Epson LG1-1070, Service Manual

Page: 166 / 307

REV.-A
1.6 OPERATING INSTRUCTIONS
This section describes the self-test and hexadecimal dump functions and also includes 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 LOAD/EJECT button. To
run the self-test using the letter quality (LQ) mode, turn the printer on while pressing the LINE
FEED/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.
C o u n t r y / P C
U.S.A.
Ger
.
437
on
0
on
I
f
t
on
II
l - 2 l - 3 l - 4
on on
o f f
on
o f f o f f
o f f o n o f f
o f f o f t o f f
on
on
o f f
o t f o f t
f
on
s p e e d d r a f t
V a l i d
of
on
R e c e i v e b u f f e r
V a l i d
o f f
1 i n c h s k i p
o f f
2 - 2
o f f o f f
Figure 1-B. Self-Test Printout
1.6.2 Hexadecimal Dump Function
To put the printer in hex. dump mode, power it on while pressing both the LOAD/EJECT and LINE
FEED/FORM FEED buttons. In hex. dump mode, the printer prints
out
the hexadecimal representation
of the input data, along with the corresponding ASCII characters. This function is valuable 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.
69 73 20 69 73 20 20 6 5 70
6 b 20 6 4
20 70 72
68 73
66
Figure l-9. Hexadecimal Dump Function
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