9” LCD Color Monitor BenQ G900WA Content Index 1. About This Manual......................................................................................................................................................... 2 2. Introduction................................................................................................................................................................... 3 2.1 RoHS requirement ....................................................................................
19” LCD Color Monitor BenQ G900WA 1. About This Manual This Service Manual is issued by engineer of TPV customer service according to the structure and capability of various models. The purpose of Service Manual is to provide a guide line to engineers to repair different models. The appearance and capability is introduced in this Service Manual. It is better for repair engineer to have a rough idea of this model through reading the Service Manual.
19” LCD Color Monitor BenQ G900WA 2. Introduction 2.1 RoHS requirement Overview -Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment (RoHS) Directive 2002/95/EC is published in the Official Journal 13 February 2003 (OJ L37, 13.2.2003, p.19). -Purpose: Reduction of the environmental and health risks posed by hazardous materials in EEE. -It is complementary to & running in parallel with the WEEE Directive. -Transposed into national law by 13 August 2004.
19” LCD Color Monitor BenQ G900WA 2.3 General Description This new LCD (Liquid Crystal Display) monitor BenQ G900WA offers numerous features and functions, for example: ● TFT display (Thin Film Transistor; active matrix) ● minimal space requirements thanks to slim casing ● optimum ergonomic characteristics (totally distortion-free, excellent picture definition and colour purity right into the corners) ● high degree of brightness and good contrast ● high resolution (1440 x 900) ● presentation of up to 16.
19” LCD Color Monitor • • BenQ G900WA The wall socket shall be installed near the equipment and shall be easily accessible. For use only with the attached power adapter (Output 12Vdc) which have UL,CSA listed license(Only for monitors with power adapter). Since the equipment is compatible with RoHS Directive, use components in which the use of specific chemically noxious substances is restricted; use only designated spare parts when it is necessary to replace such parts with new parts.
19” LCD Color Monitor BenQ G900WA 3. Product Overview 3.1 Monitor Specifications LCD Panel Input Driving system TFT Color LCD Size 48cm(19") Pixel pitch 0.285mm(H) × 0.285mm(V) Viewable angle 160, 160 (CR>10) Contrast 800:1 Brightness 300 cd/m2 Response time 5ms(typical) Video R, G, B Analog Interface Separate Sync. H/V TTL H-Frequency 31 - 83 kHz Multi- frequency monitor V-Frequency 55 - 76 Hz modes within these parameters Display Colors 16.7M Colors Max.
19” LCD Color Monitor BenQ G900WA 3.2 Input Signal Connector Pin No. Description Pin No. Description 1. Red 9. +5V 2. Green 10. Detect Cable 3. Blue 11. Ground 4. Ground 12. DDC-Serial Data 5. VGA_CON 13. H-Sync 6. R-Ground 14. V-Sync 7. G-Ground 15. DDC-Serial Clock 8. B-Ground 1 5 6 10 11 15 3.
19” LCD Color Monitor BenQ G900WA 3.4 Panel Specification M190A1-L07 OVERVIEW M190A1-L07 is a 19” wide TFT Liquid Crystal Display module with 4 CCFL Backlight unit and 30 pins 2ch-LVDS interface. This module supports 1440 x 900 WXGA+ mode and can display 16.7M colors. The inverter module for Backlight is not built in.
19” LCD Color Monitor BenQ G900WA Optical Characteristics 9
19” LCD Color Monitor BenQ G900WA LTM190M2-L31 OVERVIEW LTM190M2-L31 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT(Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit. The resolution of a 19.0” is 1440 x 900 and this model can display up to 16.7 millions colors.
19” LCD Color Monitor BenQ G900WA Electrical Characteristics 11
19” LCD Color Monitor BenQ G900WA Optical Characteristics 12
19” LCD Color Monitor BenQ G900WA 4 Disassembly /Assembly 4.
19” LCD Color Monitor BenQ G900WA 4.
19” LCD Color Monitor BenQ G900WA 4.3 Disassembly Note: Only the monitor G900W has both D-SUB and DVI connectors. The Monitor G900WA dose not have DVI Connector. 1). Back View as Fig1 Place the monitor face down on a smooth surface as Fig 1. Be careful to avoid scratch and injury during the uninstall. Fig1 2).Remove the STAND-BASE ASS'Y Remove the two screws in red to remove the STAND-BASE ASS'Y as Fig2. Fig2 3).
19” LCD Color Monitor BenQ G900WA The arrows in blue are the hook that we should put attention to when remove the rear cover. Use plastic putty knife to release the 6 hooks on the bottom,6 hooks on the top,5 hooks on the left,5 hooks on the right and remove the only one screw in red as Fig3 on the rear cover , then you can easily remove the rear cover and bezel.
