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LG 24MA32D, Service Manual

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LG 24MA32D Service Manual Download Page 21

- 21 -

LGE Internal Use Only

Copyright  © 

  LG Electronics. Inc. All right reserved. 

Only for training and service purposes

8. No Audio

Make sure you can’t hear any audio and 

Device support the audio signal normally.

Check Speaker and 

its wire connection (P700)

and the resistance 

Check Signal from IC700

L702,L703, L704, L705

Y

Replace IC700

N

1.Check C820 Voltage Level (19V)

2. Check Audio Amp(IC700) Power (3.3V)

Y

Replace IC700(19V), IC2602(3.3V)

Or Adapter

N

Y

Check Signal from IC101

SDA/SCL

(R703/R214, R707/R213)

Y

Replace IC101

N

Replace connector or Speaker

N

Summary of Contents for 24MA32D

Page 1: ...Printed in Korea P NO CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL MFL67580620 1206 REV00 24MA32D 24MA32D PUN LD02M LED LCD TV ...

Page 2: ...s Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 14 BLOCK DIAGRAM 22 EXPLODED VIEW 23 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ... Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a return path to the chassis the ...

Page 4: ...n your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge b...

Page 5: ...e solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced...

Page 6: ...erated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC specification 4 Module Specification 4 1 General Features HM236WU1 300 4 2 Optical Spec No Item Specification Unit Remark 1 Panel Size 599 44 mm 23 6 inches 2 Panel Type TN 3 Operating Mode Normally White 4 Backlight Unit W...

Page 7: ...ving system ATSC NTSC M 4 Component Input 1EA Y Cb Cr Y Pb Pr 5 CVBS Input 1EA NTSC 1 System Rear NTSC CVBS Video input is used by common port with Component 6 RGB Input RGB PC Analog D SUB 15Pin 7 HDMI Input 1EA HDMI1 Rear HDMI version 1 4 support PC Support HDCP 8 Audio Input 2EA RGB DVI Audio Component CVBS L R Input CVBS Audio input is used by common port with Component 9 USB 1EA Picture Music...

Page 8: ... non condensing Humidity 5 90 non condensing 6 Timing 6 1 RGB HDMI PC No Resolution H freq kHz V freq Hz Pixel clock MHz Remark 1 720 400 31 468 70 080 28 321 2 640 480 31 469 59 940 25 175 3 640 480 37 500 75 000 31 500 4 800 600 37 879 60 317 40 000 5 800 600 46 875 75 000 49 500 6 1024 768 48 363 60 004 65 000 7 1024 768 60 023 75 029 78 750 8 1152 864 67 500 75 000 108 000 9 1280 720 45 000 60...

Page 9: ... 148 50 HDTV 1080P 6 2 HDMI DTV 6 3 Component No Specification Remark Resolution H freq kHz V freq Hz Pixel clock MHz 1 720 480 15 730 59 940 13 500 SDTV DVD 480I 525I 2 720 480 15 750 60 000 13 514 SDTV DVD 480I 525I 3 720 576 15 625 50 000 13 500 SDTV DVD 576I 625I 50Hz 4 720 480 31 470 59 940 27 000 SDTV 480P 5 720 480 31 500 60 000 27 027 SDTV 480P 6 720 576 31 250 50 000 27 000 SDTV 576P 50Hz...

Page 10: ...XX bin by clicking Read 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD epk file download 1 Make New folder named LG_DTV and put ISP file epk in the folder 2 Put the USB Stick to the USB socket 3 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick is Low it didn t work But your downloaded version is High U...

Page 11: ...1 10 HDMI2 20 Check sum HDMI1 F6 HDMI2 E6 3 3 Function Check 3 3 1 Check display and sound Check Input and Signal items cf work instructions 1 TV 2 AV SCART CVBS 3 COMPONENT 480i 4 RGB PC 1920 x 1080 60Hz 5 HDMI1 2 6 PC Audio In Display and Sound check is executed by Remote controller Caution Not to push the INSTOP KEY after completion if the function inspection NO Item CMD 1 CMD 2 Data 0 Enter Ad...

Page 12: ... book 4 0 Manual Download Model Name and Serial Number If the TV set is downloaded By OTA or Service man Sometimes model name or serial number is initialized Not always There is impossible to download by bar code scan so It need Manual download 1 Press the Instart key of ADJ remote controller 2 Go to the menu Model Number D L like below photo 3 Input the Factory model name ex M2352D PZN or Serial ...

