Page 1
Service Manual–U2520DB/ U2520DRB Version: 02 Date:2021/10/08
Page 2
Content Index 1. General Safety Instructions ....................................................................................... 3 1.1 SAFETY: General Safety .........................................
Page 3
1. General Safety Instructions Use the following safety guidelines to help ensure your own personal safety and to help protect your equipment and working environment from potential damage. NOTE: In th...
Page 4
When operating your equipment: Do not use your equipment in a wet environment, for example, near a bath tub, sink, or swimming pool or in a wet basement. Do not use AC powered equipment during an ...
Page 5
1.2 SAFETY: General Power Safety Observe the following guidelines when connecting your equipment to a power source: Check the voltage rating before you connect the equipment to an electrical outlet ...
Page 6
2. Exploded view diagram with list of items
Page 7
Item Description Q'ty Remark 1 Panel 1 2 ASSY MF 1 3 BTN PWR 1 4 SCRW TP-B FPH M2*2.4L ZN 4 5 PCBA CTRL BD 1 6 MYLAR CTRL BD 1 7 SCRW TP-B FPH M2*4L B-ZN 3 8 SCRW MACH FLATM3*0.5P*4.5L ZN 11 9 BOSS PA...
Page 8
3. Wiring connectivity diagram Wire 2 Wire 1 FFC 1 Wire 3 FFC 3 Wire 6 Wire 4 Wire 5 FFC 2
Page 9
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. Conn...
Page 10
Connecting/ disconnecting the USB Type-C cable and Power cable
Page 11
5. Disassembly and Assembly Procedures NOTE: This “Disassembly and Assembly Procedures” is for EMEA only, not for other regions. Please note that Dell will deem warranty void if any disassembly is don...
Page 12
2) Disassemble the Left/Right side 3) Disassemble the bottom side 4) Disassemble Rear Cover from middle frame. 1. Remove the tape which fixed USB FFC cable and USB wire on panel 2. Remove USB FFC cabl...
Page 13
1. Remove Sensor BD wire from I/F BD and Sensor BD 2. Remove Control BD wire from I/F BD 1. Remove 4 black tapes from Panel 2. Remove long and short backlight wire from LED Driver BD 1. Unlock screws ...
Page 14
1. Tear off the yellow tape from Panel and disassemble LVDS cable from Panel 2. Take off Main SHD from Panel 1. Take off Mylar from Philips-head SPS BD screwdriver Torsion of PCBA screw: 8.5±0.5Kg Tor...
Page 15
5.2 Assembly SOP Preparation before assemble 1. Clean the room for work 2. Identify the area for material 3. Prepare the implement, equipment, material as bellow: 1) Working table 2) Philips-head scre...
Page 16
1. Insert LVDS cable to panel and Philips- paste 1 yellow tape to fix it head screwdriver Torsion of FPH screw: 3.5-4.0kg 2. Place Main SHD on Panel and fix it with Middle Frame by 2 FPH screws (See G...
Page 17
3. Insert Control BD wire to I/F BD 4. Insert Sensor BD wire to I/F BD 1. Insert USB FFC cable and USB wire to I/F BD 2. Paste 1 tape to fix USB FFC cable and USB wire on panel 3. Assemble Rear Cover ...
Page 18
1. Lock 4 Rear Cover screws Philips- head screwdriver Torsion of Rear Cover screw: 11±1Kg Assemble the Stand: a. Insert the stand base blocks fully into the stand slot b. Lift the screw handle and tur...
Page 19
6. Trouble shooting instructions
