Epson EQUITY 3865X/20 PLUS User Manual page 234

Error code
Parallel port (printer interface)
901
Serial port (RS-232C port)
1101
1101
1102
1103
Alternate serial port
1201
1201
1202
1203
Dot-matrix printer
1401
Hard disk drive(s) and controller
1701
1702
1703
Alternate parallel port
2101
Parallel port (on video adapter)
81nn
C-24 Performing System Diagnostics
Message
ERROR PIN p
control signal ALWAYS LOW
control signal
ALWAYS HIGH
TIMEOUT ERROR
VERIFY ERROR
control signal
ALWAYS LOW
control
signal ALWAYS HIGH
TIMEOUT ERROR
VERIFY ERROR
status
SEEK ERROR
WRITE ERROR
READ ERROR
ERROR PIN p
ERROR PIN p