HP 5890 Series II User manual

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Service Manual
HP 5890 SERIES II
Gas Chromatograph
Manual Part No.
05890-90320 Edition 1, March 1991 Printed in U.S.A.
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com

SVC TOC -1
HP 5890 Series II
MAINTENANCE PROCEDURES
Table of Contents
SECTION 1. INTRODUCTION SVC 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP 5890 SERIES II GASCHROMATOGRAPH SVC 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Troubleshooting SVC 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION SVC 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Test Equipment SVC 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTANON-FUNCTIONING INSTRUMENT SVC 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Information SVC 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power On Sequence SVC 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTBAUTOMONITOR MESSAGES SVC 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTCOPERATOR INSTIGATED INDICATIONS SVC 1-8. . . . . . . . . . . . . . . . . . . . . . . . .
Test Chromatogram Signal Output Test SVC 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PARTDFUNCTIONAL SYMPTOMS SVC 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2. INLET COMPONENTS SVC 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING INLET COMPONENTS SVC 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PACKED COLUMN INLET SVC 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Packed Column Inlet SVC 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SEPTUM-PURGED PACKED COLUMN INLET SVC 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Septum-Purged Packed Column Inlet SVC 2-5. . . . . . . . . . . . . . . . . . . . . . . . . .
SPLIT-ONLYCAPILLARYINLET SVC 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Split-Only Capillary Inlet SVC 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPLIT/SPLITLESS CAPILLARYINLET SVC 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Split/Splitless Capillary Inlet SVC 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PROGRAMMABLE COOL ON COLUMN INLET (PCOC) SVC 2-16. . . . . . . . . . . . . . . . . . . . .
Remove/Replace PCOC Inlet SVC 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INJECTION PORTCOOLING FAN SVC 2-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Cooling Fan SVC 2-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3. FLOW/PRESSURE CONTROL COMPONENTS SVC 3-1. . . . . . . . . .
FLOW/PRESSURE CONTROL COMPONENTS SVC 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCOC EPC/MPC Troubleshooting SVC 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Inlet Flow Control Components SVC 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Split/Splitless Capillary Inlet Solenoid Valve SVC 3-7. . . . . . . . . . . . . . . . . . . . .
Remove/Replace Electronic Pressure Control (EPC) Components SVC 3-11. . . . . . . . . . . . . . . . . .
Remove/Replace Manual Pressure Control (MPC) Components SVC 3-14. . . . . . . . . . . . . . . . . . .
Remove/Replace EPC/MPC Pressure Control PCB SVC 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Switch Settings for EPC/MPC PCBs SVC 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Electronic Flow Sensor Module SVC 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Flow Sensor (EFS) Calibration SVC 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the ZERO Calibration Value SVC 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SVC TOC -2
Setting the GAIN Calibration Value SVC 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Entering Specific ZERO and GAIN Values SVC 3-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing/Repairing aFlow Manifold Block SVC 3-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4. DETECTORS SVC 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING DETECTOR COMPONENTS SVC 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DETECTOR TROUBLESHOOTING SVC 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
THERMAL CONDUCTIVITY DETECTOR (TCD) SVC 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace TCD Detector Weldment SVC 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace TCD Solenoid Switching Valve SVC 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FLAME IONIZATION DETECTOR (FID) SVC 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace FID Ignitor SVC 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace FID Diode Bridge Assembly SVC 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace FID Collector Body/Collector Assembly SVC 4-14. . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace FID Jet SVC 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace FID Detector Weldment SVC 4-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NITROGEN-PHOSPHORUS DETECTOR (NPD) SVC 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace NPD Active Element Power Transformer (Toroid) SVC 4-28. . . . . . . . . . . . . . . .
Remove/Replace NPD Collector SVC 4-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace NPD Jet SVC 4-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace NPD Active Element Power Control SVC 4-38. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace NPD Detector Weldment SVC 4-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRON CAPTURE DETECTOR (ECD) SVC 4-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRON CAPTURE DETECTOR (ECD) (19233A/19235A VERSIONS) SVC 4-49. . . . . . .
Remove/Replace ECD Cells Weldment and/or Heated Block
(19233A/19235A Versions) SVC 4-49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRON CAPTURE DETECTOR (G1223A/G1224A VERSIONS) SVC 4-53. . . . . . . . . . . .
Remove/Replace ECD Cells Weldment and/or Heated Block
(G1223A/G1224A Versions) SVC 4-53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clean Anode (ECD Cell Weldment) (G1223A/G1224A Versions) SVC 4-56. . . . . . . . . . . . . . . . .
FLAME PHOTOMETRIC DETECTOR (FPD) SVC 4-58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clean/Replace Photomultiplier Tube (PMT) SVC 4-58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clean/Replace FPD Filter SVC 4-61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace FPD Diode Bridge Assembly SVC 4-63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Clean/Replace FPD Heat Shield Windows SVC 4-66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace FPD Jet Assembly and First Heat Shield Window SVC 4-70. . . . . . . . . . . . . . . . . . . . . . . .
