LG CM8440 Service Manual Download Page 62

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2. MAIN SYSTEM BLOCK DIAGRAM

LC7 SERVO

AM5890

Mo to r Drive

A,B,C,D,E,F,P
D

USB_HUB_DP/DN

CS5346

MLC3730

MCS

LOGIC

SPDO/SLDO/FOD/TRD

LOAD±,SLED±,
SPIN±,TR±,F±

OP_SW,CL_SW,UP_SW,DN_SW,D_SENSE

MOT_MUTE,CLOSE,OPEN

ADC_DATA

DAC_MCLK
/BCK/LRCK

PT_L/R

AUX_L/R

AUX

USB1

Po rtable

CD_

/W,

SY,

_16M

BSYQ,

CD_

MCK

RCK

/DA

TUNER_L/R

USB2

TUNER

FRONT

MICOM
R5F100GEAFB

VFD_STB/CLK/DO/RS T
STANDBY_LED,VOL_LED,
VFD_LED/REMOCON
USB_PWR_CTRL/VOL_A/B /
KEY1,2,3

E2PROM_CLK/DATA

TAS5548

PWM

FL±

RL±

DRIVER
IRS2092
(x 4EA)

Front : 380W x 2
Surr : 380W x 2
Woofer : 380W x 1

16.9344MHz

VFD

DIG301

Receiver

LED_CTRL, FILE A/B,
SCRATCH A/B FAN CTRL,
MIC_VOL A/B

Volume/

Key

32.768KHz

MCU_CS/MCU_
RST

MUC_TX/RX

MIC_O_DATA0

(+3.3V)

(+3.3V_UCOM)

(+3.3V_CD, VCC1.2)

(+5V)

(+3.3V_RF,+3.3V_CD,+1.8V)

(+3.3V_USB)

(+5V,

+3.3V_ADC)

(+3.3V)

P/UP

DECK
MECHANISM

(VCC50)

12.288MHz

FR±

RR±

DAC IC

AZ4580

DAC IC
AZ4580

FET
IRF6775
(x 12EA)

SW1

I2C/EXT_MUTE/RST

PWM_MCK/BCK/
LRCK

SPENA

AGL_F/R

AGL_SW

PROTEC / SD

DCP

OTW

FAN_CTL

AMP_OSC

MCS Interface

128Mb it
SDRAM

8MByte

Serial Flas h

(+3.3V_CD)

CLK/DAT/CE/RST /GP O2

S4308

MIC

MIC_SIG0

MIC_SIG

(+5_MIC)

MIC_DET

MIC CODEC

ADC CODEC

BT_RX, BT_CTS

EEPROM

24MHz

FL1

FL2

Summary of Contents for CM8440

Page 1: ... MODEL CM8440 CM8440 CMS8440F W CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL MODEL CM8440 CM8440 CMS8440F W SERVICE MANUAL P NO AFN76932780 JANUARY 2015 Website http biz lgservice com Internal Use Only ...

Page 2: ...CONTENTS SECTION 1 GENERAL SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST 1 1 ...

Page 3: ...SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS 1 3 ESD PRECAUTIONS 1 5 HIDDEN KEY MODE 1 6 SERVICE INFORMATION FOR EEPROM 1 7 PROGRAM DOWNLOAD UPDATE GUIDE 1 8 SPECIFICATIONS 1 12 1 2 ...

Page 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...

Page 5: ...replacing 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 A...

Page 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...

Page 7: ...ROM Option by SKIP 3 Clear EEPROM Front Key STOP RCU Key SKIP 4 Edit EEPROM Front Key STOP RCU Key SKIP You can change the digit of option by SKIP You can edit 0 f by REPEAT or PLAY PAUSE key 5 Bluetooth DUT Front Key STOP RCU Key PROGRAM Bluetooth model only 6 Power Disc Lock On Off CD Function Only Active Front Key STOP RCU Key EQ 7 Amp Clip On Off Front Key STOP RCU Key Mute Amp Clip Mode Chang...

