20 Most Recent Brother HL 7050 Laser Printer Questions & Answers

Check the electrical contacts on the tray. also, try cleaning the pickup roller with alcohol. the pickup roller may be out of position too. You can manually move it by hand. It should have the flat side parallel to the paper.

Error E52 is a Laser Motor Unit Fault. You can buy a new laser motor unit or try to fix it yourself.

Step-by-step instruction:

1 - Remove gently the top cover of the printer ( 4 screws - 2 on top/front + 2 in back/side). [Front screws are revealed by pulling open the front cover.]
2 - Be careful with the connectors going to the top LCD panel. You might want to disconnect the shorter one. [Do disconnect the shorter one.]
3 - Remove the laser unit located on top of the printer covered by a steel plate.

To do that:
1 - Unplug (pull) the white flat connector going to the left side of the laser unit.
2 - Unscrew the 3 screws keeping the laser unit in place.
3 - The lower/right screw also maintains in place the second connector going to the unit. Remove it and unplug (pull) the connector.
4 - Squeeze out the laser unit from under the wires (going back and up).
[If there is a wired cable that goes tightly over the unit, unscrew one screw holding the small circuit board in place.]

You now have the laser unit outside of the printer.
1 - Remove the steel plate of the laser unit. There is a plastic shutter that will come loose. Don't loose it and take note of its location in case you need to put it back.
2 - Unscrew the 4 screws maintaining the motor section and remove it. [This is not necessary. Leave the board in place.]
3 - There is a small piece of black plastic that maintains the top part of the motor unit (with the mirrors) on the left side of the board. Twist it and remove it. [Twist it 90 degrees is sufficient; no need to remove it.]
4 - Pull up the mirror part.
5 - Be careful during all that not to touch any of the mirrors or prism or whatever seems to conduct light. If you do, you can always clean with isopropyl alcohol or glasses solution. [Since you have to touch the mirror to lift it, I just cleaned it routinely with an alcohol prep pad after I replaced it.]
6 - Put some sewing machine oil on the shaft.
7 - Put everything back together.

Which sensor are you looking for? and why?

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It's just holding the button on the front while switching on the printer and let the lightsequence run till it stops. An advertisepage will roll out and all runs well.
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Here's the solution:

1. Turn on the printer. Wait for the data light to turn off.
2. Hold down the "Go" and "+" buttons until the LCD panel displays "RESET COMPONENT LIFE."
3. Use the "+" and "-" keys to select the drum unit and reset it.

Hope this helps!