Replace Fused Silica Liner SVC 4-76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Detector Base Weldment SVC 4-80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust High Voltage SVC 4-85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING ADETECTOR PCB SVC 4-87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Detector PCB SVC 4-87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5. OVEN TEMPERATURE SVC 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING OVEN TEMPERATURE CONTROL SVC 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPONENTS
OVEN TEMPERATURE TROUBLESHOOTING SVC 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Oven Shroud Assembly SVC 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Oven Heater Element SVC 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Oven Temperature Sensor SVC 5-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Oven Fan and/or Oven Fan Motor SVC 5-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Oven Flap Motor SVC 5-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Cryogenic Valve and/or Nozzle SVC 5-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibrate Oven Temperature SVC 5-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6. ZONE TEMPERATURE SVC 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING TEMPERATURE CONTROL SVC 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPONENTS
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SVC TOC -3
ZONE TEMPERATURE TROUBLESHOOTING SVC 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Inlet, Detector, and Valve Box SVC 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater/Sensor Cable Assemblies
Disconnect/Connect Heater and Temperature Sensor SVC 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring on Main PCB
Remove/Replace Inlet Zone Heater and Sensor Cartridges SVC 6-9. . . . . . . . . . . . . . . . . . . . . . . .
`Remove/Replace Packed Column Inlet Heater and Sensor Cartridges SVC 6-9. . . . . . . . .
`Remove/Replace Septum-Purged Packed Column Inlet SVC 6-11. . . . . . . . . . . . . . . . . . .
Heater and Sensor Cartridges
`Remove/Replace Split-Splitless/Split-Only Capillary Inlet SVC 6-13. . . . . . . . . . . . . . . . .
Heater and Sensor Cartridges
`Remove/Replace PCOC Inlet Heater and Sensor Cartridges SVC 6-16. . . . . . . . . . . . . . . . . . . .
Remove/Replace Detector Zone Heater and Sensor Cartridges SVC 6-18. . . . . . . . . . . . . . . . . . . .
`Remove/Replace TCD Heater and Sensor Cartridges SVC 6-18. . . . . . . . . . . . . . . . . . . . . . . . .
`Remove/Replace FID Heater and Sensor Cartridges SVC 6-20. . . . . . . . . . . . . . . . . . . . . . . . . .
`Remove/Replace NPD Heater and Sensor Cartridges SVC 6-24. . . . . . . . . . . . . . . . . . . . . . . . .
`Remove/Replace ECD (19233A/19235A VERSIONS) SVC 6-28. . . . . . . . . . . . . . . . . . . . . . . .
Heater and Sensor Cartridges
`Remove/Replace ECD (G1223A/G1224A VERSIONS) SVC 6-31. . . . . . . . . . . . . . . . . . . . . . .
Heater and Sensor Cartridges
`Remove/Replace FPD Heater and Sensor Cartridges SVC 6-34. . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Valve Box Heater and Sensor Cartridges SVC 6-37. . . . . . . . . . . . . . . . . . . . . . . .
Replacing TCD Delta-T Temperature Sensor Cartridges SVC 6-39. . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace PCOC Inlet Cryogenic Cooling (Cryo-Blast) Weldment SVC 6-42. . . . . . . . . . .
Temperature Sensor Data SVC 6-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 7. VALVES SVC 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VALVES SVC 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION SVC 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VALCO VALVES 18900F SVC 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Purpose Valves (GPVs) SVC 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustable Restrictors SVC 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Sample Loops SVC 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIQUID SAMPLE VALVES (LSVs) SVC 7-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting and Maintenance SVC 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chromatographic Symptoms SVC 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Sensitivity or Excessive Drift SVC 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loss of Peaks in Specific Areas of the Chromatogram SVC 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseline Upsets SVC 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extraneous Peaks SVC 7-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locating Leaks SVC 7-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Check SVC 7-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Box Assembly Removal SVC 7-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Actuator Alignment SVC 7-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Actuation of GC-Controlled Valves SVC 7-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Configuration Diagrams SVC 7-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SVC TOC -4
SECTION 8. KEYBOARD AND DISPLAYSVC 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
KEYBOARD AND DISPLAYREPLACEMENT SVC 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
KEYBOARD AND DISPLAYTROUBLESHOOTING SVC 8-2. . . . . . . . . . . . . . . . . . . . . . . . .
Replace Display PCB Assembly SVC 8-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 9. MAIN PCB SVC 9-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAIN PCB SVC 9-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Main PCB SVC 9-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 10. DATACOMMUNICATIONS SVC 10-1. . . . . . . . . . . . . . . . . . . . . . . . . .
COMMUNICATION INTERFACE COMPONENTS SVC 10-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Communications Interface PCB SVC 10-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replace Rear Panel Connector PCB and/or Cable for DICE PCB SVC 10-5. . . . . . . . . . . . . . . . . .
