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Service Manual

1. ON OFF Control 5V DC output DC output Snubber Snubber amp Schottky amp Schottky A A Feedback Transformer and OVP ww A INL833 Rectifier amp ectifier Filter ril Photocoupler Circuit A Feedback PWM Control IC Control AC Line Filter LD7552B A AC Input 90V 264V p eog 41 OL Fig 1 122 222 Panel Interface Brightness Control ON OFF Control AP1117E33A LM1117MPX 3 3 AP1117E18A LM1117MPX 1 8 Scaler Mstar TSUMS8EHJ LF 2 XTAL 14 318MHz 24C02 Ex DVI Connector VGA Connector Fig 2 Service Manual 24C02 RESERVA TION DELL Service Manual Electronic Circuit Theory 2 1 Inverter PWM circuit Inverter Control circuit fig 2 1 1 1 R2 26 T T H RI 205 5 1 C20 0 1504 21 204 5 70u50 556 W01 05100 022N 1 R30 1 1 8 C25 E 1 pi3Kv poy 0 04750 3 6 VODA 8 2 v RF 047 50 4 5 2 5 Lr 9 NDR2 2 L 10 06 PORI 12 AP4575GM 3401 05100 022 uf 11 VODA PDR2 4 7 4 12 TIMER GNDA 3 23 1 RT 1 8 10K 14 igen E I 1 3 H H 4 4 4 4 5
2. 7 GND_LVDS LVDS Ground 8 RXE3 LVDS signal of even channel 3 9 RXE3 LVDS signal of even channel 3 10 RXEC LVDS signal of even channel clock 11 RXEC LVDS signal of even channel clock 12 RXE2 LVDS signal of even channel 2 13 RXE2 LVDS signal of even channel 2 14 GND_LVDS LVDS Ground 15 RXE1 LVDS signal of even channel 1 16 RXEI LVDS signal of even channel 1 17 GND_LVDS LVDS Ground 18 RXE0 LVDS signal of odd channel 0 19 RXEO LVDS signal of odd channel 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 RX02 LVDS signal of even channel 2 26 2 LVDS signal of even channel 2 27 RXO1 LVDS signal of even channel 1 28 RXOI LVDS signal of even channel 1 29 RXO0 LVDS signal of odd channel 0 30 RXO0 LVDS signal of odd channel 0 7 2 CN1 CN2 CN3 CN4 Connect to Panel Backlight Pin Symbol Description 1 HV High voltage for lamp 2 LV Low voltage for lamp 7 3 CN104 Connect to keypad WAFER2 4P or compatible connector Pin Symbol Description 1 MENU OSD MENU control 2 PLUS OSD control and Brightness Contrast adjustable hot key 3 MINUS OSD control and
3. retenta tette kn Ha 14 6 AC OUTLET PIN ASSIGNMENT Qu u u u s ese 14 7 INNER CONNECTOR PIN 1 aa as aaa adaa tette te sete renun 14 8 KEY PARTS PIN ASSIGNMENTS 2 2 2222 k awas 16 CHAPTER 4 DISASSEMBLY amp ASSEMBLY 21 1 EXPLODED DIAGRAM una 21 2 E2009W DISASSEMBLY BLOCK 4 4 abel e k f e T e ee elke 22 3 ASSEMBLY BLOCK 23 CHAPTER 5 TEST AND ADJUSTMENT wccsccscceoscsncsssssvnscsdastessssssceseventeccessdecvseesacsveseccsedssbovsassdcesscosesecusessvedenacedsssexcsesdesuscssastessvesesss 24 1 FUNCTION KEY DEFINITIONS sies ad dekken Skee 24 2 OSDCONROb c 24 3 FACTORY MODE INTRODUCTION 26 4 BURN INTPATITERNE 27 5 AUTO COLOR BALANCE AUTOMATICALLY CALIBRATE CHIP ADC PARAMETER BY USING CHIP INTERNAL DAC 27 6 UPLOAD FIRMWARE TO MCU VIA VGA CABLE iscsi aabee acess aica 27 7 AFTER REPAIR TO ENSURE THE QUALITY YOU SHOULD DO THE FOLLOWING TEST AND ADJUSTMENT 27 CHAPTER 6
4. 8 0 9610080911 Asay ano 2e8 Z T 000002011105 8980 Avid P L 905 ETOLITUUSHXSS 5 T WOOOOIIOZIIOS 6840091 suo 2 1 3 woranzrtopte 010717 Assy pumas ov WOOGTIZOEOTOS even eire 1 t YD00ZZ20T010S 30044 8 1 MOQAOZODEDPTE 5 30 ON ned 14 nop reg av 0 ON ne neub ON 20 DELL Service Manual 2 E2009W Disassembly Block LE20M9 DISASSEMBLY BLOCK keypad board 1 1 Screw P Cross T T 2 3 BLK 4 FINAL ASSY 1 logo plate 1 power lens 1 PANEL 1 Button Function 1 LCross M3 4 Zn CcY 4 Front bezelt1 STAND ASSY 1 1 u ower board 1 FRONT BEZEL ASSY 1 P Cross W WAS M3 6 Zn Cc 8 B Cross W W AS M3 9 Zn Cc 1 LCross M3 6 Zn Cc 2 VESA release button 1 5 BACK COVER ASSY 1 fix plateR 1 I F board 1 P cross T T 3 4 Zn 1 FFC CABLE 1 P Cross W W AS M3 6 Zn Cc 2 fix plateL 1 BOLT 4 40 NI 4 Picross T T 3 4 Zn 1 PANEL ASSY 1 P Cross M4 10 BLACK NL 4 spring 2 slide 1 TAPE ACE 85x20mm 1 Chassis 1 EMI clip 1 CHASSIS ASSY 1 Note 1 The arr
5. Service Manual 2 Measure color temperature check if it complies with the following temperature Warm 0 328 0 03 y 0 344 0 03 Desktop x 0 313 0 03 y 0 329 0 03 Cool x 0 283 0 03 y 0 298 0 03 Item Content Equipment Test OSD 1 Signal is set as 1440x900 60Hz under General 1 Chroma function 2 LCM button are from left to right checking whether each Signal Generator single function key and compound function key can be worked Contrast Check Set input mode to 1440x900 60Hz Chroma 2 Set to 32gray scale pattern Signal Generator 3 Set contrast to the maximum At most 6 bars cannot be distinguished Color 1 Do Auto color Balance at 1440x900 9 60Hz 32gray Chroma Signal Temperature scale pattern Generator and color analyzer Modes switching check 1 Use Chroma Pattern Generator to make sequence VESA 640x480 800x600 1024x768 1152x864 1280x1024 1440x900 60Hz the detail supported modes see table 1 and power saving signal 2 Confirm the above timing modes must be full screen and the picture must be normal 3 LED is amber at power saving mode Chroma Signal Generator VGA detector Y measurement at default setting cable When select VGA model and VGA cable is not plugged out self test OSD will be floated 1 Set brightness and contrast to default value 75 at 6500K 2 With full white pattern Y shall be 220 20 cd m Visual check Chroma Signal Generat
6. Button Menu on front bezel connects to 7105 TSUMS8EHJ LF 2 50 through CN104 1 0105 50 Voltage is defined as Menu Button SELECT on front bezel connects to U105 TSUMSSEHJ LF 2 122 through CN104 4 U105 122 Voltage is defined as SELECT LED Indicator on Front Bezel When press button power 105 TSUMS8EHJ LF 2 123 be send in low Voltage make Q107 3 sends out high Voltage and then to CNO1 5 on keypad LED green on b When in Suspend mode U105 TSUMS8EHJ LF 2 124 sends out a low Voltage make Q10843 sends out high Voltage and then to 1 7 on keypad LED Amber ON 2 3 4 MATAR CHIP U105 TSUMS8EHJ LF 2 U105 TSUMSSEHJ LF 2 91 100 output 8 bit even and 477 486 output 8 bit odd LVDS digital data to panel control circuit through CN103 U105 TSUMSS8EHJ LF 2 73 output PPWR H potential to make Q104 conducted and then make Q101 conducted 5V flow to CN103 1 3 as Panel Vdd U105 TSUMSSEHJ LF 2 109 output CCFL ON OFF L potential to control Inverter on off U105 TSUMSSEHJ LF 2 125 outputs Brightness PWM signals to control CCFL brightness TCLK by Crystal 14 318MHz input to U105 TSUMSSEHJ LF 2 4128 4127 U105 TSUMSSEHJ LF 2 108 is RESET signals input pin Please refer to U105 TSUMSSEHJ LF 2 Pin Assignments table in page 2 3 5 Regulator Circuit 3 3V is generated from Regulator U101 which is supplied by 5V via R101 and through C104 filterin
7. 10 PDRI 0 High Side Driver 1 11 VDDA I Input Power Pin 12 TIMER I Timing Capacitor for Delay Timer 13 PWM I Ecternal PWM Dimming Input 14 ISEN I Current Sense Feedback 15 OVPT I Over Voltage Protection Threshold Voltage 16 ENA I IC Enable Disable 19 Service Manual Chapter 4 Disassembly amp Assembly L 1 Exploded Diagram 39 1T3HS t t N V 7 N N I SLIN 27 25 WA NIN G b z EINA 5019911605 N OLN 590 0 4 Ma LIS 800900t0t0Z20S ratus 3 ozal AWN 1 CATE eM 002505910605 20406444 590 0 S 10010062166 uZ L l 5004 5 UN vd 0290691060 OI 9 84 SDD MROS 5 N S ZLOb W 1 08 1001609 7605 uz 6 84 SMM SDD 6 207906971606 D z 9 94 48 LMM 5800 4 105 YOOSEOTTIZ605 MB EZ 1 1550 4 105 Ola umed woa 3 1006110000101 0027590 sissaD j DANI HSINI 4 CAD 1129SS3N3M3IH1 OWINGLVA DN 1304 T Qui jai 01 K 591 Wa 6 100890001080 ug ST 48 6L OKINS 7 6 SY OMDR diva 8 000001072405 SEN SDT NDEN BEY 2 2 mM 1 BETH wy ese t Wd 9 006524720105
