GE Medical Systems PRODIGY, LUN7396 Service Manual

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PRODIGY

Part Number: LUN7396 Revision: C

Service Manual

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ii Prodigy Service Manual

This document contains confidential or proprietary information of GE-Lunar Corp. neither the document nor the information is to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

GE-LUNAR Corporation makes no warranty of any kind with regard to this material, and shall not be held liable for errors contained herein or for incidental or consequential damages in connection with the furnishings or use of this manual.

Read through this manual thoroughly before attempting to service any components. Unauthorized service may void system warranties or service contracts. Consult the GE-LUNAR Customer Support Department prior to attempting any servicing:

608-828--2663

608-826-7107 (Fax)

is a registered trademark of General Electric Company.

PRODIGY® is a trademark of GE-LUNAR Corporation.

Windows NT® is a trademark of Microsoft Corporation

Prodigy Service Manual iii

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iv Prodigy Service Manual

READ THIS FIRST

Using This Manual:

A person who will be performing service work on the PRODIGY should use this manual in the following manner:

Read the Safety and Overview Chapters to familiarize yourself with the scanner as a whole and with the general function of the circuit boards.

Chapter 3 should be understood completely as it explains the Diagnostics Software (built in – requires a password for access).

The Chapter 4 and Chapter 5 contain common procedures and troubleshooting information and can be read as needed, but are good sources of information.

When a problem arises, Chapter 4 should be referenced. Check the table of contents for Chapter 4 to see if the problem being experienced is described. If so, refer to the appropriate page. If not, try to generalize the problem (e.g. the Detector is repeatedly running into the front of the scanner and reversing and then running back into the front of the scanner. This is a mechanical problem in general, specifically with Transverse Mechanics, check that subsection of Chapter 4 for the subsystem experiencing the fault.

This manual commonly references other Sections and pages of the manual as needed, so often procedures in the Chapter 5 Appendix are referred to as ways to solve problems described in Chapter 4.

Information Requested By GE-LUNAR:

When requesting assistance from GE-LUNAR, please provide the following information:

System Number (DF+xxxxx)

Institution or Doctor's name

Location

Complete list of symptoms

Names and part numbers of parts needed for service

Prodigy Service Manual v

In addition to the information above, an Error Log printout and QA’s and QA history or other failing diagnostic test printout (Alignment Test etc.) will also help to improve the accuracy of our diagnosis:

For problems with specific patient scans, it is recommended that you copy the scan files to diskette, and send it, with a description of the problem, to the Applications Department at GE LUNAR.

vi Prodigy Service Manual

1 1112

Safety

Chapter 1:Safety

This chapter highlights safety devices and features a Service Engineer should know before servicing a PRODIGY system.

Chapter Contents:

1.0 General Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.1 Symbols and labels found on the PRODIGY . . . . . . . . . . . . . . . . . . 1-15

1.1.1 External Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.1.2 Internal Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.1.3 Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.2 Emergency Stop Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

1.3 Laser Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

1.4 Shutter Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

1.5 Cautions, Warnings, and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

1.5.1 Caution Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

1.5.2 Warning Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.5.3 Note Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.6 Safety Concerns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.6.1 Pinch points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.6.2 Laser safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

1.6.3 Radiation safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

1.6.4 Scatter Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

1.7 Controlling Computer and Accessories . . . . . . . . . . . . . . . . . . . . . . 1-26

1.7.1 Electrical Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

1.7.3 Peripheral Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

1.7.4 Standard room configuration (system no. DF+12000 and greater)126

1.7.5 Small room configuration (system no. DF+12000 and higher) 1-27

1.7.6 Scanner power output configuration (system no. DF+11999 and

lower) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

1.7.7 Wall outlet configuration (system no. DF+11999 and lower) . . 1-27

Figure 1-1. The PRODIGY Display Panel . . . . . . . . . . . . . . . . . . . . . . . 1-19

Figure 1-2. Laser Warning Label (U.S. systems only) . . . . . . . . . . . . . . 1-20

Figure 1-4. Laser Warning Label (International systems only) . . . . . . . . 1-20

Figure 1-5. Source (x-rays) off - Shutter closed (green) . . . . . . . . . . . . . 1-21

PRODIGY Service Manual (Rev C - 2000) Safety113

Figure 1-6. Source (x-rays) on - Shutter open (yellow) . . . . . . . . . . . . . . 1-21

Figure 1-7. Potential Pinch Points on the PRODIGY . . . . . . . . . . . . . . . 1-23

Figure 1-8. PRODIGY Iso-Dose Diagram . . . . . . . . . . . . . . . . . . . . . . . . 1-25

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-14 Safety PRODIGY Service Manual (Rev C - 2000)

1.0 General Safety

• DO NOT attempt to service the PRODIGY without first reading this manual.

• DO NOT attempt any repairs without prior instructions from authorized LUNAR personnel.

• In order to maintain electrical safety and electromagnetic compatibility, the Lunar PRODIGY is only to be connected to a computer, printer, and peripherals that are certified to be compliant with IEC 950/EN 60950 Safety of information technology equipment, including electrical business equipment and IEC 601-1-2 Medical electrical equipment, Part 1: General requirements for safety, 2. Collateral Standard: Electromagnetic compatibility - Requirements and tests.Emergency Stop Button

1.1 Symbols and labels found on the PRODIGY

1.1.1 External Symbols

• The following symbols are found on the PRODIGY, in the Operators manual, and in the Service Manual.

Attention: contains important safety information such as the location of a pinch point.

Emergency Stop Button: shows the location of the emergency stop button.

Power On: shows the location of the Power On indicator and the switch position for Power On.

Power Off: shows the switch position for Power Off.

Laser On: shows the location of the Laser On indicator. It is found

only on systems delivered internationally.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Safety1-15

Shutter Open: shows the location of the Shutter Open indicator.

X-ray On: shows the location of the X-Ray On indicator.

Type B Equipment: shows that the scanner has Type B

protection against electrical shock.

1.1.2 Internal Symbols

• The following symbols are found inside the PRODIGY, and in the Service Manual.

Protective Earth: shows the location of a Protective Earth Terminal.

Functional Earth: shows the location of a Functional Earth Terminal.

1.1.3 Labels

• The following labels are found on the PRODIGY Scanner.

Laser Caution Label: Shows that the scanner uses a Class II laser. This label is not found on systems shipped to Canada.

Laser Caution Label: Canada only

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-16 Safety PRODIGY Service Manual (Rev C - 2000)

Tube Head Assembly Label (system number DF+12000 and greater): This label gives tube head

assembly and x-ray source characteristics information. It is located on the tube head assembly and the foot panel of the scanner.

Tube Head Assembly Label (system number DF+11999 and lower): This label gives tube head

assembly and x-ray source characteristics information. It is located on the tube head assembly and the foot panel of the scanner.

A definition of each symbol on this label follows:

Inherent Filtration

Tube Insert

X-ray Source

Focal Point

System Label (system number DF+12000 and greater): This label gives system input power

requirements and compliance information. It is located on the foot panel of scanners. The CE mark shows compliance with UL/CSA and the Medical Device Directive 93/42/EEC.

System Label (system number DF+11999 and lower): This label gives system input power

requirements and compliance information. It is located on the foot panel of scanners. The CE mark shows compliance with UL/CSA and the Medical Device Directive 93/42/EEC.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Safety1-17

High Voltage Power Supply: This label gives high voltage power supply (x-ray generator) information. It is located on the positive and negative power supplies, and foot panel of the scanner.

X-ray Controller: This label shows x-ray controller compliance. It is located on the foot panel of the scanner.

Collimator Assembly: This label gives collimator assembly information. It is located on the collimator and foot panel of the scanner.

Warning Label and Radiation Symbol: The Warning label shows that the system uses ionizing radiation. It is found only on systems delivered in the United States. Always obey instructions for safe operation.

Radiation Label: This label shows that the system uses ionizing radiation.

Grounding Reliability Label: This label states that grounding reliability can only be maintained when using a “Hospital Grade” or “Hospital Only” receptacle. It is only found on systems delivered in the United States.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-18 Safety PRODIGY Service Manual (Rev C - 2000)

1.2 Emergency Stop Button

• The Emergency Stop Button is a round red button located on the scanner display panel (see Figure 1-1). When pressed, power is removed from the X-ray tube head, the laser, and the shutter is closed. Power is also removed from the scan arm motors, allowing the operator/patient to push the scan arm out of the way.

Figure 1-1. The PRODIGY Display Panel

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Safety1-19

1.3 Laser Exposure

• The PRODIGY is equipped with a Class II Laser device. This laser is used for patient positioning. A Class II rating indicates a low power visible laser that is not normally hazardous to eyesight but has the potential to be hazardous if viewed directly for an extended period of time. Because of this potential hazard, DO NOT stare directly into the beam while the laser is in operation, and DO NOT allow the beam to shine directly into the patients' eyes. No specific eye protection is required with a Class II laser.

• A amber laser-on indicator, located on the front of the scan arm, is lit when the laser is on. The program activates the laser during positioning for an image acquisition. The program then turns off the laser when you begin the scan. The emergency stop button will turn off the laser.

• There is a caution label (Figure 1.2) on the scan arm near the Display Panel.

Figure 1-2. Laser Warning Label (U.S. systems only)

Figure 1-3. Laser Warning Label (Canadian Systems only)

Figure 1-4. Laser Warning Label (International systems only)

Note: DO NOT STARE INTO THE BEAM while the laser is

operating.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-20 Safety PRODIGY Service Manual (Rev C - 2000)

1.4 Shutter Indicator

• This symbol is used to indicate an open-shutter condition in accordance with the safety standards established by the International Electrotechnical Commission (IEC).

Figure 1-5. Source (x-rays) off - Shutter closed (green)

Figure 1-6. Source (x-rays) on - Shutter open (yellow)

• This symbol appears near the yellow X-ray shutter-open indicator light. The X-ray shutter-open indicator light is located on the Display Panel on the scan arm near the front.

Note: When the x-ray on / shutter open symbol appears in literature

associated with the PRODIGY scanner, it will be used to indicate that the procedure being described results in an openshutter condition. During these times personnel should exercise caution to avoid excessive exposure to the X-rays.

1.5 Cautions, Warnings, and Notes

• This manual contains warning and caution statements wherever appropriate for your safety. The warnings and cautions used throughout the manual are based on the safety standards established by the International Electrotechnical Commission (IEC). In addition, the manual uses notes to attract the reader's attention to important information.

1.5.1 Caution Statements

A caution statement reflects a condition that, if not avoided, could cause equipment or property damage.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Safety1-21

1.5.2 Warning Statements

1.5.3 Note Statements

Note: This symbol turns the reader's attention to important

information which may otherwise be overlooked.

1.6 Safety Concerns

1.6.1 Pinch points

The Warning label below identifies the location of possible pinch points

A warning statement reflects a potentially hazardous condition that, if not avoided, could result in serious injury.

Because the PRODIGY Densitometer contains moving parts, there are places on the scanner where there is a danger of pinching. Operators should be aware

of these pinch points to avoid injury to the patient or themselves. When the scanner arm is in motion, make sure possible pinch point locations are clear at all times. Labels applied at the LUNAR factory indicate the location of the pinch points. The pinch points and their labels are shown in the figure 1-7.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-22 Safety PRODIGY Service Manual (Rev C - 2000)

Figure 1-7. Potential Pinch Points on the PRODIGY

1.6.2 Laser safety

Do not touch the AC Surge Suppressor (located on the AC terminal block) it may be hot.

Do not electrically connect the isolation transformer bolt head to ground, doing this will short out the transformer

Scan table isolated outlet strip must be appropriately connected.

DO NOT STARE INTO THE LASER BEAM during patient positioning and Quality Assurance procedures.

The label that follows is located on the scanner arm and shows the location of the laser aperture.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Safety1-23

1.6.3 Radiation safety

X-ray exposure: The system makes radiation when electric voltage is

supplied to, and current flows through, the x-ray tube. During a measurement, the shutter opens to let a beam of radiation pass through the scanner table and patient. The radiation field at the table top is 19.2 mm x 3.3 mm. Lead oxide shielding surrounds the x-ray tube insert inside the tube housing assembly and reduces radiation levels around the scanner table.

Skin entrance dose: Table 1 of the PRODIGY Operators Safety and Specifications manual shows irradiation times and skin entrance doses.

1.6.4 Scatter Radiation

• There is some scatter radiation from the PRODIGY when it is running. Figure 1-8 shows the radiation dosages while the scanner is running at

3.00 mA at certain distances.

• These dosages are relatively insignificant as the allowed yearly dosage for a person working with radiation emitting equipment is 5000 mRem. Radiation however should be avoided when possible.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-24 Safety PRODIGY Service Manual (Rev C - 2000)

Figure 1-8. PRODIGY Iso-Dose Diagram

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Safety1-25

1.7 Controlling Computer and Accessories

1.7.1 Electrical Safety

IEC and UL/CSA certification

IEC: To maintain electrical safety, all computer equipment and accessories

connected to the scanner must meet all IEC requirements for safety, such as IEC 950, "Safety of information technology equipment, including electrical business equipment," and IEC 801-5, "EMC Surge Immunity Requirements." The computer and all accessories must have the CE label.

UL/CSA: To maintain electrical safety, all computer equipment and accessories connected to the scanner must have safety agency approvals for UL/CSA.

1.7.2 Electromagnetic interference

Although the scanner meets safety standards regarding electromagnetic interference (EN60601-1-2), you may still experience a loss of performance under extreme electromagnetic conditions. Maximize the distance between the scanner and other equipment, and use a dedicated power line, to avoid interference to and from the scanner.

1.7.3 Peripheral Configurations

The correct connection of the computer and all peripherals is necessary to maintain electrical safety. The signal cable of the scanner is intended only for connection to an approved computer. Call LUNAR Support or your LUNAR

distributor before adding peripherals.

Note: The scanner's output power strip can be used to supply the

Host PC with isolated power. If it is to be used the following conditions must be met. If the conditions cannot be met, the scanner's output power strip cannot be used.

Note: See also Peripheral Block Diagrams - Section 2.2.3

1.7.4 Standard room configuration (system no. DF+12000 and greater)

The computer, peripherals, and all other equipment must be located more than 1.83 m from the scanner. Use an outlet strip to power the computer and all peripherals. The outlet strip must be mounted off the floor so that it does not touch other equipment. If your outlet strip was provided by LUNAR, it has a maximum output of 15A, 120VAC. Only system-related equipment should be powered by the outlet strip.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-26 Safety PRODIGY Service Manual (Rev C - 2000)

A modem and/or network connection can be made at any time if you are using the standard room configuration.

