UP-5300 (serv.man6). Frequently asked questions (Aug 2002) - Sharp EPOS FAQ (repair manual). Page 36

Read Sharp UP-5300 (serv.man6) FAQ online

The following
message appears
when I try and sign
onto a slave
machine.
“Master Comms error
00a1”
This is an internal
application error
therefore nothing to
do with external PC
comms, The likely
problem is that the
master machine is
powered off or
disconnected or there
is a network fault.
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