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Dell E190Sf Service Manual
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Dell E190Sf Service Manual

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Service Manual

Service Manual
LCD Monitor E190Sf
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Summary of Contents for Dell E190Sf

  • Page 1: Service Manual

    Service Manual Service Manual LCD Monitor E190Sf - 0 -...
  • Page 2 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: Table Of Contents

    Service Manual Table of Contents CHAPTER 1- PRECAUTIONS & SAFETY NOTICES ........................SAFETY PRECAUTIONS ..............................PRODUCT SAFETY NOTICE .............................. SERVICE NOTES.................................. CHAPTER 2- SERVICE TOOLS & EQUIPMENT REQUIRED ..................... CHAPTER 3- CIRCUIT THEORY ................................................................. LOCK IAGRAM ............................... LECTRONIC IRCUIT HEORY FACTORY PRESET TIMING TABLE ..........................

  • Page 4: Chapter 1- Precautions & Safety Notices

    Service Manual Chapter 1- PRECAUTIONS & SAFETY NOTICES SAFETY PRECAUTIONS This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However, improper used or installation may cause damage to the monitor as well as to the user. WARNINGS: This monitor should be operated only at the correct power sources indicated on the rating label on the rear cover of the monitor.

  • Page 5: Chapter 2- Service Tools & Equipment Required

    Service Manual 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: Chapter 3- Circuit Theory

    Service Manual Chapter 3- CIRCUIT THEORY Block Diagram This Block is comprised of interface board and switching power supplier board which is included by inverter for CCFL Brightness Control ON/OFF Control +5V DC output +12V DC output Snubber Snubber &Schottky &Schottky Inverter PWM IC...
  • Page 7 Service Manual push-pull configuration.. SSTCMP(pin14) applys the soft-start function and the loop compensation funtion.C5 at SSTCMP compensates the feedback loop and provides good transient response to load changes. When the IC is enabled,it starts from the strinking mode and the TIMER(pin8) is activated.During lamp ignition,if the voltage at pin SSTCMP exceeds an approximate 2.0V threshold,the drive frequency will swith from stinking frequency to the operation frequency, The striking frequency is determined by (R4&...
  • Page 8 Service Manual 2.2 Power PWM circuit operations 2.2.1) Block diagram:(fig.4) EMI Filter Rectifier and Isolation power Rectifier and filter Inverter circuit filter transformer PWM controller Switching element Rectifier and filter To IF connector Feedback Isolation Fig.4 2.2.2) AC Input and EMI Filter:(fig.5) Fig.5 CN850 is a connector for connecting AC Power.
  • Page 9 Service Manual 2.2.3)High Voltage to Low Voltage Control Circuit:(fig.6) D850 BL4-06 T850 R853 SPW-119 C854 0.2R 100u/450V C875 R880 D853 4700p/250V TVS-P6KE170A 82K 2W Signal_GND D851 L854 FR10-10-LF bead R856 D852 10 1% SF10-04 C855 10u/50V C861 3300p/250V C872 T851 Q850 SPW-XXX CN852...
  • Page 10 Service Manual D850 is a rectifier in which there are 4 build-in diodes, inverting AC to DC. C854 is used to smooth the wave from rectifier. R852 is a fuse resistor to protect the following circuit when inrush current is too large. U850 is a current-mode PWM controller with excellent power-saving opration,It features a high-voltage current source to directly supply the startup current from bulk capacitor and further to provide lossless startup circuit.
  • Page 11 Service Manual D854 is used to rectify the inducted current. R862 and C861 are used to store energy when current is reversed. The parts including C862, C865 and L852 are used to smooth the current waves that are from D855, then 13V voltage is supplied. D856 and D857 are SCHTKY diodes used to rectify the inducted current.C866 and R866 are used to store energy when current is reversed,The components including C864,C874,C875,L851 and C876 are used to smooth the current waves,then DC+5V voltage is supplied.

