HP L1940T GM5321 A00
Contents
1. res pHs res mwee ersoanpronsum _ CHIPR 4 7K OHM 5 1 16W Lm was iro sem ewer os mre HP L1940T 1936 0778 604 1FD SWI 1P 1505 12V V 1MM5 1 000 6931 081G 14500 KB LED VS SM KAA 3528YSGC KIEL R 1 000 EN 64 AAA KUN A GE H 11 57 ERR H ERA EXT TEUER TRI IIR DIN AOC Service Manual HP L1940T GM5321 D Service Manual LCD HP AOC Service Manual HP L1940T C Documents and Settings qiufen mao Application Data Microsoft Templates Normal dotm 2005 12 26 10 33 00 160 2008 1 24 10 34 00 Administrator 743 27 2008 1 24 10 39 00 7 349 24 41 893 72. FS Pos POS _ POS FS FS Pos SCREENRESOLUTON Pos Pos GORNERPWER FS ES CM wa __ 04 Pos 53 HP L1940T ______ sus Fos emen sas TAPENG SGREW wir WAGHER aooo FOS wan raames PANEL LCD 19 E5 L05 C1 D CMO 1m Pos Fos msswwrww 09 GOWROLRUTON Pos e WANFRAERSY esaen WANFRMEUL PO I as mo man GOWERSONSOWO LOW E S R 470UF 20 25V
3. eem 59 von gt sam ____ 129 ven anso vesa 74 sum 2892 von eee eor mie sooo vesa sr me 79 wee xs ven ses wwe ven wee 100000 m mn wes m _ 4 3 Power Supply Requirements AC Input Voltage 90 to 265V AC Input Frequency 47 to 63 Hz Inrush Current 50A MAX AT 220VAC and 30A AT 120VAC Leakage Current 5 mA MAX at 120VAC HP L1940T 5 Panel Specification 5 1 General Feature Wide viewing angle High contrast ratio Super fast response time High color saturation SXGA 1280 x 1024 pixels resolution DE Data Enable only mode LVDS Low Voltage Differential Signaling interface ROHS Compliance STE 32H 066 190 diagonal mm m _ _____ PixelNumber 12 1280xRGB x1024 piel Pixel Pitth 0294 Hx0294 V _ PixelArrangement 7 RGBvercalstipe _ Display Colors 105 TransmissiveMode NommadlyWhite _ Hard coating 3H Anti glare Haze 25 HP L1940T 5 2 Optical Characteristics Test Conditions 5 Signal to typical orit ELECTRICAL in 3
4. Click this button Fig 11 a 8220 Em 97m D 2 Select the DDC2Bi as the communication channel As shown in Fig 12 Configuration Setup conmunicetion channel C Cancel AOC 04 COTE Select 5232 Settings AOC 9 1OAE 105E C BoEtrare only Select COM com RET Select Paud 15258 Factory nemory data write Seriel Number Enable Mapped page address ro Full Fa Select Communication Bevo Fig 12 DC Menitar must be enter fastory n Ries tar not be anter factos EEPROM Type 24002 Used 3 Click OK button to confirm your selection 4 Click icon Read EDID function read DDC EDID data from monitor The EDID codes will display on screen as shown in Fig 13 38 HP L1940T ZEDIDL ing file ee a a a endet Praduet Ddenptkfiset 1 IE Manefscterer Nae it Code i 15 Serie Bask of 06 60 Fb 00 6 6 OT 2001 btb Versio bev Leon Ter nice E 4 SSESSRSSSLSERESS SSSRESSESSES SERS PEBZSPIJESPPEESIS BEBSASSESS
5. pa 21221180551 012211806589 1M OT 3417 ur BVOC poc w D 3413 4TR DOCOWLA 1104 sags amm TMDS 198 LV ET Lv 13 HOST AMAT Di A4 MOST AMAT DO 9 168 PDOERID LV E POWER LV E Le POQERD 1 POYERS CHEN Lv E CHZP LV E CHIN LV E POWERS CHIP LV E POMERAT Lv E PDEEGU CHOP Lv E POSEGU L v E pons 1 BOTUEGX 1254 CHWE 8 ah 0 lt 9 5 1 J5 28 29 at pOibEBN PO LV D Praag RESERVED POH ERS RESERVED PDOZLEBR RESERVED PrOXEBT RESERVED JTAG RESET RESERVEDS HP L1940T 10 11 Fat 173 KEYI 3138 158 6152 KONINKLIJKE PHILIPS ELECTRONICS 2000 1 42 10 11 ui cs U E10 5 us E9 10 ES Wi Wiz Wid Wis B5 Uig Wi c5 Uig 19 B5 20 5 u i U31 210 u32 010 433 210 uas 72 62 US U74 185 3 1410 5 1411 1412 12 2401 A1 2402 B2 2403 2404 B2 2405 2 2406 3 2407 3 2408 2 2405 B2 2410 BZ
6. Ber SH Serial IP Serial Baber Data Geek sd 52 wae Teer ef 20230 Step 4 Modify DDC data Monitor Serial No 1 Click Next bring up Fig 32 Vidas Input Definition E intel Xpgmal Laval Compatible with 1 171117 ary u 1 laag Sine En Transfer Chererteristic Wasaa 1 47 HP L1940T 2 Click Next bring up Fig 33 Fig 33 Fig 34 3 Click Next bring up Fig 34 Timings MT odussaticity Fhite print valos VESA ipla 00 li bn Banie display ps C sala cile dal 455 fo Teer 602 404 TIM po Tat Intels Balen E Ten F 514 celer 2 10042760 fet Preferred Haing 5 5 ge FJ EEE 7 ple Man 1 5 7 70 gt Fig 33 4 Click Next bring up Fig 35 5 Click Next bring up Fig 36 Pii Clock p
7. 4 5 ns 1 5 n E E 2 gt gs 6 5 te EU 5 _ An 9 aly 5 2 gt E 5 5 1 5 4 we D 5 E z 5 BEAD 12 r 2 t wis qnos E 1h r 1 rd E E1008 Y j En 14 DNC E E zh 5 P ZH ew gt 4 T er F E m 1 me _ FONDO a DEI Oren Rpke PRODUCD REV 00 FOND PCB REV 8238 277 1836 DocNo 150 057 03 25 HP L1940T Inverter Schematic 1 5 3 4 3 8 7 i 3810 E L 3 1 SEO ex 1 221020801 1 35 1 4 8 a P E 1 1 ous 1431 1834 En RIM d 2824 2807 X X 138 p Pr TEN Pe B germ Lamp VOLE w301 ni DBA TET 7 2 i 3 Cian I Nn L 2 3813 BOND DAVOS 3834 D REZ5