8. age At 5000 2 01 Descri pti on F2009W D115 LE20M9 A12 Base Qy PC 100 110010 4530708001508 FVR GORD 10 125V BLK 6FT U CSA SVT 3G 110020 453030300440R CABLE 18 MLE 1 SMHAK 1 0030 B 453010100320R CABLE D SLB 15P MLE 6FT HAK ELLE AB 8 1 0040 x 7140740A0000R ASSY FI NAL B WO SPK LE20M A12 DAQ 200 1 0070 x 713100009700 ASSY PACKAGE PAK DY IRM 11 714074000005 ASSY FINNL WO SPK LE20M A12 DAQ F200 210010 509212103500R SCREWF ROS T T 2 3 BLK 0020 5091166105108 SCREWP CROSS M 10 BLACK N NILCK 2 0030 7140112054007 Stand Assy 9 210040 7140300207008 Front Bezel Assy LE20N9 210050 714050019600R Back Cover Assy 9 0060 x 7140820400008 ASSY PANEL WO SPK 20 A12 F2009Wf 11 713100009700R ASSY PACKAGE PAX DO 1 9 210010 506250027500 LABEL ID IB LE20M 39 DELL Service Manual 2 0020 2 0030 2 0040 2 0050 2 0060 2 0070 2 0080 2 0090 2 0100 2 0110 2 0120 2 0130 2 0140 x 2 0140 x 2 0140 x 2 0140 x 2 0140 x 2 3 0010 3 0020 3 0030 3 0040 2 3 0010 3 0020 3 0030 3 0040 2 3 0010 3 0020 3 0030 3 0040 3 0050 3 0060 3 0070 3 0080 3 0090 3 0100
9. Auto adjust adjustable hot key 4 SELECT OSD input source Select control 5 LED Green LED Green on off control 6 GND Ground 7 LED Amber LED amber on off control 8 POWER Ground 14 DLL Service Manual 8 Key Parts Pin Assignments U105 TSUMS8EHJ LF 2 Analog Interface Pin Name PinType w 5V tolerant w 5V tolerant 31 REFP Internal ADC Top De Coupling Pin REFM ww Internal ADC Bottom De Coupling Pin RINOP Analog Input Analog Red Input Sync On Green Input BINOM Analog Input Reference Ground for Analog Blue Input 22 REXT External Resistor 390 ohm to AVDD_33 7 DVI Interface Pin Name PinType Function ein Negative DVI Input for Data Channel 0 Positive DVI Input for Data Channel 0 15 Negative DVI Input for Data Channel 2 10 Serial Flash Interface Pin Name Pin Type Function fem Input w 5V tolerant SPI Flash Serial Data Output Output SPI Flash Chip Select Output SPI Flash Serial Clock Output SPI Flash Serial Data Input 15 DELL Service Manual LVDS Interface Pin name PinType Function fin Lvaom Output LVDS A Link Channel 0 Negative Data Output s6 LVACKM _ LVDSA Link Negative Clock Output lvacke Output EVDS tink Positive Clock Output o LvBom Output LVDS Channel 0 Negative Data Output o LvBop Output LVDS Bink Channel O Positive Data Output 99 Lvem Output
10. thus regulating the output voltage If a CCFL is removed fails or damaged during normal operation CCFL current is no longer sensed and the voltage on ISEN pin drops The voltage at the SSTCMP pin2 rises rapidly because there is no current feedback at ISEN pin14 When the voltage at SSTCMP reaches a threshold of approximately 2V and ISEN is less than 0 7 V a current source charges the capacitor C3 connected to TIMER pin12 Once the voltage level at the TIMER pin reaches a threshold of approximately 3V the drive outputs shut down and latch To resume operation toggle the ENA signal or restart VDDA Over voltage and over current protection are monitored by the voltage on VSEN pin1 During normal operation if a CCFL is damaged or removed the voltage at VSEN exceeds the user defined preset voltage set by OVPT pin15 the driver output duty cycle is regulated and the shutdown delay timer is activated OVPT sets the overall protection threshold voltage that is lower than3 V VSEN threshold Once the voltage at TIMER pin reaches 3V the IC will shut down and latch OVPT voltage setting is determined by resistor divider R16 R8 connected to the OVPT 2 2 Power PWM circuit 2 2 1 AC Input and EMI Filter fig 2 2 1 F850 RT850 3 15A 250V L850 CHK 007 C852 499K 0 47uF X2 CN850 10A 250V R852 fig 2 2 1 CN850 is a connector for connecting AC Power F850 is a fuse to protect all the circuit AC Input voltage is from 9
11. D L Service Manual Attachment 3 PCB Layout power inverter bd power inverter bd Top Layer 148 00mm 130 00mm zd 30 3NVS AIND 3371433 344 30 HOILIILOYS 31 1800 804 LAYER FOXCONN PCB NO 491531400800R REV A P DESIGNER Inkai Qiu FILE NO 1 0 REMARK 2008 04 30 44 Service Manual D L Bottom Layer 2008 04 30 REV A P DESIGNER Inkai Qiu SILKSCREEN BOTTOM 491531400800R ILPI 090 LAYER PCB NO ILE NO FOXCONN 45 DOLL Service Manual I F board unt 702020107 CT OQ 9 S G 20040060 Bottom Layer 46 Service Manual 491351300100R HM DESIGNER Huilan Lai gt d b PR Lin 5 2 FBETFTOMSS SPCR USM 47 DOLL Service Manual Bottom Layer 48
12. LD7552B are implemented an OVP function on Vcc Whenever the Vcc voltage is higher than the OVP threshold voltage the output gate drive circuit will be shutdown simultaneously thus to stop the switching of the power MOSFET until the next on 2 3 I F Board Circuit see the Attachment 2 Schematic 2 3 1 RGB CAPTURE Signal RED GREEN BLUE input through CN102 1 2 3 Stop DC C113 C114 and C115 and then enter into U105 TSUMSSEHJ LF 2 analog input PIN 28 25 23 and then TSUMSSEHJ LF 2 deals with signal internally D103 D104 D105 are ESD protector to prevent U105 from ESD Signal DDC SCL series clock inputs via CN102 15 and then passes through ZD106 for ESD protection goes into EDID EEPROM IC U103 6 Signal DDC series data inputs via CN102 12 and then passes through ZD103 for ESD protection goes into EDID EEPROM IC U103 5 Signal TTL vertical sync Vsync inputs via CN102 14 and then clamped by ZD105 Zener passes through R134 and then goes into IC U105 TSUMSSEHJ LF 2 33 Signal TTL horizontal sync Hsync inputs via CN101 13 and then clamped by ZD102 Zener passes through R133 and then goes into IC U105 TSUMSSEHJ LF 2 32 CN101 5 is defined as cable detect pin this detector realize via R121 and U104 36 and D102 is ESD protector U103 5V is supplied by PC via CN102 9 with ZD102 for ESD protection or supplied by Monitor self via D106 U103 is an EEPROM IC which is memory and EDID data sa
13. 1000 50 R5 7 ENA VSEN 1 H 2 W01 05100 R31 1K N4 2 1 AK 2 WO1 05100 022N 3p 3 ci H L 0 BAS 24 27 a 25 5 L l 39 5 o e M 3 a 1 EN 5 2 B 1 Rio I zo P BAS 8 100K 5 6800pF 25 nF 50V 10K 1 c14 E Dell 22009 Inverter BD pee Docume nt Number Fe aa 6 1 Fig 2 1 DC 5 through R7 and C2 will provide power for Ul on the pin11 EN ON OFF voltage signal coming from scalar which is on IF BD will enable Ul to work During start up appling a voltage level greater than 2V to ENA pin16 enables the IC A voltage less than 1V will disable the IC If no current is sensed approximately 2 seconds Ul shuts off R21 is used to limit current C10 is used to dump noise C7 is used to soft start and then the voltage on pin 16 will enable U1 Once the voltage at the ISEN pin reaches the lamp on threshold the IC switches from the striking mode to the normal operation mode and the PWM dimming control is activated PWM duty cycle signal through R23 and C4 is Pin 13 PWM which adjusted will can change the brightness of Panel The striking and operating frequency is determined by the external resi
