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Related Manuals for LG MCD206
Summary of Contents for LG MCD206
- Page 1 Internal Use Only Website http://biz.lgservice.com MINI Hi-Fi SYSTEM SERVICE MANUAL MODEL: MCD206 (MCD206, MCS206F) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. OCTOBER...
- Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...
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Page 3: Table Of Contents
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... -
Page 4: Servicing Precautions
SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2. - Page 5 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.
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Page 6: Esd Precautions
ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. -
Page 7: Service Information For Eeprom
SERVICE INFORMATION FOR EEPROM POWER ON FLD Display "NO DISC" Set Front ‘STOP’ Key + Remote control ‘FWD SKIP’ Key push same timing during 5 seconds. DETECT NEW EEPROM NAME FLD ‘OPT-XXXXXX' 000000 (FM) 000100 (FM_RDS) 001010 (FM_AM) Press Set Front "Play" Key and move to appropriate position. -
Page 8: Program Update Guide
PROGRAM UPDATE GUIDE HOW TO UPDATE MCS PROGRAM (1) Change the file name to download as “(MODEL NAME)_(Version)_(Date).mcs”. Ex) MCD206_VER07_0328_052010.mcs (2) Copy 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. -
Page 9: Specifications
SPECIFICATIONS • GENERAL Power supply 200 - 240 V , 50 - 60 Hz Power consumption 50 W Net Weight 4.8 kg External dimensions (W x H x D) 272 x 334 x 355 mm Operating conditions Temperature 5 °C to 35 °C (41 °F to 95 °F) Operation status: Horizontal Operating humidity 5 % to 85 %... - Page 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...
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Page 12: Exploded Views
EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION (MCD206) 255L CABLE3 CABLE4 CABLE5 256L 255R 256R MAIN KEY-L A41L FRONT KEY-R A41R CABLE6 SMPS... - Page 13 MEMO MEMO...
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Page 14: Packing Accessory Section
2. PACKING ACCESSORY SECTION Battery Instruction Ass'y Remote Controller 803T Packing 803B Packing... -
Page 15: Speaker Section (Mcs206F)
3. SPEAKER SECTION (MCS206F) - Page 16 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.
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Page 17: Electrical Troubleshooting Guide
ELECTRICAL TROUBLESHOOTING GUIDE 1. SMPS PART 31 V abnormal F901 nomal? Replace F901 (Use same type fuse). BD901 nomal? Replace BD901. Replace TH901. TH901 nomal? Is VCC (9V-25V) Q904 nomal? supplied to IC901 pin4? Check or replace Q904. D941 nomal? Replace D941. - Page 18 ELECTRICAL TROUBLESHOOTING GUIDE 5 V abnormal F901 nomal? Replace F901 (Use same type fuse). BD901 nomal? Replace BD901. Replace TH901. TH901 nomal? Is VCC (9V-25V) D907 nomal? supplied to IC902 Pin5? Check or replace D907. ZD902 nomal? Replace ZD902. D959 nomal? Replace D959.
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Page 19: Amp Abnormal
ELECTRICAL TROUBLESHOOTING GUIDE 2. AMP ABNORMAL AMP abnormal Check L701,702 Check the speakers pin2, 4 output signal. connection. Check Check U701 pin28,31,36,39 PWM L703,L704,L705,L706, output signal. C711,C712. Check U701 Check U701 Check U701 Check U701 pin44,21,22,23,26,27, pin6,8,16,18 whether 32,35,40,41 whether pin7,17 high. -
Page 20: Function Mode Audio Abnormal
ELECTRICAL TROUBLESHOOTING GUIDE 3. FUNCTION MODE AUDIO ABNORMAL AUX abnormal Check U604 Check JK401 pin1,3. pin5,14 signal. Check U602 pin12“DAC_BCK”, Check U602 Check U604 pin10 “DAC_LRCK”, Normal. pin1,2 signal. pin3,13 signal. pin9 “DAC_DATA”, pin11“DAC_MCLK” data signal. Check U602. Check U602 Check R634, R635. - Page 21 ELECTRICAL TROUBLESHOOTING GUIDE Tuner abnormal Check Check U604 Check R110, R111. TU1 pin1, 2. pin1,12 signal. Check TU1 data signal pin4 “TUNER_CLK”, Check TU1. pin5 “TUNER_SDIO”, pin6 “TUNER_SEN”, pin7 “TUNER_RST”. Check U602 pin12 “DAC_BCK”, Check U602 Check U604 pin10 “DAC_LRCK”, Normal.
- Page 22 ELECTRICAL TROUBLESHOOTING GUIDE CD abnormal Check U802 pin16,87 “DAC_BCK”, Check R826,R881, pin80,88 “DAC_LRCK”, Normal R888,R886,R883. pin83 “DAC_DATA” data signal. Check U801 Check U804 Check pin41 “DAC_MCLK”, Check U804 pin36 “CD_BCK”, pin37 “DRM_CKE” U802 pin111,112 pin38 CLK signal. pin35 “CD_LRCK”, signal. signal.
- Page 23 ELECTRICAL TROUBLESHOOTING GUIDE USB abnormal Check U802 pin16,87 “DAC_BCK”, Check R826,R881, pin80,88“ DAC_LRCK”, R888,R886,R883. pin83 “DAC_DATA” data signal. Check U804 Check U802 Check pin116 “USB_D+”, pin37 “DRM_CKE” U802 pin111, 112 Normal. pin117 “USB_D-” signal. signal. signal. Check PN804 Check TX802, U802. Check U804.
