Bizhub 350 - Multiple issues

[GinaTallmanCPA]

Hi Everyone!

I have been lurking on here for a while trying to fix my Bizhub 350. I'm an accountant by trade but sometime I just don't want to anymore, so I take a break to work on my machine. It's old enough to drive in the US and I've had techs tell me it's not worth fixing and try to sell me a new machine. They're right, of course, but this is just a project for me. It has a special place in my heart.

Here are my issues, and how I've addressed them:

1. Started with Error C2557. Couldn't try ATDC adjustment though, because of #2.
2. Dead touch panel. Ordered a used replacement from eBay, replaced it. It's finicky, and works about 80% of the time, so I think I may need to replace it again soon.
3. Once I got the touch panel working, mostly, I tried some ATDC adjustments to correct Error C2557, but I honestly didn't know when the last time the drum and developer were replaced, so I just went ahead and did that. I spilled some developer while doing this, maybe about a quarter cup worth? And then of course not 100% sure I put the thing back together right. Also replaced the drum cleaning blade.
4. Went through the process on one of the threads here, don't remember exactly, but it was something like, turn machine back on with right door open, get into service mode, reset drum count, reset developer count, close door, wait 10 seconds, run F8. I can track it down and share it if it's helpful.
5. That worked! But the copies were smudgy (see attached). So I tried cleaning some rollers right inside the right door. I also took apart the IU again just to make sure everything seemed like it was put together right, which it did. After putting it back together again and running maybe 30 copies they started coming out clean! I was really excited.
6. Buuut, and I've had this issue for years with it, the spooling is incredibly slow. It can take an hour or more to begin printing a 30-page PDF. So, I decided to try to fix that next. I tried the most recent drivers from KM and also tried all three types (PCL, PS, FAX). PCL is what I've been using, and it is the best of the three. It seems like it doubles the size of the file before sending it to the printer. So for example I was sending a single page word document that shows 16.1kb on my hard drive, but when it pops up on the print queue, it shows it's between 29.9kb and 64kb (depending on which driver I'm using). I have a junky laptop USB'd into the printer; I thought maybe if we shared the printer from it, it would print faster, but there's no noticeable difference between that and network printing. Anyway, I can live with this, and just know it's going to take a long time to print.
7. But, the smudges came back on the copies.
8. And then Error C2557 came back.

So. Any suggestions? I am wondering if I damaged the IU when I was replacing the drum/developer and if I should try replacing it? Or if an ATDC setting change would help? I tried changing it from 176 to 170 but I'm afraid to change it more than that. I was able to clear the error once by running F8 again but then it came back again.

Thanks in advance!

Gina20240111_,,i! I.pdf

[femaster]

Re: Bizhub 350 - Multiple issues

Hi Everyone!

I have been lurking on here for a while trying to fix my Bizhub 350. I'm an accountant by trade but sometime I just don't want to anymore, so I take a break to work on my machine. It's old enough to drive in the US and I've had techs tell me it's not worth fixing and try to sell me a new machine. They're right, of course, but this is just a project for me. It has a special place in my heart.

Here are my issues, and how I've addressed them:Started with Error C2557. Couldn't try ATDC adjustment though, because of #2.

1. Dead touch panel. Ordered a used replacement from eBay, replaced it. It's finicky, and works about 80% of the time, so I think I may need to replace it again soon.
2. Once I got the touch panel working, mostly, I tried some ATDC adjustments to correct Error C2557, but I honestly didn't know when the last time the drum and developer were replaced, so I just went ahead and did that. I spilled some developer while doing this, maybe about a quarter cup worth? And then of course not 100% sure I put the thing back together right. Also replaced the drum cleaning blade.
3. Went through the process on one of the threads here, don't remember exactly, but it was something like, turn machine back on with right door open, get into service mode, reset drum count, reset developer count, close door, wait 10 seconds, run F8. I can track it down and share it if it's helpful.
4. That worked! But the copies were smudgy (see attached). So I tried cleaning some rollers right inside the right door. I also took apart the IU again just to make sure everything seemed like it was put together right, which it did. After putting it back together again and running maybe 30 copies they started coming out clean! I was really excited.
5. Buuut, and I've had this issue for years with it, the spooling is incredibly slow. It can take an hour or more to begin printing a 30-page PDF. So, I decided to try to fix that next. I tried the most recent drivers from KM and also tried all three types (PCL, PS, FAX). PCL is what I've been using, and it is the best of the three. It seems like it doubles the size of the file before sending it to the printer. So for example I was sending a single page word document that shows 16.1kb on my hard drive, but when it pops up on the print queue, it shows it's between 29.9kb and 64kb (depending on which driver I'm using). I have a junky laptop USB'd into the printer; I thought maybe if we shared the printer from it, it would print faster, but there's no noticeable difference between that and network printing. Anyway, I can live with this, and just know it's going to take a long time to print.
6. But, the smudges came back on the copies.
7. And then Error C2557 came back.