8. 1000 Pos am meaner wooTam HP L1940T 109 Pos omo _ WEYBOARDFORSUI 100 Pos 0 _ RSTSMOSJUMPMAXOROSR 1 000 pcs Le _ ___ 1000 HP L1940T CHIPR 10K OHM 5 1 16W PCS 56 HP L1940T CHIPR 1 5KOHM 5 1 16W CHIPR 2 2K OHM 5 1 16W CHIPR 2 2K OHM 5 1 16W sees atom ots can 100 amar tenes 57 HP L1940T CHIRP 4 7K OHM 5 1 10W Tev ov Puro NEN 17 HP L1940T n2 POS Lm umso Fos HP L1940T 2450 0650060347931 0603 50V4P7 25 1 000 PCS 2451 0656060347931 0603 500407 25 1 000 PCS SMD 10uf 20 16V PCS 60 HP L1940T 2435 067G 312100 3T SMD 10uf 20 16V 1 000 2435 067G 312100 3T SMD 10uf 20 16V 1 000 2437 067G 312100 3T SMD 10uf 20 16V 1 000 2437 067G 312100 3T SMD 10uf 20 16V 1 000 2437 067G 312100 3T SMD 10uf 20 16V 1 000 2439 067G 312100 3T SMD 10uf 20 16V 1 000 2616 067G 312100 3T SMD 10uf 20 16V 1 000 2616 067G 312100 3T SMD 10uf 20
9. 1024x768 75 VESA 1280x1024 amp T5Hz 1152x870 TSHz Apple lt Rik 4 Click Next bring up Fig 18 Hz ActivePixels AspectRatio Refresh Rate 60 123 gt 1 6 5 Click Next bring up Fig 19 41 Fig 17 Fig 18 HP L1940T Pixel Clock Active Flanking Active Blanking Synelffset dth Sync ffset eyncFlidth ImageSize ImageSize Border qu Border 0 855 35 0 4095 0 4095 0 4095 0 4095 0 1023 0 1023 63 0 63 0 4095 0 4095 255 0 255 TATA P2 c Stero Mode No stereo C Field stereo C Field stereo 2 way stereo C 2 way stereo right im left ima right im left ima C 4 way interleaved ster Side by Side stereo Sync Signal Analog Composite Syne C Bi Analog Composite Sy C Digital Composite Sync Digital Separate Sync Vsyne Positive v Hsync Positive HP L1940T Scan Mode Interlaced Non inter Fig 19 gt 1 0 6 mi 6 Click Next bring up Fig 20 In this step please confirm the Descriptor Data Type is Monitor Range Limits and all the items are same as below Descriptor Data Type Monitor Range Min Max Min Max Max Secondary GIF timing formula support Vertical Rate Vertical Rate
10. 1 T T 1 8 Di i a PGREEN 2 3 8 e t 4 Uta 3 1 LE 15 3454 4 52 7 gt ROBOT Guo i toT 3852 0 HL AN goz 2817 7 1 lei e 1 ig gig E 12 2603 8 1 1 08 3824 Ile DR 1 242210805831 LER Perri is 1 Moe WF lei WEMXHBF 5509 2 0 _______ ___ 972208 EXCEPT 1602 1603 2622 2824 7608 WERE CHIP COMPONENTS CHH Eco 5 Hudsend HPL 1740 CLASS MO USB CJ6B50 76 SUPERS 5 DATE 2004 10 01 9 10 11 7 8 9 10 24 KONINKLIJKE PHILIPS ELECTRONICS NV 2004 3138 158 6152 m 5 12 13 11 12 1111 4 135 05 126 U42 u 3 E12 144 Bii 45 1 146 Bii G5 D4 A11 010 154 E10 USB D2 usa Usa 2 ues F2 F2 F2 urd Fz ur 63 4 ura 64 urs urs B6 us2 05 48
11. Press the power button to turn on the monitor the power indicator will light up to Green HP L1940T 3 2 Control Buttons Power Indicator Green Power On mode Orange Power Saving mode Blank Power Off Mode Auto Adjust Activates the auto adjustment feature for optimum image Menu Opens the ON Screen Display OSD menu Minus 1 If OSD is on press to navigate backward through the OSD menu features and decrease adjustment levels 2 If OSD is off press to enable the DVI signal input available on select models plus 1 11 OSD is on press to navigate forward through the OSD menu features and increase adjustment levels 2 If OSD is off press to enable the VGA signal input Power Turns the monitor on or off 3 3 Adjust the Picture Main Menu Press the Menu button the Main Menu should be come on the screen of the monitor Main Menu Contrast Image Control Color Language Management OSD Control Information Factory Reset Exit HP L1940T Service Mode Press and hold the Menu button Power gt on Power then into the service mode Press menu button to bring to OSD menu for confirmation as below Main Menu Contrast Image Control Color Service Management OSD Control Factory Reset L Exit HP1740 V201A 050311 LG 17 Factory Mode 1 Turn off monitor 2 Push Auto Adjust and plus and hold them at the same time Press pow
12. 3223 3229 G3 3230 AT 3231 BT 3232 3233 3234 3235 3238 F5 3237 FS 3239 3240 H3 3241 A4 324r Bi 3243 4 3244 Bi 3245 816 3246 G4 324T 04 3248 Ed 3249 G5 3280 5 3231 5201 B4 5202 Fa 5203 8201 04 6202 Da 5204 D10 8204 EH 8205 6206 FB 6207 8208 Fi 6209 F10 8210 AT 8211 05 6212 8215 8218 8217 B8 6218 CE 8220 02 5221 04 8222 8223 7202 7202 6 7210 AS 001 5 1003 E2 2 1005 1006 1007 F2 011 ES 1084 104 1085 087 F2 igat F2 mig Ad Maz my cs 114 His Mig 4 Imi 410 1118 811 818 122 810 HP L1940T 12 13 4502 I2887 U24 B3 v 1303 C7 A 2301 B3 2302 BE 3301 SCALER BOARD 3302 D2 3305 A4 a SB 61101 x2 PB 61111 3308 B7 3308 BT B 3310 BE 3321 A4 3322 A4 3323 A4 3324 BS 3325 A5 3326 A5 3327 A5 3328 A5 C 3328 E4 3330 Ed 3331 4 3332 E5 L 3333 E5 3334 E5 3335 E5 3336 ES 3337 E5 D 3338 E3 3338 E2 3340 B7 5302 B2 L 7301 C3 7302 nua 8 1016 B2 319000131000 017 C2 E 1 18 22 131030 9 T z12211805668 021 Mas c2 1023 D2 EZ 318802131030 i025 026 B4 F 027 B4 028 029 0 031 032 033 C4 035 04 G 035 318802131030 1037 1E 1039 2122
13. CLASS JACK surera DSUB DVI CJ6B50 76 mare 8 8 FINE a AL 1743 I 1 12 xxi iv i B 3138 158 6152 Fi 11 42 10 11 1090 223876010949 ion IIA MIHE 15 Dir aiam 7390 HENTIE 223888714337 39907 7390 FRE az TT mA MM Nun Fea i agtn 2T98MTTA 13 e 112211505885 Tte 212211805811 oF 21221180558 E IKT anois 15 TIN ENTIS EAE pups gaa nears pr KONINKLLNE PHILIPS N V 2004 12 us B5 UIS FS UJS ES AS uis Bio 1201 1203 4 2201 0 2202 2203 019 2204 2205 2206 C5 2207 2208 2209 A5 221185 2212 85 2214 BS 2216 03 2217 2218 2218 F3 2220 G8 222164 2225 2226 2217 2228 ES 2223 2230 F5 2231 2232 2233 0 2234 2235 811 2238 C11 3201 F10 3202 AS 3203 5 3204 F10 3206 3207 4 3209 82 3210 EB 3211 1212 3216 3217 3218 B4 3219 B4 3221 ox 3222 XX 3223 F2 3224 F3 3225 F2 3228 F3 3227
