jam 454

[David Beck]

Hi guys, I have a black 454 that always gets stuck on the first double-sided print, but the others print normally.

Does anyone know what it could be?

[blackcat4866]

Does "stuck" have a jam code?

[David Beck]

32-01

[femaster]

Remove the 4 sponge/foam noise dampening pads (and any remaining glue residue) that the exit unit gate touches. There are 2 behind the outer gate fins on the exit unit inside the copier, and there are 2 on the reversal unit on the top of the right side access door directly across from the gate. They get sticky over time and the gate sticks to them. A classic sign of the pads on the right side door causing problems is the first duplex job of the day jams and then subsequent ones work fine.

Both #7s in image below of reversal unit:
image.png
And number 10 in the exit unit below. This is a newer version on the parts book, so there is most likely another pad on the opposite end of part #14 this this diagram doesn't show.
image.png

[blackcat4866]

In situations where the first page of the day jams, especially duplex, it's because of condensation on the fuser guides during the initial warmup of the machine. That condensation evaporates in a relatively short period of time with the machine ON and the fans running. There is usually an environmental factor. The best way to catch this is to show up for the first call at this customers location. Ask them to leave the machine OFF until you arrive. Take a temperature and humidity reading before starting:

hygrometer.jpg

Warm up the machine and print. Check for condensation on the fuser guides. I have had customers that turn down or turn OFF the AC at night, so the temperature is high, and humidity high first thing in the morning, until the AC has run for a while. I have also seen the top few pages of each tray jam for the same reason. This particular problem is more common in the spring and fall, when the heat or AC is not ON consistently.

[SAR]

It's probably the exit gate solenoid(part # A161R72644). There are other fixes to modify that solenoid that are listed in this forum, but if you just replace it, you will be good to go.

[copyman]

Remove the 4 sponge/foam noise dampening pads (and any remaining glue residue) that the exit unit gate touches. There are 2 behind the outer gate fins on the exit unit inside the copier, and there are 2 on the reversal unit on the top of the right side access door directly across from the gate. They get sticky over time and the gate sticks to them. A classic sign of the pads on the right side door causing problems is the first duplex job of the day jams and then subsequent ones work fine.

Both #7s in image below of reversal unit:
image.png
And number 10 in the exit unit below. This is a newer version on the parts book, so there is most likely another pad on the opposite end of part #14 this this diagram doesn't show.
image.png

Agree with the gate being stuck to foam pads. Makes sense after sitting all night they are stuck, once used good for rest of day. Remove foam pads as femater suggested. I've removed these pads many times.

[David Beck]

I've already changed the fuser and complete output assembly but it still jams on the first page, I can send a job and it doesn't do the first double-sided without jamming and that happens at any time of the day, I tested other drivers to see if that was the case but even so it always jams on the first double-sided print

[femaster]

I've already changed the fuser and complete output assembly but it still jams on the first page, I can send a job and it doesn't do the first double-sided without jamming and that happens at any time of the day, I tested other drivers to see if that was the case but even so it always jams on the first double-sided print

Did you remove the foam pads as was suggested? That is the cause most of the time.

[David Beck]

Did you remove the foam pads as was suggested? That is the cause most of the time.

yes

[Albonline]

is the door square to the main body and closing all the way?

[David Beck]

is the door square to the main body and closing all the way?

yes

[Albonline]

the only other thing i've seen with this problem turned out to be the motor not starting fast enough. there is an outside chance that the 2nd feed roller is binding slowing the lead edge of the first page also. timing for jams is much tighter when duplexing.

[tsbservice]

Gate solenoid mode should work.