[CQ] ECOSYS M5526CDN Yellow Color Streaking

[caudex]

Please see the attached image.
I've attempted the following to fix it:

Disassembled the Drum Unit and:

1. Completely, Emptied the "toner" section of the Drum Unit (where there is the auger)
2. Cleaned the OPC Drum
3. Cleaned the Charge Roller (PCR)
4. Cleaned the Drum Cleaning Blade

I've also replaced the Yellow Toner cartridge.



If I print only black and white, the page comes out clean. Only Yellow is streaking.

[BBM]

Re: ECOSYS M5526CDN Yellow Color Streaking

The color drum units are all the same . Switch with another color to see if problem follows .

[Stooey1871]

Re: ECOSYS M5526CDN Yellow Color Streaking

Please see the attached image.
I've attempted the following to fix it:

Disassembled the Drum Unit and:

1. Completely, Emptied the "toner" section of the Drum Unit (where there is the auger)
2. Cleaned the OPC Drum
3. Cleaned the Charge Roller (PCR)
4. Cleaned the Drum Cleaning Blade

I've also replaced the Yellow Toner cartridge.



If I print only black and white, the page comes out clean. Only Yellow is streaking.

Replace the Drum.

IMO these machines are a nightmare, and not worth repairing out of warranty. So many issues with transfer cleaning unit, K drum and toner solenoids... not to mention a set of toners is more $$ than the device itself.

[copier tech]

Re: ECOSYS M5526CDN Yellow Color Streaking

Please see the attached image.
I've attempted the following to fix it:

Disassembled the Drum Unit and:

1. Completely, Emptied the "toner" section of the Drum Unit (where there is the auger)
2. Cleaned the OPC Drum
3. Cleaned the Charge Roller (PCR)
4. Cleaned the Drum Cleaning Blade

I've also replaced the Yellow Toner cartridge.



If I print only black and white, the page comes out clean. Only Yellow is streaking.

You can't clean a worn drum. replace it.

[caudex]

Re: ECOSYS M5526CDN Yellow Color Streaking

I've replaced the drum and still have the same issue. Only happens to yellow.

What else could it be?
Waste toner box?

Thanks

[Stooey1871]

Re: ECOSYS M5526CDN Yellow Color Streaking

I've replaced the drum and still have the same issue. Only happens to yellow.

What else could it be?
Waste toner box?

Thanks

Y Developer unit at a stretch?

how long after replacing the drum did the issue return?. The waste shutter on the Y toner may be faulty. Is the toner genuine?
The waste for these is the lower half of the toner cartridge. Usually i only see issues with the K toner backing up.

[fishleg]

Re: ECOSYS M5526CDN Yellow Color Streaking

Throw away item... They should have made a separate waste toner for these.

I've heard of the toner solenoid problem as well thankfully not seen it yet. Your problem definitely looks like the drum though don't think a Dev unit would do that. Compat toner and knackered cleaning blade?

[tsbservice]

Re: ECOSYS M5526CDN Yellow Color Streaking

Please see the attached image.
I've attempted the following to fix it:

Disassembled the Drum Unit and:

1. Completely, Emptied the "toner" section of the Drum Unit (where there is the auger)
2. Cleaned the OPC Drum
3. Cleaned the Charge Roller (PCR)
4. Cleaned the Drum Cleaning Blade

I've also replaced the Yellow Toner cartridge.



If I print only black and white, the page comes out clean. Only Yellow is streaking.

I can see repetitive pattern on your sample. What is the distance? I can imagine that distance/3.14 will be the diameter of offending part/roller.