Epson LQ-670 - Page 100

LQ-670 Service Manual
Rev. A
5-
5
[Abnormal printing during the self-test]
B
NO
NO
YES
NO
YES
YES
YES
NO
NO
YES
YES
NO
YES
NO
NO
YES
YES
NO
Perform sel-test
Measure the
coil resistance
of the print
head.
Does
the printer
print?
Does
the carriage
move?
Is
coil resistance
normal?
Replace the
print head.
Normal?
Normal?
NO
Replace the main
board.
Normal?
Normal?
Is
printing result
abnormally
dark or light?
Reset the adjust
lever.
Replace the printer
mechanism.
Perform platen
gap adjustment
Go to other trouble
shooting.
END
END
END
Print
somethingelse?
Are all
the dots printed
OK?
B
Figure 5-4. Flowchart 3