ImageWriter: Continously Prints "U"s During Self Test


PROBLEM DESCRIPTION:The ImageWriter continuously prints the character
"U" when print is initiated by Self Test.

CAUSE: Possible software problem or malfunctioning power supply
regulator transistor.

CURE: 1. Power off IW, disconnect it from the computer, then press
form feed while you turn it back on. This should cause the printer to
perform its SELF TEST (a standalone printout of character sets). If it
is a software problem, the power on reinitialization will cure it and
the SELF TEST printout will occur. If it's a hardware problem Us will
be printed during the SELF TEST. If the latter is the case, go to step 2.

2. Replace transistor assembly 970-0082. If problem is still not
found, search on ImageWriter General Troubleshooting.


Published Date: Feb 19, 2012