14. 105 C CF 18x40 2 5 SU SCON CAP SEK 100uF 450V M 105 C CF 18x40 2 5 ELITE 410500059290R XSTR AP27611 A N CH TO 220CFM ADVANCED P APEC 410050103050R XSTR FMAO9N65GX TO 220F FUJI RoHS FUJI 410050057280R XSTR 5 802 N CH TO220FP ST ST PCB P I 1 OSP CEM1 16 LE119E6 812 ROHS TATCHUN 491531400800R PCB P I 1 OSP CEM1 16 LE119E6 812 ROHS ME 412000652060R IC TSUMSSEHJ LF 2 PQFP128 MSTAR Rohs MSTAR 412000494190R SST25LF020A 33 4C SAE SOIC8 SST ROHS SST 412000498620R MX25L2005MC 12G SOP8 MXIC RoHS MXIG 412000494310R PM25LV020 100SCE SOIC8 PMC RoHS PMC 412000224482R _ IC AT24C16BN SH T 16K ATMEL SOIC 8 ROHS ATMEL 412000224280R M24C16 WMN6TP 508 16K ST ROHS ST 412000481990R CAT24C16WI TE13 SOIC 8 CATALYST RoHS CATALYST 412000332020R IC LD1117AL 3 3 A TO 252 UTC RoHS UTC 412000332130R AP1117D33LA 3 3 ANACHIP TO 252 3L ANACHIP 412000332830R AS1117R 3 3 TR LF TO 252 A1 SEMI RoHS A1SEMI 412000330020R _ IC LD1117AL 1 8V A SOT223 UTC RoHS UTC 412000330830R AS1117L 1 8 TR LF SOT223 A1 SEMI RoHS A1SEMI 412000330070R _ IC AZ1117H 1 8 SOT223 AAC RoHS BCD 41200043548116 AT24CO2BN SH T 2K SOIC8 ATMEL RoHS ATMEL 412000480280R M24C02 RMN6TP SO8 STJRoHS ST 412000480990R CAT24CO2WI TE13 SOIC 8 CATALYST RoHS CATALYST ATTACHMENT 1 Bill of Material 1 Interface board BOM 36 DELL Service Manual C Documents
15. 120 415502438551 5 2W 0 430 J MINI 5 FUTABA QUEENMAO TZAI YUAN 1 PC R859 130 415350511550 RES MOF 2W 5100 J MINI HK15 ROHS FUTABA QUEENMAO TZAI YUAN 1 PC R888 140 432009400701R 50 4A 104 P 5mm F RoHS THINKING UPPERMOST 1 PC RT850 1501426000050070R L FILTER 12mH LIN 007 ET 20 RoHS DARFON FOXCONN LISHIN MEIKAI NCE 1 PC L850 160 425000010530 COIL CHK 7 8X10 053 0 181085ROL CHILISIN EASYMAGNET FOXCONN FRONTIER 1 PC L854 1701411050012010R BRDG GBU405 600V 4A TSC RoHS TSC 1 PC D850 170 411050012020R DIO BRDG GBU4 06 BF52 600V 4A FEC RoHS FRONTIER O PC 180 411030068020R DIO SF50 04F69 LF 400V 5A DO 201AD FEC R FRONTIER 11 D854 1801411030068450 DIO SF55PT F 400V 5A DO 201AD CHENMKO RO CHENMKO O PC 1801411030071450 DIO SF56PT F 600V 5A DO 201AD CHENMKO RO CHENMKO 180 411030068520R DIO SF50GG E1 400V 5A DO 201AD LITEON R LITEON O PC 190 411090050090 5 SB5150F98 150V 5A DO 201AD PANJI 2 D856 D857 1901411090050020R SCHTKY SR515F69 LF 150V 5A DO 201AD FRONTIER 1901411090050450 SCHTKY SR5150PT F 150V 5A DO 201AD CHEN CHENMKO O PC 200 426000091160 XFMR SW DIP 22 P4 800uH SPW 116 ROHS DARFON FOXCONN HUALON LISHIN 1 PC T1 210 426000091150 SW DIP ER28 TP4 550uH SPW 115 ROHS FOXCONN FRONTIER LISHIN MEIKAI 11 T850 220 412140002380R LTV817M PR VDE LITE ON P 10mm RoHS
16. 3 0110 3 0120 3 0130 2 3 0010 3 0020 3 0030 3 0040 3 0050 506250027501R LABEL AGENCY TOO 99 1 20 506431007100R FI IMSCREEN PROIECII ON PRINTED LE20N9 506380001400R TAPE 3M897 12x45000nm 506280009101R POSTER QU SETUP VEST 9 703500009800R AGCESSCRY DOC DQ 9 506120300060R BAG PLASTI G 1670 WA0nmf PR 1 22 506120301810R BAG 1800 400XM5OMMIPIXO3 506020029500R CARTON TELL WW LE20M 506060013600R top LE20N9 506060013610R or bot t om LE20N9 506340004700R LABEL BLANK 101X50nm DELL EMEA CARIN 506380002622R TAPE VRAPPI NG TYPE DELL BAK 713010005400R ASSY PACK 20511 LE20M 01 713010005401R ASSY PACK 40511 LE20M 01 713010005402R ASSY PACK 40 LE20M 01 713010005403R ASSY PX K 20510 LE20M O1 713010005404R ASSY PX K Al RCARGY 40511 LE20M O1 7140300207008 Front Bezel Assy LE20N9 5010102220008 Front Bezel LE20M 5010302119008 Button 98 5011201100008 Pover 1 ens LF20M 501110200400R LOGO PLATE DELL UX383 1963 7140500196008 Back Gover Assy LE20N9 5010202259008 Back Gover LE20M 501030210220R rel ease butt on 76 502210100400R KENI NGTON IG K LE1963 5030100058008 SUPPORT 19 8 15 7140840A0000R ASSY PANEL WO SPK LE20M9 A12 E2
17. 300 411131056050R 7 5 6V 0 5W BZX79 C5V6 5 PHILIPS PHILIPS O PC 300 411120956950R ZENER 5 6V 0 41W BZT52 C5V6 SO D123 PANJ O PC 3101411020026210R DIO BAV99 350mW 70V SOT 23 PHI RoHS PHILIPS 2 ZD6 ZD7 3101411020026390R DIO BAV99 SOT 23 INFINEON RoHS INFINEON O PC 310 411020026090R DIO BAV99 350mW 75V SOT 23 PEC RoHS O PC 310 411020026020R DIO BAV99 LF 350mW 70 SOT 23 FEC RoHS FRONTIER O PC 320 410080003290 XSTR AP4575GM N amp P SO 8 APEC ROHS AP 2IPC Q6 Q7 320 410080003430 XSTR P5506NVG N amp P SOP 8 NIKO SEM ROHS NIKO O PC 330 410070010240 XSTR MMBT4401 NPN SOT23 FAIRCHILD RoHS FAIRCHILD 1 PC Q851 3301410070010420 XSTR MMBT4401 NPN SOT23 PANJIT RoHS 330 410070010210 5 PMBT4401 NPN SOT23 PHILIPS RoHS PHILIPS O PC 340 412000628810R IC LD7552BPS SOP8 Leadtrend ROHS LEADTREND 1 PC U850 350 412000654630R JIC INL833GN SOP16 02 MICRO Rohs 02 11 U1 360 791711410800R BOARD W O SPK AI LE19E6 812 ROH 1 PC 3701419312254070R C SMD 0805 X7R 2 2uF 16V K RoHS DARFON MURATA TDK WALSIN YAGEO 1 PC C3 2E 07 ITEM PIN Description Supplier Usage Un Location 791711410800R PCBA P I BOARD W O SPK AI 1 19 6 812 ROH 101791711450800R BOARD W O SPK AI A LE19E6 812 R 1 PC 20 791711460800R PCBA P I BOARD W O SPK AI R LE19E6 812 R 1 PC 2E 07 ITEM P N Description Supplier Usage Un Location 791711450800R PCBA P I BOARD W O SPK
18. Blue Active On Amber DPMS 1 Menu Call out OSD Menu and choose 2 symbol molded into button calls out brightness Contrast move up the highlight bar 3 symbol molded into button move down the highlight bar 4 Input select Select input signal 66 99 Automatic adjust Directly press Brightness Contrast Icon Directly press Auto Color Balance Purpose Automatically calibrate chip ADC parameter by using chip internal DAC Process If we want to do Auto Color Balance again please confirm the following steps 1 Connect the VGA cable with the standard video pattern generator and display the pattern with blackest and whitest colors 2 Press Power Key to power off the monitor 3 Press Menu Key and Up Key simultaneously and then press Power Key to power on the monitor 4 Press Plus Key and choose factory at bottom 5 Set Auto Color item to ON then execute Auto color item 6 After the Auto Color Balance process finished go back to the submenu of Other Settings and press Factory Reset to exit Factory mode 23 DAL Service Manual Menu Timer 24 OSD Control 4th Level Sth Level Main Menu Brightness Brightness Contrast m Auto Adjust For VGA Auto Select Input Source DVI D Input Color Format RGB YPpPr Mode Selection Graphics Video Pre
19. LVDS Bink Channel 1 Negative Data Output 98 Output LVDS B Link Channel 2 Negative Data Output GPIO Interface Pin Name PimType Function PWM0 Pulse Width Modulation Output 4mA driving strength GPIO P22 I O w 5V tolerant General Purpose Input Output PWM1 Pulse Width Modulation Output 4mA driving strength GPIO_P47 I O w 5V tolerant General Purpose Input Output 4mA driving strength 45 49 GPIO_P43 GPIO_P42 Input Output General Purpose Input Output 4mA driving strength 24 I O w 5V tolerant General Purpose Input Output 51 PWM2 Pulse Width Modulation Output 4mA driving strength 16 DLL Service Manual Pin Name Pin Type Function Pin GPIO_00 1 O w 5V tolerant General Purpose Input Output 4mA driving strength 55 57 GPIO 02 GPIO 06 1 0 w 5V tolerant General Purpose Input Output 4mA driving strength 4 1 0 w 5V tolerant General Purpose Input Output 73 PWM3 Pulse Width Modulation Output 4mA driving strength GPO P42 Output General Purpose Output 4mA driving strength GPO P43 Output General Purpose Output 4mA driving strength GPIO P25 1 0 w 5V tolerant General Purpose Input Output 109 PWM3 Pulse Width Modulation Output 4mA driving strength GPIO P26 1 0 w 5V tolerant General Purpose Input Output 110 PWMO Pulse Width Modulation Output 4mA driving strength GPIO_P27 1 0 w 5V tolerant General Purpose Input Output 111 PWM1 Pu
