Philip Avalon FM20 / FM30 Thermal Printhead (TLPH)

Philip Avalon FM20 / FM30 Thermal Printhead (TLPH) 

1. Basic Information

• Official Name: Thermal Line Printhead (TLPH)
• Compatible Models: Avalon FM20, FM30 (M2702A, M2703A)
• Printer Type: 6-inch thermal array recorder
• Part Number (Original): 4522 991 25291 (assembly)

2. Optical / Printing Resolution

• Dot Density: 8 dots/mm (203.2 dpi)
• Effective Print Width: 150 mm (full paper width)
• Total Dots: 1200 dots (150 mm × 8 dots/mm)
• Dot Pitch: 0.125 mm × 0.125 mm

3. Electrical Characteristics

• Printhead Voltage: 5.0 VDC ±5% (logic) / 24 VDC ±10% (heating)
• Current Per Dot: ~20–25 mA (peak)
• Resistance Per Element: ~120 Ω (typical)
• Interface: 50-pin ribbon cable (to Recorder Adapter Board M2703-66430)

4. Mechanical & Performance

• Print Speed:
  • Standard: 25 mm/s
  • Fast: 50 mm/s (for review playback)
   
• Paper Speed Range: 1–50 mm/s (configurable)
• Lifetime: ≥1,000,000 lines (under rated conditions)
• Operating Temp: +5°C to +45°C
• Storage Temp: -20°C to +60°C

5. Paper Specifications (Matching)

• Paper Width: 150 mm (Z-fold or roll)
• Paper Type: Medical-grade thermal paper (HP 1911A / Philip 453564435211)
• Sensor: Optical reflective sensor (for black mark detection)

6. Key Features

• 5-channel recording: FHR1, FHR2, TOCO, MECG, annotations
• High contrast: For clear FHR/TOCO waveform reproduction
• Long-term stability: Ceramic heating elements, anti-corrosion coating