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Dell S1909WNf, Service Manual

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1 

Service Manual Versions and Revision 

No. Version Release 

Date 

Revision 

1 

 

1.0 

 

2008/08/22 

 

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 S1909WNf Service Manual 

Summary of Contents for S1909WNf

Page 1: ...Service Manual 0 Service Manual LCD Monitor S1909WNf ...

Page 2: ...ease 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 S1909WNf Service Manual ...

Page 3: ...BLY BLOCK 22 3 ASSEMBLY BLOCK 23 CHAPTER 5 TEST AND ADJUSTMENT 24 1 FUNCTION KEY DEFINITIONS 24 2 OSD CONTROL 24 3 FACTORY MODE INTRODUCTION 26 4 BURN IN PATTERN 27 5 AUTO COLOR BALANCE AUTOMATICALLY CALIBRATE CHIP ADC PARAMETER BY USING CHIP INTERNAL DAC 27 6 UPLOAD FIRMWARE TO MCU VIA VGA CABLE 26 7 AFTER REPAIR TO ENSURE THE QUALITY YOU SHOULD DO THE FOLLOWING TEST AND ADJUSTMENT 27 CHAPTER 6 T...

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

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

Page 6: ...former Power MOSFET Photocoupler Inverter Transformer MOSFET 5V DC output Snubber Schottky 2 INL836 AC Input 90V 264V Brightness Control Feedback and OVP Lamp2 PWM Control IC LD7552B Rectifier Filter Circuit Snubber Schottky 12V DC output 24C02 Mstar TSUM1PEJ LF 2 I2C Flash LVDS for 2 Channels VGA Connector 5V 14 318MHz LM1117MPX 1 8 DVI 3 3V AP1117E33A I2C Brightness Control DVI Connector VGA LM1...

Page 7: ...SEN When ON OFF signal is off MOSFET Q1 will be closed then upper resister R22 give high signal to Q2 GATE pin and make IC Pin1 SST_CMP to GND so IC will shut down If giving a high signal to Q1 Q2 will be closed then Pin1 will be floating 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...

Page 8: ... and C21 as the snubber circuit will decrease the peak voltage on Q4 drain pole witch have bad effort for MOSFET safety area R18 and C22 have the same effect with R17 and C21 C8 and C27 will deeply decrease the voltage on Q4 drain pole The transformer T1 secondary winding leakage inductance and output capacitance C18 forms a lower pass filter which converts the square wave driving signal into a si...

Page 9: ...R4A C852 0 47uF X 2 R850 499K C851 222 Y 2 fig 5 CN850 is a connector for connecting AC Power F850 is a fuse to protect all the circuit AC Input voltage is from 90V to 264V R850 R851 and 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 da...

Page 10: ...s enough for starting up When U850 begins to work Pin8 of U850 will output square wave to drive Q850 and then the main current flow get to GND bypassing through T850 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 1 and Pin 2 with components of D852 R855 C855 and C849 will be supp...

Page 11: ... need a sampling circuit to accomplish this function At first use R871 R872 and R868 this divider circuit to sample 2 5V and comparing it to a reference voltage 2 5 so we will get a differential signal witch can control the current of I851 TL431 R860 C859 and C871 is frequency compensating circuit witch be able to control feedback loop speed rate R857 is else able to accomplish this function and i...

Page 12: ...s to U104 TSUM1PEJ LF 2 24 through CN104 2 U105 120 Voltage is defined as Minus Button Menu on front bezel connects to U105 TSUM1PEJ LF 2 121 through CN104 4 U105 121 Voltage is defined as Menu Button ENTER on front bezel connects to U105 TSUM1PEJ LF 2 121 through CN104 4 U104 121 Voltage is defined as ENTER LED Indicator on Front Bezel a When press button power U105 TSUM1PEJ LF 2 123 be send in l...

Page 13: ...egisters 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 U104 23 receives low pulse then TSUM1PEJ LF 2 U104 will be wake up and send control signals at 20 75pin to on CCFL and switch 5 0v to panel module at the same time U104 make the VGA DVI cable input signal...