So. Any suggestions? I am wondering if I damaged the IU when I was replacing the drum/developer and if I should try replacing it? Or if an ATDC setting change would help? I tried changing it from 176 to 170 but I'm afraid to change it more than that. I was able to clear the error once by running F8 again but then it came back again.

Thanks in advance!

Gina[ATTACH]61118[/ATTACH]

Wow... OK, lets see if I can shed some light on any of this.

1. 2557 - Toner density error. The percentage of toner mixed in with the developer is incorrect (Irrelevant as you've changed this now)
2. Known issue. It's actually just the touch portion of the panel, not the entire assembly. The conductive glue breaks down over time and it stops responding. Just the touch panel can be purchased separately and replaced. Not overly difficult, and sounds like something you could handle. With your current one being finicky, it might need to be calibrated. Not too difficult to do. On the right side of copier, just in front of where the network cable plugs in is a small removable cover. Inside that cover is a small push-button. This is the reset button. Press this in momentarily, then watch the display. Look for a small dot to appear in the upper right? (might be left?) corner. When you see that press the #3 on control panel. It will prompt you far a password, which if my memory serves me correctly is the number 0 eight times. In the menu that comes up will be touch panel adjustment. It's pretty self explanatory, press the + symbols on the touch screen. I can't recall if it reboots itself afterward or not. If not, exit out as far as you can, and then reboot with the main power switch in the back left of the machine.
3. 1/4 cup sounds like a lot, that would have been one pretty good sized pile. I'm guessing it was less, but if things were working afterwards, which it sounded like they wereI guess , I wouldn't worry about it. One bit of advice: if you didn't do it at the time of the developer change, be sure to clean out the toner filter that is found on the back side of the development unit. It's just a flat filter held on by a rectangular plastic frame that snaps on. Single hook on the bottom, 2 tabs on the top when you go to reinstall it.
4. Aside from the 10 second wait, everything sounds perfect there. Generally I hit the F8 button right away after closing the side door, as sometimes an error code will pop up if you wait too long. If things ran for a while and you didn't see an error come up, you should be fine.
5. It sounds like you bought a rebuild kit for the drum, instead of a new (impossible to find these days) or an already rebuilt drum. The smudges were almost certainly caused by a lack of lubrication on the new cleaning blade and/or drum. In the old days a fine white powder was applied to the drums and cleaning blades so the blade wouldn't stick to the smooth drum surface and chatter/vibrate or even flip backwards. Later on they started using toner as a lubricant. I'm guessing you didn't put anything on either, which is why you had the streaks. Eventually you ran enough pages through the machine and got enough toner onto the blade to allow it glide over the drum smoothly.
6. Ah, PDF problems. PCL is the driver you want to use. Unfortunately due to the immense amount of data contained in a PDF that needs to be processed and convert to something the copier can understand, and the fact that the copier is old as dirty (no offense intended), it just isn't powerful enough to do this in a timely manor. Part of that time is also based on the speed and ability of the PC it is coming from. If you are using Adobe Reader on the PC to print from, there is only one way I am aware of to speed up printing on an old goat like that. There is an option in the print dialog of Adobe Reader that you can select which is called something like, "Print as image". The wording might not be exact, but it is close to that. What that does is it tells Adobe Reader to process the document and convert each page into an image before sending it to the printer (copier). You will have to check the quality of the output is OK with you, but to be honest, I've never really seen any degradation. This should speed up your printing time by quite a bit.
7. I probably should have read the entire post before I started replying I guess. This might still be an issue with the cleaning blade. Could also be an issue with the DR Blade gap if you removed (or loosened) the three screws attached to the metal "bar" that goes across the top of the magnetic roller in the development unit. The "blade" is has a factory calibrated gap to let only a certain amount of toner past it on that mag roller. Too much toner/developer on the mag roller and it will start to touch the drum surface. You will end up with dirty copies and eventually will lead to surface damage on drum.
8. 2557 brings us right back to toner concentration error. At this point I'm going to make and educated guess that there is too much toner in the developer mix. These machines have a known issue when they get old that causes the machines to add too much toner of the developer. In the toner addition drive unit, there is a foam pad used for noise dampening that breaks down with age and gets sticky. There is a solenoid which engages and causes the toner add mechanism to rotate and add the toner to the developer as it's used up. The solenoid is only supposed to activate momentarily causing the toner add to make one rotation at a time. The solenoid gets stuck to the now sticky foam pad and doesn't return, which allows the toner add to keep on rotating and adding way more toner then it should have. The fix is really simple, just removed the pad and glue from the metal frame of the assembly. Once removed, you might now hear a slight clicking noise each time the machine adds toner, but it would work properly at least. Unfortunately, this assembly is a bit of bear to get to and get out of the machine. It requires fairly extensive disassembly.

