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GE H
EALTHCA
RE
D
IRECTION
2307224-100, R
EVISION
6D
ISCOVERY
LS S
YSTEM
S
ERVICE
M
ANUAL
Page 304
Chapter 11 - Replacement Parts
1
1.3.1 Cover Sections and Component
s
The Discovery LS CT and PET gan
try covers comprise the
sections and additio
nal components
that
are shown
in
Figure
11-13
,
Figure
1
1-14
,
Figure
11-15
,
Figure
1
1-16
, and
Figure
11-17
, and
detailed in
Table
11-11
and
Table
11-12
.
Figure 1
1-13:
Gantry Covers – Front/Side V
iew
13
14
3
10
9
2
7
8
1
6
5
4
303
305
Table of Contents
Chapter 1 Preface
33
Default Chapter
13
Table of Contents
13
Direction 2307224-100, Revision Discovery Ls System Service Manual
32
Scope of this Manual
33
Manual Set
33
Referenced Documents
33
Required Skill Set and Tools
34
Training Requirements (Skill Set Required)
34
Tools Required
35
Direction 2307224-100, Revision Discovery Ls System Service Manual
35
System Lock-Out and Tag-Out (LOTO)
36
Thermal Energy
36
Electrical Energy
37
Removing Power from the System
37
Restoring Power to the System
37
Figure 1-1: A1 Disconnect Panel with LOTO Applied
37
Gantry Rotation (Mechanical and Gravitational Energy)
38
Disable Gantry Rotation
38
Restore Gantry Rotation
38
Figure 1-2: Gantry Rotational Lock
38
Figure 1-3: Gantry Rotation Lock out
38
General Safety Guidelines
39
General Safety Definitions
39
IEC Symbols
40
General Hazards
41
General Electrical Hazards
41
General Electrical Precautions
41
General Unpacking Precautions
41
General Installation Safety Measures
42
Regulatory Information
42
Standard Compliance
42
Chapter 2 Discovery LS System Safety Information
43
CT System Safety
43
Normal CT System Operational Safety
43
Potential Hazards
43
Irection Evision Iscovery Ls System Ervice Anual
43
Safety Awareness Indicators
44
Labels
44
Lights and Lamps
44
Figure 2-1: Laser Light Warning and Regulatory Compliance Labels
44
Figure 2-2: X-Ray Icon
44
Figure 2-3: Gantry Display (Front) and X-Ray on Icon
44
Emergency Switches, Buttons and Locks
45
System Emergency off (E-Off) Switch
45
Figure 2-4: Operator Console and Gantry X-Ray Exposure Warning Lights
45
System Emergency Stop (E-Stop) Switches
46
Figure 2-5: Gantry E-Stop Button
46
Figure 2-6: Gantry E-Stop Reset Button
46
Figure 2-7: Console E-Stop Button
46
Figure 2-8: Table Tape Switches
47
Figure 2-9: Cradle Latch Button
47
Compact Power Distribution Cover Lock (CPDU Only)
48
CT Equipment Service
48
CT Gantry
48
CT Gantry General
48
Figure 2-10: CPDU Lock
48
CT Gantry Electrical
49
Figure 2-11: Gantry Slip-Ring Platter Cover
49
Figure 2-12: Gantry Electrical Hazard Labels
50
Safety Awareness Indicators
50
Figure 2-13: Gantry E-Stop and Service Outlets (Right Side of Gantry)
52
Service Outlet
52
Service Switches and Circuit Breakers
52
Figure 2-14: Location of STC Service Switches (Shown in off Position) and Leds
53
Gantry E-Stop
54
Power Pan Circuit Breaker
54
CT Mechanical Hazards
54
Figure 2-15: Power Pan Circuit Breaker
54
Fastener Torque Specifications
55
Figure 2-16: Rotational Lock Assembly
57
Figure 2-17: Rotational Lock Assembly Operation
57
Rotational Locking Pin
57
Front and Rear Cover Dollies
58
X-Ray Tube Hoist
58
Chemicals and Materials
58
Slip-Ring Brush Dust and Debris
58
Cleaning Equipment
58
Personal Protection Equipment (PPE)
58
Recommended Cleaning Procedure
58
Clean-Up and Personal Hygiene
59
Oils (Tube, Tank and Hydraulic)
59
Lead
59
Heat Sources
59
Table
60
Electrical Hazards
60
Safety Awareness Indicators
60
Service Outlet
60
Switches
60
Figure 2-18: Table Service Outlet and Safety Switches
60
Figure 2-19: Table Switches
60
Mechanical Hazards
61
Chemical Hazards