Page 13: ...p 2 Check Area Option 3 Check Tool Option Refer to the BOM Comments 4 Check Adjust ADC Comp RGB is OK 5 Check EDID RGB HDMI1 2 is OK After check all Press the EXIT key of ADJ remote controller to go out SVC menu 4 7 Outgoing condition Configuration After all function test press IN STOP Key by SVC Remote controller And make Outgoing Condition G WUG Gv XG G G XUG Gv YG G G YUG Gv ZG G G ZUG Gv G G G...

Page 14: ...heck IC802 output Voltage Level 5V Replace IC802 Recheck N Check IC2602 Output Voltage Level 3 3V_ST Replace IC2602 N Y Check IC806 Output Voltage Level 1 24V Replace IC806 Recheck N Y Y Check IC810 Output Voltage Level 2 5V Replace IC810 Recheck N Y Check IC807 Output Voltage Level 1 5V Replace IC807 Recheck N Y Check X201 Clock 24MHz Replace X201 N Check X201 Clock 24MHz Replace X201 N Replace I...

Page 15: ... R1127 Check IC101 Replace Main Scaler IC N N Check Panel clock P1002 10 11 22 23 Check IC101 Repair Main B D N Check Panel power P1002 1 2 3 5V IC802 Output 5V Replace IC802 N Y Replace T con Board or module Check FFC Cable for damage or open conductors Replace Cable N Y Y Y Check LED Driver output P1101 P1103 1 2 5 6 Check LED Driver IC1100 Replace LED Driver IC N Y ...

Page 16: ...heck RF Cable Y 1 Check Tuner TU2601 or 02 or 03 5 Power 3 3V 2 Check IC803 Output voltage 3 3V Replace IC803 Y N Check Tuner TU2601 or 02 or 03 I2C Signal SCL R2609 SDA R2610 Check IC101 N 1 Check Tuner TU2601 or 02 or 03 7 Power 1 8V 2 Check IC805 Output voltage 1 8V For TU2601 check 13 Power 1 23V and IC806 also Replace IC805 Replace IC806 Y N Check Tuner TU2601 or 02 or 03 I2C Signal SCL R2609...

Page 17: ... for training and service purposes 4 No Video Analog Check RF Cable Check Tuner TU3701 SIF 9 VIF 11 Replace Tuner TU3701 Recheck Y N 1 Check Tuner TU3701 3 Power 5V 2 Check IC802 Output voltage 5V Replace IC802 Y N Check Tuner TU3701 I2C Signal SCL R3702 SDA R3701 Check IC100 Y N ...

Page 18: ...t Check input signal format Is it supported Check signal R239 R237 R241 C220 C218 C222 Replace R239 R237 R241 C220 C218 C222 Y N Check JK400 Replace JK400 or Check Device Y N Y IC101 has problem Y Check Component Cable Wave form of C220 Wave form of C218 Wave form of C222 Wave form of Comp Y Wave form of Comp Pb Wave form of Comp Pr ...

Page 19: ... it supported Check Hsync Vsync R4024 R4025 Replace R4024 R4025 Check signal RGB R228 R230 R232 C204 C206 C208 N Check P400 Replace P400 or Check Device Y N Y Replace R228 R230 R232 C204 C206 C208 N IC101 has problem Y Check RGB Cable Y Y Wave form of R4025 Vsync Wave form of R4024 Hsync Wave form of R230 C206 Wave form of R228 C204 Wave form of R232 C208 ...

Page 20: ... service purposes 7 No Video HDMI Check input signal format Is it supported Y Check JK600 JK601 for proper connection or damage Replace connector Y N Y Check HDMI Cable for damage or open connector Check I2C Signal JK601 15 16 Re download EDID data Y N Check HDCP Key IC101 Replace Scaler IC101 N ...

Page 21: ...support the audio signal normally Check Speaker and its wire connection P700 and the resistance Check Signal from IC700 L702 L703 L704 L705 Y Replace IC700 N 1 Check C820 Voltage Level 19V 2 Check Audio Amp IC700 Power 3 3V Y Replace IC700 19V IC2602 3 3V Or Adapter N Y Check Signal from IC101 SDA SCL R703 R214 R707 R213 Y Replace IC101 N Replace connector or Speaker N ...

Page 22: ... 22 LGE Internal Use Only Copyright LG Electronics Inc All right reserved Only for training and service purposes BLOCK DIAGRAM ...

Page 23: ...ristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE 300 200 120 900 400 910 540 820 121 800 810 510 301 3...