Check out this thread here: bizhub 250 TCR issue C2557
There is some information in it that pertains to #8 above. I have a picture in my post in the thread which shows the assembly I'm referring to, though it's already out of the machine at that point.

[kingarthur]

Re: Bizhub 350 - Multiple issues

Wow... OK, lets see if I can shed some light on any of this.

1. 2557 - Toner density error. The percentage of toner mixed in with the developer is incorrect (Irrelevant as you've changed this now)
2. Known issue. It's actually just the touch portion of the panel, not the entire assembly. The conductive glue breaks down over time and it stops responding. Just the touch panel can be purchased separately and replaced. Not overly difficult, and sounds like something you could handle. With your current one being finicky, it might need to be calibrated. Not too difficult to do. On the right side of copier, just in front of where the network cable plugs in is a small removable cover. Inside that cover is a small push-button. This is the reset button. Press this in momentarily, then watch the display. Look for a small dot to appear in the upper right? (might be left?) corner. When you see that press the #3 on control panel. It will prompt you far a password, which if my memory serves me correctly is the number 0 eight times. In the menu that comes up will be touch panel adjustment. It's pretty self explanatory, press the + symbols on the touch screen. I can't recall if it reboots itself afterward or not. If not, exit out as far as you can, and then reboot with the main power switch in the back left of the machine.
3. 1/4 cup sounds like a lot, that would have been one pretty good sized pile. I'm guessing it was less, but if things were working afterwards, which it sounded like they wereI guess , I wouldn't worry about it. One bit of advice: if you didn't do it at the time of the developer change, be sure to clean out the toner filter that is found on the back side of the development unit. It's just a flat filter held on by a rectangular plastic frame that snaps on. Single hook on the bottom, 2 tabs on the top when you go to reinstall it.
4. Aside from the 10 second wait, everything sounds perfect there. Generally I hit the F8 button right away after closing the side door, as sometimes an error code will pop up if you wait too long. If things ran for a while and you didn't see an error come up, you should be fine.
5. It sounds like you bought a rebuild kit for the drum, instead of a new (impossible to find these days) or an already rebuilt drum. The smudges were almost certainly caused by a lack of lubrication on the new cleaning blade and/or drum. In the old days a fine white powder was applied to the drums and cleaning blades so the blade wouldn't stick to the smooth drum surface and chatter/vibrate or even flip backwards. Later on they started using toner as a lubricant. I'm guessing you didn't put anything on either, which is why you had the streaks. Eventually you ran enough pages through the machine and got enough toner onto the blade to allow it glide over the drum smoothly.
6. Ah, PDF problems. PCL is the driver you want to use. Unfortunately due to the immense amount of data contained in a PDF that needs to be processed and convert to something the copier can understand, and the fact that the copier is old as dirty (no offense intended), it just isn't powerful enough to do this in a timely manor. Part of that time is also based on the speed and ability of the PC it is coming from. If you are using Adobe Reader on the PC to print from, there is only one way I am aware of to speed up printing on an old goat like that. There is an option in the print dialog of Adobe Reader that you can select which is called something like, "Print as image". The wording might not be exact, but it is close to that. What that does is it tells Adobe Reader to process the document and convert each page into an image before sending it to the printer (copier). You will have to check the quality of the output is OK with you, but to be honest, I've never really seen any degradation. This should speed up your printing time by quite a bit.
7. I probably should have read the entire post before I started replying I guess. This might still be an issue with the cleaning blade. Could also be an issue with the DR Blade gap if you removed (or loosened) the three screws attached to the metal "bar" that goes across the top of the magnetic roller in the development unit. The "blade" is has a factory calibrated gap to let only a certain amount of toner past it on that mag roller. Too much toner/developer on the mag roller and it will start to touch the drum surface. You will end up with dirty copies and eventually will lead to surface damage on drum.
8. 2557 brings us right back to toner concentration error. At this point I'm going to make and educated guess that there is too much toner in the developer mix. These machines have a known issue when they get old that causes the machines to add too much toner of the developer. In the toner addition drive unit, there is a foam pad used for noise dampening that breaks down with age and gets sticky. There is a solenoid which engages and causes the toner add mechanism to rotate and add the toner to the developer as it's used up. The solenoid is only supposed to activate momentarily causing the toner add to make one rotation at a time. The solenoid gets stuck to the now sticky foam pad and doesn't return, which allows the toner add to keep on rotating and adding way more toner then it should have. The fix is really simple, just removed the pad and glue from the metal frame of the assembly. Once removed, you might now hear a slight clicking noise each time the machine adds toner, but it would work properly at least. Unfortunately, this assembly is a bit of bear to get to and get out of the machine. It requires fairly extensive disassembly.

