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From the Brother support site concerning the HLL3270CDW model: If your machine's cyan, magenta, or yellow toners run out, you can choose Mono in the printer driver to allow you to keep printing. You'll be able to keep printing until the black toner runs out. When the black toner runs out, you won't be able to print until you replace it. So according to Brother, yes, you can print in black without the color toner being available.
Sorry, there was a problem. Please try again later.If your machine's cyan, magenta, or yellow toners run out, you can choose Mono in the printer driver to allow you to keep printing. Here is a FAQ that may help: https://help.brother-usa.com/app/answers/detail/a_id/160095/session/L3RpbWUvMTU0NjYyNzk2NC9zaWQvRWE0d0lfM28=?R3ModelID=hll3270cdw
Sorry, there was a problem. Please try again later.The user's guide says "if either cyan, magenta, or yellow toner reaches the end of its life while printing a color document, the print job cannot be completed. You can start the print job again in Mono mode, as long as black toner is available." I have not tried this.
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