Self-Test Function; Hexadecimal Dump Function - Epson LQ-300 Service Manual

Operations
Press LF/FF and Paper park (*1)
Font buttons at the
same time
Insert a sheet to the
manual insetiion slot
tear-off position.
(*2) Gce a manually inserted sheet is loaded, the printer enters manual insertion mode. After
that, even if data remains in the buffer, the printer goes into a paper out error state at the end
of every a sheet and waits for insertion of the next sheet. The CSF is enabled again by sheet
loading operation from the CSF

1.4.2 Self-test Function

section explains how to run the self-test.
1. Hold down the LF/FFbutton and turn on the printer to start the self-test.
2. If paper is not loaded, the printer attempts to load it.
3. The printer prints alphanumeric characters continuously.
5. Quit self-test mode printing bypressingthe

1.4.3 Hexadecimal Dump Function

The hexadecimal dump is a useful tool for troubleshooting data control problems. This section
describes how to run a hex dump.
1. Turn on the printer while holding down the
2. If paper is not loaded, the printer attempts to load it (either single sheet or continuous paper).
3. If the printer cannot Ioad the paper, it indicates a paper-out error. In this case, insert paper
again, and press the
4. The printer waits for data after printing the message "Hex dump(*)."
"Hex Dump":
"Codes Hexadecirnaux":
"Dump esadecimale":
5.
Received data is printed as both hexadecimal codes and ASCII characters. If a corresponding
printable character does not exist, the printer outputs a period (.).
6. Quit hexadecimal dump printing by pressing the PAUSE button and turning the printer off.
hex dump mode, the character table depends on the default setting, and 10 cpi draft is
Note: In
selected automatically.
Rev. A
Table 1-16. Paper Feeding Functions
Tractor Feed
Not Paper Out Paper Out State
—
initialization.
or by
Pause
button.
Pause
English or German is selected
French is selected
Italian is selected
Spanish is selected
Friction Feed
Not Paper Out
Line feed
Eject
—
—
button and turning the printer off.
buttons.
Product Description
I
Paper Out State
Load a sheet (*2)
Load a sheet (*2)
After 2 seconds
load the sheet
1-17