Check out this thread here: bizhub 250 TCR issue C2557
There is some information in it that pertains to #8 above. I have a picture in my post in the thread which shows the assembly I'm referring to, though it's already out of the machine at that point.

Brilliant reply, as I was reading it, everything about that model started coming back to me - definitely deserve a boost to your rep - which I have done

[tsbservice]

Re: Bizhub 350 - Multiple issues

Brilliant reply, as I was reading it, everything about that model started coming back to me - definitely deserve a boost to your rep - which I have done

He is one of most valuable contributors here n KM forum. It's always pleasure for me to read his opinions, REP boost is well deserved

[Synthohol]

Re: Bizhub 350 - Multiple issues

and another rep boost for the effort it took just to remember all that!!

[GinaTallmanCPA]

Re: Bizhub 350 - Multiple issues

Wow... OK, lets see if I can shed some light on any of this.

1. 2557 - Toner density error. The percentage of toner mixed in with the developer is incorrect (Irrelevant as you've changed this now)
2. Known issue. It's actually just the touch portion of the panel, not the entire assembly. The conductive glue breaks down over time and it stops responding. Just the touch panel can be purchased separately and replaced. Not overly difficult, and sounds like something you could handle. With your current one being finicky, it might need to be calibrated. Not too difficult to do. On the right side of copier, just in front of where the network cable plugs in is a small removable cover. Inside that cover is a small push-button. This is the reset button. Press this in momentarily, then watch the display. Look for a small dot to appear in the upper right? (might be left?) corner. When you see that press the #3 on control panel. It will prompt you far a password, which if my memory serves me correctly is the number 0 eight times. In the menu that comes up will be touch panel adjustment. It's pretty self explanatory, press the + symbols on the touch screen. I can't recall if it reboots itself afterward or not. If not, exit out as far as you can, and then reboot with the main power switch in the back left of the machine.
3. 1/4 cup sounds like a lot, that would have been one pretty good sized pile. I'm guessing it was less, but if things were working afterwards, which it sounded like they wereI guess , I wouldn't worry about it. One bit of advice: if you didn't do it at the time of the developer change, be sure to clean out the toner filter that is found on the back side of the development unit. It's just a flat filter held on by a rectangular plastic frame that snaps on. Single hook on the bottom, 2 tabs on the top when you go to reinstall it.
4. Aside from the 10 second wait, everything sounds perfect there. Generally I hit the F8 button right away after closing the side door, as sometimes an error code will pop up if you wait too long. If things ran for a while and you didn't see an error come up, you should be fine.
5. It sounds like you bought a rebuild kit for the drum, instead of a new (impossible to find these days) or an already rebuilt drum. The smudges were almost certainly caused by a lack of lubrication on the new cleaning blade and/or drum. In the old days a fine white powder was applied to the drums and cleaning blades so the blade wouldn't stick to the smooth drum surface and chatter/vibrate or even flip backwards. Later on they started using toner as a lubricant. I'm guessing you didn't put anything on either, which is why you had the streaks. Eventually you ran enough pages through the machine and got enough toner onto the blade to allow it glide over the drum smoothly.
