C258 Recycling Coil Broken

**Gaffers01** · 09-05-2022

Hi,

I have a customer with a C258 that has completely magenta copies/prints, I took the drum unit out and the charge roller was caked in magenta toner, the waste toner bottle was also full of magenta toner.
I removed the drum and the recycling coil was blocked solid and on further inspection it had broken where the gear is attached at the back.

I replaced the magenta drum and magenta developer unit and waste toner bottle.

Then today I get the same call (600 copies since last call) and arrive on site and exactly the same thing had happened again.

Do you think it maybe the HV board? I have had this issue on the 4e range but never on this range of machines?

**tsbservice** · 09-05-2022

You clearly have problems with voltages. What are readings is service mode - Vdc and Vg. Compare with other colors. Probably HVT is toasted. Also check the back of machine for clogged magenta air ducts.

**copyman** · 09-05-2022

What is the page count? Genuine or aftermarket toner?

Keep in mind "any" over life consumable can affect "any" other color.

**Gaffers01** · 09-06-2022

The total count is 198k, they did have compatible toner as we were struggling to get Original toner. But it now has original toners back in.

I have a machine in the workshop which I have taken the HV board off and will go there tomorrow and let you know the outcome.

**allan** · 09-06-2022

For interest please check your TCR values. 0% is not good.

**copyman** · 09-06-2022

Originally Posted by Gaffers01

The total count is 198k, they did have compatible toner as we were struggling to get Original toner. But it now has original toners back in.

I have a machine in the workshop which I have taken the HV board off and will go there tomorrow and let you know the outcome.

How long has the original toner been in? Did you put original toner in when you installed new drum & developer as mentioned in your OP? It takes some time for the good toner to work it's way in. If really bad aftermarket toner could of crashed the new dev unit you installed?

**JasonSBE** · 09-06-2022

I've had 2 8 series machines that were using after market toner need to have their sub-hopper replaced for a similar reason. Definitely sounds more like a charge issue but if the numbers look good you may consider cleaning out the sub hopper with a vacuum and making sure there aren't any clumps or anything like that holding toner back and causing it to spill out.

**Gaffers01** · 09-13-2022

An update to this issue

Fitted a new HV board and now all working (1 week since installation)

I've attached before and after screenshots of HV reading for anyone having a similar issue.

Thanks for your help

**Gift** · 09-13-2022

Thanks for sharing these before/after pics

I also seen this kind of issue if someone did a bad job converting a bk drum to color

**tsbservice** · 09-13-2022

Originally Posted by Gaffers01

An update to this issue

Fitted a new HV board and now all working (1 week since installation)

I've attached before and after screenshots of HV reading for anyone having a similar issue.

Thanks for your help

Good job and thanks for following up with proper examples. Yellow TCR still a bit lower maybe you can increase it by 1 or 2 bits.