REV.-A
5.2 DIAGNOSTIC TOOL
Due to the complex nature of printer, long experience and much effort are usually required for effective
trouble-shooting. a diagnostics tool, however, provides operators with an easier and more straight-
forward way of diagnosing and correcting printer problems.
5.2.1 PDOS System Feature
The diagnostics tool designed especially for use with EPSON printers is called PDOS (Printer Diagnostics
Operation System).
PDOS
can be used for maintaining, analyzing and testing all of your printer functions.
This documentation describes how to use this tools for your work.
This program can be used on any MS-DOS host computer. If it is used on another computer, the
appropriate MS-DOS system and
GWBASIC. EXE will be required.
The EPSON printer diagnostic tool
(PDOS)
has the following features:
Easy parts level repair.
A simple structure using a host computer with MS-DOS, one flexible
and a diagnostics ROM.
EPSON supplies only the diagnostics ROM and the flexible disk.
B765 109701
PDOS
For
FX-850/1050
with IBM-PC/QX-l 6
,.
,,
i
..--
disk containing the programs,
Expertise with printer mechanisms or circuits is not required to repair a printer.
No need for a circuit diagram of the printer.
A wide variety of possible uses ranging from repair and analysis to testing.
5.2.2 System Overview
HOST COMPUTER
(MS-DOS)
EPSON
PC/QX-l
6
4
●
t
FLEXIBLE
o
DISK
I
I
(DPOS
SYSTEM)
LOCATION
FX-850
IC4A
FX-105O
(DIAG-
PRINTER
NOSTICS
ROM)
NOTE: The parallel l/F cable is
used when selecting the
test print mode.
Figure 5-2. System Overview
5-2
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