MPC 4500 fuser set error

[Wishbone]

I have 2 of these giving me a fusing set error. The connectors are clean on both sides and I can put a fuser from a working machine in either one and works fine so there is something wrong in these fusers. Anyone have any ideas?

[Jomama46]

Are they new fusers or rebuilt? Are they for the copier or for the printer equivalent?

[Wishbone]

these are the copier vesion and both have the original fuser in them. This account has a lot of these machines and I just took one out of a machine that was working and put it in both machines giving me the fuser set error(says it in the display) and it works in both. I can't seem to find a part number for just the connector either.

[rthonpm]

There's a photointerruptor that gets knocked out of place on the left side of the fuser. Ricoh actually issued an updated part for this. The part in the catalogue is GW020020, updated part is AW020190.

[Wishbone]

Yeah that sensor is actually in the copier and not inside the fuser itself. Checked both of those and they are good. This problem is within the fuser housing.

[Guest]

The fuser set message is just receiving a loopback from the fuser connector. Take the connector cover off on the fusers you are having trouble with and pull the connector out of the housing. There is a wire that goes from pin 2 to pin 5 of the smaller connector that is connected into the larger 6-pin fuser connector. This is the fusing set signal for the copier. Im not sure why you would have two of these not reading correctly all of a sudden but check that loopback wire it might have broken or come loose.

[Lagonda]

KISS!!! (Keep it simple stupid) How about a scrap of paper caught in the fuser socket isolating the pins! But I'd put my money on the sensor being knocked loose.

[Wishbone]

The fuser set message is just receiving a loopback from the fuser connector. Take the connector cover off on the fusers you are having trouble with and pull the connector out of the housing. There is a wire that goes from pin 2 to pin 5 of the smaller connector that is connected into the larger 6-pin fuser connector. This is the fusing set signal for the copier. Im not sure why you would have two of these not reading correctly all of a sudden but check that loopback wire it might have broken or come loose.

You got it. After messing with the fusers a while longer today I discovered those two wires singed. Almost burnt through. Maybe this floor of this account had a power surge or something. Spliced the wires and they are working again. Stange one and something to remember.

[Jomama46]

Good catch