6. Ah, PDF problems. PCL is the driver you want to use. Unfortunately due to the immense amount of data contained in a PDF that needs to be processed and convert to something the copier can understand, and the fact that the copier is old as dirty (no offense intended), it just isn't powerful enough to do this in a timely manor. Part of that time is also based on the speed and ability of the PC it is coming from. If you are using Adobe Reader on the PC to print from, there is only one way I am aware of to speed up printing on an old goat like that. There is an option in the print dialog of Adobe Reader that you can select which is called something like, "Print as image". The wording might not be exact, but it is close to that. What that does is it tells Adobe Reader to process the document and convert each page into an image before sending it to the printer (copier). You will have to check the quality of the output is OK with you, but to be honest, I've never really seen any degradation. This should speed up your printing time by quite a bit.
7. I probably should have read the entire post before I started replying I guess. This might still be an issue with the cleaning blade. Could also be an issue with the DR Blade gap if you removed (or loosened) the three screws attached to the metal "bar" that goes across the top of the magnetic roller in the development unit. The "blade" is has a factory calibrated gap to let only a certain amount of toner past it on that mag roller. Too much toner/developer on the mag roller and it will start to touch the drum surface. You will end up with dirty copies and eventually will lead to surface damage on drum.
8. 2557 brings us right back to toner concentration error. At this point I'm going to make and educated guess that there is too much toner in the developer mix. These machines have a known issue when they get old that causes the machines to add too much toner of the developer. In the toner addition drive unit, there is a foam pad used for noise dampening that breaks down with age and gets sticky. There is a solenoid which engages and causes the toner add mechanism to rotate and add the toner to the developer as it's used up. The solenoid is only supposed to activate momentarily causing the toner add to make one rotation at a time. The solenoid gets stuck to the now sticky foam pad and doesn't return, which allows the toner add to keep on rotating and adding way more toner then it should have. The fix is really simple, just removed the pad and glue from the metal frame of the assembly. Once removed, you might now hear a slight clicking noise each time the machine adds toner, but it would work properly at least. Unfortunately, this assembly is a bit of bear to get to and get out of the machine. It requires fairly extensive disassembly.

Check out this thread here: bizhub 250 TCR issue C2557
There is some information in it that pertains to #8 above. I have a picture in my post in the thread which shows the assembly I'm referring to, though it's already out of the machine at that point.

Cool, thanks!

2. Okay, did the recalibration. We'll see how that helps. The touch panel has been working fine for a few days now. It will probably soon quit for a few days.
3. It probably wasn't a full quarter cup, maybe a few tablespoons. But then I spill more every time I take it out to try something on it. How much can you spill? I didn't clean that filter thing and it was filthy, so I cleaned it.
8. So, I will next try finding and taking out that part to clean the foam off of it. There is no shortage of disintegrating foam in this machine. Do I need to replace the developer again after that?

Thank you for all your help!

[Albonline]

Re: Bizhub 350 - Multiple issues

Wow... OK, lets see if I can shed some light on any of this.

