We send out the type 1515 PCU direct to the customer, it resets the message automatically when the unit is replaced.
It's not quite as straightforward explaining it to the end user as say the 1027 is, you need to take the complete toner hopper out of the machine and then there's a small lead at the front with a blue connector that needs disconnecting but is quite doable for most customers who aren't complete technophobes.
Like the 1027, the alarm is set to appear at 45k, the copy quality may be perfectly acceptable but this is the expected life that Ricoh place on the unit. It's up to you or your bosses to decide whether you are fitting it at the alarm or simply fitting it on failure. I've got a fair amount of these boxes on my patch and I do carry a spare PCU in the car, purely because some customers will not place a call for poor copy quality and/or "Replace PCU" alarm and will only call when the machine is finally down (usually SC500 main motor lock if the dev unit has seized or "won't add toner" when the dev auger gears are mashed).
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