Hologic QDR 4500 Manuals

Manuals and User Guides for Hologic QDR 4500. We have 1 Hologic QDR 4500 manual available for free PDF download: Technical Manual

Hologic QDR 4500 Technical Manual (250 pages)

FAN BEAM X-RAY BONE DENSITOMETER

Brand: Hologic | Category: Medical Equipment | Size: 1 MB

Table of Contents
4
Section 1 Introduction
11
System Overview
11
X-Ray Scanning Theory
12
Figure 1-1. QDR 4500
12
Figure 1-2. Q Scan Plot
13
Functional Overview
14
Figure 1-3. QDR 4500 Block Diagram (Operator's Console)
14
Figure 1-4. QDR 4500 Block Diagram (Scanner Unit)
15
Figure 1-5. QDR 4500 Block Diagram (C-Arm Subsystem)
16
Product Specifications
18
BMD Precision
20
Duty Cycle
20
Leakage Technique Factors
20
Minimum Beam Filtration
20
Measured Half Value Layer (HVL) at Different Operating Potentials
21
Line Voltage and Maximum Line Current
21
Technique Factors for Maximum Line Current
21
Maximum Deviation
21
Measurement Criteria for Technique Factors
21
Section 2 Functional Description
23
Computer
23
Communications Controller Board
23
Interface Connections
23
Distribution Board
25
Power
25
Figure 2-1. Communications Controller Board/Distribution Board Interconnection Diagram
25
Interface Connections
26
Figure 2-2. Distribution Board High Level Interconnection Diagram
26
Motor Controller Board
27
Power
27
Interface Connections
28
Figure 2-3. Distribution Board/Motor Controller Board Interconnection Diagram
28
Tz Drive Board
29
Service Switches
29
Power
30
Interface Connections
30
Figure 2-4. Distribution Board/Tz Drive Board Interconnection Diagram
31
Control Panel Controller Board
33
Power
33
Interface Connections
34
Figure 2-5. Control Panel Controller Interconnection Diagram
34
C-Arm Interface Board
37
Continuity Daisy Chain
37
Power
37
Interface Connections
38
Figure 2-6. Distribution Board/C-Arm Interface Board Interconnection Diagram
38
X-Ray Controller Assembly
40
Interface
40
Figure 2-7. C-Arm Interface Board High Level Interconnection Diagram
40
Figure 2-8. C-Arm Interface Board/X-Ray Controller Assembly Interconnection Diagram
41
X-Ray Controller Assembly Boards
42
I/O and Logic Board
42
Low Voltage Power Supply
42
Power Factor Regulator (PFR) Substitution Board
43
Duty Cycle Regulator
43
H-Bridge Board
43
Interface Connections
43
Figure 2-9. X-Ray Controller Assembly High-Level Interconnection Diagram
43
Figure 2-10. Low Voltage Power Supply Board Interconnections
44
Figure 2-11. PFR Substitution Board/I/O and Logic Board Interconnection Diagram
46
Figure 2-12. I/O and Logic Board/H-Bridge Board Interconnection Diagram
46
Figure 2-13. I/O and Logic Board/Duty Cycle Driver Board Interconnection Diagram
47
Figure 2-14. H-Bridge Board/Duty Cycle Driver Board Interconnection Diagram
47
X-Ray Source Unit
48
Data Acquisition System
48
Solid State Detector
49
Power
49
Interface Connections
49
Integrator/Multiplexor Board
50
Power
51
Interface Connections
51
Figure 2-16. Analog Digital Converter Board/Integrator Multiplexor Board Interconnection Diagram
51
Analog to Digital Board
52
Power
53
Interface Connections
53
Power Module
54
Figure 2-18. Power Module Block Diagram
55
Section 3 Installation
57
Required Tools
57
Required Documentation
57
Room and Doorway Size
58
Figure 3-1. Room Layout (4500A)
58
Figure 3-2. System Dimensions (4500SL)
59
Figure 3-3. System Dimensions (4500W)
59
Arrange for Help
60
Inspect for Visible Shipping Damage
60
Figure 3-4. System Dimensions (4500C)
60
Uncrate Unit
61
Figure 3-5. Crated Unit (QDR 4500A and QDR 4500SL)
61
Inspect for Hidden Shipping Damage
62
Take Inventory
62
Measure Path to Final Destination
62
Short Doorway
62
Narrow Hallway