19” LCD Color Monitor BenQ G900WA 4).Remove the Panel Remove the 4 screws on the side of main frame first, and then disconnect the Lamp Connections and LVDS Cable connection.
19” LCD Color Monitor BenQ G900WA 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.
” LCD Color Monitor 5. Cosmetic / Appearance / Alignment Service 5.1 Software/Firmware Upgrade Process Note: here we will take a AOC monitor for example.
19” LCD Color Monitor BenQ G900WA 3) Click the appears, please click the the option of “Both”, or select “Main”. icon, when the screen as shown below icon to load the software program.
19” LCD Color Monitor BenQ G900WA 4) Until appears the follow Fig, writer completed.
19” LCD Color Monitor BenQ G900WA 5.2 Adjustment / Alignment Procedure Adjusting the Picture You can use the OSD (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. System Use the (left) or (right) keys to highlight a menu item, and press the ENTER key to enter the Menu item settings.
19” LCD Color Monitor BenQ G900WA Display menu 1. Press the MENU key to display the main menu. 2. Press the (left) or (right) keys to select DISPLAY and then press the ENTER key to enter the menu. 3. Press the (left) or (right) keys to move the highlight to a menu item and then press the ENTER key to (left) or (right) keys to make adjustments or selections. select that item. 4. Press the 5. To return to the previous menu, press the MENU button. Item Auto Adjustment H.
19” LCD Color Monitor BenQ G900WA Picture menu 1. Press the MENU key to display the main menu. 2. Press the (left) or (right) keys to select PICTURE and then press the ENTER key to enter the menu. 3. Press the (left) or (right) keys to move the highlight to a menu item and then press the ENTER key to (left) or (right) keys to make adjustments or selections. select that item. 4. Press the 5. To return to the previous menu, press the MENU button.
19” LCD Color Monitor BenQ G900WA Color - Press ENTER to enter the Color menu. Normal Allows video and still photographs This is the factory default color. Bluish 0 to 100 to be viewed with natural coloring. Press the is factory pre-set to the PC industry 0 to 63 or standard white color. Reddish (left) Applies a cool tint to the image and (right) keys to select this option. Applies a warm tint to the image and is factory pre-set to the news print standard white color.
19” LCD Color Monitor BenQ G900WA Picture Advanced menu 1. Press the MENU key to display the main menu. 2. Press the (left) or (right) keys to select PICTURE ADVANCED and then press the ENTER key to enter (left) or (right) keys to move the highlight to a menu item and then press the ENTER key to (left) or (right) keys to make adjustments or selections. the menu. 3. Press the select that item. 4. Press the 5. To return to the previous menu, press the MENU button.
19” LCD Color Monitor Item BenQ G900WA Function Operation Range Selects a picture mode that best suits the type of images shown on the screen. • Standard - for basic PC application. Press the (left) • Movie - for viewing videos. Picture Mode • ON • Dynamics - for viewing or landscape-specific videos and playing (right) keys • OFF to change the games. settings. • Photo - for viewing still images.
19” LCD Color Monitor BenQ G900WA System menu 1. Press the MENU key to display the main menu. 2. Press the (left) or (right) keys to select SYSTEM and then press the ENTER key to enter the menu. 3. Press the (left) or (right) keys to move the highlight to a menu item and then press the ENTER key to (left) or (right) keys to make adjustments or selections. select that item. 4. Press the 5. To return to the previous menu, press the MENU button.
19” LCD Color Monitor BenQ G900WA region. Chinese • Serbo-Croatian • Romanian • Dutch • Russian • Swedish • Portuguese H. Position Adjusts the horizontal 0 to 100 position of the OSD menu. V. Position Adjusts the vertical position of the OSD menu. Press the (left) 0 to 100 • 5 Sec. or Display Time Adjusts the display (right) keys to change the settings. the OSD menu. • 10 Sec. • 15 Sec. • 20 Sec. • 25 Sec. • 30 Sec. Press the or (left) (right) keys to change the settings.
19” LCD Color Monitor BenQ G900WA be accessible. Press MENU to leave the OSD Settings menu. Press the ENTER key to select this Allows the monitor DDC/CI* option. Press the settings to be set through the software on the PC. • ON • OFF the (left) or (right) keys to change the settings. Information Displays the current Press the ENTER monitor property settings. key to select this option.
