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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
>>I have this weird problem with a Bizhub 423. At every print from tray 1, the paper jams, sometimes at the first sheet, sometimes after a few sheets. Always jam code 3001. 537K copies on the machine. I have found a similar thread here, and it mostly points to the paper exit assembly cable/connectors or the wrong type of paper feed assembly used for tray 1. I have checked the imaging unit, registration unit, fixing unit, paper transport, it all looks perfect, one of the best looking machines I've worked on, minimal to inexistent wear, nothing wrong mechanically.<<
You haven,t changed this part as far, and problem still exist.
>>have checked the imaging unit, registration unit, fixing unit, paper transport, it all looks perfect<< maybe looks fine, but works wrong.Comment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
Nothing new on the internet. Here ya go buddy:
2022-03-19 15_48_00.jpgComment
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“ Sent from my Intel 80286 using MS-DOS 2.0
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
What will happen if you try bypass tray will it jam?A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
Blessed are they who can laugh at themselves, for they shall never cease to be amused.Comment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
Reading what I said would help a lot more. But it's ok, I have decades on the internet, and it is always the same. I repeated 4 or 5 times everything that I checked and replaced. Sometimes in bold. Other times in a list. Then there are quotes of what I said, repeating what I said even more.
And then you have some wise guy going "Hey, have you tried replacing THAT?" REALLY? How would YOU react?
Not cool...Comment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
Please stay on topic...there is really no need of snarky comments.
Check this post about cutting some cable ties, also can you confirm first tray paper feed unit is right one for bh423 as femaster already said feed unit from slower models won't work propely here.
A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
Blessed are they who can laugh at themselves, for they shall never cease to be amused.Comment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
I'm pretty sure you had already confirmed the correct feed units were in the machine (though I'm too lazy to go back and look for sure), but to answer your question:
Yes it could cause a jam because the conveyance sensor on the tray 1 feed unit would be incorrect, and anything coming out of any of the trays would have to pass the sensor on the tray 1 feed unit. Incorrect sensor = JAM.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...Comment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
I didn't read the whole thread - time consuming.....
I would suggest action in this order:
-Confirm 1st feed assembly is correct one
-replace registration clutch and check (or replace) pre-reg sensor.
-replace registration roller (black one) and registration bushings (x4)
I had lots of J30-01 always registration clutch was the problem.
10 years ago I swapped 1st feed assembly from bh 423 to bh 283.
Bh 283 was running fine but 423 jamed randomly. Don't remember the code.
Learned that lesson very well.Comment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
I finally found the correct tray 1 feed unit with the optical sensor. Same problem. Now tray 1 lift motor died as well.
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
I am stepping up the game and using a multimeter and I also ordered a 24V power supply to test stuff like motors and clutches.
I measured the connector, comparing to the tray 2 motor output, that indeed sees a 24V rise when the command is given. 0V on the connector for tray 1. Flatline. I tried multiple trays, just to be sure, all ok, not bent, not broken.
As I said, this thing's software or boards are most definitely going crazy in some way. I know many people insist on checking the clutches, but 1) they have already been replaced multiple times, and 2) I've seen bad clutches and a machine with a bad clutch doesn't pass 30+ sheets of paper with the perfection of a brand new machine. It stops after 2-3 pages.
From tray 2, the paper stops right in front of the large 2 black rollers on the machine side, then is pushed from behind by the tray paper transport, while also not advancing through those big rollers and being crumpled under the registration section because it is pushed from behind, but blocked by the big rollers not moving. It's precisely as if the board doesn't command the clutch while commanding the tray transport unit. I am adding a picture of the rollers where the paper gets stuck from tray 2. Precisely in the middle of the rollers. The paper is being pushed into them, but they don't rotate even a tenth of a degree.2022-03-28 18_54_07.jpgComment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
Sounds like an electrical problem if clutches not energizing. Or the switch that turns on clutch. If the boards are same as a Biz 223 I should have them if needed.Comment
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Re: Bizhub 423 3001 jam - suspecting wrong tray 1 paper feed assembly
I now have the 24V PSU. I tested all clutches, they all work. Tray 1 motor is fine but it's not getting powered any more when the tray is inserted.
At this point, I am pretty sure that something's wrong with the boards and/or software.Comment
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