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After replacing the HVPS and the drive assembly ratcheting noise remains. Dropouts remain. Now I'm beginning to think it's a bad scanner assembly (I don't know why that would be bad when the image on the toner cartridge is fine). End user has decided not to pursue further repairs on this...

It was making the "ratcheting" noise before I installed the maintenance kit. That was one reason I put it in. I'm investigating whether the lines were out of the print before working on the printer also. I'm thinking that both the Drive ASM and the HVPS may need to be replaced. I'll try to...

Also, printer is making a "ratcheting" noise that sound like a train going over tracks. Could be related??? Bob Werner rwerner@direct-is.com rwerner@isp.com kc4urw@arrl.net rwerner1701@yahoo.com bob@robwerner.com

More information: Removed formatter, lines still in page. Installed transfer roller from another 4100, lines still in page. Half test shows lines in page and toner on cartridge in exact same place. Tried a brand new toner cartridge straight out of box, worked for one day then lines reappear...

Sorry, I should have posted an update. This was a drum maintenance clutch issue. Replacing that fixed the issue. Bob Werner rwerner@direct-is.com rwerner@isp.com kc4urw@arrl.net rwerner1701@yahoo.com bob@robwerner.com

When I remove the toner cartridge I can see toner on it exactly where it should have been on the paper. This is leading me to think the transfer roller in the MK was bad. Bob Werner rwerner@direct-is.com rwerner@isp.com kc4urw@arrl.net rwerner1701@yahoo.com bob@robwerner.com

Installed a maintenance kit on a 4100 and reset the counter. Now the printer is leaving lines off the page. If I change print cartridges it's ok for one day then starts leaving lines off the page again. I have checked the transfer roller and it's installed correctly. The lines that are not on...

tried new toner cartridge, tried replacing toner, tried formatter, no go. Printer has been put out to pasture. Bob Werner rwerner@direct-is.com rwerner@isp.com kc4urw@arrl.net rwerner1701@yahoo.com bob@robwerner.com

JDWVW, I just wanted to let you know that you were right on the money. A new transfer unit fixed the issue. Thanks a lot! Bob Werner rwerner@direct-is.com rwerner@isp.com kc4urw@arrl.net rwerner1701@yahoo.com bob@robwerner.com

Thanks for the tip. I tried rotating the gears as you suggested and they would not move at all. I have advised the end user to aquire another one. I am awaiting its arrival to see if that fixes the issue. I am still looking for a 7300 service manual. Bob Werner rwerner@direct-is.com...

I support a company that has a Phaser 7300. The paper feeds correctly until it gets to the tranfer unit. Here's the skinny from the end user: Previous transfer unit black plastic shifted and was cut. End user installed new transfer unit and paper will not feed correctly now. I have checked the...

I have a laserjet 4100 that will not clear a install toner cartridge message. I have tried more than one cartrige with the same result. My theory is something in the printer is keeping this message on the screen. Where should I look first? Thanks, Bob Werner

I have a phaser 850 that jams in the bottom tray. This is a large capacity tray. There is no pattern to the jams. It might print a 40 page document fine then jam on a 5 page document. The paper slides up the bottom tray to the slot in the top tray and stops. The printer will then try and pick up...

Yes, it did. I replaced the face down delivery unit this morning and that fixed the issue.

I support a laserjet 5si that has a noise/feed issue. Here's the skinny: Installed new maintenance kit today. Printer makes loud ratcheting noise on warmup and when trying to print. Noise appears to be coming from rear door area. Paper will feed 3/4 way through fuser than jam. It fan folds. It...

I appologize the part has five, not four gray rollers attached to it. It appears that this is part of the pick guide assembly and the two plastic tabs that hold it on are broken.

I have a phaser 850 with a broken piece that fell out of the printer when I opened the main paper tray. It is a silver bar with four gray rollers attached. It appears to fit on the front of the printer near or on the pick guide assembly. Both sides of the silver bar have a keyed tab, but one is...