I have C558 machine that had color issue. black and cyan is totally missing from test pattern
TCR level is not stable on cyan and black
manual add toner the TCR will hit 6 to 7% margin but drop to 0 went stabilize
I have C558 machine that had color issue. black and cyan is totally missing from test pattern
TCR level is not stable on cyan and black
manual add toner the TCR will hit 6 to 7% margin but drop to 0 went stabilize
I have changed the sub hopper assy on these before. Make sure the hopper is actually working correctly or change it.
I had this happen on a C458 (yellow), and it was because the drum unit was no longer turning. There was a huge amount of toner to clean up inside the machine - so if you didn't see that this might not be your problem.
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