NEC p5200 Printer Problem
"I have a NEC printer that has an intermittent
CE (ribbon cartridge empty) problem, only the cartridge is new and
good. Anyone knows what senses this condition and what part could
be affecting this? NEC wants $20.00 just to talk to me. Thanks for
any help."
(From: Paul Weber (webpa@aol.com).)
Look at the old ribbon. Does it have a short piece
of transparent tape at the end of the ribbon? If so, the printer
probably has an optical end-of-ribbon sensor; a LED/phototransistor
pair that looks through the ribbon. Does it have a short patch of
aluminum foil tape (probably on the back side of the ribbon) ? If
so, there is probably a pair of contact fingers that rub the back
of the ribbon as it feeds. Look for bent contacts or debris in the
ribbon holder mechanism.
Look at the ribbon holder mechanism in the printer.
Is there switch or contact pair that could sense the motion of the
ribbon cartridge's feed reel? If so, check for free movement and
cleanliness. Does the ribbon holder move with the printhead on this
machine? If so, check that the ribbon cable connecting the carriage
with the remainder isn't damaged and is connected properly at both
ends.
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