Page 14: ...nnector Pin Assignment Pin Symbol Description 1 Line AC Line Vin 100 to 240 Vrms 50 60Hz 2 GND GND 3 Neutral AC Line Vin 100 to 240 Vrms 50 60Hz 7 Inner Connector Pin Assignment 7 1 CN103 Connect M B to Panel Pin Symbol Description 1 Panel_Vcc Panel power supply typ 5 0V 2 Panel_Vcc Panel power supply typ 5 0V 3 Panel_Vcc Panel power supply typ 5 0V 4 NC 5 NC Pin Symbol Pin Symbol Pin Symbol 1 Red...

Page 15: ...VDS signal of even channel clock 23 RXOC LVDS signal of even channel clock 24 GND_LVDS LVDS Ground 25 RXO2 LVDS signal of even channel 2 26 RXO2 LVDS signal of even channel 2 27 RXO1 LVDS signal of even channel 1 28 RXO1 LVDS signal of even channel 1 29 RXO0 LVDS signal of odd channel 0 30 RXO0 LVDS signal of odd channel 0 7 2 CN1 CN2 Connect to Panel Backlight Pin Symbol Description 1 HV High vol...

Page 16: ...Service Manual 15 8 Key Parts Pin Assignments 8 1U105 TSUM1PEJ LF 2 ...

Page 17: ...Service Manual 16 ...

Page 18: ...Service Manual 17 ...

Page 19: ...nsfer 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 I O To transfer commands addresses or data serially into the device input are latched on the rising edge of the serial clock 6 SCK I O To provide the timing of serial interface Commands addresses or input data are latched o...

Page 20: ...ply 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 O Gate drive output to drive the external MOSFET 8 4 U1 INL836 CCFL Inverter controller IC Pin Symbol I O Description 1 ENA_SST_CMP I Enable Soft Sta...

Page 21: ...R Bolt 4 40 12 5 Ni 509000001000R Identification NO Q t Designation NO Remark NO Designation Identification NO Q t Remark 502210100300R 714050014910R 501020220610R 701000007630R 502090310830R 505040208510R 1 1 MYLAR FOR AUO PANEL LE1979 PCBA I F BOARD W O SPK LE19D5 812 ROHS PCBA KEYPAD power key LED BOARD 501110500301R LOGO PLATE DELL Apollo 4 1 MYLAR FOR CHASSIS LE1979 505040208511R 1 OSD BUTTON...

Page 22: ...LE 1 P Cross W WAS M3 6 Zn Cc 2 BOLT 4 40 NI 4 Chassis 1 I F board 1 ower board 1 CHASSIS ASSY 1 STAND ASSY 1 kensington lock 1 BACK COVER ASSY 1 Back cover 1 Front bezel 1 logo plate 1 FRONT BEZEL ASSY 1 VESA COVER 1 LE1979 DISASSEMBLY BLOCK B Cross W WAS M3 8 Zn Cc 1 I Cross M3 6 Zn Cc 2 OSD BUTTON 1 OSD KEYPAD 1 MYLAR FOR CHASSIS 1 MYLAR FOR AUO PANEL Note 1 The arrows point out the direction o...

Page 23: ...pad board 1 Chassis 1 I F board 1 Power board 1 panel 1 CHASSIS ASSY 1 kensington lock 1 Back cover 1 front bezel 1 logo plate 1 FRONT BEZEL ASSY 1 EMI clip FINAL ASSY 1 Button_power 1 Screw P Cross T T 2 3 BLK B Cross W WAS M3 8 Zn Cc 1 I Cross M3 6 Zn Cc 2 VESA COVER 1 OSD keypad board 1 P Cross M4 10 BLACK NL 3 STAND ASSY 1 MYLAR FOR AUO PANEL MYLAR FOR CHASSIS 1 Note 1 The arrows point out the...

Page 24: ...s Minus to execute the Auto Adjust function 4 Enter When MENU OSD displays press these keys Enter the OSD sub menu 5 Power Power on or off the monitor Factory Modes Keys Function 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 standa...

