[CQ] Bizhub 350 BW

[wkwar]

Hello All

Replace drum/compete developer and machine makes great copier. However, when we make duplex copy. The copies have a lot of dots on the right side of the page on the direction of paper ( both sides) . Single sided copies that follow the duplex will have some dots on the back till it cleans up. What is causing this?

[Woxner]

Re: Bizhub 350 BW

did you calbrate the dev? ands did you replace transfer roller. if not clear the drum and dev and run f8

[wkwar]

Re: Bizhub 350 BW

yes replace the entire developer unit with a new roller. old one leaking from the side and worn out. yes did the calibration too. It prints perfect on single sided. Only have lots of dots when printing double sided

[copyman]

Re: Bizhub 350 BW

transfer roller?

[wkwar]

Re: Bizhub 350 BW

the roller on the door? no did not replace that one. yes it was dirty. clean it as much as I can

[Copier Addict]

Re: Bizhub 350 BW

the roller on the door? no did not replace that one. yes it was dirty. clean it as much as I can

The transfer roller needs to be replaced everything time the drum gets replaced.

[copyman]

Re: Bizhub 350 BW

According to maintenance schedule in service manual the Trans roll is replaced at 150k. Drums are rated at 100K for the 350. First I doubt you can get 100K out of a drum unit (same identical unit as the Biz 200/250 with a few tabs so it don't fit), and second I've rarely replaced the transfer roller on this model, only a few left in service but at one time had many machines with well over 200k and never replace the trans roll.

[Copier Addict]

Re: Bizhub 350 BW

According to maintenance schedule in service manual the Trans roll is replaced at 150k. Drums are rated at 100K for the 350. First I doubt you can get 100K out of a drum unit (same identical unit as the Biz 200/250 with a few tabs so it don't fit), and second I've rarely replaced the transfer roller on this model, only a few left in service but at one time had many machines with well over 200k and never replace the trans roll.

Since changing back to OEM toner we now regularly get 150% to 200% out of a drum, which is the same unit between all three models BH200/222, BH250/282 and BH350/362 (no tabs). We use the BH423 transfer roller on the BH350 series, it has a wider edge roller which seems to inflict less damage to the drum. And transfer roller gets replaced at every drum/dev change.

[copyman]

Re: Bizhub 350 BW

I must be very lucky because I might have replaced 2 transfer rollers in all the years servicing that footprint, going back to the Di-200.

Perhaps not using OEM drums is why I never could get 100k pages out of a drum. Average is around 60k with aftermarket toner & drums.

Like I posted only have a few of these models left so not much more to discuss.

[REGSIS]

Re: Bizhub 350 BW

250/350 and also 423 series can get 200k and even 250k out of a drum.

Regarding the problem....there is a fan behind registration roller. Clean it and area area around it. Also clean duplex unit.

[copyman]

Re: Bizhub 350 BW

Are you saying you can get 200-250k out of a drum? Does that include the developer & developer housing or do you change developer at 60K and put old drum back in? Reason I ask is one very common problem I had when rebuilding the units for the 2nd time was the rear mag roller collar would wear and eat into drum. Once Han's (member here) starting selling a modified collar I would change when rebuilding and could use the developer unit indefinitely after that.

[Copier Addict]

Re: Bizhub 350 BW

Are you saying you can get 200-250k out of a drum? Does that include the developer & developer housing or do you change developer at 60K and put old drum back in? Reason I ask is one very common problem I had when rebuilding the units for the 2nd time was the rear mag roller collar would wear and eat into drum. Once Han's (member here) starting selling a modified collar I would change when rebuilding and could use the developer unit indefinitely after that.

We stopped rebuilding drums a long time ago, there was really no savings. We use OEM drums. I said 150% to 200% of yield.
We use the dev spacers from KonMin

[copyman]

Re: Bizhub 350 BW

We stopped rebuilding drums a long time ago, there was really no savings. We use OEM drums. I said 150% to 200% of yield.
We use the dev spacers from KonMin

Still confused, I know you said you used OEM. My question was what about the developer unit? Are you saying the developer last as long as the drum 150-200k? If that's the case then this is where using OEM could really pay off! Like I said i still have a few die hard customers still using a few of these as backup / warehouse machines so I may switch everything to OEM and see.

I said a few posts back not wasting anymore time on an obsolete model but just curious about developer lasting 200k

[Copier Addict]

Re: Bizhub 350 BW

Still confused, I know you said you used OEM. My question was what about the developer unit? Are you saying the developer last as long as the drum 150-200k? If that's the case then this is where using OEM could really pay off! Like I said i still have a few die hard customers still using a few of these as backup / warehouse machines so I may switch everything to OEM and see.

I said a few posts back not wasting anymore time on an obsolete model but just curious about developer lasting 200k

I don't remember the last time I had to replace a developer unit. We replace developer with every drum change.

[wkwar]

Re: Bizhub 350 BW

just noticed that the new developer unit is eating the drum. We replace the entire drum/developer and developer unit. This is OEM unit and we had less than 2K copies on it. Almost seem like the issue with bad bearing/seal that was on earlier unit post ?. However we just replaced this one. See attach picture.