  • Page 12: Factory Preset Timing Table

    Service Manual - +5V is from switching mode power supply for panel and Regulater U601 - +3.3V generates from Regulater U601 supply for U401, U301, U402 used. - +1.8V generates from Regulater U602 through C603, C604 filtering which is output +1.8V for U401 used.

  • Page 13: D-Sub Connector Pin Assignment

    Service Manual Power supply for Symbol Symbol Symbol Red_GND Green Green_GND DDC_SDA Blue Blue_GND Hsync PC+5V Vsync Signals Valid data Cable Detect DDC_SCL (Digital RGB, HS, VS, DE, CLOCK) Power supply for back light T1(ms) T2 (ms) T3 (ms) T4 (ms) T5 (ms) T6 (ms) T7(ms)

  • Page 14: Inner Connector Pin Assignment

    Service Manual Inner Connector Pin Assignment 7.1 CN501 (Connect M/B to Panel, C11330MGHR0 or compatible connector) Symbol Description Panel_Vcc Panel power supply (typ.5.0V) Panel_Vcc Panel power supply (typ. 5.0V) Panel_Vcc Panel power supply (typ. 5.0V) GND_LVDS LVDS Ground RXE3+ LVDS signal of even channel 3(-) RXE3- LVDS signal of even channel 3(+) RXEC+...

  • Page 15: Key Parts Pin Assignments

    Service Manual Key Parts Pin Assignments 8.1 U401 (gm2621-LF) I/O Legend: P=Power, G=Ground, O=Output, I=Input, A=Analog Symbol Description AVSS_BIAS Analog ground for LVDS PLL and Bandgap VDD_OUT_33 Digital 3.3V supply for LVDS output RESERVED Reserved; Do not connect RESERVED Reserved; Do not connect RESERVED Reserved;...
  • Page 16 Service Manual RESERVED Reserved; Do not connect RESERVED Reserved; Do not connect RESERVED Reserved; Do not connect VDD_OUT_33 Digital 3.3V supply for LVDS output VSS_OUT Digital ground for LVDS output PBIAS Panel backlight enable PWM0/GPO_4 I/O PWM0 output or optional general-purpose output GPO_4. Also used for bootstrap control GPIO_0 I/O General-purpose output GPO_0.
  • Page 17 Service Manual RX0- Do not connect. AVDD_DVI_33 Analog VDD (3.3V) for DVI input. Reserved for gm2621 and gm2621; Do not connect. RXC+ Do not connect. RXC- Do not connect. AVSS_DVI Analog GND for DVI input. Reserved for gm2621 and gm2621; Do not connect.
  • Page 18 Service Manual 125 GPIO_13 I/O General-purpose input/output 13 126 GPIO_14 I/O General-purpose input/output 14 127 PPWR Panel power enable 128 AVDD_BIAS_33 Analog 3.3V supply for LVDS PLL and Bandgap 8.2 U402 (Serial Flash) Symbol Description The device is enabled by a high to low transition on CE#. CE# must remain low for the duration of any command sequence.

  • Page 19: Chapter 4- Disassembly & Assembly

    Service Manual Chapter 4- Disassembly & Assembly 1. Exploded Diagram...

  • Page 20: E190S F Disassembly Block

    Service Manual 2. E198FPf Disassembly Block DELL E190Sf DISASSEMBLY BLOCK front-bezel LOGO 1PC bezel assy 1PC key button 1PC back-cover 1pc stand assy 1pc keypad PCB 1PC kensing-ton 1pc Rubber SCREW,I,CROSS,T.T-2*2.5, Zn,ROHS, 2PCS 10x20x3.8mm back-cover assy 1pc 2pcs screw,P,cross, vesa-release-button...