20. of U105 high low convertible when DC NO Change U105 on off gt END 32 DELL Service Manual 4 Power include IF 5V and 3 3V supply normal key function OK but backlight can t be turned on Backlight cannot be turned on is the Is the CN853 on off control signal come from IF ok inserted CN 103 OK Yes Is the on off control signal 109 of U105 high low convertible when DC on off No Is the voltage Is the frequency Pi at NO T850 39 m F850 Yes Is the low active reset signal at 105 of IF Board U105 normal Check U1 pinl I Voltage is SV Is the PWM signal at 125 of IF Board U105 normal when power AC on Check Ul pin2 Voltage is lower Update Firmware to Serial Flash U108 by VGA port with ISP Tool V4 100 exe after this process no the control signal yet change U108 YES Check T1 T2 pin7 and pin10 Open or Short Yes Change T1 T2 33 DELL Service Manual 5 Backlight on key function and LED accurate indication ok but no picture Backlight on key function and LED accurate indication ok but no picture YES YES IS the display is white and cannot Check DC 5 0V on NO Is the panel enable display OSD when press key CN101 1 2 signal at 73 of U105 if no check Q104 circuit or change NO U105 if yes Check 0101 circuit Is there RGB signal in NO U105 28 25 23 Change D103 D104 amp D105 Yes 1 VGA Is display selftest pictur
21. 0 4149044993106 RES SMD 1206 499 F RT RoHS REV A TA I UNIOHM WALSIN YAGEO 6 PC R841 R842 R843 R850 R851 R852 2101414904270210R RES SMD 1206 27kQ F RT ROHS TA I UNIOHM WALSIN YAGEO 3 PC R853 R854 R855 220 414908100910 RES SMD 0805 100 F RT ROHS TA I UNIOHM WALSIN YAGEO 1 PC R856 2301414908270010R RES SMD 0805 2700 F RT RoHS TA I UNIOHM WALSIN YAGEO 1 PC R857 2401414908330110R RES SMD 0805 3 3KQ F RT RoHS REV A TA I UNIOHM WALSIN YAGEO 1 PC R868 250 414908390110 RES SMD 0805 3 9KQ F RT RoHS TA I UNIOHM WALSIN YAGEO 1 PC R872 2701411023004021R DIO SN4148 LF 75V 0 15A SMD 1206 FRONTIER 1 PC D841 2701411020046090R DIO 1N4148W 75V 0 15A PEC RoHS SOD 123 PANJIT 2701411020046310R 010 1N4148W F 75V 0 15A DIODES RoHS SOD DIODES O PC 280 411020068020R DIO BAW56 70 SOT 23 FRONTIER RoHS FRONTIER 1 PC ZD1 280 411020068090R DIO BAW56 75V SOT 23 PANJITJRoHS O PC 2801411020068210R DIO BAW56 85V SOT 23 PHILIPS RoHS PHILIPS O PC 290 411020047410R DIO BAV70 70 SOT23 MITSUBISHI RoHS MITSUBISHI 2 202 203 290 4110200472106 010 70 85V SOT23 PHILIPS RoHS PHILIPS 2901411020047090R DIO BAV70 70V SOT 23 PEC ROHS O PC 2901411020047020R 010 BAV70 LF 70V SOT 23 FEC ROHS FRONTIER O PC 300 411131556950R 7 5 6V 0 5W BZT52C5V6 F SO D123 DIOD DIODES 2 ZD4 ZD5 300 411121456950R ZENER 5 6 BZT52 C5V6 SOD 123 WILLASJROH WILLAS O PC
22. 006900R GCRNER PAPER 950x50x50xT3nm 1E1712 3 0040 306039007800 CORNER PAPER 1150x50x50xT3nm 181511 3 0050 5064310003008 FI LMPE 500nmx900MR 5 0060 506380002612R TAPE VRAPPI NG TYPE 50M82nm 3 713010005402R ASSY PACK LE20N9 3 0010 506432004700R SLIP SHEET 11188146075 LE20M 3 0020 506037011100R CARDBOARD COVER L1188xW146xHOOxT3nmLE 3 0030 306039007800 CORNER PAPER 1150x50x50xT3nm 181511 3 0040 506039010000R GCRNER PAPER L1350X50X50XI3MMIPI1716 3 0050 506231000300 FI LMPE 500nmx900MR 5 0060 506380002612R TAPE VRAPPI NG 50M82nm 2 713010005403R ASSY PACK AIR CARGO 20511 9 3 3 0010 506150013600R PALLET L1188xW 146xH120nm LE20N9 0 506037011100R CARDBOARD COVER 11188xW146xH1O0xT3nmIH 3 0030 506039006900R CORNER PAPER 950x50x50xT3nm 1E1712 3 0040 506039001400R CORNER PAPER 200x50x50nm 0050 506431000300R FI LMPE 500nmx900MR 5 0060 506120400100R BAG ATR DUNNAGE 2000x1000nmiELX03 0 3063000026127 TAPE VRAPPI NG TYPE 50M82nm 2 713010005404R ASSY PAK AI 40617 9 310010 506150013600R PALLET L1188xW146xHI 20nm LE20M 0020 506037011100R CARDBOA
23. 009W 631102200330R0 LP 20 1 1 301 7 TIKX A LGD ROB 701000011900R Chassis Assy LE20M 506380001730R TAPE 85x20nm I F1913 509146306202R CROSS WWAS 7 8 MB 6 Zn Gc 5094463091008 SCREWB CROSS WWSPR Zn ROB 5090163052008 CSS NB 5 Zn Co 5090163062008 SREWI ORFS NB 6 Zn Co 5090000010008 BOLT 40 12 5 N 792241300A00R I F BOARD WO SPK LE20M A12 ROB 792241400700R PI BOARD WO SPK LE20M 712 ROB 7922415000008 PCPA KEYPAD BOARD LE20M 4303008022208 HRN ASSY 2x4P to 8P 380nm U 1571728 4303030019508 HRN FFC 198 5nm Wcore 713010005400R ASSY PACK 20511 LE20M 506432004700R SLI P SHEET L1188xW146xF7Snm 1 20 9 5060370111008 CARDBOARD COVER 11188xW146xHL00xT3nm 5060390069008 GORN R PAPER 950x50x50xT3nm 1712 5060390078008 CORNER PAPER 1150x50x50xT3nm 1E1511 5064310003008 FI LMPE 500nmx900M RIS 40 DELL Service Manual 310060 506120400100R BAG ATR DUNNAGE 2000x1000nmi 310070 506380002612R TAPE VRAPPI NG 50M82nm 2 713010005401R ASSY PACK 40511 LE20M 3 0 506432004700R SLIP SHEET L1188xW146xH5nm LE20M 3 0020 506037011100R CARDBOARD COVER L1188xW146xHOOxT3nmLE 3 0030 506039
24. 0V 264V R850 R85 land R852 are joined between two inputting main circuit to prevent man from shock L850 is used to clear up low frequency wave C850 and C851 are used to discharge the waves that L850 produced High frequency waves are damped by C852 2 2 2 High Voltage to Low Voltage Control Circuit fig 2 2 2 0850 n 15596 0 28 1W Fuse 4 1 4 TR R841 R853 854 2 499K T850 W D853 SPW 115 1 100uF 450 475 27K 47 R 7K INC P6KE2 11 842 R855 Signal GND 99K 27K 4 3 843 D851 8 FR10 10 499K R856 D852 4 5 1 C849 C855 SF10 04 3 0 01uF 50v PR 10uF 50V 2 Signal GNDR844 47R C860 3 vcc 8 OUT D841 U850 1N4148 LD7552B R848 9 5 NC RT 4 n AOOK 1 C846 50 NC Signal GND Q COMP 6 cs READ 47R 2 R859 C848 0 43R 2W 1 C847 1nF 50V X7R 1nF 50V X7R Signal GND Signal GND DELL Service Manual fig 2 2 2 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 highly integrated PWM controller Typical start up current for U850 is only 20 uA R841 R842 and R843 are serial circuit to limit current flow When current f
25. 10 14 953 ISEN BIK 6 4 B 206 2 1000 50 5 SSTCMP SPW 116 383 1 00K ENA vsen H 20 60 R18 047uF 50 51K 4 2 UT INL833 R21 07 ON OFF er KA AP4575GM 3 015509 22 20 100K co RS BAWO C15 R3 51k 4 2700 40 27k IM 2 C11 C16 27K 01 80 2700 50 SZ S 1 _ 3 202 2 BAVA R15 2 0 27K WO1 05700 022N ct R14 207 2700 50 27K BANOS t 13564019 R12 2 R19 mgs 3831 bead 54K 1 2 i 1 T R10 zoe 56 ce 100K 5 8800 25 nF DV KT 10K 1 14 822459 Dell E2009W Inverter BD NC R853 27K R854 CHK 007 R851 499K 0 0150 10uF 50 Signal GN O 47uF X2 C847 Signal_GND 1nF SDVIGR al GND 5 10 04 gt D853 NC P6KE20 222 2 F850 3 15 250 INTERFACE 43 T850 SPW 115 R863 8 SF50 04F69 C863 470uF 50 Bize Document Number Rev QLPI 090 1 0851 DR 1 1000p FYI N4401 356 585150 98 pF 1854 53 857 585150 98 DF C ASA SANZ 858 856 C857 4700 225 p F725 4T0uF 25V C871 O 1uF 50 C859 10NF 50V 0876 D 1uF 5DW R872 3 9K
26. 5 PG C9 C10 C871 C876 C26 80 419311030070R C SMD 0805 X7R 0 01uF 50V K RoHS DARFON TDK WALSIN YAGEO 3 PC C11 C849 C859 90 4149085101106 SMD 0805 5 1KQ F RT RoHS TA I UNIOHM WALSIN YAGEO 4 PC R1 R2 R11 R858 100 414908027350R RES SMD 0805 27KQ J RT RoHS TA I UNIOHM WALSIN YAGEO 4 PC R3 R4 R14 R15 110 414908390010R RES SMD 0805 3900 F RT RoHS TA I UNIOHM WALSIN YAGEO 2 R6 R19 37 DELL Service Manual 120 414908100310R RES SMD 0805 100 5 TA I UNIOHMWALSIN YAGEO R5 R22 R848 1301414908953210R RES SMD 0805 95 3KQ F RT RoHS TA I UNIOHM WALSIN YAGEO 1 PC R16 1401414908510210 RES SMD 0805 51KQ F RT RoHS TA I UNIOHM WALSIN YAGEO 2 R8 R18 1501414908010550 RES SMD 0805 1 J RT RoHS REV A TA I UNIOHMWALSIN YAGEO 2 R9 R10 1601414908100210R RES SMD 0805 10KQ F RT RoHS REV A TA I UNIOHM WALSIN YAGEO 8 PC R12 R13 R21 R23 R860 R884 R886 R887 170 414908330310 RES SMD 0805 F RT RoHS TA I UNIOHM WALSIN YAGEO 1 PC R17 1801414908100110R RES SMD 0805 1KQ F RT RoHS REV A TA I UNIOHM WALSIN YAGEO 4 PC R20 R24 R30 R31 1901414908047050R RES SMD 0805 470 J RT RoHS TA I UNIOHM WALSIN YAGEO 2 R840 R844 20
