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Service Manual

28

Change U105

4.

Power (include IF +5Vand +3.3V) supply normal

( key function OK, but backlight can’t be turned on)

Backlight cannot be turned on,is the
on-off control signal come from IF ok?

Is the CN851
inserted CN101 OK?

NO

Yes

Is the on-off control signal #109 of U105
high-low convertible when DC on/off

NO

Yes

Is the

voltage

13Vat T1

PIN3/4

Check
T1

NO

Yes

Yes

Check U1
pin2 Voltage
is 5V

Yes

Check U1 pin6
Voltage is High

Check

CN851

NO

YES

Check U1 pin1 and pin16 Output

Change Q1

Yes

Check

U1

NO

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Summary of Contents for E190Sf

Page 1: ...Service Manual 0 Service Manual LCD Monitor E190Sf ...

Page 2: ...lease Copyright Copyright 2009 InnoLux Display Corp Ltd All Rights Reserved This manual may not in whole or in part be copied Photocopied reproduced translated or converted to any electronic or machine readable form without prior written permission of Foxconn Tech Corp Ltd Dell E190Sf Service Manual ...

Page 3: ...D ADJUSTMENT 21 1 FUNCTION KEY DEFINITIONS 1 3 H21 2 OSD CONTROL 錯誤尚未定義書籤 3 FACTORY MODE INTRODUCTION 1 4 H22 4 BURN IN PATTERN 1 5 H22 5 AUTO COLOR BALANCE AUTOMATICALLY CALIBRATE CHIP ADC PARAMETER BY USING CHIP INTERNAL DAC 1 6 H22 6 EDID REWRITE EDID DATA TO EEPROM 1 7 H23 7 UPLOAD FIRMWARE TO MCU VIA VGACABLE 1 8 H23 8 AFTER REPAIR TO ENSURE THE QUALITY YOU SHOULD DO THE FOLLOWING TEST AND A...

Page 4: ...t gets wet unplug the power cable immediately and consult your closed dealer z Always unplug the monitor before cleaning it Clean the cabinet with a clean dry cloth Apply non ammonia based cleaner onto the cloth not directly onto the class screen z Do not place heavy objects on the monitor or power cord 2 PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safet...

Page 5: ...Chapter 2 SERVICE TOOLS EQUIPMENT REQUIRED 1 SIGNAL GENERATOR 2 MULTIMETER 3 SCREW DRIVER 4 OSCILLOSCOPE 5 Soldering IRON 6 SOLDER Lead free RoHS compliance 7 Color Analyzer 8 Fox_VISP_Programmer 9 Fox_VEDID_Programmer ...

Page 6: ... is less than 3 4V the IC will enter the lockout mode The IC will resume operation when the voltage at pin VDDA exceeds an approximate 3 8V threshold Pin3 SEL used to select appropriate drive topologies connecting pin SEL to GED shows the IC in the Snubber Schottky 5V DC output Brightness Control Photocoupler To Panel CCFL Feedback Control AC Input 90V 264V Power PWM Control IC Power ON OFF Contro...

Page 7: ... the same to circuit of Power The voltage signal on negative pole of D1 sensed through R7 R8 comes to Pin11 of U1 VSEN Lamp Current Detection Control The CCFL current is detected through R12 R21 and reaches a regulated value The CCFL current detected at resistor R12 R21 is converted to a voltage level and input to the ISEN1 2 Once the CCFLs are ignited and current is sensed through resistor R12 R2...

Page 8: ...om 90V to 264V R850 and R851 are joined between two inputting main circuit to prevent man from shock L850 is used to filter low frequency noise C850 and C851 are used to discharge the noise that L850 produced High frequency waves are damped by C852 EMI Filter Rectifier and filter Isolation power transformer Rectifier and filter Inverter circuit PWM controller Switching element Feedback Isolation R...

Page 9: ...8 Gate Isense GND FB GND VDD NC Vin R880 82K 2W D851 FR10 10 LF Signal_GND C860 OPEN Signal_GND I850 LTV817M 3 1 4 2 R855 10K D850 BL4 06 3 1 2 4 D852 SF10 04 Signal_GND C872 100P 1KV R856 10 1 R849 220R R848 20R R842 20K C847 Open C849 1nF 50V NPO Signal_GND C848 100nF 50VX C846 220pF 50V NPO D849 NC Signal_GND R846 100K 1 CN852 CON8PIN 1 8 3 4 5 6 7 2 Gate HV GND FB GND VDD NC Isense Signal_GND ...

