How to reset to factory

It is written in it`s mannual you can find it in attached link Motorola MOTOTRBO XPR 7550 User Manual or here is the video tutorial as well which is not for the same model but could may helps you

It's possible to reset the DTXPRESS electronic drum kit to its factory default settings by performing a Factory Reset. Here's how you can do it:

Press and hold the [DRUM KIT] and [SAMPLE] buttons while turning on the power switch.
The display will show "FACTORY RESET OK?"
Press the [DRUM KIT] button to execute the factory reset.
The display will show "INITIALIZING" while the reset is being performed.
When the reset is complete, the display will show "COMPLETED".
Note: Performing a factory reset will delete all user kits, samples, and other custom settings that you have made. Be sure to save any custom kits or settings that you want to keep before performing the reset.

hi Linda.
How to factory reset the Galaxy S7

1. Swipe down from the top of the screen to pull down the Notification Shade.
2. Tap the Settings button. It looks like a gear.
3. Swipe up to scroll down on the settings screen.
4. Tap Backup and reset.
5. Tap Factory data reset. ...
6. Tap RESET DEVICE.
7. Tap ERASE EVERYTHING.

How to factory reset the Galaxy S7 ' Android Central

https://www.androidcentral.com/how-factory-reset-galaxy-s7
to read up more you could go to this link.
how to Factory resetting my Samsung Galaxy S7 Google Search

Use reset button.

I do not know what is your router type. Therefore I put here more options. Select what is valid for you:

• Linksys

Linksys Official Support Resetting your router and changing the router...

• TP-Link

How to reset TP LINK products to factory defaults

• Netgear

Restoring NETGEAR home router to the factory default settings Answer...

• Zyxel

wish to restore the factory settings for my Zyxel router
or
ZyXEL PK5001Z Factory Reset

• Asus

How to Reset the Asus RT N66R
or
How to Reset the Asus WL 500g

• D-Link

http://blog.dlink.com/what-is-a-reset-button-when-should-i-use-it
or
http://www.dlink.com/uk/en/support/faq/modems/dsl-modems/dsl-series/how-do-i-reset-my-adsl-router-back-to-factory-default-settings

• Belkin

Resetting the Belkin router to factory default settings using the Reset...

1)Go into your settings> Backup & Reset
2)Tap the factory data reset option and to through the reset of the steps to confirm the factory reset

Resetting the Printer to Factory Default

Settings

Resetting the printer to factory default settings can be useful when

you are troubleshooting with the printer.

CAUTION Resetting factory defaults clears the page buffer, removes downloaded

fonts and macros, and returns all print menu settings to factory defaults.

To reset the printer to factory default settings

1 Press MENU until RESETS MENU displays.

2 Press ITEM until RESTORE FACTORY SETTINGS displays.

3 Press SELECT until the following message appears:

RESTORING

FACTORY SETTINGS

This message displays until the printer has completed the
initialization

There are two types of resets that you can perform on nabi - forced reboot and factory reset. In the unlikely event that your nabi becomes unresponsive, you can easily perform a forced reboot. A factory reset is recommended when slow performance persists or if you want to wipe out all of your personal data and settings from nabi. Forced Reboot: To perform a forced reboot, hold the Power Button down until nabi turns off. When nabi is off, press the Power Button to turn on nabi again. Factory Reset: Caution! A factory reset is a very serious process because it will SYSTEMATICALLY WIPE ALL USER DATA from nabi. A factory reset will return nabi to its original factory settings.To perform a factory reset from Mommy/Daddy Mode, tap All Apps > Settings > Backup & reset > Factory data reset > Reset tablet > Erase everything. Please note: We highly recommend backing up your nabi prior to performing a factory reset. You can back up your music, videos, photos and apps with nabi™ Sync.

Performing a factory reset
Performing a factory reset erases all of your settings and account information and restores your
1 Press home to go to the Home screen. 2 Highlight settings , and then press select to display the Settings screen.
3 Highlight factory reset, and then press select .
4 To continue with the reset, select factory reset. To cancel the reset, select back.

• 5 When prompted, highlight yes to confirm that you want to reset your player, and then press
  select
  

The final solution is a factory reset of your router. You can do a factory reset by logging into the router using you browser. Go to the settings and perform a factory reset

If you forgot the router password, you ill have to do a factory reset by locating a small hold on the back of the router and insert the tip of of paper clip for about 10 seconds while the power is on. The router will be reset to out of box status and then you can set-up form scratch.