Page 8: ...same timing during 5 seconds FLD op0 Move to appropriate position and make changes with remote control REPEAT Press STOP key FLD WRITE OK Remote control Front STOP push same timing FLD e2p clr Completed NAME OP0 OP1 OP2 OP3 OP4 OP5 OP6 OP7 OP8 OP9 DETECT NEW EEPROM OPTION EDIT SCREEN HEX 05 00 00 00 00 69 81 45 00 00 1 7 SERVICE INFORMATION FOR EEPROM ...

Page 9: ...d the file to your set Downloading file proceeds in the same way at USB1 function and USB2 function Caution When downloading the file you should neither unplug the USB device change to the other function nor power off the device USB device must be unplugged when the downloading process is completed ON VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH MICOM UP FINISH Auto POWER OFF...

Page 10: ... download the file to your set Downloading file proceeds in the same way at USB1 function and USB2 function Caution When downloading the file you should neither unplug the USB device change to the other function nor power off the device USB device must be unplugged when the downloading process is completed ON VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH MCS UP SMJ UP FINISH A...

Page 11: ...wnload the file to your set Downloading file proceeds in the same way at USB1 function and USB2 function Caution When downloading the file you should neither unplug the USB device change to the other function nor power off the device USB device must be unplugged when the downloading process is completed ON VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH DEMO UP FINISH Auto POWER...

Page 12: ...re then download the file to your set Downloading file proceeds in the same way at USB1 function and USB2 function Caution When downloading the file you should neither unplug the USB device change to the other function nor power off the device USB device must be unplugged when the downloading process is completed ON VFD DISPLAY SCREEN NO USB Insert USB device at USB function SEARCH EQ UP FINISH Au...

Page 13: ...08 00 MHz AMPLIFIER Total 1 900 W Streo mode 380 W x 4 Sub woofer 380 W CD Frequency Response 40 to 20 000 Hz Signal to noise ratio 75 dB Dynamic range 80 dB FRONT SPEAKER Type 2 Way 2 Speaker Impedance 6 Ω Rated Input Power 380 W Max Input power 760 W SURROUND SPEAKER Type 1 Way 1 speaker Impedance 6 Ω Rated Input Power 380 W Max Input power 760 W Net Dimensions W x H x D 335 x 445 x 300 mm Net W...

Page 14: ...SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 3 1 CABINET AND MAIN FRAME SECTION CM8440 2 3 2 MECHANISM DECK SECTION DP17TM2 2 5 3 PACKING ACCESSORY SECTION 2 7 4 SPEAKER SECTION 2 8 2 1 ...

Page 15: ...MEMO 2 2 ...

Page 16: ...47 443 443 443 268 270 269 300 272 271 443 443 443 443 443 F B T A52 CABLE4 A44 259 K MIC PTB 443 CABLE3 G H I J 443 443 CABLE1 FRONT CABLE2 I J K 291 NFC Tag A43 A56 NOTES THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE ...

Page 17: ...2 MECHANISM DECK SECTION DP17TM2 1026 1439 A001 1002 1005 1001 1049 1437 1437 1024 1024 1030 1024 1043 1045 A005 A006 1016 1013 1015 1020 1024 1003 1439 1018 1019 1011 1012 1437 1004 ...

Page 18: ...801 Owner s Manual 804 Bag 802 Box 808 Battery 900 Remote Control 825 FM Wire Antenna 803 Packing 803 Packing 826 Filter Ferrite Core 3 PACKING ACCESSORY SECTION ...

Page 19: ...A60L 4 SPEAKER SECTION 4 1 FRONT SPEAKER CMS8440F LEFT SPEAKER ...

Page 20: ...A60R FRONT SPEAKER CMS8440F RIGHT SPEAKER ...

Page 21: ...A90 4 2 SUBWOOFER SPEAKER CMS8440W ...

