LG CJ44 Service Manual Download Page 44

Page: 44 / 65

1. POWER (SMPS)

No 5.6 VA

YES

F901 normal?

Replace F901 (Use the same fuse).

YES

BD901 normal?

Replace BD901.

YES

TH901(TH903) normal?

Replace TH901.

YES

Is Vcc

(10 V ~ 18 V) supplied to

IC901 pin7?

Is there

about 2.5 V at IC951

pin1?

D902 normal?

Replace D951.

YES

Check or replace D902.

Is there

about 2.5 V at

IC941 Pin1?

Replace IC941.

YES

D951 normal?

Replace D951.

YES

D933 normal?

Replace D933.

YES

Power line of main PCB is short.

3-17

ELECTRICAL TROUBLESHOOTING GUIDE

Summary of Contents for CJ44

Page 1: ...MANUAL SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only JANUARY 2017 MODEL CJ44 CJ44 CJS45F MODEL CJ44 CJ44 CJS45F Mini Hi Fi System P NO AFN77612119 ...

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

Page 3: ...PRECAUTIONS 1 3 ESD PRECAUTIONS 1 5 HIDDEN KEY MODE 1 6 1 HIDDEN KEY MODE TABLE 1 6 2 HIDDEN KEY MODE DESCRIPTION 1 7 SERVICE INFORMATION FOR EEPROM 1 9 PROGRAM DOWNLOAD GUIDE 1 10 FOTA UPDATE STEP USING BT APP 1 12 SPECIFICATIONS 1 14 1 2 ...

Page 4: ...age 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 cot ton ...

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 ...

Page 6: ...t 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 conductive mat...

Page 7: ...Front Stop Remote Control Key Stop for 5s Front Stop Remote Control Key Stop for 5s Power Disc Lock On Off Front Stop Front Open for 5s Front Stop Front Open for 5s Demo ALL Key Lock Front Stop Remote Control Key 9 for 5s Front Stop Remote Control Key 9 for 5s BT Auto Power On Off Front Remote Control Key Power for 5s Front Remote Control Key Power SET Power Off ChildSafe On Off Volume 0 Min Front...

Page 8: ...rsion EQ Version EQ Check sum Version 2 2 EEPROM Initial Function Initialize data stored in EEPROM and BACKUP RAM data Entrance Key Front Stop Remote Control Key for 5s Exit Key Auto exit Explanation E2P CLR is displayed on the VPD and turn off the power automatically 2 3 OPTION EDIT EEPROM Refer to the page 00 2 4 APD Test Display Function Auto Power Down timer is displayed on VFD Entrance Key Fr...

Page 9: ...de all key blocks only the volume key is effective when All Key Lock is enabled To release Demo Mode it is available after All Key Lock Off 2 8 BT Auto Power On Off Function Ability to disable BT Auto Power On function by network shutdown regulation Entrance Key Front Remote Control Key Power for 5s Exit Key SET Power Off with Front Remote Control Key Power 2 9 ChildSafe On Off Function Power off ...

Page 10: ...iate position And make changes with remote control REPEAT key Press Stop Key VFD WRITE OK Front Stop Remote control push same timing during 5 s VFD E2P CLR Completed 1 9 SERVICE INFORMATION FOR EEPROM NAME OPT0 OPT1 OPT2 OPT3 OPT4 OPT5 OPT6 OPT7 OPT8 OPT9 OPT10 OPT11 OPT12 OPT13 OPT14 DETECT NEW EEPROM OPTION EDIT SCREEN HEX 01 LGEAP 11 LGERA 31 2D 26 LGEAP 22 LGERA 19 00 00 43 4A 34 00 00 00 00 0...

Page 11: ...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 1 Fast Format USB device 2 Copy Firmware file to USB device NO USB Insert USB device at USB function SEARCH MICOM...

Page 12: ...loading 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 1 Fast Format USB device 2 Copy Firmware file to USB device NO USB Insert USB device at USB function SEAR...

Page 13: ...Device Version info on Setting tab Step3 Select update button When touch the Update button user could update the SET firmware using FOTA Step2 Device version info When touch the Device Version info button user could find the current and latest SET version on pop up menu Step4 Confirm update Select the OK button on the caution message ...

