3551ci: Solid Black page

[BillyCarpenter]

Re: 3551ci: Solid Black page

Yes, the HVT is definitely shutting down. BUT, why is it shutting down? Is one of the charge rollers arcing to make the HVT shut down? Is it the HVT failure?

Your best odds of solving this in a single visit is to replace the (4) charge rollers and the HVT. =^..^=

I replaced the 4 charge rollers this morning. If the problem persists, I'll replace the HVT.

BTW: Thanks for the education. That's some great information for troubleshooting this problem.

[blackcat4866]

Re: 3551ci: Solid Black page

Thanks. The symptoms can vary widely depending on what machine.

This was a Hanabi with broken yellow developer spacers. The drum was arcing to the developing roller causing the HVT to shut down for a few seconds at a time. Note: There aren't any yellow bars (that how I diagnosed the yellow developing unit):

Test Sample.JPG

I'm sure there are more samples somewhere, I cannot seem to locate right now. =^..^=

[KYO_OEM]

Re: 3551ci: Solid Black page

Hi Billy,

to compare if it`s coming from bk or composite bk you can print out solid bk page by removing the mc for bk drum.
To prevent C5101 during start up you has to switch off U100/ Set AC Auto Adj. (change from "ON" to "OFF")
Now you can remove the mc from the black drum and print out status page or else.
It`s only to compare samples from endcustomer and your own solid print sample.
I agree with BC regarding HVT PWB, but at first take care for the HV contacts.
We have had oxidation on HVT contacts or drum contacts in past.
If you look from the front to the rear side after you removed dk and dv, you will see 3 contact springs on the rear frame for each color.
1 for MC HVT, 1 for sleeve roller HVT and 1 for magnetic roller HVT from DV unit.
Check if it`s deformed and compare with the magenta ones and clean with sandpaper
Finally you has to remove some components from the back to get entrance to the main HVT pwb.
There you will see small springs for the contact to the main HVT.
Remove pwb and clean the spring surfaces with sandpaper.
If it still coming up, you has to exchange the HVT pwb as BC mentioned..
Don`t forget to switch back U100.

[BillyCarpenter]

Re: 3551ci: Solid Black page

Hi Billy,

to compare if it`s coming from bk or composite bk you can print out solid bk page by removing the mc for bk drum.
To prevent C5101 during start up you has to switch off U100/ Set AC Auto Adj. (change from "ON" to "OFF")
Now you can remove the mc from the black drum and print out status page or else.
It`s only to compare samples from endcustomer and your own solid print sample.
I agree with BC regarding HVT PWB, but at first take care for the HV contacts.
We have had oxidation on HVT contacts or drum contacts in past.
If you look from the front to the rear side after you removed dk and dv, you will see 3 contact springs on the rear frame for each color.
1 for MC HVT, 1 for sleeve roller HVT and 1 for magnetic roller HVT from DV unit.
Check if it`s deformed and compare with the magenta ones and clean with sandpaper
Finally you has to remove some components from the back to get entrance to the main HVT pwb.
There you will see small springs for the contact to the main HVT.
Remove pwb and clean the spring surfaces with sandpaper.
If it still coming up, you has to exchange the HVT pwb as BC mentioned..
Don`t forget to switch back U100.

Thanks, KYO. Very useful information. I especially like this part:


"To prevent C5101 during start up you has to switch off U100/ Set AC Auto Adj. (change from "ON" to "OFF")"

[BillyCarpenter]

Re: 3551ci: Solid Black page

I haven't gotten a callback as of yet, so I'm gonna say this one is cured. Thanks for all the help, guys.

[Samanator]

Re: 3551ci: Solid Black page

With the 4551ci I'm working on, the customer is questioning the replacement of the machine. I have tried, first a different drum unit (problem comes back), then a different developer unit (problem comes back).

So now I have been tasked to remove and inspect the hi voltage PCB. Not an easy task as this will require gutting the machine at the customers office. We also don't have one in stock (no machine 4551ci or 5551ci to rob it from).

This will also rack up a lot of billable time just to inspect he HVPCB.

Maybe that's the strategy.

[blackcat4866]

Re: 3551ci: Solid Black page

With the 4551ci I'm working on, the customer is questioning the replacement of the machine. I have tried, first a different drum unit (problem comes back), then a different developer unit (problem comes back).

So now I have been tasked to remove and inspect the hi voltage PCB. Not an easy task as this will require gutting the machine at the customers office. We also don't have one in stock (no machine 4551ci or 5551ci to rob it from).

This will also rack up a lot of billable time just to inspect he HVPCB.

Maybe that's the strategy.

It seems pointless to me to "inspect" the HVT. So what are you going to do if you discover something? Spend two hours putting it back together so you can re-disassemble it later when you have a part?

I'm imagining that your customer wants all this labor for free ... since it's your fault that the HVT failed (*irony* of course its not your fault). I know that it's hard to learn this word, but I would be working up to a big: "no!". There's nothing to be gained by that. =^..^=

[BillyCarpenter]

Re: 3551ci: Solid Black page

With the 4551ci I'm working on, the customer is questioning the replacement of the machine. I have tried, first a different drum unit (problem comes back), then a different developer unit (problem comes back).

So now I have been tasked to remove and inspect the hi voltage PCB. Not an easy task as this will require gutting the machine at the customers office. We also don't have one in stock (no machine 4551ci or 5551ci to rob it from).

This will also rack up a lot of billable time just to inspect he HVPCB.

Maybe that's the strategy.

Yeah, it's a bit of a job pulling the HVPCB. But if you do pull it, do as KYO_OEM suggested and take some sandpaper to the contacts that mate up with the DR's and DV's. I have several of those board if you need one.

[BillyCarpenter]

Re: 3551ci: Solid Black page

It seems pointless to me to "inspect" the HVT. So what are you going to do if you discover something? Spend two hours putting it back together so you can re-disassemble it later when you have a part?

I'm imagining that your customer wants all this labor for free ... since it's your fault that the HVT failed (*irony* of course its not your fault). I know that it's hard to learn this word, but I would be working up to a big: "no!". There's nothing to be gained by that. =^..^=

Yeah, it's never optimal when the customer is making the repair decisions.