First thing I check on all of these split drum systems (Lexmark, Ricoh and commercial Canons with the drum/dev split from the toner) is a halfway test. Run the same document but make sure it DOESN'T hit the fuser - if the defect stops there, it's the drum. Being a color machine, you probably want to do this with isolated text samples snd see where it smudges as Brother has dedicated CMYK drum units on these, rather then the single drum they moved to on later generations (yet refuses to sell individuals like Lexmark does with their commercial printers that sit on a office floor, while the desktop units have a single combo drum but an option to buy a CMYK or K drum so if your color devs are fine, you replace the bad K dev). If the defect isn't there, you have a bad fuser.
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The problem with these is that the fuser is a royal pain to replace :-(. Brother used to build them where the fuser was accessible from the top (yeah, even the MFPs), but they moved away from that to make the units more compact. These were all early color units with lower lifetime parts, such as 25- 50k page drum units and 70- 75k page ITBs, which required periodic replacement. As a result, you had to swap components more often, but it was manageable. Brother ditched the easily replaceable fuser for compactness later on, but provided us with 100k-page transfer belts and eliminated some of the nonsense about stopping the printers - now, short of toner, they yell at you. Oh, and the lasers were always a wear item on early color lasers from Brother, every 100,000 pages - we just reset them and waited until they went out of spec, because that was borderline pennypinching.
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The problem with these is that the fuser is a royal pain to replace :-(. Brother used to build them where the fuser was accessible from the top (yeah, even the MFPs), but they moved away from that to make the units more compact. These were all early color units with lower lifetime parts, such as 25- 50k page drum units and 70- 75k page ITBs, which required periodic replacement. As a result, you had to swap components more often, but it was manageable. Brother ditched the easily replaceable fuser for compactness later on, but provided us with 100k-page transfer belts and eliminated some of the nonsense about stopping the printers - now, short of toner, they yell at you. Oh, and the lasers were always a wear item on early color lasers from Brother, every 100,000 pages. We would just reset them and wait until they went out of spec, because that was borderline penny-pinching.
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Anyway here's the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9020cdn-9020cdw-mfc-9130cw-9140cdn-9330cdw-9340cdw-service-manual.pdf
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Anyway, here's the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9020cdn-9020cdw-mfc-9130cw-9140cdn-9330cdw-9340cdw-service-manual.pdf
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[quote|format=featured]
Make 4 solid test sheets with big gaps so you can catch it with these color codes
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* [br]
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#00FFFF (Cyan)
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* #00FFFF (Cyan)
* #FF00FF (Magenta)
* #FFFF00 (Yellow)
* #000000 (Black)
Gap these SIGNIFICANTLY so you can catch the bad drum. Maybe make 2 sheets with 2 colors each. This doesn't eliminate the halfway test, but it makes isolation much easier.
First thing I check on all of these split drum systems (Lexmark, Ricoh and commercial Canons with the drum/dev split from the toner) is a halfway test. Run the same document but make sure it DOESN'T hit the fuser - if the defect stops there, it's the drum. Being a color machine, you probably want to do this with isolated text samples snd see where it smudges as Brother has dedicated CMYK drum units on these, rather then the single drum they moved to on later generations (yet refuses to sell individuals like Lexmark does with their commercial printers that sit on a office floor, while the desktop units have a single combo drum but an option to buy a CMYK or K drum so if your color devs are fine, you just replace the bad K dev). If the defect isn't there, you have a bad fuser.
+
First thing I check on all of these split drum systems (Lexmark, Ricoh and commercial Canons with the drum/dev split from the toner) is a halfway test. Run the same document but make sure it DOESN'T hit the fuser - if the defect stops there, it's the drum. Being a color machine, you probably want to do this with isolated text samples snd see where it smudges as Brother has dedicated CMYK drum units on these, rather then the single drum they moved to on later generations (yet refuses to sell individuals like Lexmark does with their commercial printers that sit on a office floor, while the desktop units have a single combo drum but an option to buy a CMYK or K drum so if your color devs are fine, you replace the bad K dev). If the defect isn't there, you have a bad fuser.
-
The problem with these is the fuser is a royal pain to replace :-(. Brother used to build them where the fuser was accessible from the top (yeah, even the MFPs) but they moved away from that to make the units more compact. These were all early color units with lower lifetime parts like 25-50k page drum units and70-75k page ITBs you had to replace periodically, so you had to swap stuff more often BUT you could do it. Brother ditched the easily replaceable fuser for compactness later on, but gave us 100kpage transfer belts and cut some of the nonsense about stopping the printers - now short of a toner, they just yell at you.
+
The problem with these is that the fuser is a royal pain to replace :-(. Brother used to build them where the fuser was accessible from the top (yeah, even the MFPs), but they moved away from that to make the units more compact. These were all early color units with lower lifetime parts, such as 25- 50k page drum units and 70- 75k page ITBs, which required periodic replacement. As a result, you had to swap components more often, but it was manageable. Brother ditched the easily replaceable fuser for compactness later on, but provided us with 100k-page transfer belts and eliminated some of the nonsense about stopping the printers - now, short of toner, they yell at you. Oh, and the lasers were always a wear item on early color lasers from Brother, every 100,000 pages - we just reset them and waited until they went out of spec, because that was borderline penny pinching.
Anyway here's the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9020cdn-9020cdw-mfc-9130cw-9140cdn-9330cdw-9340cdw-service-manual.pdf
+
+
Make 4 solid test sheets with big gaps so you can catch it with these color codes
+
+
* [br]
+
#00FFFF (Cyan)
+
* #FF00FF (Magenta)
+
* #FFFF00 (Yellow)
+
* #000000 (Black)
+
Gap these SIGNIFICANTLY so you can catch the bad drum. Maybe make 2 sheets with 2 colors each. This doesn't eliminate the halfway test, but it makes isolation much easier.
First thing I check on all of these split drum systems (Lexmark, Ricoh and commercial Canons with the drum/dev split from the toner) is a halfway test. Run the same document but make sure it DOESN'T hit the fuser - if the defect stops there, it's the drum. Being a color machine, you probably want to do this with isolated text samples snd see where it smudges as Brother has dedicated CMYK drum units on these, rather then the single drum they moved to on later generations (yet refuses to sell individuals like Lexmark does with their commercial printers that sit on a office floor, while the desktop units have a single combo drum but an option to buy a CMYK or K drum so if your color devs are fine, you just replace the bad K dev). If the defect isn't there, you have a bad fuser.
The problem with these is the fuser is a royal pain to replace :-(. Brother used to build them where the fuser was accessible from the top (yeah, even the MFPs) but they moved away from that to make the units more compact. These were all early color units with lower lifetime parts like 25-50k page drum units and70-75k page ITBs you had to replace periodically, so you had to swap stuff more often BUT you could do it. Brother ditched the easily replaceable fuser for compactness later on, but gave us 100k page transfer belts and cut some of the nonsense about stopping the printers - now short of a toner, they just yell at you.
Anyway here's the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9020cdn-9020cdw-mfc-9130cw-9140cdn-9330cdw-9340cdw-service-manual.pdf