Page 14: ...omplete After completed the download from the smart phone the SET overwrite the firmware to flash memory When finishing the flash memory writing pop up message about finish is displayed and the SET auto power off Step6 Transfer FW After completed the download from server smart phone start to transfer the firmware to the SET The progress bar is displayed on BT App ...

Page 15: ... stereo jack x 1 Microphone MIC Sensitivity 20 mV 1 kHz 6 3 mm jack x 1 TUNER FM Tuning Range 87 5 to 108 0 MHz or 87 50 to 108 00 MHz SYSTEM Frequency Response 100 to 20 000 Hz Signal to noise ratio More than 75 dB Dynamic range More than 75 dB Bus Power Supply USB 5 V 500 mA AMPLIFIER RMS Output power Total 720 W RMS Front 240 W RMS X 2 3 Ω at 1 kHz 20 THD Subwoofer 240 W RMS 3 Ω at 60 Hz 20 THD...

Page 16: ...ND MAIN FRAME SECTION 2 3 2 PACKING ACCESSORY SECTION 2 7 3 SPEAKER SECTION 2 8 DISASSEMBLY INSTRUCTIONS 2 9 1 Case Top 2 9 2 Bracket 2 9 3 Panel Rear 2 10 4 MAIN Board SMPS Board 2 11 5 Main PCB SMPS PCB 2 12 6 Panel PCB Multi Knob 2 13 7 Bracket SMPS 2 14 8 MD 2 14 2 1 ...

Page 17: ...2 2 ...

Page 18: ...463 443 443 264 443 443 D E F G C B A A47 273 A46 443 MAIN SMPS 443 H CABLE1 A45 272 EXPLODED VIEWS 1 CABINET AND MAIN FRAME SECTION 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 2 4 2 3 ...

Page 19: ...2 6 2 5 ...

Page 20: ...2 7 802 Box 804 Bag Packing 803 900 Remote control 808 Battries 825 FM antenna 801 Owner s manual 2 PACKING ACCESSORY SECTION ...

Page 21: ...2 8 A60 3 SPEAKER SECTION FRONT SPEAKER ...

Page 22: ...RUCTIONS Figure 1 Figure 2 1 Case Top 1 1 Remove the 5 Screws 1 2 Remove the Case Top 2 Bracket 2 1 Remove the two Brackets between Front Back Panel You can easily remove the Bracket after the hook detach from Front Panel ...

Page 23: ...2 10 2 1 2 Figure 3 3 Panel Rear 3 1 Remove the 4 Screws from the Panel Rear 3 2 Remove the Power Cord FAN Cable from the SMPS Board 3 3 Remove the Panel Rear ...

Page 24: ...Figure 4 4 MAIN Board SMPS Board 4 1 Remove the 9 Screws from the MAIN Board SMPS Board 4 2 Remove the 6 Cables from the MAIN Board 4 3 Remove the Power Cord from the SMPS Board 4 4 Remove the MAIN Board SMPS Board ...

Page 25: ...2 12 Figure 5 5 Main PCB SMPS PCB 5 1 Remove the 2 Screws 5 2 Unhook the 5 Locking Tabs by using Flat head screwdriver 5 3 Remove the Panel Front Assembly ...

Page 26: ...head screwdriver in the hole H1 6 1 2 Remove the Multi Knob 6 2 Jack PCB 6 2 1 Remove the 2 Screws 6 2 2 Remove the Jack PCB 6 3 BT Module 6 3 1 Unhook the Locking tab L1 6 3 2 Remove the BT Module 6 4 Front PCB 6 4 1 Remove the 7 Screws 6 4 2 Unhook the 2 Locking tabs L2 from the Panel PCB 6 4 2 Remove the Front PCB ...

Page 27: ...2 14 Figure 8 8 MD 8 1 Remove the 2 Screws from the MD 8 2 Remove the MD Figure 7 7 Bracket SMPS 7 1 Remove the Bracket SMPS ...

