LG 22MA33N Service Manual Download Page 14 | Manualshive

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LGE Internal Use Only

Copyright ©

LG Electronics. Inc. All right reserved.

Only for training and service purposes

2. No Picture

Module

Back Light On ?

Check WLED_ENABLE high

R130 or R126

Check IC101

Replace Main Scaler IC

N

N

Check Panel clock

P601(#9,10)

Check IC101

Repair Main B/D

N

Check Panel power

P601(#27,28,29,30) 12V

IC801 Output 12V

Replace IC801

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

22” - LED Driver B’d P1101 #1

24” - LED Driver B’d P1100 #6 or #7

Check LED Driver IC1100

Replace LED Driver IC

N

Y

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Summary of Contents for 22MA33N

Page 1: ...ervice com Asia Oceania http biz lgservice com Internal Use Only Printed in Korea P NO CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL MFL67714488 1307 REV00 22MA33N 22MA33N PSQ 24MN33N 24MN33N PSQ LB32A LED 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 9 TROUBLE SHOOTING 13 BLOCK DIAGRAM 20 EXPLODED VIEW 21 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: ... 10 3 Power Voltage Standard input voltage 100 V 240 V 50 60 Hz Standard Voltage of each products is marked by mod els 4 Specification and performance of each parts are followed each drawing and specification by part number in accord ance with BOM 5 The receiver must be operated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other spe...

Page 7: ...lution Analog Max 1366 x 768 60 Hz Recommend 1366 x 768 60 Hz Digital Max 1366 x 768 60 Hz Recommend 1366 x 768 60 Hz 4 Operating Environment Temp 10 C 35 C Humidity 20 80 5 Storage Environment Temp 10 C 60 C non condensing Humidity 5 90 non condensing No Item Specification Remarks 1 Market Brazil 2 Broadcasting system ISDB T PAL M PAL N 3 Component Input 1EA Y Cb Cr Y Pb Pr 4 RGB Input RGB PC Ana...

Page 8: ... 50 00 74 25 HDTV 1080I 7 1920 1080 27 00 24 74 25 HDTV 1080P 8 1920 1080 33 75 30 00 74 25 HDTV 1080P 9 1920 1080 56 250 50 148 5 HDTV 1080P 10 1920 1080 67 43 67 5 59 94 60 148 35 148 50 HDTV 1080P 5 2 HDMI DTV 5 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...

Page 9: ...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 10: ...CE Screen size Color Characteristics 3 2 Function Check 3 2 1 Check display and sound Check Input and Signal items cf work instructions 1 TV 2 AV CVBS 3 COMPONENT 480i 4 RGB PC 1366 x 768 60 Hz 5 HDMI PC 1366 x 768 60 Hz 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 download M...

Page 11: ...y D book 4 0 Manual Download Model Name and Serial Number If the TV set is downloaded By OTA or Service man Some times 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 24MN33D or Serial...

Page 12: ...ration refer to the below table 4 6 Model Name SW Version Adjust check Press the Instart key of ADJ remote controller 4 6 1 Model Name SW Version Check 1 Check Model Name 2 Check S W Version Refer to the IC Ver in the BOM 4 6 2 Adjust Check 1 Check Country Group 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 HDMI is OK After che...

Page 13: ...e Level 5V Replace IC806 Recheck N Check IC802 Output Voltage Level 3 3V_ST Replace IC802 N Y Y Y Y Check IC801 Output Voltage Level 12V Replace IC801 N Y Check IC808 Output Voltage Level 2 5V Replace IC808 N Check X201 Clock 24MHz Replace X201 N Replace IC100 Flash Memory Y Check IC803 Output Voltage Level 1 15V Replace IC803 N Y Y Check IC807 Output Voltage Level 1 5V Replace IC807 N Check IC809...

Page 14: ...C101 Replace Main Scaler IC N N Check Panel clock P601 9 10 Check IC101 Repair Main B D N Check Panel power P601 27 28 29 30 12V IC801 Output 12V Replace IC801 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 22 LED Driver B d P1101 1 24 LED Driver B d P1100 6 or 7 Check LED Driver IC1100 Replace LED Driver IC N Y ...

Page 15: ... 3 3V 2 Check IC802 Output voltage 3 3V Replace IC802 Y N Check RF IC IC2600 I2C Signal SCL R2608 SDA R2609 Check IC101 N 1 Check RF IC L2604 Power 1 8V 2 Check IC805 Output voltage 1 8V Replace IC805 Y N N Y N Y 1 Check Demodulator L2619 Power 1 23V 2 Check IC809 Output voltage 1 23V Replace IC809 1 Check Demodulator L2621 Power 3 3V 2 Check IC802 Output voltage 3 3V Replace IC802 ...

Page 16: ... 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 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 JK2800 Replace JK2800 or Check Device Y N Y IC101 has problem Y Check Component Cable ...