14. mu wi am Wa m do um duo mE Wm E mas Bd ft de Be me sm a i Tee am de eS E LIII WO JE ehh ub im icky Pe Po i da Soe Aw Be 1 m 1 3 2 ES um EA p a Terre Jay ey 1 L 8 3 i mm m 5 sim Fig 30 4 Read EDID function to read DDC EDID data from monitor The EDID codes will display on screen as shown in Fig 30 Step 3 Modify DDC data verify EDID version week year Click new function icon from the tool bar bring up Step 1 of 9 as shown in Fig 31 EDID46 DDC application provides the function selection and text change select amp fill out from Step 1 to Step 9 i p ot version ro 1 Structure Varzion CU WED Vendor 13 hamnfacturer ber FID weber goed Froduet ID ID Fredect
15. button to bring up the OSD main menu 3 Press the Minus button to INFORMATION press the Menu button to confirm your selection 4 Confirm the Serial Number TWP318Q001 is updated as shown in Fig 42 Informe thon Current Settings 1200X1024 075 2 Recommended Settings 1280 10 1406017 Serial T WP3190001 Total Hours 8 Fig 42 Backlight Hours 5 Step 6 Save DDC data Sometimes you may need to save DDC data as a text file for using in other IC chip To save DDC data follow the steps below 50 HP L1940T 1 Click Save icon or click gt save as from the tool bar and give a file name as shown in Fig 46 The file type is EDIDA6 file ddc which can be open in WordPad By using WordPad the texts of DDC data amp table 128 bytes hex code can be modified If DDC TEXTS HEX Table ar completely correct it can be saved as ddc to re load it into DDC IC for DDC Data application Save AS 119404 gt L1940T digital THS D L1940T digital E RFO RAAN T Files dd Fig 43 2 Click Save Step 7 Exit DDC program Pull down the File menu and select Exit as shown in Fig 44 Eile I2C View Help New Open Save Ctrl S Save AS Print Ctrl P Print Previews Print Setup Fig 44 Recent File Step 8 Turn off the monitor exit the factory mode 91
16. 16V 1 000 2616 067G 312100 3T SMD 10uf 20 16V 1 000 2401 067G 312100 3T SMD 10uf 20 16V 1 000 2401 067G 312100 3T SMD 10uf 20 16V 1 000 2401 067G 312100 3T SMD 10uf 20 16V 1 000 2402 067G 312100 3T SMD 10uf 20 16V 1 000 2408 067G 312100 3T SMD 10uf 20 16V 1 000 2408 067G 312100 3T SMD 10uf 20 16V 1 000 2408 067G 312100 3T SMD 10uf 20 16V 1 000 2426 067G 312100 3T SMD 10uf 20 16V 1 000 2425 067G 312100 3T SMD 10uf 20 16V 1 000 2419 067G 312100 3T SMD 10uf 20 16V 1 000 2417 067G 312100 3T SMD 10uf 20 16V 1 000 2417 067G 312100 3T SMD 10uf 20 16V 1 000 2417 067G 312100 3T SMD 10uf 20 16V 1 000 2426 067G311F100 3T 10UF 16V 105 PANASONICV TYPE 1 000 2439 067G311F100 3T 10UF 16V 105 PANASONICV TYPE 1 000 2439 067G311F100 3T 10UF 16V 105 PANASONICV TYPE 1 000 2426 067G311F100 3T 10UF 16V 105 PANASONICV TYPE 1 000 2425 067G311F100 3T 10UF 16V 105 PANASONICV TYPE H 1 000 2425 067G311F100 3T 10UF 16V 105 PANASONICV TYPE H 1 000 2419 067G311F100 3T 10UF 16V 105 PANASONICV TYPE H 1 000 2402 067G311F100 3T 10UF 16V 105 PANASONICV TYPE H 1 000 2402 067G311F100 3T 10UF 16V 105 PANASONICV TYPE H 1 000 2516 067G311F100 4T ELCAPSM HV25V 10UPM20 R 1 000 2516 067G311F100 4T ELCAPSM HV25V 10UPM20 R 1 000 2460 067G311F100 4T ELCAPSM HV25V 100 20 1 000 2460 067G311F100 4T ELCAPSM HV25V 10UPM20 1 000 2503 067G311F470 4T ELCAP SM RVS 25V 47U PM20 R 1 000 2503 067G311F470 4T ELCAP SM RVS 25V 47U PM20 R 1 000
17. 2506 067G311F470 4T ELCAP SM RVS 25V 47U PM20 R 1 000 2506 067G311F470 4T ELCAP SM RVS 25V 47U PM20 R 1 000 POS 2509 067G311F470 4T ELCAP SM RVS 25V 47U PM20 R 1 000 2509 0676311470 ELCAP RVS 25V 470 20 1 000 HP L1940T RS 5 om 60 POS oma DOSGSMBARSPHSER 1000 POS DOSGSMBARSPHSER 1000 PCS ome DOSGSMBARSPHSER Pos DOSGSMBARS PHSER 1000 Pos me osssusnm mern res D HP L1940T HER Pos ear 2 mnsen res 7 1000 Pos HER Pos 1000 oosa smene Pos
18. ELECTRICAL SRST ES Lamp Current 000 Lamp Current 000 A Inverter Operating Frequency Rd 8 Inverter SUMIDA H05 5307 Optical Specifications 0 03 0 151 Color Chromaticity 0 209 0 0 ES ERES CS 1000T Wy Center Luminance of White Contrast Ratio White Variation Cross Talk u Horizontal Viewing Angle Vertical HP L1940T 6 Monitor Exploded View 14 HP L1940T 7 Repair Flow Chart Preparation make sure mains supply and video signal are well settled Power on Preparation dot alternation pattern or windows background HP L1940T Preparation before chassis debugging first check all wire harness remove intrusions and find errors by visual Chassis debug LED G OFF Check LED Check BC857C Yes Check resisters Check Solder Status Level 1 5 En HP L1940T NO Display Other Defects HP L1940T 8 Troubleshooting Screen is blank Power cord is disconnected Connect the power cord Power switch is turned Off Turn on the power Video cable is improperly connected Connect the video cableproperly Screen blanking utility is active Depress any key on the keyboard or moveThe mouse to inactivate the screen blanking Utility Image appears blurred indistinct Brightness and contrast are too low Press the Minus button on the monitor front panel to auto