Page 22: ... 3 30 WAVEFORMS OF MAJOR CHECK POINT 3 35 WIRING DIAGRAM 3 39 BLOCK DIAGRAMS 3 41 1 SMPS BLOCK DIAGRAM 3 41 2 MAIN SYSTEM BLOCK DIAGRAM 3 43 3 MAIN POWER BLOCK DIAGRAM 3 45 CIRCUIT DIAGRAMS 3 47 1 SMPS POWER 1 CIRCUIT DIAGRAM 3 47 2 SMPS POWER 2 CIRCUIT DIAGRAM 3 49 3 MAIN CD DSP CIRCUIT DIAGRAM 3 51 4 MAIN RF SERVO CIRCUIT DIAGRAM 3 53 5 MAIN ADC PWM CIRCUIT DIAGRAM 3 55 6 MAIN AMP CIRCUIT DIAGRA...

Page 23: ...mark F901 If F901 is not short circuit replace it with a same specifications one TH900 TH901 If TH900 TH901 is open replace it with a new one BD901 If BD901 is short circuit replace it with a new one T12AH 250V 12A 250V GND GND FH901 1 2 FH902 1 2 VR900 FNR 14K681T C906 1uF 550V CM901 0 33uF 275V CM902 0 33uF 275V CM903 0 22uF 275V PN901 GP390 02P TS LF901 2 0 9 F L H m 8 2 25x15 HS906 Opti 1 2 3 ...

Page 24: ...SMD FH912 1 2 FH911 1 2 P GND P GND P GND P GND P GND P GND P GND P GND T902 CM9720 PULSE 1 5 6 7 10 4 IC902 ICE1HS01G 1 1 FMIN 2 CS 3 FB 4 VINS 5 GND 6 LG 7 HG 8 VCC Q905 IPA60R190E6 1G 3S 2D Q906 IPA60R190E6 1G 3S 2D F911 6 3A 250V TP32 TP38 TP39 TP41 TP42 TP43 TP46 TP47 TP48 TP60 TP61 TP62 TP63 TP64 TP65 PC903 2 3 R980 R944 1M R945 1M R942 1M R9A3 1M R9A6 1M R941 24K 1 R950 10K R949 22 R9B4 0OH...

Page 25: ...nd DVCC 3 3 V IC505 in standby mode If there is no 5 6 VA check the SMPS and if doesn t appear 3 3 V check IC505 2 Check 5 6 VA 12 V FL FL an 39 V when power on the set If the set doesn t work regardless of what the KEY2 changes high to low while pressing the power button X500 and X501 work normally but if you can not power on the set replace the IC501 with a new one on the main board 2 1 3 Servic...

Page 26: ...ace DIG300 on FRONT board 3 1 2 How to troubleshoot Countermeasure 1 Check if 39V FL and FL are output from SMPS to VFD via the main board 2 Check if the IC101 outputs VFD_RST VFD_CLK VFD_STB and VFD_STB to the front board 3 Check if the VFD grid current amplifier circuit Q301 Q303 on the front board Check the drive signal to the transistor s base If the control signals from VFD DGND_2 VH VDD isn ...

Page 27: ...oltage of IC505 pin3 on MAIN board If IC505 pin3 about 4 9 V D500 Input 5 6 VA doesn t come out check 5 6 VA from SMPS board 2 If IC505 pin3 about 4 9 V is normal check the PWR_CTRL IC505 pin2 is high about 3 3 V If PWR_CTRL isn t high check pinB2 of IC501 R524 R5F7 3 If PWR_CTRL is high check R5F6 R5F4 R5F5 and if there s no defective component then replace IC505 4 If 3 3 V VCC33 is normal check ...