1.7.5 Small room configuration (system no. DF+12000 and higher)

You must power the computer, peripherals, and all other equipment with an isolating transformer if the room is too small to maintain at least 1.83 m of separation between the scanner and all other equipment.

The isolation transformer supplied by LUNAR has a maximum output of 400/ 500VA. Only system-related equipment should be powered by the isolation transformer. Failure to use an isolation transformer can cause leakage currents in excess of 100 microamperes.

A modem and/or network connection can only be made in the small room configuration if all exposed metal surfaces of the computer and peripherals are out of the patient environment.

1.7.6 Scanner power output configuration (system no. DF+11999 and lower)

LUNAR recommends that you use scanner power output to provide isolated power to the computer and all peripherals. The power strip must be mounted off the floor such that it does not touch other equipment. The computer and ALL peripherals must be powered by the scanner. All other equipment must not be powered by the scanner and must be located more than 1.83 m from the scanner. Failure to use scanner power output can cause leakage currents in excess of 100 microamperes.

If a network and/or modem connection is needed, refer to the wall outlet configuration.

1.7.7 Wall outlet configuration (system no. DF+11999 and lower)

As an option to scanner power output, a wall outlet can be used to power the computer and peripherals. Isolated power from the scanner must not be used to power any equipment if a wall outlet is used. All exposed metal surfaces of the computer, peripherals, and other equipment must be located more than

1.83 m from the scanner.

A network and/or modem connection can be made to the computer if power is supplied from a wall outlet as described above.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Safety1-27

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

1-28 Safety PRODIGY Service Manual (Rev C - 2000)

2 1112

System Overview

Chapter 1:System Overview

This chapter provides an overview of the PRODIGY system.

• In addition the chapter contains a brief discussion of major subsystems and illustrations of the PRODIGY power system.

• This Chapter contains the PRODIGY Block Diagrams

2.0 PRODIGY System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

2.0.1 PRODIGY Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

2.1 Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

2.1.1 Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

2.1.2 Electronics Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

2.1.3 Scan Arm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

2.1.4 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

2.2 PRODIGY Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38

2.2.1 PRODIGY I (System numbers DF+11999 and lower) Power

Distribution Block Diagram (AC entrance) . . . . . . . . . . . . . . . . . 1-38

2.2.2 PRODIGY System Block Diagram PRODIGY I System Block

Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39

2.2.3 PRODIGY I Peripheral Configuration Block Diagrams . . . 1-40

2.2.4 PRODIGY II System / Power Block Diagram . . . . . . . . . . 1-41

2.3 PRODIGY Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42

2.4 PRODIGY I (system numbers DF+11999 and lower) Single Board

Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43

2.4.1 SBC Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43

2.4.2 SBC Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43

2.4.3 SBC / Host PC Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 1-44

2.5 PRODIGY II Combined Single Board Controller (cSBC) (systems

DF+12000 and greater) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-45

2.5.1 cSBC System Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-45

2.5.2 cSBC Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-46

2.5.3 TRANS / LONG MOTOR Control and Status . . . . . . . . . . . . . 1-50

2.5.4 AGS ROLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51

2.5.5 AGS DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51

2.5.6 SCANNER RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-52

2.5.7 GE-LUNAR Model 7861 X-ray Generator Errors. . . . . . . . . . . 1-53

2.5.8 DC FAIL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54

PRODIGY Service Manual (Rev C - 2000) System Overview229

2.5.9 DCA / AGS / BIAS DAC's . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-54

2.5.10 KV/mA DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-55

2.5.11 ARC/FIL DAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-55

2.5.12 PEAK DAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-55

2.5.13 MAX PLD Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-55

2.5.14 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56

2.5.15 MASTER RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-56

2.5.16 SUICIDE RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-57

2.5.17 MISC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-57

2.5.18 MISC IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-57

2.5.19 Stepper Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58

2.5.20 OMI Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-59

2.5.21 Patient Positioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-59

2.5.22 Limit Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-59

2.5.23 X-ray Source Control / Mechanical Interlocks . . . . . . . . . . . . 1-59

2.5.24 Shutter / Collimator Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-60

2.5.25 End of Exposure Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-60

2.5.26 Panel LED's . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-60

2.5.27 HVPS Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-60

2.5.28 ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61

2.5.29 mA Low Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61

2.5.30 Detector Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61

2.5.31 Communications Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62

2.5.32 Debug RS-232 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62

2.5.33 Diagnostic LED's . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-62

2.6 Power Distribution (PRODIGY II Systems DF+1200 and greater) . . 1-64

2.7 Tube Head and X-ray Insert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65

2.7.1 X-ray generation and Spectrum. . . . . . . . . . . . . . . . . . . . . 1-65

2.8 X-ray Generator (High Voltage Power Supply(ies)) . . . . . . . . . . . . . 1-66

2.9 MAX Board (PRODIGY I systems DF+11999 and lower only) . . . . . 1-67

2.9.1 MAX Board Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-67

2.9.2 Dedicated +28VDC power supply . . . . . . . . . . . . . . . . . . . 1-67

2.10 XORB Board (PRODIGY I Systems DF+11999 and lower only). . .1-68

2.11 Detector Sub System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69

2.11.1 Detector Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69

2.11.2 Detector Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69

2.11.3 Detector Daughter Board Overview . . . . . . . . . . . . . . . . . 1-70

2.11.4 Detector Daughter Board Operation . . . . . . . . . . . . . . . . 1-71

2.11.5 Detector Mother Board Overview. . . . . . . . . . . . . . . . . . . 1-72

2.11.6 Detector Mother Board Operation . . . . . . . . . . . . . . . . . . 1-72

2.12 FOINK (PRODIGY I Systems DF+11999 and lower only) . . . . . . . 1-74

2.12.1 FOINK Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74

2.12.2 Motion Control and Detection . . . . . . . . . . . . . . . . . . . . . 1-74

2.13 Display Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75

2.14 Audible X-RAY OFF Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-77

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-30 System Overview PRODIGY Service Manual (Rev C - 2000)

2.15 X-Ray Collimator Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-78

2.16 PRODIGY Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-79

2.16.1 Component specifications . . . . . . . . . . . . . . . . . . . . . . . . 1-79

2.16.2 Functional specifications . . . . . . . . . . . . . . . . . . . . . . . . . 1-79

2.16.3 Maximum scan area (long x transverse) . . . . . . . . . . . . . 1-79

2.16.4 Programs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-80

2.16.5 Environmental specifications . . . . . . . . . . . . . . . . . . . . . . 1-80

2.16.6 Storage and transport environment. . . . . . . . . . . . . . . . . 1-81

2.16.7 X-ray generator (system no. DF+12000 and higher). . . . 1-81

2.16.8 X-ray generator (system no. DF+11999 and lower) . . . . 1-83

2.16.9 GE-LUNAR 8022 x-ray tube . . . . . . . . . . . . . . . . . . . . . . 1-85

2.16.10 GE-LUNAR 8743 x-ray tube head assembly (system no.

DF+12000 and higher) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-86

2.16.11 LUNAR 6838 x-ray tube head assembly (system no.

DF+11999 and lower) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-87

2.16.12 Laser specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-88

2.16.13 Compatible components . . . . . . . . . . . . . . . . . . . . . . . . 1-89

2.16.14 FDA Certified Components (USA Only) . . . . . . . . . . . . 1-89

2.17 Secondary Calibration / Daily QA . . . . . . . . . . . . . . . . . . . . . . . . . . 1-91

2.17.1 Secondary Calibration overview . . . . . . . . . . . . . . . . . . . 1-91

2.17.2 Starting the Daily QA (secondary calibration) . . . . . . . . . 1-91

Peak Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-92

2.17.3 Tests Performed in the Secondary Calibration . . . . . . . . 1-92

2.17.4 QA Database. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-94

Figure 2-9. PRODIGY System Exploded View of External Covers and

associated hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

Figure 2-10. PRODIGY I NTC thermistor on the Primary Terminal Block1-35

Figure 2-11. PRODIGY I Power Distribution Block Diagram . . . . . . . . . 1-38

Figure 2-12. PRODIGY I (systems DF+11999 and lower) Block Diagram1-39 Figure 2-13. PRODIGY I (Systems DF+11999 and lower) Peripheral

Configuration Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-40

Figure 2-14. PRODIGY II System / Power Block Diagram . . . . . . . . . . . 1-41

Figure 2-15. Detector Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69

Figure 2-16. Detector Daughter Board Operation . . . . . . . . . . . . . . . . . 1-71

Figure 2-17. PRODIGY Detector Module . . . . . . . . . . . . . . . . . . . . . . . . 1-73

Figure 2-18. PRODIGY display panel. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-75

Figure 2-19. Reference axis and target angles for tube head assembly 1-85

Figure 2-20. Anode heating/cooling curves . . . . . . . . . . . . . . . . . . . . . . 1-86

Figure 2-21. Cathode emission characteristics . . . . . . . . . . . . . . . . . . . 1-88

Figure 2-22. X-ray tube assembly heating/cooling curves . . . . . . . . . . . 1-88

Figure 2-23. PRODIGY Daily QA printout with expected values . . . . . . 1-95

Table 2-1. PRODIGY I (Systems DF+11999 and lower) Fuses . . . . . . . 1-42

Table 2-2. PRODIGY II (systems DF+12000 and greater) Fuses. . . . . . 1-42

Table 2-3. PRODIGY Component Specifications . . . . . . . . . . . . . . . . . . 1-79

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-31

Table 2-4. X-ray generator technical information. . . . . . . . . . . . . . . . . . . 1-81

Table 2-5. Table 4. X-ray generator technical information. . . . . . . . . . . . 1-83

Table 2-6. LUNAR 8022 X-ray tube technical information. . . . . . . . . . . . 1-85

Table 2-7. LUNAR 8743 x-ray tube assembly technical information. . . . 1-86

Table 2-8. LUNAR 6838 x-ray tube assembly technical information. . . . 1-87

Table 2-9. Laser specifications.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-88

Table 2-10. FDA certified components (system no. DF+12000 and higher).189

Table 2-11. FDA certified components (system no. DF+11999 and lower).1-90

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-32 System Overview PRODIGY Service Manual (Rev C - 2000)

2.0 PRODIGY System

The PRODIGY includes the patient table and frame, X-ray tube, X-ray generator, detector, and arm. Its physical specifications are summarized in section 2.15.

The PRODIGY has a mechanical design with two separate motion systems that are capable of simultaneous operation. These are transverse, and longitudinal. Both motion systems are driven by stepper motors.

2.0.1 PRODIGY Electronics

The internal components of the scanner are safely secured by a number of panels, including the scanner's tabletop.

Figure 2-9. PRODIGY System Exploded View of External Covers and

associated hardware

• The front and side panels are secured by screws from the inside.

• The rear panel is secured by screws from the outside.

• The table top is screwed down from the top.

Note: Primary Service access to the electronics of the scanner is

through the table top.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-33

• The Detector electronics (in the scan arm) are secured by an upper and lower shroud, held in place by screws.

• Each metal panel is grounded to the electronics pan.

It is not usually necessary to remove the front and back panels for most service needs. However, if access is needed to the Front and Rear Longitudinal Carriages, these can be removed.

The back panel is secured by hex socket head-head screws and must be slid out of the way, for it is between the Arm Column and the frame.

If access is needed to the detector, Transverse Limit Switches or the other components mounted above in the arm, the covers of the arm must be removed.

• The upper scan arm shroud can be removed by loosening the two screws holding it in place (on the back of the arm column) and tipping it forward.

• The lower cover is held in place by four screws, two in the front and two in the back, be sure to remove the ground wire for the metal portion of the lower cover as well

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-34 System Overview PRODIGY Service Manual (Rev C - 2000)

2.1 Electronics

2.1.1 Cautions

PRODIGY I electronics use Negative Temperature Coefficient (NTC) thermistors to limit the in rush current of the AC isolation transformer and the Detector Mother Board. These devices have a high resistance when cold and decrease in resistance when warm.

PRODIGY electronics are static sensitive, take static control precautions before servicing scanner circuitry.

Figure 2-10. PRODIGY I NTC thermistor on the Primary Terminal Block

• A cool down period of 30 seconds is required before power is turned on on the system.

PRODIGY I ONLY: Failure to allow the system to “cool down” may cause the circuit breaker for the AC line to trip and / or the + 12VDC for the Detector Mother Board (DMB) will not come up to +12 VDC.

Note: The error log entry "DMB Power Cycle observed" is an

indicator that the DC power to the Detector Mother Board has been interrupted and the system should be powered down for 30 seconds to restore power to the Detector Mother Board.

PRODIGY I ONLY: The NTC’s can get hot - they are located on the AC terminal block and on the DC terminal block be careful when servicing these areas of the scanner.

2.1.2 Electronics Pan

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-35

The electronic components of the PRODIGY are mounted on the grounded Electronics Pan which is horizontally fastened inside the frame.

Note: Appendix 2 A contains a layout drawing of the Electronics Pan

for PRODIGY I and PRODIGY II systems.

PRODIGY I Systems (System numbers DF+11999 and lower):

• There are four low-voltage linear DC power supplies (under 30VDC), and two high-voltage DC power supplies (to supply 76kV to the x-ray tube) on the pan.

• In addition to the power supplies, the electronics mounting chassis holds four printed circuit boards, a stepper motor controller, the audible alarm, an AC entrance/line filter/fuse holder, an isolation transformer and a terminal strip for AC power distribution to the Host PC and peripherals.

PRODIGY II Systems (System numbers DF+12000 and greater):

• There is one low-voltage DC switching power supply (under 30VDC), and one high-voltage DC power supply (x-ray generator - supplies 76kV to the x-ray tube) on the pan.

• In addition to the power supplies, the electronics mounting chassis holds one printed circuit board, a stepper motor controller, and an AC entrance/ line filter/fuse holder.

2.1.3 Scan Arm

• The scan arm contains one high-voltage power supply (1000VDC / +12 VDC input) is located in the upper arm near the X-ray detector and provides power to the Detector Array.

• The scan arm also houses the detector and 5 associated printed circuit boards, and a stepper motor contoller.

2.1.4 Power specifications

Leakage current

• Total System with Isolation Transformer: <100 microamperes.

• Scanner Table alone: <100 microamperes.

Scanner input power

• PRODIGY I ONLY: The scanner has 12 different nominal inputs: 100, 110, 115, 120, 125, 127, 200, 220, 230, 240, 250, and 254 VAC. During installation, the scanner is configured for the nominal input which best matches the voltage on site.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-36 System Overview PRODIGY Service Manual (Rev C - 2000)

• PRODIGY II ONLY: The scanner can accept any AC input between 100 and 254 VAC.

• Voltage may fluctuate ±10% from the nominal value without a loss of scanner performance.

• The nominal input (range of inputs) can be found on the system label.

• The rated power input is 1500 VA.