INET CONFIGURATION SVC 10-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Between “Global” and “Local”SVC 10-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INET/HP-IL Adresses SVC 10-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Verifying the HP 5890 Series II INET Address SVC 10-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Default HP-IL Address SVC 10-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INET-HP 5890 Signal Definition SVC 10-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HP-IL Loopback Test SVC 10-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 11. POWER SUPPLYSVC 11-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACING POWER SUPPLYCOMPONENTS SVC 11-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Power Supply PCB SVC 11-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Power Supply Transformer SVC 11-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Power Switch SVC 11-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove/Replace Power Cable SVC 11-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX A.PCB CONNECTOR INFORMATION APX A-1. . . . . . . . . . . . . . . . . .
ACPOWER PCB CONNECTORS APX A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
120VACBOARD APX A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
220VACSINGLE PHASE BOARD APX A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
220VACSPLIT PHASE BOARD APX A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAIN PCB CONNECTORS APX A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P1 KEYBOARD CONNECTOR APX A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P2 DETECTOR APCB CONNECTOR APX A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P3 DETECTOR BPCB CONNECTOR APX A-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P4 ANALOG SIGNAL 1OUTPUT CONNECTOR APX A-7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
P5 ANALOG SIGNAL 2OUTPUT CONNECTOR APX A-8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
P6 REMOTE STARTCONNECTOR APX A-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P7 TEMPERATURE SENSOR CONNECTOR APX A-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P8 OVEN FLAP MOTOR CONNECTOR APX A-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J9 CRYOGENIC VALVE AND AUX HEATED ZONE CONNECTOR APX A-9. . . . . . . . . . .
P10 ACPOWER SUPPLYCONNECTOR APX A-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P11 ELECTRONIC FLOW SENSOR CONNECTOR APX A-10. . . . . . . . . . . . . . . . . . . . . . . . . . .
P12 EPC/MPC PCB CONNECTOR APX A-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P13 COMMUNICATIONS PCB CONNECTOR APX A-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J14 AUXILIARYCONNECTOR APX A-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P15 WORKFILE EMULATION CONNECTOR APX A-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DISPLAYPCB APX A-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DETECTOR PCBS APX A-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPC PCB CONNECTORS APX A-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPC PRESSURE TRANSDUCER MODULE APX A-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPC PROPORTIONAL CONTROL VALVE APX A-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MPC PCB APX A-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS232C PCB CONNECTORS APX A-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SVC TOC -5
INET PCB APX A-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BUFFERED INET PCB APX A-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DICE PCB APX A-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DICE CONNECTOR PCB APX A-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRONIC FLOW SENSOR MODULE APX A-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VALVE PCB CONNECTORS APX A-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SVC 1-1
Section 1
INTRODUCTION
HP 5890 SERIES II GAS CHROMATOGRAPH
This section is intended to help the technician isolate problems to aspecific component or compo-
nents. The HP 5890 Series II may be found in many different configurations, with varying component
options. This complicates the process of providing detailed troubleshooting procedures for even gener-
al problems. But, by using the general troubleshooting techniques presented here, along with the func-
tional diagrams found at the end of this section, successful results should be achieved.
There are five inlet options and six detector options which may be encountered when servicing an HP
5890 Series II Gas Chromatograph, as well as awide variety of flow and pressure control components.
All of these common inlet and detector components are represented by the functional diagrams at the
end of this section. When troubleshooting inlets, detectors, and/or the flow/pressure systems, fold out
the page corresponding to the employed detector,while leaving the book open to the page corre-
sponding to the employed inlet. Maintenance procedures for most of the components are given in the
following sections. Procedures are supplied to remove, replace, and/or clean various subassemblies,
based on the current maintenance philosophy,i. e., to allow replacement of the lowest level compo-
nents applicable for aparticular item.
Specific part numbers are not given in this portion of the service manual. For all replacement part num-
bers, refer to the IPB portion of this document.
This document is not meant to provide instruction for first time installation of any of the options dis-
cussed. The add-on sheets, which accompany the various options, exist for just this purpose, and
should be referenced when performing afirst time installation.
TABLE OF CONTENTS
HP 5890 SERIES II GAS CHROMATOGRAPH SVC 1-1..........
Electronic Troubleshooting SVC 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
INTRODUCTION SVC 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recommended Test Equipment SVC 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PART ANON-FUNCTIONING INSTRUMENT SVC 1-3. . . . . . . . . . . . . . . . . . . .
Fuse Information SVC 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power On Sequence SVC 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PART BAUTOMONITOR MESSAGES SVC 1-5. . . . . . . . . . . . . . . . . . . . . . . . . .
PART COPERATOR INSTIGATED INDICATIONS SVC 1-8. . . . . . . . . . . . . . . . .
Test Chromatogram Signal Output Test SVC 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . .
PART DFUNCTIONAL SYMPTOMS SVC 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SVC 1-2
Electronic Troubleshooting
INTRODUCTION
This section is intended to aid the operator and service engineer in the troubleshooting process, i.e., of
going from symptom to cause. It has been subdivided into four subsections by type of symptom.