27. AI A LE19E6 812 R 101411032006020R DIO FR10 10 LF 1000V 1A AT FRO NTIER RoH FRONTIER 1 PC D851 101411032006040R DIO FR107 1000V 1A DO 41 MOSPE C RoHS MOSPEC O PC 101411020053090R DIO PS1010R 1000V 1A DO 41 PAN JITJRoHS O PC 20 411020064090R DIO ER104 400V 1A DO 41 PANJIT RoHS 1 D852 201411032001020R DIO SF10 04 LF 400V 1A DO 41 F RONTIER R FRONTIER 0 PC 30 415211009140R RES MF 1 8W 100 F AT RoHS QUEENMAO TZAI YUAN UNIOHM 1 PC R7 401415212703140R RES MF 1 8W 270 F AT RoHS QUEENMAO TZAI YUAN UNIOHM 1 PC R871 501411131430010R ZENER 30V GDZ30A DO35 WILLAS RoHS WILLAS 1 PC ZD880 501411130930010R ZENER 30 GDZ30A DO35 PANJITJRoHS PANJIT 601430613050100R FUSE SLOW PICO II 5A 125V U C AT ROHS LITTELFUSE 1 PC F851 601430613050101R FUSE SLOW 5A 125V U C AT ROHS WALTER O PC 70 491531400800R PCB P I 1 OSP CEM1 16 LE19E6 812 ROHS HSIANGKUO TATCHUN 1 PC 38 DELL Service Manual 80 4304050000006 JMPR ROLL KG D 0 6mm AT RoHS 7 5MM HOTRON YUANYE 550 J3 J5 J6 J7 J8 J10 J12 J9 J18 J15 J20 80 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 7 5MM HOTRON YUANYE 0 901430405000000R JMPR ROLL KG 0 6 5 10MM HOTRON YUANYE 100 MM J4 J13 901430405000000R JMPR ROLL KG D 0 6mm AT RoHS 10MM HOTRON YUANYE O MM 100 430405000000 JMPR ROL
28. DAL Service Manual LCD Monitor E2009W Service Manual Service Manual Versions and Revision No Version Release Date Revision 1 1 0 2008 9 1 Initial Release Copyright Copyright 2007 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 E2009 Service Manual DOLL Service Manual Table of Contents CHAPTER 1 PRECAUTIONS amp SAFETY NOTICES 3 1 SAFETY PRECAUTIONS re aa a cos am ere dar aku k a 3 2 PRODUCT SAFETY NOTICE ctt retener eret reb e ve ee ebd esee tue ee de ue deve s 3 3 SERVICE NOTES a kaa MR Sr a r sa a ss a sa 3 CHAPTER 2 SERVICE TOOLS amp EQUIPMENT REQUIRED 4 CHAPTER 3 CIRCUIT THEORY 5 1 BLOCK DIAGRAM Sitesi ee E FEEDER ERE 5 2 ELECTRONIC CIRCUIT THEORY u akaqa u ansa 7 3 FACTORY PRESET TIMING TABLE u 13 4 POWER ON OFF SEOUENCY qaa u u ya NE 13 5 D SUB CONNECTOR PIN 1
29. L KG D 0 6mm AT RoHS 15MM HOTRON YUANYE 100 MM J1 J2 1001430405000000R JMPR ROLL KG D 0 6mm AT RoHS 15MM HOTRON YUANYE O MM 1101430405000000R JMPR ROLL KG D 0 6mm AT RoHS 12 5MM HOTRON YUANYE 200 J11 J16 J17 J19 1101430405000000R JMPR ROLL KG D 0 6mm AT RoHS 12 5MM HOTRON YUANYE 0 120 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 17 5MM HOTRON YUANYE 50 414 120 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 17 5MM HOTRON YUANYE O MM 2E 07 ITEM PIN Description Supplier Usage Un Location 791711460800R PCBA P I BOARD W O SPK AI R LE19E6 812 R 20 420421000530R CAP SD 10uF 50V M VT 105 C 5x11 RoHS LELON SAMXON SU SCON TEAPO 1 PC C855 30 420424710231R CAP SD 470uF 25V M 105 VT 10x16 RoHS LELON SAMXON SU SCON TEAPO 3 PC C856 C857 C858 50 412022002240R IC KA431AZ 196 VT FAIRCHILD RoHS FAIRCHILD 1 PC 1851 501412022002550R AME431BAJATB25Z TO 92 3 AME RoHS AME O PC 50 412022002830R IC AS431 92 VT A1SEMI RoHS A1SEMI O PC 50 412022002840R IC TL431ACLPG TO 92 1 ON SEMI OJPC 501412022002440R IC AZ431BZ ATRE1 TO 92 BCD RoHS BCD 60 430613830290R FUSE TIME LAG 3 15A 250V RoHS BELFUSE CONQUER LITTELFUSE WALTER 1 PC F850 701418210233030R CD X7R 1000pF 1KV 2X7R102K102K5 JNC POE SUCCESS SEC 2 C862 C873 3 PCBA KEYPAD BOM C Documents and SettingsW3112725 1 4 Assembly BOM 2008 08 06 Dynamic List Mt eri al 8201MALDOTOR B ant
30. LITEON 1 1850 240 735110007800R ASSY H S Q850 LE19E6 812 ROHS 1 PC 250 791711440800R PCBA P I BOARD W O SPK SMT LE19E6 812 RO 1 PC 260 415350100550R RES 2W 100 J MINI HK15 RoHS FUTABA QUEENMAO TZAI YUAN 2IPC R861 R863 2E 07 ITEM PIN Description Supplier Usage Un Location 735110007800R ASSY H S Q850 LE19E6 812 ROHS 10 410050103050 XSTR FMA09N65GX TO 220F FUJI RoHS 1 PC Q850 101410500059290 XSTR AP27611 A N CH 220 ADVANCED APEC O PC 101410050057280 XSTR STP8NK80ZFP N CH TO220FP ST ST O PC 30 507300003300 HEATSINK L LE1713 1913 DMC ORIENTAL POWER 1 PC 401509146306200R SCREW P CROSS W WAS M3 6 Zn Cc GAOYI LIQUAN YIJIE 1 PC 2E 07 ITEM PIN Description Supplier Usage Un Location 791711440800R PCBA P I BOARD W O SPK SMT LE19E6 812 RO 101419312720070R C SMD 0805 X7R 2700pF 50V ROHS DARFON TDK WALSIN YAGEO 4 PC C1 C15 C16 C17 201419311054070R C SMD 0805 X7R 1uF 16V RoHS REV A DARFON TDK WALSIN YAGEO 1 PC C2 30 4193110200706 C SMD 0805 X7R 1000PF 50V K RoHS DARFON TDK WALSIN YAGEO 4 C4 C5 C847 C848 40 419312233070R C SMD 0805 X7R 0 022uF 25V K RoHS DARFON TDK WALSIN YAGEO 2 PC C6 C14 501419314730070R C SMD 0805 X7R 0 047uF 50V K ROHS DARFON TDK WALSIN YAGEO 3 PC C12 C13 C7 60 419312210070 C SMD 0805 X7R 220PF 50V RoHS DARFON TDK WALSIN YAGEO 1 PC C8 70 4193110400706 C SMD 0805 7 0 1uF 50V RoHS REV A DARFON TDK WALSIN YAGEO
31. Menu Press Plus Key to select Other Settings Menu then pop submenu and choose Factory reset Auto Color Balance Automatically calibrate chip ADC parameter by using chip internal DAC 5 1 If it is a new built set press Auto Plus button to execute Auto Color at standard video pattern 5 MOSAIC pattern 5 2 Please confirm the following steps to perform Auto Color Balance Connect the VGA cable with the standard video pattern generator and display 5 MOSAIC pattern on the monitor Press Power button to power off the monitor Press Menu and Auto Plus buttons simultaneously then press Power button to power on the monitor Press Plus Key select Other Settings Menu then Press Plus Key and choose factory at bottom Set BurnIn Mode item to ON then execute Auto Color item After the Auto Color Balance process finished go back to Other Settings Menu and press Factory Reset to exit Factory mode Upgrade Firmware to Serial via Flash Cable by ISP Tool V4 100 exe 7 1 Connect the monitor and PC follow Fig 11 27 DOLL Service Manual Connect to Monitor Connect to PC Connect to Fig 11 xX detailed reprggramming procedu ill be described in ISP lt Guide Ns Edid 8 4 rar Edid rar ISP User s Guide 20070312 rar ISP Tool V4 100 rar After repair to ensure the quality you should do the following test and adjustment 28
32. RD COVER 11188xW146xHLOOxT3nm 3 0030 506039006900R CORNER PAPER 950x50x50xT3nm 1E1712 3 0040 506039001400R CORNER PAPER 200x50x50nm 0050 506431000300R FI LMPE 500nmx900MR 5 3 0060 506380002612R TAPE VRAPPI NG TYPE 50M82nm 3 701000011900R Chassis Assy LE20N9 410010 502090314000R Chassi s LE20N9 410020 502020306000R fi x pl ate 1eft 19 5 410030 502020306010R fi x pl ate ri ght LEI986 410040 502040500000R sl i de 19 5 4j 0050 501010000300 SPRING 2 0 5 5 7 460 709112304100 SCREWBIP3x4C3UC RES 4 0070 502040400600R SHELDEM IP2207 Attachment 2 Schematic 1 Interface board schematic C Documents and C Documents and Settings 3112725 VtlSettings 3112725 Vs 41 DELL Service Manual 42 BELL Service Manual inverter board schematic R2 26 1 81 205 5 1 C20 0 1 50 204 5 1 546 546 WO1 05700 022N R30 1K C25 p 3Kv 0 047 50V VODA n CN2 RT 0047 50 2 5 iJ 9 Nort 8 L 10 7 RA c2 PORT GNDP A VWD1 DSTOD 022N p 1 c auus 1 7 4 er 3 8 3pi3 Ras 5 330K RIB VODA 1
33. Settings f3112725 3 i 2 power board BOM ITEM P N Description Supplier Usage Un Location 791711400800R PCBA P I BOARD W O SPK LE19E6 812 ROHS 101430637020030R WFR 2P P 3 5mm 90 W LOCK RoHS CVILUX FCN FOXCONN 4 PC CN1 CN2 CN3 CN4 20 4401490004006 5 10A 250V U C V CDJ 3 E4 BT3 6 0 TECX 1 PC CN850 30 430300801650 HRN ASS Y 8P 130mm 011007 24 AWG ROHS 1 PC 853 401420424710510R SD 470uF 50V 105 C F 13x21 RoHS LELON SAMXON SU SCON TEAPO 2 C20 C863 50 418103051920R CD NPO 3pF D S7 5 RoHS JNC SUCCESS SEC 4 PC 21 22 23 24 50 418103058920 CAP CD SL 3pF 65 JNC SUCCESS SEC 601418105051920R CD NPO 5pF D S7 5 RoHS JNC SUCCESS SEC 2 25 27 70 416202223620R MEY 2200pF 250V M Y2 Y5V W O FORMIN JNC POE SUCCESS SEC 2 C850 C851 801416194743011R CAP MEX 0 47uF 275V K X2 F15 RoHS ARCOTRONIC EUROPTRONIC HJC SCC 11 0852 90 420431014083 CAP SEK 100uF 450V M 105 C CF 18x40 2 5 ELITE SAMXON SU SCON 1 PC C854 1001416213323620R CAP MEY 3300pF 250V M Y1 F10mm W O FORMI JNC POE SUCCESS SEC 1 PC C860 1101416304723510R CAP 0 0047uF 250V J F7 5 RoHS EUROPTRONIC HJC SCC 1 PC C875