• The input power must meet IEEE 519-1992 for power quality and total harmonic distortion (THD <5%).

Scanner output power (PRODIGY I system numbers DF+11999 and lower only)

• The scanner has 3 different nominal outputs: 100, 120, 240 VAC.

• The nominal voltage output of the scanner is shown on the system label.

• The computer and all peripherals which use the scanner output power must be rated for this voltage.

• The maximum power output is 400 VA.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-37

2.2 PRODIGY Block Diagrams

The block diagrams for the PRODIGY system follow:

2.2.1 PRODIGY I (System numbers DF+11999 and lower) Power Distribution Block Diagram (AC entrance)

Figure 2-11. PRODIGY I Power Distribution Block Diagram

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-38 System Overview PRODIGY Service Manual (Rev C - 2000)

2.2.2 PRODIGY System Block Diagram PRODIGY I System Block Diagram

Figure 2-12. PRODIGY I (systems DF+11999 and lower) Block Diagram

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-39

2.2.3 PRODIGY I Peripheral Configuration Block Diagrams

Figure 2-13. PRODIGY I (Systems DF+11999 and lower) Peripheral

Configuration Block Diagrams

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-40 System Overview PRODIGY Service Manual (Rev C - 2000)

2.2.4 PRODIGY II System / Power Block Diagram

Figure 2-14. PRODIGY II System / Power Block Diagram

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-41

2.3 PRODIGY Fusing

PRODIGY I (system numbers DF+11999 and lower) Fuses

Fuse Rating Type*

F1 (Computer AC) T 2.0 AL 5x20MM

F2 (Computer AC) T 2.0 AL 5x20MM

F3 (+5, +/-12 VDC

PS (1))

F4 (+5, +/-12 VDC

PS (2))

F5 (+26VDC PS) T 2.5 AL 5x20MM

F6 (+28VDC PS) T 0.63 AL 5x20MM

F7 (+5, +/-12VDC

PS (1))

F8 (+5, +/-12VDC

PS (2))

F9 (+26 VDC PS) T 2.5 AL 5x20MM

F10 (+28 VDC PS) T 0.63 AL 5x20MM

MAX PCB F1 F 0.5 AL 1/4x1 1/4 in.

All fuses are 250V, low breaking capacity (25A minimum)

Table 2-1. PRODIGY I (Systems DF+11999 and lower) Fuses

T 1.25 AL 5x20MM

PRODIGY II (systems DF+12000 and greater) Fuses

Fuse Rating Type

Condor PS

COndor PS

All fuses are 250V, low breaking capacity (25A minimum)

Table 2-2. PRODIGY II (systems DF+12000 and greater) Fuses

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-42 System Overview PRODIGY Service Manual (Rev C - 2000)

F3.15 AH 5x20 mm

2.4 PRODIGY I (system numbers DF+11999 and lower) Single Board Controller

2.4.1 SBC Functions

The microprocessor-based Single Board Controller (SBC) provides overall operation and control of the scan table.

Control Functions

• Control of x-ray source power supplies, and shutter / collimator in a fail safe manner.

• Provides control signals for two external stepper motor drives (Centent) to scan patient in a fail safe manner and senses limit switch actuation at the limits of travel (via FOINK see 2.11).

• Controls the detector array (communicates with the Detector Mother Board, section 2.10.2).

• Responds to external scanner failure signals (interrupts generated by SBC, FOINK see 2.11, and Detector Mother Board see 2.10).

Communication

• Communicates with PC host via an optically isolated RS-422 interface.

• Collects data from the detector array.

2.4.2 SBC Reset

All SBC circuitry resets when the microprocessor resets. This is done during power up, and can also be done over the communication port (via the host), through connections to other circuit boards (especially the Detector Mother Board, as a fail-safe shutdown), the by pressing the reset button on the SBC, by pressing the Emergency Stop Button on the arm, or when a fault is detected by the SBC or the FOINK (section 2.11.1).

Error Conditions Sensed by the SBC:

• Loss of Communications with the Detector Mother Board (DMB).

• Loss of Communications with the Host PC.

• Limit Switch tripped when shutter is open.

• Limit Switch depressed when commands are being sent.

• Failure in x-ray source kV programming

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-43

• Interrupt sent by FOINK

The DMB will reset the SBC if it detects an error.

Error Conditions of the DMB sensed by the SBC:

• PLD programming failure

• Loss of +5 or +12 VDC

• Loss of Communications with SBC

• Corrupt FIRMWARE

•FLASH RAM Failure

• DTR Reset button on the DMB is pressed

2.4.3 SBC / Host PC Interface

The SBC communicates with the Host PC via an RS-422 interface. This is a serial connection capable of transmitting more data than a standard RS-232 port. As it is not a standard serial port a RS-485 card must be installed into one of the Host PCs expansion slots and the port must be configured correctly for the PRODIGY to operate correctly (see DXPC2000 chapter 5 appendices).

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-44 System Overview PRODIGY Service Manual (Rev C - 2000)

2.5 PRODIGY II Combined Single Board Controller (cSBC) (systems DF+12000 and greater)

The cSBC printed wiring board (PWB) is an eight layer rectangular board measuring 7.400" x 8.100". The PWB is mounted in the via four mounting holes located 1/4" from each corner and 2 additional interior mounting holes. The components are primarily surface mount, with board connectors, headers and a few single-style ICs being the only exceptions.

Four layers were dedicated for routing layers. Sensitive signals were noted and routed manually and isolated from more powerful signals to reduce signal interference and crosstalk on the same routing layer. The main power and ground planes were stacked adjacently on the central inner layers to increase inter-planar capacitance thus reducing ground bounce and power supply noise. Traces on the top and bottom layers were kept as short as reasonably possible and tapped down to an internal trace layer through vias.

Component placement is arranged to separate analog from digital circuitry. Further isolation was achieved by segmenting the power and ground planes into analog and digital sections and denying analog/digital plane overlap, thus preventing digital noise from coupling into the analog section. All scanner control I/O is run via connectors located on the +24V plane section. The +24V plane is fully optically isolated from both the analog and digital plane areas to prevent motor noise from coupling into the analog section, to prevent DC switching noise from radiating on scanner cables, and to prevent ESD presented at cable inputs from reaching the digital IC's.

2.5.1 cSBC System Architecture

The cSBC employs an Intel 80C251 micro-controller as its processor. This processor provides 1K of on-board RAM and no on-board ROM. The controller is clocked at 16 MHz using a crystal.

cSBC Memory Space

The cSBC is designed to support a JEDEC-standard, non-volatile FLASH memory device up to 512K x 8 bits in size for code and fixed data. The board supports either 128K or 512K SRAM memory device as needed for program volatile memory. Complete address decoding is provided via the MAX PLD, the CBSC bus master, allowing the address space to be arbitrary and changed via the PLD code. The 80251 can address four 64K segments, referred to as 0x00, 0x01, 0xFE and 0xFF as per Intel literature. The firmware has the ability to map any FLASH or SRAM segment to any CPU segment via SFR’s in the MAX PLD.

FLASH RAM

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-45

At startup the CPU executes the boots code which programs the FLEX PLD and then maps in either NT or Prodigy runtime firmware as appropriate based on the most significant bit of the CCA REV register. To switch from boot code to run code the firmware jumps to SRAM and executes a code snippet which pages the boot code out of 0xFF and the desired firmware into 0xFF. The snippet then jumps from SRAM back to 0xFF to execute the firmware. A boot jumper, JP4 is provided to optionally force the CPU to remain in the boot code. When the boot jumper is installed the boot code runs the host port at

115.2KB.

SRAM

The cSBC contains a single 128K x 8 bit SRAM which provides read/write memory. The SRAM's segments are arbitrarily mapped to any CPU segment by the CPU mapping registers.

2.5.2 cSBC Functions

The microprocessor-based Single Board Controller (cSBC) provides overall operation and control of the scan table.

FLEX PLD Peripherals

The majority of scanner related programmable logic functionality is contained in the FLEX PLD, an Altera EPF6024AQC208-3 device. Device programming is handled exclusively by the CPU. On each cold boot the CPU reprograms the FLEX devices from an image stored in it's FLASH. As such a firmware download of a new FLEX image is required to permanently upgrade the PLD code.

The functional components of the programmable logic are discussed in the following subsections. Polarity of operation can be inferred from bit names and use of preceding slash for inverted logic bits.

Note that ports A-F are reloaded with default values at time of CPU reset and remain in the default state until SCANNER_RESET has been cleared and new values are written by the firmware. Defaults for port F and all other registers are invoked at power up only.

PORT A

Bit Name R/

0 trans_enable R/W 0 Transverse motor enable – low blocks trans motor pulses and

1 /trans_fwd R/W 0 Transverse motor direction control.

2 /shutter_open_ctrl R/W 1 Shutter solenoid control.

3 trans_lsw_override R/W 0 Transverse limit switch override – prevent limit switch contact

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

Def. Description

forces Centent drive to standby current level.

from blocking step pulses at hardware level.

2-46 System Overview PRODIGY Service Manual (Rev C - 2000)

4 long_enable R/W 0 Longitudinal motor enable – low blocks trans motor pulses and

forces Centent drive to standby current level.

5 /long_fwd R/W 0 Longitudinal motor direction control.

6 long_lsw_override R/W 0 Longitudinal limit switch override – prevent limit switch contact

from blocking step pulses at hardware level

7 /collimator_open_ctrl R/W 1 Collimator solenoid control.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-47

PORT B

Bit Name R/

0 /trans_front_lsw R N/A Transverse front limit switch position.

1 /trans_back_lsw R N/A Transverse back limit switch position.

2 /long_foot_lsw R N/A Longitudinal foot limit switch position.

3 /long_head_lsw R N/A Longitudinal head limit switch position.

4 trans_count_eq[0] R N/A Set when transverse step counter equals zero.

5 long_count_eq[0] R N/A Set when longitudinal step counter equals zero.

6 /shutter_open_sense R N/A Shutter limit switch position.

7 /collimator_open_sense R N/A Collimator limit switch position.

Def. Description

PORT C

Bit Name R/

/long_rev_pos

R N/A Patient positioner (joystick) input.

Def. Description

/long_fwd_pos

/trans_rev_pos

/trans_fwd_pos

/hvps_ac_relay

/motor_fail_enable

ags_enable

/motor_power

R N/A Patient positioner (joystick) input.

R/W 1 Enable AC power to X-ray HVPS.

R/W 1 Arm logic to shutdown scanner if OMI inputs not sensed.

R/W 0 Enable detector automatic gain control feedback circuit.

R/W 1 Enable 24VDC to the stepper motor drives (a.k.a. Centents).

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2-48 System Overview PRODIGY Service Manual (Rev C - 2000)

PORT D

Bit Name R/

flex_max_i/o_[0]

flex_max_i/o_[1]

flex_max_i/o_[2]

flex_max_i/o_[3]

flex_diag_3

pit_enable

flex_diag_1

/laser_on

R/W 0 Output signal to MAX PLD (diagnostic use only).

R/W 0 Firmware controlled diagnostic LED.

R/W 0 Enable Programmable Interval Timer output pulses.

R/W 1 Firmware controlled diagnostic LED.

R/W 1 Patient locator laser control.

PORT E

Bit Name R/

low_range_dac

R/W 0 Switches mA DAC from 2.048V to 0.500V reference.

Def. Description

trans_motor_accel

low_range_adc

long_motor_accel

hvps_vendor_id

iq_hvps

/hvps_enable_status

/power_up

R/W 0 Enables motor interrupt on every micro step.

R/W 0 Switches ADC from 5.000V to 0.500V reference.

R/W 0 Enables motor interrupt on every micro step.

R N/A For 7681 supply, 0 = Spellman, 1 = Bertan.

R N/A Set by resistor placement to indicate 0311/0312 supplies.

R N/A Enable status monitor from 7681 supply.

R N/A Set to indicate cold boot.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-49

PORT F

Bit Name R/

/motion_fail_enable

long_motor_fail_axis

/hvps_enable

flex_diag_2

/arm_estop_sense

spare_jmp_[1]

spare_jmp_[0]

cpu_p1_2

R/W 1 Arm scanner shutdown if OMI pulses w/o step pulses.

R/W 0 Motor fail circuitry axis control, clear for transverse.

R/W 1 Enable output to 7681 supply.

R/W 0 Firmware controlled diagnostic LED.

R N/A Emergency stop sense bit.

R N/A Unused input, resistor or jumper selectable on CCA.

R N/A Firmware controlled diagnostic LED.

PORT G

Bit Name R/

adc_mux_[0]

R/W 0 ADC analog MUX input selection control bit.

Def. Description

adc_mux_[1]

adc_mux_[2]

adc_mux_[3]

adc_mux_enable

8ms_clock

unused

R/W 0 ADC analog MUX input selection control bit.

R/W 0 ADC MUX output enable control.

R/W 0 Clock output provided to MAX PLD.

N/A N/A For expansion.

2.5.3 TRANS / LONG MOTOR Control and Status

Dual axis stepper motor control is provided entirely by the FLEX PLD. To make a typical move the firmware loads a starting velocity into the 16 bit VELOCITY register, the total number of steps for the move into the 16 bit TARGET register, and step at which to next interrupt the CPU into the 16 bit STEP register. Velocity is in terms of periods of the 2.0MHz fundamental clock per micro step pulse to the stepper drive. The drives provide 10 micro steps per full step. The firmware can track move status by reading the 16 bit READ register.

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2-50 System Overview PRODIGY Service Manual (Rev C - 2000)

As part of the setup for a move the host and/or firmware must enable the motors via the /motor_power, trans_enable, and long_enable outputs and setup the trans_lsw_override, long_lsw_override, /motion_fail_enable, / motor_fail_enable, and long_motor_fail_axis outputs as desired. If the system is in scanner reset for any reason the FLEX PLD will over-ride the / motor_power output and prevent 24V power from reaching the motor drives. Addressing for the motor control interface is provided below.

2.5.4 AGS ROLL

This is a read only 8 bit register which returns the count of AGS roll-over events since the previous read of the register. The AGS roll counter is reset on read only - it is not tied to the PIT's sample clock.

2.5.5 AGS DAC

This port provides R/W access to the AGS circuit's 8 bit U/D counter. The counter is tied via a dedicated 8 bit bus to the AGS DAC. The DAC's analog voltage is tied to the gain control input of the variable gain amplifier (VGA) used to control gain of the detector input signal. As such the firmware can read this counter to determine the current DAC voltage level and hence gain level. If ags_enable is low this port gives the firmware direct control of the AGS DAC as a parallel R/W device. If ags_enable is high, the firmware can write to the port but the DAC will continue to respond to UP/DOWN requests from the AGS DCA circuitry and hence quickly return to the AGS current operating voltage.