61
Console (H3 or GOC1)
61
Figure 2-20: Table Touch Sensor Jumpered out
61
Figure 2-21: H3 Console On/Off Power Switch (Front Cover Removed)
61
Power Distribution Units
62
Compact Power Distribution Unit (CPDU)
62
Figure 2-22: CPDU Front and Rear (Exposed View)
62
Circuit Breakers and Switches - CPDU
63
Figure 2-23: CPDU Power Lamp (CPDU Top Cover Opened and Latched)
63
Figure 2-24: CPDU Circuit Breakers
63
Hazard Awareness Indicators - CPDU
63
Protected Service Outlets - CPDU
63
Mechanical Hazards - None
64
New Global Power Distribution Unit (NGPDU)
64
Figure 2-25: Auxiliary Gantry Power Switch (CPDU Rear)
64
Figure 2-26: NGPDU Front and Rear (Exposed View)
64
Hazard Awareness Indicators - NGPDU
65
Protected Service Outlets - NGPDU
65
Figure 2-27: NGPDU Power Lamp
65
Figure 2-28: NGPDU Circuit Breakers
65
Circuit Breakers and Switches - NGPDU
66
Mechanical Hazards
66
PET System Safety
66
General
66
Safety Signal Definitions
66
Safety Labels
67
Electrical Safety Labels
67
Mechanical Motion Labels
71
Laser Related Labels
72
Radiation Safety Labels
73
Thermal Hazard
74
Rating Labels
74
CT-PET System Safety
74
CT-PET Gantry Safety
74
Clearance between Gantries in Service Position
74
Safety Measures While Moving PET Gantry
74
CT-PET Emergency Stops
75
Figure 2-29: CT Gantry E-Stop
75
CT-PET Table Safety
76
Figure 2-30: PET Gantry E-Stop
76
Figure 2-31: Secondary Base Drive Mechanism
77
Secondary Base Drive Mechanism Safety (Automated Tables)
77
CT-PET Safety Labels
78
Chapter 3 DLS System Functional Description
79
Introduction
79
CT Overview and Functionality
79
Figure 3-1: Discovery LS System
79
Pdu
80
Data Acquisition System
80
Image Processor
80
Stationary Computer and Axial Board
80
On-Board Controller
80
Axial Drive
80
Slip-Ring Infrastructure
81
PET Overview and Functionality
81
Electronic Cabinet
81
Magic
81
Sharc
81
Irection Evision Iscovery Ls System Ervice Anual
81
Pdu
81
Gantry
81
Detector Ring
82
Pcu
82
Power Switch Box
82
Gantry Motion Control Board Rack
82
Electrical Requirements
82
Patient Table
83
PET Service Access
83
CT-PET LAN (Local Area Network)
83
Figure 3-2: Patient Table
83
Figure 3-3: Original CT and PET Network
84
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 Turbosharc
87
Figure 3-6: LAN Connections for Systems with Turbo SHARC
87
Figure 3-7: Turbo SHARC Cabinet Selections
88
E-Stop Safety
89
Covers
89
Figure 3-8: RS232 PET Connection with Turbo SHARC
89
Figure 3-9: Electrical Block Diagram
90
Figure 3-10: Data Flow / Control Block Diagram
91
Figure 3-11: Grounding Diagram
92
System Start-Up
93
Powering up the PET Peripherals and Subsystems
94
Figure 3-12: PDU Circuit Breaker Switches
94
Switching to the PET User Interface Display on the Scan Monitor
95
Figure 3-13: Image Monitor Screen Showing PET and Exam Rx Icons on Desktop Selection Area
95
System Shut-Down
96
Shutting down the PET-CT System
96
Figure 3-14: Desktop Selection Area Showing Shut-Down Button
96
Switching off Power to PET Subsystems and Peripherals
97
Figure 3-15: CT Computer
97
Figure 3-16: PET Computer
97
Shutting down the CT and PET Applications
98
Figure 3-17: PDU Circuit Breaker Switches
98
Figure 3-18: Desktop Selection Area Showing Service Button
98
Figure 3-19: Service Desktop Showing Utilities/Tools Menu
99
Resetting CT Subsystems
100
Figure 3-20: CT Service Desktop
100
Figure 3-21: System Reset Screen
100
Rebooting PET Subsystems
101
Chapter 4 Service Desktop, Tools and Diagnostics
103
Service Desktop
103
Figure 4-1: Service Desktop Icon
103
Figure 4-2: Service Desktop Home Page
103
Service Desktop Main Menu
104
Figure 4-3: Utilities Area and Menu
104
Service Desktop Functionality
