I've got a low-miles (15,000 clicks) Bizhub C452 that is kicking my ass. Machine is throwing constant C8104 codes because the glass assembly is unable to reach home position. A previous tech had tried swapping the motor from another working machine and it worked...for 100 copies.
Today I removed all the covers, the platen, the glass movement assembly, both belts, the motor, gears, shaft, and collar. Also inspected the wires for any breaks, per the KM bulletin, and reseated all connections to PWB-ID. Before reassembly, I cleaned each and every part, reapplied grease, and checked movement for any friction or blockage. Nothing. I partially reassembled the Original Glass Assembly, loosely installed the scraper and top cover/ramp, basically just enough to run paper through the ADF. For some odd reason, it worked after assembling it this far. I was able to run ~250 pages (mostly 1 and 2 page jobs, some longer runs as well) without issue. I even cranked the Split Line Detect up to the maximum sensitivity to force the Glass Movement to be more active. It passed all of my stress-testing, so I began to install the covers. After installing all the covers and reattaching the finisher, I restarted the machine....C8104 after warmup.
"Alright", I say: "it's obviously the covers impeding movement of the glass assembly". Remove all of the covers in the area, including the scraper, to alleviate any added friction...still C8104. After resetting the code each time, the Glass Assembly attempts to briefly unblock, then reblock the home position sensor. At present, the motor is only making a tiny "pulse" in the direction of unblocking: not nearly enough to even move the glass a millimeter. The strange thing is that the motor feels "locked" when it is attempting to move out of home: it is very difficult to rotate the motor shaft by hand, even when the motor has been removed from the drive assembly.
I am at a loss. Everything looks perfectly pristine. Rather than aggravate myself any further, I have ordered the PWB-ID, another M202, as well as a complete Original Glass Movement Assembly. With that being said, it still annoys me that I can't figure out why this is happening. The customer is (understandably) angry that their new machine is having issues, so I'm still hoping to get it fixed before the parts arrive.
Any ideas?
Today I removed all the covers, the platen, the glass movement assembly, both belts, the motor, gears, shaft, and collar. Also inspected the wires for any breaks, per the KM bulletin, and reseated all connections to PWB-ID. Before reassembly, I cleaned each and every part, reapplied grease, and checked movement for any friction or blockage. Nothing. I partially reassembled the Original Glass Assembly, loosely installed the scraper and top cover/ramp, basically just enough to run paper through the ADF. For some odd reason, it worked after assembling it this far. I was able to run ~250 pages (mostly 1 and 2 page jobs, some longer runs as well) without issue. I even cranked the Split Line Detect up to the maximum sensitivity to force the Glass Movement to be more active. It passed all of my stress-testing, so I began to install the covers. After installing all the covers and reattaching the finisher, I restarted the machine....C8104 after warmup.
"Alright", I say: "it's obviously the covers impeding movement of the glass assembly". Remove all of the covers in the area, including the scraper, to alleviate any added friction...still C8104. After resetting the code each time, the Glass Assembly attempts to briefly unblock, then reblock the home position sensor. At present, the motor is only making a tiny "pulse" in the direction of unblocking: not nearly enough to even move the glass a millimeter. The strange thing is that the motor feels "locked" when it is attempting to move out of home: it is very difficult to rotate the motor shaft by hand, even when the motor has been removed from the drive assembly.
I am at a loss. Everything looks perfectly pristine. Rather than aggravate myself any further, I have ordered the PWB-ID, another M202, as well as a complete Original Glass Movement Assembly. With that being said, it still annoys me that I can't figure out why this is happening. The customer is (understandably) angry that their new machine is having issues, so I'm still hoping to get it fixed before the parts arrive.
Any ideas?
Everyone has the right to be stupid. Some people just abuse this privelage more than others
Comment