To Next Page

To Previous Page

GE HEALTHCARE

DIRECTION 2307224-100, REVISION 6DISCOVERY LS SYSTEM SERVICE MANUAL

Page 40 Chapter 1 - Preface

WARNING WARNINGS ARE USED TO IDENTIFY CONDITIONS OR ACTIONS FOR WHICH A SPECIFIC

HAZARD IS KNOWN TO EXIST, WHICH MAY CAUSE SEVERE PERSONAL INJURY, DEATH

OR SUBSTANTIAL PROPERTY DAMAGE IF THE INSTRUCTIONS ARE IGNORED.

CAUTION Cautions are used to identify conditions or actions for which a potential hazard may exist,

which will or can cause minor personal injury or property damage if the instructions are

ignored.

1.6.2 IEC Symbols

The system may have labels with one or more of the following symbols. These symbols indicate the

IEC standards to which the system conforms.

Symbol IEC Standard

Alternating Current

Protective Earthing Point

ON / Power

OFF / Power OFF

Input Power

Output Power

Functional Earth Ground

Warning, Caution - consult accompanying documents

Electrical Shock Hazard

Chapter 1 Preface33
- Default Chapter13
  - Table of Contents13
  - Direction 2307224-100, Revision Discovery Ls System Service Manual32
Scope of this Manual33
Manual Set33
Referenced Documents33
Required Skill Set and Tools34
- Training Requirements (Skill Set Required)34
  - Tools Required35
  - Direction 2307224-100, Revision Discovery Ls System Service Manual35
System Lock-Out and Tag-Out (LOTO)36
- Thermal Energy36
- Electrical Energy37
- Removing Power from the System37
  - Restoring Power to the System37
  - Figure 1-1: A1 Disconnect Panel with LOTO Applied37
- Gantry Rotation (Mechanical and Gravitational Energy)38
  - Disable Gantry Rotation38
General Safety Guidelines39
- General Safety Definitions39
Regulatory Information42
- Standard Compliance42
Chapter 2 Discovery LS System Safety Information43
CT System Safety43
Normal CT System Operational Safety43
- Potential Hazards43
- Irection Evision Iscovery Ls System Ervice Anual43
- Safety Awareness Indicators44
- Emergency Switches, Buttons and Locks45
CT Equipment Service48
- CT Gantry48
  - CT Gantry General48
- CT Mechanical Hazards54
Chemicals and Materials58
- Slip-Ring Brush Dust and Debris58
- Clean-Up and Personal Hygiene59
Table60
- Electrical Hazards60
- Mechanical Hazards61
  - Chemical Hazards61
Console (H3 or GOC1)61
- Figure 2-20: Table Touch Sensor Jumpered out61
- Figure 2-21: H3 Console On/Off Power Switch (Front Cover Removed)61
Power Distribution Units62
- Compact Power Distribution Unit (CPDU)62
- New Global Power Distribution Unit (NGPDU)64
- Mechanical Hazards66
PET System Safety66
- General66
- Laser Related Labels72
CT-PET System Safety74
- CT-PET Gantry Safety74
  - Clearance between Gantries in Service Position74
- CT-PET Table Safety76
- CT-PET Safety Labels78
Chapter 3 DLS System Functional Description79
Introduction79
CT Overview and Functionality79
- Figure 3-1: Discovery LS System79
- Pdu80
- Data Acquisition System80
PET Overview and Functionality81
- Electronic Cabinet81
- Gantry81
- Detector Ring82
- Pcu82
- Power Switch Box82
- Gantry Motion Control Board Rack82
Electrical Requirements82
Patient Table83
PET Service Access83
CT-PET LAN (Local Area Network)83
- Figure 3-2: Patient Table83
- Figure 3-3: Original CT and PET Network84
- Figure 3-4: Integrated CT and PET Networks (Option 1)85
- Figure 3-5: Integrated CT and PET Networks (Option 2)86
- LAN Connections for Systems with Turbosharc87