105
Desktop Management
105
Irection Evision Iscovery Ls System Ervice Anual
105
Figure 4-4: Systems Reset
106
Chapter 5 Console
107
CT-PET Console Functional Description
107
Console
107
Figure 5-1: Locations of Console Components (H2 Shown)
108
Figure 5-2: Key Console Components (H2 Shown)
108
Console Connections
109
Figure 5-3: Console Block Diagram (H2 Shown)
109
Chapter 6 Table
111
CT-PET Table Functional Description
111
Manual Table Functional Description
111
Manual Table
112
Prerequisites
112
Furnished Materials
112
Required Tools
112
Before Beginning
113
Pre-Mechanical Installation
113
Mechanical Installation
114
Remove the Table Covers
114
Figure 6-1: Remove Metal Covers from the Secondary Base
114
Figure 6-2: Remove Secondary Base Front Roll-Up Cover
114
Figure 6-3: Remove the Table Side Covers
115
Figure 6-4: Remove the Side Elevator Covers
116
Figure 6-5: Remove the ETC Cover
117
Figure 6-6: Remove the Middle Support Bar and Bracket
117
Remove the Base Cover Brackets
118
Figure 6-7: Table Elevator/Tilt Drive Assembly
118
Figure 6-8: Remove Cover Brackets from ETC Chassis
118
Figure 6-9: Characterization Calibration Bracket
119
Figure 6-10: Calibration Bar with Tab
119
Figure 6-11: Remove the Tab from the Calibration Bar
120
Install the Mechanical Stop Assembly
121
Figure 6-12: Front and Rear Mechanical Stops
121
Remove the Manual Control Hardware
122
Remove the KB Box
122
Figure 6-13: Mechanical Stop Bracket (in Rear Stop Location)
122
Unfasten and Remove the Cables
123
Unfasten and Remove the KB Box
123
Figure 6-14: KB Box and Clutch Motor Assembly
123
Remove the Pedal Assembly
124
Remove the PET and CT Position Switches and Switch Rail
124
Figure 6-15: Remove Pedal from Table Rail
124
Figure 6-16: PET Position Switches (Shown with Pedal Assembly Attached to Rail)
124
Remove the Switch Rail
125
Figure 6-17: CT Position Switch
125
Figure 6-18: Cut Wires to Remove Switches and Cables
125
Disconnect and Discard the CT-PET Positions Cable (P/N 2318721)
126
Figure 6-19: ETC Board Locations
126
Remove the Cable Harness (P/N 2271256) from the Table
127
Figure 6-20: Old J8 Signal Harness
127
Remove the INTF SW and CL CONT I Cable (P/N 2309066) from the Table
128
Figure 6-21: Disconnect J7
128
Remove the Motor Clutch Assembly (P/N 2309067)
129
Figure 6-22: Mark the Secondary Base Drive Belt
129
Figure 6-23: Disassemble Secondary Base Positioning Belt
129
Assemble and Attach the Spreader Bar Assembly
130
Figure 6-24: Secondary Base Spreader Bar with Side Pieces
130
Figure 6-25: Secondary Base Spreader Bar Clamped into Place
131
Figure 6-26: Support Casting with Wood
131
Install the Automated Base Hardware
132
Drill and Tap the Right Secondary Base Rail
132
Figure 6-27: Remove Old Motor Clutch Assembly from Table Base
132
Determine the Right Secondary Base Rail Revision
133
Figure 6-28: Determine the Right Secondary Base Rail Revision
133
Attach the CT Template and Drill the Hole(S)
134
Figure 6-29: CT Drill Template Hole Labels (Viewed from the Rail Exterior)
134
Figure 6-30: Finish Tapping the "A" Holes
134
Figure 6-31: Fasten CT Drill Template to Right Rail Exterior
135
Determine the PET Detent Location
136
Attach the PET Template and Drill the Standard PET Detent Holes
137
Figure 6-32: PET Drill Template
137
Figure 6-33: PET Drill Template (Exterior View)
138
Fasten PET Detent Offset Template (P/N 2371258) to Revision 3 Rail
139
Figure 6-34: Fasten PET Detent Offset Template to Revision 3 Rail
139
Fasten the PET Detent Offset Template to the Revision 0, 1 or 2 Rail
140
Figure 6-35: Fasten PET Detent Offset Template to Revision 0, 1 or 2 Rail
140
