HP CLJ 5500 or 5550

[Jonny5ive]

Hi

We are having problems with toner not sticking to the page and then jamming in the fuser on the following 2 models – HPCLJ 5500 and 5550.Tthis fault has now happened on 3 different printers in 3 different locations, so this rules out consumables, though we have changed all consumables on all sites paper and toners with new fusers and transfer kits.

We have done the following to all printers but have had no success

- Replaced high voltage power supply
- Low voltage power supply
- Formatter
- Dc controller
We changed these parts individually and then everything together from a known working machine but the toner still gets jammed up in the fuser.

Any help would be gratefully appreciated, or if you could suggest anything weve missed.

Jon

[cs_steve]

We are having problems with toner not sticking to the page and then jamming in the fuser

Hi Johnny, this is backwards. Your problem with "toner not sticking to the page" results from your "paper jam" problem ... the toner does not bond to the page because the paper is not completely passing through the fuser... the fuser is what does the bonding.

Because the same problem is occuring on so many different machines, with so many different fusers, my first guess is : the fusers are bad ...

This paper jamming could be from blocked / damaged sensors in the machine, but not likely on so many different ones...

1. Are these rebuilt fusers, all from the same source, or are they truly new, genuine HP fusers?

2. What are the specific error code numbers shown on the display for these paper jams?

3. Do the paper jams occur with every print , or just occasionally (for example, paper jams only when duplexing, or paper jams when multiple pages are printed but not when a single page is printed)?

[MichaelTech]

The fuser power supply is located under the top cover. It controls the fuser.
Check the fuse in it, and look for blown caps.
You may have had power surges at all sites, but that is unusual.
Do not use power strips, or UPS. Use a large gauge power cord.