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KM BizHub 423 - Grinding Noise leading to auto-shutoff
KM BizHub 423 - Grinding Noise leading to auto-shutoff
I am new to copier maintenance. I bought a KM BizHub 423 about 10 years ago, gently used. It was regularly serviced by a professional, but during COVID my business sector went mostly digital, and the copier ended up getting little to no use. The copier has not been professionally serviced since about 2021. It has about 300000 "miles" on it.
About two years ago, it started saying that I needed to replace the drum and developer. I used Youtube videos to figure out what to do, bought the parts, and replaced the developer unit, developer, and drum. After that, ran fine-albeit with light use-from about late 2022 or early 2023 to now.
I recently had a couple of now-rare, and unusually large (probably close to 10000 pages each), copy jobs. About two months later the copier started making a grinding noise when it is printing. It does this both when making copies and when printing documents, so I am sure it does not have anything to do with the ADF or the copier parts.
It did this for about a week. I poked around it, and started directing even small print jobs to another printer in the office. About four days ago, the printer control panel started saying something like "replenishing toner" while making that same grinding noise. It will do this for a minute or two and eventually shut off its own power.
The noise sounds like it is coming from directly above the top paper tray. When I imagine it in my head, it sounds like something fell into some set of gears.
I opened up plastic cover where the copies are accumulated to see whether I could narrow that down some. Nothing seemed out of place, hot, broken. There were no shavings, lubricant, or anything that I would consider were signs of improper mechanical wear.
I pulled the toner drawer out to see whether that was the part grinding. The exact same sound remained. It appears to be coming from under the area where the toner drawer slides into place.
What should I look at next? Also, is this copier worthy of rescue if it needs repairs? It has been very good to me over the years.
I'm personally not a fan of this model . Another thing to think about this machine hit end of life 09/2024. With that being said I wouldn't put any money in to it
The noise is from toner btl drive assembly or toner bottle in wrong. Very common issue. The gear(s) that turn bottle break.
Try this, remove toner btl and run the machine. If no noise wait until machine stops and put toner btl in with hole facing up at 12 oclock position. If still noise with btl out then the gear(s) broken inside toner btl drive assembly. See attached bulletin. The toner btl drive assy unit isn't that hard to replace. Get the service manual and follow step by step instructions. If you make a small donation to this website myself or someone will send you the service manual.
Thank you all for posting! Before I got responses, and because of my nearly uncontrollable need to know what is going on, I had already done some of the troubleshooting that I needed to do. I took a pic of the part that is making the noise, attached.
One of the photos is just the zoomed in version of the other. I circled the (badly lit) area showing the pinion that seems to be making the most noise. I can force the gears to move, but there is a lot of resistance. The seem to move some sort of conveyor belt underneath the hole where the toner bottle dumps into the rest of the machine (the fuser?). If I move it enough, it will then make about three or four copies before it starts making the grinding noise again.
Given the general combination of responses from all of you, I am thinking I will try to get out of this cheaply with a DIY remedy, after I send a small donation per copyman's recommendation.
Also, note to all: I know that there's a ton of loose toner in there. I managed to spill it while trying to figure out how everything worked under there. I need to bring a vacuum from home so that I don't end up spreading it all over the office.
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You are on the right track. They are the toner hopper gears. Not the gears in bulletin I posted but check them when you have apart.
Be careful using regular vacuum to pick up toner, the toner will blow right through most vac filters because of toner being such a fine particle. Also toner has static and there have been cases of household vacs blowing up from static discharge!
I'm personally not a fan of this model . Another thing to think about this machine hit end of life 09/2024. With that being said I wouldn't put any money in to it
It's the best BW A3-MFP, for me, EVER!
Word any money to invest in it, even after market parts.
For the consumables, toner & developer, perhaps better OEM.
All the rest after market. We are doing it since day one of these machines
and are still having loads in the field.
Yet further confirmation to maybe try a DIY repair on this old copier of mine!
Speaking of which, I have another DIY question before I start this endeavor. It's left over from my days taking apart old CRT TV sets.
While I understand generally what is going on in a laser printer (which is what this really is at its heart), there is a lot more in this machine than just a laser printer.
My question to you all: is there a big old, heart-stopping capacitor (or some other life-threatening part) in there that I should be worried about when I start messing around in this copier's guts?
Yet further confirmation to maybe try a DIY repair on this old copier of mine!
Speaking of which, I have another DIY question before I start this endeavor. It's left over from my days taking apart old CRT TV sets.
While I understand generally what is going on in a laser printer (which is what this really is at its heart), there is a lot more in this machine than just a laser printer.
My question to you all: is there a big old, heart-stopping capacitor (or some other life-threatening part) in there that I should be worried about when I start messing around in this copier's guts?
As long as machine is unplugged it is safe. I still have habit to avoid touching any caps on pwr supply in case of residual voltage. Not like the old TV's and the dangerous capacitor.
ive never gotten zapped from an unplugged copier.
i have flew across a room with the help of 700+V from the hv i leaned my forearm against, but that was a running machine.
i was testing voltages and boy did i find some.