Page 24: ... LVA1P AC25 LVA1N AB24 LVA2P AD25 LVA2N AC24 LVA3P AE23 LVA3N AC23 LVA4P AC22 LVA4N AD23 LVB0P V23 LVB0N U24 LVB1P V25 LVB1N V24 LVB2P W25 LVB2N W23 LVB3P AA23 LVB3N Y24 LVB4P AA25 LVB4N AA24 LVACKP AE24 LVACKN AD24 LVBCKP Y23 LVBCKN W24 GPIO196 T25 GPIO193 U23 GPIO194 T24 GPIO195 T23 IC101 LGE2111A T8 EU BRA AUS PCMDATA 0 GPIO126 W21 PCMDATA 1 GPIO127 AA18 PCMDATA 2 GPIO128 AB22 PCMDATA 3 GPIO120...

Page 25: ... AVDD_AU33 V7 AVDD_EAR33 W7 VDDP_1 R19 VDDP_2 T19 AVDD_LPLL_1 W18 AVDD_LPLL_2 W19 VDDP_NAND V19 AVDD_DDR0_D_1 J17 AVDD_DDR0_D_2 K15 AVDD_DDR0_D_3 K16 AVDD_DDR0_C L15 AVDD_DDR1_D_1 K17 AVDD_DDR1_D_2 L17 AVDD_DDR1_D_3 M17 AVDD_DDR1_C L16 GND_EFUSE E9 GND_1 A23 GND_2 B17 GND_3 C23 GND_4 A5 GND_5 C11 GND_6 C19 GND_7 C22 GND_8 D14 GND_9 D18 GND_10 D19 GND_11 E17 GND_12 E18 GND_13 E19 GND_14 E22 GND_15 ...

Page 26: ...RS232C apply 3 E_SPRING 6 T_TERMINAL 7 B_TERMINAL 5 T_SPRING 4 R_SPRING 8 G_SPRING COMP_DET C401 18pF 50V OPT C408 1000pF 50V OPT JK401 KJA PH 1 0177 3 M3_DETECT 4 M4 5 M5_GND 1 M1 6 M6 R413 10K IC400 AP2191DSG 3 IN_2 2 IN_1 4 EN 1 GND 5 FLG 6 OUT_1 7 OUT_2 8 NC 5V_GENERAL R421 0 R420 0 OPT JK400 PPJ234 05 5A GN O SPRING 6A GN E LUG 4A GN CONTACT 7B BL E LUG S 5B BL O SPRING 7C RD E LUG S 5C RD O ...

Page 27: ...SLOT CI_TS_DATA 1 PCM_5V_CTL CI_MDI 4 IC500 74LVC1G32GW CI_SLOT 3 GND 2 A 4 Y 1 B 5 VCC 3 3V_CI CI_CD1 PCM_A 11 PCM_A 5 R521 100 CI_SLOT CI_ADDR 3 PCM_A 3 5V_GENERAL IC502 TC74LCX244FT 0ITO742440D TOSHIBA CI_SLOT 3 2Y4 2 1A1 4 1A2 1 1OE 6 1A3 5 2Y3 7 2Y2 8 1A4 9 2Y1 10 GND 11 2A1 12 1Y4 13 2A2 14 1Y3 15 2A3 16 1Y2 17 2A4 18 1Y1 19 2OE 20 VCC P500 10067972 000LF CI_SLOT G1 G2 57 21 52 16 10 47 41 5...

Page 28: ...601 SN324 EU 3 NON_INV_IN1 2 INV_IN1 4 VCC 1 OUT1 6 INV_IN2 5 NON_INV_IN2 7 OUT2 8 OUT3 9 INV_IN3 10 NON_INV_IN3 11 GND 12 NON_INV_IN4 13 INV_IN4 14 OUT4 R646 62K EU C602 0 1uF 50V EU R640 100 EU R619 10K EU R651 10K EU C605 33pF EU R672 10K OPT EU_SCART mute R630 220K EU R618 10K EU R671 10K OPT EU_SCART mute R629 180 EU R628 75 EU C609 1000pF 50V EU C601 330pF EU R610 2 2K EU Q610 MMBT3904 NXP E...

