LG 22MT47A Service Manual Download Page 19 | Manualshive

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LGE Internal Use Only

Copyright ©

LG Electronics. Inc. All right reserved.

Only for training and service purposes

7. Abnormal screen (HDMI)-Main PCBA

Put into HDMI

cable completely?

Abnormal screen (HDMI)

YES

NO

NO

insulted HDMI cable

1

Change IC501

Is Input signal timing

and format in spec?

Change Timing according to

product spec, change format

under 8 bit in Ycbcr, Ypbpr, RGB

2

Is waveform at 10,12pin

of JK203?

3

Check Line between JK203 and IC501

is open or short, Another is

Change HDMI cable

NO

YES

YES

Is waveform at 1,3,4,6,7,9pin

Of JK203?

YES

4

Check Line between JK203 and IC501

is open or short, Another is

Change HDMI cable

NO

Can read EDID and

HDCP key though
16,15pin of JK203

Check Line between JK203 and IC501

is open or short, Another is

Change HDMI cable

YES

Is 5V at 19pin of JK203?

Check Line between JK203 and IC501

is open or short, Another is

Change IC501 or HDMI cable

5

YES

6

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Summary of Contents for 22MT47A

Page 1: ...tp eic lgservice 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 MFL68127295 1502 REV00 22MT47A 22MT47A PTP LW45A LED TV ...

Page 2: ...c 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 24 EXPLODED VIEW 25 SCHEMATIC CIRCUIT DIAGRAM APPENDIX ...

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: ...nt 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC specification NOTE Specifications and others are subject to change without notice for improvement 4 General specification 4 1 Operating Storage environment 4 2 RGB PC No Item Specification Remarks 1 Supported Sync Type Separate Sync RGB 2 Operating Frequency Analog Horiz...

Page 7: ... Audio Output RF AV HDMI Audio Output Rear 1EA 9 HDMI Input HDMI DTV Rear 1EA 10 Audio Input 1EA AV RGB PC AV L R Input 1EA MT47A MT48A L R Input 2EA MT48N AV1 AV2 RGB PC L R Input 1EA MT47A MT48A L R Input 1EA MT48N Only AV1 5 RGB PC Input PC No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed Remark 1 640 480 31 469 59 94 25 175 2 800 600 37 879 60 317 40 0 3 1024 768 48 363 60 0 65 0 4 ...

Page 8: ... 27 027 SDTV 480P 6 720 576 31 25 50 00 27 SDTV 576P 7 1280 720 44 96 59 94 74 176 HDTV 720P 8 1280 720 45 60 00 74 25 HDTV 720P 9 1280 720 37 5 50 00 74 25 HDTV 720P 10 1920 1080 28 125 50 00 74 25 HDTV 1080I 11 1920 1080 33 72 59 94 74 176 HDTV 1080I 12 1920 1080 33 75 60 00 74 25 HDTV 1080I 13 1920 1080 56 25 50 00 148 5 HDTV 1080P 14 1920 1080 67 432 59 94 148 350 HDTV 1080P 15 1920 1080 67 5 ...

Page 9: ...solution through information sharing without any necessity of user input It is a realization of Plug and Play 3 2 2 Equipment Since EDID data is embedded EDID download JIG HDMI cable and D sub cable are not need 3 2 3 Download method The EDID data is automatically saved 3 2 4 EDID DATA 21MT47A 22MT47A 22MT48A 22MT48N RGB PC 21MT47A 22MT47A 22MT48A 22MT48N HDMI NO Item CMD 1 CMD 2 Data 0 Enter Adju...

Page 10: ...of the module surface 80 100 3 Aging time 1 After Aging Start Keep the Power ON status during 5 Minutes 2 In case of LCD Back light on should be checked using no signal or Full white pattern 4 1 2 Equipment 1 Color Analyzer CA 210 NCG CH 9 WCG CH12 LED CH14 2 Adj Computer During auto adj RS 232C protocol is needed 3 Adjust Remocon 4 Video Signal Generator MSPG 925F 720p 204 Gray Model 217 Pattern ...

