Thermo 48i - Page 6

Contents
vi Model 48i Instruction Manual Thermo Electron Corporation
Chapter 6 Troubleshooting.............................................................................. 6-1
Safety Precautions ................................................................... 6-1
Troubleshooting Guides.......................................................... 6-1
Board-Level Connection Diagrams ......................................... 6-5
Connector Pin Descriptions.................................................... 6-7
Service Locations................................................................... 6-20
Chapter 7 Servicing...........................................................................................7-1
Safety Precautions ................................................................... 7-3
Firmware Updates................................................................... 7-3
Replacement Parts List............................................................ 7-4
Cable List................................................................................ 7-5
Lowering the Partition Panel................................................... 7-7
Fuse Replacement ................................................................... 7-8
Fan Replacement..................................................................... 7-9
IR Source Replacement ......................................................... 7-10
Filter Wheel Replacement ..................................................... 7-11
Chopper Motor Replacement................................................ 7-13
Optical Bench Replacement.................................................. 7-14
Optical Switch Replacement ................................................. 7-15
Bench Heater Assembly Replacement.................................... 7-16
Detector/Preamplifier Assembly Replacement....................... 7-17
Pump Replacement............................................................... 7-18
Pressure Transducer Replacement ......................................... 7-20
Pressure Transducer Calibration ........................................... 7-21
Flow Transducer Replacement .............................................. 7-23
Flow Transducer Calibration ................................................ 7-24
Capillary Cleaning or Replacement ....................................... 7-25
Optional Zero/Span and Sample Solenoid
Valve Replacement................................................................ 7-26
Analog Output Testing ......................................................... 7-27
Analog Output Adjustment................................................... 7-29
Ambient Temperature Calibration ........................................ 7-30
I/O Expansion Board (Optional) Replacement ..................... 7-31
Digital Output Board Replacement....................................... 7-33
Motherboard Replacement.................................................... 7-34
Measurement Interface Board Replacement .......................... 7-35
Front Panel Board Replacement............................................ 7-36
LCD Module Replacement ................................................... 7-37
Service Locations................................................................... 7-39