Sharp mx2640n constant replacements of sensors (reg/doc feed) and boards (mc/dv)

[wyo19]

We have a MX2640N in place less than a year with constant problems with paper feed sensors. First the reg sensor went and then replaced all the sensors on the upper doc feed unit (paper pick up).
Then we had to replace the MC/DV HVPS, and two weeks later sensors 3/4 of the Doc feed (new style sensor)
Now the machine has an issue with tray 2 not sensing paper in the tray,paper not raising. I'll more than likely just get another sensor...
I have never had to replace so many sensors on one machine, any input would be great.
Thanks in advance.

P.S. just ordered a INVOLT line conditioner

[bdcrandall13]

Are there any other devices/appliances plugged into the same circuit?

[Jhonjon]

We have a MX2640N in place less than a year with constant problems with paper feed sensors. First the reg sensor went and then replaced all the sensors on the upper doc feed unit (paper pick up).
Then we had to replace the MC/DV HVPS, and two weeks later sensors 3/4 of the Doc feed (new style sensor)
Now the machine has an issue with tray 2 not sensing paper in the tray,paper not raising. I'll more than likely just get another sensor...
I have never had to replace so many sensors on one machine, any input would be great.
Thanks in advance.

P.S. just ordered a INVOLT line conditioner

Does this machine have the latest firmware?

[MHeon71]

As far as sensors go, there has been a bulletin on sensors going bad and they upgraded them. For the most part, they affected the f paper path DF sensors and the tray feed unit sensors.

[mojorolla]

There are 19 that can go at any time....awesome!!!
sensors.JPG

[blackcat4866]

All I can say is keep replacements in your car. They are very popular right now. =^..^=

[sharphead]

I had a doc feed give trouble with sppd3 a while back, I replaced the sensor it worked fine for a while but gave up again. So I replaced the board on the doc feed and the sensor and it hasnt came back.

[engineerboy93]

This is odd because Sharp actually makes some of the best sensors, which attributes to their high price unfortunately. I guess times must have changes, or Sharp no longer makes the sensors and has someone else make them. I even have robotics books from the 1980's praising Sharp for their optical sensors. Oh well.

[wyo19]

We have a MX2640N in place less than a year with constant problems with paper feed sensors. First the reg sensor went and then replaced all the sensors on the upper doc feed unit (paper pick up).
Then we had to replace the MC/DV HVPS, and two weeks later sensors 3/4 of the Doc feed (new style sensor)
Now the machine has an issue with tray 2 not sensing paper in the tray,paper not raising. I'll more than likely just get another sensor...
I have never had to replace so many sensors on one machine, any input would be great.
Thanks in advance.

P.S. just ordered a INVOLT line conditioner

replaced all 20 sensors,machine works great

[blackcat4866]

This is odd because Sharp actually makes some of the best sensors, which attributes to their high price unfortunately. I guess times must have changes, or Sharp no longer makes the sensors and has someone else make them. I even have robotics books from the 1980's praising Sharp for their optical sensors. Oh well.

I has a perfect example of that Friday. I had a Toshiba eS656 with E570 jams ... but only after 164 consecutive pages. E570 is in the inverter, and I had it pegged as a inverter gate solenoid magnetizing. Since every page delivers face down, every page must invert before leaving, twice if duplex. If I fiddled with the machine for 20 minutes or more, I could get another 160 pages. Once it started jamming though, I couldn't get 1 more page through.

When I arrived with the solenoid I had a different code, E3C0. That's a registration jam, and regardless of the paper source, the paper stopped at the registration every time. Testing in 03 Mode was definitive. Replacing the registration sensor cleared the E3C0. But alas, after 126 pages the E570 returned, and the solenoid didn't help. But the two inverter sensors did solve the E570. Most likely only one of them was bad, but I was running out of patience with it. They were all Sharp "73" photointerrupters.

Would anyone care to venture an explanation why I would have two bad photointerrupters in the same machine simultaneously?
=^..^=