asked Jul 23, 2018 at 10:46pm
Hp HP Color LaserJet 4550

Getting "Reinstall Transfer Belt" error on LaserJet 4550

I was given a 4550 the other day with enough consumables to last my wife (a teacher) her entire career. The only catch was that the printer has the "Reinstall Transfer Belt" error.

I've cleaned out the ITB tray very well, switched ITB's to another that came with the printer, made sure connections and pins were all looking good and not damaged, cleaned out the connections and made sure there was nothing getting in the way of a proper connection

Nobody is going to click on that run 3 link, you stupid troll! Get off the forum.

by moe on Jul 26, 2018 at 10:12am Add comment

I couldn't write everything in the body, so excuse me for posting in response more information.

I've also gone through the following guide in depth

And what I realized is that the motor drum assembly was not turning when I defeated the two switches near the end (steps 9 and 10) and that the drive assembly drum unit is not turning throughout the power on process. I then ordered a new drive drum assembly unit ( and installed it.

However, even after doing this, I am still getting the same error and the drive assembly drum unit is still not turning after replacing it completely. Since the drum drive is not turning, I have then proceeded to order a developing PCB thinking that there may not be power going to the drive drum and am currently awaiting this in the mail.

Does it look like I'm going along the right track? Is there anything else anyone might recommend based on what I've seen here?


by mclarkson on Jul 23, 2018 at 10:47pm Add comment

We used one of those in our office for over 10 years. You should have searched this forum first. There are a few threads. Here is one on a 4500, which is pretty much the same printer. Let us know how you make out.

by moe on Jul 23, 2018 at 11:55pm Add comment

Thanks moe. I've given it a decent cleaning on all sensors I can easily see.

I think what I'll do in the next few days is take the printer outside (only about 15 feet away from where it is now) and blow all the dust I can find out of it with a room fan, and then do the finer areas with a can of compressed air.

There's a sensor that's key to this error (ps5) that I'm having a difficult time locating through the service manual ( or elsewhere. Hopefully doing a good cleaning on the printer will clear the error.

When I get a moment, I'll definitely go in and follow as much information on this forum (like the link you sent), as I've taken this up as my hobby project now when I get free time.

Thanks for the quick reply!

by mclarkson on Jul 24, 2018 at 10:30am Add comment

The easiest thing is to check that connector in the printer. I've seen a few of them where somehow there was a sheet of paper in the way when inserting the belt and a piece of paper got pushed inside, blocking the contacts. Look inside with a flashlight.

by moe on Jul 25, 2018 at 3:34pm Add comment

Thanks gain moe. The connector is completely clean, I've checked both connectors (Tray and ITB) well.

I'm going to buy a cheap air compressor and take the printer outside on the weekend and clean it out, including all sensors and connection points.

I'll let you know how I make out within a few days here.

Thanks again



by mclarkson on Jul 26, 2018 at 10:23am Add comment

I gave the printer a good cleaning, still didn't resolve the error.

I then replaced the developing PCB and my error cleared. I am now able to print successfully!!! (on this dinosaur).

Thanks again for the replies, and I'm relieved to finally see this issue to the end.



by mclarkson on Aug 5, 2018 at 11:11pm Add comment