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• Black TD sensor disconnected
• Harness between TD sensor and PCU defective
• Defective TD sensor, replace the PCU
Note: The TD sensor cannot be replaced independently. The PCU must be replaced if the TD sensor is defective.
Order a new PCU from Ricoh. Power off the machine and replace the pcu.
If you try and cheat it it will run for a short while and then lock-up breaking some gears. Cheeper just to order a pcu. Check Ebay, i see alot of Ricoh supplies there.
Hi, SC 392 Possible causes -
· Someone forgot to remove the toner seal of the PCU
· ID sensor defective
· TD sensor abnormal
· Drum does not turn
· Development roller does not turn
· Poor connection of the PCU Regards,
One of our Ricoh CL3500N printers- less than a year old- gave us a "color regist error" after changing the transfer belt.
Ran the "adjust color regist" without results. It would just finish and pop back up with the same error.
Color test page printed no color, just BW
I reseated everything, and even replaced the PCU without positive results.
A couple hours later I went back, took everything out (be sure to keep the pcus out of the light!), and vaccuumed the heck outta that printer.
For whatever reason- maybe there was a chunk of toner hanging out, maybe I knocked something loose or back in place, whatever- but when I put all the parts in and turned it on, the error was gone and color printed great!