HE/LE COUNTERS

These read only ports provide access to the 16 bit event counters which are incremented each time the DCA circuitry detects an input pulse within the HE or LE windows (as defined by the LEL, LEH, HEL, and HEH DAC settings). These counters are read in two 8 bit bus cycles, MSB then LSB. The event counters themselves consist of a counting element and a bus element. On the rising edge on the PIT output pulse the counting elements are latched to the bus element. The PIT output is also tied to CPU external INT 1 and as such the firmware interrupt handler then has until the next rising PIT edge to read the counters before the bus elements are latched over with the next sample count and data is lost.

PIT MSB/LSB

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PRODIGY Service Manual (Rev C - 2000) System Overview 2-51

The PLD provides a programmable interval timer (PIT) to the CPU. The PLD prescales it's input clock to generate a PIT base clock of 100KHz. The CPU writes a 2 byte word to the PIT reload register MSB/LSB. The CPU then raises the pit_enable bit to start the timer. In response to the rising edge on the pit_enable, the PIT loads the reload word into it's counting element and begins counting down. When the count rolls under the PIT asserts / SAMPLE_INT, reloads the counting element, and begins another count down sequence. The /SAMPLE_INT line is tied internally to the HE and LE event counters and causes a synchronous latch of both counting elements. The / SAMPLE_INT line is also tied to the processor's 2nd external interrupt line, / INT1. The CPU interrupt handler reads the latched event counters and ships the data to the host.

2.5.6 SCANNER RESET

The scanner reset register is used to provide failsafe shutdown operation of the scanner. A falling edge on any of the inputs to this register will latch the current value of the register and drop the /SCAN_FAIL_ANY output. The MAX PLD latches the master reset register and raises CPU_RESET in response to the falling edge on /SCAN_FAIL_ANY. The MAX PLD also provides SCANNER_RESET as the logical OR of CPU_RESET and!/ SCAN_FAIL_ANY. The FLEX PLD uses it's SCANNER_RESET input as the enable bit to the tri-state buffers used to drive all safety critical output lines including shutter control, HVPS relay control, motor relay control, etc. As such the scanner is locked into a fail-safe mode whenever SCANNER_RESET is asserted.

The MAX's master reset register will remain latched until the next rising edge on the HOST_RTS input. When the cSBC is latched into reset by a scanner error it will remain in CPU reset until the host drops the RTS line and reasserts it. It will remain in scanner reset until the CPU reads the scanner reset register following the next raising edge of the RTS line at which the condition causing the /SCAN_FAIL_ANY has been cleared. The firmware passes the value of the reset registers to the host to allowing the host to display appropriate error messages to the operator. The host will be unable to perform any scanner related operations until the SCANNER_RESET has been cleared. Red diagnostic LED's (see 2.5.33) are provided for both scanner and CPU reset lines. The CPU reset line is tied to the host CTS output such that the host sees a CTS event when the cSBC enters CPU reset. The host code provides a CTS event handler which reads the reset registers and prompts the user accordingly.

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2-52 System Overview PRODIGY Service Manual (Rev C - 2000)

The firmware can also initiate a reset sequence in response to fatal error conditions by writing a 'death code' to the suicide reset register. Resets can also be initiated by the manual push button on the cSBC and by a low 5VDC power condition as sensed by the MAX705 supervisor. The scanner register is also latched at the end of read cycles such that current status can be ascertained by a double read. A bit map of the scanner reset register is provided below

Bit Name R/

thermostat_open_sense

1 /external_estop_sense R N/A Emergency stop input from external options block.

2 /dc_power_fail R N/A Loss of one or more of +5VDC,+12VDC,-12VDC, or +24VDC.

3 /long_motor_fail R N/A Motor failure detected on longitudinal axis.

4 /trans_motor_fail R N/A Motor failure detected on transverse axis.

5 /dmb_error R N/A DMB dropped it’s CTS indicating a DMB reset event.

6 /motion_fail R N/A OMI pulses detected without step pulse (manual arm motion).

7 /watchdog_reset R N/A Watchdog time-out indicates firmware crash.

R N/A Tube head thermostat over temperature.

Def. Description

2.5.7 GE-LUNAR Model 7861 X-ray Generator Errors

The HVPS error register is used to monitor the status of the 7681 X-ray source HVPS. If the register value is not equal to 0xF when /hvps_enable is low, the FLEX will raise the HVPS_ERROR_INT output to the MAX PLD. The MAX PLD latches this into the IIR register and issues an interrupt to the CPU. As such status of the HVPS is monitored when the unit is enabled. The handler for HVPS interrupt reads this register to determine the cause of the interrupt. The HVPS register is also latched at the end of read cycles such that current status can be ascertained by a double read. A bit map of the register is provided below.

Bit Name R/

0 /hvps_error_0 R N/A Error code bit from 7681 supply.

1 /hvps_error_1 R N/A Error code bit from 7681 supply.

2 /hvps_error_2 R N/A Error code bit from 7681 supply.

3 hvps_enable_status R N/A Set when /hvps_enable == /hvps_eanble_status

4 Unused N/A N/A Expansion room.

5 Unused N/A N/A Expansion room.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

Def. Description

PRODIGY Service Manual (Rev C - 2000) System Overview 2-53

6 Unused N/A N/A Expansion room.

7 Unused N/A N/A Expansion room.

2.5.8 DC FAIL

The DC fail error register latches the status of the DC power monitors at the time of reset. If scanner reset code indicates /dc_power_fail the firmware can read this register to identify the specific DC source failure. The register is also latched at the end of read cycles such that current status can be ascertained by a double read.

Bit Name R/

0 /plus_scanner_fail R N/A Loss of +24V power input.

1 /plus_analog_fail R N/A Loss of +12V power input.

2 /minus_analog_fail R N/A Loss of -12V power input.

3 Unused N/A N/A Expansion room.

4 Unused N/A N/A Expansion room.

5 Unused N/A N/A Expansion room.

6 Unused N/A N/A Expansion room.

7 Unused N/A N/A Expansion room.

Def. Description

2.5.9 DCA / AGS / BIAS DAC's

The cSBC uses a single 10 bit octal DAC, the Linear Technology LTC1660, to generate the AGS and DAC window reference voltages and the bias program voltage. The DAC utilizes a serial interface and as such is not accessed with a traditional CPU write cycle. To load the device the firmware writes to the DAC address listed above, in response to which the MAX drops the /CS line to the device. The firmware then manipulates the local serial bus clock and data lines to load the DAC setting. The desired DAC channel address in encoded into the first 4 bits of the output data word. A read is then made to the DAC address, in response to which the MAX raises the /CS line. See device data sheet and analog section below for further DAC details.

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2-54 System Overview PRODIGY Service Manual (Rev C - 2000)

2.5.10 KV/mA DAC

The cSBC uses a single 12 bit dual DAC, the Linear Technology LTC1454, to generate the HVPS kV and mA program voltages. The DAC utilizes a serial interface and as such is not accessed with a traditional CPU write cycle. To load the device the firmware writes to the DAC address listed above, in response to which the MAX drops the /CS line to the device. The firmware then manipulates the local serial bus clock and data lines to load the DAC setting. Both DAC channels must be written together, CHA (kV) first followed by CHB (mA) in a 24 bit stream packet. A read is then made to the DAC address, in response to which the MAX raises the /CS line. See device data sheet and analog section below for further DAC details.

2.5.11 ARC/FIL DAC

The cSBC uses a single 10 bit dual DAC, the Linear Technology LTC1661, to generate the HVPS filament limit and arc detect threshold voltages. The DAC utilizes a serial interface and as such is not accessed with a traditional CPU write cycle. To load the device the firmware writes to the DAC address listed above, in response to which the MAX drops the /CS line to the device. The firmware then manipulates the local serial bus clock and data lines to load the DAC setting. The desired DAC channel address in encoded into the first 4 bits of the output data word. A read is then made to the DAC address, in response to which the MAX raises the /CS line. See device data sheet and analog section below for further DAC details.

2.5.12 PEAK DAC

The cSBC uses a 12 bit DAC, the Linear Technology LTC8043, to generate the detector peak gain voltage. The DAC utilizes a serial interface and as such is not accessed with a traditional CPU write cycle. To load the device the firmware manipulates the local serial bus clock and data lines to output load the DAC setting and then performs a write/read cycle to the DAC address listed above to pulse the DAC's load line low. See device data sheet and analog section below for further DAC details.

2.5.13 MAX PLD Peripherals

The programmable logic section is based on an Altera MAX EPM7128STC100-15 device. The configuration pins for this device are taken to a JTAG style 10 pin header to allow for in-circuit programming of the device from the Altera Byte-Blaster. The MAX device is FLASH based (non-volatile) and is programmed at the time of CCA assembly. The functional components of the programmable logic are discussed in the following subsections.

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PRODIGY Service Manual (Rev C - 2000) System Overview 2-55

2.5.14 Interrupts

The CPU's interrupt capacity is effectively increased by running several interrupt signals to a register in the MAX PLD and tying the register output to the CPU external INT 0 input. The firmware interrupt handler for INT 0 then reads this register to identify the source of the interrupt and handles it accordingly. The firmware then writes a bit masked '1' back to the IIR to clear the bit of the interrupt it has serviced (the R/C in the table stands for READ/ CLEAR).

Bit Name R/

0 HOST_UART_INT R/C N/A Host UART interrupt.

1 DEBUG_UART_INT R/C N/A Debug UART interrupt.

2 DMB_UART_INT R/C N/A DMB UART interrupt.

3 HVPS_ERROR_INT R/C N/A HVPS error interrupt.

4 8mS_CLOCK R/C N/A 8ms clock tick interrupt from FLEX PLD.

5 POWER_FAIL_INT R/C N/A Power down pending in 5ms interrupt from DC supply.

6 Unused N/A N/A Expansion room.

7 Unused N/A N/A Expansion room.

Def. Description

2.5.15 MASTER RESET

The master reset register will force a CPU and scanner reset condition on the falling edge of any of its listed inputs. The contents of the register will be latched at the time of reset such that when the CPU next comes out of reset the firmware can read the register to determine what caused the preceding reset and report the appropriate code to the host. If the reset was cause by the CPU_RST_WR input, the suicide reset register contains the specific error code. If the reset was cause by the /SCAN_FAIL_ANY input, the scanner reset register contains the specific error code.

The CPU and scanner resets will remain latched until the next rising edge of the RTS input. At this time the CPU reset will be cleared if /POWER_RESET bit is not asserted and the scanner reset will be cleared if /SCAN_FAIL_ANY is high.

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2-56 System Overview PRODIGY Service Manual (Rev C - 2000)

Bit Name R/

0 /POWER_RESET R N/A MAX705 supervisor detects VCC < 4.65V.

1 /HOST_RTS R N/A RTS reset request from host via comm line.

2 /MANUAL_RESET R N/A Push button pressed.

3 Unused R N/A Expansion room, reads as ‘1’.

4 Unused R N/A Expansion room, reads as ‘1’.

5 Unused R N/A Expansion room, reads as ‘1’.

6 CPU_RST_WR R N/A Write to the suicide register, read suicide reg for error code.

7 /SCAN_FAIL_ANY R N/A Scanner reset register latched, read scanner reg for error code.

Def. Description

2.5.16 SUICIDE RESET

The CPU Reset SFR is a byte register into which the CPU can write a failure code. In response to the write the MAX PLD will store the failure code and assert the CPU_RESET line. The CPU_RESET line will be released on the next rising edge of the host RTS, at which time the CPU will be able to read the bit code from this SFR to determine the cause of the previous reset.

2.5.17 MISC OUT

The misc. output register is used to control the misc. output functions listed in the following table.

Bit Name R/

0 Unused N/A N/A Expansion room.

1 MAX DIAG_2 R/W 0 Firmware controlled diagnostic LED.

2 DMB HWPT R/W 0 Enable direct connect of host and DMB XCVR’s, bypassing

3 RESET OVERRIDE R/W 1 Enable override of CPU_RESET signal. Set to 1 on power-up such

4 Unused N/A N/A Expansion room.

5 Unused N/A N/A Expansion room.

6 Unused N/A N/A Expansion room.

7 Unused N/A N/A Expansion room.

Def. Description

UART’s, for maximized scan data bandwidth DMB to host.

that firmware can load the FLEX PLD at power-up regardless of the host RTS state.

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PRODIGY Service Manual (Rev C - 2000) System Overview 2-57

2.5.18 MISC IN

The misc. output register is used to control the misc input functions listed in the following table

Bit Name R/

0 BOOT JUMPER R N/A JP4, placed to force firmware to remain in boot code.

1 CPU_P1_2 R N/A Input from CPU port 1, pin 2 (diagnostic use only).

2 Unused N/A N/A Expansion room.

3 Unused N/A N/A Expansion room.

4 Unused N/A N/A Expansion room.

5 Unused N/A N/A Expansion room.

6 Unused N/A N/A Expansion room.

7 Unused N/A N/A Expansion room.

Def. Description

2.5.19 Stepper Motor Control

The stepper motors use the same interface design as used on IQ and Prodigy. The FET exhibits a lower voltage drop and hence provides more available power at the drives for a given source voltage - essentially recovering the voltage lost in dropping the DC supply from the 26V used on IQ/Prodigy to the 24V which is readily available in commercial switchers. Diodes are placed in series on the Centent power lines to prevent back EMF generated when the arm is moved manually from reaching the 24V planes and damaging the cSBC. A dual FET circuit is used to minimize the voltage drop on the 24V plane due to in-rush current when the motors are enabled. A circuit in the FLEX implements a 2 stage turn on when the firmware lowers /motor_enable. Q15 is enabled first to provide 24V to the Centents through R381 and R384, thus limiting the in-rush current. After the current pulse has stabilized Q14 is enabled to bypass the inrush limiting resistors. Q15 is then disabled and the motors are at full power. An PTC is provided on the source of Q15 such that the current limiting resistors will not be smoked if Q15 is inadvertently left enabled.

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2-58 System Overview PRODIGY Service Manual (Rev C - 2000)

2.5.20 OMI Input

The optical motion interrupt (OMI) sub-system connects to the transverse and longitudinal OMI CCA's. The OMI CCA's are located on the far end (the gear end farthest from the motor) of each drive axis. When the axis is in motion a small toothed wheel spins through the OMI opto's beam and pulses are sensed back on the cSBC. In this manner the system can sense a drive circuit, motor, or belt failure which might otherwise result is a concentrated exposure point during a patient scan. The OMI inputs are similar to those used on the DPX-IQ. 74LS14's are added for hysteresis which provides a clean direct interface to the PLD. As on Prodigy, logic in the FLEX PLD is used to qualify the CH A and CH B inputs into a single 'valid motion' output. Based on the phases of the square wave inputs on CH's A&B, the FLEX is able to sense a change in direction. The circuit provides hysteresis to reject false motion inputs resulting from scanner vibration when a wheel edge stops in the center of the opto beam at the end of a move.

