iFixit - Answers With Device "Brother MFC-L3770CDW"

Brother MFC-L3770CDW: Replace touch panel unit

Wed, 10 Dec 2025 08:24:44 -0700

The touch screen of my printer became cracked after a box fell on it. For a month or two, things would still print from computer even though touch screen would not respond. Now the printer won’t turn on. Is it possible to buy a new touch panel and replace it at home without going through a retailer?

⟐ Commented December 10, 2025 at 8:24 MST

Brother MFC-L3770CDW: Copy has dark lines and splotches. How can I clean or eliminate these

Tue, 03 Jan 2023 06:50:07 -0700

Printer has dark lines and black splotches. How can I eliminate those and have a clear copy again?

Brother MFC-L3770CDW: Paper jam error will not clear

Wed, 05 Feb 2025 13:32:46 -0700

Paper jam error will not clear

⟐ Commented February 05, 2025 at 13:32 MST

Brother MFC-L3770CDW: Scan Area Adjustment - Off Center

Wed, 20 Dec 2023 09:22:58 -0700

I have a 3770 that has a problem with the scan area not being quite right. There appears to be padding on the left of the scan and a truncation on the right. I have found a document that appears to be published by Brother that outlines a Scan Area Fine Adjustment, but it does not seem to offer enough adjustment.

The same document goes into advanced repair and replacement procedures too but they aren't quite iFixit clear to understand.

Trying to find support through google or any other search engine is DOMINATED by brother for multiple pages so anyone else having this issue has no voice and we are prevented from helping each other.

My guess is that if I were to open the system up and bend the scan area or even add a shim to some part of the assembly, the whole thing would end up being absolutely perfect.

The document I'm referencing is the Brother Laser MFC SERVICE MANUAL and it covers:

DCP-9030CDN/L3510CDW/L3517CDW

DCP-L3550CDW/L3551CDW

HL-L3290CDW

MFC-9150CDN/9350CDW

MFC-L3710CW/L3730CDN/L3735CDN

MFC-L3745CDW/L3750CDW/L3770CDW

If anyone else is having scan area issues with this printer I'd be really keen to find out if they're the same issue I'm having or if this is the primary reason they ALWAYS seem to be available through Brother Refurbished.

Brother MFC-L3770CDW: How can I clear Printer Unable 02

Fri, 16 Dec 2022 07:31:38 -0700

How can I clear "Printer Unable 02"? I've tried shutting down, unplugging and restarting. I've even let the printer remain unplugged for 30 hours before plugging back in. No change; the error still shows up. The unit will scan, just can't print.