- Figure 3-6: LAN Connections for Systems with Turbo SHARC87
- Figure 3-7: Turbo SHARC Cabinet Selections88
E-Stop Safety89
Covers89
- Figure 3-8: RS232 PET Connection with Turbo SHARC89
- Figure 3-9: Electrical Block Diagram90
- Figure 3-10: Data Flow / Control Block Diagram91
- Figure 3-11: Grounding Diagram92
System Start-Up93
- Powering up the PET Peripherals and Subsystems94
- Figure 3-12: PDU Circuit Breaker Switches94
- Switching to the PET User Interface Display on the Scan Monitor95
- Figure 3-13: Image Monitor Screen Showing PET and Exam Rx Icons on Desktop Selection Area95
System Shut-Down96
- Shutting down the PET-CT System96
- Figure 3-14: Desktop Selection Area Showing Shut-Down Button96
- Switching off Power to PET Subsystems and Peripherals97
- Figure 3-15: CT Computer97
- Figure 3-16: PET Computer97
- Shutting down the CT and PET Applications98
- Figure 3-17: PDU Circuit Breaker Switches98
- Figure 3-18: Desktop Selection Area Showing Service Button98
- Figure 3-19: Service Desktop Showing Utilities/Tools Menu99
- Resetting CT Subsystems100
- Figure 3-20: CT Service Desktop100
- Figure 3-21: System Reset Screen100
- Rebooting PET Subsystems101
Chapter 4 Service Desktop, Tools and Diagnostics103
Service Desktop103
- Figure 4-1: Service Desktop Icon103
- Figure 4-2: Service Desktop Home Page103
- Service Desktop Main Menu104
- Figure 4-3: Utilities Area and Menu104
- Service Desktop Functionality105
- Desktop Management105
- Irection Evision Iscovery Ls System Ervice Anual105
- Figure 4-4: Systems Reset106
Chapter 5 Console107
CT-PET Console Functional Description107
- Console107
- Figure 5-1: Locations of Console Components (H2 Shown)108
- Figure 5-2: Key Console Components (H2 Shown)108
Console Connections109
- Figure 5-3: Console Block Diagram (H2 Shown)109
Chapter 6 Table111
CT-PET Table Functional Description111
- Manual Table Functional Description111
Manual Table112
- Prerequisites112
  - Furnished Materials112
  - Required Tools112
- Before Beginning113
- Pre-Mechanical Installation113
- Mechanical Installation114
- Remove the Manual Control Hardware122
- Install the Automated Base Hardware132
- Install Table Secondary Base Covers189
- Finish the Mechanical Installation208
- Figure 6-137: Attach Back Cap to Motor Base208
- Figure 6-138: ME 1.5 Table Block Diagram209
- Completion210
- Figure 6-139: Gantry Keypad210
- Direction 2307224-100, Revision Discovery Ls System Service Manual211
- Figure 6-140: Hardware Configuration Panel211
- Figure 6-141: Final PET and CT Flag Adjustment212
- Manual Table Wiring213
- Figure 6-142: Adjust PET Flag213
- Figure 6-143: 2328900-2SCH213
- Figure 6-144: 2338513SCH214
Troubleshooting Tips215
- Potentiometer Counts Differ215
- CT-PET Position Latch Solenoid Fails to Engage216
  - Symptom216
  - Probable Causes and Suggestions216
- Delta Z Not in Spec216
- Clutch Engages - Motor Does Not Spin216
- Motor Spins - Clutch Does Not Engage216
- Gantry Does Not Run System Light Tests217
  - Symptom217
  - Probable Causes and Suggestions217
Procedures and Adjustments217
Replacement Procedures217
- Replacing the Secondary Base Timing Belt217
- Figure 6-146: Front Pulley217
- Replacing the Secondary Base Front Pulley218
- Figure 6-147: Timing Belt Clamp218
- Replacing the Secondary Base Motor219
- Figure 6-148: Secondary Base Motor - General View219
- Figure 6-149: Motor - View 2219
- Figure 6-150: Motor Assembly and Coupling Removed220