19” LCD Color Monitor BenQ G900WA 5.3 White-Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
19” LCD Color Monitor BenQ G900WA 5. Adjust the GREEN of color3 on factory window until chroma 7120 indicator reachedthe value G=100 6. Adjust the BLUE of color3 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 Bluish (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM.
19” LCD Color Monitor 6 Circuit Board and Standard Parts Replacement BenQ G900WA 6.
19” LCD Color Monitor BenQ G900WA Inverter/Power Board 5V Rectifier and Filter Transformer Bridge Rectifier and Filter EMI filter T901 14V Rectifier and Filter Start Circuit: R904，R932，R933 CN902 5V Over Voltage Protect PWM Control IC IC TEA1530 Feedback Circuit 14V ON/OFF Lamp Output Circuit Feedback Circuit MOSFET Q802、Q803 Transformer PWM Control IC TL494 Over Voltage Protect ON/OFF Control Q805/Q808 DIM Control 34
19” LCD Color Monitor BenQ G900WA 6.2 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. Service Manual. 8. User Manual.
19” LCD Color Monitor BenQ G900WA Main Board (1) No Power No power Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100-240 is normal OK NG Reinsert or check the power section Measure U201 Pin2=3.
19” LCD Color Monitor BenQ G900WA (2) No picture No picture Measure U201 PIN2=3.
19” LCD Color Monitor BenQ G900WA (3) White screen White Screen Measure Q602 base is low level? NG OK X401 oscillate waveform is normal NG OK Check Q602, Q601 is broken Replace X401 Check U401 or CN601 solder? OK NG Replace U401 NG Check Correspondent component. Check reset circuit of U501 is normal OK Replace Panel NG OK Replace U501 38 Check Correspondent component.
19” LCD Color Monitor BenQ G900WA Power/Inverter Board No power Check CN902 pin4, 5 = 14V NG Check AC line volt 110V or 220V OK NG Check AC input Check the voltage of C905(+) NG Check bridge rectified circuit and F901 circut OK Check start voltage for the pin8 of IC901 NG OK Check R904, R932, R933, and Change IC901 Check the auxiliary voltage is bigger than 10V and smaller than 20V NG 1) Check IC901 OK 2) Check R909,D901, C908…OVP circuit Check IC901 pin6 PWM wave OK NG 1)Check IC901 Check
19” LCD Color Monitor BenQ G900WA W / LED, No Backlight Check CN902 pin4, 5 = 14V NG OK Check the adapter and F801 Check ON/OFF signal and the pin 12 of IC801 is 14V NG Check main board or change ON/OFF signal OK Check the pin5 of IC801 have saw tooth wave NG Change IC801 OK Check the PWM wave from the pin9,10 of IC801 OK check IC801 Check Q802, Q803 PIN5, 6, 7, 8 have the NG output of square wave at short time.
19” LCD Color Monitor BenQ G900WA Keypad Board OSD is unstable or not working N Connect Key Pad Board Is Key Pad Board connecting normally? Y N Is Button Switch normally? Replace Button Switch Y N Is Key Pad Board normally? Replace Key Pad Board Y Check Main Board 41
19” LCD Color Monitor BenQ G900WA 6.
19” LCD Color Monitor BenQ G900WA 1) MCU initializes. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode. 9) Save the power key status into EPROM. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light.
19” LCD Color Monitor BenQ G900WA 6.4 BOM List T97MRDDBTWBQNN Location TPV Part No.
19” LCD Color Monitor BenQ G900WA CN202 033G3802 6 WAFER CN201 033G3802 9 WAFER 9P RIGHT ANELE PITCH CN601 033G8027 24 H CONN W TO B12P*2 P*2.0 4505-2 040G 457624 1B LABEL-CPU 040G 45762412B CBPC LABEL R507 061G152M339 64 CHIPR 3.
19” LCD Color Monitor BenQ G900WA R409 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R410 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R454 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R453 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R424 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R423 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R402 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R407 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R406 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R405 061G0402103 RST CHIPR 10 KOHM +-5
19” LCD Color Monitor BenQ G900WA R414 061G0402472 RST CHIPR 4.
19” LCD Color Monitor BenQ G900WA C310 065G0402509 31 CHIP 5PF 50V NPO FB201 071G 56K121 M CHIP BEAD FB502 071G 56K121 M CHIP BEAD FB503 071G 56K121 M CHIP BEAD FB601 071G 56K121 M CHIP BEAD FB301 071G 59K190 B 19 OHM BEAD FB302 071G 59K190 B 19 OHM BEAD FB303 071G 59K190 B 19 OHM BEAD D301 093G 64 33 DIO SIG SM BAV99 (PHSE)R D302 093G 64 33 DIO SIG SM BAV99 (PHSE)R D303 093G 64 33 DIO SIG SM BAV99 (PHSE)R D402 093G 64 42 PP BAV70 SOT-23 ZD301 093G 39S 34 T UDZS5.