Figure 6-36: Use M5 Washers as Stand-Offs
140
Drill a New Set of PET Detent Holes 10Mm Closer to the CT Detent
141
Drill a New Set of PET Detent Holes 20 MM Closer to the CT Detent
141
Figure 6-37: 10 MM Offset Drill Holes
141
Install the New Clutch Motor Assembly
142
Figure 6-38: 20 MM Offset Drill Holes
142
Figure 6-39: Support the Clutch Motor Assembly with Wood
142
Install the Table Bulkhead (if Necessary)
143
Figure 6-40: Install Table Bulkhead Bracket, P/N 2309772
143
Install the Base Axis Motor I Cable (P/N 2323724)
144
Figure 6-41: J5 Location on Cradle Tilt/Elevation Driver PCB
144
Install the Clutch Control I Cable (P/N 2340390)
145
Figure 6-42: Rear View of Table Bulkhead
145
Install Clutch Driver Unit (P/N 2340282)
146
Figure 6-43: Install Clutch Driver Unit
146
Figure 6-44: Clutch Driver Unit
146
Install the Clutch Driver Unit Power Cable (P/N 2338088)
147
Figure 6-45: Filter before Upgrade
147
Figure 6-46: Dual Connectors on P/N 2338088
147
Attach the Ground Wire (P/N 2338084) to the Clutch Driver Unit
148
Figure 6-47: Filter Connection to (Short) ETC ASM Side of Filter
148
Figure 6-48: Attach Ground Wire to Ground Bar
148
Replace the ETC Interface Board
149
Figure 6-49: ETC Interface Board
149
Install the Base CMD Adapter Cable (P/N 2338086)
150
Figure 6-50: Route P/N 2338086 under ETC Board
150
Figure 6-51: Cable P/N 2338086 CT-PET Position Latch Connection
150
Install the CT-PET Position Optical Sensor (P/N 2350570)
151
Figure 6-52: Trim Insulation from P/N 2350570 Connector
151
Figure 6-53: Route Optical Sensor Across ETC Board
151
Install the Base Driver Enable Ribbon Cable (P/N 2340386)
152
Figure 6-54: Tie off Old ETC I/F J8 Connector
152
Figure 6-55: Disconnect ETC Cables
152
Figure 6-56: Attach New Ribbon Cable to ETC I/F J4
153
Figure 6-57: Connect New Cable to J24
153
Figure 6-58: Connect New Ribbon Cable to Existing Ribbon Cable
154
Figure 6-59: Connect Existing Signal Harness to New Ribbon Cable in J24
154
Install Base CMD Adapter (P/N 2304737)
155
Figure 6-60: CMD Connector, P/N 2304737
155
Figure 6-61: ETC Board and ETC I/F
155
Figure 6-62: Attach Existing Signal Harness to J1 on CMD Adapter
156
Figure 6-63: Attach the CMD Adaptor to ETC I/F J7
156
Attach Flanges (P/N 2320158) to the Secondary Base
157
Figure 6-64: Attach Base CMD Adapter Cable to the J2 of CMD Adapter
157
Figure 6-65: Left Cover Flange with Adhesive Tie-Wrap Mounts
158
Attach Clutch Motor Cables
159
Figure 6-66: Attach Adhesive Mounts to Front of Table Rail
159
Figure 6-67: Clutch Motor Cables
159
Figure 6-68: Route Clutch Motor Cables Beneath Front of Table
160
Reassemble the Secondary Base Drive Belt
161
Figure 6-69: Base Potentiometer E Cable, P/N 2323729
161
Figure 6-70: Loosen Set Screws on Clutch Motor Pulley
161
Figure 6-71: Drive Belt Fastener Plate
162
Figure 6-72: Drive Belt Idler Pulley
162
Figure 6-73: Reassemble the Drive Belt
163
Set the Table Position Pot
164
Figure 6-74: Pot Pulley and Clutch Motor Pulley Set Screws
164
Attach the CT-PET Position Latch Mounting Plate
165
Figure 6-75: Linear Bearing Block
165
Figure 6-76: Determine Hardware Size
165
Install the PET-CT Position Latch Assembly
166
Figure 6-77: CT-PET Mounting Plate in Correct Orientation
166
Figure 6-78: CT-PET Position Latch Assembly, P/N 2340721
166
Figure 6-79: CT-PET Latch in Position
167
Install the CT and PET Detent/Flag Assemblies
168
Figure 6-80: CT and PET Detent/Flag Assembly Locations
168
If a PET Plug Is Required
169
Figure 6-81: Revisions 0, 1, and 2 Right Rails
169
Figure 6-82: PET Plug (Shown from Table Interior)
169
If a CT Plug Is Required
170
Figure 6-83: Revisions 0, 1, and 2 Right Rails
170