34. TROUBLE SHOOTING 4sississseososessseesossesoo5casnni0niaianoannnnaa nn Dani adana anda na Dann ieee ie e 30 1 COMMON ACKNOWLEDGE SPP 30 2 NO POWER LED OFE c V 30 3 POWER NORMAL LED AMBER ug au VERE au a RR 31 4 BACKLIGHT CAN T BE TURNED ON ene E n 33 5 NO PICTURE BACKLIGHT SRS a 34 6 AT 32 GRAY SCALE PATTERN COLOR LOST IN SOME 35 CHAPTER 7 RECOMMENDED PART LIST 35 ATTACHMENT 1 BILL OF MATERIALIA 37 ATTACHMENT 2 lt 47 ATTACHMENT 3 PCB LAYOUT 60 DELL Service Manual Chapter 1 PRECAUTIONS amp 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 corre
35. ch condition The off mode can be released when the pull low signal is removed When 0850 are turned off the main current flow will be consumed through D851 C875 R853 R854 and R855 This will prevent Q850 from being damaged under large current impulse and voltage spike 2 2 3 DC 24V and 5V Output Circuit and Feedback circuit fig 2 2 3 5361 C862 10R 1 1000p Fi 1 KY 5 50 0 c S63 470uF 0355 gt SF50 04F69 1850 SPU 115 L854 CHK 053 C858 C856 ces 25 70 557 F 25 70 5 x 74 5A S425 C876 D 1uF SDW R371 270K 5857 270R 3 9K O 1uF 40 C859 1OnF 50 VS Signal GND fig 2 2 3 DELL Service Manual D854 amp D855 are used to rectify the inducted current R861 amp C862 are used to store energy when current is reversed The parts including C863 is used to smooth the current waves that are from D854 amp D855 and then 24V voltage is supplied D856 amp D857 are used to rectify the inducted current C873 are used to store energy when current is reversed The parts including C856 C857 C858 C876 and L854 are used to smooth the current waves that are from D856 amp D857 and then 5V voltage is supplied 24V and 5 supply voltage feed back to PWM controller U850 via R871 R872 R868 and 1850 1851 R860 C859 and C871 used to control respond time
36. ct power sources indicated on the rating label on the rear cover of the monitor If you re unsure the power supply in your residence consult your local dealer or Power Company Use only the specified power cord that comes with this monitor Donottry to repair the monitor by yourself as it contains no user serviceable parts This monitor should only be repaired by a qualified technician Do not remove the monitor cabinet There is high voltage parts inside that may cause electric shock to human bodies Stop using the monitor if the cabinet is damaged Have it checked by a service technician Put your monitor only in a lean cool dry environment If it gets wet unplug the power cable immediately and consult your closed dealer 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 Do place heavy objects on the monitor or power cord PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage wattage etc Before replacing any of these components read the parts list in this manual carefully The use of substitute replacement parts which do not have the same safety characteristics as specified in the parts list may crea
37. e at VGA mode or DVI mode DVI Is there DVI signal in U105 9 YES Are there data output on YES Is the FFC cable 10 12 13 15 16 18 19 U105 77 86 inserting ok if no 1491 4100 reinsert else change FFC cable No Change U105 Change D202 D203 D204 D205 D206 D207 D208 D209 END 34 DELL Service Manual 6 At 32 gray scale pattern color lost in some scale NO NO Chapter 7 RECOMMENDED PART LIST Dell V1909WFPf Critical Components List Content PN Description Supplier Usage Leadtime PI BD 412000628810R IC LD7552BPS SOP8 Leadtrend ROHS LEADTREND 412000654630R IC INL833GN SOP16 02 MICRO Rohs 02 XFMR SW DIP ER28 TP4 550uH SPW 115 ROHS FOXCONN 426000091150R XFMR SW DIP ER28 TP4 550uH SPW 115 ROHS FRONTIER XFMR SW DIP ER28 TP4 550uH SPW 115 ROHS LISHIN XFMR SW DIP ER28 TP4 550uH SPW 115 ROHS MEIKAI XFMR SW DIP EEL22 P4 4 16H SPW 116 ROHS DARFON XFMR SW DIP EEL22 P4 4 16H SPW 116 ROHS FOXCONN 426000091160R XFMR SW DIP EEL22 P4 4 46 SPW 116 ROHS HUALON XFMR SW DIP EEL22 P4 4 46 SPW 116 ROHS LISHIN 420431014083R CAP SEK 100uF 450V M 105 C CF 18x40 2 5 SAMXON 35 DELL Service Manual IF BD CAP SEK 100uF 450V M
38. e do it at condition of Windows shut down pattern Please confirm the R G B color under 32gray scale pattern This LCM is analog interface So if the entire screen is an abnormal color that means the problem happen in the analog circuit part if only some scale appears abnormal color that stand the problem happen in the digital circuit part If you check the H V position please use the crosshatch pattern 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 If brightness uneven repairs Inverter circuit or change a new panel If you find the vertical line or horizontal line lost on the screen please change panel If the self test pattern is moving on the screen please check whether VGA Cable is plugged in the Monitor or PC if select analog model on OSD or check whether DVI Cable is plugged in the Monitor or PC if select DVI model on OSD If the VGA or DVI Cable is plugged in well please change another VGA or DVI cable No Power and LED Off Is there DC24V at C863 Is there DCSV at L854 Is the voltage at C854 in the range of 127V 339V Check RT850 F850 Is the voltage at pin7 of U850 18V YES NO Check R862 Is the voltage at pin6 of U850 0 9V YES Is the voltage at pin8 amp pin9 of T850 38V YES Check Q850 Check D852 30 DELL Service Manual Power include IF 5Vand 3 3V supply normal but LED off and n
39. g 1 8V is generated from Regulator U102 which is supplied by 3 3V through C106 filtering 3 FACTORY PRESET TIMING TABLE Standard Resolution Horizontal Frequency Vertical Frequency KHz Hz 640 x 480 31 469 59 940 640 x 480 37 500 75 000 800 x 600 37 879 60 317 800 x 600 46 875 75 000 1024 x 768 48 363 60 004 vr 1024 x 768 60 023 75 029 1152x864 67 500 75 000 1280x1024 48 483 60 042 1280x1024 60 087 75 034 1680x1050 55 935 59 887 IBM DOS 720 x 400 31 469 70 087 4 Power On Off Sequency Hardware power On Off When power cord plug into AC socket Power provides 26V and DC 5 DC 5 is main voltage for panel and Regulator U101 DC 3 3V is coming from Regulator 0101 DC 3 3v is main voltage for U105 When DC 3 3V input to U105 and U105 reset circuit active U105 all registers will be set to default that means finish hardware power on When pull out power cord from AC socket the system shut down instantly for no supply Software power On Off When press power key U105 4 receives low pulse then 7105 TSUMSS8EHJ LF 2 will be wake up 11 DELL Service Manual and send control signals at 73 109pin to on CCFL and switch 5 0v to panel module at the same time U105 make the VGA DVI cable input signal source display normal on panel if the VGA DVI cable input signal is active If power ON U105 123 LED blue will send out low potential and then LED blue on If power
