I had never gotten this error on a M477. I saw in another thread that someone said the only way to get rid of it was replace the ITB. I took the ITB out to look at it and see if there was anything that I could fiddle with. I put it all back together, and now the prints are completely blank. I can't think of what I could've done, but it probably has something to do with the ITB. I put it away the exact opposite of how I took it out. There aren't a whole lot of things to unplug.
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Re: Color Laserjet M477 59.f0
Zeldaman is absolutely correct. I'm attaching the pertinent files since this is problematic for A LOT of people and should not be contained to only certain people.
Hopefully this link works.Comment
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Re: Color Laserjet M477 59.f0
Any idea why my pages would suddenly go blank?Comment
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Re: Color Laserjet M477 59.f0
This belt is tricky. The part that got me on my first one were the "levers" above the power supply. Did you put those back in the correct positions? You re-connected the two rear connectors?
I've replaced 3 or 4 of these on the single-function (M452) under warranty.Comment
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Re: Color Laserjet M477 59.f0
I believe I got them in the right place... you push kind of hard until they click, then you have to push up until the click again.
Yeah--and there's those two plugs, which I checked. I was hoping someone had this happen to them and could give me a clue.Comment
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Re: Color Laserjet M477 59.f0
The levers pull down, then, pull slightly out when removing, then push slightly back in and back up when reinstalling. I was afraid I was going to break them as much force as you need to exert to unclip and clip them. Secondary transfer assembly flush?Comment
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Re: Color Laserjet M477 59.f0
You'll have to remove the belt again. On the right side of the belt, the side above the power supply there's 2 slots/openings that the white plastic guides you moved out of the way to remove the belt fit into. You can fit a flat screwdriver into each one and turn clockwise and a lever will move back and forth on the belt, position the levers in the back position before reinstalling the belt. You'll know they're in the correct position because the plastic guides will fit back in place without issue. Hope this helps, sorry if my directions are hard to follow it's a little difficult to describe.Comment
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Re: Color Laserjet M477 59.f0
Thanks--I didn't see this response till today. Unfortunately, this machine has already been given up on.
But that's good to know.Comment
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Re: Color Laserjet M477 59.f0
Is this firmware a preventative measure as well, or only to recover from the error? My customer has 3 other machines of this type and I'd like to get ahead of it if this is such a common problem.Comment
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Re: Color Laserjet M477 59.f0
I'd say preventative. Have replaced 3 of these belts under warranty on the single-function model (M452) for the same error.Comment
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Re: Color Laserjet M477 59.f0
These machines are utter bags of shit. We got one back clicking on black dev drive, got replaced under warranty, the replacement machine went out in the field did 8k came back with a fucked fuser.
Claimed warranty on the replacement.Comment
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Re: Color Laserjet M477 59.f0
This ^^^^^^^ was exactly what I needed to fix mine! I'm in Tech Support for over 160 techs in the field for my company. Mine was printing only black. Engine test, Demo Page, Supply Status page, print jobs, etc... only print black. No color at all, but the secondary transfer roller is getting covered with cyan toner. A previous tech had replaced the transfer belt unit and it worked just fine for about a week, but then color dropped out. I went straight for the transfer belt since that was the last thing touched and found that one of the two locking pins above the power supply was not locked in the up position. I pulled the transfer belt to clean up the machine and reinstalled it, verifying that the pins were completely locked in the up position. I got the same results. Prints only black. I knew it had to be something to do with the pressure position of the belt but couldn't find any reference to the correct position of the two mechanisms in the belt. one for black and one for the three colors. LATechnico!! your post gave me the info that I needed. It is very touchy and easy to knock that belt unit out of position. I'm surprised this doesn't happen more often. Perhaps it does. I took a pic of the correct belt pressure positions for install and am sharing it here. There are some raised marks that you can use to make sure everything is in the correct position. I rotated each coupler clockwise until it hit the correct position, but then it would jump a bit past it, so I then changed to counter-clockwise and turned very slowly. You can feel it drop into position if you pay attention. I marked the raised marks with black sharpie so they can be easily seen in the pic. There are two pressure mechanisms in the belt. One for black and one for the three colors. Each mechanism is rotated by the machine through a + shaped coupling. Each pressure mechanism has three raised marks that must be aligned properly before installing the belt in the machine. You can see these marks in the pic because I "sharpied" them. When these marks are aligned properly, the + shaped coupling should be straight up and down. Not rotated off center at all. At this point, handle the transfer unit carefully and insert it into the machine. To be sure nothing falls out of position, move the locking pins in and up to their locked position right away after installing the belt. Then go back and insert the two connectors and screw the two locks down under the fuser.
Hope this helps.....
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