MODEL 1000 SEP 2005
TABLE OF CONTENTS
vii
5.0 MAINTENANCE .................................................. 5-1
5.1 TROUBLESHOOTING AND REPAIR CONCEPT ......................5-3
5.2 ROUTINE MAINTENANCE ......................................... 5-3
5.2.1 GC System Maintenance Checklist ......................................5-4
5.2.2 Routine Maintenance Procedures .......................................5-5
5.2.3 Contract Service ....................................................5-5
5.3 LOCATING AND GAINING ACCESS TO EQUIPMENT ELEMENTS ....5-6
5.3.1 Analyzer Electrical/Electronic Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.3.2 Detector Elements, Heater Elements, Valves and Columns . . . . . . . . . . . . . . . . . . . 5-7
5.4 PRECAUTIONS FOR HANDLING PRINTED CIRCUIT ASSEMBLIES ...5-8
5.5 SERVICE, TROUBLESHOOTING, AND REPAIR INSTRUCTIONS ......5-9
5.5.1 Preamplifier ....................................................... 5-11
5.5.2 Temperature Control ................................................5- 11
5.5.3 Decoder .......................................................... 5-11
5.5.3.1 Fuse Replacement................................................5- 11
5.5.3.2 Instructions for Removing the Decoder Board . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
5.5.3.3 Instructions for Reinstalling the Decoder Board . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.5.4 Analyzer Troubleshooting Guide ......................................5-14
5.5.4.1 Flow Balance Check.............................................. 5-14
5.5.4.2 Temperature ....................................................5-14
5.5.4.3 Baseline Drift ...................................................5- 15
5.5.4.4 Leak-Checking the Analyzer .......................................5-18
5.5.4.5 Plugged Lines, Columns, or Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
5.5.5 Chromatograph Valves .............................................. 5-25
5.5.5.1 Valve Cleaning ..................................................5- 25
5.5.5.2 Valve Overhaul..................................................5- 25
5.5.5.3 Valve Overhaul Instructions ........................................5-25
5.5.6 Detector Bridge Balance .............................................5-26
5.5.7 Temperature Measurements ..........................................5-27
5.5.8 Measure Vent Flow (MV) ............................................5-29
5.5.9 Analog Inputs .....................................................5-29
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