KABA ACE 3251HPD, inspection and repair due to operational defect

"Sometimes the key won't turn."

It seems that the lock was changed when I moved in 3 months ago. He said he asked a locksmith to find it himself.

When I checked the operation, the key did not turn even if I stuck it in. This may be due to a defect in the main unit. The cylinder logo is also upside down. I tried to disassemble it, but there were signs of it being pried.

After disassembling it, I reassembled it correctly and spray-cleaned the cylinder to confirm normal operation. I felt a little disappointed that there were some locksmiths who overlooked the basics.