  • Page 21: Assembly Block

    Service Manual 3. Assembly Block DELL E190Sf ASSEMBLY BLOCK 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*12.5,Ni 2pcs screw,I,M3*6,Zn-Cc 2PCS top-mylar 1pc chassis assy 1pc panel 1pc chassis 1pc screw,I,M3*4,Zn-Cc 4pcs (HSD PANEL)

  • Page 22: Chapter 5- Test And Adjustment

    Service Manual Chapter 5- TEST AND ADJUSTMENT 1. Function key Definitions Power Switch Power: On/Off, includes power indicator and Power ICON Power LED Green- Active On Amber- DPMS Front Panel Controls Adjust Up:(+)symbol molded into button, move up the highlight bar Adjust Down: (-) symbol molded into button, calls out brightness/Contrast, move down the highlight bar.

  • Page 23: Factory Mode Introduction

    “Power” button to turn on the monitor. After power on, press “Menu” button to call out Main Menu (Fig.1). Pull down to Factory Reset and choose Factory to enter Factory mode (Fig.2). Panel: JT094: Current using panel part number(DELL supply) Exit: Exit from Factory mode and back to Reset to Factory Settings.

  • Page 24: Edid (Rewrite Edid Data To Eeprom)

    Service Manual 6. EDID (Rewrite EDID data to EEPROM by Fox_VEDID_Programmer) The Write-Protect Pin of EEPROM is generally pulled up to enable EDID to be read only; EDID cannot be written at that status. The following steps enable EDID to be written: 6.1 Connect the monitor and PC via a VGA cable.

  • Page 25: After Repair, To Ensure The Quality You Should Do The Following Test And Adjustment

    Service Manual 8. After repair, to ensure the quality you should do the following test and adjustment.

  • Page 26: Chapter 6- Trouble Shooting

    Service Manual Item Content Equipment Test OSD 1.Signal is set as 1280×1024@60Hz under General-1 Chroma 2. LCM button are from left to right, checking whether each single function key and function Signal compound function key can be worked. Generator 1. Set input mode to 1280×1024@60Hz Chroma Contrast Signal...
  • Page 27 Service Manual new M/B because there was program inside. If not, please re-write EDID or upload firmware into serial flash(U402) via VGA Cable. How to do please refer to the Page 19. If you adjust clock and phase, please do it at condition of Windows shut down pattern. Please confirm the R/G/B color under 32gray scale pattern.

  • Page 28: Power Led Amber

    Service Manual 3. Power LED Amber Is Power LED Amber? Do the Hsync. & Vsync. Signals exist Insert VGA Cable correctly in CN301 #13& #14 separately? Do the Hsync. & Vsync. Signals exist Check R310 & R311 in R310 & R311? Do the Hsync.

  • Page 29: Backlight Can

    Service Manual 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 Is the CN851 on-off control signal come from IF ok? inserted CN101 OK? Is the on-off control signal #109 of U105 high-low convertible when DC on/off Change U105 Is the...

  • Page 30: N O Picture & Backlight

    Service Manual 5. No picture & Backlight on No picture & Backlight on Touch OSD Menu Button, Does OSD display? Is there R.G.B signal in Change D301, U401 #99, #96 #93? D302 & D303 Is there clock signal in Change X401 U401 #109? Check DC 5.0V on CN501#1, #2, #3...

  • Page 31: At 32-Gray Scale Pattern, Color Lost In Some Scale

    Service Manual 6. At 32-gray scale pattern, color lost in some scale Color lost in some scale at 32-gray scale pattern Re-insert the FFC Cable Change FFC Cable Change M/B 7. Diagnostic Test Pattern 1. Press “menu”and “+”simultaneously and hold for 2 sec to enter to the diagnostic. Check for line defects from the gray color test screen.
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  • Page 34: Chapter 7- Recommended Part List

    Service Manual Chapter 7- RECOMMENDED PART LIST Critical Parts List E190S Critical Components List Supplier Content Description Supplier Usage Location U401, 412040098880R IC GM2621-LF-BC,QFP-128(GENESI S)RoHS Scaler To Power FOXCONN, Board CN601, 430631050060R WFR. 5P 2.0MM 180° W/L ROHS JOWLE, Connector 412000494310R IC PM25LV020-100SCE SOIC8(PMC)RoHS PMC, 412000721560R IC W25X20AVNIG SOIC8(WINBOND) RoHS...