Page 10: ...roller feedbacks both current signal and voltage signal to close the control loop and achieve ragulation U850 detects the Q850 current from Isense pin which max voltage is set as 0 85V then the Q850 current can be calculated as I peak 0 85V R869 When the sense voltage across the sense resistor R869 reaches the threshold voltage over 0 85V the output GATE drive will be turned off R849 and C846 is u...

Page 11: ...through R310 and then goes into IC U401 gm2621 LF 89 CN301 5 is defined as cable detect pin this detector realize via R319 and U401 114 and ZD301 is ESD protector U301 3 3V is supplied by PC via CN301 9 or supplied by Monitor self via D307 with D306 and ZD304 for ESD protection U301 is an EEPROM IC which is memory and EDID data saved in it 2 3 2 Buttons Control Button Power on front bezel connects...

Page 12: ...rdware Power ON When power cord plug into AC socket Power provides 12V DC_5V from through U850 DC_3 3V be generated from DC_3 3V Regulater U601 DC_5V is voltage for panel DC_3 3v is main voltage for U401 When DC_3 3V input to U401 U401 reset circuit active set U401 all registers to default That means finish hardware power on Software Power ON OFF When press power key U401 125 recieves low pulse an...

Page 13: ...6 ms T7 ms SPEC LGD 0 5 10 0 001 50 200 200 0 001 50 500 SPEC HSD 0 5 10 0 50 200 200 0 0 50 500 5 D SUB Connector Pin Assignment 6 AC Outlet Pin Assignment Pin Symbol Pin Symbol Pin Symbol 1 Red 6 Red_GND 11 GND 2 Green 7 Green_GND 12 DDC_SDA 3 Blue 8 Blue_GND 13 Hsync 4 GND 9 PC 5V 14 Vsync 5 Cable Detect 10 GND 15 DDC_SCL Pin Symbol Description 1 Line 2 GND 3 Neutral CN850 1 3 2 ...

Page 14: ...RXE0 LVDS signal of odd channel 0 20 RXO3 LVDS signal of odd channel 3 21 RXO3 LVDS signal of odd channel 3 22 RXOC LVDS signal of even channel clock 23 RXOC LVDS signal of even channel clock 24 GND_LVDS LVDS Ground 25 RXO2 LVDS signal of even channel 2 26 RXO2 LVDS signal of even channel 2 27 RXO1 LVDS signal of even channel 1 28 RXO1 LVDS signal of even channel 1 29 RXO0 LVDS signal of odd chann...

Page 15: ...ot connect 22 RESERVED O Reserved Do not connect 23 RESERVED O Reserved Do not connect 24 RESERVED O Reserved Do not connect 25 Vdd_out_33 P Digital 3 3V supply for LVDS output 26 VSS_OUT G Digital ground for LVDS output 27 RESERVED O Reserved Do not connect 28 RESERVED O Reserved Do not connect 29 RESERVED O Reserved Do not connect 30 RESERVED O Reserved Do not connect 31 O_CH3P_LV O LVDS odd cha...

Page 16: ...und 64 DDC_SCL_VGA I DDC2Bi clock for Analog Port 65 DDC_SDA_VGA I O DDC2Bi clock for Analog Port internal pull up of 10K ohms 66 DDC_SCL_DVI HOST_SCA I DDC2Bi clock for DVI Port or host I2C clock signal for debugging 67 DDC_SDL_DVI HOST_SDA I O DDC2Bi clock for DVI Port or host I2C data signal for debugging internal pull up of 10k ohms 68 AVSS_DVI G Analog GND for DVI input Reserved for gm2621 an...

Page 17: ... power 3 3V for ADC Must be bypassed with capacitor to AVSS_ADC pin 102 AVSS_ADC G Analog ground for ADC 103 AVSS_ADC G Analog ground for ADC 104 AVDD_ADC_18 P Analog power 1 8V for ADC Must be bypassed with capacitor to AVSS_ADC pin 105 VBUFC_RPLL O Reserved Do not connect 106 VDD_RPLL_18 P Digital 1 8V Power for PLL 107 VSS_RPLL G Ground for PLL 108 XTAL O Connect to 14 3MHz crystal Should be by...