2.5.21 Patient Positioners

Four optically isolated inputs are provided for patient positioning. These are used by the firmware to implement a joystick mode which is used in conjunction with the laser to position the X-ray beam as desired over the patient immediately prior to a scan. 74LS14 inverters are used to provide hysteresis and isolate the FLEX PLD inputs from the slow rise times of the opto output signals.

2.5.22 Limit Switches

Four optically isolated inputs are provided for limit switches. These are used by the firmware to define the transverse and longitudinal table limits. 74LS14 inverters are used to provide hysteresis and isolate the FLEX PLD inputs from the slow rise times of the opto output signals.

2.5.23 X-ray Source Control / Mechanical Interlocks

The cSBC is designed such that a high on the scanner reset net disables all scanner functionality and assures a know, fail safe, state. All scanner control outputs are driven by the FLEX PLD. The FLEX outputs drive the low side of a PS2501 opto coupler emitter. The far side of all these opto circuits are configured such that the opto has to be energized for the scanner function to be active. As such the FLEX has to sink current to energize the opto and activate the desired scanner function. Internally the FLEX code defines these outputs as tri-state buffers, each of which has their enable line tied to the scanner reset net. As such a scanner reset will force all these FLEX scanner outputs to a high impedance state, de-energizing the opto's and disabling the scanner.

The FLEX device is SRAM based and hence must be reprogrammed by the CPU at power up. When the device is not programmed all I/O pins default to the high impedance state. As such the scanner will also be in a fail safe state when the FLEX is not programmed. The CPU port 1, pin 2 also runs directly to the FLEX's ENABLE pin.

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PRODIGY Service Manual (Rev C - 2000) System Overview 2-59

The cSBC provide a failsafe mechanism independent of the programmable logic via the +5V_IO circuit. If one or more of either the E-stop, external Estop, or tube thermostat is open, the FET driving the +5V_IO net from the +5VDC plane will be disabled. The +5V_IO net provides power to the emitter anode of all opto's which drive critical scanner functions. As such the scanner will enter a failsafe state in response to these mechanical interlocks, even in the event of a PLD device failure. The +5V_IO FET will also be disabled by either a HOST_RTS or CPU_RESET.

2.5.24 Shutter / Collimator Drive

The shutter and collimator solenoid drive circuits are the same as that used on Prodigy I. The FLEX drives an isolation opto which in turn switches a pair of FET's to control solenoid current. The first FET is used for an initial 'hard hit' on open commands. It presents 24V directly to the solenoid for several hundred msec's, resulting in a large initial current pulse to the solenoid. The second FET provides the 'hold' current through a pair of current limiting power resistors. The hold FET is tied directly to the /shutter_open_ctrl bit. Note that the collimator drive is populated only for NT-A and IQ upgrades which use the old style IQ collimator assembly. The nominal values of the power resistors is changed between the NT and Prodigy II BOM's to support both the traditional linear solenoid of IQ, and the rotary solenoid of Prodigy. A jumper or DNP'd resistor is used to drive the IQ_SHUTTER line to the FLEX such that both mechanical and optical shutter limit switches are supported.

2.5.25 End of Exposure Alarm

An on-board end of exposure alarm is provided. The alarm chosen is the board mount equivalent of that used on Prodigy I.

2.5.26 Panel LED's

The 4 panel LED's, power on, X-ray on, source exposed, and laser on, are all driven PS2501-2 opto's through 750R0 / 1W current limiting resistors.

2.5.27 HVPS Control

The HVPS analog control interface is designed to provide maximum performance at minimum cost. A single, 16 channel multiplexed, 16 bit, high accuracy, ADC is used in conjunction with several lower cost, lower bit resolution DAC's. Absolute accuracy of DAC's is poor but errors are calibrated out by the firmware which monitors the actual DAC output via the ADC. In this scenario DAC integral non-linearity (INL) specs are not important, sufficient differential non-linearity (DNL) is all that is required. Serial DAC's and ADC's are chosen to conserve board space and simplify routing. Serial parts are typically also lower cost as their maximum bandwidth is limited by the serial baud rate.

The HVPS AC is enabled via a relay controlled by the cSBC. The line is primarially used to disable the HVPS by removing the AC to the HVPS via the relay. AC Power to the HVPS can be left on for up to one hour after generation of x-rays to prevent AC cycling between concurrent scans.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-60 System Overview PRODIGY Service Manual (Rev C - 2000)

A jumper and/or DNP'd resistor pad is provide to drive the IQ_HVPS line, which the firmware reads to determine which HVPS it is intended to operate. The PWB provides lemo style connector pads for use with the traditional 0311/ 0312 HVPS and MAX CCA. For the 7681 HVPS the lemos are DNP'd and a single DB-25 connector is used to control the HVPS. Tranzorb pads are provide on the PWB and are expected to be populated only if deemed necessary by EMC testing. An opto bank is also provided to support the digital interface to the 7681. See Lunar dwg 7681-SPC for details.

2.5.28 ADC

The Burr Brown ADS8320 16 bit, serial, single channel ADC was chosen for the cSBC for its high resolution, and excellent accuracy.

An Analog devices AD586 +5V voltage reference is used. The part was selected for it low noise and high accuracy

Overall the ADC and reference give the cSBC +/-5mV analog accuracy 11.2 DAC's

A single LTC1454 12 bit, serial, dual channel, DAC is used to provide the kV and mA program voltages. The part was chosen for it low cost, ready availability at national distributors, and excellent DNL specifications. The DAC is used in the x2 configuration such that the full scale output is twice the reference voltage. Voltage outputs feed back to the ADC MUX such that firmware can calibrate out DAC INL errors.

A single LTC1661 10 bit, serial, dual channel, DAC is used to provide the arc threshold and filament current limit input voltages to the new 7681 HVPS. The part was chosen for it low cost, ready availability at national distributors, and reasonable DNL specifications. Voltage outputs are not fed back to the ADC MUX as high accuracy is not required on these threshold inputs.

2.5.29 mA Low Range

To support future scan modes, an mA low range circuit is provided. The FLEX PLD provides a control bit by which the firmware can switch the mA DAC reference voltage from 2.048V to 0.5V, hence decreasing the LSB size, hence allowing the firmware to take smaller voltage steps when ramping to low uA settings. A second control bit is provided to switch the ADC from 5.0 to 0.5V reference.

2.5.30 Detector Interface

The cSBC provides a RS-422 communications post to the Detector Mother Board. The CSBC does not participate in any Detector data manipulation, all analysis and Detector control is performed at the DMB.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-61

2.5.31 Communications Ports

Host RS-422 Port

The host I/O port provides optical isolation per medical leakage requirements of EN 60601-1-1, Annex BBB, section 7. QT's 6N136 opto's are used to provide the required 115.2KB operational bandwidth and the required 2500 Vrms standoff at a reasonable price. Opto inputs and outputs are routed through the MAX PLD to support the hardware pass though mode to the DMB. A DB-9 female connector is provided on the host side of the isolation barrier. RS-232 is supported by populating the XCVR U26. RS-422 is supported by U21 and U37, the RS-422 XCVR's. A simple charge pump circuit is used to generate +5V_ISO on the host side of the barrier. Prodigy II will populate the RS-422 section and run at 115.2KB.

2.5.32 Debug RS-232 Port

The debug port is provided such that the firmware can echo status messages and other information to a dumb terminal to support debugging, development, testing, and servicing. The port is fully driven by a 16550 compatible UART is fully connected to a DB-9 header using the standard PC comm port pinout. The firmware can be configured to accept input from the debug port if required. The port is expected to be depopulated in the final production BOM to minimize cost.

2.5.33 Diagnostic LED's

16 diagnostic LED's are provided by the cSBC. Functionality is listed below

LEDColor Function Description (status indicated when lit)

D13 Green +24V +24V DC input from supply present.

D14 Green +12V +12V DC input from supply present.

D15 Green -12V -12V DC input from supply present.

D7 Green +5V +5V DC input from supply present.

D16 Red FLEX CONFIG FLEX PLD not programmed.

D20 Red CPU RESET CPU in reset mode.

D19 Red SCANNER RESET Scanner in reset (failsafe) mode.

D27 Red AGS ROLL AGS roll over or under detected.

D29 Amber FLEX DIAG 1 Diagnostic LED for misc use by firmware, control reg in FLEX.

D31 Amber FLEX DIAG 2 Diagnostic LED for misc use by firmware, control reg in FLEX.

D22 Amber MAX DIAG 2 Diagnostic LED for misc use by firmware, control reg in MAX.

D28 Amber TRANS OMI Valid transverse motion sensed by OMI circuitry.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-62 System Overview PRODIGY Service Manual (Rev C - 2000)

D22 Amber LONG OMI Valid longitudinal motion sensed by OMI circuitry.

D25 Amber HE COUNT Valid high energy photon event sensed by DCA circuitry.

D23 Amber LE COUNT Valid low energy photon event sensed by DCA circuitry.

D21 Amber HVPS ENABLE 7681 HVPS enabled.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-63

2.6 Power Distribution (PRODIGY II Systems DF+1200 and greater)

The PRODIGY II system reduces scanner cost by using a single switching DC power supply which provides +5,+/-12, and +24VDC. The supply is connected directly to the cSBC via J14. J13 is provided as a power out connector to run power to the DMB for Prodigy II. 0R0 bypass resistor are provided to allow flexibility in grounding and filtering schemes. The PWB is divided into 4 ground plane regions - DGND for +5V digital returns, AGND for +/-12V analog returns, SCNGND for +24V returns, and ISO_GND for the host I/O island. Large zeners and rectifiers are provided for over-voltage and reverse-voltage protection. Standard capacitor filter banks are provided. For EMC all cable exits other than host and DMB I/O are located over the 24V planes. The 24V plane is separated from the 5V plane via optical isolation to prevent 5V noise from reaching cables (radiated EMC) and to prevent motor noise and ESD pulses from reaching the digital and analog IC's. The 24V plane contains primarily power FET switches and power resistors used to control scanner motors, X-ray source, LED, etc. The +/-12V planes contain analog electronics used for detector and HVPS control. A +12V regulator is used to produce 12VDC for the Centent drives of off +24VDC, maintaining isolation from the +12V plane. An additional +5V regulator is used to make 5V for the OMI's of off +12V motors. 4 opto channels are used to sense the presence of the 4 DC input voltages. The opto outputs are used to drive 4 green power on indicator LED's and to allow the CPU to detect power outs.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-64 System Overview PRODIGY Service Manual (Rev C - 2000)

2.7 Tube Head and X-ray Insert

The Tube Head consists of an oil-filled metal housing which contains a fixedanode X-ray Insert (essentially a vacuum tube diode), lead-type shielding, collimating devices, a filament transformer, electrical connectors, and a Cerium (K-edge) filter.

THe X-ray generator provides a constant 76kV potential. mA control circuit regulates the fialment current via filament temperature to amintain the programmed current emission. The X-ray generator only provides mA monitor and mA limiting. PRODIGY I systems (DF+11999 and lower) have MAX CCA, PRODIGY II systems (DF+12000 and greater have mA control internal to the x-ray generator.

2.7.1 X-ray generation and Spectrum

• The X-ray Insert converts current into x-rays by accelerating the electrons across a large potential from the cathode into a tungsten target on the anode.

• The x-rays produced by the x-ray insert are filtered by the cerium filter to produce a dual energy spectrum. The x-ray spectrum has peaks at 62 and 38 kV.

• Insert potential is provided by a/the High Voltage Power Supply(ies).

• The tube current is set by the (c)SBC at 0.15 mA or 3.00 mA depending on the acquisition type.

• Tube Current is set by the (c)SBC and regulated by the MAX Board (PRODIGY I) or the Power Supply (PRODIGY II systems).

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-65

2.8 X-ray Generator (High Voltage Power Supply(ies))

The PRODIGY X-ray production system combines a constant potential x-ray generator (consisting of either one or two high voltage power supplies) and an X-ray tube. The x-rya generator provides a continuous output of 38 kV each and up to 5 mA (PRODIGY I) or 3.5 mA (PRODIGY II) to the X-ray tube. The x-ray insert anode is composed of a tungsten alloy. The specifications of the X-ray generation subsystem is outlined in section 2.16.7.

• The High Voltage Power Supply(ies) provide the anode/cathode potential to the X-ray insert.

• PRODIGY I scanners use two high-voltage power supplies (±40kVDC). During normal operation, 76kVp is applied (+38kV at the anode and 38kV at the cathode).

• PRODIGY II scanners use a single high-voltage power supply (±40kVDC). During normal operation, 76kVp is applied (+38kV at the anode and -38kV at the cathode).

• The High Voltage Power Supplies are controlled by the (c)SBC.

• These power supplies are powered by the AC line voltage and have their own built in fusing.

• The AC power is routed thru the isolation transformer (PRODIGY I Only) and the supply(ies) are enabled via a relay (see section 2.1.1).

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-66 System Overview PRODIGY Service Manual (Rev C - 2000)

2.9 MAX Board (PRODIGY I systems DF+11999 and lower only)

2.9.1 MAX Board Function

• The Tube Head and MAX Board work with the dedicated +28VDC power supply to supply tube head current.

• The current is set by the SBC (see section 2.4).

• MAX board actually regulates current to the filament transformer in the Tube Head.

2.9.2 Dedicated +28VDC power supply

• The +28 VDC dedicated power supply is switched on (for fail-safe purposes) by a solid-state relay.

• When errors are detected by the SBC, (for example, loss of arm motion) the relay will switch off and prevent production of x-rays.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-67

2.10 XORB Board (PRODIGY I Systems DF+11999 and lower only)

The XORB printed circuit board provides protection to various circuits (low voltage) from transients within the HVPS and tube head (see 2.1.1 for location).

• There may be occasional static discharges within the Tube Head. The transients caused by these static discharges (arcs) are shunted to ground through the array of transorbs present on the XORB board.

• There is no safety hazard to personnel, however, the electronics could be damaged were no protection provided.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-68 System Overview PRODIGY Service Manual (Rev C - 2000)

2.11 Detector Sub System

2.11.1 Detector Overview

• 16 individual CZT (cadmium zinc telluride) crystals which convert X-ray energy directly to electrical charge

• The charge pulse generated by the individual detectors is directly proportional to the photon energy that generated the charge pulse (see

2.16.9 for spectrum information).

• The array of 16 CZT crystals each act as pixel detectors, from which the data is combined to form the densitometry data set.

