BenQ E2400HD - 24" LCD Monitor Service Manual Download Page 49

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24” LCD Color Monitor BenQ E2400HD

(3) White screen

White Screen

Measure Q703 base
is low level?

X401 oscillate
waveform is normal

Check Correspondent
component.

Replace Panel

Check Correspondent component.

Replace X401

Check reset circuit of
U401 is normal

Check Q702, Q703 is broken

or CN701 solder?

Check U401

Replace U401

Summary of Contents for E2400HD - 24" LCD Monitor

Page 1: ...rsion 1st Date 07 08 2008 Notice For RO to input specific Legal Requirement in specific NS regarding to responsibility and liability statements Please check BenQ s eSupport web site http esupport benq...

Page 2: ...pecifications 8 5 2 Packing 9 Level 1 Cosmetic Appearance Alignment Service 9 Level 1 Cosmetic Appearance Alignment Service 10 Level 1 Cosmetic Appearance Alignment Service 11 Level 1 Cosmetic Appeara...

Page 3: ...Device DRAM Dynamic RAM DVI Digital Video Interface DVI I Digital Video Interface Integrated E EEPROM Electrically Erasable and Programmable Read Only Memory F FLASH FLASH memory G G TXT Green Teletex...

Page 4: ...G and B all colours Y C are ROM Read Only Memory S SDA Data signal on I2 C bus SDRAM Synchronous DRAM SW Sub Woofer Software T THD Total Harmonic Distortion V VGA Video Graphics Array Y YPbPr Componen...

Page 5: ...ce personnel who are familiar with this BenQ Product shall perform service or maintenance to it Before performing any maintenance or service the engineer MUST read the Important Safety Information 1 2...

Page 6: ...containing electrical components are sensitive to electrostatic discharge ESD Follow ESD safety procedures while handling these parts 8 Some products contain more than one battery Do not disassemble a...

Page 7: ...4 MICROPROCESSOR based Multi mode supported high resolution color LCD monitor This monitor can be directly connected to general 15 pin D sub VGA connector 24 pin DVI connector and 19 pin HDMI connecto...

Page 8: ...5 pin mini D sub cable H Frequency 30 83 kHz Multi frequency monitor Input V Frequency 50 76 Hz modes within these parameters Display Colors 16 7M Colors Image diagnostics Digital OSD Technology AUTO...

Page 9: ...CD Color Monitor BenQ E2400HD 9 5 2 Packing When packing the monitor into the carton please follow the pictures as below Using the EPE bag to pack the monitor without base Putting the base into the PE...

Page 10: ...24 LCD Color Monitor BenQ E2400HD 10 Using the EPS to pack the monitor Putting the base and user manual in the position as the picture shows above...

Page 11: ...24 LCD Color Monitor BenQ E2400HD 11 Putting the monitor and accessories into the carton Power cord Signal cable Audio cable...

Page 12: ...nitor should never be placed near or over a radiator or heat source or in a built in installation unless proper ventilation is provided Never push objects or spill liquid of any kind into this product...

Page 13: ...24 LCD Color Monitor BenQ E2400HD 13...

Page 14: ...24 LCD Color Monitor BenQ E2400HD 14...

Page 15: ...24 LCD Color Monitor BenQ E2400HD 15...

Page 16: ...24 LCD Color Monitor BenQ E2400HD 16 Click to complete the installation Note After installation you must restart the PC to take the setup to effect...

Page 17: ...LCD Color Monitor BenQ E2400HD 17 3 Connect the ISP board as follow 4 The process of ISP write is as follows a Double click running the program as follows Connect to the PC LPT Connect to the BenQ mod...

Page 18: ...24 LCD Color Monitor BenQ E2400HD 18 b Click icon running the program as follows c Click icon load the program E2400W TSUMU88EDI M240HW01 V0x 20080801_V027_B15B BIN...

Page 19: ...24 LCD Color Monitor BenQ E2400HD 19 d Click icon it will auto run If burn in success it will show as the follow picture...

Page 20: ...D On Screen Display menu to adjust all the settings on your monitor Press the MENU key to display the following main OSD menu There are four main OSD menus 1 Display 2 Picture 3 Picture Advanced 4 Aud...

Page 21: ...ptimizes and adjusts the screen settings automatically for you The AUTO key is a hot key for this function Press the ENTER key to select this option and make adjustment H Position Adjusts the horizont...

