Avalon FM20/FM30 Fetal Monitor Printhead For New And Original
In the context of Avalon FM20/FM30 fetal monitors, the term "drive board" is not an official component name. Instead, these monitors contain several specific printed circuit board assemblies (PCBs) that perform driving or control functions.
Key Component Boards
Main Board (Motherboard)
Part Number: M2705-66410 (also listed under 451261009061)
Serves as the central processing unit, controlling all primary monitor operations including signal processing from fetal probes (ultrasound, TOCO), maternal vital signs modules, and the overall user interface.
Primary suspect for monitor failures to boot, corrupted graphics, or unresponsive systems.
Power Supply Unit (PSU) / Power Board
Part Number: Part of the M4605A / M8023A series (External)
Wide-range switching power supply that automatically accepts input from 100V to 240V (±10%) at 50/60 Hz and converts to necessary DC voltages (primarily 24V output) to run main board, display, and thermal recorder.
Used for troubleshooting "No Power" or "Intermittent Shutdown" issues.
Connector Board (Sensor Interface)
Part Number: M2703-26420 / M2703-66420
Acts as the physical interface gateway where fetal sensors (TOCO, Ultrasound) and patient cables plug into the front of the monitor.
Addresses issues when specific sensors are not detected ("Probe Disconnected" error) while rest of monitor functions normally.
Touch Panel Controller Board
Part Number: M2703-26440
Controls the touchscreen overlay, translating touch inputs into digital signals for the Main Board.
Primary suspect when display shows waveforms/numbers but screen does not respond to touch input.
Technical Summary for Repair
Power Compatibility: Monitor does not require manual voltage selection; power supply is auto-sensing.
Safety Class: FM20/30 is a Class II device (double insulated), meaning it does not rely on protective earth ground for safety, though grounding is required for EMC compliance.