63
Remove Table Top (if Necessary)
63
Figure 3-6. Uncrated Unit (QDR 4500A and QDR 4500 SL)
63
Remove Qdr 4500A, or Sl, C-Arm (if Necessary)
64
Figure 3-7. Table X Drive
64
Figure 3-8. Tipping Unit
65
PREPARING the TABLE TOP for MOVING (SL Only)
66
Move Unit to Destination (Vertical Position)
66
Move Unit to Destination (Horizontal Position)
67
Figure 3-9. Moving and Tilting the Unit down
67
Figure 3-10. Auxiliary Horizontal Caster Installation
68
Set up Unit
69
Figure 3-11. Shipping Bracket Locations (QDR 4500A and SL)
69
Figure 3-12. Shipping Bracket Locations (QDR 4500A and SL)
70
Figure 3-13. Shipping Bracket Locations (QDR 4500W and C)
70
Install Qdr 4500A, or Qdr 4500Sl, Upper C-Arm
71
Figure 3-14. Shipping Bracket Location (QDR 4500W and C)
71
Install Qdr 4500W, or Qdr 4500C, C-Arm
72
Figure 3-15. Repositioning the Belt Tensioning Mechanism
72
Install Computer
73
Install Cables
73
Figure 3-16. Isolation Transformer Taps
73
Safety Precautions
74
Check Power Line Voltage
74
Measure Line Voltage
74
Measure Isolation Transformer Secondary Voltage
74
Check Tube Kv Peak Potential
75
Check Tube Current
77
Check Belt Tension
79
Adjust C-Arm y Belt
79
Calibrate Motors
79
Check X-Ray Beam Alignment
79
Calibrate Aperture (Qdr 4500A and Sl)
79
Check Laser Positioning Offset
80
Adjust A/D Gain Control
80
Perform Beam Flattening
80
Perform Lateral Alignment Test
80
Measure X-Ray Dose to Patient
80
Check Hvps/S (Tank) for Radiation Leakage
81
Figure 3-21. Leakage Test Shield (099-0566)
81
Calibrate for Area, Bmd and Bmc
82
Test Scan Modes
82
Finish Assembling Unit
82
Measure X-Ray Scatter from Phantom
83
Perform Qc
83
Run Reproducibility Test
83
The Radiation Measurement Report
85
Section 4 Alignment and Calibration
87
Checking Table Alignment
87
Aligning Table
87
Figure 4-1. Table Alignment
88
Front to Back T-Rail and Table Edge/Rail Gap Adjustment
89
C-ARM PARALLELISM ADJUSTMENT (a and SL Only)
89
Figure 4-2. Pedestal (Covers Removed)
89
X-RAY BEAM ALIGNMENT (a and SL Only)
90
Figure 4-3. X-Ray Alignment Fixture (010-0923)
90
Figure 4-4. Inserting the X-Ray Alignment Fixture
91
Figure 4-5. the Alignment Fixture Properly Installed
92
Figure 4-6. Filter Drum Adjustments - Top View
92
Figure 4-7. Array Assembly - Top View, Partial
93
X-RAY BEAM ALIGNMENT (C and W Only)
94
APERTURE CALIBRATION (a and SL Only)
95
Motor Calibration
95
MOTOR$TZ (QDR 4500A and SL)
96
MOTOR$AY (All QDR 4500 Models)
98
MOTOR$TY (QDR 4500A and W)
102
MOTOR$TX (All QDR 4500 Models)
105
MOTOR$AR (QDR 4500A and SL)
108
Laser Positioning Offset Adjustment
113
A/D Gain Control Adjustment
113
Beam Flattening
114
X-Ray Beam Alignment "Airscan" Test
116
Machines Using Body Composition Analysis (BCA)
117
Machines Using BMD Whole Body Analysis
117
Lateral Alignment Test (Qdr 4500A and Sl)
117
Area, Bmd and Bmc Calibration
119
Scan Thickness Measurement & Calibration (QDR 4500A and SL)
119
Scan Thickness Measurement & Calibration (QDR 4500W and C)
122
Calibration of Area and BMC, for Array Scan Modes
124
Adding Array AP Scans to the QC Database
125
Section 5 Remove and Replace Procedures
131
Recommended Tools
131
Electronics Tray Frus
131
Electronics Tray Printed Circuit Boards
131
C-Arm y Belt
132
C-Arm y Motor or Gearcase
133
Figure 5-1. Electronics Tray Frus
133
C-Arm y Encoder
134
Control Panel and Table y Frus
134
Control Panel
135
Pcbs under Right-Side of the Table
135
Figure 5-2. Control Panel and Table y Frus
135
Figure 5-3. Left Side Table y Frus
137
Figure 5-4. Table X Frus
139
Pedestal
141
Figure 5-5. Table Z Frus
142
Linear Potentiometer (Encoder- Obsolete)
143
The Linear Rotary String (Encoder)
