machine went c970 high voltage leak have had this a few times i asked the customer to pull the charge cleaners 1 at a time and tell me which one felt bad she said the black so great i bring a black drum unit pop it in no problem and the copy came out blank so i put the old unit back in this time no code but still blank so im thinking high voltage transformer little board in the back bottom right corner or is it maybe a fuse any ideas would be a great help thanks
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Re: 2050c c970
These C970 codes have been the same all the way back to the Masherbrum series. EVERY time that I've seen the C970 one of the primary chargers has a loose needle electrode or grid. And yes, USUALLY you can tell by resistance from the primary charge cleaner ... but not always. If changing the black drum unit (conceivably with a working primary charge unit) does not solve the C970, I'd take a look at the other three primary charge units.
Any one of the primary charge units can short out, and knock out the high voltage for all four colors. Often it's the seesaw broken, but you might also see the grid riding up on top of the primary charge seal, or the primary charge cleaner installed incorrectly. When the primary charge is shorting out, often you'll also see developer of that same color depleted of toner. In most cases, when you fix the primary charge unit, the developer will re-constitute itself quickly.
I haven't yet seen a C970 caused by the HVT. =^..^=If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^= -
Re: 2050c c970
I didnt add the fact that when I make a copy in color mode all the colors print well just the black missing also the blak dv is not depleated and whith the original drum unit that threw the c970 back in the machine it still prints blank but now no c970 code which leads me to believe there is no voltage going to the black chargerComment
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Re: 2050c c970
One last idea from the database:
"Call for Service C3B0" immediately after yellow developer change. Poor connection between HVT and charge contact springs, because plastic snaps retaining the HVT are not engaged. VOM reads 0.180 Ω between the yellow developing bias terminal and HVT (OUT1-Y). Secure plastic snaps retaining HVT. VOM should read 0.033 Ω or less between yellow developer bias terminal and HVT (OUT1-Y). Functionality can be tested with any developing unit (regardless of color), as long as it has the yellow face plate. Replace developer D-FC30-Y (6LJ70994000). Run developer stir and color calibration.
It's certainly possible that it's the HVT, but I think I'd check to see that it's seated properly first. =^..^=If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=Comment
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Re: 2050c c970
TSB-1619
As blackcat mentioned, the seating of that board could be off just enough to generate some noise, especially
if it isn't grounded properlyComment
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