MX3610 L4-06 error code

[mbcruzin]

Good Morning

Got an MX3610 that will throw an L4-07 error. I have replaced the Transfer belt motor in the field. Then brought machine in the shop for same code a few days later. Replaced the motor again, along with the MFP PWB (per sharp tech suggestion). It worked fine in shop for several days. After taking the machine back. The customer called the next day for the same issue L4-07. Replaced the Primary, and secondary transfer belt with no change. Machine is back in shop now. Any suggestions would be greatly appreciated.

Thanks Kevin

[OlliK1969]

L4-06 or L4-07 ??

[tee]

I was testing a machine yesterday, I unplugged the drive clutch on the main
drive unit and that code popped up.

[Sharptech0892]

Dirty sensors on either black or color on primary position, test with tc 30-1 1 tud cl and k should change state when turning belt cam by hand.

[mojorolla]

Dirty sensors on either black or color on primary position, test with tc 30-1 1 tud cl and k should change state when turning belt cam by hand.

....or just go into SIM 6 to test sensors AND both clutches without disassembly.