Running The Self-Test; Connecting Printer Cables; Parallel Cables; Serial Cables - Epson FX-870 Service Manual

Installation and Setup

Running the Self-Test

The self-test checks the printer mechanically and electronically to
properly. If the printer runs the self-test successfully, it means that everything is
operational in the printer (with the possible exception of the interface circuit).
To run the self-test, hold down the PAPER PEED button while turning on the printer. You
can use any paper path and any acceptable paper type to run the self-test. To stop the self-
test, simply turn off the printer.

Connecting Printer Cables

Parallel Cables

The cable you connect to the built-in parallel Centronics interface should be a shielded,
twisted-pair cable no longer than 10 feet (3 meters),
ground connector, attach it to the frame ground terminal beside the parallel connector in
the back of the printer. (See Table 1-13 for pin assignments and signal functions for the
parallel interface.)

Serial Cables

If you install an optional Type B interface in the printer slot, you must use an RS-232C null
modem cable.
The cable configuration for connecting the printer serially to a g-pin (AT-type) computer
connector is shown in the figure below.
Printer
side
3 RXD
7 SGND.
20 DTR
Figure 2-1. Serial Cable Configuration to a O-Pin Computer Connector
2-2
make sure
If the cable has a frame
maximum.
Computer
3 TXD
Epson FX-870/1170
it works