Not DEC related but still hoping for some help: Problems w/ LJ 4+ Printer

Jon Elson elson at
Wed Apr 3 10:41:35 CDT 2019

On 04/03/2019 03:24 AM, Ali via cctalk wrote:
> Thanks for that tidbit. I didn't realize that a HV failure 
> would not produce any error codes. If that is the case 
> looks like I am recapping a board. Out of curiosity what 
> symptoms were you getting?

Nope, I think there is some sort of self-check on the fuser 
thermistors, but the corona supply is open-loop on most 
printers. There is also a self-check on the laser, as the 
beam has to hit a sensor to start the timing of the pixels.  
So a failed laser or polygon motor will cause an error.

Good luck with it!


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