Page 11: ...tes are drifted about 0 007 after 30 mins heat run So checking color coordinate within 5 min at total assembly line consider x y coordinates might be up to 0 007 than x y target of each color temperature 5 Tool Option selection Method Press ADJ key on the Adjustment remote control then select Tool option 6 Ship out mode check In stop After final inspection press IN STOP key of the Adjustment remot...

Page 12: ...n surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging time 1 After Aging Start Keep the Power ON status during 5 Minutes 2 In case of LCD Back light on should be checked us ing no signal or Full white pattern 10 2 2 Equipme...

Page 13: ...s of IC701 If there is any problem at Line Change IC701 NO Check Line short or open between IC501 and X501 Change IC501 or change X501 1 2 4 Is 1 8V at C745 is 1 25V at C742 3 YES check the Lines of IC711 IC704 If there is any problem at Line Change IC704 IC706 NO Insert F W is 3 3V at 1pin of P120 when push power key Is 0v at 2pin of P120 Change control Or check Line short or open of P120 5 is th...

Page 14: ...1 IC704 or change IC501 NO 1 2 is 3V at 1pin of IC601 YES It is not over 3V at 1pin of IC601 Change Q601 Or check Line short or open between R603 and 95pin of IC501 Change IC 501 4 3 NO check open or short at Line or change Adapter is 5V at 1pin of P101 If is not under 1 5V at R722 change Q721 or check open and short of Line among Q720 and Q721 If is under 4 5V at L110 Check open and short Of line...

Page 15: ...O YES If LVDS cable isn t insulted enough Insult LVDS cable until locking hook If LVDS cable have damage Change LVDS cable 1 Change module WAVEFORMS 3 Is 12V at 1pin of P101 If is not under 1 5V at R722 change Q721 or check open and short of Line among Q720 and Q721 If is under 11V at L110 Check open and short Of line between L110 and P101 2 3 NO Check open and short Of line between Q720 and P101 ...

Page 16: ...7pin of TU401 2 Is I2C waveform At 3 4pin of TU401 3 4 Is IF waveform at 43 44 pin of IC501 NO NO 3 3Pin of TU401 SCL 4Pin of TU401 SDA 4 43 44pin of IC501 If 1 7V is not at plus pin of TU401 check It is over 3V at 2pin of IC711 if it is not Check Line between TU401 and IC711 is open or short Another is change IC711 or TU401 Check Line between TU401 and IC501 is open or short Another is change IC5...

Page 17: ...V Main PCBA Put into AV cable completely Abnormal screen AV YES NO NO Insult AV cable tight 1 Change IC501 WAVEFORMS Is Input signal timing and format in spec Change Timing to 480I 576I Or change format CVBS 2 Is waveform at R505 3 Check Line between JK101 and IC501 is open or short Another is change AV cable NO YES YES R505 CVBS 3 ...

Page 18: ...o RGB cable completely Abnormal screen RGB PC YES NO NO insult RGB cable tight 1 Change IC501 WAVEFORMS Is Input signal timing and format in spec Change Timing according to product spec Or change format to RGB 2 Is waveform at R501 R502 R504 3 Check Line between JK201 and IC501 is open or short Another is Change RGB cable NO YES YES 3 R502 G R604 R R601 B ...

Page 19: ...er 8 bit in Ycbcr Ypbpr RGB 2 Is waveform at 10 12pin of JK203 3 Check Line between JK203 and IC501 is open or short Another is Change HDMI cable NO YES YES Is waveform at 1 3 4 6 7 9pin Of JK203 YES 4 Check Line between JK203 and IC501 is open or short Another is Change HDMI cable NO Can read EDID and HDCP key though 16 15pin of JK203 Check Line between JK203 and IC501 is open or short Another is...