Page 28: ...lace X500 on MAIN board 4 2 2 How to troubleshoot Countermeasure 1 If 3 3 V 1 2 V is normal check Reset High of IC501 pinT12 on MAIN board If MAIN_RESET isn t high check MICOM IC101 pin40 2 If MAIN_RESET is high check the soldering status of 24 MHz crystal X500 3 If the crystal X500 doesn t oscillate check R508 R509 C502 C503 around crystal X500 If there s no defective component then replace X500 ...

Page 29: ...3 2 How to troubleshoot Countermeasure 1 If the crystal X500 does oscillate check serial flash IC503 on MAIN board Check pin8 VCC pin6 CLK pin1 CS pin2 DO pin5 DI of below waveform 2 If pin1 2 5 6 8 doesn t come out check damping resistor R564 R563 R535 R536 R534 of IC503 If damping resistor of IC503 is OK then replace IC503 it need to download program 3 After change IC503 if it is still not below...

Page 30: ...eplace IC502 on MAIN board 4 4 2 How to troubleshoot Countermeasure 1 Check below waveform soldering status of SDRAM IC502 on MAIN board If pin17 CAS pin18 RAS pin19 CS pin38 CLK pin29 address pin2 DQ doesn t come out check damping resistor R568 R506 R570 R544 R547 2 If resistor is OK then replace IC502 SDRAM 3 After change IC502 if it is still not below waveform check IC501 DSP IC 4 4 3 Service h...

Page 31: ...01 4 5 1 Solution Please check and replace IC501 MLC3730 on MAIN board 4 5 2 How to troubleshoot Countermeasure 1 After check them by previous pages about no booting if the set is still no booting Check soldering status of IC501 2 If below bootstrap waveform doesn t come out then replace IC501 DSP IC 4 5 3 Service hint Any picture Remark R594 PGPB12 Yellow R598 PAD19 Green R597 PAD20 Pink y y _ y ...

Page 32: ...termeasure 1 Check the SPDO signal from Pin16 of IC407 If no signal check 3 3 V RF and X400 2 Check the SP SP from IC408 to CN405 for driving SPINDLE motor It is about 3 6 Vp p If no signal check 1 8 V and 5 V for IC408 3 Check if the FFC cable is solidly connected between CN405 and MD 4 Check the MD If the spindle motor is sort circuit or has any trouble it can not rotate CD discs Please check th...

Page 33: ...re 1 Check the SLDO signal from Pin23 of IC407 If no signal check 3 3 V RF and X400 2 Check the SLED SLED from IC408 to CN405 for driving SPINDLE motor It is about 2 9 Vp p If no signal check 1 8 V and 5 V for IC408 3 Check if the FFC cable is solidly connected between CN405 and MD 4 Check the MD If the sled motor is sort circuit or has any trouble it can not move the pick up module Please check t...

Page 34: ...SE MOTOR 5 3 1 Solution Please check and replace IC407 IC408 on MAIN board 5 3 2 How to troubleshoot Countermeasure 1 Check MOT_OPEN MOT_CLOSE signals from Pin K4 L4 of IC501 to IC408 If no signal check 1 8 V 5 V to IC408 2 Check LOAD from IC408 to CN405 for driving the tray open close motor It is about 3 85 Vp p If no signal check 5 V to IC408 If it has any trouble replace it with a new one 3 Che...

Page 35: ...aser beam be positioned in the center of a track on CD disc 1 Check the TRD signal from Pin22 of IC407 If no signal check 3 3 V RF and X400 2 Check TR TR from IC408 to CN404 for driving the tracking actuator If no signal check 1 8 V and 5 V for IC408 3 Check if the FFC cable is solidly connected between CN404 and MD 4 Check the MD If the pick up module has any trouble it can not move the laser bea...

Page 36: ...aser beam keep a regular interval with the surface of a CD disc 1 Check the FOD signal from Pin21 of IC407 If no signal check 3 3 V RF and X400 2 Check F F from IC408 to CN404 for driving the focusing actuator If no signal check 1 8 V and 5 V for IC408 3 Check if the FFC cable is solidly connected between CN404 and MD 4 Check the MD If the pick up module has any trouble it can not move the laser b...

