Due to mechanical failure (printer print head high resistance) caused by the movement of the printing head is blocked, causing the print head impact machine frame, make the print head positioning system error, and cardboard, the printer cannot be reset, then all the lights flashing.JWHservice manual download site
The first: press the "feed", "cleaning" boot "feed", when the lights flashing, and then release the "cleaning" button, until all the lights flickered off after, then the printer normal. This method has 99% repair rate, this method is very simple, but Epson has never publicly.
Second: the above method does not work, the problem may be the motherboard, first remove the cover, remove the motherboard (remove the screw from the back and sides nail), first do not line off the motherboard, the lithium battery on the motherboard (3V) after the boot, problem solving. Because the battery is stored as BIOS, printer printer information.
Third: This is generally not produce. But in our repair many Epson printer or has encountered several cases. There is a serial EPROM motherboard (93C46) program in the chip is a mess, because this chip for the printer memory print head information, replacing the chips have considerable difficulty: first to find a same types of printers, remove the chip (93C46), a single chip (93C46, about 5 yuan), with writer will be removed in the chip program are copied to the new chip, problem solving.
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