![]() ![]() ![]() One of the four 2-bit jet driver address decoders is failed. ![]() Possibility 1: Color decode has failed on the main circuit board. The common points are the main controller board, the controller-to-printhead wiring harness, and any ink feed line before it splits to feed each printhead. Analysis: Since the problem occurred simultaneously on both heads, the problem is a common point between both heads. The yellow ink is not empty and has not been allowed to run dry. Both ink supplies can not fail simultaneously unless the main feed line is completely clogged, and this is not possible with a closed system when the yellow ink is not empty. Assumptions: Both heads can not physically fail in all yellow jets simultaneously. I'm "DrKlahn." I have looked at the problem description and come to the following conclusions. ![]()
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