Page 37: ...01 on MAIN board IC300 on USB board 6 1 2 How to troubleshoot Countermeasure 1 Check 5VU to USB board If 5 6 VA to pin2 of IC300 LDO doesn t come out check pin4 5 of CN304 If 5 6 VA is normal 5VU of IC300 pin3 doesn t come out then replace IC300 2 Check if Digital audio AMP block 6 1 3 Service hint Any picture Remark kR kT Waveform of USB D signal USB D D CN502 Pin1 2 9 10 USB function signal flow...

Page 38: ...for IC202 If is NG replace it a new one 4 Check the following I2S signal flow from IC501 to IC600 If there is any trouble check the power for each IC The power is normal but if the signal waveform to the IC is distorted or no signal replace it with a new one 5 Check if the digital audio AMP block is okay If AMP is damaged replace it with a new one 6 2 3 Service hint Any picture Remark w sG G YX w ...

Page 39: ...to IC501 If no signal check 5 V 3 3 V ADC for IC202 If is NG replace it a new one 6 Check the following I2S signal flow from IC501 to IC600 If there is any trouble check the power for each IC The power is normal but if the signal waveform to the IC is distorted or no signal replace it with a new one 7 Check if the digital audio AMP block is okay Refer to Digital Audio AMP guide If AMP is damaged r...

Page 40: ...if ADC_DATA is entered from IC202 to IC501 If no signal check 5 V 3 3 V ADC for IC202 If is NG replace it a new one 4 Check the following I2S audio signal flow from IC501 to IC600 If there is any trouble check the power for each IC The power is normal but if the signal waveform to the IC is distorted or no signal replace it with a new one 5 Check if the digital audio AMP block is okay Refer to Dig...

Page 41: ...new one if it has a problem 4 Check if MIC_BCK MIC_MLCK MIC_LRCK is entered from IC501 to IC508 Check if MIC_DATA is entered from pin9 of IC508 to pin7 of IC600 If no signal check 5 V 3 3 V for IC508 If it is abnormal change replace it a new one 6 Check the following I2S signal flow from IC508 to IC600 If there is any trouble check the power for each IC If the signals are abnormal replace it a new...

Page 42: ... state If there are no signal out from module replace new module 2 Check if BT_RX TX is entered from Pin5 7 of CN504 to Pin169 170 to IC501 DSP 3 Check if MIC_BCK MIC_MLCK MIC_O_DATA is entered from IC501 to IC600 If no signal check VCC12 1 2 V for IC501 If it is abnormal change replace it a new one 4 Check the following I2S signal flow from IC501 to IC600 If there is any trouble check the power f...

Page 43: ...ubleshoot Countermeasure 1 Please check if this system is on bass blast mode C RL and RR make sound only on bass blast mode 2 Check the IC700 IC705 on your eyes 3 Check the audio signal output check Pin13 of IC700 IC705 First check the Audio Data input Pin3 of IC700 IC705 4 If the audio signal output has no output try to change IC which has no output 5 Lastly check Speaker Terminal TM701 TM702 7 1...

Page 44: ... when DC protection is detected Main reasons are like below When Some of AMP FETs dead 8 1 3 Service hint Any picture Remark AMP FET IRF6775 Notice for FET service In case of RF6775 Metal case FET Drain has electric potential So be careful when you deal with it You can see FET after removing heatsink Notice for Service Before repair Main Assy you need to discharge SMPS After then open the connecto...

Page 45: ...pply voltage of AMP CN110 PWM signal Normal Supply voltage and signal Check AMP IC Poor supply voltage Check SMPS Assy Poor signal Check PWM IC 2 Check CSD of FET driver IC IRS2092 EAN60778301 CSD has about 5 V on normal state When AMP has problem CSD is LOW state or keep change LOW to HIGH 9 1 3 Service hint Any picture Remark juXXWGGwpuGXSYGaGT wpuGZS GaGwnuk wpuG S GaGR J GwpuG GpjGTeGjzk ...