• The Detector electronics amplify, discriminate and counts x-rays for all 16 detector elements.

• The detector communicates with the SBC.

• The Detector has 5 PCB associated with it, the Detector Mother Board (DMB) and 4 identical Detector Daughter Boards (DDB’s).

• The detector has its own dedicated High Voltage Power Supply, used for supplying detector bias.

2.11.2 Detector Operation

Figure 2-15. Detector Block Diagram

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-69

The Detector is held at 450 VDC bias. When a X-ray strikes the detector an electron pair is created (small black arrows in the block diagram). This charge pair induces a small amount of current in the CZT crystal.

A charge sensitive pre-amp then converts the current to voltage and passes the signal along to the Detector Daughter Board for processing and analysis. The signal out of the pre-amp is a +5 to +10 millivolt DC signal, each event on each channel creates a small “blip”.

2.11.3 Detector Daughter Board Overview

• Each DDB processes the data from 4 of the 16 detector elements simultaneously.

• Each detector element is handled as a separate channel.

• Each DDB is responsible for:

• Pulse Shaping

• Gain Adjust

• Energy discrimination (high or low energy)

• Event counting

• Each DDB is electronically identical

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-70 System Overview PRODIGY Service Manual (Rev C - 2000)

Figure 2-16. Detector Daughter Board Operation

2.11.4 Detector Daughter Board Operation

Gain Stage / Pulse Shaping

The Detector Daughter Board takes the +5 to 10 millivolt signal, strips off the DC offset and shapes the pulse into a bi-polar pulse. This signal is further amplified to 2.4 VDC and is then fed to a bank of 4 pairs of comparators.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-71

The four fine gain control comparators are set up in two windows around the High Energy signal. If the signal falls into the lower window a signal is sent to the programmable logic (PLD). The PLD then sends an amplify signal to a DAC which in turn increases gain slightly at the pulse shaping amplifier, so that the High Energy Signal is +2.4 VDC. If the High Energy signal falls into the upper window, the fine gain is adjusted down slightly by the same mechanism at the pulse shaping amplifier, again so that the High Energy Signal is + 2.4 VDC.

The fine gain adjust is applied to the entire signal on a particular channel at the pulse shaping amplifier, therefore the Low Energy Signal’s gain is adjusted along with the High Energy Signal.

The 4 comparators of the Gain Stage are set by digital to analog converters (DAC’s) which use reference values stored in the Flash RAM of the Detector Mother Board.

Energy Discrimination and Pulse Counting

The amplified and gain adjusted pulse is simultaneously fed to a second bank of 4 comparators which are divided again into two sets of windows. The windows of the Discrimination stage are centered around the High and Low Energy pulses. These comparators are also set by DAC’s which are set by the DMB Flash RAM.

Each time a pulse falls into the High Energy window, a counter in the programmable logic (PLD) is ticked, the same happens for the Low Energy window. These two data signals are then passed to the DMB, which transmits the data to the SBC.

2.11.5 Detector Mother Board Overview

• Contains 4 slots for the DDB’s (see figure 2-9)

• Contains a slot for the Test Point Board (part of the PRODIGY tool kit see figure 2-9)

• The Detector Mother Board provides +5 V, ±12 V plus digital and analog grounds to the Detector Daughter Boards.

• The Detector Mother Board communicates with the SBC via RS-422 link.

• The patient positioning laser is controlled by the SBC via the DMB (See figure 2-9).

2.11.6 Detector Mother Board Operation

The Detector Mother Board (DMB) contains a processor and Flash RAM, which supplies programming data to the detector subsystem. The data for all comparator settings is stored here (set values), detector Bias programming data, firmware to program the PLD’s of the 4 DDB’s, the Peak value calculation operation for the detector (see section 2.17 for a discussion of the Secondary Calibration (QA)).

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-72 System Overview PRODIGY Service Manual (Rev C - 2000)

If the Flash RAM is corrupt, the DMB will read from the Firmware on the SBC. The Flash RAM can be reprogrammed from the Host / SBC.

The DMB has a processor, which is responsible for performing the Peak calculation during a Secondary Calibration (QA), programming the 4 DDB PLD’s and handles all communications with the SBC. The DMB processor sends the SBC status reports and echoes back all commands that are sent to it.

The DMB will reset the SBC if it detects an error.

Error Conditions of the DMB sensed by the SBC:

• PLD programming failure

• Loss of +5 or +12 VDC

• Loss of Communications with SBC

• Corrupt FIRMWARE

•FLASH RAM Failure

• DTR Reset button on the DMB is pressed

Figure 2-17. PRODIGY Detector Module

1 = Test Point Board, 2 = Detector Daughter Boards (4), 3 = Patient Positioning laser and

Detector Mother Board Interface, The Detector Mother Board is the horizontal circuit board

that the DMB’s and Test Point Board are plugged into.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-73

2.12 FOINK (PRODIGY I Systems DF+11999 and lower only)

2.12.1 FOINK Functions

• The FOINK Board optically isolates control circuitry (SBC) from the rest of the scanners electronics (see pan layout Appendix 2B).

• Shutter solenoid

• Scanner Motor Controllers

• Display Panel indicators and controls

• Monitors 5 different interrupts, all of which are capable of resetting the SBC (shutting down x-ray production)

• Emergency Stop Switch - open circuit - (loss of signal - failsafe)

• Tube Head Thermocouple - circuit open (loss of signal - failsafe)

• Longitudinal Motion Interrupt - source open no movement (OMI)

• Transverse Motion Interrupt - source open no movement (OMI)

• Failure of the +28 VDC Power Supply

2.12.2 Motion Control and Detection

• Motor pulses, RUN/HOLD signals and direction are generated by the SBC.

• The RUN/HOLD signals are optically isolated on the FOINK board before being sent to the Centent motor drivers. The Centents supply current to the stepper motor windings.

• Both the transverse and longitudinal drive systems have slotted disks attached which pass through optical interrupters (OMI) for motion detection. Should motion stop during patient scanning, the FOINK sends an interrupt to the SBC, which is reset and x-ray production is halted.

• Limit switches at each end of the scanner and each end of the arm signal the SBC whenever motion reaches either end or side of the scanner. If a limit switch is tripped during a patient scan, the motor associated with the tripped limit switch is halted, the SBC is reset and the shutter is closed.

• There is a dedicated DC power supply for the motion control circuitry, supplying +26VDC. The +26VDC ground is isolated from the logic ground to reduce noise (see section 2.1.1 for location)

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2-74 System Overview PRODIGY Service Manual (Rev C - 2000)

2.13 Display Panel

• The Display Panel of the PRODIGY, located on the front face of the upper arm, is the main operator interface outside the host computer.

• Four indicators display system status.

• A green Light Emitting Diode (LED) indicates a power-on condition; it lights when the +26VDC power supply comes on.

Figure 2-18. PRODIGY display panel

Power on LED is lit whenever scan table power is on.

• A yellow LED indicates if the laser is on

The laser on LED is lit when the SBC signals the DMB to turn the laser on, the LED is switched on by the DMB.

• An amber X-ray On LED indicates that x-rays are being produced (current is flowing through the X-ray Insert), though exposure is not necessarily taking place.

The X-ray on LED is lit when more than X current is flowing through the X-ray insert.

• The yellow Shutter Open LED comes on is the Shutter open and exposure possible.

The Shutter open LED is controlled by the SBC, the SBC will allow the shutter to open even if the lamp is not lit (shutter open indicator is also on the PC controller screen).

Note: It is not recommended that scanner operation be continued if

These LED's signal the operator of exposure to x-rays and must be replaced as soon as possible.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-75

• Rocker switches on the panel allow operator control of the beam position.

The Rocker switches are enabled by the SBC via the FOINK.

Note: The rocker switches are also referred to as the joystick in the

PRODIGY Service Manual and the PRODIGY Service Software.

• The Emergency stop button (red), is to be used only in emergency situations; it resets the (c)SBC and halts x-ray production.

The FOINK or cSBC detects if this normally closed circuit is opened (fail-safe operation).

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-76 System Overview PRODIGY Service Manual (Rev C - 2000)

2.14 Audible X-RAY OFF Signal

• An audible signal notifies the operator that there is a “safe” condition when the Shutter is closed.

• The FOINK or cSBC board senses the closure of the Shutter or the cessation of current through the X-ray Insert (+28VDC Power Supply or Model 7861 HVPS) and switches on the audible signal if either of these occur during an exposure.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-77

2.15 X-Ray Collimator Subsystem

• The Shutter is actuated by a rotary solenoid using +26 VDC, the voltage is reduced to a holding voltage of 12VDC after the shutter is opened.

• This solenoid is controlled by signals generated on the SBC, and optically isolated through the FOINK board on PRODIGY I systems.

• An optical interrupter (OMI) detects the shutter open condition and reports shutter position information back to the (c)SBC.

• This assembly is located on top of the X-ray Tube Head.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-78 System Overview PRODIGY Service Manual (Rev C - 2000)

2.16 PRODIGY Specifications

2.16.1 Component specifications

Table 2-3 gives specifications for standard components shipped with the PRODIGY system.

Table 2-3. PRODIGY Component Specifications

Component Specifications

Dimensions: 262.3 cm x 109.3 cm x 128.3 cm

Scanner table*

Console table 78.5 cm x 63.3 cm x 48.1 cm

Computer

Windows

Internet Explorer version 4.01 with service pack 2 Fast Serial I/O board (LUNAR part number 7151)

Weight: approximately 272.16 kg

Maximum patient weight supported: 136 kg

Greater than 266Mhz Pentium

128 MB RAM

Greater than 1GB hard disk

17” SVGA monitor (800x600x16-bit color)

LS-120 Super drive

CD ROM

Modem

NT version 4.0 operating system with service

pack 6

Printer

W x D x H—44.0 x 40.0 x 19.6 cm

*Depth is measured from the front edge of the scanner table to the back edge of the scanner arm. Height is measured from the top of the scanner arm to the bottom of the scanner arm.

*Width is measured from the front edge of the scanner table to the back edge of the scanner arm. Height is measured from the top of the scanner arm to the bottom of the scanner arm.

#Some languages may require 1024x768x16-bit color to fit the translated software text on the screen

@GE-LUNAR Recommends Diskeeper Lite (Executive Software - http:// www.execsoft.com - Glendale, California, USA)

HP DeskJet 930C

2.16.2 Functional specifications

General specifications

Focal spot to image receptor distance is 67 cm. Attenuation equivalence of patient support table is 0.7 mm Al.

2.16.3 Maximum scan area (long x transverse)

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PRODIGY Service Manual (Rev C - 2000) System Overview 2-79

• AP Spine Measurements

40.3 cm x 18 cm

• Femur Measurements

20.2 cm x 18 cm

• Dual Femur Measurements

20.2 cm x 18 cm (each femur - two scan areas)

• Total Body Measurements

197.5 cm x 60 cm measurement field

2.16.4 Programs

Note: Depending on the number of options purchased, not all of the

options listed below may be included with the PRODIGY system software:

• AP spine measurement and analysis

• Femur measurement and analysis

• Total Body measurement and analysis.

• Forearm measurement and analysis

• Lateral spine measurement and analysis

• Quality Assurance

2.16.5 Environmental specifications

Operational environment

Adhere to the specifications that follow during scanner operation:

••Ambient Space (Interior Subcomponents)–For scanner operation and servicing, do not block the area around the scanner table. Make sure there is a minimum clearance of 30.5 cm at the head and foot ends of the scanner table, at least 15.2 cm for the arm side, and 45.7 cm for the operator side.

• Ambient Space (Ventilation)–Do not block the cooling vents on the computer and scanner table. Make sure there is 15.2 cm from the console table to the wall for cable clearance and computer plugs.

• Dust, Fumes and Debris–Install the system in a clean, ventilated area. Dust and other airborne debris can cause the diskette drive heads and other sensitive mechanical components to malfunction. GE-LUNAR recommends that smoking is not permitted in the scanner room.

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2-80 System Overview PRODIGY Service Manual (Rev C - 2000)

• Humidity–Make sure the humidity for the scanner area is 20%–80%, non-condensing.

• Static Electricity–Install and operate the system in a static-free area. Adhere to minimum humidity requirements to prevent malfunctions caused by static electricity.

• Shock and Vibration–Make sure the scanner table does not receive shock greater than 1 G for more than 1 millisecond. Make sure the scanner table does not receive vibrations greater than 0.25 G at 5 Hz.

• Temperature–Make sure the temperature during system operation is 65°F–81°F (18°C–27°C).

Note: When the system is turned off, or there is a power failure,

allow the system to be on and let it warm for one hour. After one hour, complete a Quality Assurance procedure.

2.16.6 Storage and transport environment

Adhere to the specifications that follow for scanner storage and transportation:

• Humidity, 0% to 95% non-condensing.

• Atmospheric pressure, 500 to 1060 hPa.

• Temperature, -40° to 70° C.

2.16.7 X-ray generator (system no. DF+12000 and higher)

Table 2-4. X-ray generator technical information.

Classification Class I Equipment IEC 601-2-7 5.1

Degree of protection against electrical

shock

Protection against ingress of liquids

Connection to supply mains Power supply cord IEC 601-2-7 6.1g)

Mode of operation Continuous IEC 601-2-7 6.1m)

Maximum X-ray tube voltage 76 kV IEC 601-2-7 6.1m)

Maximum X-ray tube current 3 mA IEC 601-2-7 6.1m)

Rated mains voltage 100-240 VAC IEC 601-2-7 6.1j)1

Type B equipment IEC 601-2-7 5.2

Ordinary medical electrical equip-

ment

IEC 601-2-7 5.3

Number of phases in mains 1 IEC 601-2-7 6.1j)2

Mains frequency 50/60 Hertz IEC 601-2-7 6.1j)3

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PRODIGY Service Manual (Rev C - 2000) System Overview 2-81

Required over-current releases 15 Amp dedicated service IEC 601-2-7 6.1j)5

X-ray tube dissipates 243W max.

into surrounding air through forced

Heat dissipative components

air convection. Flow rate: 36 m

IEC 601-2-7 6.1t)

(approx.) Temp. rise of air stream

25° C (approx.)

Allowable high voltage supplies

Spellman SBD40PN280X2890 or

Bertan 2907.

Allowable tube head assemblies LUNAR model 8743 or equivalent

Original language of accompanying docu-

ments

Maximum continuous kV, mA at nominal

rated kV

Maximum intermittent kV, mA at nominal

rated kV

Maximum continuous kV, mA at maximum

Maximum intermittent kV, mA at maximum

Continuous kV, mA for maximum electric

output power

Intermittent kV, mA for maximum electric

output power

English IEC 601-2-7 6.8.1

76 kV, 3 mA

IEC 601-2-7 6.8.1 and 50.2.101-102

IEC 601-2-7 6.8.2

Nominal electric power 0.243 kW

0.20 mAs. Parameters: 76 kV, 0.10

Lowest current time product

mA,

2 seconds.

