T1200 MFP printer/scanner question

[Lance15]

Re: T1200 MFP printer/scanner question

regarding the tool.. I wouldn't expect a mechanic to charge me for a tool to fix my car.

Sorry for the language, but, that's just a dick move. I don't charge for special tools either. A couple of years ago, I bought the special tools needed to work on HP's Officejet printbar printers. Never used them! Thought they might take off, so, I bought 'em.

[Kiran Otter]

Re: T1200 MFP printer/scanner question

Ah, ok. In you original post you said the encoder strip.

Kiran

[D Hook]

Re: T1200 MFP printer/scanner question

I don't think they replaced the long strip. Just the disc.

[Kiran Otter]

Re: T1200 MFP printer/scanner question

86:01 could be caused by a bad encoder strip; maybe that's why they replaced it.

Kiran

[D Hook]

Re: T1200 MFP printer/scanner question

Unfortunatley, we didn't get the old disc back, which seems suspicious. I'm going to text the tech and see if they still have it.

I can do the diagnostic test on the electronics module next.

We WERE getting 86:01 errors before they replaced the media advance motor and the star wheel motor. None since then.

I'll do the line sensor test again also.

Thanks!

[Kiran Otter]

Re: T1200 MFP printer/scanner question

Not to be off topic but, regarding the tool.. I wouldn't expect a mechanic to charge me for a tool to fix my car. It's a cost of doing business. I wouldn't charge my customer for the tool, personally. And on the same subject, despite all of the Designjets I've worked on, replacing the paper advance motor has been an extremely rare event. The only time I can recall was a 500 that needed one simply because it was worn out.

The roller encoder and sensor has everything to do with the paper advancing correctly. If they did replace it and the same exact problem still exists, then I would suspect the electronics module before I suspected the paper advance motor, assuming they didn't damage the new disc when installing it. It has to be pristine-clean. I suspect they put the old roller encoder disc back in after replacing the motor, and thus the same problem still exists. I'd also suspect the encoder sensor is OK; usually when it dies the printer will just throw 86:01 errors constantly thinking there's a paper jam.

Any encoder, disc or strip, is extremely sensitive to damage and misinterpretation by the sensor reading it. I made this picture by scanning a 500 encoder disk, brand new, at 1200dpi, and had to zoom in on a section just to finally see the actual lines.. and ironically, it appears to already have some damage. But I hope it conveys how fine these microscopic lines that the sensor is looking at are.

explorer_2018-07-13_07-44-13.jpg

So, if they replaced the encoder disc, inspect the old one. And have them replace the disc again, and the sensor. The disc must be cleaned (allegedly with alcohol but I would just use a damp, lint free cloth) after it's installed. Also the service manual tells you to never install a previously used encoder sensor.. (I assume they mean from another printer though.) Then make sure they do the calibrations/tests outlined in the service manual when these components are replaced (Paper Drive, Paper Advance Calibration, Electronics Module, Sensors.)

If the advance calibration fails, run the line sensor test. But, if you run a print and have the same 3.5" breaks in it.. I don't think the advance calibration could ever complete successfully. With the motor, encoder disc and sensor ruled out, the next item would be the electronics module, in my opinion.

Sorry for being so long-winded.

Kiran

[D Hook]

Re: T1200 MFP printer/scanner question

I'll contact them tomorrow hopefully. They told us they replaced the encoder disc but I don't think they replaced the sensor.

We'll keep working at it.

Thanks guys. Much appreciated.

[theengel]

Re: T1200 MFP printer/scanner question

I'm sorry, but they charged YOU for a tool so they could fix your printer?? Wow. I've never had a situation where I had to replace one of those motors, and thus don't even have that tool. You could turn around and sell it and the motor on ebay and get some of your money back at least. That little tool is about $200 from HP. And you know the motor is good (thoroughly tested.

But to make you pay for the tool.. I find that really insulting and unprofessional.. sorry. I hope you can find someone else more competent to work on your printer. I guess the good news is, they at least did right by getting the tool at all.

Kiran

Personally--I would have charged the customer, but they would not have known I was charging for it. Either I would have included it in the price of the transmission, or hiked up the service fees or something. I just mean--I wouldn't put money into a tool that I was only going to use for one single job. Then again--I probably would have charged for the tool and part together (as a kit) and left the tool with the customer. I've never done this job either, and I have no idea what tool you're talking about.

Anyway, I would follow Kiran's advice, and I think you'll be fixed. Replace the encoder wheel and sensor, then do the calibration.

[Kiran Otter]

Re: T1200 MFP printer/scanner question

I should have said this sooner; I don't think you're going to get a successful advance calibration with the paper advance problem you're having. I would resolve that first. The calibration isn't going to fix it.

Replace the roller encoder disc and sensor. The disc likely has either ink/dirt on it or a worn spot through the encoder lines. They're relatively easy to replace.

Kiran

[D Hook]

Re: T1200 MFP printer/scanner question

Is it the line sensor that does the scanning function? Tried photo satin paper today and kept getting same error message. Will try to find some glossy photo paper tomorrow.

I worked on a Z6100 that refused to recognize the maintenance cartridge and it turned out to be the line sensor was bad, even though the LED was lit. Just wouldn't read. So that might be the next part we replace.

Thanks for reading. Any info anyone might have is much appreciated. I REALLY don't want to get beat by this POS!

[D Hook]

Re: T1200 MFP printer/scanner question

Thanks. I have a roll of glossy on hand. I'll give it a try tomorrow.

Thanks!

[Kiran Otter]

Re: T1200 MFP printer/scanner question

Scanning problem usually means the line sensor can't 'see' the print to scan it.. usually due to the wrong media being used. The manual says to use HP Universal Instant-Dry Photo Gloss. I'd suspect any photo paper would likely work.

Kiran

[D Hook]

Re: T1200 MFP printer/scanner question

Well, I thought it was strange also. Not sure that's going to get paid for entirely, especially since the replacement didn't fix the problem.

I just tried doing a paper calibration and got this result. They told me they did a paper advance calibration but I don't think they got a successful calibration done, since I've tried doing this calibration about 4-5 times now, both before and after they replaced the media advance transmission part.

Not sure what the "Scanning Problem" is though. If you look close, you can still see the skipping in the pattern it printed, especially easy to see on the bottom row of "ZZZZ's". Is it possible something is dirty on the bottom of the carriage, not allowing the pattern to be scanned? Or is it possible it is sensing those skips and cancels the calibration because of them? Don't know.

EDIT* BTW, that was printed out on a single sheet of paper 11 x 17. Not on the roll feed.

[Kiran Otter]

Re: T1200 MFP printer/scanner question

Picture of the media transmission that was replaced and the specialty tool they charged us for. The tool came in the same box as the transmission. Also picture of the box they both came in together.

I'm sorry, but they charged YOU for a tool so they could fix your printer?? Wow. I've never had a situation where I had to replace one of those motors, and thus don't even have that tool. You could turn around and sell it and the motor on ebay and get some of your money back at least. That little tool is about $200 from HP. And you know the motor is good (thoroughly tested.

But to make you pay for the tool.. I find that really insulting and unprofessional.. sorry. I hope you can find someone else more competent to work on your printer. I guess the good news is, they at least did right by getting the tool at all.

Kiran

[Kiran Otter]

Re: T1200 MFP printer/scanner question

Kiran--does a transmission include the encoder wheel and sensor, do you know?

I don't believe so.

Your scanner is the same as I listed. The CQ653A is the part number for the printer & scanner married together.

Kiran