3552ci missing color fyi

[sparkycivic]

I wanted to throw this out there, an experience from last week.

3552ci suddenly stopped printing yellow with no error codes except hidden C7620 and C7614(auto cal/registration). We went through the whole darn machine looking for obvious failures that could do this without coding, such as primary transfer inside the belt, HV contacts, developer, drum/dv drive, transfer HV, imaging HV, but after all that, it turned out to be a dead laser diode inside the common LSU, that somehow didn't cause any laser BD or stabilization codes!

If I had to go to a call like this again, I'd put a strip of scotch tape on the charge roller and check for a heavy yellow stripe on printouts which is a much faster way to prove that all the rotating and HV systems are working, a tip I learned about late in the process of this call unfortunately!

[blackcat4866]

It sounds like you worked for that one. You don't see many failed laser units on Kyocera.

Thanks for sharing. =^..^=

[tsbservice]

Interesting. Do the Kyo have 4 laser diodes inside common laser unit? I know KonicaMinoltas have 1 diode or maybe 2 on faster devices.
Good info though. I would also think it will code out.

[sparkycivic]

Interesting. Do the Kyo have 4 laser diodes inside common laser unit?.

Starting with the 02/52 series, the laser scanning section has been unified into a single part with either1 or 4 laser diodes mounted to a little circuit board on the side, a single BD sensor on it's own tiny board, a single ordinary polygon motor, and a whole lot of lenses/mirrors.

[sparkycivic]

You don't see many failed laser units on Kyocera.

=^..^=

Our branch can go for years without changing a KYO laser, but we had a 5002 (which gave a LSU code), and this 3552ci within about a week of each other!

[bronco31]

Starting with the 02/52 series, the laser scanning section has been unified into a single part with either1 or 4 laser diodes mounted to a little circuit board on the side, a single BD sensor on it's own tiny board, a single ordinary polygon motor, and a whole lot of lenses/mirrors.

whats BD again? (its on the tip of my brain)

[tsbservice]

whats BD again? (its on the tip of my brain)

BD=beam detect.