
Brother printers are a widely used brand globally due to their multiple features, such as quality print-outs, ease of use, and user-friendly interface. However, users sometimes encounter an error message stating STACK COPIES 01 SLEEP, which indicates that the printer is in sleep mode or waiting for a print job to be completed. This issue can be resolved by checking the printer's sleep mode, clearing the print queue, or restarting the printer. Additionally, users may need to adjust the sleep mode settings or reset the printer memory to fix the issue.
| Characteristics | Values |
|---|---|
| What does "Stack Sleep" mean | Indicates that the printer is in sleep mode or waiting for a print job to be completed |
| How to wake the printer from sleep mode | Press any button on the control panel, such as the power button or cancel button |
| How to clear the print queue | Cancel or delete pending print jobs |
| How to adjust sleep mode settings | Press Menu, choose General Setup, Ecology, and Sleep Time. Use the dial pad to enter the number of minutes the machine is idle before it enters Sleep Mode |
| How to turn off sleep mode | Press the Start and Options keys simultaneously, then press the Up or Down arrow key to choose Off |
| What to do if the printer is in Deep Sleep mode | Reset the printer memory, access the printer's control panel, and select the Reset option in the menu |
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What You'll Learn

Troubleshooting the 'Stack Copies 01 Sleep' error
The error message "Stack Copies 01" and "Sleep" on a Brother printer indicates that the printer is in sleep mode or waiting for a print job to be completed. Here are some troubleshooting steps to resolve the issue:
Check the printer's sleep mode
Verify if the printer is in sleep mode. Press any button on the printer's control panel, such as the power button or the cancel button, to wake it up from sleep mode.
Clear the print queue
Ensure that there are no pending print jobs in the printer's queue. Open the Control Panel and click on "Hardware and Sound => Devices and Printers". Click on the Brother Printer Driver and open the print queue. Cancel all documents or specific print jobs. Once the print queue is cleared, the printer should return to its normal state.
Restart the printer
Turn off the printer, unplug it from the power source, and wait for a few seconds. Plug it back in, turn on the printer, and check if the issue persists.
Update the firmware
After resolving the issue, it is recommended to update the firmware for your Brother printer. This can help prevent future issues and improve the printer's performance.
Reinstall the printer software
If the issue persists, try reinstalling the printer software. Download the "Full Driver and Software Package" from the Brother website or use a compatible CD for your operating system. Install the software and attempt to print a document or test page to verify that the printer is working correctly.
Check network connectivity
If you experience repeated network connectivity loss, refer to the recommended settings provided by Brother to resolve the issue. Ensure that your firewall or security application is not blocking communication with your Brother printer.
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How to wake your Brother printer from sleep mode
The error message "STACK COPIES 01" and "SLEEP" on a Brother printer indicates that the printer is in sleep mode or waiting for a print job to be completed. Sleep mode is a low-power mode that the printer enters when it doesn't receive any jobs for a certain length of time. Deep Sleep mode is a similar state that uses even less power and cannot be disabled.
To wake your Brother printer from sleep mode, you can try the following methods:
- Press any button on the printer's control panel, such as the power button or the cancel button.
- Open and close the front cover where the toner is.
- Open the printer settings on your computer and send a print job.
- Change the WiFi connection to the correct network for your printer.
- Restart the printer by turning it off and unplugging it from the power source.
- Check the printer's sleep mode settings and adjust the SLEEP time to the highest value.
- Open the Printer Properties, click on the Ports tab, and add a new Standard TCP/IP Port with the Brother machine's IP address.
- Uninstall and reinstall the Brother software, and then attempt to print a document or test page.
If none of these methods work, you may need to contact Brother's customer support for further assistance.
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Adjusting your Brother printer's Sleep Mode settings
When your Brother printer is not receiving any jobs for a certain length of time, it automatically enters Sleep Mode. The length of time is based on your specific model and settings. You can adjust your Brother printer's Sleep Mode settings by following these steps:
- Open the Printers folder.
- Right-click on the Brother printer and left-click on Printing Preferences.
- In the Sleep Mode setting box, you can set the time-out value from 1 to 210 minutes in one-minute increments. The factory setting is 05 minutes.
- If you want to turn off Sleep Mode, double-click on the word "Sleep Time" on the right side of the screen. Click "Off" to disable Sleep Mode.
