Brother HL-4040 Laser Printer -- Print Unable 6A Error

Print Unable 71 means Polygon Mirror Failure on the Brother HL-4040, MFC-9840 and MFC-9440.
Pretty safe to say it means the same thing on the MFC-8880.

The Polygon Mirror is part of the Laser Unit, and its rpm isn't within specs.
The Laser Unit must be replaced.

This is what is written in my service manual for Error Code A6:

Error code 6A
Print Unable 6A
Turn the power off and then back on again.
Fuser unit failure (The side thermistor does not detect 60degreesC within the specified time.)

Re boot the computer with ,( wired or wireless printer?), the printer cable in the USB port in the laptop/desktop, the windows version you have will ID the device and try to load a driver, or Go to printer in the start menu and ADD a PRINTER the software will search for the attached printer. OR use the software that came with the printer, load into the Dell and follow the instructions.

Several links with possibities:


http://www.fixya.com/support/t3704926-brother_mfc8640d_a6_error


https://www.justanswer.com/printers/5b111-brother-dcp-8040-showing-machine-error-6a-solu.html

https://www.manualslib.com/manual/549919/Brother-Dcp-8040-B-W-Laser-All-In-One.html?page=210

Quoting from manualslib.com:


6A (Heater does not reach 60°C within 11 sec.) Heater warming-up timeout error.

Thermistor ASSY • Halogen lamp

Sorry, this is a serious error and it means the PC board is toast. On mine, it gets to 22 on the counter (I assume it's a RAM integrity check) and then the LCD turns red and says "Print Unable 3B". When I called Brother they told me I needed a new PC board, which by the way is very hard to get to (you have to disassemble everything, then take apart the printer piece by piece). The price for the PC board is around $100 plus labor, so you're talking easily $200 to fix this.

Thanks Brother for making a self-destructing Lemon of a printer, the Brother HL-4040. And thanks for telling me I was on my own and to fix it a local repair shop.

Bad news. The laser diode responsible for printing black has up and died. You need a new Laser Unit, part number LR1461001. Brother has released a "Service Update" about this one; the instructions for replacing the laser unit run to nine pages. If you're within the 1-year warranty, it won't cost you, but it won't be printing with it today.

Most laser printers have an "S" paper path. They cannot help bending paper. I would suggest you print lables instead of envelopes if you send several letters. If you only send 1, hand address the envelope. Not elegant ut it works.

Probably a fatal error. Bad Laser Unit. Try unplugging the power cord for 10 seconds.