19. Horizontal Monitor Range Limits 0 255 Hz 0 255 Hz 0 255 KHz Horizontal 0 255 KHz Supported Pixel Clock 0 TII gt E F F 00 gt Fig 20 7 Click Next bring up Fig 21 42 HP L1940T x Descriptor Data Type Monitor Hame Monitor Name hp 11940 Fig 21 8 Click Next bring up Fig 22 Click Finish to exit the Step window Serial number can be filled up at this moment for example TWP318Q001 NOTE You must modify the Serial NO In step 9 otherwise the Serial NO In OSD Couldn t be modified correctly Descriptor Data Type Moni tor S H ASCII Monitor S N ASCII 1 3189001 Fig 22 lt t so mi Step 5 Write DDC data 1 Configuration should be as Fig 23 And press OK 43 HP L1940T Configuration Setup E X DOC communication channel C DICZ3 Cancel 7 AOC command LLOTE Select RSPR Settings select COM Select Baud C AOC command 1045 LOSE Softvare DIC only 0 amp O C Serial Bamber Full Fa Fig 23 Factory nemory data write Mapped EIID page address Select Communication Method Del Monitor nust be enter factory n RZ 3 Monitor must not be enter factor EEPROM 24002 Usad 2 Access Factory Mode 1 Turn off monitor 2 Push Auto Adjust and plus and hold them at the same time Press
20. 054 1055 2 1058 3 1057 1058 04 1059 E4 W100 pried he the wetien consent of Ie copyright TATU Al Fee whole or in pats m Ae rechten Venega g gees ix rip dan mei machen ae Tere 26 ni beue rec I USB Ev n su 2817 SCALER BOARD SB 61101 61111 2 p c UM USB on T icons Y 5 8 8 8 pza PISA eidem 4 g 0 HP L1940T 11 12 1 12 K 3 nA wm avec Y uss DPFZ eA 560 5 1602 ga noana Maz DMF DR Av PS ee o pe i cer rr J Mm LLL 1 7 iA ANY OF Di Me USB p U peri 3020 T 2 WOMAN 25 0070 1 ge 5402 335 100 22 P s 12 1 1 DTO _ Di 1 2 4
21. Adjustment Approximately 30 minutes should be allowed for warm up before proceeding White Balance adjustment 1 How to do the Chroma 7120 MEM Channel setting A Reference to chroma 7120 user guide Use SC key and NEXT key to modify xyY value and use ID key to modify the TEXT description Following is the procedure to do white balance adjust 2 Setting the color temp You want A 9300 color 9300 color temp parameter is x 283 20 297 20 180 cd m B 6500K color 6500K color temp parameter is x 313 20 329 20 Y 180 C sRGB color sRGB color temp parameter is x 313220 y 329 20 Y 150 3 Into factory mode of HP L1940T Push Auto Adjust and plus and hold them at the same time Press power Power button untill comes out windows screen gt then release all button then press Menu button wait untill the OSD menu with Characters F come on the Screen of the monitor 4 Bias adjustment Set the to 0 Adjust the Brightness Ct to 90 5 Gain adjustment Move cursor to F and press MENU key A Adjus 9300k color temperature 1 Switch the Chroma 7120 to 9300k channel 2 The chroma 7120 will show 28320 297 20 Y 180 cd m 3 Switch the chroma 720 to RGB MODE with press MODE button to change 4 Adjust the RED of color 9300K on factory window until chroma 7120 indicator reached the value R 100 5 Adjust
22. REV 1 8238 277 18361 ol 20 009 rite Name REVIEWEDBY 4 9 ____ ______ ____ 28 10 3 Key Board All rights reserved Reproduction in whole or in parts Alle rechten voorbehouden Verveelvuldiging geheel of gedeeltelijk is niet toegestaan dan met schriftelijke toestemming van de auteursrechthebbende is prohibited without the written consent ofthe copyright Owner m ZZ im TO SCALER BOARD A 8932 BZXB4 C5V1 6933 E BZXBA C5y1 BzZXB4 C5V1 Control Board SB 61202 x 48 61212 1932 SKOGABED10 1833 SKOGABEO10 e ah 1934 SKOGABEDITO Ip E 1835 SKOGABEO1D 1938 10 8931 KAA 3528Y SGC SG R STAND FOR RESERVED ONLY ECO 002072 MAME Jacky Lee Stella Fann CHECK 1 EJ6B50 02 SUPERS DATE 2004 09 03 2 CONTROL BOARD 29 3138 158 6016 1931 C1 1932 A3 1933 B3 1934 C3 1935 C3 1936 D3 2901 B2 2902 B2 2903 C2 2904 D2 2905 D2 3933 B2 3934 C2 3935 C2 6931 D3 6932 1 6933 B1 6934 D1 2931 1 2932 F933 2934 01 935 1 F936 1 2937 01 932 2 933 2 934 C2 935 2 HP 19401 NY SETNAME SH4 Hudson4 HP_1940 2004 10 27 KONINKLIJKE PHILIPS ELECTRONICS 2004 4 5 6 z HP L1940T gt P