Page 28: ...K 3 22 6 POWER AMP PART CHECK 3 23 7 TUNER AUX FUNCTION CHECK 3 24 8 TUNER FUNCTION CHECK 3 24 9 CD FUNCTION 3 25 10 DOUBLE USB FUNCTION 3 26 WAVEFORMS OF MAJOR CHECK POINT 3 27 WIRING DIAGRAM 3 29 BLOCK DIAGRAMS 3 31 1 SYSTEM BLOCK DIAGRAM 3 31 2 SMPS BLOCK DIAGRAM 3 33 3 POWER BLOCK DIAGRAM 3 35 CIRCUIT VOLTAGE CHART 3 37 1 INPUT VOLTAGE OF ICs 3 37 2 INPUT VOLTAGE OF CONNECTORS 3 37 3 VOLTAGE O...

Page 29: ...bleshoot Countermeasure 1 Check if the fuse F901 is open or short circuit 2 Check if the bridge diode BD901 is short circuit by over current with a digital multi meter 3 Check if the NTC thermistor TH901 or TH903 is normal or open 1 1 3 Service hint Any picture Remark F901 If F901 is not short circuit replace it with a same specifica tions one TH901 If TH901 is open replace it with a new one BD901...

Page 30: ...2 D951 1 2 1 Solution Please check and replace D951 on SMPS board 1 2 2 How to troubleshoot Countermeasure 1 Check the anode cathod voltage of D951 with a digital multi meter it is normally 0 2 0 3 V If it doesn t have any voltage it s destroyed Replace it with a new one 1 2 3 Service hint Any picture Remark SMPS schematic diagram ...

Page 31: ...2 1 2 How to troubleshoot Countermeasure 1 Check 12VA to CN102 in standby mode If there is no 12 VA check the SMPS 2 Check 12VA and PVDD 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 IC500 with a new one on the MAIN board 2 1 3 Service hint Any pic...

Page 32: ...VFD via the MAIN board 2 Check if Check if LED_5 V DVCC_3 V output from the MAIN board 3 Check if IC500 outputs VFD_D0 VFD_CLK and VFD_STB to the FRONT board 4 Check if VFD300 output SW signal to the FRONT board If the SW signal isn t output replace VFD300 with new one 5 check if Q300 and Q301 to the FRONT board If the VH signal isn t output replace Q300 Q301 with new one If the VH signal is outpu...

Page 33: ...rmeasure 1 Check the SPDO signal from pin24 of IC401 If no signal check 3 3 V RF and X400 2 Check the SPIN SPIN from IC400 to CN401 for driving SPINDLE motor It is about 3 6 Vp p If no signal check 1 8 V and 5 V for IC401 3 Check if the FFC cable is solidly connected between CN401 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 ...

Page 34: ...t Countermeasure 1 Check the SLDO signal from Pin23 of IC400 If no signal check 3 3 V RF and X400 2 Check the SLED SLED from IC401 to CN401 for driving SPINDLE motor It is about 2 9 Vp p If no signal check 1 8 V and 5 V for IC401 3 Check if the FFC cable is solidly connected between CN401 and MD 4 Check the MD If the sled motor is sort circuit or has any trouble it can not move the pickup module P...

Page 35: ...als from Pin K4 L4 of IC500 to IC400 If no signal check 1 8 V 5 V to IC401 2 Check LOAD from IC401 to CN401 for driving the tray open close motor It is about 3 85 Vp p If no signal check 5 V to IC401 If it has any trouble replace it with a new one 3 Check if the FFC cable is solidly connected between CN401 and MD 4 Check the MD If the tray motor is sort circuit or has any trouble it can not open o...

Page 36: ...r makes the laser beam be positioned in the center of a track on CD disc 1 Check the TRD signal from Pin22 of IC400 If no signal check 3 3 V RF and X400 2 Check TR TR from IC408 to CN401 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 CN401 and MD 4 Check the MD If the pickup module has any trouble it can not move t...

Page 37: ...r makes the laser beam keep a regular interval with the surface of a CD disc 1 Check the FOD signal from Pin21 of IC400 If no signal check 3 3 V RF and X400 2 Check F F from IC408 to CN401 for driving the focusing actuator If no signal check 1 8 V and 5 V for IC401 3 Check if the FFC cable is solidly connected between CN401 and MD 4 Check the MD If the pickup module has any trouble it can not move...