Page 25: ...ut Brightness 75 Yes DCR off Yes Brightness Contrast 75 Yes Yes Auto Adjust Yes No RGB Input Color Format YPbPr Graphics Mode Selection Video Standard Multimedia Game Warm Cool Present Modes Custom R G B Color Settings Reset Color Settings Yes Yes Horizontal Position 50 Yes No Vertical Position 50 Yes No Sharpness 50 Yes Yes Pixel Clock 50 Yes No Phase Yes No Display Settings ResetDisplaySettings ...

Page 26: ...er Factory mode Fig 10 Fig9 Fig10 Back Exit from Factory mode and back to NO OSD Status Panel The current setting panel is highlighted Auto Color Automatically calibrate chip ADC parameters by using internal DAC Burn In Enable or disable the Burn in mode by choosing ON or OFF Reset Timer Reset the Turn on time of the panel to 0H0M Color Temp The R G B of Blue Preset 9300K Red Preset 5700K and Norm...

Page 27: ...hip internal DAC 5 1 If it is a new built set press Auto Color button on Factory menu 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 Ï buttons sim...

Page 28: ...e detailed reprogramming procedures will be described in ISP User s Guide 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 ...

Page 29: ...r at power saving mode Chroma Signal Generator VGA cable detector When select VGA model and VGA cable is not plugged out self test OSD will be floated Visual check Y measurement at default setting 1 Set brightness and contrast to default value 75 at 6500K 2 With full white pattern Y shall be 220 20 cd m2 Chroma Signal Generator and Color Analyzer OSD Lock Test Soft Lock When OSD is locked this ico...

Page 30: ...he digital circuit part z If you check the H V position please use the crosshatch pattern z This LCM support 10 timing modes if the input timing mode is out of specification Cannot Display this Video Mode will be displayed on the screen z If brightness uneven repairs Inverter circuit or change a new panel z If you find the vertical line or horizontal line lost on the screen please change panel z I...

Page 31: ...normal when power AC on Change U105 Yes Change U108 Is the keypad cable connective OK Reassembly or changing Yes Is theLED control signal at 123 of U105 high low convertible when DC on off NO NO Change Q107 Is the key function OK NO Press power key to DC on the monitor if display ok the process is end if no display see the no backlight process Yes Upgrade Firmware to Serial Flash U108 by VGA port ...

Page 32: ...separately when select VGA mode by OSD Do the Hsync Vsync Signals exist in R133 R134 Do the Hsync Vsync Signals exist in U105 32 33 Is the Q108 work normal Is theLED control signal at 124 of U105 high low convertible when DC on off END Insert VGA Cable correctly Check R133 R134 Change R115 R116 Change Q108 NO NO YES YES Change U105 NO NO NO YES YES YES ...

Page 33: ... when DC on off NO Yes Is the low active reset signal at 19 of IF Board U104 normal NO Change C160 Yes Is the serial clock signal at 6 of IF Board U105 normal when power AC Change U105 NO Upgrade Firmware to Serial Flash U105 by VGA port with ISP_Tool V4 100 exe after this process no the control signal yet change U104 Yes Change X101 Yes Is the voltage 12V at T1 PIN3 4 Check T850 D854 D855 NO Yes ...

Page 34: ...it or change U105 if yes Check Q101 circuit Check DC 5 0V on CN101 1 2 Are there data output on U105 91 100 77 86 Change U105 END Change D103 D104 D105 YES YES VGA YES NO NO NO IS the display is white and cannot display OSD when press key Yes Is the FFC cable inserting ok if no reinsert else change FFC cable No Is display selftest picture at VGA mode DVI NA Is there DVI signal in U104 39 40 42 4 4...

Page 35: ... A N CH TO220CFM APEC RoHS APEC 1 65 PI BD 491391400200R PCB P I 1 OSP CEM1 16 LE1979 A12 RoHS HSIANGKUO TATCHUN 14 412000686060R IC TSUM1PEJ LF 2 PQFP128 MSTAR Rohs MSTAR 1 45 412000494190R IC SST25LF020A 33 4C SAE SOIC8 SST ROHS SST 1 68 412000661620R IC MX25L2025MC 12G 8 SOP MXIC RoHS MXIC 0 65 412000494310R IC PM25LV020 100SCE SOIC8 PMC RoHS PMC 0 70 412000279480R IC AT24C04N 10SU 2 7 SOP8 4K ...

