Brother FAX-575 FAX-T102/T104/T106 FAX-817/827/837MC FAX-878 Error 20: Unable to detect a flag field.

Fax machine · taken from the manufacturer’s manual, pages cited

Error code20

The fax machine cannot detect a flag field. The manual lists no action for this code.

Model
Brother FAX-575 FAX-T102/T104/T106 FAX-817/827/837MC FAX-878
Display shows
Unable to detect a flag field. (20)
Type
Error code
Source
Manual p. 124

What 20 means

Unable to detect a flag field. p. 124

Common causes

  • Unable to detect a flag field. p. 124
  • Carrier was OFF for 200 ms or longer. p. 124
  • A frame for 3 seconds or more received. p. 124
  • CRC error in answerback. p. 124
  • Undefined command received. p. 124
  • Invalid command received. p. 124
  • Command ignored once for document setting or for dumping-out at turn-around transmission. p. 124
  • T5 time-out error p. 124
  • CRP received. p. 124
  • EOR and NULL received. p. 124

If 20 is still not resolved

  • Call your Brother dealer or Brother Customer Service. p. 5
    “Call your Brother dealer or Brother Customer Service.”
Open the manual at page 124 All FAX-575 FAX-T102/T104/T106 FAX-817/827/837MC FAX-878 error codes Manual details & download

This page summarises what the manufacturer’s manual says about 20; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Brother. Found a mistake? Report an error.