Page 29: ...ODES OPT JP707 D704 100V 1N4148W_DIODES OPT AMP_SDA SB_MUTE JP706 R706 47K M52 H P JACK R733 10K M52 H P JACK R738 12K R736 470 3 3V_AVDD C712 47uF 25V C715 0 1uF 50V C714 0 1uF 50V C713 47uF 25V R734 220K R769 100 R767 100 R768 100 SE 1 2 R724 1K M52 BUZZER R715 10K M52 BUZZER R723 0 OPT R722 0 M52 BUZZER R721 100 M52 BUZZER BU700 PKM13EPY 4002 B0 M52 BUZZER 1 2 5V_GENERAL 1 2 R702 2K M52 BUZZER ...

Page 30: ...2K R874 100 C836 10uF 10V IC800 MP1472GJ C452 Z 3 COMP 2 EN 4 FB 1 SS 5 GND 6 SW 7 IN 8 BST IC802 MP1472GJ C452 Z 3 COMP 2 EN 4 FB 1 SS 5 GND 6 SW 7 IN 8 BST IC806 MP1472GJ C452 Z 3 COMP 2 EN 4 FB 1 SS 5 GND 6 SW 7 IN 8 BST R855 2K 1 R848 560 1 R884 180K R885 180K R898 180K OPT R840 10K R843 1K R839 4 7K Q802 MMBT3904 NXP E B C 5V_GENERAL PANEL_CTL C882 1uF 25V C879 4 7uF 10V OPT 4 7uF R842 22K 5V...

Page 31: ...1000 1K Q1001 MMBT3904 NXP E B C 3 3V_ST LVA_2P LVB_1M C1001 0 1uF 50V LVB_0M KEY_SDA R1001 10K R1028 3 3K JP1001 JP1005 R1018 10K Q1002 MMBT3904 NXP IR_OUT E B C JP1002 R1033 0 OPT LVB_3M C1009 0 1uF 50V LVA_1P JP1006 JP1011 3 3V_ST IR_OUT JP1012 LVB_2M IR KEY1 R1027 100 LVA_0M JP1003 LVB_CKM LVB_0P 3 3V_ST JP1000 LVB_1P R1024 10K IR_OUT C1002 1000pF 50V C1013 1000pF 50V C1014 1000pF IR_OUT C1003...

Page 32: ...JP1102 JP1101 JP1100 VOUT R1136 0 R1135 1 5K 1 P1101 12507WR 06L 1 2 3 4 5 6 7 P1103 12507WR 06L 1 2 3 4 5 6 7 R1127 100 R1121 100 C1111 100pF 50V C1116 100pF 50V D1103 100V BR210 C1118 47uF 25V Q1103 AOD478 S D G C1124 33uF 100V C1127 1uF 100V C1128 1uF 100V C1129 1uF 100V OPT C1130 1uF 100V OPT R1138 510K 1 8W 1 9 11 LED DRIVER 11 10 27 Parallel 0ohm DEL 11 11 15 1K 100ohm 1000pF 100pF 11 11 15 ...

Page 33: ... VSSQ_7 F9 VSSQ_8 G1 VSSQ_9 G9 R1239 0 1 10W 5 IC101 LGE2111A T8 EU BRA AUS A_DDR3_A 0 A11 A_DDR3_A 1 C14 A_DDR3_A 2 B11 A_DDR3_A 3 F12 A_DDR3_A 4 C15 A_DDR3_A 5 E12 A_DDR3_A 6 A14 A_DDR3_A 7 D11 A_DDR3_A 8 B14 A_DDR3_A 9 D12 A_DDR3_A 10 C16 A_DDR3_A 11 C13 A_DDR3_A 12 A15 A_DDR3_A 13 E11 A_DDR3_A 14 B13 A_DDR3_BA 0 F13 A_DDR3_BA 1 B15 A_DDR3_BA 2 E13 A_DDR3_MCLK C17 A_DDR3_MCLKZ A17 A_DDR3_MCLKE ...

Page 34: ...ALID 19 MCLK 20 D0 21 D1 22 D2 23 D3 24 D4 25 D5 26 D7 27 D8 28 SHIELD C2611 22uF 10V TU2601 2 TDSN G301D DVB T2 Europe 1 NC_1 2 RESET 3 SCL 4 SDA 5 B1 3 3V 6 SIF 7 B2 1 8V 8 CVBS 9 NC_2 10 NC_3 11 NC_4 12 B3 3 3V 13 B4 1 23V 14 NC_5 15 GND 16 ERROR 17 SYNC 18 VALID 19 MCLK 20 D0 21 D1 22 D2 23 D3 24 D4 25 D5 26 D6 27 D7 28 SHIELD R2635 0 NON_A_DEMODE R2634 0 NON_A_DEMODE R2636 2K NON_A_DEMODE C26...

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