The display shows tray 1 is ready to open. There is no LCC installed on the machine. It has the latest firmware. All tray sensors seem to be OK. The cassette is lifted all the way. Any ideas ?
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I've had this a few times now Tony.
If you insert any of the main trays 1 - 4, and it lifts up as normal, but the display says that it is ready to open, there is a sensor in the paper feed unit that is faulty. The lift motor gets signal to start lifting from the paper size detect board on the rear frame when the tray is inserted. This is why the display will show the tray as installed, with a detected paper size, but still says 'ready to open'.
On the paper feed unit, there is a white lever which the tray hits when installed. This white lever drops the PF roller assembly down. The PF assembly has its own sensor inside the paper feed unit. That is the one which goes bad. Parts Guide section 10, item 16 (part updated).
Take the Paper feed unit out, take the top cover off and replace the sensor. Thats all it usually is with that symptom. -
Thanks Wazza !! I checked all the bulletins and didn't find anything for this. Usually you only see that message when an LCC has hit the lower limit switch. Appreciate it !Comment
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No probs mate.
The message is caused by the following factors...
- Tray lifts up OK, as it gets the message that the tray has been installed from the size detect board.
- Tray detects the correct paper size in the tray from the size detect board.
- Tray lifts up and detects the PE sensor OK
- Tray lifts up but doesn't detect the PF roller contact with the paper in the tray.
Therefore, paper size & tray being installed is detected, and the lift motor stops rotating as the PE sensor has lifted the tray to the height of the paper installed in the tray. The message 'Ready to open' is caused by the faulty PF detect sensor.
I've had a few now, and it varies across all the trays, but its the same symptom, message displayed & part required.Comment
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It ended up being the cassette itself. It seems that either that back of the cassette is worn down and causing it to pull away from the sensor just enough.Comment
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Thats weird.
Never heard of a worn tray. There are so many MX's in the field that have have done ALOT of work, meaning the trays have been opened/closed many times and I've never heard of that one.
Nice fix. You learn something everyday!
I suppose your tray 1 was a very high use tray??Comment
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I have a similar issue on MX4501, customer had 'somehow' managed to jam paper in cassette resulting in F3-22 error, reset code & now displaying 'Tray 2 is ready to open'
However the tray is not at fault because swapping the tray with tray 1 & the fault remains with tray 2, but unlike Tony's fault the lift up motor does not do a thing, yet the machine does reckognise paper tray inserted & paper sizes. All firmware updated as per Sharp Tradenet. Suggestions appreciated. Thanks. Kev.Comment
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Kev, I was going to update this for Wazza. The error did come back and it was the shafts on the lift up units that were twisted. I've seen that on other machines, but like you said, we always got an F3-12 or 22 or whatever tray it was. In this case we weren't getting the error code, just showed it was ready to open.Comment
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Cheers for the response Tony, I am back on site tomorrow so I wil take a look at the shafts, sounds likely as the customer had jammed the cassette.Comment
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So it wasnt the tray being damaged then Tony. I knew it would be a very rare case if it was the tray.
The lift motors have been upgraded many times, with different shaft plastics, enabling it to be stronger, preventing shaft twisting. My experience is that even with the very latest part number, they still can twist if the lift motor has been trying to turn for a long period of time.
A quick check by pushing the coupling in, while you have the tray out of the machine will tell you if the shaft has a twist in it. If you push the coupling in slowly and it doesnt spring back toward you without any hestitation, then there is a small twist in the shaft. Always change the lift motor over. I carry one in my bag, because its the same part for all MX's and some of the high-end mono's.
You'll find a common capuse of lift motor twist is either a poorly loaded tray (paper caught between lift plate & plastic frame) or a broken PE actuator arm (caused by jammed lift plate). Make sure the lift plate mooves smoothly up & down without any binding. Lubricate under the plate as needed.Comment
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