Figure 6-84: CT Plug
170
Install the CT Detent and Flag Assembly
171
Figure 6-85: CT Detent/Flag Assembly
171
Install the PET Detent and Flag Assembly
172
Figure 6-86: PET Detent/Flag Assembly
172
Assemble and Install PET Detent Adjuster
173
Figure 6-87: Adjust PET Detent for Recorded Distance between Scan Planes
173
Figure 6-88: PET Detent Adjuster, P/N 2332092
173
Shim the PET Detent Assembly
174
Figure 6-89: PET Detent Adjuster Fastened into Place
174
Figure 6-90: Check Relationship between Roller Arm and Pin out of Detent
175
Figure 6-91: Check the Relationship between the Roller Arm and Pin on the Detent
175
Figure 6-92: Check Relationship between Roller Arm and Pin in the Detent
176
Install Optical Sensor (P/N 2350570)
177
Figure 6-93: Fasten Optical Sensor with One Screw
177
Figure 6-94: Swing the Optical Sensor into Place
177
Figure 6-95: Align the Optical Sensor to the Flag
178
Align the Flag Plates to the Optical Sensor
179
Figure 6-96: Mark the Flag
179
Figure 6-97: Center the Flag
179
Install the Table Latch
180
Figure 6-98: Table Latch Assembly
180
Figure 6-99: Adjust the Set Screw for 90 Degrees
180
Figure 6-100: Fasten Service Latch to Table Rail with Three Sets of M5 Hardware
181
Adjust the Table Latch
182
Figure 6-101: Adjust CT Position Assembly to Clear Table Latch Arm
182
Figure 6-102: Correctly Adjusted Position Latch Arm
182
Figure 6-103: Reposition the Solenoid
183
Figure 6-104: Check Latch Clearance in "Energized" Position
183
Figure 6-105: Adjust the Solenoid Spring
184
Figure 6-106: Latch in Service Position
184
Install the New Characterization Bracket
185
Figure 6-107: New Characterization Bracket
185
Install the Top Cover Brackets
186
Figure 6-108: Install Three Top Cover Brackets
186
Install the Fourth Top Cover Bracket
187
Dress the Rest of the Cables and Close the ETC
187
Figure 6-109: Install Top Cover Bracket, P/N 233371
187
Install the Cosmetic Cradle Caps
188
Figure 6-110: Install Ten Cosmetic Cradle Caps, P/N 46-221523P10
188
Install Table Secondary Base Covers
189
Automated Table Cover Components
189
Figure 6-111: Automated Table Covers
189
Install the Roller Cover Assembly
191
Attach the Roller Cover Guides to the Secondary Base Side Rails
191
Figure 6-113: Assemble the Roller Cover Guides
191
Figure 6-114: Secondary Base Side Rail Slot Locations
192
Figure 6-115: Fasten Roller Cover Guides into Place
192
Attach the Cover Bracket to the Secondary Base
193
Figure 6-116: Install the Roller Cover Bracket
193
Figure 6-117: Roller Cover Bracket, P/N 2332803
193
Reposition the Ground Bus Bar
194
Figure 6-118: Align Cover Bracket with Cover Guide
194
Figure 6-119: Reposition the Ground Bus Bar
194
Attach Canister Brackets to Head End of the Secondary Base
195
Figure 6-120: Canister Bracket Assembly (with and Without Canister)
195
Attach the Drip Trough to the Roller Canister Assembly
196
Figure 6-121: Attach Drip Trough, P/N 2333438
196
Attach the Roller Cover Canister to the Secondary Base
197
Figure 6-122: Roller Canister in Place (P/N 2331848)
197
Install the Idler Roller and Align It to the Roller Cover Guides
198
Figure 6-123: Inset Idler Roller (P/N 2331418) into Slot in Table Base
198
Figure 6-124: M4 Hardware Holds Idler Roller in Place
198
Figure 6-125: Align Idler Roller to Roller Cover Guides
199
Figure 6-126: Use a Screwdriver to Pull Cover out of Canister
199
Figure 6-127: Check Cover Clearances
200
Fasten the Side Skirts to the Secondary Base
201
Figure 6-128: Side Cover - Back View to Show Guide Pins
201
Figure 6-129: Side Covers - Exploded View
202
Attach the Interface Cover between the DLS Table and Gantry
203