Page 46: ...lace F901 same fuse Check or replace D962 D963 D960 D961 normal Replace BD901 Check P_CTL from μ com Check and replace IC951 Or check line of MAIN PCB is short or not Check or replace D960 D961 NO NO NO NO NO F901 normal Is the VCC 13 VA supplied to IC951 Pin1 Is the VCC 11 V 25 V supplied to IC901 Pin4 BD901 normal Is there H signal at IC951 Pin4 ...

Page 47: ...RONT PCB is short or not NO NO NO R968 normal ZD951 ZD952 normal D957 D959 normal No 5 V Check or replace R965 D959 Check P_CTL from μ com Check or replace Q953 Q957 Or check line of MAIN PCB is short or not Check or replace Q951 Is the VCC 7 VA supplied to IC953 Pin2 Is there H signal at Q953 Base NO NO NO R965 normal YES YES YES ...

Page 48: ...HOOTING GUIDE No output AMP gate line Check or replace R952 Check or replace D951 D952 Check and replace IC952 Or check line of MAIN PCB is short or not Is the VCC 13 VA supplied to IC952 Pin1 to Pin3 NO NO R952 normal YES YES ...

Page 49: ... Q907 Q910 Check or replace IC902 and check Q911 Q914 gate Pin2 components Resistors Diodes Q911 Q914 OK Replace Q911 Q914 Check or replace D953 D956 Check line of MAIN PCB is short or not Is the C904 C905 voltage about 380 V F911 normal PFC P CTL OK AMP P CTL OK Is the VCC 12 V supplied to IC904 Pin16 Is the VCC 12 V supplied to IC902 Pin8 NO YES NO NO NO NO YES NO YES YES YES YES NO NO ...

Page 50: ...1 303 304 grid voltage OK Replace LED LD3V09 LD3V24 Check MAIN board HELLO Display on FLD OK Volume LED LD3V31 LD3V40 LD3V42 LD3V49 turn on When turn the volume count is change NO NO NO NO NO NO NO NO NO NO CN301 cable connection OK Q301 Q303 Q304 grid voltage OK CN3V01 Pin8 9 12 V OK CN3V01 pin31 32 signal OK CN301 Pin9 11 data signal OK CN301 Pin1 3 5 power OK YES YES YES YES YES YES YES YES YES...

Page 51: ...Check Loading motor Check IC501 OPU driving Focusing Tracking OK Check OPU Pick up module Is motor impedance about 12 Ω IC407 Pin51 52 53 I2S output signal OK Can disc insert IC501 Pin N1 N2 N4 I2S input signal OK Disc reading OK NO NO NO NO NO NO NO NO NO IC407 RF Servo signal OK Focusing Tracking Sled signal OK LOAD OK YES YES YES YES YES NO YES YES YES A 3 NO AUDIO PART ...

Page 52: ...0 USB power 5 VU OK YES A A When insert USB IC501 PinU7 U8 A7 A8 USB_D signal OK NO YES YES YES YES AUX Check audio cable Replace IC202 Check IC501 NO NO NO IC202 Pin7 8 AUX input signal OK IC202 Pin41 ADC MIC_data output signal OK IC202 Pin42 43 44 I2S input signal OK ...

Page 53: ...IN input signal OK IC202 Pin41 ADC MIC_data output signal OK IC202 Pin42 43 44 I2S input signal OK TUNER Check IC501 Replace IC202 Check 3 3 V of TU500 IC202 Pin42 43 44 I2S input signal OK IC202 Pin41 ADC data output signal OK NO NO NO TU500 TUNER_L R output signal OK YES A IC202 Pin23 24 TUNER_L R input signal OK NO YES YES YES ...