Page 18: ...y stop serial communication with SPI flash memory without resetting the device 8 VDD P To provide power supply 8 3 U850 LD7575 Power Controller Pin Symbol I O Description 1 RT This pin is to program the switching frequency 2 COMP I Voltage feedback pin By connecting a photo coupler to close the control loop and achieve the regulation 3 CS I Current sence pin 4 GND 5 OUT O PWM output Gate drive out...

Page 19: ...Service Manual 18 Chapter 4 Disassembly Assembly 1 Exploded Diagram ...

Page 20: ...screw I M3 4 Zn Cc 4pcs HSD PANEL screw I M3 5 Zn Cc 4pcs LGD PANEL DELL E190Sf DISASSEMBLY BLOCK Rubber 10x20x3 8mm 2pcs bottom mylar 1pc LVDS cable 1pc TAPE ACE 85X45mm keypad PCB 1PC SCREW I CROSS T T 2 2 5 Zn ROHS 2PCS PCBA P I board LE1966 7B0 1pc screw p cross W WAS M3 8 Zn Cc 2PCS screw B cross W W T M4 6 Zn Cc 1PC PCBA I F board LE1966 8B0 1pc screw p cross W WAS M3 8 Zn Cc 2PCS BOLT 4 40 ...

Page 21: ...e 1pc chassis assy 1pc vesa release button 1pc release metal button 1pc release button assy 1pc stand assy 1pc bezel assy 1PC DELL E190Sf ASSEMBLY BLOCK back cover assy1pc panel 1pc screw I M3 4 Zn Cc 4pcs HSD PANEL screw I M3 5 Zn Cc 4pcs LGD PANEL bottom mylar 1pc SCREW BPT3 0x4 C3UC ROHS 2PCS LVDS cable 1pc top mylar 1pc chassis 1pc LOGO 1PC front bezel 1PC key button 1PC screw P cross M4 10 bl...

Page 22: ... and select the item Hot Key Function Automatic adjust Directly press Brightness Contrast Icon Directly press 2 OSD Control First Second Third Fourth Exit Contrast Brightness Contrast Press directly Brightness Exit Horizontal Positioning Vertical Exit Auto Adjust Pixel Clock Image setting Phase Normal Preset Blue Preset Red Preset Color Setting User Preset Exit R G B Exit Horizontal Pos Vertical P...

Page 23: ...ip s back end white balance program Time Turn on time of the panel 4 Burn in pattern If it is a new monitor without VGA cable plugged in burn in pattern will self generate automatically Burn in pattern will not be stopped until plugging in the VGA cable Then press Menu button to call out OSD Main Menu pulling down to Factory Reset item and execute All Resetting to disable Bun in ON 5 Auto Color Ba...

Page 24: ... Fox_VISP_Programmer enables users to upgrade the firmware of the monitor directly through the VGA cable of a PC Please follow the steps for reprogramming the firmware Click Select Bin icon to choose a binary file from the PC The path of the selected binary file will be shown in the Message text window Meanwhile the checksum of the binary file will be calculated and displayed Click Connect to chec...

Page 25: ...Service Manual 24 8 After repair to ensure the quality you should do the following test and adjustment ...

Page 26: ...ming modes must be full screen and the picture must be normal 3 LED is amber at power saving mode Chroma Signal Generator VGA cable detector When VGA cable is not plugged out self test OSD will be floated Visual check Minimum luminance measurement 1 LCD minimum luminance spec is 200cd m2 0 15 months from mfg date 2 0 15 months 80 of minimum luminance Chroma Signal Generator and Color Analyzer OSD ...

Page 27: ...n z This LCM support 10 timing modes if the input timing mode is out of specification Cannot Display this Video Mode will be displayed on the screen z If brightness uneven repairs Inverter circuit or change a new panel z If you find the vertical line or horizontal line lost on the screen please change panel z If the self test pattern is moving on the screen please check whether VGA Cable is plugge...

Page 28: ...xist in CN301 13 14 separately Do the Hsync Vsync Signals exist in R310 R311 Do the Hsync Vsync Signals exist in U401 89 90 Is the frequency 14 318MHz at 109 of U401 Change U401 END Insert VGA Cable correctly Check R310 R311 Change R310 R311 Change X401 NO NO NO NO YES YES YES YES YES ...

Page 29: ...is the on off control signal come from IF ok Is the CN851 inserted CN101 OK NO Yes Is the on off control signal 109 of U105 high low convertible when DC on off NO Yes Is the voltage 13Vat T1 PIN3 4 Check T1 NO Yes Yes Check U1 pin2 Voltage is 5V Yes Check U1 pin6 Voltage is High Check CN851 NO YES Check U1 pin1 and pin16 Output Change Q1 Yes Check U1 NO ...