Page 38: ... power is normal but if the signal waveform to the IC is distorted or no signal replace it with a new one 3 Check if Digital audio AMP block on Item 5 2 is normal 5 1 3 Service hint Any picture Remark MCS_MCLK 16 93 MHz MCS_BCK 1 4 MHz MCS_DATA_OUT MCS_LRCK 44 1 KHz Waveform of I2S audio interface signals I2S Signal Flow M P UP PWM TAS5548 TAS5624LA FR FL Woofer 12 288 MHZ TAS5624LA IC401 DSP IC50...

Page 39: ...to IC700 Refer to I2S audio signal interface on Item 5 1 2 Check PVDD If PVDD is abnormal check the SMPS 3 Check 12 V for driving the gate of AMP IC a All the powers are normal but if 12 V is low there is possible for AMP IC to be damaged b Remove L741 L745 L731 and L740 one by one When removed a inductance if 12 V is recovered the IC connected to it was damaged c Replace the IC with a new one 4 C...

Page 40: ...form to the IC is distorted or no signal replace it with a new one 3 Check if Digital audio AMP block on item 5 2 is normal 5 3 3 Service hint Any picture Remark D to pin 1 4 of CN502 D to pin 2 5 of CN502 Waveform of USB D signal USB function signal flow PWM FR FL Woofer 12 288 MHZ DSP IC501 176 PIN BGA USB1_D USB2_D Interrupt controller CDROM x8 speed Decoder NAND Controller within BCH codec 14b...

Page 41: ... IC is distorted or no signal replace it with a new one 5 Check if the digital audio AMP block is okay Refer to Digital Audio AMP guide on Item 5 2 If AMP is damaged replace it with a new one 5 4 3 Service hint Any picture Remark AUX function signal flow PWM FR FL Woofer 12 288 MHZ DSP IC501 176 PIN BGA IC201 AUX AUX_L R Interrupt controller CDROM x8 speed Decoder NAND Controller within BCH codec ...

Page 42: ... 1 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 Digital Audio AMP guide on Item 5 2 If AMP is damaged replace it with a new one 5 5 3 Service hint Any picture Remark TUNER IN function signal flow PWM FR FL Woofer 12 288 MHZ DSPI...

Page 43: ... is distorted or no signal replace it with a new one 5 Check if the digital audio AMP block is okay Refer to Digital Audio AMP guide on Item 5 2 If AMP is damaged replace it with a new one 5 6 3 Service hint Any picture Remark PORTABLE function signal flow PWM FR FL Woofer 12 288 MHZ DSP IC501 176 PIN BGA IC201 Portable PTB_L R Interrupt controller CDROM x8 speed Decoder NAND Controller within BCH...

Page 44: ...H901 YES NO Is Vcc 10 V 18 V supplied to IC901 pin7 Is there about 2 5 V at IC951 pin1 D902 normal Replace D951 YES NO NO Check or replace D902 Is there about 2 5 V at IC941 Pin1 Replace IC941 YES NO D951 normal Replace D951 YES YES NO D933 normal Replace D933 YES NO Power line of main PCB is short NO 3 17 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 45: ...cc 10 V 18 V supplied to IC911 pin4 D903 normal YES NO Check or replace D903 Check P CTRL H signal from MCS Check PC902 Q901 normal Replace Q901 Check or replace Q911 YES NO D951 normal Replace D951 YES NO Is there about 2 5 V at IC951 pin1 Replace IC951 YES NO Q901 base H Power line of main PCB is short NO NO 3 18 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 46: ...31 pin4 H Check P CTRL H signal from MCU YES NO Check or replace IC931 No VFD YES D931 normal ZD931 normal Q300 Q301 normal Check or replace D931 Check or replace ZD931 Check or replace Q300 Q301 YES YES YES NO NO NO Check or replace VFD 3 19 ELECTRICAL TROUBLESHOOTING GUIDE ...