Page 54: ... 33 B ELECTRICAL TROUBLESHOOTING GUIDE A YES YES YES Check IC501 Replace IC600 Check IC501 NO NO NO IC501 Pin D1 D2 E1 I2S clock signal OK IC600 PWM data output signal OK IC501 Pin E2 I2S data signal OK ...

Page 55: ...22 Q723 Q724 Pin28 29 35 36 of IC600 FL FR signal OK Pin13 of IC700 IC701 IC704 IC705 FL FR audio signal OK IC601 602 FL FR audio signal OK 40 V 28 V 5 V power voltage OK Q700 Q701 Q702 Q703 Q714 Q716 Q719 Q720 OK Pin26 27 31 32 of IC600 SWL SWR signal OK Pin13 of IC702 IC703 IC706 IC708 SWL SWR audio signal OK IC603 604 SWL SWR audio signal OK 40 V 28 V 5 V power voltage OK Q704 Q705 Q708 Q709 Q7...

Page 56: ...1 2 3 4 5 3 35 WAVEFORMS OF MAJOR CHECK POINT 1 WAVEFORM OF SERVO Figure 1 1 CD 16M IC407 Pin31 Figure 1 2 SERVO FE TE FOD RF IC407 Pin61 62 63 IC408 Pin1 ...

Page 57: ...FORM OF MOTOR DRIVE Figure 2 1 SP SP for driving SPINDLE motor IC408 Pin17 18 Figure 2 2 SL SL for driving SPINDLE motor IC408 Pin11 12 SP SL SP SL Figure 2 3 LO LO for driving Tray motor IC408 Pin9 10 LO LO RED MOT_OPEN MOT_CLOSE ...

Page 58: ... WAVEFORM OF AUDIO SIGNAL Figure 3 1 IC501 Pin83 84 85 Figure 3 2 AUDIO_L R LRCK AUDIO_L DATA BCK AUDIO_R 4 WAVEFORM OF ADC 5 WAVEFORM OF USB Figure 4 ADC I2S IC202 Pin42 43 44 Figure 5 USB D D CN502 Pin1 2 Pin9 10 MCK D LRCK BCK D ...

Page 59: ...20 21 22 23 3 38 6 WAVEFORM OF CRYSTAL 7 WAVEFORM OF VFD GRID CURRENT DRIVER Figure 6 12 MHz Crystal IC501 Pin27 28 Figure 7 XI CH1 R327 TP304 CH2 Q301 Emitter XO ...

Page 60: ...3 39 3 40 VFD FRONT 10P 2mm 10P 2mm Portable MIC MIC Vol MIC Portable 10P 2mm 10P 1 25mm 15P 2 5mm 6P 3 96mm SMPS 15P 2 5mm 6P 3 96mm 40P 1 25mm 40P 1 25mm MD 10P 1mm MAIN FAN WIRING DIAGRAM ...

Page 61: ...S01G FET 20A 600V 2EA 4 5V 39V 12V 5 6VA PVDD 66V AC FL VKK MAINSMPS IC STR 2A153 Flyback MAIN TRANS u com BT USB MPEG Motor Drive FAN LED Mic VFD PFC P CTRL 5V PVDD 66V GATE Half Bridge LLC TRANS AMP Gate Drive 4 1CH 1900W OPAMP AMP P CTRL Totem pole PFC IC R2A20112A Interleaved DCM FET 13A 600V 4EA Gate Drive PFC Out 380V م م م م م On Off On Off م Vcc Vcc On Off On Off R_ L R_R ...

Page 62: ...DRIVER IRS2092 x 4EA Front 380W x 2 Surr 380W x 2 Woofer 380W x 1 16 9344MHz VFD DIG301 IR Receiver LED_CTRL FILE A B SCRATCH A B FAN CTRL MIC_VOL A B Volume Key 32 768KHz MCU_CS MCU_ RST MUC_TX RX MIC_O_DATA0 3 3V 3 3V_UCOM 3 3V_CD VCC1 2 5V 3 3V_RF 3 3V_CD 1 8V 3 3V_USB 5V 3 3V_ADC 3 3V M P UP DECK MECHANISM VCC50 12 288MHz FR RR SW DAC IC AZ4580 DAC IC AZ4580 DAC IC AZ4580 FL RL FR RR SW FET IR...

