Ar-m455u light prints.

[JLSam]

So I've been here a few times. It's printing light. Let me tell you what I have done.

I have replaced the developer. Developing unit. Transfer roller. Drum. Charger. Opened laser unit and cleaned it.

Toner motor activation OK.

What should I do?



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[JLSam]

Update.

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[ZOOTECH]

Look for toner dust on the slit glass in front of the LSU. Another possibility is that the drawer is not fully closing on the left side.

[JLSam]

Look for toner dust on the slit glass in front of the LSU. Another possibility is that the drawer is not fully closing on the left side.

Thank you for your fast response. I will check these right now. I noticed that after Sim 25-1 for the toner server output, I got an F2-39 code.

F2-39 Is a process thermistor trouble.

However, the DV UNIT is new.

I'll get back to this after I check the things you've mentioned.

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[NeoMatrix]

Problem is for both printing and copying ?

[JLSam]

Problem is for both printing and copying ?

Yes.

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[JLSam]

I reseated every cable and harness in PCU PWB.



It's better. Hmm... I'm going to replace this board. I wonder if they are still available.

Thank you all for your advice.

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[ZOOTECH]

Thank you for your fast response. I will check these right now. I noticed that after Sim 25-1 for the toner server output, I got an F2-39 code.

F2-39 Is a process thermistor trouble.

However, the DV UNIT is new.

I'll get back to this after I check the things you've mentioned.

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I not absolutely sure, but I think the process thermistor might be in the drum unit. Did you replace just the drum or the whole unit?

[NeoMatrix]

Is this the model machine were over heating warps and twists all the PFU plastic frame above the fuser unit ?

...

[blackcat4866]

I not absolutely sure, but I think the process thermistor might be in the drum unit. Did you replace just the drum or the whole unit?

The temperature/humidity sensor (HUS-DV) is on the developing unit. Since you've already changed the developing unit, I would then pin out the connections to CN8 on the PCU (pins 4, 5, 10, 11). If everything pins out properly, then all that's left is the PCU.

Is that 127 degrees Farenheit? Is there any chance that's an accurate reading? =^..^=