unknown

asked Jul 7, 2000 at 6:26pm
Hp HP OfficeJet D

HP LJ IIP Making Thumping Sound and smearing print

Hi,

I hope that someone here can point me in the right direction.

About a week or so ago, I noticed that my HP LJ IIP printer started making a kind of "thumping" sound whenever the motor was going and it was 'turning' (i.e., even when it did the occasional automatic startup to turn the toner).

In trying to figure out why, I noticed that the three small, gray wheels at the front of the printer appear to "hesitate" at the same time that the "thumping" sound occurs, and, actually, the sound occurs whenever just the wheels are moving (i.e., even when it's done printing).

This sound occurs whether I have the output coming out on top or from the front of the printer, and, actually, whether there's paper moving through the printer or not.

Also, the printing is now "smearing", and there're dustings a toner whenever I try to print. I suspect that this bad printing may be because of whatever's causing that thumping noise...i.e., possibly jarring the toner onto the paper?

I did some tests, running less than full-length sheets through, and it appears that this smearing is only occurring when I print more than 1/2 a page or so. Again, per the above, I think this smearing is synchronized somehow with whatever is causing the thumping sound.

Any ideas what this might be, and what might be involved in repairing it? I know that this is an old printer, but it's been quite reliable and cost-effective, and I've done some of the repairs (replaced scanner motor) on my own before, so I'd like to keep it going if at all possible.

My problem at this point is that I don't know ever where to start? Do I try disassembling the roller mechanisms on the front door (the part that flips open-down?

Thanks! Any suggestions would be greatly appreciated!

Jim

I remember replying to this post on one of the printer ngs. If you missed it, you probably have a bad split gear on the fuser assembly. To remove the fuser, 5 large brass screws, hook your fingers under each end and while pushing out on the plastic sides with your thumbs, pull straight up. The split gear is a white plastic gear on the right side. You can only see it with the fuser out.
by moe on Jul 7, 2000 at 7:53pm Add comment
Hi Moe,

I did post info on my problem on both the printer and one of the HP NGs, and have been monitoring for some responses, but so far none. Perhaps it was someone else's post?

Anyway, thanks for your response. I've been kind of stuck on this one.

A couple of questions:

1) Can you provide the part number for the split gear? That way I can identify exactly where it is in the assembly drawings. Sorry for having to ask.

2) Once I expose the split gear, is there any way to tell if it is that gear that is giving me the problem? I mean, should I look for a missing tooth or something?

Thanks again, and looking forward to your assistance,
Jim


: I remember replying to this post on one of the printer ngs. If you missed it, you probably have a bad split gear on the fuser assembly. To remove the fuser, 5 large brass screws, hook your fingers under each end and while pushing out on the plastic sides with your thumbs, pull straight up. The split gear is a white plastic gear on the right side. You can only see it with the fuser out.

- unknown
P.S. In the assembly drawing, there's a "Gear, 27T/21T", part #RS1-0287-000. Is this the split gear that you're referring to? From the drawing, it looks like it's attached to the fuser assembly?

Jim


: Hi Moe,

: I did post info on my problem on both the printer and one of the HP NGs, and have been monitoring for some responses, but so far none. Perhaps it was someone else's post?

: Anyway, thanks for your response. I've been kind of stuck on this one.

: A couple of questions:

: 1) Can you provide the part number for the split gear? That way I can identify exactly where it is in the assembly drawings. Sorry for having to ask.

: 2) Once I expose the split gear, is there any way to tell if it is that gear that is giving me the problem? I mean, should I look for a missing tooth or something?

: Thanks again, and looking forward to your assistance,
: Jim

- unknown
Moe,

Sorry for the multiple postings. I think that I've found the problem, and, if I'm understanding your original response, it is exactly as you described.

I removed the 5 screws, and lifted the fuser assembly out. On the right end, where the door latch thing is, there's a kind of double-gear (two gears molded together). I gather that this is the 27T/21T gear?