1. 2557 - Toner density error. The percentage of toner mixed in with the developer is incorrect (Irrelevant as you've changed this now)
2. Known issue. It's actually just the touch portion of the panel, not the entire assembly. The conductive glue breaks down over time and it stops responding. Just the touch panel can be purchased separately and replaced. Not overly difficult, and sounds like something you could handle. With your current one being finicky, it might need to be calibrated. Not too difficult to do. On the right side of copier, just in front of where the network cable plugs in is a small removable cover. Inside that cover is a small push-button. This is the reset button. Press this in momentarily, then watch the display. Look for a small dot to appear in the upper right? (might be left?) corner. When you see that press the #3 on control panel. It will prompt you far a password, which if my memory serves me correctly is the number 0 eight times. In the menu that comes up will be touch panel adjustment. It's pretty self explanatory, press the + symbols on the touch screen. I can't recall if it reboots itself afterward or not. If not, exit out as far as you can, and then reboot with the main power switch in the back left of the machine.
3. 1/4 cup sounds like a lot, that would have been one pretty good sized pile. I'm guessing it was less, but if things were working afterwards, which it sounded like they wereI guess , I wouldn't worry about it. One bit of advice: if you didn't do it at the time of the developer change, be sure to clean out the toner filter that is found on the back side of the development unit. It's just a flat filter held on by a rectangular plastic frame that snaps on. Single hook on the bottom, 2 tabs on the top when you go to reinstall it.
4. Aside from the 10 second wait, everything sounds perfect there. Generally I hit the F8 button right away after closing the side door, as sometimes an error code will pop up if you wait too long. If things ran for a while and you didn't see an error come up, you should be fine.
5. It sounds like you bought a rebuild kit for the drum, instead of a new (impossible to find these days) or an already rebuilt drum. The smudges were almost certainly caused by a lack of lubrication on the new cleaning blade and/or drum. In the old days a fine white powder was applied to the drums and cleaning blades so the blade wouldn't stick to the smooth drum surface and chatter/vibrate or even flip backwards. Later on they started using toner as a lubricant. I'm guessing you didn't put anything on either, which is why you had the streaks. Eventually you ran enough pages through the machine and got enough toner onto the blade to allow it glide over the drum smoothly.
6. Ah, PDF problems. PCL is the driver you want to use. Unfortunately due to the immense amount of data contained in a PDF that needs to be processed and convert to something the copier can understand, and the fact that the copier is old as dirty (no offense intended), it just isn't powerful enough to do this in a timely manor. Part of that time is also based on the speed and ability of the PC it is coming from. If you are using Adobe Reader on the PC to print from, there is only one way I am aware of to speed up printing on an old goat like that. There is an option in the print dialog of Adobe Reader that you can select which is called something like, "Print as image". The wording might not be exact, but it is close to that. What that does is it tells Adobe Reader to process the document and convert each page into an image before sending it to the printer (copier). You will have to check the quality of the output is OK with you, but to be honest, I've never really seen any degradation. This should speed up your printing time by quite a bit.
7. I probably should have read the entire post before I started replying I guess. This might still be an issue with the cleaning blade. Could also be an issue with the DR Blade gap if you removed (or loosened) the three screws attached to the metal "bar" that goes across the top of the magnetic roller in the development unit. The "blade" is has a factory calibrated gap to let only a certain amount of toner past it on that mag roller. Too much toner/developer on the mag roller and it will start to touch the drum surface. You will end up with dirty copies and eventually will lead to surface damage on drum.
8. 2557 brings us right back to toner concentration error. At this point I'm going to make and educated guess that there is too much toner in the developer mix. These machines have a known issue when they get old that causes the machines to add too much toner of the developer. In the toner addition drive unit, there is a foam pad used for noise dampening that breaks down with age and gets sticky. There is a solenoid which engages and causes the toner add mechanism to rotate and add the toner to the developer as it's used up. The solenoid is only supposed to activate momentarily causing the toner add to make one rotation at a time. The solenoid gets stuck to the now sticky foam pad and doesn't return, which allows the toner add to keep on rotating and adding way more toner then it should have. The fix is really simple, just removed the pad and glue from the metal frame of the assembly. Once removed, you might now hear a slight clicking noise each time the machine adds toner, but it would work properly at least. Unfortunately, this assembly is a bit of bear to get to and get out of the machine. It requires fairly extensive disassembly.

