LG E2040S Service Manual Download Page 20 | Manualshive

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Copyright © 2010 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only
Only for training and service purposes

3. NO RASTER (OSD IS NOT DISPLAY)-MSTAR

1. Check

C416

C417

2. Check

X401

3. Trouble in Scaler IC

Scaler pin 63, 64
oscillates as
12MHz?

No Raster

(OSD Is Not Displayed)

Check connection line from
D-SUB to Scaler

Trouble in cable or LCD
module

NO

YES

YES

NO

Scaler IC
pin 14 H Sync ?
pin 15 V Sync?

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Summary of Contents for E2040S

Page 1: ...rth Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com COLOR MONITOR SERVICE MANUAL MODEL E2040S E2040S PNT A NAV for LGD TLA1 Sales Market CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL To apply the Novatek Chip Internal Use Only ...

Page 2: ...STICS 2 1 Viewing Angle by Contrast Ratio 10 Left Right 170 150 Top Bottom 160 140 2 2 Luminance 200Cd m2 6500K 150Cd m2 9300K 2 3 Contrast Ratio 700 Min 1000 Typ 3 SIGNAL Refer to the Timing Chart 3 1 Sync Signal Type Separate Sync Composite 3 2 Video Input Signal 1 Type R G B Analog 2 Voltage Level 0 7 Vp p 3 Input impedance 75 Ω 3 3 Operating Frequency Horizontal 30 83kHz Vertical 56 75Hz 4 Max...

Page 3: ...Copyright 2010 LG Electronics Inc All right reserved 3 LGE Internal Use Only Only for training and service purposes ...

Page 4: ...Copyright 2010 LG Electronics Inc All right reserved 4 LGE Internal Use Only Only for training and service purposes ...

Page 5: ...Copyright 2010 LG Electronics Inc All right reserved 5 LGE Internal Use Only Only for training and service purposes ...

Page 6: ...Copyright 2010 LG Electronics Inc All right reserved 6 LGE Internal Use Only Only for training and service purposes ...

Page 7: ... V Lines 59 94 525 480 10 2 33 3 H Pixels 31 5 37 5 840 640 16 64 120 640 x 480 V Lines 75 500 480 1 3 16 4 H Pixels 40 0 37 879 1056 800 40 128 88 800 x 600 V Lines 60 317 628 600 1 4 23 5 H Pixels 49 5 46 875 1056 800 16 80 160 800 x 600 V Lines 75 0 625 600 1 3 21 6 H Pixels 65 0 48 363 1344 1024 24 136 160 1024 x 768 V Lines 60 0 806 768 3 6 29 7 H Pixels 78 75 60 123 1312 1024 16 96 176 1024 ...

Page 8: ...Internal Use Only Only for training and service purposes DISASSEMBLY Set 1 Put the monitor on a soft flat 2 Press the release button 3 Consequently pull the base directly 4 The base 5 Use tool to open all latches 6 Put the front face down disassembly back cover ...

Page 9: ...Pull the key board out of bezel 8 Disassembly the LVDS cable 9 Disassemble the FFC cable and converter board to converter board cables 10 Unscrew the 2 screws on the converter board 11 Unscrew the 4 screws on the main board 12 Remove the main board and the power board 13 Remove the bezel 14 The panel Optional Optional ...

Page 10: ... Inc All right reserved 10 LGE Internal Use Only Only for training and service purposes 15 Rear cover and hinge ASS Y 16 Disassemble the rear cover and the hinge ASS Y 17 Disassemble the hinge and stand 18 Hinge top hinge and stand ...

Page 11: ...poses BLOCK DIAGRAM DDC DSUB PORT SCALAR NT68168FG B U401 DSUB CN101 Crystal 12MHZ X401 CN401 to Keyboard A D input control RGB H V SYN SCL SDA WP Serial Flash U402 To Inverter Block Brightness control CN302 to Panel LVDS output Panel Power sequence control circuit Block Q302 Q301 Power input CN702 LDO U701 3 3V ...

Page 12: ...d 12 LGE Internal Use Only Only for training and service purposes BLOCK DIAGRAM CONVERTER Converter Boost Circuit Ignition LED bar ON OFF circuit Current balance Control IC ta9690 Feedback circuit OVP circuit Current Feedback DIM circuit 12V ON OFF DIM ...

Page 13: ... Scalar gets the video signal converted analog to digital interpolates input to 1600 X 900 resolution signal and outputs 8 bit R G B signal to transmitter 2 Power Part This part consists of the one 3 3V regulators to convert power which is provided 5V in Power board 12V is provided for inverter board 5V is provided for LCD panel Also 5V is converted 3 3V by regulator Converted power is provided fo...

