MX-5001 N white dots on B/W prints

[nottoosharp]

Re: MX-5001 N white dots on B/W prints

Try running about 30 sky shots then run sim 25-2. See if this helps


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[Dark Helmet]

Re: MX-5001 N white dots on B/W prints

Try running about 30 sky shots then run sim 25-2. See if this helps


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Running 25-2 will just inform the machine you replaced DV you did not change. Running 30 sky shots (If you run sky shots put 1" of paper on the lead edge and trail edge of the platen so you don't cause jams) will just deplete the DV of toner forcing the machine to add more. If you run 25-2 while its trying to get it's density back you could make your pages lighter because the machine will calibrate to the new level of toner in the DV mix.

If you replace with a new OEM toner it may take quite a few pages before the OEM toner takes over the mix. I had a small Ricoh i was testing with the toner motor unplugged and it took over 50 double sided pages of a fairly high coverage test chart before it shut down asking for toner. That DV tank on a 5001 would be double the size.

[nottoosharp]

Re: MX-5001 N white dots on B/W prints

Running 25-2 will just inform the machine you replaced DV you did not change. Running 30 sky shots (If you run sky shots put 1" of paper on the lead edge and trail edge of the platen so you don't cause jams) will just deplete the DV of toner forcing the machine to add more. If you run 25-2 while its trying to get it's density back you could make your pages lighter because the machine will calibrate to the new level of toner in the DV mix.

If you replace with a new OEM toner it may take quite a few pages before the OEM toner takes over the mix. I had a small Ricoh i was testing with the toner motor unplugged and it took over 50 double sided pages of a fairly high coverage test chart before it shut down asking for toner. That DV tank on a 5001 would be double the size.

Running all of the sky shots will replace the non oem toner with the good stuff then running 25-2 will reset density to that toner DV mix. Basically the same as when you install new DV.


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[Dark Helmet]

Re: MX-5001 N white dots on B/W prints

Running all of the sky shots will replace the non oem toner with the good stuff then running 25-2 will reset density to that toner DV mix. Basically the same as when you install new DV.


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When you install a fresh bag of DV it has the perfect mix of toner and developer which is supposed to be calibrated too. Running 25-2 on used DV calibrates to a potentially wrong reference. If that batch of DV is not damaged from non OEM toner the new OEM toner should replace it and no further adjustment necessary.
The new copiers will not even allow you to run 25-2 when toners are installed because they don't want to risk toner falling down the pipe and contaminating the fresh DV mix.

From the book:
This adjustment is needed in the following situations:
* When developer is replaced.
NOTE: Be sure to execute this adjustment only when developer is
replaced. Never execute it in the other cases.

Not saying your machine is going to explode if you do this but it will cause issues down the road. We had a tech complaining about faded blacks. He replaced all black components and it kept happening. Prints would be good and a month later faded. Finally i asked if he was doing 25-2 when he replaced the DV. He responded with "whats that?"

[nottoosharp]

Re: MX-5001 N white dots on B/W prints

When you install a fresh bag of DV it has the perfect mix of toner and developer which is supposed to be calibrated too. Running 25-2 on used DV calibrates to a potentially wrong reference. If that batch of DV is not damaged from non OEM toner the new OEM toner should replace it and no further adjustment necessary.
The new copiers will not even allow you to run 25-2 when toners are installed because they don't want to risk toner falling down the pipe and contaminating the fresh DV mix.


Not saying your machine is going to explode if you do this but it will cause issues down the road. We had a tech complaining about faded blacks. He replaced all black components and it kept happening. Prints would be good and a month later faded. Finally i asked if he was doing 25-2 when he replaced the DV. He responded with "whats that?"

Lmao.


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[austonrush]

Re: MX-5001 N white dots on B/W prints

When you install a fresh bag of DV it has the perfect mix of toner and developer which is supposed to be calibrated too. Running 25-2 on used DV calibrates to a potentially wrong reference. If that batch of DV is not damaged from non OEM toner the new OEM toner should replace it and no further adjustment necessary.
The new copiers will not even allow you to run 25-2 when toners are installed because they don't want to risk toner falling down the pipe and contaminating the fresh DV mix.


Not saying your machine is going to explode if you do this but it will cause issues down the road. We had a tech complaining about faded blacks. He replaced all black components and it kept happening. Prints would be good and a month later faded. Finally i asked if he was doing 25-2 when he replaced the DV. He responded with "whats that?"

Just wanted to add if you change the black developer or all 3 colour developers you need to remove the corresponding toner cartridges before running sim 25-2. As mentioned above, the toner and developer is already perfectly mixed so you calibrate the factory mix with 25-2, you don't want toner added to the mix. Based on your print sample and the cost of developer, just put a fresh bag in!

[nottoosharp]

Re: MX-5001 N white dots on B/W prints

Just wanted to add if you change the black developer or all 3 colour developers you need to remove the corresponding toner cartridges before running sim 25-2. As mentioned above, the toner and developer is already perfectly mixed so you calibrate the factory mix with 25-2, you don't want toner added to the mix. Based on your print sample and the cost of developer, just put a fresh bag in!

You must have missed the thread on using black DV to replace color DV. Have a look at that. I had a similar train of thought as you do before I saw how many people are doing it. Considering that this guy isn't near a reliable parts source I made my suggestion to save him time and money.


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[austonrush]

Re: MX-5001 N white dots on B/W prints

You must have missed the thread on using black DV to replace color DV. Have a look at that. I had a similar train of thought as you do before I saw how many people are doing it. Considering that this guy isn't near a reliable parts source I made my suggestion to save him time and money.


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I didn't know anyone was using black developer to replace colour developer. Where is the discussion on this? I totally missed it. I can see why you would be tempted! $$

[nottoosharp]

Re: MX-5001 N white dots on B/W prints

Labeled "Black dev in colour dev units"


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[jonathan3205]

Re: MX-5001 N white dots on B/W prints

Ok guys today I received the new OEM toner and the issue got solved immediately. Guess I will be sticking to OEM toner until I find a compatible brand that works well on this machine, maybe katun or uninet


Thank you very much for your help , the next thing on my list is to replace the cyan drum because its leaving a tiny stripe on my prints and probably I will be asking for your help one more time.


UPDATE: The first 20 prints were good, but then the white dots appeared again. I guess I need to wait until the old toner is purged from the developer unit and the new one kicks in. I will make another 100-150 copies and see if that happens, if not then I will have to replace the developer.