Anyway, I removed the torsion spring, and removed the set screw, and the removed the latch thing, and slid the double-gear out, and found that about 3 teeth on the larger part of the gear were kind of worn down/gone.

Hopefully this is the cause of the thumping AND the smearing?

What do you think?

I'll try to see if I can find this part on Monday, and report back.

Cool!

Thanks again,
Jim


: P.S. In the assembly drawing, there's a "Gear, 27T/21T", part #RS1-0287-000. Is this the split gear that you're referring to? From the drawing, it looks like it's attached to the fuser assembly?

: Jim

:
: : Hi Moe,

: : I did post info on my problem on both the printer and one of the HP NGs, and have been monitoring for some responses, but so far none. Perhaps it was someone else's post?

: : Anyway, thanks for your response. I've been kind of stuck on this one.

: : A couple of questions:

: : 1) Can you provide the part number for the split gear? That way I can identify exactly where it is in the assembly drawings. Sorry for having to ask.

: : 2) Once I expose the split gear, is there any way to tell if it is that gear that is giving me the problem? I mean, should I look for a missing tooth or something?

: : Thanks again, and looking forward to your assistance,
: : Jim

- unknown
Glad I could help. In the future, you'll know not to waste time on those other ngs. You'll either get no response (except mine) or wild guesses. If you can't find the gear, I've got a bunch on the shelf. They're relatively cheap. I guess I could get away with sending it in a padded video tape envelope. I could probably do the whole thing for about $7. I'm doing this from home, so have no access to pricing or p/ns. - moe
> Glad I could help. In the future, you'll know
> not to waste time on those other ngs. You'll
> either get no response (except mine) or wild
> guesses.

I probably would've (posted here first), except I didn't know about this site... I can't remember where I found out about it, but I think I just happened to run across the site while doing a search.

I'm pretty sure it wasn't via your post on the NG, because that STILL hasn't shown up (weird!) on Remarq, which is how I usually monitor responses to my posts.


> If you can't find the gear, I've got a bunch on
> the shelf. They're relatively cheap. I guess
> I could get away with sending it in a padded
> video tape envelope. I could probably do the
> whole thing for about $7. I'm doing this from
> home, so have no access to pricing or p/ns.


Thanks for the offer. I'll let you know for sure if you can give me your final price incl. shipping (to Virginia). While you're at it, could you give me a price for total 3 pcs. (I have 3 LJ IIPs), and you can email the info if you don't want to post it. BTW, you could probably just ship it in a regular business envelope, since it's solid.

Meanwhile, I "borrowed" a good gear from my daughter's IIP, as I wanted to find out for sure if the gear was causing the smearing problem, and, sure enough, it fixed both the thumping and the smearing! She won't need the printer until she starts school again in the Fall, so on Monday, I'll try to see if I can come up with the gear locally (failed so far, though).

Again, thanks for all of your help!

Jim

P.S. I'm curious what, in my original problem description, told you that it was this exact gear?


I'

- unknown
: > Glad I could help. In the future, you'll know
: > not to waste time on those other ngs. You'll
: > either get no response (except mine) or wild
: > guesses.

: I probably would've (posted here first), except I didn't know about this site... I can't remember where I found out about it, but I think I just happened to run across the site while doing a search.

FWIW, I went through exactly this exercise about six months ago;
I didn't try any newsgroups, neither did I know then of the
existence of this BBS (fine service, Moe, thanx).

I effected my own salvation: tracked down the stripped gear, then
hunted around various sites until I found one (bitsnpcs.co.uk, IIRC)
that sold HP parts.

They didn't have the gear in their on-line catalogue, but
spoke to a salesman who quoted me GBP0.90 (=USD1.50) for the gear,
plus GBP5 P&P!!

Still, at least it fixed the problem! :-)

: P.S. I'm curious what, in my original problem description, told you that it was this exact gear?

I would imagine that the "thumping" produced by this gear,
when the teeth are stripped, must be pretty distinctive.

:-)

- unknown