Page 22: ...he function is not available for use when Dynamic Contrast is on Press the key to increase the brightness and press the key to decrease the brightness 0 to 100 Contrast Adjusts the degree of differenc...

Page 23: ...the color tint of the image e g if you reduce the Blue level the image will gradually take on a yellowish tint If you reduce Green the image will become a magenta tint Press the or keys and the ENTER...

Page 24: ...Press the or keys to select PICTURE ADVANCED and then press the ENTER key to enter the menu 3 Press the or keys to move the highlight to a menu item and then press the ENTER key to select that item 4...

Page 25: ...he settings Standard Movie Dynamics Photo sRGB Display Mode This feature is provided to allow aspect ratio s other than 16 10 to be displayed without geometric distortion Full Scales the input image t...

Page 26: ...elect that item 4 Press the or keys to make adjustments or selections 5 To return to the previous menu press the MENU button Item Function Operation Range Volume Adjusts the audio volume Press the or...

Page 27: ...ut Selects the D sub analog or DVI digital input Use this to change the input to that appropriate to your video cable connection type Analog only models do not have the Input function Press the or key...

Page 28: ...ng accidentally changed When this function is activated the OSD controls and hotkey operations will be disabled Press the or keys to change the settings To unlock the OSD controls when the OSD is pres...

Page 29: ...elect loop Otherwise HDMI can only be selected by input select or by hot key Press the ENTER key to select this option Press the the or keys to change the settings ON OFF Reset All Resets all mode col...

Page 30: ...m the reset function The timer should record up to 99999 hours 7 Add one select item for HDCP DVI port Mode1 Mode2 at Service menu Mode1 To enable the hot plug pin detection HDMI port default Mode 2 T...

Page 31: ...24 LCD Color Monitor BenQ E2400HD 31 Level 2 Circuit Board and Standard Parts Replacement Product Exploded View Six angles view...

Page 32: ...id scratch and injury during the uninstall And then remove the four screws as below to remove the stand base ASS Y Fig1 2 Remove the rear cover Remove the rear cover as Fig2 The arrows in blue are the...

Page 33: ...e the Bezel Release the four screws marked in red as below to remove the bezel Remove the USB shield Fig 3 4 Remove the Panel Remove the 4 screws on the side of main frame first and then disconnect th...

Page 34: ...or Monitor BenQ E2400HD 34 5 Remove the Main Board and Power Board Remove the screws in red and disconnect the all connections at last you can get the Main Board and Power Board as follow POWER BOARD...

Page 35: ...1 D Sub Connector CN101 EEPROM U106 H sync V sync RGB VGA_SDA VGA_SCL LCD Interface CN403 Key Board Control CN401 Crystal 14 318MHz X401 EEPROM U107 DVI_SCL DVI_SDA Digital Video Data HDMI Connector C...

Page 36: ...dge Rectifier and Filter Start Circuit R904 R905 PWM Control IC Transformer Over Voltage Protect Rectifier Diodes AC input 5V 12V ON OFF Control PWM Control IC Feedback Circuit Output Circuit DC Conve...

Page 37: ...R711 10K 1 16W 5 R706 10K 1 16W 5 C705 0 1uF 16V C702 220uF 25V R707 10K 1 16W 5 C710 0 22uF R705 22K 1 16W 5 C714 0 1uF 16V R708 56K 1 16W 5 C709 0 1uF 16V R703 10K 1 16W 5 C707 100uF 25V Q702 AO340...

Page 38: ...5 R123 0R05 1 16W I O1 1 GND 2 I O2 3 I O3 4 VDD 5 I O4 6 U102 AZC099 04S 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 17 16 CN101 DB15 R128 0R05 1 16W ZD104 RLZ5 6B R126 0R05 1 16W C104 1000pF R125 0R05 1 16...

Page 39: ...3 2N3904S RTK PS KEY1 C432 0 1uF 16V C402 0 1uF 16V R442 3 9K OHM 1 16W R446 NC C410 0 1uF 16V R419 100R 1 16W 5 X401 14 3 Mhz C434 0 1uF 16V R431 10K 1 16W 5 R435 NC C418 0 1uF 16V C408 22uF 50V R441...

Page 40: ...NAME T P V Top Victory Electronics Co Ltd Key Component C A 5 8 Wednesday July 23 2008 715G3155 E 5 0 PANEL INTERFACE G3155 E X X 2 080723 RXE1 LVA1P RXO0 LVB0P LVA0P RXE0 RXE0 LVA0M C435 100uF 25V L...