19” LCD Color Monitor BenQ G900WA C008 065G0603104 32 CHIP 0.1UF 50V X7R C007 065G0603104 32 CHIP 0.1UF 50V X7R 715G2695 1 KEY BOARD PCB PWPC942HU2P POWER BOARD CN801 033G8021 2E F WAFER CN802 033G8021 2E F WAFER CN803 033G8021 2E F WAFER CN804 033G8021 2E F WAFER 040G 45762420A LABEL 25X6MM IC903 056G 139 3A PC123Y22FZOF NR901 061G 58080 WT 8 OHM NCT R908 061G152M104 64 100KOHM 5% 2W R914 061G152M228 64 0.22 OHM 5% 2W C903 063G 10747410V 0.
19” LCD Color Monitor BenQ G900WA AM1G1730 8120 GP SCREW 705G 193 93 01 D906 ASS'Y 093G 60218 SB10100FCT AM1G1730 8120 GP SCREW Q90G6274 2 HEAT SINK IC801 056G 379 22 IC TL494IDR SOIC-16 IC901 056G 379 71 IC TEA1530AT SO-8 PHILIPS Q811 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q807 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q806 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q801 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q812 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q804 057G 417 6 PMBS3906/PHILIPS-SMT(06)
19” LCD Color Monitor BenQ G900WA R813 061G0603100 2F RST CHIPR 10 KOHM +-1% 1/10W R808 061G0603100 2F RST CHIPR 10 KOHM +-1% 1/10W R803 061G0603105 RST CHIPR 1 MOHM +-5% 1/10W R835 061G0603105 RST CHIPR 1 MOHM +-5% 1/10W R862 061G0603105 RST CHIPR 1 MOHM +-5% 1/10W R851 061G0603150 2F RST CHIPR 15 KOHM +-1% 1/10W R924 061G0603152 RST CHIPR 1.5 KOHM +-5% 1/10W R930 061G0603240 1F RST CHIPR 2.4 KOHM +-1% 1/10W R811 061G0603240 1F RST CHIPR 2.
19” LCD Color Monitor BenQ G900WA R967 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR901 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR809 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR808 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR807 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR805 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR804 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR803 061G1206000 RST CHIPR 0 OHM +-5% 1/4W R910 061G1206100 RST CHIP 10R 1/4W 5% R909 061G1206100 RST CHIP 10R 1/4W 5% R918 061G1206101
19” LCD Color Monitor BenQ G900WA C910 065G0805102 32 CHIP 1000P 50VX7R 0805 C805 065G0805104 32 CHIP 0.1U 50V X7R C824 065G0805104 32 CHIP 0.1U 50V X7R C907 065G0805104 32 CHIP 0.1U 50V X7R C916 065G0805104 32 CHIP 0.1U 50V X7R C930 065G0805104 32 CHIP 0.1U 50V X7R C931 065G0805104 32 CHIP 0.1U 50V X7R C822 065G0805105 22 CHIP 1UF 25V X7R 0805 C928 065G0805122 31 CHIP CAP 0805 1200PF J 50V NPO C820 065G080522131G 220PF 50V NPO 2% C911 065G0805224 22 CAIP CAP 0.
19” LCD Color Monitor BenQ G900WA 715G2538 2 POWER BOARD PCB T901 006G 31502 1.5MM RIVET NR901 006G 31502 1.
19” LCD Color Monitor BenQ G900WA Diversity of T97SRDDBTWBQNN compared with T97MRDDBTWBQNN Location TPV Part No.
19” LCD Color Monitor BenQ G900WA R815 061G0603150 1F RST CHIPR 1.5 KOHM +-1% 1/10W R814 061G0603150 1F RST CHIPR 1.5 KOHM +-1% 1/10W R801 061G0603150 1F RST CHIPR 1.
19” LCD Color Monitor BenQ G900WA U401 056G1125701 X(WBQRWR9SRQ6) IC MCU RTD2120L-LF REALTEK R313 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R309 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R306 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R315 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R312 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R308 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R207 061G0402121 RST CHIP 120R 1/16W 5% R208 061G0402121 RST CHIP 120R 1/16W 5% LED001 081G 10 12 GP LED GP32052
19” LCD Color Monitor BenQ G900WA (4J.06K02.003)WARRANTY CARD FOR Q41G780088117A CHINA Q70G9002881 3A CD MANUAL(5B.0C401.