Page 36: ...D W O SPK SMT LE1979 A12 Ro 1 PC 30 629030022400R 10 PROGRAM W O SPK LE1979 A12 ROHS 1 PC 40 511130001200R A SOLDER BAR Sn96 5 Ag3 0 Cu0 5 Ni0 06 Ge0 TOMAS 3 2 G 50 506140005700R A LABEL BARCODE BLANK 33x7mm ROHS FOR PCB HENGMINGDA J IAYINMEI KAIDA 1 PC 20080807 ITEM P N Revision Description Supplier Usage Un Location 791821320A00R AA PCBA I F BOARD W O SPK MI LE1979 A12 RoH 10 430631080210R A WFR...

Page 37: ...P2305GN P CH SOT23 APEC RoHS APEC 1 PC Q101 120 410500075270R A XSTR AO3415 P CH SOT23 AOS RoHS AOS 0 PC 120 410060018380R A XSTR AM2321P T1 PF P CH SOT23 ANALOG POW AP 0 PC 130 410500045210R A XSTR PMBT3904 NPN 200MA 40V SOT23 PHILIP PHILIPS 2 PC Q104 Q103 130 410500045140R A XSTR MMBT3904LT1G NPN 200MA 40V SOT23 ON ON SEMI 0 PC 130 410500045090R A XSTR MMBT3904 NPN SOT 23 PANJIT RoHS PANJIT 0 PC...

Page 38: ...HS CATALYST 0 PC 360 412000494190R A IC SST25LF020A 33 4C SAE SOIC8 SST ROHS SST 1 PC U108 360 412000494310R A IC PM25LV020 100SCE SOIC8 PMC RoHS PMC 0 PC 360 412000661620R A IC MX25L2025MC 12G MXIC RoH MXIC 0 PC 370 411130962950R A ZENER 6 2V MMSZ5234B SOD 123 PANJIT RoH PANJIT 6 PC ZD102 ZD103 ZD104 ZD105 ZD106 ZD107 370 411121462950R A ZENER 6 2V BZT52 C6V2 SOD 123 WILLAS ROH WILLAS 0 PC 370 41...

Page 39: ...6 TAMURA 0 G E DELL S1909WN 18 5 E DELL S1909WN 18 5 E DELL S1909WN 18 5 2 Power board BOM ITEM P N Description Supplier Usage Location 791821400A00R PCBA P I BOARD W O SPK LE1979 A12 RoHS 10 430637020030R WFR 2P P 3 5mm 90 W LOCK RoHS CVILUX FCN FOXCONN 2 CN1 CN2 20 440149000410R SKT AC 10A 250V U C V H 2 0MM ROHS TECX 1 CN850 30 430300801650R HRN ASS Y 8P 130mm UL1007 24 AWG ROHS FOXCONN HEIGHTE...

Page 40: ... TDK WALSIN YAGEO 1 C12 70 419312720070R C SMD 0805 X7R 2700pF 50V K ROHS DARFON TDK WALSIN YAGEO 2 C19 C14 80 419342254670R C SMD 0805 Y5V 2 2uF 16V Z RoHS DARFON MURATA TAIYO TDK WALSIN YAGEO 1 C23 90 414908010250R RES SMD 0805 1KΩ J RT RoHS REV A TA I UNIOHM WALSIN YAGEO 2 R2 R6 100 414908113310R RES SMD 0805 113KΩ F RT RoHS TA I UNIOHM WALSIN YAGEO 1 R4 110 414908010550R RES SMD 0805 1MΩ J RT ...

Page 41: ...ITTELFUSE 0 90 491391400200R PCB P I 1 OSP CEM1 16 LE1979 A12 RoHS HSIANGKUO TATCHUN 1 100 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 7 5MM HOTRON YUANYE J1 J2 J3 J7 J8 J12 J1 100 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 7 5MM HOTRON YUANYE 0 110 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 17 5MM HOTRON YUANYE J4 J6 110 430405000000R JMPR ROLL KG D 0 6mm AT RoHS 17 5MM HOTRON YUANYE 0 120 4304050...