Page 20: ...C301 If 3V is not plus 30pin of IC301 check It is over 3V at L301 if it is not Check Line between L301 and IC301 is open or short Another is change IC701 IC301 NO 3 4 YES Is I2C waveform at 10 11pin of IC301 Check Line between IC301 and IC501 is open or short Another is change IC301 or IC501 NO 5 Is I2S waveform at R301 R302 R303 R304 6 Check Line between IC301 and IC501 is open or short Another i...

Page 21: ...V at 7pin of TU401 Is I2C waveform At 3 4pin of TU401 Is IF waveform at 43 44 pin of IC501 NO NO 3 3Pin of TU401 SCL 4Pin of TU401 SDA 4 43 44pin of IC501 If 1 7V is not at plus pin of TU401 check It is over 3V at 2pin of IC711 if it is not Check Line between TU401 and IC711 is open or short Another is change IC401 or TU401 Check Line between TU401 and IC501 is open or short Another is change IC50...

Page 22: ...ing and service purposes 10 Abnormal sound AV Main PCBA Put into AV cable completely Abnormal sound AV YES NO Insult AV cable tight 1 Change IC501 WAVEFORMS Is waveform at C520 C521 2 Check Line between JK101 and IC501 is open or short Another is change AV cable NO YES C520 C521 audio in 2 ...

Page 23: ...r 8 bit in Ycbcr Ypbpr RGB 2 Is waveform at 10 12pin of JK203 3 Check Line between JK203 and IC501 is open or short Another is Change HDMI cable NO YES YES Is waveform at 1 3 4 6 7 9pin Of JK203 YES 4 Check Line between JK203 and IC501 is open or short Another is Change HDMI cable NO Can read EDID and HDCP key though 16 15pin of JK203 Check Line between JK203 and IC501 is open or short Another is ...

Page 24: ... 24 LGE Internal Use Only Copyright LG Electronics Inc All right reserved Only for training and service purposes BLOCK DIAGRAM ...

Page 25: ...d 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 Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE 300 200 120 900 401 540 910 810 305 LV1 A2 535 820 800 ...

Page 26: ...ZD101 SD05 UDZS5 6B ZD102 SD05 UDZS5 6B C102 1000pF 50V C101 1000pF 50V D124 5 6V C125 4 7uF 10V C126 4 7uF 10V ZD103 SD05 COMPONENT_UDZS5 6B R145 75 COMPONENT ZD106 SD05 COMPONENT_UDZS5 6B COMMON_B LOUT R146 75 COMPONENT LIN ZD104 SD05 COMPONENT_UDZS5 6B ZD105 SD05 COMPONENT_UDZS5 6B JP108 JP107 ROUT RIN COMMON_R COMMON_VIN ROUT LOUT RIN LIN RXA3 RXACK RXA2 RXA3 RXA0 RXA0 RXA1 RXACK RXA1 JP112 RX...

Page 27: ... 15 RGB R203 91 RGB R214 1 0 COMPONENT R215 1 0 COMPONENT R216 1 0 COMPONENT D201 RGB D202 RGB D203 RGB D204 D205 D206 RGB D207 RGB D208 RGB D209 READY D231 HDMI2 D232 HDMI2 D233 HDMI2 D246 READY D247 READY D248 READY ZD220 READY ZD221 READY ZD222 READY ZD223 READY D241 HDMI1 D242 HDMI1 D243 HDMI1 5V_USB IC200 AP2191DSG USB_OCP 3 IN_2 2 IN_1 4 EN 1 GND 5 FLG 6 OUT_1 7 OUT_2 8 NC R211 47 C207 0 1uF...

Page 28: ... SPK_L SPK_L C308 22000pF 50V I2S_SCK C315 22000pF 50V R303 100 C325 390pF 50V R317 12 R324 4 7K C333 0 47uF 50V JP304 I2S_MCLK L306 10uH ABCO C319 22000pF 50V R315 12 R323 4 7K P301 SMAW250 H04R Non Box type 1 2 3 4 0 1uF C335 50V C314 1uF 10V I2S_WS R316 12 C328 390pF 50V AUAMP_SDA JP303 R309 4 7K C318 0 1uF 25V C326 390pF 50V 19V SPK_R SPK_L R304 100 C306 33pF 50V SW_RESET 0 1uF C330 50V I2S_SD...