- After adjusting any settings, remember to save your changes as a preset.
If your Brother printer is displaying the error message "STACK COPIES 01" and "SLEEP", it is likely in Sleep Mode or waiting for a print job to be completed. To resolve this issue, you can try the following steps:
- Press any button on the printer's control panel, such as the power or cancel button, to wake the printer from Sleep Mode.
- Clear the print queue by cancelling or deleting any pending print jobs.
- Restart the printer by turning it off and unplugging it from the power source.
- If the issue persists, attempt to print a document or a test page. If it does not print, uninstall the Brother software and reinstall the MFL-Pro Suite using the "Full Driver and Software Package".
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How to resolve 'Stack Copies 01 Sleep' error on Brother Printer
The error message "Stack Copies 01" and "Sleep" on a Brother printer typically indicates that the printer is in sleep mode or waiting for a print job to be completed. Here are some troubleshooting steps you can take to resolve the issue:
Check the printer's sleep mode
Verify if the printer is in sleep mode by pressing any button on the printer's control panel, such as the power or cancel button. This should wake the printer up from sleep mode.
Clear the print queue
Ensure that there are no pending print jobs in the printer's queue. If there are, cancel or delete them to allow new print jobs to go through. You can do this by opening the Control Panel, clicking on Hardware and Sound, then Devices and Printers. Click on the Brother Printer Driver and open the print queue. To cancel all documents, click Printer => Cancel All Documents (or Purge Print Documents).
Restart the printer
Turn off the printer and unplug it from the power source. Wait for about 30 seconds and then plug it back in and turn it on again to see if the issue persists.
Update firmware
After troubleshooting, if the printer is still not working, it is recommended to update the firmware for your machine.
Reinstall the MFL-Pro Suite
If the issue persists, try reinstalling the MFL-Pro Suite using the "Full Driver and Software Package", which can be downloaded from the Brother website.
Check your network connection
If you experience repeated network connectivity loss, refer to the Brother support page for recommended settings to resolve this issue.
Contact Brother support
If none of the above solutions work, you may need to contact Brother support for further assistance.
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What does 'Sleep' mean on a Brother printer?
When a Brother printer is in Sleep mode, it reduces its power consumption by turning off the internal fuser. This results in a delay when printing or copying, as the fuser needs to warm up to its working temperature. The Sleep mode can be identified by the “Sleep” message on the LCD screen. If the printer is left idle in Sleep mode for a certain period, it will automatically enter Deep Sleep mode, which consumes even less power and cannot be disabled.
To exit Sleep mode, you can press any button on the printer's control panel, such as the power or cancel button. To adjust the Sleep mode settings, you can access the General Setup or General Settings menu, then navigate to the Ecology section and adjust the Sleep Time. Here, you can set the duration of idleness before the printer enters Sleep mode.
If your Brother printer is displaying an error message related to Sleep mode, such as "STACK COPIES 01 SLEEP," it may be due to a full printer memory or pending print jobs in the queue. To resolve this, you can reset the printer memory, clear the print queue, or restart the printer.
In some cases, issues with Sleep mode may require reinstalling the printer software or updating the firmware. If you are unable to print after the machine has entered Deep Sleep mode, you may need to add a new port with the Standard TCP/IP Port option and input the Brother machine's IP address.
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Frequently asked questions
"Stack Sleep" means that your Brother printer is in Sleep Mode and is either waiting for a print job to be completed or has not received any jobs for a certain length of time.
To wake your Brother printer from Sleep Mode, you can press any button on the printer's control panel, such as the power button or cancel button.
If your Brother printer is not printing even after waking it up from Sleep Mode, try the following steps:
- Clear the print queue by cancelling or deleting pending print jobs.
- Restart the printer by turning it off and unplugging it from the power source.
- Reset the printer memory by accessing the printer's control panel and choosing the printer settings.
To adjust your Brother printer's Sleep Mode settings, follow these steps:
- Press the Menu button and choose General Setup.
- Select Ecology and then Sleep Time.
- Enter the number of minutes the machine should remain idle before entering Sleep Mode.
If your Brother printer is in Deep Sleep mode, it means it has not received any jobs for a certain period and has entered a lower power state. Deep Sleep mode uses less power than Sleep mode and cannot be disabled.











