Page 63: ...p 80mA 15mA 60mA 130mA 0mA 20mA 20mA 160mA ADC IC202 CS5346 20mA VKK FL 550mA 1A 287mA Bluetooth Option 38mA CP Chip Option 7mA 3 3V IC204 LDO LM37102D IC505 LDO TJ4220 IC102 RESET AZ7027 IC103 PWR SENS AZ7027 2mA 2mA 10mA 3 3V 3 2V 80mA USB HUB IC506 AZ1117 USB HUB 1 2V IC101 U_COM RENESAS 22mA 50mA 12V 2A IC506 MIC PRE AMP S4308 FAN X 1 FRONT SPK LED 32EA Woofer SPK LED 68EA 100mA 2mA 62V 5V 62V...

Page 64: ...T DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED IMPORTANT SAFETY 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 SMPS 1 EAX65367301_18 1 6_SMPS_SD_1 2014 01 25 CAUTION Danger if fuse is incorrectly replaced Replac...

Page 65: ... 2 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 SMPS 2 EAX65367301_18 1 6_SMPS_SD_2 2014 01 25 Warning Parts that are shaded are critical with respect to risk of fire or electrical shock ...

Page 66: ...3 51 3 52 3 MAIN 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 EAX65564602_2 1 0_MAIN_SD_1 2014 01 25 ...

Page 67: ...3 53 3 54 4 MAIN RF SERVO 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 RF SERVO EAX65564602_2 1 0_MAIN_SD_3 2014 01 25 ...

Page 68: ...3 55 3 56 5 MAIN ADC PWM 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 ADC PWM EAX65564602_2 1 0_MAIN_SD_4 2014 01 25 ...

Page 69: ...3 57 3 58 6 MAIN 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 EAX65564602_2 1 0_MAIN_SD_5 2014 01 25 ...

Page 70: ...3 59 3 60 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 FRONT VOLUME EAX65547303_1 1 0 2015 01 19 7 FRONT VOLUME CIRCUIT DIAGRAM ...

Page 71: ...3 61 3 62 8 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 MIC PORTABLE EAX65589003_1 1 0 2015 01 19 MIC PORTABLE CIRCUIT DIAGRAM ...

Page 72: ...65 75 65 80 C881 100uF 16V 16V 11 82 11 86 No Pin Location Pin No Spec V Spec Range V CABLE Input Margin V CABLE Output Margin V CN106 MAIN CN901 SMPS CN106 MAIN 1 VKK 39 35 43 40 9 1 90 40 9 1 9 2 FL 7 2 na 7 65 0 45 7 65 0 45 3 FL 2 5 na 2 74 0 24 2 76 0 26 5 5V 5 4 8 5 2 5 01 0 01 5 01 0 01 7 8 9 5 6V 5 6 5 2 5 8 5 67 0 07 5 66 0 06 13 12V 12 11 13 12 0 00 11 99 0 01 14 B 66 64 68 65 8 0 20 65 ...

Page 73: ...3 65 3 66 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD TOP VIEW ...

Page 74: ...3 67 3 68 SMPS P C BOARD BOTTOM VIEW ...

Page 75: ...3 69 3 70 2 MAIN P C BOARD TOP VIEW ...

Page 76: ...3 71 3 72 MAIN P C BOARD BOTTOM VIEW ...

Page 77: ...3 73 3 74 3 FRONT VOLUME P C BOARD ...

Page 78: ...3 75 3 76 4 MIC PORTABLE P C BOARD MEMO ...

Page 79: ...3 77 3 78 MEMO MEMO ...

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Summary of Contents for CM8440

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LG CM8440, Service Manual

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Summary of Contents for CM8440

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