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Dell S1909WNf Service Manual

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Service Manual

Service Manual
LCD Monitor S1909WNf
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  Summary of Contents for Dell S1909WNf

  • Page 1: Service Manual

    Service Manual Service Manual LCD Monitor S1909WNf - 0 -...
  • Page 2 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: Table Of Contents

    Service Manual Table of Contents CHAPTER 1- PRECAUTIONS & SAFETY NOTICES ......................3 SAFETY PRECAUTIONS............................3 PRODUCT SAFETY NOTICE..........................3 SERVICE NOTES..............................3 CHAPTER 2- SERVICE TOOLS & EQUIPMENT REQUIRED ....................4 CHAPTER 3- CIRCUIT THEORY............................5 ..............................5 LOCK IAGRAM ..........................7 LECTRONIC IRCUIT HEORY FACTORY PRESET TIMING TABLE ........................13 ...........................13 OWER EQUENCY...
  • Page 4: Chapter 1- Precautions & Safety Notices

    Service Manual Chapter 1- PRECAUTIONS & SAFETY NOTICES SAFETY PRECAUTIONS This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However, improper used or installation may cause damage to the monitor as well as to the user.
  • Page 5: Chapter 2- Service Tools & Equipment Required

    Service Manual Chapter 2- SERVICE TOOLS & EQUIPMENT REQUIRED 1. SIGNAL GENERATOR 2. MULTIMETER 3. SCREW DRIVER 4. OSCILLOSCOPE 5. Soldering IRON 6. SOLDER (Lead free, RoHS compliance) 7. Color Analyzer 8. Fox_VISP_Programmer 9. Fox_VEDID_Programmer...
  • Page 6: Chapter 3- Circuit Theory

    Service Manual Chapter 3- CIRCUIT THEORY Block Diagram There are 2pcs PCBA in this monitor, one is power& inverter board which is a single layer board, one is interface board .The system function block diagram as below.This PWA is included switching power supplier, inverter for CCFL and interface board.(fig.1) Brightness Control ON/OFF Control...
  • Page 7: Electronic Circuit Theory

    Service Manual Electronic Circuit Theory 2.1 Inverter PWM circuit 2.1.1) Inverter Control circuit :( fig.2) +12V 2.2uF/16V 0.1/50V 3.3V Lightest Brightness 0V of lightest R3 10K 470uF/25V 0.1/50V open 1500pF/50V X7R 1500pF/50V X7R 1500pF/50V X7R 3.3V On open open CCFL_ON/OFF AP9971GD SST_CMP ISEN...
  • Page 8 Service Manual drive Q4, this push and pull the energy in the transformer. The voltage signal on negative pole of ZD4 sensed through R35 comes to Pin4 of U1, ISEN (Lamp Current Detection & Control). The CCFL current is detected through R14and reaches a regulated value.
  • Page 9 Service Manual 2.2 Power PWM circuit 2.2.1) Block diagram :( fig.4) Fig.4 2.2.2) AC Input and EMI Filter :( fig.5) L850 CHK-007 R851 499K R852 R850 499K 499K RT850 5R4A C852 0.47uF X 2 C850 C851 222 Y 2 222 Y 2 F850 3.15A 250V CN850...
  • Page 10 Service Manual 2.2.3) High Voltage to Low Voltage Control Circuit :( fig.6) D850 BL4-06 T850 R839 0.2R/1W FUSE SPW-119 C854 R841 R853 68uF/450V 499K C875 D853 NC/P6KE170A Signal_GND 472P R854 R842 499K R855 R843 D851 499K FR10-10 R856 D852 C849 C855 SF10-04 0.01uF/50V X7R...
  • Page 11 Service Manual C862 R862 L855 1000pF/1KV X7R 10R 2W NC/CHK-XXX D854 SR520 +12V D855 SR520 C863 C864 R887 470uF/25V 470uF/25V C873 R873 10R 2W 1000pF/1KV X7R D856 NC/SB5150 L854 CHK-XXX F851 D857 SB5150 5A/125V C858 C856 C857 C876 470uF/25V 470uF/25V 470uF/25V 0.1uF/50V CN853...
  • Page 12 Service Manual - U103 +3.3V is supplied by PC via CN102#9 with D106 and ZD102 for ESD protection, or supplied by Monitor self via D106. - U103 is an EEPROM IC which is memory and EDID data saved in it. 2.3.2 DVI CAPTURE(NA) - Differential Signal input RX0+,RX0-,RX1+,RX1-,RX2+,RX2-,RXC+,RXC- through CN102 #18,#17,#10,#9,#2,#1,#23,#24 via R130,R131,R132,R133,R134,R135,R137,R138 enter...
  • Page 13: Factory Preset Timing Table