Page 41: ...O4 6 U503 AZC099 04S R518 10K 1 16W 5 R504 0R05 1 16W R515 100R 1 16W 5 A0 1 A1 2 A2 3 VSS 4 SDA 5 SCL 6 WP 7 VCC 8 U504 M24C02 WMN6TP R505 0R05 1 16W Line 1 1 Line 2 2 VDD 3 Line 3 4 Line 4 5 NC 6 N...

Page 42: ...1B0 3 2A 4 GND 5 2S 10 VCC 11 1B1 12 1S 13 VCC 14 2B0 6 NC 7 2B1 9 NC 8 U603 FSA2257MTCX C619 1uF 10V DATA 2 BCK 1 LRCK 3 SCK 16 FMT 15 MUTE 14 DEMP 13 DGND 4 AGND 9 VOUTR 8 VCOM 10 NC 5 TEST 12 ZEROA...

Page 43: ...3 HEAT SINK Q901 R942 1K 1 10W 1 1 2 ZD921 MTZJ T 72 16B R914 0 33 OHM 5 D903 IN4148 1 2 HS1 NC 3 1 2 D905 BAV70 4 5 6 7 8 9 10 11 12 4 6 1 3 T901 POWER X FMR C939 1000uF 16V C930 0 1uF C911 1500PF2KV...

Page 44: ...1 8W R823 75K OHM 1 8W C820 NC 47pF 3KV C821 NC 47pF 3KV C822 NC 47pF 3KV C811 0 1uF R808 300 OHM 1 1 10W C805 0 047uF 1 2 ZD802 GDZJ5 6B R812 12K 1 8W 5 12V ON OFF R824 10K 1 8W 5 5V DIM 1 2 ZD803 GD...

Page 45: ...2008 715G3169 C 02 KEY BOARD G3169 C X X 1 0080508 MENU RIGHT CONNECTOR LEFT ENTER Power LED 3 4 2 1 6 5 SW005 SW 1 2 ZD005 UDZSNP5 6B AUTO GND GND 3 4 2 1 6 5 SW004 SW GND 3 4 2 1 6 5 SW003 SW GND 3...

Page 46: ...Q E2400HD 46 Troubleshooting Guide Equipments and Tools Requirement 1 Voltmeter 2 Oscilloscope 3 Pattern Generator 4 DDC Tool with and Compatible Computer 5 Alignment Tool 6 LCD Color Analyzer 7 Servi...

Page 47: ...rmal Please reinsert and make sure the AC of 100 240V is normal Reinsert or check the power section Check if X401 oscillate waveforms are normal Measure U701 Pin2 3 3V U702 Pin2 1 8V OK OK NG NG NG Re...

Page 48: ...e X401 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer or change the cable NG OK NG Check U401 Replace U401 Measure U701 Pin2 3...

Page 49: ...703 base is low level X401 oscillate waveform is normal Check Correspondent component Replace Panel Check Correspondent component OK OK Replace X401 NG NG NG NG Check reset circuit of U401 is normal O...

Page 50: ...05 Check bridge rectified circuit and F901 circuit Check start voltage for the pin8 of IC901 Check R904 R905 Change IC901 NG Check the auxiliary voltage is bigger than 10V and smaller than 20V 1 Check...

Page 51: ...F801 Check ON OFF signal Check Interface board or main board NG OK Check U801 PIN 11 5V NG OK Change ON OFF circuit Check U801 PIN8 PIN9 PWM wave NG OK Check U801 Check Q805 Q806 Drain wave NG Check t...

Page 52: ...D 52 Keypad Board OSD is unstable or not working Is Key Pad Board connecting normally Connect Key Pad Board Is Button Switch normally Replace Button Switch Y N N Is Key Pad Board normally Replace Key...

Page 53: ...24 LCD Color Monitor BenQ E2400HD 53 PCB LAYOUT Main Board...

Page 54: ...24 LCD Color Monitor BenQ E2400HD 54 Power Board...

Page 55: ...24 LCD Color Monitor BenQ E2400HD 55...

Page 56: ...20 M3 6 FOR ALL BOARDS MAIN FRAME 7 6 1 KGF CM 0M1G1740 10120 M4 10 FOR HINGE REAR COVER 4 12 2KGF CM 0Q1G 930 8120 Q3 8 FOR STAND BKT BEZEL 2 6 1KGF CM 0Q1G 930 8120 Q3 8 FOR POWER KEY BOARD BEZEL 2...

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