Page 47: ... MCS NO NO NO YES YES YES YES ELECTRICAL TROUBLESHOOTING GUIDE 2 MCS PART CHECK YES YES YES YES YES MCS PART CHECK OK Refer to SMPS troubleshooting Check and change IC101 X500 24 MHz X500 32 768 kHz Check the operation Check and change IC100 NO NO NO Check if voltage of CN102 Pin13 14 is 12 VA Check if IC101 have 1 2 VA output Check if IC100 have 3 3 VA output ...

Page 48: ... Pin B3 Check input data IC500 Pin F2 B3 B1 Replace IC500 Replace VFD300 Check each Pin voltage FLD light on OK OK OK Refer to SMPS troubleshooting Check CN102 Pin13 14 input voltage Check CN300 connection and power Pin14 16 17 VIN F VDD Check VFD300 voltage Pin27 26 31 32 VH over 27 V SW Signal F over 3 V is OK Check IC500 VFD300 data communication STB DATA CLK Check VFD300 Check IC500 NO NO NO N...

Page 49: ...e resistor output OK OK OK Check IC700 Pin21 CLK input Refer to SMPS troubleshooting Check CN102 Pin13 14 12 VA Check X700 12 288 MHz operation Check IC700 TAS5548 input data Pin24 25 PWM wave Check X700 12 288 MHz Check IC700 Check PWM modulator output FL Pin48 49 FR Pin46 47 Other output check Check CD Assy communication Pin22 23 24 Check IC700 input data NO NO NO NO NO NO NO NO YES YES YES YES ...

Page 50: ...roubleshooting Check each line resistor output voltage Replace the coil Check IC701 IC702 Pin29 30 31 36 37 38 input voltage Check PWM Modulator input IC701 Pin14 15 IC702 Pin5 6 14 15 Check IC701 IC702 Pin27 28 32 35 39 40 NO NO NO Check CN102 Pin13 14 12 VA Pin5 6 7 36 V Check IC701 IC702 Pin2 12 V input Check output line coil ...

Page 51: ...TUNER AUX FUNCTION CHECK FUNCTION CHECK Replace IC201 IC500 MLC3730 output data Check IC202 Pin18 19 ADC MIC_DATA SDOUT Pin17 BCK Pin16 LRCK Pin15 MCLK Check IC202 Pin8 ADC 3 3 V Pin13 14 25 DVCC 3 3 V Check CN102 Pin13 14 12 VA Check JK200 TU200 Check IC500 MLC3730 input data Check IC202 PCM1865 Pin18 19 output data Check IC202 Pin8 ADC 3 3 V Pin13 14 25 DVCC 3 3 V Check IC202 PCM1865 Pin27 28 29...

Page 52: ...IM driving Focus and tracking is ok Check Vcc of IC401 Replace IC500 Check Cristal X400 Is Motor ok about 12 Ω Is no signal at spk Can the disc insert Disc reading is ok Check the signal of IC401 Pin52 53 54 Check IC500 input output and control line Check the signal 16 9344 MHz at IC401 Pin51 Focus tracking sled signal is ok Is load ok NO NO NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES YES...

Page 53: ...ck USB jack JK301 JK302 Replace IC500 Check CON301 Check IC500 Pin U7 U8 A7 A8 Display NO FILE Check USB_5 V Display READ Plug in USB device Display NO USB Check USB_D D R383 384 NO NO NO NO YES YES YES YES YES YES YES Check USB audio file in USB device MP3 WMA file is playable ...

Page 54: ...35 IC504 pin19 Fig 2 SERVO IC500 pin M1 1 2 3 4 CD_BCK CD_LRCK CD_DATA MCS_MCLK MCS_BCK MCS_LRCK ADC_DATA Fig 3 1 AUDIO PATH IC500 pin N4 ICIC500 pin N1 ICIC500 pin N2 Fig 3 2 AUDIO PATH IC500 pin D2 IC500 pin E1 IC500 pin D1 IC500 pin E2 8 6 7 10 12 11 9 5 USB_5 V D D Fig 4 USB IC500 pin A8 IC500 pin A7 14 13 ...

Page 55: ...3 28 ...