    Service Manual 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 VESA 1024 x 768 60.023...
  • Page 14: D-Sub Connector Pin Assignment

    Service Manual Power supply for panel+5V V Signals Valid data (Digital RGB, HS, VS, DE, CLOCK) Power supply for backlight T1(ms) T2 (ms) T3 (ms) T4 (ms) T5 (ms) T6 (ms) T7(ms) SPEC (AUO) 0.5~10 0.0~50 >200 >200 0.5~50 >1000 SPEC (LPL) 0.5~10 0.01~50 >500...
  • Page 15 Service Manual GND_LVDS LVDS Ground RXE3+ LVDS signal of even channel 3(-) RXE3- LVDS signal of even channel 3(+) RXEC+ LVDS signal of even channel clock (+) RXEC- LVDS signal of even channel clock (-) RXE2+ LVDS signal of even channel 2(+) RXE2- LVDS signal of even channel 2(-) GND_LVDS...
  • Page 16: Key Parts Pin Assignments

    Service Manual 8. Key Parts Pin Assignments 8.1 U105(TSUM1PEJ-LF-2)
  • Page 17 Service Manual...
  • Page 18 Service Manual...
  • Page 19 Service Manual 8.2 U108 (Serial Flash) Symbol Description The device is enabled by a high to low transition on CE#. must remain low for the duration of any command sequence. To transfer commands, addresses, or data serially into the device. The write protect (WP#) pin is used to enable/disable BPL bit in the status register.
  • Page 20 Service Manual rising edge of the clock input, while output data is shifted out on the Falling edge of the clock input. HOLD To temporarily stop serial communication with SPI flash memory without resetting the device. To provide power supply. 8.3 U850 (LD7552, PWM Power Controller) Symbol Description...
  • Page 21: Chapter 4- Disassembly & Assembly

    Service Manual Chapter 4- Disassembly & Assembly 1. Exploded Diagram...
  • Page 22 Service Manual 2. S1909WN Disassembly Block Note: 1. The arrows point out the direction of disassembly.
  • Page 23: Assembly Block

    Service Manual 3. Assembly Block Chassis*1 Back cover*1 Power board*1 Note: 1. The arrows point out the direction of assembly...
  • Page 24: Chapter 5- Test And Adjustment

    Service Manual Chapter 5- TEST AND ADJUSTMENT 1. Function key Definitions POWER Every bottom function defining Power Switch with power LED indicator Power: On/Off, includes power indicator and Power ICON white- Active On Amber- DPMS OSD Controls 1. Menu: When OSD isn’t shown on screen, press [MENU] to enter OSD interface ,When OSD displays, press [MENU] to exit OSD 2.
  • Page 25: Osd Control

    Service Manual Hot Key Operation HOT KEY OPERATION FUNCTION DESCRIPTION MENU Plus Minus ENTER POWER Press [ ]& [MENU] at the same time, and then ● ● FACTORY MODE press [POWER] for DC power on. Press the key to enter factory menu Brightness&...
  • Page 26: Factory Mode Introduction

    Service Manual 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).
  • Page 27: Burn-In Pattern

    Service Manual Dell panel P/N LCD supplier Panel Supplier P/N Dell P/N 18.5”W M185XW01 T022G 18.5”W LM190WH1 W368G Burn-in pattern Burn-in pattern will self-generate automatically without VGA cable plugged in when the monitor set at Burn-in on mode and burn-in pattern will not be stopped until plugging in the VGA cable. Exit Burn-in mode method as followe: plugging in the VGA cable, press “Menu”...
  • Page 28: After Repair, To Ensure The Quality You Should Do The Following Test And Adjustment

