A professional who repairs magnetic tape and grooved-tape dictating-transcribing machines, using wiring diagrams, handtools, and electronic testing equipment. Responsibilities include:

• Tests machines to isolate defective circuits, using oscilloscope, audioscope, test meters, tube and circuit testers, and referring to wiring diagrams.
• Replaces faulty parts, such as tubes, transistors, microphones, relays, and resistors, using soldering iron and handtools.
• Replaces or adjusts mechanical elements, such as playback mechanisms, remote control switches, and tape reels.
• Operates repaired machines to test their performances.
• May operate bench lathe to fabricate shims, bolts, and other similar parts.
• May be designated according to type of machine repaired as dictating-transcribing-machine grooved tape servicer; dictating-transcribing-machine magnetic tape servicer.
• Important variables may be indicated by trade name of machines repaired.