Lexmark T63x Redrive


We recently received a good question via email. Here’s the Q and Brian’s (our Lexmark Tech Blogger) response.  Any one else have a perspective to share on this problem?  Please post a reply if you can help.

Question:  A number of my customers are still using T63X printers in their insurance and pharmacy businesses.  I have convinced most of them that regular service and genuine Lexmark toner are the answer to longevity and few problems.  I have a T634, 500 sheet, in an insurance office that is just over 350 k pages although it has not had a good service history.  It constantly breaks the spring tab from re-drive assembly redirector 99A1857.  Three so far.  I have replaced the fuser unit with a reman Lexmark unit and checked the flags for jams, the output guide for toner buildup and made sure it is genuinely clean and straight.  Last one lasted 3 months but it did it again.  I have replaced the entire redrive assembly as well as just the redirector part and spring. Well over thirty years in the computer environment so I trust myself but feel I am never too old to learn or teach what I know.  Any ideas on this one?

Response:  You didn’t mention whether it had a mailbox installed so I’m assuming it doesn’t. So….
Since the only time that diverter is used, to the best of my knowledge, is when there is a mailbox installed, and after consulting with my learned colleagues, I have to say that there is some human interaction causing the problem. If there is a paper jam at the back door and the user can’t move the printer to get at it they might be yanking a little too hard in the wrong direction, as end users are known to do….    😉

If they’re leaning on the re-drive cap the diverter can’t pop loose and either that stop tab or the hook would break off.

Something to look into would be the Diagnostic Menu (page 3-1) and print the error log (page 3-7). It only keeps 12 errors but it should tell you if there have been ‘Jams at Rear Door’.

If it happens to the loaner you put in place you’ll have your proof.

As far as construction of the assembly goes, the placement of the gears for the output rollers in front of the diverter prevent that drive belt from rubbing and causing any damage. The spring isn’t strong enough to break the hook. The hook and tab are protected during removal and installation. When it’s fully activated the diverter is stopped by the re-drive assembly itself so over extension shouldn’t cause the breakage.

Anyone else have any ideas? Thanks!

Troubleshooting Lexmark 4069 Fusers – Part 1


In my previous post I wrote about Lexmark T-Series fusers in general. Now I’ll get more specific. In this post I’ll try to provide some, hopefully interesting, observances about individual model idiosyncrasies, challenges and opportunities.

Remember, I’m not trying to tell anybody how to troubleshoot. Nor am I claiming that all the information contained here is gospel. This is just some stuff I’ve noticed, experienced and talked with other techs about over the years. It’s information that’s worked for me. I hope it works for you.

At the outset I’d like to say that Lexmark fusers are ‘complicated simplicity’. I said in the last post that Lexmark hasn’t changed much of the basic design since the Optra S. That’s the ‘simplicity’. The ‘complicated’ enters the picture with the number of little variations within each model according the Type Number.

Let’s begin our fuser journey with the Lexmark T61x.  Continue Reading