40. ge of the serial clock 6 5 provide the timing of serial interface Commands addresses or input data are latched on the rising edge of the clock input while output data is shifted out on the Falling edge of the clock input 1 HOLD To temporarily stop serial communication with SPI flash memory without resetting the device 8 VDD P To provide power supply 18 DELL 8 3 U850 LD7552B PWM Power Controller Service Manual Pin Symbol Description 1 GND Ground COMP I Voltage feedback pin by connecting a photo coupler to close the control loop and achieve the regulation 3 VCC I Supply voltage pin 4 RT I This pin is to program the switching frequency By connecting a resistor to ground to set the switching frequency 5 NC Unconnected pin 6 CS I Current sense pin connect to sense the MOSFET current 7 VCC I Supply voltage pin 8 Out 0 Gate drive output to drive the external MOSFET 8 4 U1 INL833 CCFL Inverter controller IC Pin Symbol Description 1 VSEN I Voltage Sense Feedback 2 SSTCMP I Capacitor for Soft Start and loop Compensation 3 CT I Timing Resistor and Capacitor for Operation and Striking Frequency 4 RT I Timing Resistor for Striking Frequency 5 GNDA Signal Ground 6 PDR2 0 High Side Driver Output2 7 GNDP Power Ground 8 NDR2 0 Low Side Driver Output2 9 NDRI 0 Low Side Driver
41. low through R841 R842 and R843 gets to Pin 3 of U850 with VDD hold up capacitor C855 850 is enough for starting up When 850 begins to work Pin8 of U830 will output square wave to drive Q850 and then the main current flow get to GND bypassing through 1850 Q850 Because of the change of current flow wires in the other side of T850 will induct current At the same time the current inducted by wires which connected T850 Pin 5 and Pin 6 with components of D852 R856 C855 and C849 will be supplied to 850 for normal operating When the sense voltage across the sense resistor R859 reaches the threshold voltage around 0 85 V the output GATE drive will be turned off Every time when the output of power supply is shorted or over loaded the FB voltage will increase the build in PWM output will then be turned off Both will prevent the power supply from being overheated under over loading condition The PWM duty cycle is determined by this current sense signal and VFB the feedback voltage The voltage feedback signal is provided from the TL431 at the secondary side through the photo coupler to the COMP pin of the LD7552B When the voltage on sense pin reaches Vcomp Vcomp 2Vf 3 switch cycle will be terminated immediately Vcomp is internally clamped to a variable voltage around 1 2 V for output power limit The LD7552B can be turned off by pulling COMP pin lower than 1 2V The gate output pin of the LD7552B will be disabled immediately under su
42. lse Width Modulation Output 4mA driving strength GPIO_07 1 0 w 5V tolerant General Purpose Input Output 4mA driving strength 115 GPIO_10 1 1 w 5V tolerant General Purpose Input Output 4mA driving strength 1 SARO SAR ADC Input GPIO 01 1 0 w 5V tolerant General Purpose Input Output 4mA driving strength 1 SAR1 SAR ADC Input GPIO 2 1 0 w SV tolerant General Purpose Input Output 4mA driving strength 1 SAR2 SAR ADC Input 1 0 w 5V tolerant General Purpose Input Output 4mA driving strength 122 SAR3 SAR ADC Input GPIO 1 0 w 5V tolerant General Purpose Input Output 6 12mA programmable 123 driving strength 7 1 0 w SV tolerant General Purpose Input Output 6 12mA programmable 124 driving strength P13 1 0 w 5V tolerant General Purpose Input Output 125 PWM2 Pulse Width Modulation Output 4mA driving strength Misc Interface Pin Pin Type Function dem BYPASS For External Bypass Capacitor 102 Output Regulator Control 18 19 20 21 03 Input w 5V tolerant Chip Reset High Reset 108 MODE Input Chip Configuration Input 10K ohm pull low for normal 37 operation 17 DOLL Service Manual pin Name Pin Type Function pin DDCD SDA 1 0 w 5V tolerant DDC Data and HDCP Slave Serial Port Data for DVI 5 Interface 4mA driving strength DDCD_SCL Input w 5V tolerant DDC Clock and HDCP Slave Serial Po
43. o display Is the key function OK Yes Press power key to DC on the monitor NO if display ok the process is end if no display see the no backlight process Change U 105 Is the frequency 14 318MHz at NO 127 128 of IF Board U105 Change crystal X101 Yes 1 1 Change 164 Is the low active reset signal at 4108 of 9 IF Board U105 normal NO Yes Yes Change U105 Is the PWM signal at 125 of IF Board NO Change U1OS U105 normal when power AC on Upgrade Firmware to Serial Flash U108 by VGA port with ISP_ Tool V4 100 exe Power include IF 5Vand 3 3V supply and display normal only LED off NO Is the keypad cable connective OK Reassembly or changing Yes Is LED at keypad work OK Change LED Change R165 es Is R165 open NO Change Q107 Change U105 Is Q107 work normal Yes Is theLED control signal at 123 of U105 high low convertible when DC on off END DELL Service Manual Power include IF 5Vand 3 3V supply and display normal but LED Amber Is Power LED Amber 5 Do the Hsync amp Vsync Signals exist Insert VGA Cable correctly in CN102 13 amp 14 separately when select VGA mode by OSD Do the Hsync amp Vsync Signals exist in R133 amp R134 Check R133 amp R134 Do the Hsync amp Vsync Signals exist U105 32 amp 33 SR Is the Q108 work normal Change Q108 Is theLED control signal at 4
44. or and Color Analyzer OSD Lock Test Panel Flicker check Soft Lock When OSD is locked this icon should appear for only 2 seconds with all buttons pressed except for the Menu and Power ones Hard Lock Press Menu button for 15 seconds enables the locked icon to be displayed which will lock All buttons expect for the Power Press Menu button for another 15 seconds enables the unlock icon to be shown 1 Mode 1440x900 60Hz 2 Set Brightness amp Contrast to default value 75 3 Do Auto Adjustment 4 Shut down PC to check whether there s flicker on the center of the picture Visual Inspection Equipment Chroma Signal Generator amp PC Power saving 1 Mode 1440x900Q60Hz 2 Pattern full Black 3 Brightness Max 4 Contrast Default 5 Check power consumption at each modes State Power Consumption LED color Normal with full load lt 37W green Stand By lt 2W amber Power Key Off lt 1W T 29 Chroma signal generator and Power meter AC input 230V 50Hz DELL Service Manual Chapter 6 TROUBLE SHOOTING Common Acknowledge If you change the M B be sure that the U103 U201 and U108 these three components also changed to the new M B because there was program inside If not please re write EDID or upload firmware into serial flash U 108 How to do please refer to the Page 19 If you adjust clock and phase pleas
45. ows point out the direction of disassembly 21 DELL 3 Assembly Block Service Manual LE20M9 ASSEMBLY BLOCK Chassis 1 slide 1 1 spring 2 fix plateL 1 P cross T T 3 4 Zn fix plateR 1 P cross T T 3 4 Zn 1 EMI clip Back cover I kensington lock 1 VESA release button 1 support rubber 4 BACK COVER ASSY 1 CHASSIS ASSY 1 VF board 1 FFC CABLE 1 P Cross W WAS M3 6 Zn Cc 2 BOLT 44 40 ND 4 Y Power board 1 P Cross W WAS M3 6 Zn Cc 3 B Cross W WAS M3 9 Zn Cc 1 I Cross M3 6 Zn Cc 2 panel 1 L Cross M3 4 Zn Cc 2 CMO SAM AUO TAPE ACE 85x20mm 1 1 PANEL ASSY 1 P Cross M4 10 BLACK NL 4 Note 1 The arrows point out the direction of assembly 22 power LENS 1 1 Button_Function 1 1 front bezel 1 1 logo plate 1 keypad board 1 Screw P Gross T T 2 3 BLK 4 FRONT BEZEL ASSY 1 STAND ASSY 1 FINAL ASSY 1 DAL Service Manual Chapter 5 TEST AND ADJUSTMENT 1 Function key Definitions Enter Power Power Switch with power LED indicator Front Panel Controls Hot Key Function Factory Modes Keys Function Power On Off includes power indicator and Power ICON
