Konica Minolta SD-501 - Manual (Page 18)

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If “Trim Receiver Exchange” Message Is Displayed
This machine trims the printed sets using a cutting blade and its receiver, which may
require replacement in a long period of use.
When replacement is due, a “Trim Receiver exchange” message appears under the
Trim Dust indicator in the option status area of the Machine Status Screen.
If the above message is displayed, please contact your service representative.
The machine manager can call for service using the Utility setting (06 Machine
Manager Setting>06 System Connection>01 User Call). See p. 5-81 of POD
Administrator’s reference.
In this case, you don’t have to make a call for preventive maintenance,
because your machine has been monitored automatically by your service
representative.