Part Acovers the most obvious indications of problems. The instrument apparently (generally when
first turned on) doesn’twork at all. (NON-FUNCTIONING INSTRUMENT)
Part Bincludes the symptoms that can appear as avisual indication or message on the front of the
keyboard/display module. These messages are aresult of the instrument’sextensive automonitoring
system. (AUTOMONITOR MESSAGES)
Part Cdiscusses the visual information that the operator can instigate and use as part of the trouble-
shooting process. These visual indications are normally not available unless specifically requested by
the operator.(OPERATOR INSTIGATED INDICATIONS)
Part Dcontains symptoms (other than those that appear on the visual display) that indicate apossible
problem. Typically,these types of symptoms can be associated with aspecific functional area of the
instrument. (FUNCTIONAL SYMPTOMS )
Electrical Safety Precautions
In all nonelectrically oriented sections of this manual, the standard Hazardous Voltage Warning strongly
recommends turning off all of the power to the instrument. However,this section, as well as most of
Service Section, requires that some electrical measurements be made on active (energized) circuits.
MEASUREMENTS AND/OR TESTS THATNEED TO BE MADE ON ELECTRICALLY
ENERGIZED PORTIONS OF THE INSTRUMENT SHOULD BE PERFORMED ONLYBY
SERVICE-TRAINED PERSONNEL WHO ARE AWARE OF ALL INVOLVED HAZARDS.
The Service Section of this manual contains proper step by step procedures for replacing electronic
boards and other major assemblies. These procedures include instructions that should be followed for
both personnel and instrument welfare.
`The following steps require protection against ESD (Electro-Static Discharge).
Use agrounded wrist strap (part no. 9300-0969 -large, or 9300-0970 -small)
connected to asuitable ground. Failure to heed this caution may result in
damage to the instrument.
`When storing or in between handling of PCBs (Printed Circuit Boards), always
place them in static control envelopes or enclosures.
Recommended Test Equipment
The only piece of test equipment required to troubleshoot the instrument is agood, volt/ohmmeter.
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SVC 1-3
PART ANON-FUNCTIONING INSTRUMENT
Atotally non-functioning or DEAD instrument is one that apparently isn’tworking at all. It has no visual
indications (i.e., messages) on its front panel and produces no noise or heat.
The most obvious cause for such aproblem is that line power is not reaching the instrument or that the
instrument is not turned on. First check that the Line Power Switch is ON. Then verify that the instru-
ment power cord is plugged into aproper receptacle. If neither of these acts restore the instrument to
operation, suspect that there may be aproblem with the receptacle or the power being supplied to it.
This type of situation generally requires that a local electrical maintenance person be informed to reme-
dy the problem. However,on the rare occasion that power is being provided, but the instrument is not
working, the problem area must be isolated by tests and measurements on the instrument.
MEASUREMENTS AND/OR TESTS THATNEED TO BE MADE ON ELECTRICALLY
ENERGIZED PORTIONS OF THE INSTRUMENT SHOULD BE PERFORMED ONLYBY
SERVICE-TRAINED PERSONNEL WHO ARE AWARE OF ALL INVOLVED HAZARDS.
Any one of several problems internal to the instrument can cause the non-functioning symptom. Since
the instrument operates under processor control, afaulty component in the CPU or Clock sections of
the Main Board may be the source of the problem. More commonly,aproblem in the instrument’spow-
er supply would be the most likely to cause this type of problem.
Two bits of information, plus the use of IPB, should enable service-trained personnel to isolate and
then correct the cause of the problem if it is power related. The first important bit of information is about
the fuses that are internal to the instrument. The second bit is the normal sequence of events that oc-
curs as the instrument is energized (Power On Sequence).
Fuse Information
Fuses have been installed at several locations within the instrument for the protection of major power
circuits. They are designed to open as quickly as possible to prevent damage to other components
within the circuit. Occasionally,an opened fuse may have been caused by ashort onetime surge; how-
ever,it is far more common that a component within the protected circuit has failed. When an open fuse
is noticed, replace it once. If the replacement blows, suspect acomponent failure.
Fuses are located on the AC Power Board and on the Main Board. The AC Power Board fuses protect
the two high-power circuits. One fuse, (F1) or two in asplit phase circuit (F3 &F4), protects the col-
umn oven heater and fan. Another fuse (F2) or two in asplit phase circuit (F1 &F2) protects the main
power transformer.(Refer to Section 8of the IPB portion of this document for power supply PCB infor-
mation. Refer to Section 9of the IPB portion of this document for main PCB information.)
The three secondary voltages of the main power transformer are protected with fuses located on the
Main Board. F3 protects the 120 VAC secondary which ultimately provides heater power for all of the
zones. F4 and F5 protect the 40 VAC secondary which ultimately provides all of the DC supply voltages
(+5, +10, +15, -15, +24, -24). Fuses protect the 3VAC secondary that is used for FID ignitor (F1)
and electronic flow sensor voltages (F2).
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SVC 1-4
Power On Sequence
As long as correct Line Voltage is provided to the instrument, the following events should occur when
the instrument’sLine Power Switch is placed in its ON position. Main Transformer (T1) primary winding
is energized (fused by F2 on AC Board or F1 &F2 if split phase). (Refer to Section 9of the IPB portion
of this document for main PCB information.)