  • Page 35: Attachment 1- Bill Of Material

    1 PC 100 506060017600R CUSHION TOP,LE19S1 1 PC 110 506060017601R CUSHION BUTTOM ,LE19S1 1 PC 120 506340004700R LABEL BLANK 101X50mm DELL EMEA CARTON 1 PC 130 506380002622R TAPE, WRAPPING TYPE PRINTED(DELL), BLACK 0.00134 ROL A 140 713000100500R ASSY PACK,20STD,LE19S1 140 713000100501R...
  • Page 36 714030027001R ASS'Y FRONT BEZEL ,LE19S1 10 501010226500R FRONT BEZEL LE19S1 1 PC 20 750020201100R SUB-BUTTON,LE19S1 1 PC 30 506102000600R LOGO PLATE DELL LE1X13 1 PC 714080HA2000R ASSY,PANEL,W/O SPK,LE19S1-A10(E190Sf) 10 631102092520RD LCP 19" LM190E08-TLJ3(A)(LGD)ROHS 1 PC 10 631102092530RD LCP 19" LM190E08-TLJ4(A)(LGD)ROHS...
  • Page 37 50 509216304201R SCREW,F,CROSS,M3*4,Zn-Cc 2 PC 60 502040000300R SHIELD SLIDE LE1X13 1 PC 70 502040400600R SHIELD EMI LP2207 6 PC PCBA PI BOM E190Sf PCBA PI ITEM P/N Description Supplier Usage Location PCBA,P/I BOARD,W/O SPK,LE19S1-710 792811400700R ROHS PCBA,P/I BOARD,W/O SPK,MI,LE19S1-710 10 792811420700R...
  • Page 38 Service Manual RoHS 50 735110012400R ASSY,H/S,Q850,LE19S1,ROHS 70 511110000501R SILICONE RTV RUBBER,UB-511(EURO) EURO, 0.45 80 511110000103R HOT-MELT ADHESIVES,UB-618 U-BOND, 80 511110000101R HOT-MELT ADHESIVES (#526) EXCELSTAR, ITEM P/N Description Supplier Usage Location 735110012400R ASSY,H/S,Q850,LE19S1,ROHS XSTR AP2764AI-A N-CH 650V/9A 10 410050114290R APEC, 1 Q850, TO-220CFM 10 410050057280R XSTR STP8NK80ZFP N-CH TO220FP (ST) XSTR FMA09N65GX N-CH TO-220F(FUJI)
  • Page 39 Service Manual CHOKE L-FILTER 12mH LIN-007 DARFON,FOXCONN,LISHIN, 160 426000050070R 1 L850, ET-20,RoHS MEIKAI,TAICHANG, 170 411050012010R DIO BRDG GBU405 600V/4A(TSC)RoHS TSC, 1 D850, DIO BRDG GBU4-06-BF52 170 411050012020R FRONTIER, 600V/4A(FEC)RoHS SCHTKYSR520F75-LF 200V/5A 180 411090056022R FRONTIER, 1 D854, DO-201AD(FEC) SCHTKYSR5200PT-A3 200V/5A 180 411090056452R CHENMKO, DO-201AD(CHENM SCHTKY MBR5200-F46 200V/5A...
  • Page 40 Service Manual 40 430613050101R FUSE SLOW 5A/125V U/C,AT,ROHS WALTER, QUEENMAO,TZAI 50 415211500140R RES MF 1/8W 150Ω F,AT,RoHS 1 R20, YUAN,UNIOHM,欣統, QUEENMAO,TZAI 60 415237503140R RES MF 1/2W 750KΩ F AT MINI,ROHS 2 R850,R851, YUAN,UNIOHM,欣統, QUEENMAO,TZAI 70 415213301140R RES MF 1/8W 3.3KΩ F,AT,RoHS 1 R860, YUAN,UNIOHM,欣統, QUEENMAO,TZAI...
