Dell U4323QE Service Manual Download | Manualshive

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Version: 01

Date: 2022/07/22

Service Manual - U4323QE

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Summary of Contents for U4323QE

Page 1: ...Version 01 Date 2022 07 22 Service Manual U4323QE ...

Page 2: ...re the possible existed improper repairing method may damage equipment or products It is recommended that service engineers should have repairing knowledge experience as well as appropriate product training per new model before performing the service procedures Qualified Repairability NOTICE To avoid electrical shocks the products should be connected to an authorized power cord and turn off the ma...

Page 3: ...xt to the country dropdown 1 Go to https www dell com support 4 Select the appropriate service or support link based on your need Item Description Q ty Remark 1 1 For EMEA Only not for other regions 2 1 1 3 4 1 1 5 6 Speaker 1 1 7 8 1 9 12 13 1 1 14 Power BD Panel Interface BD QAP 1 1 Stand Base ASSY See NOTE See NOTE See NOTE See NOTE USB_C Gen2 1 0 M cable A to C Power cable ASSY Middle Frame Se...

Page 4: ...3 Wiring Connectivity Diagram LED BD Speaker USB BD Interface board 43 inch LCD panel ...

Page 5: ...4 How to connect and disconnect power cable connectivity cable WARNING To change power cable connectivity cable switch off power before unplugging the cable and replugging in required cable ...

Page 6: ...4 How to connect and disconnect power cable connectivity cable ...

Page 7: ...side of the monitor to release the rear cover then use one hand to press the middle bezel the other hand to pull up carefully the rear cover in order of arrow preference for unlocking mechanisms of rear cover screws for unlocking mechanisms Use a Philips head screwdriver to remove 4pcs No 1 4 screw size M4x11 Torque 11 1kgfxcm 2 3 4 1 1 2 3 4 Lift the rear cover up carefully Disconnect the joystic...

Page 8: ... 5 0 5kgfxcm 3 2 1 Release the speakers cable to from the hooks of the middle frame then remove the speakers 1 2 7 8 9 13 14 15 3 4 5 6 10 11 12 21 20 19 18 17 16 22 23 24 25 26 28 27 Tear off 1pcs aluminum foil to release the bracket chassis Use a Philips head screwdriver to remove 28pcs screws for unlocking the middle frame with the panel module No 1 28 Screw size M3x0 5x4 Torque 5 0 5kgfxcm S7 ...

Page 9: ... Screw size M3x0 5x4 Torque 3 5kgfxcm Tear off 4pcs rubbers then use a Philips head screwdriver to remove 2pcs screws for unlocking the small bracket with T Con board then remove the small bracket then release the LED key cable by tearing off tapes on the back of the cable S13 Lift up the middle frame and put it into a fixture tear off the maylar tape for releasing the LED key board away from the ...

Page 10: ...t into the bracket Use a Philips head screwdriver to tighten 4pcs screws for locking the interface board S3 5 7 Panel preparation Take out 1pcs panel module from the carton remove the protective film by tearing off all the tapes of screen and four sides then examine the panel surface according to inspection criteria carefully S5 2 4 1 3 6 8 Take 1pcs Dell nameplate then use a locating fixture to f...

Page 11: ...e 4pc black rubbers on the T Con cover and panel as the picture below shown No 1 2 Screw size M3x0 5x4 Torque 3 5kgfxcm S8 Move the bracket chassis module close to the panel module then connect the LVDS cable to the connector of the T Con board then put the bracket on the back of the panel module S9 S10 S11 S12 S7 Assemble the middle frame with the panel unit then tear off 3pcs adhesive tape paper...

Page 12: ... LED cable USB connective cable and speaker s cable to the connectors of the board Use a Philips head screwdriver to tighten 7pcs screws for locking the two speakers with middle frame 1 3 2 No 1 4 screw size M3x4 Torque 3 5 0 5kgfxcm Locate the USB unit to the hooks of middle frame then use a Philips head screwdriver to tighten 4pcs screw for locking the USB unit with the middle frame S15 3 2 1 4 ...

Page 13: ...ule then provide power supply and a video signal to the monitor then turn on the monitor for functionality check S19 S20 S21 No 1 4 screw size M6x12 Torque 9 0 5kgfxcm Use a Philips head screwdriver to tighten four screws for locking mechanisms Paste 1pcs label on the specific positions as the picture below shown S18 2 3 4 1 Move the assembled rear cover close to the panel unit then connect the jo...

Page 14: ...computer To ensure proper Self test operation remove all digital and the analog cables from the back of computer 3 Turn on the monitor The oating dialog box should appear on screen against a black background if the monitor cannot sense a video signal and is working correctly While in self test mode the power LED remains white Also depending upon the selected input one of the dialogs shown below wi...

Page 15: ...Conditioning Firmware Reset Others Factory Reset Service Tag O 12T105 CN073K0 ENERGY STAR DDC CI On O Display Info Select Self Diagnostics Select T o Run the Built in diagnostics 1 Ensure that the screen is clean no dust particles on the surface of the screen 2 Select OSD items of Self Diagnostics in Others feature 3 Press the joystick button to start the diagnostics A gray screen is displayed 4 O...

Page 16: ...ent or broken pins in the video cable connector Run the built in diagnostics Ensure that the correct input source is selected in the menu Missing Pixels LCD screen has spots Cycle power on o Pixel that is permanently o is a natural defect that can occur in LCD technology For more information on Dell Monitor Quality and Pixel Policy see Dell Support site at https www dell com pixelguidelines Stuck ...

Page 17: ...r to the computer is connected properly and is secure Check for bent or broken pins in the video cable connector Wrong Color Picture color not good Try di erent Preset Modes in Color settings OSD Adjust R G B value under Custom Color in Color menu OSD Change the Input Color Format to RGB or YCbCr in the Color settings OSD Run the built in diagnostics Image retention from a static image left on the...

Page 18: ...ower saving mode by moving the mouse or pressing any key on the keyboard Check whether the signal cable is plugged in properly Connect the signal cable again if necessary Reset the computer or video player The picture does not ll the entire screen The picture cannot ll the height or width of the screen Due to di erent video formats aspect ratio of DVDs the monitor may display in full screen Run th...

Page 19: ... a 90 W power adaptor it may not charge with the USB C connection Ensure that you use only Dell approved adapter or the adapter that comes with the product Ensure that the USB C cable is not damaged Intermittent charging when using USB C connection to computer laptop and so on Intermittent charging Check if the maximum power consumption of device is over 90 W Ensure that you use only Dell approved...

Page 20: ...the Ethernet cable to con rm connectivity Re connect both ends of the Ethernet cable if the LED is not lit First power o the Computer and unplug the Type C cable and power cord of the monitor Then power on the computer plug in the monitor power cord and Type C cable Universal Serial Bus USB speci c problems Speci c symptoms What you experience Possible solutions USB interface is not working USB pe...

Page 21: ...m cable to your computer Reconnect the USB peripherals downstream connector Reboot the computer Wireless USB peripherals stop working when a USB 3 0 device is plugged in Wireless USB peripherals responding slowly or only working as the distance between itself and its receiver decreases Increase the distance between the USB 3 0 peripherals and the wireless USB receiver Position your wireless USB re...

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