pin18 SL 6 IC808 pin15 SP 2 IC807 pin62 TE 3 IC807 pin60 FE 2 SPINDLE DRIVE MOTOR WAVEFORM 3 10 WAVEFORMS When show TOC IC808 Pin15 16 17 18 ...

Страница 26: ...3 CD PLAYING WAVEFORM 8 9 10 11 IC807 pin62 TE IC807 pin61 EE IC807 pin60 FE IC808 pin16 SP 12 IC807 pin14 TD 13 IC807 pin13 FD 3 11 ...

Страница 27: ...14 IC807 pin63 RF 4 CD STOP ACTION WAVEFORM 16 15 17 18 IC808 pin18 SLE IC808 pin16 SP IC808 pin1 T IC808 pin4 F 3 12 ...

Страница 28: ...23 24 25 26 IC807 pin39 LRCK IC807 pin40 BCK IC807 pin41 MCK IC807 pin38 DATA 5 CD READING WAVEFORM 19 20 21 22 IC807 pin41 MCK IC807 pin19 DIN IC807 pin20 RW IC807 pin21 BUSY 3 13 ...

Страница 29: ...6 USB OPERATING WAVEFORM 27 28 29 PN804 pin3 D PN804 pin4 5V PN804 pin2 D 7 RADIO OPERATING WAVEFORM 30 31 32 TU401 pin5 DATA TU401 pin7 RESET TU401 pin6 SCK 3 14 ...

Страница 30: ...S HARNESS 6P PN804 CN804 CN304 CN104 MD PN901 PN902 FRONT PN305 PN303 PN301 KEY2 PN304 KEY1 PN302 FFC 16P USB PN316 HARNESS 15P HARNESS 8P FFC 18P HARNESS 2P HARNESS 2P CN806 CN805 CN105 HARNESS 4P FFC 11P WIRING DIAGRAM ...

Страница 31: ...B_5 6V 5V 1 5A DGND 5VM MGND 12VA 12VA AGND Transformer EER 2828 INPUT 90 240V CONDENSOR 270uF 450V 180uF 450V PC9XX EL817 PC9XX EL817 IC 278R33 Rectifier Diode Triode PC9XX EL817 PGND PWM DRV PVDD Rectifier Diode Rectifier Diode IC 278R05 IC 278R12 Rectifier Diode 4 3V 250mA 4 3 250mA VKK DGND_CPU 5 6VA PWR_SENSE PWR_CTRL VFD_POW Triode Rectifier Diode Rectifier Diode PVDD PVDD PGND PGND 3 3V_PWM...

Страница 32: ...CDTray MOTOR DRIVE IC S3053 USB_DM USB_DP BU4052 4CH USB CON AUX IN TUNER SI4730 SI4702 SI4705 CLK DATA RST L out AMP TAS5342A VFD DISPLAY PT6324 VFD DRIVER KEY IR 0 0DLQs s 7s M M M 63 s M L_IN M L_OUT TRACK FOCUS TRAY_IN TRAY_OUT PHOTO5V SENS SB5V 5V GND 12V 12V PVDD GND VKK FF FF PS9831 AMP DSP DATA L R_PWM R out IR_IN AUX L R TUNER L R 12 288MHZ SLEGP SPINDLE STANDBY VFD_POW 4Ω 100Wϧ2 16 9344M...

Страница 33: ...y mode IMPORTANT SAFETY NOTE 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 CAUTION Danger if fuse is incorrectly replaced Replace only with the type identical to fuse rating and or model name described in main label Warning Parts that are shaded are critical with respect to risk of fire or electrical shock SMPS MCD206 Rev1 0 2011 06 15 No Power BD901 is Defective AMP No Power ...

Страница 34: ...3 23 3 24 2 AMP CIRCUIT DIAGRAM 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 AMP MCD206 Rev1 2 2011 06 15 ...

Страница 35: ...3 25 3 26 3 CD DSP CIRCUIT DIAGRAM 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 CD DSP MCD206 Rev1 3 2011 06 15 ...

Страница 36: ...3 27 3 28 4 DISPLAY CONTROL CIRCUIT DIAGRAM 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 Display Control MCD66 MCD206 Rev1 0 2011 06 15 ...

Страница 37: ...8 43 GND 44 GND 45 0 46 0 47 3 4 48 1 7 49 1 7 50 GND 51 1 7 52 1 7 53 GND 54 1 7 55 1 7 56 3 4 57 GND 58 1 7 59 1 7 60 GND 61 1 7 62 1 7 63 GND 64 GND 65 3 4 66 1 8 67 1 7 68 1 7 69 GND 70 1 7 71 1 7 72 3 4 73 GND 74 1 7 75 1 7 76 3 4 77 3 4 78 3 3 79 3 3 80 1 8 81 GND 82 GND 83 GND 84 GND 85 GND 86 1 7 PIN NO TEST VOLT V 87 1 7 88 1 7 89 1 7 90 1 28 91 1 8 92 GND 93 1 69 94 3 4 95 GND 96 3 3 97 ...

Страница 38: ...6 101 1 66 102 1 68 PIN NO TEST VOLT V 103 3 05 104 0 105 0 106 3 3 107 3 3 108 3 3 109 GND 110 GND 111 1 6 112 1 6 113 3 3 114 GND 115 3 3 116 0 06 117 0 06 118 GND 119 GND 120 1 2 121 GND 122 1 2 123 GND 124 1 2 125 3 3 126 3 3 127 3 3 128 1 2 U803 EON 8M FLASH 1 3 3 2 1 3 3 3 3 4 GND 5 3 3 6 0 7 3 3 8 3 3 U804 EM638165TS 7G 1 3 3 2 1 65 3 3 3 4 0 67 5 0 79 6 GND 7 0 7 8 0 5 9 3 3 PIN NO TEST VO...

Страница 39: ...3 33 3 34 PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C BOARD TOP VIEW BOTTOM VIEW ...

Страница 40: ...3 35 3 36 2 SMPS P C BOARD 3 FRONT P C BOARD ...

Страница 41: ...3 37 3 38 4 KEY P C BOARD 5 USB P C BOARD 4 1 LEFT KEY 4 2 RIGHT KEY ...

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