Servicing
7-2 Model 42i Low Source Instruction Manual Thermo Electron Corporation
• “PMT High Voltage Power Supply Replacement” on page 7-16
• “Reaction Chamber Cleaning or Removal” on page 7-19
• “NO2-to-NO Converter Replacement” on page 7-21
• “Solenoid Valve Replacement” on page 7-23
• “Ozonator Assembly Replacement” on page 7-24
• “Ozonator Transformer Replacement” on page 7-26
• “Input Board Replacement” on page 7-26
• “DC Power Supply Replacement” on page 7-29
• “Analog Output Adjustment” on page 7-32
• “Pressure Transducer Assembly Replacement” on page 7-33
• “Pressure Transducer Calibration ” on page 7-35
• “Temperature Control Board Replacement” on page 7-37
• “Ambient Temperature Calibration” on page 7-37
• “Fuse Replacement” on page 7-39
• “Scrubber Replacement” on page 7-39
• “I/O Expansion Board (Optional) Replacement” on page 7-40
• “Digital Output Board Replacement” on page 7-42
• “Motherboard Replacement” on page 7-42
• “Measurement Interface Board Replacement” on page 7-43
• “Front Panel Board Replacement” on page 7-45
• “LCD Module Replacement” on page 7-46
• “Service Locations” on page 7-47
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