How can we exit Sleep mode?

You can enter or leave the "Sleep mode" by tapping the Flex rapidly for 1-2 seconds. You'll feel a vibration and the LEDs will blink. (The blinks will depend on if you are entering or leaving sleep mode.) In this mode, the Fitbit Flex reduces the LED intensity and doesn't give alerts. Afterwards, it will provide some data about your sleep pattern - length, movement, waking up during the night. This can help you determine the quality of your sleep. (Note: it isn't a replacement for consulting a doctor if you always wake up tired.)

I hope this helps.

Cindy Wells
(You can manually enter your sleep and wake times into the app without using "Sleep mode". Then the app will use the movement data from the Flex to determine sleep quality. However, LED lights (primarily blue frequencies) are known to reduce sleep quality so dimming them helps most people sleep better. The alerts will also interrupt your sleep and reduce the quality.)

Sleep Mode
Setting the Sleep Mode reduces power consumption while the machine is idle.
You can choose how long the machine is idle (from 00 to 99 minutes) before it
drops into sleep mode. The timer automatically resets itself after the machine
receives a fax or PC data, or makes a copy. The default setting is 5 minutes.
1 Press Menu, 1, 8.
2 Use the Dial pad to enter the length of
time the machine is idle before it drops
into sleep mode (00 to 99 minutes), and then press Set.
3 Press Stop/Exit.

Setting the Sleep Mode reduces power consumption while the machine is idle.

You can choose how long the machine is idle (from 00 to 99 minutes) before it drops into sleep mode.

The timer automatically resets itself after the machine
receives a fax or PC data, or makes a copy. The default setting is 5 minutes.

1 Press Menu, 1, 8.
2 Use the Dial pad to enter the length of
time the machine is idle before it drops
into sleep mode (00 to 99 minutes), and then press Set.
3 Press Stop/Exit.

Sleep Mode
Setting the Sleep Mode reduces power consumption while the machine is idle.
You can choose how long the FAX/MFC is idle (from 00 to 99 minutes) before
it drops into sleep mode. The timer automatically resets itself after the machine
receives a fax or PC data or makes a copy. The default setting is 0 minutes.
1 Press Menu/Set, 1, 7.
2 Use the Dial pad to enter the length of
time the machine is idle before it drops into sleep mode (00 to 99 minutes),
and then press Menu/Set.
3 Press Stop/Exit.

click on the below link

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01647204&cc=us&lc=en&dlc=en&product=3795314

Press Menu 1,8
then set minutes to 00
press Stop/Exit

This should disable Sleep mode. Please post back with any questions or to rate this solution. Thank you very much.
Greg

Press Menu/Set, 1, 6, 2.
2 Use the dial pad to enter the length of
time the machine is idle before it goes
into sleep mode (00 to 99).
Press Menu/Set.
3 Press Stop/Exit.

i don't have the owners manual handy, but i'm quite sure you can disable the sleep mode by pressing a couples of buttons on control panel. that procedure is in your owners manual on the same page as setting sleep time.

hth,
razors

It should wake up if a fax is coming in or you send..

Press the Energy Saver Key

Your Brother machine#s Sleep Mode function reduces power consumption while the machine is idle. You can adjust how long your Brother machine is idle (between 00 and 99 minutes) before Sleep Mode is initiated. Please note that the default setting is 00 minutes, and the timer automatically resets itself after the Brother machine receives a fax,receives data from your PC, or makes a copy. To adjust your Brother machine#s Sleep Mode setting, please follow these steps:

1. Press MENU/SET, 1 (General Setup), 7 (Sleep Mode).

2. Use the dial pad to enter the amount of time the fax machine is idle before Sleep Mode is initiated (00 to 99 minutes).

3. Press the MENU/SET key to confirm your choice.

4. Press the STOP/EXIT key to exit the menu.

NOTE: If you frequently print, copy, or fax, set the idle time long
enough to insure that you will not always have to wait for the Brother machine to warm up.