Check out this thread here: bizhub 250 TCR issue C2557
There is some information in it that pertains to #8 above. I have a picture in my post in the thread which shows the assembly I'm referring to, though it's already out of the machine at that point.

if you do disassemble to repair be carful or the screws in the solenoid, you wouldn't believe how many times i had to go refix this problem due to the wrong screws being used. by the field techs.

[femaster]

Re: Bizhub 350 - Multiple issues

Cool, thanks!

2. Okay, did the recalibration. We'll see how that helps. The touch panel has been working fine for a few days now. It will probably soon quit for a few days.
3. It probably wasn't a full quarter cup, maybe a few tablespoons. But then I spill more every time I take it out to try something on it. How much can you spill? I didn't clean that filter thing and it was filthy, so I cleaned it.
8. So, I will next try finding and taking out that part to clean the foam off of it. There is no shortage of disintegrating foam in this machine. Do I need to replace the developer again after that?

Thank you for all your help!

Unfortunately there is a good chance that the control panel you bought probably is developing the same issues that your original had. Like I said, I know there are units available out there as replacements. The part number is: "4040 7809 01". If searching you may need to search with or without the spaces. The original parts book does contains the spaces in the part number.

Once the issue with the toner add unit is corrected, the best idea would be to replace the developer again as it is certainly over-toned at this point. While I have had success in the past with dropping the toner levels in the developer down to "normal", it is quite the process and in the end isn't guaranteed to work or even deliver a decent quality result. Personally your best bet would be to just replace it again to guarantee that it's where it needs to be.

Do you happen to have a service manual for your machine? It would help you immensely with getting that toner add unit out. I, or one of the others on here, might be able to help you out with that if you do not.

[GinaTallmanCPA]

Re: Bizhub 350 - Multiple issues

Unfortunately there is a good chance that the control panel you bought probably is developing the same issues that your original had. Like I said, I know there are units available out there as replacements. The part number is: "4040 7809 01". If searching you may need to search with or without the spaces. The original parts book does contains the spaces in the part number.

Once the issue with the toner add unit is corrected, the best idea would be to replace the developer again as it is certainly over-toned at this point. While I have had success in the past with dropping the toner levels in the developer down to "normal", it is quite the process and in the end isn't guaranteed to work or even deliver a decent quality result. Personally your best bet would be to just replace it again to guarantee that it's where it needs to be.

Do you happen to have a service manual for your machine? It would help you immensely with getting that toner add unit out. I, or one of the others on here, might be able to help you out with that if you do not.

Hi femaster,

I found a service manual here, but I got to step 11 of 13 on removing the toner replenishing drive unit (I think that's the thing you're talking about), but I think the manual fails to mention that you have to take off the rear panel to reach two of the screws. I can't get the rear panel off with the screwdrivers I have right now, so I am going to see if I can find one that will work at home tonight. If you have a chance take a peak at step 11 on page 113 and let me know if I'm correct that I can't reach the two screw in the little popout image from the front of the machine. I also don't know how to remove the two connectors it talks about.

Back to work I guess.

Gina

[Albonline]

Re: Bizhub 350 - Multiple issues

Unfortunately there is a good chance that the control panel you bought probably is developing the same issues that your original had. Like I said, I know there are units available out there as replacements. The part number is: "4040 7809 01". If searching you may need to search with or without the spaces. The original parts book does contains the spaces in the part number.

Once the issue with the toner add unit is corrected, the best idea would be to replace the developer again as it is certainly over-toned at this point. While I have had success in the past with dropping the toner levels in the developer down to "normal", it is quite the process and in the end isn't guaranteed to work or even deliver a decent quality result. Personally your best bet would be to just replace it again to guarantee that it's where it needs to be.

Do you happen to have a service manual for your machine? It would help you immensely with getting that toner add unit out. I, or one of the others on here, might be able to help you out with that if you do not.

A11UM70100 try this panel . its from the 2 series, lasts longer and looks about the same except for it having black frame instead of grey. btw its half the cost.

