Hp DesignJet 5500 cautionary tale

[Synaux]

Re: Hp DesignJet 5500 cautionary tale

You should make a video of replacing the plenums, if you can. I'm sure that would be useful to a lot of people.

Kiran

What is funny about that is I thought about making my millions on a copy machine repair YouTube channel.

The issue I have (other than editing--college educated on it--just hate it) is that my "expertise" is with Konica Minolta copy machines. They could come after me as all upper-level documentation/software is "confidential." And I would probably come under-fire for eliminating tech jobs.

I do not have a tripod attachment for my phone, but this might be a good excuse to get one (or get the adhesive strip, toothpicks and rubber bands out).

[Orlando69]

Re: Hp DesignJet 5500 cautionary tale

I wish I found this information first before disconnecting the ribbon Cables on the main PCA. Is it possible to blow the Carriage or PCA boards when installing the ribbon cables at J1, J2 and J3 in the reverse order? I realized the mistake I made and corrected it but I am still getting a Power Supply Error #1 when I power up. I repaired the Ribbon cable ends which are holding up well when I reseated them correctly, J1 to J1 , J2 to J2 and J3 to J3. I will purchase new ribbon cable if need be but I am wondering if I Fried the Carriage or PCA board. The PSU was tested by a tech and works well. If the boards are toast, would I get a different error?

HP 5500 Desinjet

Yes! Absolutely avoid disconnecting the trailing cable on these printers if not necessary. It's very easy to blow either the carriage or main PCA by trying to plug the cables back in and the little fingers going everywhichway (technical term.) It's even worse on the 1050C model A because there's no fuse to protect the main PCA.

Even if I'm doing a belt on the 5500 or 1050Cs, I'll keep the trailing cable connected, and unfasten the trailing cable holder in the middle of the machine, and if that's not enough, the one where the cable bends and goes down through the aluminum casting, just to avoid disconnecting it.

Kiran

[ATTACH=CONFIG]46644[/ATTACH]

[Kiran Otter]

Re: Hp DesignJet 5500 cautionary tale

User message "Power Supply Error #1"

This error indicates a short in the 24V electronics circuits. Do not replace the Power Supply; This message only indicates the failure, and is not the cause. Usually this message appears after the insertion of a Trailing Cable into the connectors. This message means that the Trailing cable is incorrectly connected, and it is creating a short on the 24V circuit.


I'd follow the steps in the service manual to troubleshoot this condition.

https://laserpros.com/img/manuals/hp-manuals/hp-designjet-5000-5500-troubleshooting-manual.pdf

Kiran

[D Hook]

Re: Hp DesignJet 5500 cautionary tale

I know this is four years too late for the OP but the trick I use to replace those plenums is to use a hair dryer to soften the tube material. Slips right off. Then repeat to slip the tubes back on. I wouldn't try a heat gun though; too much heat, too fast.