23. 00V 0 000 0 TOOYp Setup with blank to black Sync Inputs Separate Syncs Composite Sync on Hsyn Sync on Green Video Fig 15 Serration Vsync is Image Sire Display Transfer Max Image Size Hz x Vt 0 36 30 Transfer Characteristic Gamma 2 2 lt FF gt 2 Click Next bring up Fig 16 Step 3 of 9 DPMS and Color Characteristics xi Feature Support RGB chromaticity White point value Phosphor 0 000 v Stand by Red 64 Suspend Y fo ss x 3 asic display Monochrome gray scale disp Y jo 6 RGB color displ Blue X 0 15 Won RGB multicolor dis EJ ERS White X Default IV Std default color space Y 329 IV Preferred timing m GIF supported Fig 16 Click Next bring up Fig 1 7 40 Step 4 of 9 Established Timings x Established YESA one bit flags 720 400 88Hz 640 480 60Hz IBM 640x480 BTHz Apple 640x480 BT2Hz VESA 540x480 amp T5Hz 800x600 562 VESA 800x600 60Hz VESA 500x600 721 VESA 800 600 75Hz 832x624 75Hz Apple 1024x768 871 Interlaced 1024x768 G60Hz VESA 1024x768 TOHz
24. 1 XJ 5 8 H 1 TF 7 TE H 3 i 188 1 2 3 4 5 6 7 8 9 R STANDS FOR COMPONENTS RESERVED EXCEPT 15021503 2515 2518 5504 6501 WERE CHIP COMPONENTS CHN Eco SETHAME Husond HPL 1740 POWER CJ6B50 76 SUPERS J SCALER BOARD 3138 158 6152 SB 61101 2 NAME JACKY SANDY PB 61111 CHECK DATE 2004 10 01 OT oa T s 81768 17 m KONINKLUKE PHILIPS ELECTRONICS M V 2000 01 Ud AG 149 BE usn BY usd Ar 052 8 USE UTE AS UTT AG A1 UET 1502 1 1503 2501 A2 2502 A2 2503 2504 2505 B2 2506 B3 2507 2508 B2 2508 3 2510 2911 2512 AB 2513 BT 2514 BB 2515 B8 2516 Ad 2517 B4 2518 2518 AT 2520 A1 252102 2523 D2 2525 D2 2529 E2 2531 EZ 3501 A3 3502 AG 3503 A3 3504 A2 3505 C3 3506 C3 3507 03 3508 2 3510 02 3511 3512 E3 3513 AG 3514 BT 3515 BB 3516 BB 3517 AS 3518 3519 4 3520 3521 AT 3522 07 3523 07 3524 07 3525 03 3526 3527 03 3528 5501 A2 5502 B2 5503 B2 5504 13 5505 A1 6501 7501 D3 7502 7503 CT 7504 7505 AS 054 Di 2055 1 Fiss Di F059 01 064 2065 1 FOGG Fie 2068 A1 2069 1 FO70 1 F071 B1 072 B1 FO73 1 C1 1 Foro B1 00 A 009 010 B3 1943 1945 B3 c3 1050 03 051 3
25. 11805558 217211805589 ed E 1126 B7 1127 B7 H Al righi neared Reproduction in whole parts i amp prohibited vethout the written consent of the copyright Crater 1301 AN I NY Start 212211805663 1 I Hj 3 HH 1 ee R STANDS FOR COMPONENTS RESERVED EXCEPT 1303 7302 WERE CHIP COMPONENTS Hudsond HPL 1740 ROM CJ6B50 76 SUPERS 5 3138 158 6152 DATE 2004 10 01 KONINKLIJKE PHILIPS ELECTRONICS 2000 9 I 140 11 12 43 1 2 1 2 3 4 5 6 AS 8 9 10 11 12 13 33 amp m 2 LOS 3 4 2427 m hue weiter Gone o Fa nights erered Feprodaction in migis or in paris 5 89 1 aie rechten ecrbsheuden gehe I ee d n mel scien wan de L mura EN STANDS FOR COMPONENTS RESERVED EXCEPT 5411 5412 WERE CHIP COMPONENTS 1 SCALER BOARD A SB 61101 x2 PB 61111 5 Mn 2415 4 5 wig a 1208 3914 VIV ARA 1208 Moe
26. 2411 B2 2412 B3 2413 3 2414 B3 2415 23 2416 B3 2417 C2 2418 C2 2418 02 2420 02 2421 OF 2422 D2 2423 3 2424 D3 2425 E2 2426 E 2427 C2 2428 C2 2430 F2 2431 F2 2432 F2 2433 2434 2435 22 2436 F2 2437 G2 2438 G2 2439 2440 02 2441 G2 2442 G3 2443 G3 2444 2445 G3 2446 G3 2447 2450 2451 6 2452 B5 2453 B5 2454 25 2455 2480 F11 2481 211 3401 B5 3402 B5 3404 3405 C5 3406 C5 1407 C5 3408 D5 65 3410 E11 3411 F12 3412 B5 31365 M FS 3415 211 3416 FS 3417 F5 5401 AZ 402 B2 5403 C2 404 C2 5405 Du 5406 EZ 5407 F2 5408 2 5408 G2 5410 E11 5411 B2 5412 E11 7404 B7 7403 E2 7404 811 002 B11 003 811 811 005 811 2006 811 FOGE C11 C11 011 C11 C11 F013 C11 F014 C11 Fos 1 016 011 017 011 F018 811 21 011 F022 O14 023 11 024 E11 28 E11 026 E11 F027 F11 028 E12 1091 2 06898 G3 101 1102 G6 1103 1104 GE 1106 63 1109 HP L1940T ATR BL CONTROL 1 USB M a rs ar 7 7 3502 3803 mV 6 1 5 5 O 2 8 l 1 F 58 5 2 imm 5 22387BB15847 5 1 i E on 222270001101 3 F E 252271191022 212211505831 oF 212211B0583
27. 3 05 184 AI us 03 611 Usd 012 012 ua 012 012 usa 012 198 E12 196 E12 usa 06 1601 H4 1602 811 1803 Diz 2601 4 2602 AS 2803 AJ 2604 A3 2805 AJ 2606 Ad 2807 4 280B Ad 2608 C2 2810 2811 C2 2812 Cd 2615 82 2616 i817 1 2618 2 2619 FE 2620 HS 2621 2822 D10 2523 010 2824 E10 2825 E10 2828 BS 2827 E6 2630 8 3803 G4 3606 5 3607 BE 3808 3609 CS 3610 2 3811 05 3812 A2 3613 G3 3814 H4 3613 H4 3816 FG 3617 3818 2 3818 3620 3821 D 3622 3623 3824 5 3820 AB 3531 3832 B4 3833 AB 3634 B10 3835 C10 3636 B5 3642 BH 3645 8 3646 3848 CH 3650 011 3851 011 3852 E11 3853 F11 3854 C11 3855 E11 3656 Fii 3857 F11 5801 5852 6 5603 A3 5604 B2 5805 B11 5606 010 5807 E10 5808 5808 E11 7601 4 BE 7603 4 DT 069 1070 HP L1940T 10 2 Power Board include inverter and power AC DC Schematic nap r m TEM 160113 01 Kane 1 i jJ l 2 134 1601333 431206 71H 210880 1855101 Mime 3 CE cS I7 zi V a V Fa 119 B m i z LZ 5 g 1 EM 5 aia RM tut 3 Jon E eh n
28. Brightness 200 nits Contrast 450 1 LCD Panel Sync Type H V TTL Input H Frequency 30kHz 2 V Frequency 56Hz 76Hz Display Colors Over 16 million Colors Pixel Clock 140MHz Max Resolution 1280 x 1024 Plug amp Play DDC2B ON Mode Operating Temp 5 C to 35 C Storage Temp 20 C to 60 C Operating Humidity 2096 to 8096 Unpackaged W H D 413mm 477mm 265mm Main Dimensions Packaged W H D 524mm 513mm 239mm Weight N W Altitude Environmental Considerations HP L1940T 2 LCD Monitor Description The LCD Monitor will contain main board power board key board and which house the flat panel control logic brightness control logic and DDC The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage Monitor Block Diagram CCFT Drive Flat Panel and CCFL backlight Power Board Main Board RS232 Connector For white balance adjustment in factory mode Keyboard 110 240V Video signal DDC HOST Computer 3 Operation Instructions 3 1 General Instructions Press the power button to turn the monitor on or off The other control buttons are located at front of the panel By changing these settings the picture can be adjusted to your personal performance The power cord should be connected Connect the video cable from the monitor to the computer VGA card
