GE HEALTHCARE
DIRECTION 2307224-100, REVISION 6DISCOVERY LS SYSTEM SERVICE MANUAL
Table of Contents Page 19
6.2.10 Manual Table Wiring...................................................................................................... 213
Section 6.3
Troubleshooting Tips..................................................................................... 215
6.3.1 Potentiometer Counts Differ .......................................................................................... 215
6.3.1.1 Symptom ........................................................................................................ 215
6.3.1.2 Probable Causes and Suggestions................................................................ 215
6.3.2 CT-PET Position Latch Solenoid Fails to Engage ......................................................... 216
6.3.2.1 Symptom ........................................................................................................ 216
6.3.2.2 Probable Causes and Suggestions................................................................ 216
6.3.3 Table Base or Cradle Unlatches.................................................................................... 216
6.3.3.1 Symptom ........................................................................................................ 216
6.3.3.2 Probable Causes and Suggestions................................................................ 216
6.3.4 Delta Z Not in Spec........................................................................................................ 216
6.3.4.1 Symptom ........................................................................................................ 216
6.3.4.2 Probable Causes and Suggestions................................................................ 216
6.3.5 Clutch Engages - Motor Does Not Spin......................................................................... 216
6.3.5.1 Symptom ........................................................................................................ 216
6.3.5.2 Probable Causes and Suggestions................................................................ 216
6.3.6 Motor Spins - Clutch Does Not Engage......................................................................... 216
6.3.6.1 Symptom ........................................................................................................ 216
6.3.6.2 Probable Causes and Suggestions................................................................ 216
6.3.7 Gantry Does Not Run System Light Tests..................................................................... 217
6.3.7.1 Symptom ........................................................................................................ 217
6.3.7.2 Probable Causes and Suggestions................................................................ 217
Section 6.4
Procedures and Adjustments ....................................................................... 217
Section 6.5
Replacement Procedures .............................................................................. 217
6.5.1 Replacing the Secondary Base Timing Belt .................................................................. 217
6.5.2 Replacing the Secondary Base Front Pulley ................................................................. 218
6.5.3 Replacing the Secondary Base Motor ........................................................................... 219
6.5.4 Replacing the Secondary Base Motor Coupling ............................................................ 221
6.5.5 Replacing the Secondary Base Motor Clutch................................................................ 221
Chapter 7
Gantry ................................................................................................................... 223
Section 7.1
CT-PET Gantry Functional Description........................................................ 223
7.1.1 Mechanical Description.................................................................................................. 223
7.1.2 PET Gantry Field Upgrade Modifications ...................................................................... 223
7.1.2.1 Gantry Transport Mechanism......................................................................... 224
7.1.2.2 Gantry-Table Cable Routing .......................................................................... 225
7.1.2.3 Gantry Covers ................................................................................................ 225
7.1.2.4 Moving the PET Gantry to Service Position ................................................... 225
7.1.2.5 System Calibration ......................................................................................... 225
7.1.3 Electrical Description ..................................................................................................... 226
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