Page 17: ...ve form of R4024 Hsync Wave form of R230 C206 Wave form of R228 C204 Wave form of R232 C208 Check input signal format Is it supported Check Hsync Vsync R266 R267 Replace R266 R267 Check signal RGB R228 R230 R232 C204 C206 C208 N Check JK400 Replace JK400 or Check Device Y N Y Replace R228 R230 R232 C204 C206 C208 N IC101 has problem Y Check RGB Cable Y Y ...

Page 18: ...and service purposes 6 No Video HDMI Check input signal format Is it supported Y Check JK501 for proper connection or damage Replace connector Y N Y Check HDMI Cable for damage or open connector Check I2C Signal JK501 15 16 Re download EDID data Y N Check HDCP Key IC101 Replace Scaler IC101 N ...

Page 19: ... 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 L700 L701 L706 L709 Y Replace IC700 N Check R870 Voltage Level 3 3V Y Replace IC807 3 3V N Y Check Signal from IC101 SDA SCL R703 R214 R707 R213 Y Replace IC101 N Replace connector or Speaker N ...

Page 20: ... 20 LGE Internal Use Only Copyright LG Electronics Inc All right reserved Only for training and service purposes BLOCK DIAGRAM ...

Page 21: ...d mechanical parts in this chassis have special safety related characteristics 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 IMPORT...

Page 22: ...VDD_2 38 NC_23 39 NC_24 40 NC_25 41 I O4 42 I O5 43 I O6 44 I O7 45 NC_26 46 NC_27 47 NC_28 48 NC_29 17 AL 3 NC_3 6 NC_6 16 CL 15 NC_10 14 NC_9 13 VSS_1 12 VDD_1 11 NC_8 10 NC_7 9 E 8 R 7 RB 4 NC_4 5 NC_5 25 NC_16 24 NC_15 23 NC_14 2 NC_2 22 NC_13 21 NC_12 1 NC_1 20 NC_11 19 WP 18 W PWM1 R148 33 C114 0 1uF RGB_DDC_SCL Q100 MMBT3904 NXP E B C PWM2 3 3V_Normal FE_TS_CLK FE_TS_SYNC C103 0 1uF PWM2 PF...

Page 23: ...H16 GND_47 H17 GND_48 H18 GND_49 H19 GND_50 J9 GND_51 J10 GND_52 J11 GND_53 J12 GND_54 J13 GND_55 J14 GND_56 J15 GND_57 J16 GND_58 J18 GND_59 J19 GND_60 J25 GND_61 K9 GND_62 K13 GND_63 K14 GND_64 H10 GND_65 K18 GND_66 K19 GND_67 K22 GND_68 L8 GND_69 L9 GND_70 J8 GND_71 L12 GND_72 L13 GND_73 L18 GND_74 L19 GND_75 M8 GND_76 K8 GND_77 M10 GND_78 M11 GND_79 L14 GND_80 M15 GND_81 M16 GND_82 M18 GND_83 ...

Page 24: ... RGB_DDC_SCL JP428 IC400 AP2191DSG 3 IN_2 2 IN_1 4 EN 1 GND 5 FLG 6 OUT_1 7 OUT_2 8 NC VA425 20V DSUB_HSYNC 2 E18 USB_DM 1 AL8 5V_Normal VA403 5 5V DSUB NON 28INCH MODEL RGB_DDC_SDA R401 75 DSUB NON 28INCH MODEL VA417 20V DSUB NON 28INCH MODEL VA401 20V DSUB NON 28INCH MODEL R418 47K DSUB NON 28INCH MODEL R408 10K DSUB NON 28INCH MODEL JP_GND3 VA406 5 5V DSUB NON 28INCH MODEL USB_DP 1 AL7 JP408 C4...

Page 25: ...GND 19 18 10 CK 4 D1 1 D2 17 9 D0 8 D0_GND 3 D2 16 7 D0 6 D1 15 CK _HDMI2 D0 _HDMI2 CK _HDMI2 D506 1 IP4283CZ10 TBA ESD_HDMI_NXP 3 GND_1 2 TMDS_CH1 4 TMDS_CH2 1 TMDS_CH1 5 TMDS_CH2 6 NC_1 7 NC_2 8 GND_2 9 NC_3 10 NC_4 VA513 20V OPT VA503 20V R521 2 7K VA502 20V VA510 20V OPT 3 3V_ST R528 1K Q505 MMBT3904 NXP E B C R529 10K HPD2 DDC_SCL_2 HDMI_CEC R520 100 D2 _HDMI2 D1 _HDMI2 R500 47K VA505 OPT 5V_...

Page 26: ... Q601 MMBT3904 NXP E B C RXA0 KEY1 JP611 R600 10K RXA3 3 3V_ST JP612 12V_PANEL_POWER P601 10031HR 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 JP603 R630 200 R604 270 1 10W 1 R610 330 1 10W 1 R625 5 6K R624 5 6K C605 0 1uF 16V C601 1000pF 50V R677 10K OPT R678 10K OPT 6 12 12 07 17 Change D601 3 IR LED and Control NC4_S7LRM Module 111116 100uF Ecap Deletio...