Page 29: ...C413 1000pF 630V PAL C411 1000pF 630V PAL C414 1000pF 630V PAL TU402 TDSS H701F NTSC 5 B1 3 3V 11 DIF N 2 NC_2 10 DIF P 4 SDA 1 NC_1 9 IF_AGC 8 NC_5 3 SCL 7 NC_4 6 NC_3 12 SHIELD A1 A1 B1 B1 C403 20pF 50V TUNER C407 20pF 50V READY C406 20pF 50V READY C402 20pF 50V TUNER R413 1 33 NTSC R414 1 33 NTSC R412 1 1K NTSC R402 0 NTSC R401 0 NTSC TDJH G301D TU401 1 Y15_PAL_TUNER 47 SHIELD 6 IF P 7 IF N 8 S...

Page 30: ...I_DO 97 SPI_CZ 98 USB0_DM 99 USB0_DP 100 AVDD_MOD_4 101 GPIO63 102 GPIO64 103 TESTPIN 104 PWM0 GPIO26 105 PWM1 GPIO25 106 DDCA_CK 107 DDCA_DA 108 GPIO67 109 AVDD_DDR_2 110 SAR0 GPIO75 111 SAR1 GPIO74 112 SAR2 GPIO73 113 SAR3 GPIO72 114 GPIO68 115 GPIO69 I2S_OUT_MCK 116 GPIO70 117 IRIN 118 CEC 119 HWRESET 120 GND 121 HOTPLUG_D 122 RXCKN_D 123 RXCKP_D 124 RX0N_D 125 RX0P_D 126 DDCDD_DA 127 RX1N_D 12...

Page 31: ... GND R612 1 39K FHD_24 R611 1 0 FHD_24 5V_USB R628 0 LED_Driver_EN_3 3V R629 0 LED_Driver_EN_5V R612 5 39K FHD_22_HEESUNG R611 5 2 4K FHD_22_HEESUNG R623 0 2CH 4CH JP602 R625 0 LED Driver NC Pin 5 C613 1uF 100V MLCC_IN C608 68uF 35V NON_MLCC JP603 R634 0 INNOLUX C600 68uF 35V NON_MLCC C609 68uF 35V NON_MLCC C612 1uF 100V MLCC_IN C615 10uF 100V READY JP606 JP601 JP608 C611 1uF 100V C611_MLCC_IN R63...

Page 32: ...L_5V R727 1 15K 1 PANEL_5V R725 1 47K 1 PANEL_5V C745 10uF 10V L720 10uH R703 68 R721 68 R772 68 ZD700 5 6B 5V_USB_Zener_UDZS5 6B ZD701 15V READY R771 20K ZD702 5V C777 1uF 10V Q722 MMBT3904 NXP E B C R762 39K PANEL_12V R768 0 PANEL_5V R767 24K PANEL_12V D802 BAT54C PANEL_12V A2 C A1 R761 39K PANEL_12V R767 1 2K PANEL_5V C760 4 7uF 25V 4 7uF_25V_Madrian Not Used C754 10uF 10V C743 10uF 10V C742 10...

Page 33: ... JP804 R820 100 READY C814 1uF 50V BOOST R821 0 READY PWM_DIM L801 10uH BOOST C820 1uF 10V READY JP802 Q801 AOD478 BOOST S D G C802 10uF 25V BOOST R805 470K BOOST R813 30K BOOST 19V BOOST_EN C806 2200pF 50V BOOST D801 100V BR210 BOOST C815 1uF 50V READY C807 47pF 50V BOOST 24V_BLU C803 0 1uF 25V READY C809 0 1uF 25V BOOST R814 10 BOOST BLU_ON C821 0 1uF 25V BOOST R822 4 7K READY C816 270pF 50V BOO...

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