RF Power Amplifier (RPA)

Broadband RF amplifier that drives the body coil for transmit. Failures here produce either "no scans" or subtle image artifacts.

Fits

• MAGNETOM Symphony

Diagnosis

• 30-series fault codes → power supply
• 40-series fault codes → final output stage
• Audible pop or hiss at high duty cycle = stop scanning

Field notes

See field-guide/siemens-magnetom-symphony.