Page 14: ... Main board provides ENA signal to make the converter system On or Off 3 DIM circuit Main board provides PWM signal to make the light LED On or Off 4 IC ta9690 Converter controls IC the function provide PWM driver signal to Boost converter balance the LED current set the maximum output voltage of OVP 5 OVP circuit set the maximum output voltage of OVP through this voltage IC can neglect the OPEN s...

Page 15: ...mode to SPP for using the DOS EDID tool surely 2 EDID Write 1 Connect the signal line of monitor with DDC recorder 2 Choose the DDC RECORD program and it shows on the screen the choose the correct source base on the monitor 3 Click LoadFile then key in the manufacturer name model name product code then choose the correct model name base on the monitor as Fig 2 4 Scan serial No to DDC recorder by B...

Page 16: ... must be the same as Bar Code Week of Manufacture Year of Manufacture Checksum It must be the same as the last byte of data table as follows picture shows Above of all must be right then if it shows the green PASS it means record succeeds the red Fail means record fails Then check the power supply and signal line and ensure they are connected well then do DDC record again from the third step Fig 2...

Page 17: ...d below a CLEAA ETI NO b Auto Color NO c AGING Select Aging mode on off d PANEL Used panel type e NVRAM INIT NO f R G B 9300K Allows you to set the R G B 9300K value manually g R G B 6500K Allows you to set the R G B 6500K value manually h R G B Offset Allows you to set the R G B Offset value manually Analog Only i R G B Gain Allows you to set the R G B Gain value manually Analog Only e R G B sRGB...

Page 18: ...ce purposes TROUBLESHOOTING GUIDE No Power Power Indicator Off Please reinsert and make sure the AC of 100 240V is normal Measure U701 PIN2 3 3V Check the Adapter Inverter section Check CN702 or replace U701 NO NO YES YES 1 NO POWER Check X401 oscillate waveforms are normal Replace X401 Replace U401 NO YES ...

Page 19: ...ses 2 NO RASTER OSD IS NOT DISPLAY LIPS LIPS YES YES YES Check CN702 PIN 8 5V NO Check BL ON OFF pulse as contacting scope No Raster OSD Is Not Displayed Check U701 PIN 2 3 3V Check CN702 PIN 8 5V Check power board and find out a short point as penning each power line 1 Check U701 2 Check C706 C707 C708 C709 NO NO ...

Page 20: ...service purposes 3 NO RASTER OSD IS NOT DISPLAY MSTAR 1 Check C416 C417 2 Check X401 3 Trouble in Scaler IC Scaler pin 63 64 oscillates as 12MHz No Raster OSD Is Not Displayed Check connection line from D SUB to Scaler Trouble in cable or LCD module NO YES YES NO Scaler IC pin 14 H Sync pin 15 V Sync ...

Page 21: ...ctronics Inc All right reserved 21 LGE Internal Use Only Only for training and service purposes 4 TROUBLE IN DPM Trouble in DPM Scaler IC pin 14 H Sync pin 15 V Sync Check H V sync line Trouble in cable or LCD module NO YES ...

Page 22: ...ning and service purposes 5 POWER Replace panel Check Vout about 35V Check L801 D801 Q801 NO YES Check CN701 12V Check FB701 C716 YES NO YES No Power Power Indicator Off Check AC line volt Check the adapter Check AC line AC socket Replace adapter NO YES NO Check main board Check main board NO ...

Page 23: ...rnal Use Only Only for training and service purposes 6 RASTER Check U401 X401 Check DIM Check U401 Check Q301 Q302 NO Raster Lamp Off Check CN702 PIN8 5V Check ON OFF signal Check U705 Check Interface section or main board NO NO NO YES YES Check PANEL_VCC YES NO YES ...

Page 24: ...pyright 2010 LG Electronics Inc All right reserved 24 LGE Internal Use Only Only for training and service purposes WIRING DIAGRAM 095G8018 3DJ02 095G176J 4H01 095G820H 6D522 095G802210W506 095G801412X933 ...

Page 25: ...l safety related characteristics These parts are identified by in the 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 110 100 050 070 080 020 030 040 090 120 010 060 ...

Page 26: ...16W ZD104 RLZ5 6B R110 470OHM1 16W C114 47N16V VGA_G DSUB_SDA VGA_B ESD_VCC C104 22P 50V DSUB_H 5 DSUB_G 5 DDC_WP 5 DSUB_R 5 C101 NC R105 100OHM1 16W U101 NC M24C02 WMN6TP 1 2 3 4 5 6 7 8 A0 A1 A2 VSS SDA SCL WP VCC R103 100OHM1 16W R141 1K1 16W 5VCC VGA_R DDC_A_SDA DSUB_SOG 5 VGA_R C105 5PF 50V R109 100OHM1 16W FB103 BEAD 1 2 R112 75OHM1 16W R108 75OHM1 16W C102 47N16V FB102 BEAD 1 2 DSUB_SCL DSU...

