Operating Instructions; Self.test; Hexadecimal Dump Function; Paper-Out Detection And Forms Override Function - Epson SQ-1170 Service Manual

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1.6 OPERATING INSTRUCTIONS

This section describes the self-test and hexadecimal dump functions as well as the error states, printer
initialization, and buzzer operation.
1.6.1 Self-Test
To run the self-test using draft mode, turn the printer on while pressing the LINE FEED button. To run
the self-test using the letter quality (LO) mode, turn the printer on while pressing the FORM FEED button.
You can stop or start self-test printing by pressing the PAUSE button. When you are satisfied with the
self-test, stop the printing by pressing the PAUSE button and turn the printer off.
The firmware revision number is printed on the first line of the self-test, followed by the current DIP
switch settings.

1.6.2 Hexadecimal Dump Function

To put the printer in hexdump mode, power it on while pressing both the LINE FEED and FORM FEED
buttons.
In hexdump mode, the printer prints out the hexadecimal representation of the input data, along with
the corresponding ASCII characters. This function is useful for checking the data the printer has received
from the host.
If input data is a control code rather than a character code, a period (.) is printed in the ASCII column.

1.6.3 Paper-out Detection and Forms Override Function

When the paper-out detector detects a paper-out condition, the printer enters the PAUSE mode with
the following status.
PAPER OUT indicator lit
BUSY signal becomes HIGH
ERROR signal becomes LOW
PE signal becomes HIGH
In the PAUSE mode, you can perform the "Forms Override" function by pressing the PAUSE button,
or continue the printing operation by pressing the PAUSE button after loading new paper.
In the forms override function, the printer ignores the paper-out condition temporarily and prints
additional lines beyond the bottom line specified for the page. Once the "Forms Override" function is
performed, the paper-out detection will not be enabled until paper is loaded.

1.6.4 Error Conditions

If the following conditions are detected, the printer recognizes them as errors and enters the error mode.
P a p e r - o u t
Paper-out is detected after performing paper loading operation.
. I n k e n d
Ink end condition is detected. Perform 200 lines of printing or remove the ink cartridge.
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