143
Installation
143
Figure 5-6. Installing the Rotary String Encoder
144
Arm R Frus
145
Motor Controller Board
145
Figure 5-7 C-Arm R Frus (Outside View)
145
Arm R Belt
146
Arm R Motor, Gearcase, Encoder or Encoder Belt
146
Figure 5-8. C-Arm R Frus (Inside View)
147
Gas Spring
148
Lower C-Arm Frus
148
C-Arm Interface Board
148
X-Ray Controller Assembly
148
Filter Drum Assembly
150
Figure 5-9. Lower C-Arm Frus
150
Tank Assembly
151
Figure 5-10. Top View of Tank
152
Upper C-Arm Frus
153
Integrator/Multiplexor Board
153
Detector Boards
154
Figure 5-11. Upper C-Arm Frus
154
Laser Assembly
155
Figure 5-12. Detector Assembly Mounting
155
Rear C-Arm Frus
156
Analog to Digital Converter Board
156
Figure 5-13. Laser Assembly
156
Power Module Frus
157
28 Volt Power Supply
157
Figure 5-14. Rear C-Arm Frus
157
Figure 5-15. Power Module Frus
158
Line Filter
159
Isolation Transformer
159
Power Controller Board
159
Operator's Console Frus
160
Figure 5-16. Power Control Panel Frus
160
Figure 5-17. Operator's Console Assemblies
161
Aperture Assembly Frus
162
Aperture Stepper Motor
162
Figure 5-18. Computer Assemblies
162
Aperture Motor PCB
163
Aperture Position Belt
163
Figure 5-19. Aperture Assembly Frus (QDR 4500A and SL)
163
Rotary Potentiometer
164
Drum Assembly Frus
164
Drum Encoder PCB
164
Drum Belts
165
Figure 5-20. Aperture Assembly Removal (QDR 4500A and SL)
165
Stepper Motor Assembly
166
Figure 5-21. Rear Drum Assembly Frus
166
Drum Bearings
167
Figure 5-22. Front Drum Assembly Frus
167
Figure 5-23. Drum Outer Bearings
168
Replacing Emi Cables
169
Figure 5-24. Drum Inner Bearings
169
Figure 5-25. the EMI Compliance Cable
170
Fru Lists
171
Cables
177
Miscellaneous
177
Mobile
178
Special Tools
178
Section 6 Fault Isolation
179
Before Starting
179
Software Configuration
179
Hardware Configuration
179
Power Problems
179
Motion Problems
180
Figure 6-1. Scanner Motion Directions
181
Control Panel Problems
183
Display Problems
183
Vertical Stripe
184
Horizontal Stripe
184
Noise
184
No Display
185
Targeting/Laser Problems
186
Data Communications Problems
186
Area /Bmd/Bmc/CV Specification Problems
187
X-Ray Problems
187
No X-Rays
187
X-Ray Alignment Problems
188
Figure 6-2. Checking C-Arm Parallelism
188
Beam Flattening Problems
189
Laser Problems
190
Oil Leakage
191
The Torque Specifications
191
Tank Top Cover Components and Screw Location
191
Figure 6-3 Tank Assembly Top View
191
Tightening the Lexan Cup Screws
192
Tightening the Bladder Gasket Screws
192
Tightening the Transformer Seal Screws
192
Figure 6-4 Lexan Cup Screw Tightening Order
192
Figure 6-5. Bladder Gasket Screws
192
Tightening the Tank Cover Gasket Screws
193
Figure 6-6. Transformer Screws
193
Miscellaneous Problems
194
Messages
194
Figure 6-7. Tank Cover Gasket
194
No A/C Line Interrupts
195
Error Message List
197
Section 7 Preventive Maintenance
227
Customer Preventive Maintenance
227
Field Service Preventive Maintenance
227
Guide Rail and Bearing Maintenance
228
Figure 7-1. Guide Bearing and Rail
229
Section 8 Pcb Summary Information
231
Power Distribution
231
Adc
231
Signal Distribution
232
Communications Controller
232
Detector Array Assembly
233
TZ Drive
233
Stepper Motor Controller
234
Control Panel Controller
234
Section 9 Software Tools
237
Susq
237
Figure 9-1. SUSQ Screen−X-Rays off
238
Figure 9-2. SUSQ Screen−X-Rays on
238
Figure 9-3. SUSQ Screen Settings
239
Sqkeypad
240
Appendix Asoftware Deinstallation/Installation
241
Appendix Bcross-Calibration
243

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Hologic QDR 4500 Technical Manual (250 pages)

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