Page 27: ...LVB2M T7P 5 RXE1 T4P 5 R302 220 OHM 1 4W C301 100N 16V 5V RXOC LVB1M RXOC T2M 5 TCLK1P 2P 5 PPWR_ON 5 LVBCKM LVA0M T6P 5 RXO3 U301 NC AO4411 1 2 3 4 8 7 6 5 S S S G D D D D T6M 5 T3P 5 R304 22K1 16W RXE0 RXEC RXE1 R308 10K1 16W 5V 4 5 RXOC RXO3 T1M 5 RXO0 RXO1 RXO0 RXE3 C306 22uF 10V LVACKP LVB2P LVA2M RXO0 LVA1P FB301 120 OHM 1 2 T0P 5 LVACKM LVACKP R306 56K 1 16W D RXE3 AO3401L PANEL_VCC LVA0M R...

Page 28: ...N 4 FB701 300OHM 4A C721 100N 16V CN702 CONN 1 2 3 4 5 6 7 8 9 10 11 12 5V VCC3 3 R726 100K1 16W C716 100N 16V 5VCC D702 SM340A 1 2 C702 100N 16V VCC3 3 5V 12V R714 1 3K 1 VCC3 3 R722 NC 0R05 1 10W BKLT VBRI Q701 LMBT3904LT1G FB702 120 OHM 5VCC 3 5 on_BACKLIGHT 5 C715 180uF 16V VCC1 8 C709 100N 16V R713 6K8 1 16W 1 C719 100N 16V L701 22uH C722 150pF 50V D705 SM540A C717 NC 1nF 16V R706 100OHM1 16W...

Page 29: ...0OHM R425 NC 2K2 1 16W 5 T5M 3 C419 100N 16V T3M 3 C418 NC 0 22UF 10V R420 100OHM 5 1 8W DSUB_SOG 2 SPI_SO TC_PW DVDD Q403 NC LMBT3906LT1G 1 2 3 C435 100N 16V T6P 3 CVDD_1 8 R428 NC 4 7K 1 16W LED_GRN BLUE C401 10uF 10V C0805 PPWR_ON 3 U403 NC AT24C04BN 1 2 3 4 5 6 7 8 A0 A1 A2 GNDSDA SCL WP VCC DSUB_G 2 C413 100N 16V Q401 LMBT3906LT1G 1 2 3 R429 NC 4 7K 1 16W MSCL KEY2 R432 10K1 16W C431 100N 16V...

Page 30: ...N2 ISEN3 ISEN4 GNDA ISEN8 ISEN6 ISEN7 OVP ISET RT ENA ISW ISEN5 LDR VREF GNDP VIN SEL COMP SSTCMP NC STATUS R863 NC R834 NC C801 33uF 100V R839 NC R843 NC R862 NC DIM CN804 CONN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Vout COMP2 CN803 N C R804 1 OHM R815 NC R852 NC R858 NC C813 NC R820 NC C805 0 1UF50V R869 NC R867 NC C815 NC LDR VINA C804 NC OVP1 R837 NC R825 820 OHM 1 1 10W R873 1K 1 4W R832 NC R859 NC...

Page 31: ... 1 2 3 4 5 6 7 8 9 10 ISEN1_3 CN810 NC 1 2 3 4 5 6 ISEN1_7 ISEN2_4 ISEN1_1 Vout ISEN2_4 R807 1 OHM ISEN1_7 ISEN1_1 ISEN1_8 ISEN1_4 ISEN2_7 Vout CN808 NC 1 2 3 4 5 6 7 8 9 10 11 12 Vout Vout ISEN1_8 ISEN1_8 Vout ISEN1_1 ISEN1_5 ISEN1_6 R810 NC 1 OHM CN803 NC 1 2 3 4 5 6 7 8 9 10 11 12 ISEN2_3 ISEN1_5 ISEN1_6 ISEN1_2 ISEN2_6 R808 1 OHM ISEN2_6 ISEN1_5 ISEN2_5 ISEN2_5 CN807 NC 1 2 3 4 5 6 7 8 9 10 11...

Page 32: ...Copyright 2010 LG Electronics Inc All right reserved 33 LGE Internal Use Only Only for training and service purposes Feb 2010 P NO Printed in China ...

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