- Figure 6-151: Motor Showing Groove and Set Screw220
- Replacing the Secondary Base Motor Coupling221
- Replacing the Secondary Base Motor Clutch221
- Figure 6-152: Clutch Plates221
Chapter 7 Gantry223
CT-PET Gantry Functional Description223
- Mechanical Description223
- PET Gantry Field Upgrade Modifications223
- Electrical Description226
- Direction 2307224-100, Revision 6 Discovery Ls System Service Manual226
CT Gantry Field Replaceable Units (Frus)226
CT Gantry Replacement Procedures226
PET Gantry Field Replaceable Units (Frus)226
PET Gantry Replacement Procedures227
- PET Gantry Drive Mechanism Replacement (P/N 2290248)227
- Connecting External PET Cables & New CT-PET Cables to New A36-1, A36-2, A37-1239
- Replacement of the Short Positioning Pin (P/N 2287052)240
- Figure 7-21: Replacing the Short Positioning Pin #1240
- Figure 7-22: Replacing the Short Positioning Pin #2240
Procedures and Adjustments241
- Removing the Covers for PET Gantry Service Movement241
  - Activating the Driving Mechanism241
  - Figure 7-23: Removing Covers - Illustration 1241
Chapter 8 System QC, Calibration and Functional Tests243
System QC243
- CT-PET Volumetric Calibration and Quality Control Procedure (VQC)243
Chapter 9 Planned Maintenance (PM)259
Maintenance of Mechanical Components259
- Lubrication of PET Gantry Driving Mechanism260
- Checking the Timing Belts Adjustments and Tightness261
- Figure 9-1: Greasing the Linear Bearings261
Maintenance of Cables and Connectors262
Chapter 10 Electrical Connections263
Power and Data Cables Checklist263
- CT Electronics Cabinet263
- PET Electronics Cabinet264
- Discovery LS Console265
  - Manual Table Retractor Cables266
  - Automated and Extended Table Retractor Cables267
- Secondary Base Cables268
  - Manual Table Secondary Base Cables268
  - Automated and Extended Table Secondary Base Cables268
Table268
- CT Gantry Cables269
  - CT Gantry Cables - Manual Table269
  - CT Gantry Cables - Automated and Extended Table270
PET Gantry271
- Grounding Connections272
Wiring Diagrams272
- CT Cable Connections275
- Figure 10-2: CT System with H2 Interconnect Diagram (Manual Tables)275
- Figure 10-3: CT System with GOC1 & CPDU Interconnect Diagram (Manual Tables)276
- Figure 10-4: CT System with GOC1 & NGPDU Interconnect Diagram (Manual Tables)277
- Figure 10-5: Discovery LS CT Cables (Manual Tables)278
- Figure 10-6: CT System with H2 Interconnect Diagram (Automated Tables)279
- Figure 10-7: CT System with GOC 1 & CPDU Interconnect Diagram (Automated Tables)280
- Figure 10-8: CT System with GOC1 & NGPDU Interconnect Diagram (Automated Tables)281
- Figure 10-9: Discovery LS CT Cables (Automated Tables)282
- Figure 10-10: PET System Interconnections283
- PET Cable Connections283
- Figure 10-11: PET System Power Interconnections284
E-Stop Wiring285
- Figure 10-12: PET E-Stop Wiring285
- Figure 10-13: CT E-Stop Wiring286
Chapter 11 Replacement Parts287
PET Gantry287
- Figure 11-1: Gantry Rear View287
- Figure 11-2: Base Plate and Rollers289
- Figure 11-3: Linear Bearing Assembly and Adjusters290
- Figure 11-4: Positioning Pin291
- Figure 11-5: PET Gantry Retractor Assembly (Schematic Illustration Only)292
Table294
- Secondary Base Covers294
- Figure 6-112: Secondary Base Covers294
- Figure 11-6: Secondary Base Covers294
- Secondary Base Components295
- Figure 11-7: Secondary Base Components (1)295
