When using a technician, agree what may be replaced and what should be retained

Before significant service, clarify the objective and priorities: reliability, originality, reversibility, cost or cosmetic recovery.

For vintage or collectable gear, ask to be informed before replacements that are not required for safety and, where appropriate, request removed parts back. For modern equipment, following official procedures and restoring full functionality may matter more.

A service report listing replaced components and identified faults increases the documentary value of the work.