[femaster]

Re: Bizhub 350 - Multiple issues

Hi femaster,

I found a service manual here, but I got to step 11 of 13 on removing the toner replenishing drive unit (I think that's the thing you're talking about), but I think the manual fails to mention that you have to take off the rear panel to reach two of the screws. I can't get the rear panel off with the screwdrivers I have right now, so I am going to see if I can find one that will work at home tonight. If you have a chance take a peak at step 11 on page 113 and let me know if I'm correct that I can't reach the two screw in the little popout image from the front of the machine. I also don't know how to remove the two connectors it talks about.

Back to work I guess.

Gina

Sorry about the late reply, I haven't been able to get on in a few days. I'm hoping that by now you have managed to get the unit out, but just in case...

Yes, the 2 screws it refers to in the small popout image are located in the back of the machine. You will need to remove the rear cover, but in order to do so you will also need to remove the rear/top center plastic piece located between the RADF mounting hinges in order to access a few of the screws to remove that back panel. At the same time, you will probably want to also remove the plastic trim panels on either side of the scanner bed since at that point they will probably want to fall of the copier anyway since the removed plastic panel is all that holds them on.

As for the connectors, if I remember correctly those can be a bit hard to get to. They are essentially 2 pieces of wire harness held together with a plastic connector. It's been some time since I've pulled all that apart, so unfortunately I'm not sure if I can be much help explaining it in detail. They harness should come apart on one side of the connector or the other. Apply a firm and even pulling force to the harness and things should come apart for you. sometimes they can be a bit of a bear to get apart and other times it's pretty easy. Don't give up!

[femaster]

Re: Bizhub 350 - Multiple issues

A11UM70100 try this panel . its from the 2 series, lasts longer and looks about the same except for it having black frame instead of grey. btw its half the cost.

Good call on that. The 2-series didn't even cross my mind. I suppose in the back of my mind I assumed they would have been the same part number. Another lesson on why people shouldn't assume things.

[GinaTallmanCPA]

IMG_0015.jpg

Re: Bizhub 350 - Multiple issues



Sorry about the late reply, I haven't been able to get on in a few days. I'm hoping that by now you have managed to get the unit out, but just in case...

Yes, the 2 screws it refers to in the small popout image are located in the back of the machine. You will need to remove the rear cover, but in order to do so you will also need to remove the rear/top center plastic piece located between the RADF mounting hinges in order to access a few of the screws to remove that back panel. At the same time, you will probably want to also remove the plastic trim panels on either side of the scanner bed since at that point they will probably want to fall of the copier anyway since the removed plastic panel is all that holds them on.

As for the connectors, if I remember correctly those can be a bit hard to get to. They are essentially 2 pieces of wire harness held together with a plastic connector. It's been some time since I've pulled all that apart, so unfortunately I'm not sure if I can be much help explaining it in detail. They harness should come apart on one side of the connector or the other. Apply a firm and even pulling force to the harness and things should come apart for you. sometimes they can be a bit of a bear to get apart and other times it's pretty easy. Don't give up!

Ok! I finally got back to this project. Tax season kicked my ass this year. I have got the thing disassembled, and I found a part with a disintegrating foam pad on it, but I am not sure it’s the same part you mentioned. See the attached picture. Do I have the right thing or do I need to keep digging? Thanks!

[femaster]

IMG_0015.jpg

Ok! I finally got back to this project. Tax season kicked my ass this year. I have got the thing disassembled, and I found a part with a disintegrating foam pad on it, but I am not sure it’s the same part you mentioned. See the attached picture. Do I have the right thing or do I need to keep digging? Thanks!

You are VERY close. I believe what you are looking for is right next to the part you have out. The unit you need to remove is what drives the unit in your picture. The following image shows what you are looking for. You will need to remove it in order to get to the pad that is sticky.

image.png

Once removed, you will need to remove the solenoid assembly from the frame on the unit, and you will find the pad that needs to be removed on the BACK SIDE of the tab that the green arrow is pointing to. Remove the pad, clean up any left over glue or residue, and reassemble the machine. You will hear a light clicking noise every time the machine cycles to add toner, but I'd rather have that then the machine constantly adding too much toner.

image_44759.jpg

[Albonline]

Be careful of what screws go back into the solenoid. short ones, standard length screws will short out the coil.