Page 30: ...OSD Menu Button Does OSD display Is there R G B signal in U401 99 96 93 Is there clock signal in U401 109 Check DC 5 0V on CN501 1 2 3 Are there data output on U401 7 16 31 40 Change U401 END Change D301 D302 D303 Check Q501 circuit YES YES YES YES YES NO NO NO Change X401 NO ...

Page 31: ... color test screen 2 Press to advance to the next test pattern Red color screen Check for partial block dot s Red color dead pixel Continue this for the Green Blue color 3 When in White color test screen check for white color uniformity and if there white color appears greenish reddish etc Color lost in some scale at 32 gray scale pattern Re insert the FFC Cable Change FFC Cable Change M B OK END ...

Page 32: ...Service Manual 31 ...

Page 33: ...Service Manual 32 ...

Page 34: ... A1SEMI A1SEMI 412000480280R IC M24C02 RMN6TP SO8 ST RoHS ST 412000435480R IC AT24C02BN 10SU 1 8 SOIC8 2K ATMEL Ro ATMEL 412000480990R IC CAT24C02WI TE13 SOIC 8 CATALYST RoHS CATALYST EEPROM U301 412000330130R IC AP1117E18LA 1 8V ANACHIP SOT223 3L ANACHIP 412000330830R IC AS1117L 1 8 TR LF SOT223 A1 SEMI RoHS A1SEMI 412000330020R IC LD1117AL 1 8V A SOT223 UTC RoHS UTC DC to DC convert U602 4924213...

Page 35: ...K COVER LE19S1 1 PC A 2 50 714000001410R ASSY RELEASE BUTTON B LE1X28 1 PC A 2 60 714020021000R ASS Y STAND LE19S1 1 PC A 2 70 714030027001R ASS Y FRONT BEZEL LE19S1 1 PC A 2 80 714080HA2000R ASSY PANEL W O SPK LE19S1 A10 E190Sf 1 PC A 1 713100016000R ASSY PACKAGE PACK DAO LE19S1 2 10 506140005800R LABEL BARCODE LE1963 1 PC B 2 20 506250001900R LABEL AGENCY LE19S1 1 PC A 2 30 506431011200R FILM SC...

Page 36: ...5040212900R INSULATOR TOP PC LE19S1 1 PC A 3 130 701000003700R ASSY CHASSIS LE1966 1 PC D 3 140 506381000800R TAPE ACE PC 85x45mm LE1913 1 PC A 3 150 505040206510R INSULATOR MYLAR BOTTOM 180 6x100x0 25mm 1 PC A 3 160 509112304100R SCREW BTP3x4C3UC ROHS 2 PC A 2 713000100500R ASSY PACK 20STD LE19S1 3 10 506432001100R SLIP SHEET L1280XW1000X100MM PC B 3 20 506432001500R SLIP SHEET L1130xW886xH100mm ...

Page 37: ...PACK AIR CARGO 40STD LE19S1 3 10 506150015000R PALLET L1233 W980 H120mm LE19S1 PC A 3 20 506150003901R PALLET L986 W822 H120mm LE19S1 PC A 3 30 506037013200R CARDBOARD COVER L1233 W980 H100 T3mm LE PC A 3 40 506037003901R CARDBOARD COVER L986 W822 H100 T3mm LE19 PC A 3 50 506039000101R CORNER PAPER 1000x50x50xT3mmLE1711 PC A 3 60 506039001400R CORNER PAPER 200x50x50mm ROHS PC A 3 70 506431000300R ...

Page 38: ... 10 430637020030R WFR 2P P 3 5mm 90 W LOCK RoHS CVILUX FCN FOXCONN 2 CN1 CN2 20 440149000350R SKT AC 10A 250V U C V H 1 0MM ROHS TECX 1 CN850 30 418110051520R CAP CD NPO 10pF 3KV J S7 5 RoHS JNC SUCCESS SEC 1 C22 30 418110058510R CAP CD SL 10pF 3KV J F7 5 RoHS CC45SL3FD JNC SUCCESS SEC 0 40 418103051920R CAP CD NPO 3pF 3KV D S7 5 RoHS JNC SUCCESS SEC 2 C20 C21 40 418103058920R CAP CD SL 3pF 3KV D ...

