> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/hardware-products/hardware/android-devices/t650-series/t650m/t650m-installation-guide/maintenance-and-cleaning.md). # Maintenance and Cleaning The T650m device has no user-maintainable parts. It can, however, be cleaned. ## General Care Your device is a product of superior design and craftsmanship and should be treated with care. The following suggestions will help you protect your warranty coverage. * Keep the device dry. Precipitation, humidity, and all types of liquids or moisture can contain minerals that will corrode electronic circuits. If your device gets wet, switch off the power, and allow the device to dry completely before replacing it. * Do not use or store the device in dusty and dirty areas. Its moving parts and electronic components can be damaged. * Do not store the device in hot areas. High temperatures can shorten the life of electronic devices, damage batteries, and warp or melt certain plastics. * Do not store the device in cold areas. It can form moisture inside the device and damage the electronic circuit boards when the device returns to its normal temperature. * Do not drop, knock, or shake the device. Rough handling can break internal circuit boards and fine mechanics. * Do not paint the device. Paint can clog the moving parts and prevent proper operation. * Keep the device free from any small and loose items (such as paper clips, staples, or coins) that could accidentally get inside it through an opening, such as the SAM slots or the primary smart card reader slot. * Do not attempt to open the device other than as instructed in this guide. This device has security features that protect it from tampering. For example, the file content will be deleted if the device's outer casing is opened. * Use only the power adapter that came with your device. Adapters of other electronic devices may look similar, but they may affect your device's performance or damage it. * Do not use this device in any area with a potentially explosive atmosphere. Follow all signs and instructions. The potentially explosive atmosphere includes areas where you would normally be advised to turn off your vehicle engine. Sparks in such areas could cause an explosion or fire resulting in bodily injury or even death. These suggestions apply equally to your device, or any of its attachments, or accessories. If your device is not working properly, then take it to the nearest authorized service facility for servicing or replacement. For your safety, have this device serviced only by a Verifone-authorized service provider. ## Additional Safety Information The following are additional safety information in using this device. ### Surface Cleaning To clean the device, use a slightly clean damped with water and a drop or two of mild soap. For stubborn stains, use alcohol or an alcohol-based cleaner. {% hint style="warning" %} **CAUTION** Never use thinner, trichloroethylene, or ketone-based solvents – they can deteriorate plastic or rubber parts. Do not spray cleaners or other solutions directly onto the device. {% endhint %} ### Smart Card Reader Cleaning The Smart Card Reader (SCR) must be cleaned regularly, as dirt accumulation can lead to SCR reading problems. SCR can be cleaned using commercially available card reader cleaning cards or using recommended Verifone cleaning card (PN 02746-02). #### Cleaning the SCR {% stepper %} {% step %} Inspect the device's SCR for the presence of foreign objects before cleaning the Customer Smart Card. * If the unit shows no presence of foreign objects, test the SCR function and record results. Proceed to Step 2. {% endstep %} {% step %} {% hint style="warning" %} **CAUTION** Send your device to a Verifone authorized repair center if foreign objects are found in the SCR at any time during SCR inspection, test diagnostics, or cleaning process. Removal of foreign objects from the SCR by customers may void the device warranty. {% endhint %} Clean the SCR with an approved or recommended Verifone cleaning card. It is always advised to use new cleaning cards every time. {% hint style="info" %} **NOTE** If using a commercially available cleaning card use ONLY an approved SCR cleaning card made specifically for POS SCR devices or Petroleum SCR. {% endhint %} {% endstep %} {% step %} Test the SCR after cleaning. * If SCR tests out okay as "passing", then the unit is ready for Customer Smart Card use. * If SCR tests out as "failing", then send the unit for repair. Provide details to repair center when SCR fails to test, either before cleaning OR after cleaning OR both before and after cleaning. {% endstep %} {% endstepper %} ### Magnetic Stripe Cleaning The Magnetic Stripe Reader (MSR) must be cleaned regularly (daily to once a week, depending on usage), as dirt accumulation can lead to MSR reading problems. MSR can be cleaned using commercially available card reader cleaning cards or using recommended Verifone cleaning card (PN 02746-02). {% hint style="info" %} **NOTE** If using a commercially available cleaning card use ONLY an approved MSR cleaning card made specifically for POS MSR Card reader devices or Petroleum MSR card readers. {% endhint %} --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.verifone.com/hardware-products/hardware/android-devices/t650-series/t650m/t650m-installation-guide/maintenance-and-cleaning.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.