Nominal shortest irradiation times 2 seconds.

Method of x-ray tube voltage measure-

ment

Method of x-ray tube current measure-

ment

Voltage divider in high voltage

power

supply.

Shunt resistor in high voltage supply

return line.

Line normal to the tube port, cen-

X-ray tube assembly reference axis

tered

on tube port as shown in Figure 4.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

IEC 601-2-7 6.8.2

IEC 601-2-7

50.106.1

IEC 601-2-7

50.106.2

IEC 601-2-7

6.1j)5) 50.107.1

2-82 System Overview PRODIGY Service Manual (Rev C - 2000)

Reference loading conditions

8.21 x 10

Joules, 3 mA, 76 kV for 1

hour.

IEC 601-1-3

29.204.2

Focal spot to Image Receptor distance 67 cm

Attenuation equivalence of patient support

table.

0.7 mm Al

2.16.8 X-ray generator (system no. DF+11999 and lower)

Table 2-5. Table 4. X-ray generator technical information.

Classification Class I Equipment IEC 601-2-7 5.1

Degree of protection against electrical

shock

Protection against ingress of liquids

Ordinary medical electrical equip-

Connection to supply mains Power supply cord IEC 601-2-7 6.1g)

Mode of operation Continuous IEC 601-2-7 6.1m)

Maximum X-ray tube voltage 76 kV IEC 601-2-7 6.1m)

Type B equipment IEC 601-2-7 5.2

ment

IEC 601-1-3

29.203.2

IEC 601-1-3

29.206.2

IEC 601-2-7 5.3

Maximum X-ray tube current 5 mA IEC 601-2-7 6.1m)

Rated mains voltage

100, 110, 115, 120, 125, 127, 200,

220, 230, 240, 250, and 254 volts

IEC 601-2-7 6.1j)1

Number of phases in mains 1 IEC 601-2-7 6.1j)2

Mains frequency 50/60 Hertz IEC 601-2-7 6.1j)3

Required over-current releases 20 Amp dedicated service IEC 601-2-7 6.1j)5

X-ray tube dissipates 305W max.

into surrounding air through forced

Heat dissipative components

air convection. Flow rate: 36 m

IEC 601-2-7 6.1t)

(approx.) Temp. rise of air stream

25° C (approx.)

Spellman X2112/X2113/ rev. K and

Allowable high voltage supplies

higher. Bertan 2411P and 2411N

rev. A and

higher. LUNAR p/n 0311 and 0312.

Allowable tube head assemblies LUNAR model 6838 or equivalent

Original language of accompanying docu-

ments

English IEC 601-2-7 6.8.1

IEC 601-2-7 6.8.1 and 50.2.101-102

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-83

Maximum continuous kV, mA at nominal

rated kV

76 kV, 4 mA

IEC 601-2-7 6.8.2

Maximum intermittent kV, mA at maximum

Maximum continuous kV, mA at maximum

Maximum intermittent kV, mA at maximum

Continuous kV, mA for maximum electric

output power

Intermittent kV, mA for maximum electric

output power

76 kV, 5 mA

61 kV, 5 mA

76 kV, 5 mA

76 kV, 4 mA

76 kV, 5 mA

Nominal electric power 0.4 kW

7.89 mAs. Parameters: 76 kV, 2.63

Reference current time product

3 seconds.

Nominal shortest irradiation times 3 seconds.

No specific wait period was

Repetition rate for loading during tests

Time between tests was approxi-

20 seconds.

mA,

imposed.

mately

IEC 601-2-7 6.8.2

IEC 601-2-7

50.104.4

Method of x-ray tube voltage measure-

ment

Method of x-ray tube current measure-

ment

X-ray tube assembly reference axis

Reference loading conditions

Leakage radiation was measured at the

following loading factors.

Voltage divider in high voltage

power supply.

Shunt resistor in high voltage supply

return line.

Line normal to the tube port, cen-

tered

on tube port as shown in Figure 4.

1.09 x 10

Joules, 4 mA, 76 kV for 1

hour.

3mA, 76 kV IEC 601-1-3

IEC 601-2-7

50.106.1

IEC 601-2-7

50.106.2

IEC 601-2-7

6.1j)5) 50.107.1

IEC 601-1-3

Focal spot to Image Receptor distance 67 cm IEC 601-1-3

Attenuation equivalence of patient

support table.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

0.7 mm Al IEC 601-1-3

2-84 System Overview PRODIGY Service Manual (Rev C - 2000)

Figure 2-19. Reference axis and target angles for tube head assembly

2.16.9 GE-LUNAR 8022 x-ray tube

Table 2-6. LUNAR 8022 X-ray tube technical information.

Nominal anode input power 361 Watts IEC 613/1989

Maximum anode heat content 6000 Joules IEC 613/1989

Anode heating and cooling curves Refer to figure 5. IEC 613/1989

Anode target material Tungsten IEC 601-2-28

Reference axis Refer to figure 4. IEC 601-2-28

Target angle

78° (reference to nor-

mal)

IEC 601-2-28

Nominal focal spot values 0.5 IEC 336/1982

Maximum useful voltage 95 kVp

Maximum filament current 2.2 Amperes

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

Not Applica-

ble

Not Applica-

ble

PRODIGY Service Manual (Rev C - 2000) System Overview 2-85

Figure 2-20. Anode heating/cooling curves

2.16.10 GE-LUNAR 8743 x-ray tube head assembly (system no. DF+12000 and higher)

• Beam filtration is permanently fixed with a minimum 2.9 mm Aluminumequivalent.

Table 2-7. LUNAR 8743 x-ray tube assembly technical information.

Inherent filtration >2.9 mm Al/70 kV

Filament characteristics Refer to Figure 6.

Nominal x-ray tube voltage

Single load rating 228 W (3 mA, 76 kV) for up to 15 min.

Serial load rating

Maximum x-ray tube assembly heat con-

tent

X-ray tube assembly heating and cooling

curves

76 kV - Anode to Cathode

38 kV - Anode to Earth

38 kV - Cathode to Earth

228 W (3 mA, 76 kV) for up to 15 min.

with a

5 min. cool down time between mea-

surements.

260 Kjoules

Refer to Figure 7.

IEC 522/

1976

IEC 613/

1989

IEC 613/

1989

IEC 613/

1989

IEC 613/

1989

IEC 613/

1989

IEC 613/

1989

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-86 System Overview PRODIGY Service Manual (Rev C - 2000)

Maximum continuous heat dissipation

243 Watts (3mA x 76kV + 15W fila-

ment)

IEC 613/

1989

Maximum symmetrical radiation field

3.5 mm/19.4 mm at a distance from the focal spot of 220 mm.

Dimensions 17 cm x 19.4 cm x 11 cm

Weight 8.6 kg

2.16.11 LUNAR 6838 x-ray tube head assembly (system no. DF+11999 and lower)

• Beam filtration is permanently fixed with a minimum 2.9 mm Aluminumequivalent.

Note: Beam quality has a minimum first half-value layer of 3.2 mm of

Al at 76 kV.

Table 2-8. LUNAR 6838 x-ray tube assembly technical information.

Inherent filtration >2.9 mm Al/70 kV IEC 522/1976

Filament characteristics Refer to Figure 6. IEC 613/1989

IEC 806/

1984

IEC 601-2-

76 kV - Anode to Cathode

Nominal x-ray tube voltage

38 kV - Anode to Earth

IEC 613/1989

38 kV - Cathode to Earth

361 W (4.75 mA, 76 kV) for up to 4

Single load rating

min.,

IEC 613/1989

59 sec.

361 W (4.75 mA, 76 kV) for up to 4

Serial load rating

59 sec. with a 10 min. cool down

min.,

IEC 613/1989

time between measurements.

Maximum x-ray tube assembly heat con-

tent

X-ray tube assembly heating and cooling

curves

260 kJoules IEC 613/1989

Refer to Figure 7. IEC 613/1989

Maximum continuous heat dissipation 361 Watts IEC 613/1989

Maximum symmetrical radiation field

3.5 mm/19.4 mm at a distance from the focal spot of 220 mm.

IEC 806/1984

Dimensions 17 cm x 19.4 cm x 11 cm IEC 601-2-28

Weight 8.6 kg IEC 601-2-28

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-87

Figure 2-21. Cathode emission characteristics

Figure 2-22. X-ray tube assembly heating/cooling curves

2.16.12 Laser specifications

Table 3-9 gives the specifications for the GE-LUNAR laser.

Table 2-9. Laser specifications.

Output Power <1mW

Wavelength 635nm

Beam Diameter at

aperture

4x1mm

Aspect Ratio 4.0 to 1

Divergence 24 degrees

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-88 System Overview PRODIGY Service Manual (Rev C - 2000)

Table 2-9. Laser specifications. (continued)

Radiant Exposure 0.0001 W

Integrated Radiance 46 W

Current Draw 105 mA

Voltage Input 4-6 VDC

Safety Rating Class II

2.16.13 Compatible components

For customers located internationally, make sure the computer is certified to local requirements. The computer must meet the minimum requirements that follow:

• Greater than 266MHz Pentium

• 128 MB RAM

• Greater than 1GB Hard Disk

• 8X CD ROM

• 14” SVGA monitor with at least 800x600x16-bit color

• Windows NT version 4.0 operating system with service pack

• Internet Explorer version 4.01 with service pack 2

2.16.14 FDA Certified Components (USA Only)

Tables 2-9 and 2-10 list components certified to the FDA for use with PRODIGY scanners and is updated periodically. Contact GE-LUNAR for a current listing of compatible components.

Table 2-10. FDA certified components (system no. DF+12000 and higher).

Component Description

X-ray Controller LUNAR single board controller 7635

High Voltage Power

Supplies

Bertan

SBD40PN280X2890

Tube Head Assembly LUNAR X-Ray Tube Head Assembly 8743

Collimator

LUNAR PRODIGY Collimator Assem-

Model: 2907

Spellman

bly

Model:

LUNAR Model

7681 7681

8915

Bertan High Voltage Corp., 121 New South Road, Hicksville, NY

Spellman High Voltage Electronics Corp., 475 Wireless Boulevard, Hauppauge, NY

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-89

Table 2-11. FDA certified components (system no. DF+11999 and lower).

Component Description LUNAR Model #

X-ray Controller

High Voltage Power

Supplies

LUNAR PRODIGY single board con-

troller

Spellman

Models:

PTV40N200X2113 PTV40P200X2112

Bertan

Models:

2411 N 2411 P

5447

0311 0312

Tube Head Assembly LUNAR X-Ray Tube Head Assembly 6838

Collimator

Spellman High Voltage Electronics Corporation Hauppauge, NY

Bertan Associates, 121 New South Road, Hicksville, NY

LUNAR PRODIGY Collimator Assem-

bly

6893

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-90 System Overview PRODIGY Service Manual (Rev C - 2000)

2.17 Secondary Calibration / Daily QA

2.17.1 Secondary Calibration overview

• Daily QA (Quality Assurance) tests the integrity of the scanner so operator knows it is operating within specifications.

• Daily QA (Secondary Calibration) adjusts the calibration of the scanner to offset any changes due to the tube aging, temperature varying, or when certain components are changed.

• A third type of function, QC Phantom, is another method for testing system performance. A QC phantom is scanned using standard software and results are stored (aluminum spine in lucite).

• Daily QA ensures the system is operating properly by running 3 types of tests:

• A peak test to adjust photon counting electronics.

• A functional test that checks the indicator lights, motion system, shutter, tube output, and detector performance.

• A test that measures a secondary calibration object with different bone chambers and tissue plugs which correct for system aging and prevents long-term drifts.

• On many tests, the results must be calculated for all 16 detectors separately. The display for the test will consist of the mean value.

• All tests are run all of the time. The tests are executed and test results reported as each test completes. Test results include pass/fail and any quantitative information when appropriate.

2.17.2 Starting the Daily QA (secondary calibration)

Operator presses [F5] to start [Daily QA] which presents a plot of the last used parameter from the last Daily QA run. (Default display is the medium bone chamber.) At this point operator can interactively manipulate the data in QA database to create tables and graphs that can be printed.

Tech presses [Start] to start running Daily QA tests.

Software displays instructions to position calibration block on the table. Tech places block on tabletop silk screen and click [OK] to start.

The UI locks out all other operations except Stop button.

Scan arm moves to the "Home" position. In this case, Home is always at head of scanner for QA independent of user setting for Home.

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-91

2.17.3 Tests Performed in the Secondary Calibration

Detector Mother Board Self Test

The DACs and Flash RAM of the Detector Mother Board are tested.

Find Block

The scanner performs a scout scan to find the block. If block is not properly positioned, the scanner will prompt the user to Reposition standard more accurately.

The software automatically finds landmarks within the secondary phantom. This reduces the need for exact positioning on the table top.

Peak Test

During this test, the shutter opens with the x-rays on.

This test adjusts the sensitivity of the photon counting electronics. The test determines the optimal voltage setting for the detector amplifier so the maximum number of photons are detected. With the shutter open the software adjusts the voltage setting for the detector amplifier, acquiring counts at the different amplifier settings.

The detector peak test then determines the optimal voltage setting for the detector amplifiers based on the results. The actual peak setting is taken from the high energy count rates, the low energy channel is essentially blocked by the brass spillover piece in the QA standard.

Beam Stop test

Measures the movement of the source shutter. A functional test checks the shutter LSW and ensures the shutter stops all photons.

Motor motion and limit switches

OMI Interrupt function - the OMI signal is tested by verifying the OMI Interpol signal is present when the scan arm is stationary.

Each motor (transverse, longitudinal) will be run between hard limits and back to home position. If the hard limits do not engage, this is a failure. Also compare steps against predetermined scan window size.

If a failure occurs the number of steps taken, the expected value and the direction the arm was traveling is noted in the error log.

Spillover test

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-92 System Overview PRODIGY Service Manual (Rev C - 2000)

Measures the effect of high energy photons registering as low energy photons in the detector system. The beam passes through a brass piece that stops all low energy photons. The detector then measures the number of low energy photons detected as a measure of spillover. Spillover should be less than 13%. Spillover with the CZT detector will degrade about 0.2% per year.

Spillover Stability test

As part of the secondary calibration, the change in spillover must be

calculated on a per element basis and smoothed over the last 3 passing QA's. Daily QA measures actual spillover and stores it in QA database. As part of primary calibration, the spillover value used during that calibration is stored. The delta spillover calculation using the spillover from primary calibration and the running average of the last five spillover measurements. This information is in the scan file.