29. Function Block Schematic 1100 14911501 21001610 160115 51 j 7 0 14209101 FLYBACK na 6 R41 wa 2100 100000 0 3 0 1 corm AL 9 4001 0n ET K1005W eK EM RNC iss 5 5 n 5 nn z 20 amp RNC 3169 BNC PGND PWM IC sm 1156 NC PRODUCD REV 00 REV 1 150805005 a o 9 jrieNme ____ REV DESCRIPTION APPROVED BY ASTOR LEE 27 HP L1940T Inverter Function Block Schematic TE INE ope Rik lie E m CIE Mio Canons y 20312 _ n R 1300803 Sy 4 Cable Tat ES E ND nomm MAT 1534 BIND PWM Seme L ora m 7 Bright Control bs ig 208 PWM PRODUCD REV 00 PCB
30. HILIPS 52 Sheet 130 please refer 3138 158 61521 D D 85 T 1 E IN NY F as 233 23 8 5 PIG G 55 T 225 H 1 ETMAME SH4 HUDSONA HPL 1740 1 0 SCALER BOARD CPT 86 2004 10 08 NAME TM Hsiao SUPERS 1 DATE 2004 10 01 S 5 wW 2 d 3138 158 61641 30 11 PCB Layout 11 1 Main Board um 1502 J QN ius 30 1 pt I 4 f 2 m 3 00000000 4 31 gm s JASVIN HP L1940T LY a hee 5 r 03 S406 5407 2408 54 945 34 na 2492 2888 HP L1940T 11 2 Inverter Power Board Om B j o 000000000000 ax 14 500079 32 HP L1940T 11 3 Key Board 33 HP L1940T 12 Maintainability Equipments and Tools Requirement 1 Multi meter Oscilloscope Pattern Generator DDC Tool with an IBM Compatible Computer Alignment Tool LCD Color Analyzer Service Manual N User Manual 34 HP L1940T 13 White Balance Luminance
31. HP L1940T SERVICE MANUAL 19 LCD Monitor L1940T Series THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES ERRORS OR OMISSIONS HP L1940T Table of Contents Table of Contents Revision List 1 Monitor Specification 2 LCD Monitor Description 3 Operation Instructions 3 1 General Instructions 3 2 Control Button 3 3 Adjusting The Picture 4 Input Output Specification 4 1 Input Signal Connector 4 2 Factory Preset Display Modes 4 3 Power Supply Requirements 5 Panel Specification 5 1 General Feature 5 2 Optical Characteristics 6 Monitor Exploded View 7 Repair Flow Chart 8 Trouble Shooting 9 Block Diagram 10 Schematic 10 1Main Board 10 2 Inverter Power Board 10 3 Key Board 11 PCB Layout 11 1 Main Board 11 2 Inverter Power Board 11 3 Key Board 12 Maintainability 13 White Balance Luminance Adjustment 14 Check List after replacing LCD Main board 14 1 Check white balance 14 2 Steps for writing DDC 15 EDID Content 16 BOM List HP L1940T Revision List Revision Date Revision History TPV Model Feb 24 06 Initial release T981KMVDBHHPNP HP L1940T 1 Monitor Specifications Driving system TFT Color LCD Pixel pitch 0 294 H 0 294mm V Viewing Angles Min TYP H 120 140 V 110 130
32. HP L1940T 15 EDID Content Analog 04 o5 06 07 os 10 Im 112 13 14 15 jo rr re rr rr er rr 9 22 ro 26 01 or or or 16 10 jor os ve 78 jos 54 40 26 32 oF 9 an er so er eo for jor Tor jor or or for or 48 Tor jor jor or or 90 joo 2a so 70 e io oo s o pe o o o oe os m m or as on m m o ro oo fos ac we m oe o o m m m o ro ma oo e w m ac om m o Digital 102 os o4 05 06 07 os 09 10 Im 13 14 15 jo rr re er rr er rr oo ro 26 01 or or or 16 jor os so z 78 eE fo 54 4 26 32 oF 9 an EF fso er eo for jor Tor jor for or for or 48 o jor jor or or or 90 za 98 joo 2a 4o so 7 64 113 joo 52 oe 11 o 9 foo 00 00 00 43 4 80 34 s fas s4 oa 20 20 oo rb o I 4c 1E Iso oe oo foa 20 20 20 20 o oo o Fo j jos se 20 20 20 o 52 HP L1940T 16 BOM List T981KMVDBHHPNP Location Fateor Description Quy Unit _____ GOMPOINDPNIET 05 Pos REARCOER FS mms 2 weise
33. O AU Panel PWR zd Reg a MOS EE 12V for LPL 12V 5V for CMO AU EEPROM 4 jaupd o4 40422uuo 6 10 Schematic 10 1 Main Board e 23 10 HP L1940T 10 11 11 12 1 12 3 B AS m n T DAE Rate _ p iH i 2 n i _ 4 5 11 A E 1 i i 3 Am L a 1 2 Hi wi 1201 Tae SCALER BOARD SB 61101 x2 61111 TON 5 5 st gt lt 1 RES 8 1 i 1058 i a 8 T P SUUM i 1008 Hr cart zu l n xd rri i Pe i 105 lie 1 4 gt R STANDS FOR COMPONENTS RESERVED 8 70 14 4 V VEN ce y ds 1 i V 5 au T boon acts BAV Ee DAVED EXCEPT 12301 1203 WERE CHIP COMPONENTS eco
34. RO QADDI HN 2 um a 1 4 x a 4 E Binali oip 1 EPOR NE 22 080880 3 Piver gt cine gt WaaWaaaal sigh RE 1 2821 A ETIKAN L 4 No sohn 6 re v ako Qr AUD 3417 10 2 1 Nu sin t 1 m Mu Era Cock Fel RS 0402351 VEE 7431 VOLE VOLT 7905 ov 3805 TEH mans i ET 3814 Baron 9 a 2313 2823 Cano cesorcens 5 CCP 1815 r n a LE BOND igi SGND ru VUE 5 qr D poe a Ton PANEL Rink oa 1 D COMP SEND 17 pen 3 RM EDS at lt r 2 7277257 3817 RE TET T 1834 UL D We zi 1812 Q1XT007 14 4 e m Rid TRO 0 0801 sand PRODUCD REV 00 PCB REV 8238 277 18361 DUDES T a Foxconn 3 SOND PREPARED BY ONY REVIEWED BY CLIFF CHAO ASTOR LEE SSS ____ REY 4 8 t I 26 HP L1940T AC DC