The three secondary windings (3 VAC, 40 VAC, and 120 VAC) of T1 are energized. All are fused on the
Main Board. These voltages arrive on the main board through connector J10. (Refer to appendix Aof
this document for all connector information.)
The 40 VAC is rectified and divided to produce +24 VDC and +15 VDC.
From these DC supplies, the +10 VDC, the +5 VDC, and the Master Oscillator (for clocks) begin to
function.
As these other supplies begin, the (POWER ON PULSE) and the CPU portion of the circuitry begin to
initialize, first themselves, and then through the Data Bus and other portions of the instrument.
One of the initializations that occurs through the Data Bus is in the Triac Control section to produce the
control signal for K3 (zone power relay) on the Main Board and the signal for K1 (oven contactor) on
the AC Board.
K3 relay allows distribution of the fused 120 VAC secondary from the Main Transformer.
K1 power contactor on the AC Board allows line power distribution to the Oven Fan Motor and to the
Oven Heater Triac circuit. Note that the oven fan will run as long as power is allowed (under software
control) through K1. However,the oven heater is NOT energized until oven heat is requested.
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SVC 1-5
PART B AUTOMONITOR MESSAGES
This section includes the symptoms that can appear as avisual indication or message on the front of
the keyboard/display module. These messages may appear (depending upon their seriousness) either
at the time that the problem occurs or in the instrument’sSelf Test.
Messages resulting from the automonitoring software within the instrument will be one of four classes:
FATAL ERR:
H2 ALARM -
FAULT:
WARN:
The FATAL ERR: message is the most serious. This class of message indicates that the HP 5890 SE-
RIES II is essentially nonfunctional. The instrument will always go to aNOT READYstate and even the
keyboard is inoperative.
FATAL ERR: EPP &FLOW Indicates Electronic Pressure Control (EPC) and Electronic Flow Sen-
sor(EFS) modules are installed simultaneously.The instrument must be powered down and one of two
modules must be removed to correct this situation. No damage should occur to the instrument.
FATAL ERR: BAD RAM indicates aproblem with RAM chip and its circuitry in the CPU Section of Main
Board. Replace Main Board.
FATAL ERR: BAD ROM indicates aproblem with ROM chip and its circuitry in the CPU Section of Main
Board. Replace Main Board.
FATAL ERR: >!25 MS indicates that the 40 Hz task couldn’tcomplete within !25 milliseconds. Suspect
aproblem with the Clock Section of the Main Board; however,the CPU Section could also cause this
indication. Replace Main Board.
FATAL ERR: STACK ERR indicates that stack is beyond legal limits. Suspect aproblem in the CPU Sec-
tion of the Main Board. Replace Main Board.
FATAL ERR: RUN CNTL indicates that the Run Control task couldn’tcomplete within 25 milliseconds.
Suspect aproblem with the Clock Section of the Main Board; however,the CPU Section could also
cause this indication. Replace Main Board.
As can be seen from the FATAL ERR: message listing above, they are generally an indication that a fail-
ure exists either in the Clock or CPU Sections of the Main Board. The Clock Section operation can be
easily checked by measuring the frequencies on its outputs. Once the clocks are verified to be good,
the CPU (Z80) could be checked by substitution.
The H2 ALARM message indicates afailure of the system to hold or reach the electronic pressure set-
point. All electronic pressures and heated zones will be shut off.To recover,the problem must be cor-
rected and the GC power cycled.
H2 ALARM -EPP Aindicates electronic pressure problem with
the Asystems ability to hold pressure. Possibly aleak, trouble shoot the proportional control valve,
pressure transducer and the inlet in the case of the EPC. Trouble shoot the forward pressure regulator
and gage in the case of the MPC.
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SVC 1-6
H2 ALARM -EPP Bindicates electronic pressure problem with
the Bsystems ability to hold pressure. Possibly aleak, trouble shoot the proportional control valve,
pressure transducer and the inlet in the case of the EPC. Trouble shoot the forward pressure regulator
and gage in the case of the MPC.
The FAULT:message indicates that a major subsystem of the HP 5890 SERIES II is not functioning
properly.Although the operation of the suspected subsystem is suspended until the problem is cor-
rected, the balance of the GC is operational. Note that the instrument can never reach afully READY
state when aFAULTcondition exists.
FAULT:ADC OFFSET indicates aproblem with the thermal ADC offset reading. Replace the Main
Board.
FAULT: LINE SENSE indicates aproblem either with the actual line voltage or with the sensing circuit.
Measure the line voltage and if the measurement is between +5% and-10% of the instruments stated
rating then the line voltage is O.K.Determine if the 120 VAC secondary exists and if its fuse (F3) is
open. If both F3 and the 120 VAC secondary are good then their is afailure in the line sense circuit and
the main board should be replaced.