Figure 6-130: Secondary Base with Side Covers and Roller Cover Open
203
Figure 6-131: Interface Cover
203
Fasten the Rear Covers to the Secondary Base
204
Figure 6-132: Square the Table Top Cover
204
Figure 6-133: Top Cover Fastened into Place
204
Attach the Top Cap Assembly to the Secondary Base
205
Figure 6-134: Table Top Cap Assembly (P/N 2320161)
205
Attach the Back Cap to the Foot End of the Secondary Base
206
Figure 6-135: Attach the Back Cover Brackets to the Secondary Base
206
Figure 6-136: Back Cap (P/N2320164) Rear View W/ Profile Bracket
207
Finish the Mechanical Installation
208
Figure 6-137: Attach Back Cap to Motor Base
208
Figure 6-138: ME 1.5 Table Block Diagram
209
Completion
210
Figure 6-139: Gantry Keypad
210
Direction 2307224-100, Revision Discovery Ls System Service Manual
211
Figure 6-140: Hardware Configuration Panel
211
Figure 6-141: Final PET and CT Flag Adjustment
212
Manual Table Wiring
213
Figure 6-142: Adjust PET Flag
213
Figure 6-143: 2328900-2SCH
213
Figure 6-144: 2338513SCH
214
Troubleshooting Tips
215
Potentiometer Counts Differ
215
Symptom
215
Probable Causes and Suggestions
215
Figure 6-145: Clutch Motor and Base Position Potentiometer
215
CT-PET Position Latch Solenoid Fails to Engage
216
Symptom
216
Probable Causes and Suggestions
216
Delta Z Not in Spec
216
Clutch Engages - Motor Does Not Spin
216
Motor Spins - Clutch Does Not Engage
216
Gantry Does Not Run System Light Tests
217
Symptom
217
Probable Causes and Suggestions
217
Procedures and Adjustments
217
Replacement Procedures
217
Replacing the Secondary Base Timing Belt
217
Figure 6-146: Front Pulley
217
Replacing the Secondary Base Front Pulley
218
Figure 6-147: Timing Belt Clamp
218
Replacing the Secondary Base Motor
219
Figure 6-148: Secondary Base Motor - General View
219
Figure 6-149: Motor - View 2
219
Figure 6-150: Motor Assembly and Coupling Removed
220
Figure 6-151: Motor Showing Groove and Set Screw
220
Replacing the Secondary Base Motor Coupling
221
Replacing the Secondary Base Motor Clutch
221
Figure 6-152: Clutch Plates
221
Chapter 7 Gantry
223
CT-PET Gantry Functional Description
223
Mechanical Description
223
PET Gantry Field Upgrade Modifications
223
Gantry Transport Mechanism
224
Figure 7-1: Gantry Transport Mechanism
224
Gantry-Table Cable Routing
225
Gantry Covers
225
Moving the PET Gantry to Service Position
225
System Calibration
225
Figure 7-2: Table Retractors
225
Electrical Description
226
Direction 2307224-100, Revision 6 Discovery Ls System Service Manual
226
CT Gantry Field Replaceable Units (Frus)
226
CT Gantry Replacement Procedures
226
PET Gantry Field Replaceable Units (Frus)
226
PET Gantry Replacement Procedures
227
PET Gantry Drive Mechanism Replacement (P/N 2290248)
227
Figure 7-3: PET Gantry Drive Mechanism
227
Figure 7-4: Driving Mechanism - Internal Assembly
227
Figure 7-5: PET Gantry Drive Mechanism Sub-Assemblies (View 1)
228
Figure 7-6: PET Gantry Drive Mechanism Sub-Assemblies (View 2)
229
Figure 7-7: Driving Mechanism - External Assembly
230
Figure 7-8: PET Gantry Drive Mechanism Sub-Assemblies (View 3)
230
Figure 7-9: Retractor Assembly
231
Gantry Cables or Retractor Replacement
231
Figure 7-10: Retractors Mechanical Connection (General View 1)
232
Figure 7-11: Retractors Mechanical Connection (General View 2)
232
Figure 7-12: External Retractor Cables Cross Section
233
Replacing the External Retractor or Its Cables
233
Figure 7-13: Placing Cable Inside Retractor
234
Figure 7-14: External Retractor Connected to Legs Crossbeam
235
Figure 7-15: External Retractor and Cables
235
Figure 7-16: Internal Retractor Cables
236
Replacing the Internal Retractor or Its Cables
236