35. SRASE 3 BSSESSABSSSSSRSS 8 Basic Display Feat utes Video japut Vides D TO TERI Tithe Pianki fetup Tithe Fig 13 Spec 8 Barrabiss 4 Image 58 i 38 V image Die 10 Characteristic i 1 psi Feature Support Tarp itive OTT Tre Standard Coler Space Fr spare Preferirei Timing i timing hlock 1 E Step 3 Modify DDC data verify EDID version week year Click new function icon from the tool bar bring up Step 1 of 9 as shown in Fig 14 EDID4 6 DDC application provides the function selection and text change select amp fill out from Step 1 to Step 9 ID Manufacturer Name PID vendor assigned Product ID ID Product Code 2B2E Hex Dec Byte swap SHO 7 Serial Humber ID ID Serial Humber Hex Dec ASCII Unused Date Code Week of Manufacture 0 53 use 0 iff Year of Manufacture 1990 2053 Step 4 Modify DDC data Monitor Serial No 1 Click Next bring up Fig 15 39 HP L1940T Analog Signal Level Signal Level 0 TODV 0 300V 1 000 C 0 T14Y 0 286 1 000Vp 1 000V 0 400V 1 400 p v 0 7
36. adjust the screen If or too dark that Does not work press the Menu button to open the Basic OSD Menu and adjust the brightness and contrast scales as needed Image is not Centered Position may need Adjustment When OSD is inactive press minus button to auto adjust the screen image Press the Menu button to access the Advanced OSD menu Select Image Control Horizontal Position or Vertical Position to adjust the horizontal or vertical position of the image Check Video Cable is displayed Monitor video cable is disconnected Connect the 15 pin monitor video cable to the VGA connector on the computer on screen Be sure that the computer power is off while connecting the video Cable Input Signal Out of Range is refresh rate are set higher than what your Restart your computer and enter Windows displayed monitor supports Safe Mode by pressing the F6 Function on screen key when the computer starts to boot up Change your settings to a supported setting Restart your computer so that the new settings take effect HP L1940T 9 Block Diagram HP L1940T BLOCK FUNCTION EEPROM 4 Key Function USB 2 0 R G B CLK R G B ISPSCL SDA DDC Write enable R G B CLK lt ADDRO 17 Data 0 7 Flash 0 7 Bank ROM_OE WE Panel ID 06 RXOI RX OIH BL_EN Brightness 3 3V 1 8V 5V for CM
37. ed the value B 100 7 Repeat above procedure item 4 5 6 until chroma 7120 RGB value meet the tolerance 100 2 D Press reset key and Turn the Power button off to on to quit from factory mode 36 HP L1940T 14 Check List after replacing LCD Main board Check if white balance is within the specs after replacing Main board and panel then re writing DDC is necessary 14 1 Check white balance The white balance value for each common color temperature 9300 283 20 297 20 6500K 313 20 y 329 20 SRGB x 313 20 y 329 20 The color temperature value above must be up to the situation of x lt y The value of Y should be confirmed according to different customers 15 LCD is commonly 180 20cd cm Center and 17 LCD is required to be larger than 200cd cm Center The exact brightness values are confirmed by the checking regulations of different customers and different models 14 2 Steps for writing DDC Re programming Analog DDC IC Step 1 After initialize alignment box connecting all cables and box as shown in Fig 10 1 Power connector 2 D SUB connector n DC Power To printer port LTP1 To PC Video port D sub Step 2 Read DDC data from monitor 1 icon as shown in Fig 11 from the tool bar to bring up the Channels Configuration Setup windows as shown in Fig 11 37 HP L1940T de ajej Civis vie
38. er Power button untill comes out windows screen gt then release all button then press Menu button wait untill the OSD menu with Characters F below OSD menu come on the Screen of the monitor as bellow 3 Pust Menu to exit OSD menu Main Menu Contrast Image Control Color Language Management OSD Control Information Factory Reset Factory Mode Indicator Exit F HP L1940T Menu icons we sf image cons E s een 9 m Vera OSD Postion __ L a fee HP L1940T 4 Input Output Specification 4 1 Input Signal Connector Analog Connector Pinout aig Bonner Pau Pin Sina ____ memos Signal ____ ew ape GND Cable Detect Horizontal Sync I Tee sat 8 86 02 VGA connector layout HP L1940T DVI D Digital Connector Pins nemen sn Pn memoni Sn _ e oco e avs Nescio s ni moso DVI D Digital Connector Pins HP L1940T 4 2 Factory Preset Display Modes Pixel Horz Freq Horz Vert Pixel Clk