Page 42: ...2 D105 BAV99 1 3 2 ZD102 6V2 C131 NC GND WP_EDID 5 C123 NC C127 NC R131 100 C128 0 1 16V C117 NC RED 5 R128 4K7 R123 75 1 G HPD_DVI DVI_RXC DVI5V RX1 5 DVI_RX0 D209 BAV99 1 3 2 DVI_DET D210 BAV99 1 3 2 R203 10 R209 100 DVI_RXC D204 BAV99 1 3 2 U201 AT24C02BN 1 2 3 4 5 6 7 8 A0 A1 A2 GND SDA SCL WP VCC D203 BAV99 1 3 2 RX0 5 HPD_DVI RX2 5 VCC5V R219 4K7 DVI_RX2 D205 BAV99 1 3 2 GND DVI_SDA Lucky C2...

Page 43: ...232_TX DDCA_SCL RS232_RX DDCD_SDA DDCD_SCL NC AVDD_33 VDDP GPIO_P22 PWM1 GPIO_P23 PWM1 GPIO_P04 GPIO_P03 PWM3 GPIO_P00 SAR0 GPIO_P17 SAR0 GPIO_P01 SAR1 GPIO_P00 SAR1 GPIO_P02 SAR2 GPIO_P01 SAR2 GPIO_P06 GPIO_P07 NC NC NC I2C_MDA GPIO_P11 I2C_MCL GPIO_P10 RST GPIO_P15 GPIO_P16 VDDC VDDC VDDP VDDP GND GND GND LVA4M GPO 6 LVA4P GPO 7 BYPASS GPIO_P25 GPIO_P12 PWM3 VDDC VDDP NC GPIO_P25 NC GPIO_P43 AVD...

Page 44: ...ice Manual 43 power board schematic 1 2 Inverter board INL836 1 1 Contents LPL AUO PANEL 3 2 Reversion of History SHEET 1 REV1 1 3 Power board LD7552 Dell S1909WNf Power Inverter Schematic Diagram SCHEMATIC ...

Page 45: ...e Sheet of C873 1000pF 1KV X7R CN850 HF 301PCB 7MM 1 3 2 C847 1nF 50V X7R Signal_GND F850 3 15A 250V R841 499K D841 NC 1N4148 D850 BL4 06 3 1 2 4 R839 0 2R 1W FUSE D851 FR10 10 L855 NC CHK XXX CN853 SIP 8P 2 1 3 4 6 5 7 8 5V 5V GND GND DIM ENA Audio_detect Audio_on of f Signal_GND C846 NC 47pF 50V X7R L850 CHK 007 4 1 3 2 R852 499K D853 NC P6KE170A C860 332 Y1 C875 472P Signal_GND C854 68uF 450V C...

Page 46: ... 1500pF 50V X7R 0V Off Q3 2N3904 E B C C12 22nF 25V ZD4 BAV99 2 3 1 C24 NC 220pF 50V X7R C15 NC 220pF 50V X7R R7 1M R3 10K 5V C13 3pF 3KV R17 33R C25 open OVP Q2 RK7002 1 3 2 C23 2 2uF 16V R22 47K R18 33R C9 470uF 25V C27 1nF 50V R1 open R14 390R 1 R4 113K OVP C8 1nF 50V R5 10K 5V ZD5 BAV99 2 3 1 CCFL_ON OFF 5V C1 0 1 50V C18 15pF 3KV 2 CCFL NONE COM GND RA DELL S1909WNf inverter circuit A3 1 2 Sa...

Page 47: ...Service Manual 46 Attachment 3 PCB Layout power inverter bd power inverter bd Top Layer Bottom Layer ...

Page 48: ...Service Manual 47 I F board Top Layer ...

Page 49: ...Service Manual 48 Bottom Layer Power Keypad Top Layer ...

Page 50: ...Service Manual 49 Bottom Layer OSD Keypad ...

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