--- title: How to check the piezo board's voltage (Epsilon Series) description: In this Article you Will Learn how to Check the Voltage of the Piezo Board. --- [Skip to content](https://support.bcn3d.com/knowledge/voltage-piezo-board#main-content) English Show submenu for translations [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new?hsLang=en) [Customer portal](https://support.bcn3d.com/repair-service?hsLang=en) ![knowledge-base-header-bcn3d-logo.png\]](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Header/knowledge-base-header-bcn3d-logo.png?height=40&name=knowledge-base-header-bcn3d-logo.png) - [Default HubSpot Blog](https://blog.bcn3d.com/) Open main navigation Close main navigation - [Default HubSpot Blog](https://blog.bcn3d.com/) - English Show submenu for translations - [Contact support](https://support.bcn3d.com/knowledge/kb-tickets/new) - [Customer portal](https://support.bcn3d.com/repair-service) - [BCN3D forum](https://www.bcn3d.com/community/) [BCN3D forum](https://www.bcn3d.com/community/) Hello. 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[Troubleshooting](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#troubleshooting) # How to check the piezo board's voltage (Epsilon Series) ## In this Article you Will Learn how to Check the Voltage of the Piezo Board. | **Tools** |   | | --- | --- | | ![allen-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/allen-icon.png?width=21&name=allen-icon.png) | > Allen key 2 mm | | ![allen-2-icon](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Tools/allen-2-icon.png?width=16&name=allen-2-icon.png) | > Allen key 2.5 mm | \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ #### **1.** Turn off and unplug the printer. | ![bcn3d-epsilon-turn-off-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/General/bcn3d-epsilon-turn-off-1.png?width=335&height=270&name=bcn3d-epsilon-turn-off-1.png) | ![sigmax-turn-off-2](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Apagar%20impresora/sigmax-turn-off-2.png?width=372&height=300&name=sigmax-turn-off-2.png) | | --- | --- | #### **2.** Remove inner cover  - **Warning!** Be careful when handling the connection cover as the cables underneath may be damaged. - The piezo cable is extremely sensitive, use caution when handling it. ![cable-piezo-1](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Extruder%20board/cable-piezo-1.png?width=688&height=400&name=cable-piezo-1.png) #### **3. Check piezo board**  If your printer model has a clamp to hold the flat cable in place, remove the clamp so that the cable is loose as shown here: ![ffc-extruder-board-epsilon](https://support.bcn3d.com/hs-fs/hubfs/ffc-extruder-board-epsilon.png?width=685&height=385&name=ffc-extruder-board-epsilon.png) - Unscrews the board from the plate. There is no need to unplug the fan, piezo and hotend cables. ![extruder-board-piezo-connections](https://support.bcn3d.com/hs-fs/hubfs/Knowledge%20base/Sigma-Sigmax%20R19/Extruder%20board/Hotend.png?width=688&name=Hotend.png) - Carefully, turn the piezo board and check the voltage value. ![](https://support.bcn3d.com/hs-fs/hubfs/20230313_125238%20(1)-jpg.jpeg?width=422&height=361&name=20230313_125238%20(1)-jpg.jpeg) - Once you have the voltage, reassemble the components following the steps backwards. - [Omega](https://support.bcn3d.com/knowledge/omega?hsLang=en#main-content) - [Manuals & Downloads](https://support.bcn3d.com/knowledge/omega?hsLang=en#manuals-downloads) - [First steps](https://support.bcn3d.com/knowledge/omega?hsLang=en#first-steps) - [Maintenance](https://support.bcn3d.com/knowledge/omega?hsLang=en#maintenance) - [Tips](https://support.bcn3d.com/knowledge/omega?hsLang=en#tips) - [Troubleshooting](https://support.bcn3d.com/knowledge/omega?hsLang=en#troubleshooting) - [Epsilon Series](https://support.bcn3d.com/knowledge/epsilon-series?hsLang=en#main-content) - 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