- Figure 11-8: Secondary Base Components (2)296
- Direction 2307224-100, Revision Discovery Ls System Service Manual297
- Figure 11-9: Secondary Base Components (3)297
- Figure 11-10: Secondary Base Components (4)298
- Irection Evision Iscovery Ls System Ervice Anual300
- Figure 11-11: Table Retractor Components301
- Secondary Base Cables302
Covers303
- Figure 11-12: Discovery LS Covers - General View303
- Cover Sections and Components304
- Figure 11-13: Gantry Covers - Front/Side View304
- Figure 11-14: Gantry Covers - Side View305
- Figure 11-15: Front View Showing Control Keys, Front Display and Breathing Lights306
- Figure 11-16: Left and Right E-Stop Buttons and Source Indicators307
- Figure 11-17: Rear E-Stop Button and Source Indicator307
Brackets for the Covers - Required Parts309
- Brackets309
- Accessories310
Assembling the Covers310
Chapter 12 Troubleshooting311
System Software Operation Issues311
Manual Table Operation Issues316
- Clutch Fails to Engage/Disengage317
- Base Axis Does Not Move318
- Figure 12-1: KB Box Driver Board Fuses318
- Base Axis Moves Constantly319
- Base Axis Moves in One Direction Only319
- Base Axis Does Not Stop at the Limit Switch and Collides with Mechanical Stopper319
- Base Axis Stops at Limit Switch, but Workstation Displays Message: Move Table to CT319
- Figure 12-2: Discovery LS - Base Axis Wiring Diagram320
- Figure 12-3: Discovery LS CT Cables321
Automated Table Operation Issues322
- Clutch Fails to Engage/Disengage322
- Figure 12-4: Clutch Driver Unit (CDU)323
- Figure 12-5: Troubleshooting for Clutch Fails to Engage/Disengage (Automated Tables)324
- Base Axis Does Not Move325
- Figure 12-6: Solenoid, Locking Mechanism and CT Position Latch325
- Figure 12-7: Secondary Base Internal Wiring Diagram326
- Figure 12-8: Troubleshooting for Base Axis Movement (Automated Tables)327
- Base Axis Movement Malfunction328
- Base Axis Does Not Stop at the PET or CT Positions328
- Digits Disappear from Gantry Display328
- Figure 12-9: Discovery LS CT Cables (Automated Tables)329
Extended Cradle Table Operation Issues330
- Clutch Fails to Engage/Disengage331
- Figure 12-10: Troubleshooting for Clutch Fails to Engage/Disengage331
- Base Axis Does Not Move333
- Figure 12-12: Troubleshooting for Base Axis Does Not Move333
- Figure 12-13: Solenoid, Locking Mechanism and CT Position Latch334
- Figure 12-14: Base Axis Schematics (Extended Cradle Table)335
- Figure 12-11: Cradle Drive Unit336
- Figure 12-15: Cradle Axis Schematics (Extended Cradle Table)336
- Base Axis Movement Malfunction337
- Base Axis Does Not Stop at the PET or CT Positions337
- Digits Disappear from Gantry Display337
CT-PET Communication Difficulties Due to NULL Modem Cable338
Appendix A339
Illustrated Parts Breakdown339
System Drawings339
- Figure A-1: Discovery LS Gantry Assembly Drawing #1339
- Figure A-2: Discovery LS Gantry Assembly Drawing #2340
- Figure A-3: Discovery LS Linear Bearing Assembly and Adjuster Assembly340
Part Lists342
- Gantry and Cables342
- Base Casting342
- Legs343
- Linear Bearings343
- Driving Mechanism345
- Cabling346
Appendix B - System Calibration Quick Guide347
Daily Calibrations348
Weekly Calibrations350
Three Monthly Calibrations355

Brand	GE
Model	Discovery LS
Category	Medical Equipment
Language	English

GE Discovery LS User Manual

Table of Contents

Questions and Answers:

GE Discovery LS Specifications

Related product manuals