Figure 7-17: External and Internal Retractors Connected to Legs Crossbeam
238
Figure 7-18: Internal Retractor and Cables
238
Connecting External PET Cables & New CT-PET Cables to New A36-1, A36-2, A37-1
239
Panels
239
Figure 7-19: External Cables Connections to A36-1 and A37-1 Brackets
239
Figure 7-20: Power Cable Connections to A36-2 Bracket
239
Replacement of the Short Positioning Pin (P/N 2287052)
240
Figure 7-21: Replacing the Short Positioning Pin #1
240
Figure 7-22: Replacing the Short Positioning Pin #2
240
Procedures and Adjustments
241
Removing the Covers for PET Gantry Service Movement
241
Activating the Driving Mechanism
241
Figure 7-23: Removing Covers - Illustration 1
241
Chapter 8 System QC, Calibration and Functional Tests
243
System QC
243
CT-PET Volumetric Calibration and Quality Control Procedure (VQC)
243
Initial Table Alignment
243
Reset the Software Alignment Parameters
244
Positioning the VCQ Phantom
244
Figure 8-1: VQC Phantom
244
Scanning and Reconstructing the VQC Phantom
245
Figure 8-2: Exam Rx Desktop
245
Figure 8-3: New Patient Icon
245
Figure 8-4: Patient Information Screen
246
Figure 8-5: Selecting the Protocol
247
VQC Processing and Software Realignment
248
Figure 8-6: Initial Volumetric QC Panel
248
Figure 8-7: Images Database Navigator
248
Figure 8-8: Images Database Navigator Showing Image Sets List
249
Figure 8-9: Image Alignment Table
249
Mechanical Alignment Table
251
Figure 8-10: VQC Results Report - Mechanical Calibration
251
Options
252
Aligning the Table
252
Gantry Alignment Prerequisites
253
Figure 8-11: PET Positioning Block Adjustment
253
Figure 8-12: Driving Assembly Holding Bracket
253
Figure 8-13: High-Load Rollers
254
Figure 8-14: Linear Bearing Assembly Adjuster Screws and Baseplate Screws
254
Preparing the Gantry for Adjustment
254
Figure 8-15: Securing Screws on Rollers
255
Figure 8-16: Adjuster Locking Rings
255
Aligning the Gantry
256
Figure 8-17: Spherical Washers
256
Figure 8-18: Mechanical Stoppers Adjustment Screws
257
Chapter 9 Planned Maintenance (PM)
259
Maintenance of Mechanical Components
259
Lubrication of PET Gantry Driving Mechanism
260
Overview of Maintenance and Lubrication Procedure
260
Quantity and Frequency of Lubrication
260
Lubrication Kit
260
Greasing the PET Gantry Linear Bearings
261
Greasing the High Load Rollers Linear Guide
261
Greasing the Secondary Base Linear Bearings
261
Checking the Timing Belts Adjustments and Tightness
261
Figure 9-1: Greasing the Linear Bearings
261
Maintenance of Cables and Connectors
262
Chapter 10 Electrical Connections
263
Power and Data Cables Checklist
263
CT Electronics Cabinet
263
PET Electronics Cabinet
264
Discovery LS Console
265
Manual Table Retractor Cables
266
Automated and Extended Table Retractor Cables
267
Secondary Base Cables
268
Manual Table Secondary Base Cables
268
Automated and Extended Table Secondary Base Cables
268
Table
268
CT Gantry Cables
269
CT Gantry Cables - Manual Table
269
CT Gantry Cables - Automated and Extended Table
270
PET Gantry
271
Grounding Connections
272
Manual Table Grounding Connections
272
Automated and Extended Table Grounding Connections
273
Figure 10-1: Discovery LS Grounding Connections (Manual and Automated Tables)
274
Wiring Diagrams
272
CT Cable Connections
275
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 Interconnections
283
PET Cable Connections
283
Figure 10-11: PET System Power Interconnections
284
E-Stop Wiring
285
Figure 10-12: PET E-Stop Wiring
285
Figure 10-13: CT E-Stop Wiring
286
Chapter 11 Replacement Parts
287
PET Gantry
287
Figure 11-1: Gantry Rear View
287
Figure 11-2: Base Plate and Rollers
289