Page 39: ...ocation 792792140000R PCBA CONTROL B PWR LD7575 SMD LP2261 RO 10 419312210060R C SMD 0603 X7R 220PF 50V K RoHS DARFON TDK WALSIN YAGE O 1 C846 20 419311040060R C SMD 0603 X7R 0 1uF 50V K RoHS DARFON TDK WALSIN YAGE O 1 C848 30 419311020060R C SMD 0603 X7R 1000PF 50V K RoHS DARFON TDK WALSIN YAGE O 1 C849 50 414904020350R RES SMD 1206 20KΩ J RT RoHS TA I UNIOHM WALSIN YAGE O 2 R843 R842 60 41491601...

Page 40: ...40Ω F AT RoHS QUEENMAO TZAI YUAN UNIOHM 欣統 1 R21 200 506140005700R LABEL BARCODE BLANK 33x7mm ROHS FOR PCB HENGMINGDA JIAYINMEI KA IDA 1 ITEM P N Description Supplier Usage Location 792811460700R PCBA P I BOARD W O SPK AI R LE19S1 710 10 420221000530R CAP HG 10uF 50V M 105 VT 5x11 RoHS LELON SAMXON SU SCON 1 C855 20 420426810261R CAP SD 680UF 25V M 105 ST 10X20 ROHS LELON SAMXON SU SCON 1 C25 30 4...

Page 41: ... I UNIOHM WALSIN YAGE O 2 R9 R10 160 412000783630R IC INL816GN SOP16 O2 MICRO O2 1 U1 170 492422200000H PCB CRL I 2 OSP FR4 12 INL816 LE19S1 H EXPRESS SHENG HUA 1 PCBA IF BOM E190S PCBA IF BOM ITEM P N Description Supplier Usage Location 792811300400R PCBA I F BOARD W O SPK LE19S1 410 ROHS 10 792811320700R PCBA I F BOARD W O SPK MI LE19S1 710 RO 1 20 792811340700R PCBA I F BOARD W O SPK SMT LE19S1...

Page 42: ... SBK160808 CHILISIN TAI TECH 2 L410 L407 90 432002360111R BEAD CORE SMD 0805 600Ω 2A PBY201209T CHILISIN MAGLAYERS TAI T ECH 3 L414 L412 L601 100 432002330140R BEAD CORE SMD 0603 300Ω 200mA RoHS CHILISIN MAGLAYERS TAI T ECH 5 L413 L411 L403 L404 L 406 110 410500045440R XSTR LMBT3904LT1G NPN 200mA 40V SOT23 LRC 1 Q502 110 410500045210R XSTR PMBT3904 NPN 200MA 40V SOT23 PHILIP PHILIPS 0 110 41050004...

Page 43: ... 2V MMSZ5234B SOD 123 PANJIT RoH PANJIT 10 ZD306 ZD305 ZD304 Z D303 ZD302 ZD301 ZD 401 ZD402 ZD403 ZD4 06 250 411121462950R ZENER 6 2V BZT52 C6V2 SOD 123 WILLAS ROH WILLAS 0 250 411131562950R ZENER 6 2V BZT52C6V2 7 F SOD 123 DIODES DIODES 0 260 419314755050R C SMD 1206 X7R 4 7uF 10V K RoHS MURATA TAIYO TDK WALSI N YAGEO 5 C442 C427 C412 C415 C506 260 419354755050R C SMD 1206 X5R 4 7uF 10V K RoHS M...

Page 44: ...er Usage Location 792811540000R PCBA KEYPAD BOARD SMT LE19S1 ROHS 10 411070033500R LED SMD 0603 Y G HTL 19 22VYVG C TR8 HON HONGTONG 1 LED1 10 411070044500R LED SMD 1612 Y G KPTB 1612SYKC GKC SZ KI KINGBRIGHT 0 10 411070125550R LED Y G 19 226A Y5G7C A01 2T everlight EVERLIGHT 0 20 492421500000H PCB K P 2 OSP FR4 08 LE19S1 HF EXPRESS SHENG HUA 1 30 430631080160R WAFER 8P 1 0MM SMD V A WITH LOCK ROH...

Page 45: ...Service Manual 44 Attachment 2 Schematic E190S ST gm2621 RevA ...

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Page 56: ...Service Manual 55 Attachment 3 PCB Layout IF board Top Layer ...

Page 57: ...Service Manual 56 IF board Bottom Layer ...

Page 58: ...Service Manual 57 power layout ...

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