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Page 24: Display Abnormal
ELECTRICAL TROUBLESHOOTING GUIDE 4. DISPLAY ABNORMAL Display abnormal Check IC301 Check VFD301 Check IC301 pin1 “VFD_CLK”, pin1,2 “FF+” (+4.3V±10%) pin50 “VKK” Normal. pin2 “VFD_DATA”, pin41,42 “FF-” voltage=-28V±10%. pin3 “VFD_STB” (-4.3V ±10%) signal. Check SMPS part. Check Check FB303. PN306 pin5. Check SMPS part. -
Page 25: Waveforms
WAVEFORMS 1. CD SEARCHING WAVEFORM IC807 pin61 EE IC807 pin62 TE IC807 pin60 FE 2. SPINDLE DRIVE & MOTOR WAVEFORM When show TOC IC808 Pin15, 16, 17, 18. IC808 pin17 SL- IC808 pin18 SL+ IC808 pin15 SP- IC808 pin16 SP+ 3-10... -
Page 26: Cd Playing Waveform
3. CD PLAYING WAVEFORM IC807 pin62 TE IC807 pin61 EE IC807 pin60 FE IC808 pin16 SP+ IC807 pin14 TD IC807 pin13 FD 3-11... -
Page 27: Cd Stop Action Waveform
IC807 pin63 RF 4. CD STOP ACTION WAVEFORM IC808 pin16 SP+ IC808 pin18 SLE+ IC808 pin1 T+ IC808 pin4 F+ 3-12... -
Page 28: Cd Reading Waveform
5. CD READING WAVEFORM IC807 pin41 MCK IC807 pin19 DIN IC807 pin20 RW IC807 pin21 BUSY IC807 pin39 LRCK IC807 pin40 BCK IC807 pin41 MCK IC807 pin38 DATA 3-13... -
Page 29: Usb Operating Waveform
6. USB OPERATING WAVEFORM PN804 pin3 D- PN804 pin4 +5V PN804 pin2 D+ 7. RADIO OPERATING WAVEFORM TU401 pin5 DATA TU401 pin7 RESET TU401 pin6 SCK 3-14... -
Page 30: Wiring Diagram
WIRING DIAGRAM SMPS HARNESS FFC 16P HARNESS HARNESS PN901 FFC 11P CN805 MAIN HARNESS PN804 CN304 CN104 FFC 18P PN305 HARNESS HARNESS KEY1 KEY2 FRONT 3-15 3-16... -
Page 31: Block Diagrams
BLOCK DIAGRAMS 1. SMPS BLOCK DIAGRAM PVDD PVDD=7.5A/5A PVDD Rectifier PVDD=7.5A/5A Transformer PVDD Diode PVDD=7.5A/5A EER 3435 PGND 200V/20A PGND DRIVE (100W) PGND (200W) PWM.DRV PGND +3.3V_PWM 200V/10A +3.3V_PWM EER 4242 STR-X6757N +3.3VD (100W) +3.3VD(1.5A) (200W) BRIDGE DIODE USB_5.6V (200W) PGND USB_5.6V GBU6J(200W) -
Page 32: Cd Block Diagram
2. CD BLOCK DIAGRAM CD BOARD L-out 16.9344MHZ PS9831 4Ω 100W 2 L/R_PWM A,B,C,D,E,F,RF 3-CDTray AMP DSP TAS5342A R-out CD/MDI CD/mp3 PHOTO5V,SENS PICK-UP P/UP UP,P/UP DOWN OPEN/CLOSE SERVO AUX-L&R AUX IN BU9543KV TUNER-L&R TRAY_IN,TRAY_OUT BU4052 AK5358A TRACK,FOCUS MOTOR L&R (4CH) (A/D) DRIVE SLEGP,SPINDLE... -
Page 33: Circuit Diagrams
BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter FROM THE LG CORPORATION. ALL COMPONENTS IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. SHOULD... -
Page 34: Amp Circuit Diagram
2. AMP CIRCUIT DIAGRAM MCD206 Rev1.2 2011. 06. 15 3-23 3-24... -
Page 35: Cd Dsp Circuit Diagram
3. CD DSP CIRCUIT DIAGRAM CD DSP MCD206 Rev1.3 2011. 06. 15 3-25 3-26... -
Page 36: Display & Control Circuit Diagram
4. DISPLAY & CONTROL CIRCUIT DIAGRAM Display & Control MCD66 & MCD206 Rev1.0 2011. 06. 15 3-27 3-28... -
Page 37: Circuit Voltage Chart
CIRCUIT VOLTAGE CHART 1. IC VOLTAGE CHECK LIST PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) IC301(PT6324) 3.26 2.35 U601(PS9831) 1.28 0.26 0.26... - Page 38 PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) PIN NO. TEST VOLT(V) 3.05 0.74 U805(S3053) 1.68 0.67 1.74 1.68 1.66 0.28 1.29 1.01 1.79 0.08 3.16 1.57...
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Page 39: Printed Circuit Board Diagrams
PRINTED CIRCUIT BOARD DIAGRAMS 1. MAIN P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-33 3-34... -
Page 40: Smps P.c.board
2. SMPS P.C.BOARD 3. FRONT P.C.BOARD 3-35 3-36... -
Page 41: Key P.c.board
4. KEY P.C.BOARD 5. USB P.C.BOARD 4-1. LEFT KEY 4-2. RIGHT KEY 3-37 3-38...