FAULT:OVEN >MAX+20 indicates that the oven senses its temperature has exceeded the current
setpoint value by more than 20 degrees C. This message (as any FAULTmessage regarding atem-
perature problem) shuts down all of the temperature systems. The problem could be either in the oven
sensing or in the oven control circuits. List the oven temperature; if the display indicates that the actual
valve is above 800 degrees C, most likely the oven sensor is open (although it could be some compo-
nent in the sensing circuit). If the actual value of the oven temperature seems reasonable, the problem
is likely to be in the oven control circuitry.
FAULT:(ZONE NAME) TEMP RDG where the ZONE NAME could be OVEN, INJA,INJB, DETA,
DETB, or AUX.Any of these messages indicates that the specified zone (or oven) temperature reading
was out of acceptable range. This most often is the result of an inoperative sensor in the named zone.
FAULT:(OUTPUT NAME) TEST where the OUTPUT NAME could be DAC1, DAC2, ATTN1, or
ATTN2. If thermal fault messages also appear,suspect the A/D Converter circuitry.The A/D Converter
section of the Main Board is used to measure DAC and ATTN outputs. However,if only this test mes-
sage appears, the most obvious area to suspect is the D/A Converter portion of the appropriate board.
DAC2 or ATTN2 indicates the D/A section of the Interface Board; whereas the DAC1 or ATTN1 indi-
cates the D/A portion of the Main Board. Other areas that could be at fault include the CPU and A/D
sections of the Main Board, but are less likely.Occasionally,multiple faults messages may exist at the
same time. Only the last message to occur will automatically be displayed on the front panel of the in-
strument. Others will be retained in the instrument’smemory.By pressing the CLEAR key,the instru-
ment will roll through all of its Not Ready states (which include all FAULTs).
FAULT:EPP RAM TEST indicates the RAM has failed selftest. This requires board replacement.
FAULT:EPP ROM TEST indicates the ROM has failed selftest and should be replaced.
FAULT:INET CPU indicates that the Communications Interface Board is not responding properly.Typi-
cally,this message is caused by afaulty microprocessor (CPU) on the Interface Board.
FAULT:INET CPU RAM indicates that the read/write memory internal to the CPU on the Interface
Board is not functioning as expected. Replace either the Interface Board or its CPU.
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SVC 1-7
FAULT:INET RAM indicates that the RAM chip on the Interface Board is not responding properly.Typi-
cally,the RAM chip on the Interface Board should be replaced.
FAULT:INET ROM indicates that the ROM chip on the Interface Board is not responding properly.Typi-
cally,the ROM chip on the Interface Board should be replaced.
Another good technique to investigate multiple messages, after noting the currently displayed mes-
sage, is to switch the power line switch of the instrument off,and then on. This will force the instrument
to process through its initializing SelfTest. During this testing sequence, indications other than the pre-
viously displayed message may appear to provide more information.
By running the instrument SelfTest ((either at power turn-on or through the Calib and Test (Clear Dot)
Modes)), WARN:messages may appear.
The WARN:message indicates that a condition exists that may need attention. Generally,the instru-
ment remains fully operational, except for the function indicated on the visual display.Pressing any in-
strument function will erase the WARN:message. The following five WARN:messages will only appear
via the SelfTest.
WARN:MEMORY RESET indicates that the instrument memory has been reset to the default setpoints
including flow and oven calibrations. This could have been done by operator keyboard entry (see Sec-
tion 13 of this manual), by RAM replacement, or by removing the battery.
WARN:SIGNAL CHANGED indicates that a detector that was previously assigned to aparticular signal
is no longer recognized. The instrument will reconfigure the signal. This may occur as aresult of detec-
tor boards having been removed during arepair.If these boards have not been recently removed, sus-
pect afailure and refer to Detector Problems later in this section.
WARN:NO DETECTORS indicates that no detector boards are installed or that they are not recog-
nized as being installed by the processor.If detector boards are physically installed and not recognized,
suspect the boards, the I/O section, or the CPU section of the Main Board.
The WARN:OVEN SHUT OFF message is somewhat of ahybrid between other WARN:messages
and aFAULT:message. Similar to other WARN:messages, the WARN:OVEN SHUT OFF message
occurs most often as aresult of inoperative hardware (rather than software). This may be something as
simple as the operator leaving the oven door open. However,different from other WARN:(similar to
FAULT:) messages, the WARN:OVEN SHUT OFF message may occur any time that conditions war-
rant. The operator need not run the SelfTest for this message to be displayed. WARN:OVEN SHUT
OFF indicates that the oven temperature has been shut off because it could not heat as quickly as it
should or because it cooled more slowly than it should. Suspect that the oven flap could be stuck, or
that a large thermal leak from the oven has occurred (make sure that the oven door is shut). Once the
WARN:OVEN SHUT OFF is displayed, the oven temperature will remain off until the message is
cleared. The operator need only to press the
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SVC 1-8
PART COPERATOR INSTIGATED INDICATIONS
This section discusses the visual information that the operator can instigate and use as part of the trou-
bleshooting process. These visual indications are normally not available unless specifically requested
by the operator.
There are several functions of the CALIB AND TEST (Clear Dot) modes that can be used as adiagnos-
tic tool. Similarly,the TEST CHROMATOGRAM can be extremely useful. Each of these operator insti-
gated functions is specifically designed to aid the overall troubleshooting process and is activated from
the keyboard.