Page 27: ... BST1A 36 RESET 37 AD 38 CLK_I 39 GND_IO 40 VDD_IO 41 EP GND 0 1uF C707 16V JP705 1uF C725 10V R701 10K 0 1uF C712 50V OPT TP702 0 1uF C737 50V C711 22000pF 50V JP706 AUD_SCK C700 0 1uF 16V C743 1uF 25V AUD_MASTER_CLK R705 10K R718 12 SB_MUTE D710 KDS226 A AC C 19V R738 12K 3 3V_Normal AMP_SCL R704 12 AMP_RST 19V R720 12 0 1uF C740 50V NTP_MUTE R703 100 C705 33pF 50V OPT JP707 C735 0 47uF 50V D700...

Page 28: ...1 R848 15K 1 R828 100K 1 C833 10uF 10V R838 2 7K 1 C811 0 1uF 50V R846 47K 1 C849 10uF 10V OPT C807 0 1uF 50V R842 1K 1 C824 0 1uF 16V 3 3V_Normal R810 10K L804 10uH IC809 TJ4220GDP ADJ 3 VIN3 2 EN2 4 NC4 1 NC_1 5 NC_2 6 VOUT 7 ADJ SENSE 8 GND 9 EP GND C808 0 1uF 50V C848 0 01uF 50V L802 10uH C818 10uF 16V Q804 PMV48XP G D S C810 0 1uF 50V C820 10uF 16V Q801 MMBT3904 NXP E B C C801 10uF 25V OPT C8...

Page 29: ...28 C1113 10uF 25V 21 6 26 28 C1119 100pF 50V 21 6 26 28 BLU_CURRENT_CTL R1103 10K 1 16W 21 6 26 28 C1121 4 7uF 50V 23 6 28 BOE JP1102 JP1101 C1137 1uF 50V 21 6 26 28 R1125 24K 1 23 6 28 BOE 24V_BLU R1109 30K 1 16W 21 6 26 28 MULTI_ON JP1106 C1138 1uF 50V 21 6 26 28 D1101 100V BR210 21 6 26 28 R1122 100K 23 6 28 BOE R1108 51K 1 16W 21 6 26 28 R1104 470K 1 16W 21 6 26 28 R1124 1 5K 1 23 6 28 BOE R11...

Page 30: ...U6 B8 DQU7 A3 VREFCA M8 VREFDQ H1 ZQ L8 VDD_1 B2 VDD_2 D9 VDD_3 G7 VDD_4 K2 VDD_5 K8 VDD_6 N1 VDD_7 N9 VDD_8 R1 VDD_9 R9 VDDQ_1 A1 VDDQ_2 A8 VDDQ_3 C1 VDDQ_4 C9 VDDQ_5 D2 VDDQ_6 E9 VDDQ_7 F1 VDDQ_8 H2 VDDQ_9 H9 NC_1 J1 NC_2 J9 NC_3 L1 NC_4 L9 NC_6 T7 VSS_1 A9 VSS_2 B3 VSS_3 E1 VSS_4 G8 VSS_5 J2 VSS_6 J8 VSS_7 M1 VSS_8 M9 VSS_9 P1 VSS_10 P9 VSS_11 T1 VSS_12 T9 VSSQ_1 B1 VSSQ_2 B9 VSSQ_3 D1 VSSQ_4 D...

Page 31: ... C2647 0 1uF 16V VA2601 5 5V IF_AGC L2611 270nH C2609 100pF 50V C2617 4 7uF 10V L2619 BLM18SG121TN1D C2603 100pF 50V C2668 0 1uF 16V R2622 270 DIF_P R2621 75 C2653 56pF 50V C2619 0 1uF 16V C2633 1000pF 50V R2617 75 C2607 20pF 50V FE_TS_VAL_ERR C2649 27pF 50V C2606 0 1uF 16V C2635 91pF 50V R2610 470 C2623 56pF 50V SWITCH_3 3V C2643 0 1uF 16V C2631 3pF 50V SDA R2630 0 1 10W 5 X2600 24MHz 4 GND_2 1 X...

Page 32: ...P2815 R2841 10K JP2813 COMP_Y AV_CVBS_IN ZD2806 5 6B C2838 1000pF 50V OPT R2833 12K JP2814 ZD2802 5 6B R2842 1K R2825 470K OPT JK2800 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 SPRING_1 4C RD CONTACT_1 5D WH O SPRING 4E RD CONTACT_2 5E RD O SPRING_2 6E RD E LUG ZD2805 5 6B JP2811 R2831 10K R2834 12K COMP_L_IN C2837 1000pF 50V OPT D2814 5 6...

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