We know a thing or two because we've seen a thing or two.
The medication helps though...
Hansoon, I just noticed your signature line! I built a 286 in 1991. It was already obsolete but I didn't have the money for a 386, much less a 486, which was pretty new at the time.
I was doing side work for the father of an ex-girlfriend at the time (he had recently left the employ of IBM and started his own IT company). I took a copy of his Computer Shopper magazine and spent a week pricing out and ordering parts. He let me plunder his stash of retired equipment to keep costs down, so I got a hard disk and a VGA card out of an old XT clone. It turned out that the VGA card had a bunch of unused memory sockets and I was able to load that up cheaper than buying a 386/33 system. The AT had a "turbo" button that made it run at the blistering speed of 12 MHz. All the memory on the VGA card made it run games nearly as well as a 386.
I used that AT for nearly all of college, upgrading to a 486/66 just before I graduated. In retrospect, I wish I kept it because it had a bunch of fun games on it, including one of my all-time favorites: Descent.
I used that AT for nearly all of college, upgrading to a 486/66 just before I graduated. In retrospect, I wish I kept it because it had a bunch of fun games on it, including one of my all-time favorites: Descent.
A bit off topic, but...
You must have heard of the Internet Archive? Go ahead, play that old game! It must be one of these I'm assuming:
Descent Anniversary Edition : Free Download, Borrow, and Streaming : Internet Archive
A Ricoh Service Tech for 7 year. A Konica Minolta Service Tech for 7 years. Now, KM service manager for 4 years.
My Ricoh knowledge is slowly dwindling away at this point. Many things have been lost to time...
A favorite resort of the foreign residents of Yokohama during the summer months is the island of Enoshima. It is about twenty miles away, and is a noted place of pilgrimage for the Japanese, on account of certain shrines that are reputed to have a sacred character. Doctor Bronson arranged that his party should pay a visit to this island, as it was an interesting spot, and they could have a glimpse of Japanese life in the rural districts, and among the fishermen of the coast. "But as we are in for it," he continued, "we must make the best of the situation, and hope to go through in safety. Many a strong ship lies at the bottom of the sea, where she was sent by just such a storm as we are about to pass through, and many another has barely escaped. I was once on a ship in the China seas, when the captain told the passengers that it would be a miracle if we remained half an hour longer afloat. But hardly had he done speaking when the wind fell, the storm abated, and we were safe. The typhoon is to these waters what the hurricane is to the West Indies; it is liable to blow at any time between April and September, and is often fearfully destructive. OPIUM-PIPE. OPIUM-PIPE. "Surely your ladyship knows Dr. Bruce!" Hetty said with a vivid splash of colour on either cheek "A little time ago I understood that Dr. Bruce----" "I require that everywhere a strict investigation shall take place into the conduct of the soldiers with regard to the life and property of the civilian population. "Where were they buried?" They all pressed forward. "Count out. That's the only fair way," shouted the boys in the center. "Now, there's three loaves o' bread for the Sargint," said Harry, laying them down on a newspaper. "There's three for the Corpril; there's three for me; there's three for you." "'T?un't peas, thick 'un," Vennal would break in uproariously, "it's turnips—each of 'em got a root like my fist." At this moment of perplexity, some medicine, that she had obtained from Edith, occurred to her, and, with a feeling of confidence, and almost of extacy, she took a phial from a shelf in a cupboard where she had placed it, and, pouring out the contents in a large spoon, hesitated an instant ere she administered it. "Let me see," said she; "surely it was a large spoonful Edith told me to give—yet all that was in the phial doesn't fill the spoon. Surely I can't be wrong: no—I remember she said a large spoonful, and we didn't talk of any thing else—so I must be right." But Mary still hesitated, till, hearing a sudden noise in the court-yard, which, she conjectured, was her mistress returned, and as the child was getting worse every moment, she leaned back its head, and, forcing open its mouth, compelled the patient, though with difficulty, to swallow its death. The draught was taken; the rigid muscles relaxed, and for a minute the child lay motionless in her lap; but in an instant after, Mary could scarcely suppress a shriek at the horrid sight that met her gaze. The eyes opened, and glared, and seemed as if starting from the head—the fair face and the red lips, were blue, deepening and deepening, till settling in blackness—the limbs contracted—the mouth opened, and displayed a tongue discoloured and swollen—then came a writhing and heaving of the body, and a low, agonized moan: and, as Mary looked almost frantic at this dreadful sight, Edith's words, when she had given her the phial, "that there was enough there to kill," suddenly occurred to her—and then, too, came, with a dreadful distinctness, the remembrance of the true directions which Edith had given. It was nearly noon the next day, when the under-sheriff entered the room to ask if their opinions were yet unanimous. The galleyman still refused. "That for ye, coward," said Tyler, striking him with the flat side of his bared weapon. Oakley aimed another thrust which was again turned aside, and the smith, now flinging down his sword, seized upon his right hand and wrenched the dagger from its grasp. After a short struggle, Oakley fell heavily on the pavement with the blood streaming from his mouth and nostrils. HoME萝拉泷泽第4部资源
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