39. l N Open Ctrl O Save Save AS Ctrl P Print Preview Print Setup Fig 26 Step 8 Turn off the monitor exit the factory mode Re programming Digital DDC IC Step 1 After initialize alignment box connecting all cables and box as shown in Fig 27 45 HP L1940T 12DVI D connector 2 D sub connector 3 Power Plug DC Power To video card 2 To printer port LTP1 D sub cable Fig 27 Step 2 Read DDC data from monitor 1 Click icon as shown in Fig 11 from the tool bar to bring up the Channels Configuration Setup windows as shown in Fig 28 E a mx Click this button Fig 28 LE d gt m 8229 ue ere Jg c UNS ox 2 Select the DDC2Bi as the communication channel As shown in Fig 29 46 zum Pigs ur Til 408 21 4 q fastus me m Fig 29 3 Click OK button to confirm your selection HP L1940T BE SE Pe Leb 1 EE T qw Pu SS fool i int a Th lie Pu sm ae 55 m er ren PG qme i 5 dai ua wa da
40. m 106 Bade p e m parted 4 del awe 5 fice C Fiall starsi right ia m Field lali Rakin xm C right is D we F vleres lelt ias K senah Dea V 83 ar sg Compatita i 1 i ms CHE ita B Da Reach Rai 80 127 8 Bender p Verne Y Bae dar hn Fig 35 Fig 36 6 Click Next bring up Fig 37 In this step please confirm the Descriptor Data Type is Monitor Range Limits and all the items are same as below 7 Click Next bring up Fig 38 48 HP L1940T cripitor des Pescripter Typs Range Detcripter Data Type Dong end tor DT Min Vertical Rate _ Bam mA Nr m Bin 25 De Nerirsatal O 255 m 162 Seceudery timing rpari 8 Click bring up Fig 39 Click Finish to exit the Step window Serial number can be filled up at this moment for example TWP318Q001 NOTE You must modif
41. power Power button untill comes out Windows screen gt then release all button then press Menu button wait until the OSD menu with Characters F below OSD menu come on the Screen of the monitor see Fig 24 Mam Contrast Contra Language Fig 24 Maregenent i OSD Control Information Factory Hensel Factory Mode Indicator 3 Push Menu to exit OSD menu 4 cic Li Write EDID icon from the tool bar to write DDC data Then the screen will be black for 5 10 seconds when the screen recovers DDC data will be finished Writing Step 6 Save DDC data 44 HP L1940T Sometimes you may need to save DDC data as a text file for using in other IC chip To save DDC data follow the steps below 1 Save icon or click file gt save as from the tool bar and give a file name as shown in Fig 25 The file type is EDID46 file ddc which can be open in WordPad By using WordPad the texts of DDC data amp table 128 bytes hex code can be modified If DDC TEXTS amp HEX Table ar completely correct it can be saved as ddc flie to re load it into DDC IC for DDC Data application 3 bp 119401 gt 20 EM HP L1940T analog SHS ON HP 11940 analog RPA raw Files ad 7 Fig 25 2 Click Save Step 7 Exit DDC program Pull down the File menu and select Exit as shown in Fig 26 Eile View Help New Ctr
42. the GREEN of color 9300K on factory window until chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color 9300K on factory window until chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until chroma 7120 RGB value meet the tolerance 100 2 B Adjust 6500K color temperature 1 Switch the chroma 7120 to 6500K channel 35 HP L1940T 2 The chroma 7120 will show x 313 20 y 329 20 Y 180 cd m 3 Switch the chroma 7120 to RGB MODE with press button to change 4 Adjust the RED of color 6500K on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN of color 6500K on factory window until chroma 7120 indicator reached the value 0 6 Adjust the BLUE of color 6500K on factory window until chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until chroma 7120 RGB value meet the tolerance 100 2 C Adjust SRGB color temperature 1 Switch the chroma 7120 to SRGB channel 2 The chroma 7120 will show x 313 20 329 20 Y 150 cd m 3 Switch the chroma 7120 to RGB MODE with press button to change 4 Adjust the RED of color SRGB on factory window until chroma 7120 indicator reached the value R 100 5 Adjust the GREEN of color SRGB on factory window until chroma 7120 indicator reached the value G 100 6 Adjust the BLUE of color SRGB on factory window until chroma 7120 indicator reach
43. y the Serial NO In step 9 otherwise the Serial NO In OSD Couldn t be modified correctly fe Meni ter Sener Baseripisr Data Weiter 2 8 Gert ran Se fx falast sr 8458 ert pegs 0 Fer Tepe Mad Fig 39 Fig 40 Step 5 Write DDC data 1 Configuration should be as Fig 40 And press OK 2 Access Factory Mode 1 Turn off monitor 2 Push Auto Adjust plus and hold them at the same time Press power Power button untill comes out Windows screen gt then release all button then press Menu button wait until the OSD menu with Character F below OSD menu come on the Screen of the monitor see Fig 41 49 HP L1940T Main Menu Contrast Image Control Color Language Fig 41 Management OSD Control Information Factory Reset Exit 2 Factory Mode Indicator 3 Push Menu to exit OSD menu 3 Click Write EDID icon from the tool bar to write DDC data Then the screen will be black for 5 10 seconds when the screen recovers DDC data will be finished Writing 4 Confirm Serial Number in User Mode 1 Press the Power button to turn off the monitor Press the button again to turn on the monitor 2 Press the Menu
Download Pdf Manuals
Related Search