Maintenance Manual Service Maintenance
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- Service Test
This test consist in printing a standard module (136 characters, 72 lines) having defined
dimensions containing a set of tests checking the parts involved in printing, printhead,
needles, carriage. etc.
Sel/Save key starts the test. A single form of fanfold paper has to be installed in the
front-push tractor. Loading paper... will be displayed during loading.
If the paper is not installed Load Push-Front will be displayed.
Please use this standard printout module as reference when checking all printing quality
problems and tractor movement.
The following is the explanation of the various test performed in this module.
1.
In the first line is printed in draft mode with two patterns of 6 "E" character near
to the left and right margin with a continuous line to check the horizontal printing
skew of the paper at the top margin of the module
2.
In the second line the printer configuration is printed in terms of:
EPROM Code, CARTRIDGE (free or a type), RIBBON (black or color), type of
tractor installed (FRONT-PUSH and REAR-PUSH or PULL) and ASF(yes or no)
3.
Prints a complete pattern which exercises all the 24 needles of the printhead
4.
A paper movement test is performed (with forward and backward movements)
composed by:
a) At first, the printer prints the first and third chopped-lines
b) After point 10 a backward paper movement is performed and a line is printed
in the center of the two chopped lines previously printed.
5.
A set of "H" pattern is printed to check the bidirectional vertical alignment.
6.
A PLU/PLD test to stress the paper movement is performed.
7
Prints three lines of character set with different type of printing (horizontal
density and quality) and with the composed colors (orange, violet and green).
8.
Prints a special pattern of "H" to stress the carriage movement.
9.
Prints a color graphic pattern to check the printing of color graphic test.
10.
Prints a continouous line in line 51 (6 LPI) from the first continuous line in line 1
to check the paper movement.
See step B of item 5.
11
A forward paper movement is performed to reach the 72th line and a pattern as
point 1 is printed.
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LA400 Multiprinter 6. 20 ER-LA400-SV