    Service Manual Fig 11 The detailed reprogramming procedures will be described in ISP User's Guide. After repair, to ensure the quality you should do the following test and adjustment.
  • Page 29 Service Manual Item Content Equipment Test OSD 1.Signal is set as 1366x768@60Hz under General-1 Chroma 2. LCM button are from left to right, checking whether each function Signal Generator single function key and compound function key can be worked. Contrast Check 1. Set input mode to 1366x768@60Hz Chroma Signal Generator 2.
  • Page 30: Chapter 6- Trouble Shooting

    Service Manual Chapter 6- TROUBLE SHOOTING Common Acknowledge If you change the M/B, be sure that the U103 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 (U108) via VGA Cable.
  • Page 31 Service Manual Power (include IF +5Vand +3.3V) supply normal but LED off and no display Is the key function OK? Press power key to DC on the monitor,if display ok the process is end,if no display see the no backlight process Is the frequency 14.318MHz at Change crystal X101 #127#128 of IF Board U105?
  • Page 32 Service Manual Power (include IF +5Vand +3.3V) supply and display normal but LED Amber Is Power LED Amber? Do the Hsync. & Vsync. Signals exist Insert VGA Cable correctly in CN102 #13& #14 separately when select VGA mode by OSD? Do the Hsync.
  • Page 33: Backlight Can

    Service Manual 4. Power (include IF +5Vand +3.3V) supply normal, key function OK,but backlight can’t be turned on Backlight cannot be turned on,is the Is the CN853 on-off control signal come from IF ok? inserted CN103 OK? Is the on-off control signal #20 of U104 high-low convertible when DC on/off Is the frequency 14.318MHz at #32 Is the...
  • Page 34 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 IS the display is white and cannot Check DC 5.0V on Is the panel enable display OSD when press key? CN101#1, #2 signal at #73 of...
  • Page 35: At 32-Gray Scale Pattern, Color Lost In Some Scale

    6. At 32-gray scale pattern, color lost in some scale Color lost in some scale at 32-gray scale pattern Re-insert the FFC Cable Change FFC Cable Change U105 Chapter 7- RECOMMENDED PART LIST Dell S1909WN Critical Components List ontent Description Supplier Usage Leadtime(days) Capacity 412000628810R...
  • Page 36: Attachment 1- Bill Of Material

    Service Manual 412000330020R IC LD1117AL-1.8V-A SOT223(UTC) RoHS UTC, IC AS1117L-1.8/TR-LF,SOT223(A1 412000330830R SEMI)RoHS A1SEMI, 412000330070R IC AZ1117H-1.8 SOT223(AAC)RoHS BCD, 412000435481R IC AT24C02BN-SH-T 2K SOIC8(ATMEL)RoHS ATMEL, 412000480280R IC M24C02-RMN6TP SO8(ST)RoHS IC CAT24C02WI-TE13 412000480990R SOIC-8(CATALYST)RoHS CATALYST, 714030016330R Front Bezel assembly 714050014910R Back Cover assembly 701000007630R Chassis assembly 714020017000R...
  • Page 37 Service Manual...
  • Page 38 Service Manual 2.Power Key board BOM...
  • Page 39 Service Manual 3.OSD Key board BOM 2. Power board BOM...
  • Page 40 Service Manual...
  • Page 41 Service Manual...
  • Page 42: Attachment 2- Schematic

    1. R0603 package for Bead. C116,C117,C118 are reserved f or EMI or perf ormance issue. Document Number : SIZE : APPRO BY : 2. C131,C132 are reserved f or tuning performance issue. S1909WNf 18.5'' IF Board TITLE : CHECK BY : VGA-INPUT 2008-08-01...
  • Page 43 1.06V MENU 1.06V MSTAR_TSUM1PEJ InnoLux Document Number : SIZE : APPRO BY : MINUS 1.49V SELECT 1.49V S1909WNf 18.5'' IF Board Custom TITLE : CHECK BY : SCALAR 2008-08-01 DATE : DRAWN BY : Rev : Lucky SHEET CN101 U101...
  • Page 44 Service Manual power board schematic...
  • Page 45 Service Manual GN D VC C...
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  • Page 47: Attachment 3- Pcb Layout

    Service Manual Attachment 3- PCB Layout power/inverter bd: power/inverter bd: Top Layer Bottom Layer...
  • Page 48 Service Manual I/F board: Top Layer...
  • Page 49 Service Manual Bottom Layer Power Keypad Top Layer...
  • Page 50 Service Manual Bottom Layer OSD Keypad...