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Contents
Chapter 6
Chapter 7
x Model 48i Trace Level-Enhanced Instruction Manual
Capillary Cleaning or Replacement ..................................................... 5-3
IR Source Replacement ....................................................................... 5-4
Fan Filter Inspection and Cleaning ..................................................... 5-4
Leak Test and Pump Check Out ......................................................... 5-5
External Leaks .................................................................................. 5-5
Pump Rebuilding ................................................................................ 5-6
Troubleshooting ................................................................................................. 6-1
Troubleshooting Guides ...................................................................... 6-1
Board-Level Connection Diagrams ..................................................... 6-9
Connector Pin Descriptions .............................................................. 6-11
Service Locations ............................................................................... 6-24
Servicing ............................................................................................................. 7-1
Safety Precautions ............................................................................... 7-2
Firmware Updates ............................................................................... 7-3
Accessing the Service Mode ................................................................. 7-3
Replacement Parts List ........................................................................ 7-4
Cable List ............................................................................................ 7-5
External Device Connection Components .......................................... 7-5
Removing the Measurement Bench and Lowering the Partition Panel 7-7
Fuse Replacement ............................................................................... 7-8
Rear Panel Fan Replacement ............................................................... 7-9
Bench Fan Replacement .................................................................... 7-10
IR Source Replacement ..................................................................... 7-11
Filter Wheel Replacement ................................................................. 7-12
Chopper Motor Replacement ............................................................ 7-14
Optical Bench Replacement .............................................................. 7-15
Optical Switch Replacement ............................................................. 7-16
Bench Heater Assembly Replacement ................................................ 7-17
Detector/Preamplifier Assembly Replacement ................................... 7-18
Preamp Board Calibration ................................................................. 7-20
Pump Replacement ........................................................................... 7-20
Pressure Transducer Replacement ..................................................... 7-21
Pressure Transducer Calibration ........................................................ 7-22
Flow Transducer Replacement .......................................................... 7-24
Flow Transducer Calibration ............................................................. 7-25
Zero/Span and Sample Solenoid Valve Replacement ......................... 7-26
Analog Output Testing ..................................................................... 7-27
Analog Output Calibration ............................................................... 7-29
Analog Input Calibration .................................................................. 7-30
Calibrating the Input Channels to Zero Volts ................................ 7-30
Calibrating the Input Channels to Full-Scale ................................. 7-31
Thermo Fisher Scientific
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Troubleshooting
