C2557 on C650i with low meter last year. manually toned back, but code returned. Found Tech Bulletin 13416. A small black plastic hinge pin at rear of k toner sub hopper that the detecting plate pivots on had indeed popped out and was laying on a narrow metal frame. I feel fortunate to not have dropped it when removing the sub hopper assembly. Put it back in place, reassembled , manually toned up a bit, cycled on/off a couple times to allow copier to add toner and ran about a hundred copies to test. No 255x codes for roughly a year now.
Comment