Page 56: ...Motor Driver Tuner MIC PTB USB1 USB2 MAIN BT module AUX In SMPS Harness FFC FL RL WF JACK IC204 LED Driver IC200 MIC ADC 2P 3P Control 14P B TO B 8P 14P B TO B 8P 8P USB 17P 10P 8P USB 17P MD 10P 23P 10P 23P C C J65 O pt i on C J65 80 X 80 C J45 60 X 60 C J44 N ot appl y WIRING DIAGRAM ...

Page 57: ...ڮڊڮڞںڡڮ ٻڇگڮڭڊڪڟڊڦڧڞڊڝگڮںڟڡڱ ٻڇڝڊڜںڧڪڱٻکڤڜڨ ٻڍڊڌٻڴڠڦ ٻڠڮکڠڮںڟڇڲڮںکڟڇڲڮںګڰڇڲڮںڧڞڇڲڮںګڪ ٻکڠګڪڇڠڮڪڧڞڇڠگڰڨںگڪڨ ٻٻٻڟګڇڡڇڠڇڟڇڞڇڝڇڜ ٻڟڧ ٻڪڟڧڮڊڪڟګڮ ٻڟڭگڊڟڪڡڊ ڟڜڪڧ ڟڠڧڮڇ ٻڇ کڤګڮ ڭگڇ ڡڇ ٻ ٻڈڊچڮڍڟ ٻڜگڜڟڊڦڞڝڊڦڞڭڧںڨڲګ ٻڇڦڞڝڊڦڞڭڧڊڦڧڞڨڊڲڭںڟڞ ٻگڜڟںڟڞ ٻگڮڭںڟڞ ٻڳڰڜٻۍۊڡ ٻڌډڌ ٻڋډڍ ٻڄڧگڝګڃڲڮ CJ65 Total 2hch 900W CJ45 Total 2 1ch 720W 240 240 240 CJ44 Total 2ch 460W ٻڎڋڐڞڤ ٻۃێڼۇڡٻڝڨڌ ٻڪڟڊڤڟںڡڮ ٻڦڞڮڊڮڞںڍڡڮ ٻکڤٻڳڰڜ ٻڭڠکڰ...

Page 58: ...3 33 3 34 2 SMPS BLOCK DIAGRAM ...

Page 59: ...4 4 GOQT 5 4 4 5 6 PCNQI 5YKVEJ 75 75 8 8 2 67 670 4 29 4 TKXGT 8 A 8 2WNN WRࢲଡ 2 5 05 QVQT TKXGT 52 2 2 72 A 8 8 PCNQI 5YKVEJ 3 64 5YKVEJKPI 8 A 8 28 8 2 2 SMPS O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O ڞ ڞ ٻۉۊۄۏۋڪٻڐڑڥ ٻۉۊۄۏۋڪٻڐڑڥڞ 3 64 5YKVEJKPI ...

Page 60: ... 2 7 3 6 V VCC 3 37 V IC504 SDRAM 1 3 9 14 27 43 49 VDD VDDQ 3 0 3 6 V VCC 3 37 V IC700 Sound Audio Processor 9 14 50 DVDD 3 0 3 6 V AVDD 3 0 3 6 V DVDD 3 34 V AVDD 3 34 V IC701 IC702 Audio Amplifier PVDD 29 30 31 36 37 38 GVDD 1 22 VDD 2 PVDD 12 38 V GVDD 10 8 13 2 V VDD 10 8 13 2 V PVDD 36 20 V GVDD 11 82 V VDD 11 96 V Block Location No Spec Test Main C121 220 uF 10 V 3 06 C134 100 uF 16 V 5 16 ...

Page 61: ...3 39 3 40 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW NOTE Warning Parts that are critical with respect to risk of fire or electrical shock ...

Page 62: ...3 41 3 42 2 MAIN P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 63: ...3 43 3 44 3 FRONT P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 64: ...3 45 3 46 4 MIC P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...

Page 65: ...3 47 3 48 ...

Search results

Summary of Contents for CJ44

Reviews:

Brands by name

Popular brands

LG CJ44, Service Manual

Search results

Summary of Contents for CJ44

Reviews:

Brands by name

Popular brands