Of the ten functions accessible through the CALIB AND TEST (Clear Dot), five may be thought of as
servicing functions. The other five functions are generally thought of as operational functions. These are
explained in the operation and reference manuals.
To enter any of the CALIB AND TEST (Clear Dot) modes, press: the Clear key,the Decimal key and a
number from 0through 9. The actual digits 4,5,7,8,9 represent the typical test modes. These are as
follows:
CLEAR DOT 4DISPLAYMEMORY
CLEAR DOT 5SELFTEST
CLEAR DOT 7HPIL LOOPBACK TEST
CLEAR DOT 8SET PID CONTROLS
CLEAR DOT 9DISP TEMP &DEMAND
To escape from any of the CALIB AND TEST (Clear Dot) modes press any of the instrument function
keys.
Calib and Test (Clear Dot 4) Display Memory
This diagnostic routine is initiated from the keyboard by pressing: Upon entering this mode, asingle
memory address (ADDR:) and avalue (VAL:) will appear on the instrument front panel visual display.
At this time, both the address and the value will be displayed in hexadecimal. In this hexadecimal
mode, the value displayed is two bytes (four digits) of information. The rightmost two digits (one byte)
represent the actual contents of the indicated address. The other two digits correspond to the contents
of the next address. For example, if address 1111 were keyed in and the value F224 resulted, 24 is
the contents of address 1111 and F2 is the contents of address 1112. This could be verified by ad-
dressing 1112; then the F2 would become the two rightmost digits (i.e., 3DF2).
In the Display Memory mode, some keys on the keyboard are redefined:
Akey becomes Ain hexadecimal.
Bkey becomes Bin hexadecimal.
COL COMP1 key becomes Cin hexadecimal.
COL COMP2 key becomes Din hexadecimal.
ON key becomes Ein hexadecimal.
OFF key becomes Fin hexadecimal.
The Decimal Point key increments the address.
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SVC 1-9
The Minus key decrements the address.
The ENTER key switches the type of value presentation. The binary display mode can be entered from
the hexadecimal mode by pressing .If already in the binary mode, it will return to the hexadecimal
mode.
The binary mode is very similar to the hexadecimal mode except that the value of the address, and only
that value (one byte), is displayed in the binary code. If the next value (one byte in binary) is desired,
simply increment the address, which is always displayed in hexadecimal. The incrementing and decre-
menting of addresses in the binary mode are done in the same manner as in the hexadecimal mode.
To leave this Display Memory routine, press any of the instrument function keys. This also reestablishes
the normal key definitions.
Calib and Test (Clear Dot 5) SelfTest
This instrument test is exactly the same as the one that occurs automatically at power turn on, except it
is entered whenever the operator decides. It is initiated from the keyboard by pressing: The first indica-
tion auser has that the instrument is working is when the unit tests its RAM (Random Access Memory)
and the visual display portion of the front panel. The entire visual display (all possible dots) and all LEDs
turn on for afew seconds.
The next indication is when the unit displays TESTING MEMORY.During this time, the unit tests most
of the processor memory (ROM) circuits. Note that during this time only the NOT READYLED remains
lit.
The third indication is when the unit displays TESTING SIGNAL PATH. During this phase of the selftest,
the unit actually exercises most of the signal handling sections of the Main Board. Note that the analog
sensors (i.e., temperature sensors) are NOT tested at this time; they are tested after the selftest. How-
ever,by linking the A/D through the CPU to the D/A and by looping the D/A output back as an input to
the A/D,most of the Main Board’ssignal handling circuits are checked.
The fourth (and unless an error is found, the final) indication is the PASSED SELFTEST message. This
message verifies that the selftest sequence has been completed. The PASSED SELFTEST display re-
mains until some further action is taken by the operator or some area not tested during the SelfTest is
detected.
By pressing the clear key,the visual display should change to some message about OVEN TEMP.This
action, with its resulting message, verifies that the keyboard is communicating with the CPU.
Calib and Test (Clear Dot 7)
HPIL Loopback Test This diagnostic test requires that one of the HPIL cables be connected from the
OUT to the IN. The test is then initiated from the keyboard by pressing: By entering this test, 128 frames
will be transmitted from the CPU through the Communications Interface Board. With the HPIL cable in-
stalled, the same word should be transmitted back to the Z80 processor,sensed and compared with
the transmitted word. If the comparison verifies correct transmission and reception, aPASSED SELF-
TEST message will be displayed on the instrument’sfront panel visual display.Note that this is the
HPIL SelfTest and is not the same as the instrument SelfTest done at power turn on.
If acomponent failure exists in the HPIL circuitry,or if either the Interface Board or HPIL Cable is not
properly installed, aFAILED SELFTEST message will be displayed.
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SVC 1-10
To leave this mode of testing, press any of the instrument function keys.
