Undretoned KM-5530

[Will]

Have a KM-5530 with what looks like undertoned developer. Copies are very splotchy, voids, and gray. U131 was at 149 and changed
to 160 after running U135 to manually force a toneup. U130 developer settings started out at 167,139,102,89. After resetting U130
they changed to 85,139,102,86. Copies look better but still have some random voids on copies. Not sure where the developer setting
numbers should be. Also noticed in service call report that there were 14 total count errors for C5510, 14 total count errors for C5600,
340 total count errors for C5610, so I cleared them all. After running toneup and developer resetting rountines and several copies I noticed
1 total error count returned for C5610. Machine has only got 75k copies, does it have to have a developer change or some sensor or HV replacement???? Any advise would be appreciated.

[10871087]

that machine could be 10 years old, when was the last time the developer was actually changed? You need to do that before you start even looking at codes.

[Dave10]

Definitely. That series is notorious for image problems when the developer gets old or the drum gets even a little worn. Change the developer and run all the setup. Those values you mentioned will reset themselves. Those codes are for drum surface potential issues. They are VERY common. Change the developer and if you still get the codes, change the drum surface potential sensor.

[Will]

that machine could be 10 years old, when was the last time the developer was actually changed? You need to do that before you start even looking at codes.

Regardless of the age of the machine the developer is rated for 400k and shouldn't need replacing at 75k should it?

[Will]

Thanks for the input. Would you have the part number for the drum surface potential sensor?

[Dave10]

Developer breaks down over time. It doesn't matter about the count if it's 10 years old. The sensor P# is 34093331.

[Sayen's]

Check transfer block, sounds like you need a DPS, when chaning dps you need to change developer and drum. Set Sim 100 to 168, Sim 101 to 207 and Sim 103 should read between 120 and 140. Transfer blocks arc out causeing this to happen.

[Will]

Check transfer block, sounds like you need a DPS, when chaning dps you need to change developer and drum. Set Sim 100 to 168, Sim 101 to 207 and Sim 103 should read between 120 and 140. Transfer blocks arc out causeing this to happen.

Thanks for the input. Currently Sim 100 reads 175, Sim 101 has 3 readings Dev bias 202, TC set 210, and AC set 200. The Sim 103 reads 181. When you say set Sim 101 to 207 which of the three readings are you referring to? Has a new drum already. Do you agree
with the other person about replacing the drum surface potential sensor?

Also can you give me the part numbers for the DPS, transfer blocks, & corona wires, would
really appreciate it? Thanks again in advance.

[Sayen's]

Part number for DPS is 34093331, T/C blocks 2BC17030 front housing 2BC17040 rear housing, corona wire is 74669000 Tungsten wire(OX). Sim 101 developer bias 207 and 52. Hope this helps.

[Hutcheson]

I would replace the T/S blocks and if the copy is still light I would run Sim 20. We've done that several times on the 4530/5530 with excellent results. I would run Sim 20 first if I didn't have the blocks to change.

[10871087]

Regardless of the age of the machine the developer is rated for 400k and shouldn't need replacing at 75k should it?

Developer gets old an shitty, just like everything else. If a fuser bearing was making a noise at 75k would you not replace it just because it should go 400k? BTW, once you started changing your toner control settings and re-running sim 130 you lost any good developer numbers you may have had.

I wasn't saying that developer was definately your issue, but it is relatively inexpensive, easy to change and old so it was the first place I would have started.