  • Page 41 Service Manual DARFON,TDK,WALSIN,YAGE 40 419314730060R C SMD (0603) X7R 0.047uF 50V,K RoHS 1 C5, DARFON,TDK,WALSIN,YAGE 50 419312720060R C SMD(0603) X7R 2700PF/50V K RoHS 2 C7,C8, DARFON,TDK,WALSIN,YAGE 60 419313320070R C SMD(0805) X7R 3300PF/50V K RoHS 2 C9,C10, 70 411020047210R DIO BAV70 85V SOT23 (PHILIPS) RoHS PHILIPS, 1 D1, 70 411020047020R DIO BAV70-LF, 70V SOT-23(FEC) ROHS...
  • Page 42 Service Manual C505,C503,C502,C435, C431,C430,C429,C428, C426,C424,C423,C418, C411,C410,C409,C408, 10 419311044010R C SMD(0402) X7R 0.1uF/16V,K,RoHS TDK,WALSIN,YAGEO, C407,C405,C404,C310, C312,C601,C605,C604, C606,C434,C440,C441, C443,C444, MURATA,TDK,WALSIN,YAGE 20 419302700510R C SMD(0402) NPO 27PF/50V J RoHS 2 C307,C308, MURATA,TDK,WALSIN,YAGE 30 419301010510R C SMD(0402) NPO 100PF/50V J,RoHS 2 C311,C309, MURATA,TDK,WALSIN,YAGE 40 419301000510R C SMD(0402) NPO 10PF/50V J,RoHS 2 C413,C414, 50 411020026210R DIO BAV99 350mW 70V SOT-23(PHI RoHS PHILIPS, 3 D301,D302,D303,...
  • Page 43 Service Manual R502,R429,R420,R419, TA-I,UNIOHM,WALSIN,YAGE 180 414918010350R RES SMD (0402) 10KΩ J,RT,RoHS R418,R415,R414,R424, R423,R422,R421, TA-I,UNIOHM,WALSIN,YAGE 190 414918100210R RES SMD (0402) 10KΩ F,RT,RoHS 1 R416, TA-I,UNIOHM,WALSIN,YAGE 200 414918200210R RES SMD (0402) 20KΩ F,RT,RoHS 2 R503,R417, 210 412040098880R IC GM2621-LF-BC,QFP-128(ST)ROHS 1 U401, 220 412000332990H IC EC50117KAG 3.3V TO-252(E-CMOS) E-CMOS, 1 U601, 220 412000332020R IC LD1117AL-3.3-A TO-252(UTC)RoHS...
  • Page 44 Service Manual E190Sf PCBA KP BOM.xls ITEM P/N Description Supplier Usage Location 792811500000R PCBA,KEYPAD BOARD,LE19S1 ROHS 10 792811540000R PCBA,KEYPAD BOARD,SMT,LE19S1 ROHS FOXCONN,HUA-JIE,唯 20 430602680070R SW METAL DOME 180gf 4P D07,RoHS 佳_BEST, INSULATOR,MYLAR,KEY-PAD 30 505040206500R JEOU UEI, PCB,72.5X10.6x0. ITEM P/N Description...

  • Page 45: Attachment 2- Schematic

    Service Manual Attachment 2- Schematic E190S ST gm2621 RevA...
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  • Page 56: Attachment 3- Pcb Layout

    Service Manual Attachment 3- PCB Layout IF board Top Layer...
  • Page 57 Service Manual IF board Bottom Layer...
  • Page 58 Service Manual power layout...
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