Calib and Test (Clear Dot 8) Set PID Controls
Calib and Test (Clear Dot 9) Disp Temp &Demand
Test Chromatogram Signal Output Test
This diagnostic test is selected from the keyboard by pressing One of the signal selection keys either
SIG 1or SIG 2and the 9key on the numeric key pad and the ENTER key.Test plot mode is confirmed
by the display showing SIGNAL 1(or 2) TEST PLOT.Pressing SIG 1(or 2) asecond time displays
the current signal level value (which is 0.0 initially). This permits monitoring the output signal.
The test chromatogram, which is permanently stored in the HP 5890 SERIES II, is initiated by pressing
the START key.Each chromatographic cycle consists of three peaks. Each peak is about 1/10 the
height of the previous peak, with the first (tallest) peak having aheight value of about 125 mV at =0
(+1 Vanalog output); halfheight width of this peak is about 0.13 minutes. Each cycle is about 1.5 min-
utes in length. The chromatogram will continue to cycle until the STOP key is pressed. The test chroma-
togram is useful as atroubleshooting aid in deciding whether alost or noisy signal observed at acon-
nected integrating or chart recording device is due to achromatographic problem (lost sample due to
leaks, noise due to adirty detector,etc.), versus problems either with the integrating/recording device
itself,or in its connecting cables.
If the test chromatogram does not exhibit any problems at the integrating/recording device, achromato-
graphic problem is likely to exist; if the test chromatogram exhibits noise, or does not appear at all, the
problem is most likely to be hardware related. Check setpoints on both the HP 5890 SERIES II and the
integrating/recording device.
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SVC 1-11
PART DFUNCTIONAL SYMPTOMS
This section contains symptoms (other than those that appear on the visual display) that indicate apos-
sible problem. Typically,these types of symptoms can be associated with aspecific functional area of
the instrument.
Zone doesn’theat all other zones O.K.
With an Ohm meter measure the resistance of the cartridge heater (should be about 200-220 ohms).
With the power removed this can be measured by removing the J9 connector for INJA,INJB, DETA,
and DETB. To measure the AUX zone remove the J14 connector.The pins are labeled on the main
board next to the appropriate Jconnector.Replace the cartridge heater if it is open or shorted. If the
cartridge heater tests O.K.and sensor test O.K.(see temperature sensor resistance chart), the problem
is in the zone control on the main board and the main board should be replaced. To measure resis-
tance of sensors remove connector P7, sensors are labeled on main PCB.
Zone temperature is unstable.
If Zone will not reach desired temperature or cycles over more then plus or minus 1degree Cthen the
insulation around the zone and the insulation of the oven shell should be examined and additional insu-
lation added if necessary.Also refer to the operating manual to verify the zone is being used proper-
ly(i.e., oven at -50 degrees C, injection port at 100 degrees C). This type of operation will not work.
The Main Board is generally serviced from areplacement aspect, the introduction includes an illustra-
tion of its functional configuration followed by information about its connectors and test points.
Any replacement or space electrical parts that are subject to damage by static electricity will be shipped
in static-protective bags or containers. Be certain to utilize these protective devices when storing items
of this nature.
Generally,since board or module replacement constitutes the majority of electronic repairs, the only
electronic test equipment necessary is aquality Volt Ohm Ampmeter.
The HP 5890 Series II GC contains aminimum of four and amaximum of nine electronic boards. The
four boards always installed are one of the AC Power Boards, the Keyboard and Display Board(usually
done as one module), and the Main Board. The actual AC Power Board located in the rear of the instru-
ment behind the column oven compartment is one of three possible boards based on the voltage and
phase configuration of the line. The Keyboard and Display Board are two boards located on the front of
the Electronics Module. The Keyboard plugs directly into the Display Board. The Main Board is
mounted inside the right side panel of the instrument and occupies most of the space in the Electronics
Module. More importantly,the Main Board contains most of the instrument’selectronics.
General Description:
The 05890-60015 PC board is acollection of circuits which allow operation of the 5890 Series II gas
chromatograph. The circuits on the new board include power supplies, CPU,A/D converter,D/A con-
verter,clocks and general control circuits. (Refer to the main PCB diagrams, pages SVC 1-12 and
SVC 1-13.)
The functions provided by the new PC board are the same as those provided by the original HP 5890A
GC except that components have been added to control an additional heated zone and 2AC valves.
The new board differs only in its implementation of these functions. The foremost change is the use of
a 68 pin PLCC custom IC which performs the same functions as do 26 TTL IC’son the original
05890-60010 board
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SVC 1-12
Connectors 1thru 15 are used to connect the Main Board either with the other electronic assemblies
within the instrument or external devices, such as an integrator.(Refer to the main PCB diagrams,
pages SVC 1-13 and SVC 1-14. Refer to appendix aof this document for information on the main
PCB connectors.)
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SVC 1-13
DC POWER SUPPLY
PROCESSOR
CLOCKS
AND TIMING
KEYBOARD
DETECTORS DAC A/D VALVES AND CRYO
HEATED
ZONES
AND
TRIACS
MAIN PCB FUNCTIONAL ZONES
AC POWER SUPPLY
TEST POINTS
TEST POINTS
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