Brother HL-1650 Error Codes

In fact the noise/E52 service problem might be easy to fix:

You just have to oil the mirror motor shaft in the laser unit.

Step-by-step instruction:

1 – Remove gently the top cover of the printer ( 4 screws – 2 on top/front + 2 in back/side).
2 – Be careful with the connectors going to the top LCD panel. You might want to 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).

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.
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.
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.
6 – Put some sewing machine oil on the shaft. Juuuust a little. I used machine oil SAE 20 or 40 (not sure – I didn’t look). WD40 would probably work also. Again, not too much – wipe the excess.
7 – Put everything back together.


That worked very well for me and my HL-1670n is back to his nice purring noise.

Good luck.