Figure 11-3: Linear Bearing Assembly and Adjusters
290
Figure 11-4: Positioning Pin
291
Figure 11-5: PET Gantry Retractor Assembly (Schematic Illustration Only)
292
Table
294
Secondary Base Covers
294
Figure 6-112: Secondary Base Covers
294
Figure 11-6: Secondary Base Covers
294
Secondary Base Components
295
Figure 11-7: Secondary Base Components (1)
295
Figure 11-8: Secondary Base Components (2)
296
Direction 2307224-100, Revision Discovery Ls System Service Manual
297
Figure 11-9: Secondary Base Components (3)
297
Figure 11-10: Secondary Base Components (4)
298
Irection Evision Iscovery Ls System Ervice Anual
300
Figure 11-11: Table Retractor Components
301
Secondary Base Cables
302
Covers
303
Figure 11-12: Discovery LS Covers - General View
303
Cover Sections and Components
304
Figure 11-13: Gantry Covers - Front/Side View
304
Figure 11-14: Gantry Covers - Side View
305
Figure 11-15: Front View Showing Control Keys, Front Display and Breathing Lights
306
Figure 11-16: Left and Right E-Stop Buttons and Source Indicators
307
Figure 11-17: Rear E-Stop Button and Source Indicator
307
Brackets for the Covers - Required Parts
309
Brackets
309
Accessories
310
Assembling the Covers
310
Chapter 12 Troubleshooting
311
System Software Operation Issues
311
Manual Table Operation Issues
316
Clutch Fails to Engage/Disengage
317
Base Axis Does Not Move
318
Figure 12-1: KB Box Driver Board Fuses
318
Base Axis Moves Constantly
319
Base Axis Moves in One Direction Only
319
Base Axis Does Not Stop at the Limit Switch and Collides with Mechanical Stopper
319
Base Axis Stops at Limit Switch, but Workstation Displays Message: Move Table to CT
319
Figure 12-2: Discovery LS - Base Axis Wiring Diagram
320
Figure 12-3: Discovery LS CT Cables
321
Automated Table Operation Issues
322
Clutch Fails to Engage/Disengage
322
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 Move
325
Figure 12-6: Solenoid, Locking Mechanism and CT Position Latch
325
Figure 12-7: Secondary Base Internal Wiring Diagram
326
Figure 12-8: Troubleshooting for Base Axis Movement (Automated Tables)
327
Base Axis Movement Malfunction
328
Base Axis Does Not Stop at the PET or CT Positions
328
Digits Disappear from Gantry Display
328
Figure 12-9: Discovery LS CT Cables (Automated Tables)
329
Extended Cradle Table Operation Issues
330
Clutch Fails to Engage/Disengage
331
Figure 12-10: Troubleshooting for Clutch Fails to Engage/Disengage
331
Base Axis Does Not Move
333
Figure 12-12: Troubleshooting for Base Axis Does Not Move
333
Figure 12-13: Solenoid, Locking Mechanism and CT Position Latch
334
Figure 12-14: Base Axis Schematics (Extended Cradle Table)
335
Figure 12-11: Cradle Drive Unit
336
Figure 12-15: Cradle Axis Schematics (Extended Cradle Table)
336
Base Axis Movement Malfunction
337
Base Axis Does Not Stop at the PET or CT Positions
337
Digits Disappear from Gantry Display
337
CT-PET Communication Difficulties Due to NULL Modem Cable
338
Appendix A
339
Illustrated Parts Breakdown
339
System Drawings
339
Figure A-1: Discovery LS Gantry Assembly Drawing #1
339
Figure A-2: Discovery LS Gantry Assembly Drawing #2
340
Figure A-3: Discovery LS Linear Bearing Assembly and Adjuster Assembly
340
Part Lists
342
Gantry and Cables
342
Base Casting
342
Legs
343
Linear Bearings
343
Driving Mechanism
345
Cabling
346
Appendix B - System Calibration Quick Guide
347
Daily Calibrations
348
Weekly Calibrations
350
Three Monthly Calibrations
355
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GE Discovery LS Specifications
General
Brand
GE
Model
Discovery LS
Category
Medical Equipment
Language
English
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