46. rt Clock for DVI Interface I O w 5V tolerant DDC Data for Analog Interface UART Transmitter General Purpose Input Output 4mA driving strength I O w 5V tolerant DDC Clock for Analog Interface UART Receiver General Purpose Input Output 4mA driving strength I2C MDA 1 0 w 5V tolerant I2C Master Data 38 GPIO_P11 General Purpose Input Output 4mA driving strength 2 I O w 5V tolerant I2C Master Clock penn P10 NUR j k Input Output 4mA driving strength XN Crystal Oscillator Input Oscillator Input as XOUT Crystal Oscillator Output Innan E Power Pins Pin Name Pin Type Function n AVDD 33 3 3V Power Analog Power 34 44 50 52 60 VDDP 3 3V Power Digital Output Power 14 67 95 103 115 VDDC 1 8V Power Digital Core Power 12 68 97 117 13 38 41 47 96 116 No Connects in name pin Type Function NC No connects 1 3 5 10 15 18 80 94 98 101 128 8 1 U108 Serial Flash Pin Symbol Description 1 CE I The device is enabled by a high to low transition on CE CE must remain low for the duration of any command sequence 2 so transfer commands addresses or data serially into the device 3 WP I O The write protect WP pin is used to enable disable BPL bit in the status register 4 VSS G Connect ground 5 SI To transfer commands addresses or data serially into the device input are latched on the rising ed
47. saveing U105 124 LED Amber will send out low potential and then LED Amber on If power ON or power saveing when press power key U 105 4 receives low pulse then U105 will be sleeping and turn off backlight at the same time the panel will lose 5 V The Panel Vcc Backlight En CLK DATA output to panel will follow the following sequency 12 DELL Power supply for panel 5V Vpp Signals Digital RGB HS VS DE CLOCK OV Valid data W T T4 Power supply for backlight Service Manual T1 ms 2 ms ms T4 ms T5 ms T6 ms T7 ms SPE Sansung 0 3 10 0 0 50 gt 500 gt 100 0 0 50 NA gt 1000 SPEC AD 0 5 10 0 0 50 200 200 0 5 50 NA gt 1000 5 D SUB Connector Pin Assignment 5 1 15 11 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 3 Cable Detect 10 GND 15 DDC SCL 6 AC Outlet Pin Assignment Pin Symbol Description 1 3 1 Line 2 GND CN850 3 Neutral 7 Inner Connector Pin Assignment 7 1 CN103 Connect M B to Panel Pin Symbol Description 1 Panel Panel power supply typ 5 0V 2 Panel power supply typ 5 0V 3 Panel_Vcc Panel power supply typ 5 0V 4 NC 5 NC 6 NC 13 DELL Service Manual
48. set Modes Standard Video MultiMedia Game Color Setting Warm sRGB Reset Color Settings Cool Back Custom R G B Green Horizontal Positon Vertical Position RGB YPbPr Sharpness Display Settings Pixel Clock Phase Reset Display Settings Other Settings Language English Espafiol Language Francais Menu Transparency Deutsch Brasil 0000 DOLL Service Manual Menu Lock Unlock Lock DDC CI Enable Disable LCD Conditioning Enable Disable Factory Reset Reset All Enable Disable settings Factory Mode Introduction With signal input press Power button to turn off the monitor Press Menu and Auto Plus buttons together and then press Power button to turn on the monitor After power on press Menu button to call out Main Menu Fig 9 Press Plus Key select Other Settings Menu then pop submenu and choose Factory to enter Factory mode Fig 10 Dell E1909 4 Fig9 25 B R 43 120 Pens Scaler High Off i maaa 2006 IRE O tras LCD supplier Samsung AUO Burn in pattern 90 Value AM m RE Panel Supplier P N 19 W LTM190M2L31 19 W M190PW01 26 Service Manual Dell P N GW843 MY228 DOLL Service Manual method as followe plugging in the VGA DVI cable press Menu button to call out OSD Main
49. stor R17 R16 and C8 connected to Pin 3 and Pin4 DRV1 and DRV2 of Ul are used to drive Q6 and Q7 DRV1 and DRV2 are controlled by build in PWM IC Q6 and Q7 are switches which has two build in N P IGBTs The voltage signal on negative pole of ZD6 ZD7 sensed through R6 R19 comes to Pin14 of U1 ISEN Lamp Current Detection amp Control The CCFL current is detected through R6 R19 and reaches a regulated value The CCFL current detected at resistor R6 R19 is converted to a voltage level and input to the ISEN pin Once the lamps are ignited and the voltage at pin14 ISEN is gt 0 7V the IC enters the normal operating mode and the PWM dimming control is activated C5 C6 C14 is used to dump noise Once the CCFLs are ignited and current is sensed through resistor R6 R19 capacitor C5 performs the loop compensation function The voltage at IC pin2 controls the drive duty cycle of the power MOSFETs to regulate the CCFL current The control loop regulates the average current through the lamps by adjusting the overlap of the output drives The transformer T1 secondary winding leakage inductance and output capacitance C25 C27 forms a lower pass filter which converts the square wave driving signal into a sinusoidal output voltage signal for CCFL DELL Service Manual The over voltage protection feature is implemented by using an extermal capacitor devider C1 C15 C16 C17 to sense the output voltage The divide down voltage signal is sent to the IC Pin1 VSEN
50. te shock fire or other hazards SERVICE NOTES When replacing parts on circuit boards clamp the solder wires around terminals before soldering Keep wires away from high voltage high temperature components and sharp edges Keep wires in their original position so as to reduce interference Adjustment of this product please refers to the user manual Use Pb free solder wire for circuit board preparation DOLL Service Manual Chapter 2 SERVICE TOOLS amp EQUIPMENT REQUIRED SIGNAL GENERATOR MULTIMETER SCREW DRIVER OSCILLOSCOPE Soldering IRON SOLDER Lead free ROHS compliance Color Analyzer Fox_VISP_Programmer Fox VEDID Programmer DAL 01 joueg 14929 Lamp1 Lamp2 INVERTER 1 4 e Transformer Lamp3 LT 4 POWER Service Manual Chapter 3 CIRCUIT THEORY Block Diagram There are 4pcs PCBA in this monitor one is power amp inverter board which is a single layer board one is interface board one is keypad which is OSD control The system function block diagram as below This PWA is included switching power supplier inverter for CCFL and interface board fig 1 Brightness Control MOSFET MOSFET Lamp4 A
51. ved in it 2 3 2 DVI CAPTURE Differential Signal input RX0 RX0 RX1 RX1 RX2 RX2 RXC RXC through CN201 18 17 10 9 2 1 23 24 via R206 R205 R204 R203 R202 R201 R207 R208 enter into U105 TSUMSSEHJ LF 2 Digital input terminal 16 15 13 12 10 9 18 19 and then TSUMS8EHJ LF 2 deals with signal internally D206 D207 D204 D205 D202 D203 D208 D209 are ESD protector to prevent U105 from ESD Signal DDC_SCL series clock inputs via CN201 6 and then passes through ZD204 Zener for ESD protection via R209 goes into EDID EEPROM IC U201 6 Signal DDC_SDA series data inputs via CN201 7 and then passes through ZD203 Zener for ESD protection via R210 goes into EDID EEPROM IC U201 5 CN201 15 is defined as cable detect pin this detector realize passes through R216 into U105 49 and D210 is ESD protector U201 5V is supplied by PC via CN201 14 through D201 or supplied by Monitor self via D201 U201 is an EEPROM IC which is memory and DVI input EDID data saved in it 2 3 3 Buttons Control Button Power on front bezel connects to U105 TSUMSSEHJ LF 2 4 through CN104 8 U105 4 is defined as power on off Button on front bezel connects to U105 TSUMSSEHJ LF 2 120 through CN104 2 U105 120 Voltage is defined as Plus Button on front bezel connects to U105 TSUMSSEHJ LF 2 121 through CN104 3 0105 121 Voltage is defined as Minus 10 DELL Service Manual

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