Dell U4320Q Simplified Service Manual Download Page 3 | Manualshive

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3. Wiring Connectivity Diagram

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AC In

Power Board

Panel

Function Key Board

TypeC

Down

USB3.0

Down3

DP 1.4 In

HDMI 2.0 In

Interface Board

Speaker

USB Board

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Summary of Contents for U4320Q

Page 1: ...ipment 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 NOTICE To avoid electrical shocks the products should be connected to an authorized power cord and turn off the master power switch each time before removing the AC power cord To prevent the product awa...

Page 2: ...2 Exploded view diagram with list of items Mid frame key board Speaker Panel Inter face board Power board Min bracket Rear cover Stand Usb board ...

Page 3: ...agram 2 n w o D 0 3 B S U 1 n w o D 0 3 B S U t u o o i d u A C e p y T n I 4 1 1 P D n I 0 2 1 I M D H AC In Power Board Panel Function Key Board TypeC Down USB3 0 Down3 DP 1 4 In HDMI 2 0 In Interface Board Speaker USB Board ...

Page 4: ... screws for unlocking mechanisms No 1 4 screw size M6x12 Torque 9 0 5kgfxcm 2 3 4 1 1 2 3 4 Lift the rear cover up carefully Disconnect the USB LVDS cable and function key cable from the connectors of the interface board and then remove the rear cover Use a Philips head screwdriver to remove 1pcs screw for unlocking the USB board unit then release the USB board unit and put it aside No 1 screw siz...

Page 5: ...ten 3pcs screws for locking the function key board with the front bezel No 1 3 Screw size M2x2 4 Torque 0 8 0 2kgfxcm Tear off acetate tape then disconnect the panel lamp cables from the connectors of the circuit board U se a Philips head screwdriver to remove 4pcs screws for locking the bracket chassis module with the panel No 1 4 Screw size M6x12 Torque 9 0 5kgfxcm Lift up the bracket chassis an...

Page 6: ...er board and interface board 9pcs No 1 screw size M4x8 Torque 6 0 5kgfxcm No 2 9 screw size M3x7 5 Torque 6 0 5kgfxcm Remove the circuit boards from the disconnect all of the cables bracket chassis module carefully and then Turn over the bracket chassis module Remove the Mylar from the hooks of the bracket and then use a Philips head screwdriver to remove screws for unlocking AC power outlet two N...

Page 7: ...ctor of the interface board then connect the power connective cable to the the interface board Turn over the interface board and locate it into the bracket Use a Philips head screwdriver to tighten 4pcs screws for locking the interface board No 6 9 screw size M3x7 5 Torque 6 0 5kgfxcm S3 7 9 2 1 Panel preparation Take out 1pcs panel module from the carton remove the protective film by tearing off ...

Page 8: ...ilips head screwdriver to tighten 4pcs screws for locking the bracket chassis module with the panel No 1 4 Screw size M6x12 Torque 9 0 5kgfxcm 2 3 4 1 Take 1pcs small bracket to assemble with T Con board then use a Philips head screwdriver to tighten 2pcs screws for locking the small bracket with T Con board No 1 2 Screw size M3x0 5x4 Torque 3 5kgfxcm S8 Move the bracket chassis module close to th...

Page 9: ...8 5 3 4 1 Take 1pcs USB board 1pcs conductive foam 1pcs LVDS cable and 1pcs rear cover Connect the LVDS cable to the connector of the USB board then paste 1pcs conductive foam on the back of the USB board and then locate the USB board into the correct position of the rear cover Use a Philips head screwdriver to tighten 1pcs screw for locking the USB unit with the rear cover No 1 screw size M3x6 To...

Page 10: ...d base then lift up the monitor to checking the gap between the front bezel with panel module then provide power supply and a video signal to the monitor then turn on the monitor for functionality check S18 S19 Use a Philips head screwdriver to tighten four screws for locking mechanisms Stick 1pcs label on the specific positions as the picture below shown No 1 4 screw size M6x12 Torque 9 0 5kgfxcm...

Page 11: ...he power LED remains white Also depending upon the selected input one of the dialogs shown below will continuously scroll through the screen Dell UltraSharp 43 Monitor The display will go into Standby Mode in 4 minutes No HDMI Cable www dell com support U4320Q U4320Q or Dell UltraSharp 43 Monitor The display will go into Standby Mode in 4 minutes No DP Cable www dell com support U4320Q U4320Q or D...

Page 12: ...pect the screen for abnormalities 5 Press Button 1 on the front panel again The color of the screen changes to red 6 Inspect the display for any abnormalities 7 Repeat steps 5 and 6 to inspect the display in green blue black white and text screens The test is complete when the text screen appears To exit press Button 1 again If you do not detect any screen abnormalities upon using the built in dia...

Page 13: ...High Data Speed 6 Use the or button to specify the preferred transfer priority 7 The setting will be effective after you turn on the PC PIP PBP Mode If your monitor does not display full screen or the resolution is not of the native resolution of the PIP PBP mode it could be due to the graphic card s behavior Please follow the steps below 1 Right Click in desktop and Select Display settings 2 Sele...

Page 14: ... no brightness Increase brightness and contrast controls via OSD Perform monitor self test feature check Check for bent or broken pins in the video cable connector Run the built in diagnostics Ensure that the correct input source is selected in the Input Source menu No video at HDMI DisplayPort USB Type C port When connected to some dongle docking device at the port there is no video when unplugin...

Page 15: ...n from a static image left on the monitor for a long period of time Faint shadow from the static image displayed appears on the screen Set the screen to turn off after a few minutes of screen idle time These can be adjusted in Windows Power Options or Mac Energy Saver setting Alternatively use a dynamically changing screensaver Product Specific Problems Problem What you experience Possible solutio...

Page 16: ... C interface of device cannot support DP alternate mode Set Windows to Projection mode Ensure that the USB Type C cable is not damaged No charging when using USB Type C connection to computer laptop and so on No charging Verify if the device can support one of 5 V 9 V 15 V 20 V charging profiles Verify if the Notebook requires a 65 W power adaptor If the Notebook requires a 65 W power adaptor it m...

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