Reference Value Test

The output of the x-ray tube is measured as part of a Reference Value (old term was air) measurement. This is measured at various currents between 3mA and 0.150mA.

Note: Not all currents that are ramped to / tested are used to perform

patient scans.

Reference Value measurement

The HE/LE counts are measured as the number of photons counted by detector. This value is used in all bone density calculations. It must be stored in the systems data file. Limits for low/high counts -

• Reference value measurements will be performed at various currents. These reference values are stored separately for all detector elements.

• Reference Value measurements for all current settings are actually made through lucite sections of the secondary calibration block.

Reference value ratio test

The HE/LE ratio for each reference value is calculated for each tube current tested in reference value measurement.

Detector Pre-AMP test

The detector Pre-amplifiers are tested by removing detector bias and verifying that the signal out lines of the detector are not noisy.

Tissue Value Test

Tissue secondary calibration

• The system measures two tissue eqivilent materials (lucite and Acetron).

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-93

• Store measured values for each chamber per element in QA database.

• The system determines the%fat for two different materials with different compositions.

• Three%fat values are displayed - lean, mid and fat

• These calculated%fat values are compared against expected values and checked against limits for the mean, standard deviation.

BM Chamber Measurements

The system acquires point measurements on the 3 bone chambers (approx 12 seconds / measurement) using the 3ma medium scan mode. The system determines the bone mineral content for the three chambers of different sizes and densities.

• Measured values for each chamber are stored on a per element basis in the QA database.

• These calculated BM values are compared against expected values and checked against limits for the mean, standard deviation.

• A slope is calculated and this adjustment is used as a secondary BMD calibration to offset long term drifts in system performance.

Daily QA Results

At the end of Daily QA, a report is automatically printed. If printer is not on line or fails, post an error to screen.

If Daily QA fails, post an error message that says "Unsuccessful QA Recommend repeating procedure."

• If a QA fails the error log will contain detailed information on the failure.

Test results are saved automatically to a database.

Appropriate secondary calibration and Reference Value information is recalculated from QA database using an average of the 3 previous passing test results. This information is stored in each scan file.

A view with plot of medium bone chamber is generated, and user the user is allowed to manipulate data interactively.

2.17.4 QA Database

A historical record of system performance is maintained by storing key QA parameters in a database.

• 3mA Results - fat is hidden - only bone results are viewable

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-94 System Overview PRODIGY Service Manual (Rev C - 2000)

Lunar Corporation

726 Heartland Trail

Madison, WI 53717

1.051 Date 3/20/00 Time 9:07:32 AM

1.007 BMD Medium (High mA) 0.971g/cm

0.971g/cm Deviation -0.82%

0.957 Mean BMD Medium (High 0.971g/cm CV Total Sessions 3

0.907 1/17/00 2/8/00 3/1/00 3/23/00

____________________________________________________________________________

Functional Tests Secondary Calibration Test Value Status Test Mean %CV Status

Block Position Pass BMD

Peaking 1400-3300 Pass Large Batch1 or 2 <=1% Pass

Daily QA Measurement

Trend Summary

Beam Stop <=15 Pass Medium <=2% Pass

Mechanical Test Small <=3% Pass

Transverse 620mm min Pass Tissue

Longitudinal 1980mm min Pass Lean <=50% Pass

Mean % Spillover 5% to 13% Pass Mid <=20% Pass

Spillover Stability -1% to 1% Pass Fat <=10% Pass

Reference Counts Calibration Status Pass

High mA 15% from Primary Cal

Ratio at High mA Ratio Pass

System Status

Pass

Detector Status Pass

*The BMD & Tissue values are Batch dependent and can be found in service options

*Transverse - Total counts/20 with the result in millimeters *Longitudinal - Total counts/10 with the result in millimeters

*Spillover Stability is spillover with respect to time.

Prodigy

LUNAR

(2.10)

Figure 2-23. PRODIGY Daily QA printout with expected values

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) System Overview 2-95

This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is

to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

2-96 System Overview PRODIGY Service Manual (Rev C - 2000)

3 111

Service Software

Chapter 1:Service Software

This chapter contains a discussion of the Service Software and the Error Log.

3.0 Diagnostic Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-103

3.0.1 To Access the Service Software:. . . . . . . . . . . . . . . . . . . 1-103

3.1 The Tools Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.1 Spectrum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.2 Stability Run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.3 Signal Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.4 Primary Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.5 Secondary Verification. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.6 Pileup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.7 Set Download Parameters . . . . . . . . . . . . . . . . . . . . . . . 1-104

3.1.8 enCORE Composer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.1.9 Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.1.10 Copy Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.1.11 User Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.1.12 Service Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.1.13 Outbox. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.1.14 System File Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.2 Tools / Diagnostics Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.2.1 Pileup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.2.2 Calibration Pileup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.2.3 Spillover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.2.4 Count Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.2.5 Scanner Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-105

3.2.6 Scanner Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-106

3.2.7 Scanner X-ray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-107

3.2.8 Lin/Rep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.2.9 Limit Switch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.2.10 Scanner Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.3 Diagnostic Scan Modes - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.3.1 Table Top Scan - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.3.2 Alignment Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.3.3 Beam Wobble scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.3.4 Hacksaw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

PRODIGY Service Manual (Rev C - 2000) Service Software3101

3.4 Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-108

3.4.1 Printing the Error Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-109

3.4.2 Troubleshooting Help software . . . . . . . . . . . . . . . . . . . . 1-110

3.4.3 Reading the Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-112

3.5 Service Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-114

3.5.1 Measure Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-114

3.5.2 Analyze Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-114

3.5.3 QA Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-114

3.5.4 Serial Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-114

Figure 3-1. The Tools/Diagnostics Menu . . . . . . . . . . . . . . . . . . . . . . . 1-104

Figure 3-2. The Error Log Dialogue Box . . . . . . . . . . . . . . . . . . . . . . . . 1-109

Figure 3-3. Error log entry details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-110

Figure 3-4. enCORE Troubleshooting help screen capture. . . . . . . . . . 1-111

Figure 3-5. Sample PRODIGY Error Log . . . . . . . . . . . . . . . . . . . . . . . 1-112

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

3-102Service Software PRODIGY Service Manual (Rev C - 2000)

3.0 Diagnostic Software

Note: GE-LUNAR Diagnostic software options are not available to

the customer. This software is available to GE-LUNAR authorized representatives only.

the customer. The software will return to operators mode as soon as the software is exited and restarted. The operator mode may also be changed under the Tools/User Options menu.

• The Diagnostic Software is available through the User Options Tab

When the software is used in the diagnostic / service mode, the Engineer performing service must verify that the scanner is taken out of service mode before returning control of the scanner to

The Service software gives the Technician access to all areas of the PRODIGYSoftware, DO NOT adjust AGS subsystem settings.

3.0.1 To Access the Service Software:

• Start the PRODIGYSoftware by double clicking the PRODIGY Icon on the desk top

• Double click the Too l s option on the menu bar

• When the drop down menu appears double click on User Options

• Double click on the Systems Tab on the dialogue box

• Click on Service under Display Mode

• When prompted enter the password Award (versions 2.05 and greater)

Smile versions lower than 2.05)

Note: the password is case sensitive

• The Tools option on the menu bar will now contain Service Options, and Service scanning options will also be available under the F2 Measure

Option

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Service Software3-103

3.1 The Tools Menu

3.1.1 Spectrum

Allows the service engineer to view and print the raw energy spectrum for the detector. The detector can also be repeaked from Spectrum.

3.1.2 Stability Run

Used for the detection of arcing and testing the detectors performance

3.1.3 Signal Monitor

View count rates for low and high-energy channels for the detector.

3.1.4 Primary Calibration

Used to calibrate the PRODIGY scanner See DXAP@002 PRODIGY Primary Calibration Procedure Chapter 5 Appendix C.

3.1.5 Secondary Verification

Used in the manufacturing process

Figure 3-1. The Tools/Diagnostics Menu

3.1.6 Pileup

Used in the manufacturing process

3.1.7 Set Download Parameters

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

3-104Service Software PRODIGY Service Manual (Rev C - 2000)

Download and verify the Firmware versions for the (c)SBC.

3.1.8 enCORE Composer

This is not a service tool - (Physical and Business Report Generator - see the enCORE Operator’s Manual for information).

3.1.9 Error Log

Ability to view and print the contents of the diagnostic error log (see section

3.4)

3.1.10 Copy Configuration

Ability to copy the scanners Error log, Configuration Files and / or QA Database to a drive on the host PC - useful when a host PC is replaced or when diagnostic information needs to be sent to GE-LUNAR.

3.1.11 User Options

Set up user configured options for the scanner.

3.1.12 Service Options

Service Mode scanner configurations (see section 3.5).

3.1.13 Outbox

Configure Printing, E-mail and Faxing options.

3.1.14 System File Editor

Edit system settings for the enCORE software - do not alter these settings without GE-LUNAR Customer Support authorization.

3.2 Tools / Diagnostics Menu

3.2.1 Pileup

Determines Detector parameters for multiple events occurring simultaneously

- not used for service.

3.2.2 Calibration Pileup

Not used for service.

3.2.3 Spillover

Perform and Acquire a Spillover Measurement (test of source spectrum and/ or detector resolution).

3.2.4 Count Rate

Acquire and print Reference Counts (count rate of detector must be performed through lucite).

3.2.5 Scanner Motion

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Service Software3-105

Control manually and perform scanner motion diagnostics and motion configuration.

•Motion Tests Tab

•Limit Switch Monitor - used to verify limit switch status

•Limit to Limit Test - used to verify limit switch positions

• Configure check box- this box must be checked when limit to limit is run to establish the scanners range of motion (scan window).

•Cable Stress Test - used to cycle Transverse and Longitudinal Mechanics - can be used to check new cables / check for binding

•Home scanner - moves mechanics to Home position

•Motion Commands Tab

•Home Position - change Arm Parking position from head to foot does not effect where the daily QA (Secondary calibration) is performed - Move to Home - sends scan arm to home position.

Note: When the Home position is changed from the head end of the

table to the foot or vice versa, the Limit to Limit test (see Motion Tests tab above) must be run with the Configure box selected.

•Move Steps - move the scan arm to a specific location on the table move Absolute moves an absolute distance from home, Move Relative - move relative to last position

•Joystick and Laser - Enable and Control Scanner Motion manually, change motor speeds, toggle laser on and off

•Lower portion of the screen displays the status of limit switches, scan arm position, and positioning switch (joystick) status.

•Find Block Tab

•Secondary Calibration - can be used to find / verify that the scanner is able to find the different chambers on the secondary calibration (daily QA) block. THis tool can be useful for troubleshooting “cannot find Block errors” and for Transverse binding issues.

3.2.6 Scanner Detector

•Detector Tests Tab

•Gain Control - adjusts the gain on the AGS amplifier used in the detector peak setting - peak adjusts only the AGS amplifier.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

3-106Service Software PRODIGY Service Manual (Rev C - 2000)

•Bias Control - adjusts the bias of the detector. PRODIGY Systems run with detector bias on demand (when x-rays are present) of 450VDC.

•DCA window settings - view DCA window settings - these settings should not be edited.

•Detector status - allows the service engineer to view the detector status real time - information displayed includes Peak setting Bias setting, and DCA window settings.

•Detector AGS Tab

•AGS DAC control (verify AGS DAC settings), check on detector rollover, and check on channel count rates.

DO NOT adjust the detector Bias, DCA windows or AGS DAC settings changes in the Detector bias, DCA windows or AGS DAC’s can change the scanner’s results.

•AGS Mode - the operate / calibrate signal (disables the AGS systems so that the detector can be peaked correctly) can be toggled.

3.2.7 Scanner X-ray

•X-ray Tests Tab-

•Manual Test - Control Manually the Shutter, X-ray on Indicator and patient Positioning laser

•Automatic test - automatically toggle the Shutter, Laser and X-Ray Relay

•X-Ray Source - Turn on source (ramp and make x-rays), warm up a tube head at install or replacement.

•X-ray cycle test - cyclically ramp the source - (can be used to test ramping failures or for arcing)

•X-rays Tab

•Ramp the kV and / or the mA of the x-ray generation system and view feedback real-time. Faults are displayed and polled real-time in the window on the right.

•Ports Tab - view status of and send commands to (c)SBC ports (see section 2.4 for (c)SBC port definitions).

•Download Tab - identical to Set Download Parameters (section

3.1.7)

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Service Software3-107

•Misc. Tab- not used for service.

3.2.8 Lin/Rep

Not Used for Service

3.2.9 Limit Switch Adjustment

Verify and Adjust Limit switch positions.

Note: When using Limit Switch Adjustment, DO NOT alter the

default settings.

3.2.10 Scanner Disconnect

Disconnect the scanner from the PRODIGY software (reset the (c)SBC).

3.3 Diagnostic Scan Modes -

Performed under F2 Measure - only visible when the scanner is in service mode.

3.3.1 Table Top Scan -

Not used in Service

3.3.2 Alignment Scan

Verify that the Source and Detector maintain a constant count rate in all areas of the scan table. Also useful for testing cables.

3.3.3 Beam Wobble scan

Quantifies beam movement relative to the detector when the scanners mechanics are moving (see DXAP2010 Chapter 5 Appendices).

3.3.4 Hacksaw

Calculates and sets correcton factors to align bone edges in scans (see DXAP 2007 Chapter 5 Appendices).

3.4 Error Log

• The PRODIGYwill maintain an error log file whenever the scan table is in

• The error log is one of the best troubleshooting tools for scanner

operation. All errors, fatal or nonfatal will be logged here. The Error log gives a brief description of the error and if possible the origin of the fault.

malfunction.

Note: To aid in a quick and accurate response when requesting

assistance from GE-LUNAR, please have an error log available for review by GE-LUNAR Customer Support.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

3-108Service Software PRODIGY Service Manual (Rev C - 2000)

The error log file is named errorlog.bin, this file is the current error log session. Older sessions are named errorlog.1, errorlog.2 and so on up to errorlog.4.

When requesting help from GE-LUNAR, E-mailing the current error log file and a description of the symptoms will aid in a rapid diagnosis (see Copy Configuration in section 3.1.10 for information on copying the error log to an E-mailable file).

3.4.1 Printing the Error Log.

Note: The scanner does not have to be in Service mode to view or

print the Error Log.

• The Error Log is located under the Tools dropdown menu. Left click on Tools / and then on Error Log.

Figure 3-2. The Error Log Dialogue Box

• Session - The PRODIGYsoftware will maintain up to 10 “sessions” each session is up to 100 errors.

•A new session is created by shutting down and restarting the enCORE software. A new session may also be started by clicking on the button

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

PRODIGY Service Manual (Rev C - 2000) Service Software3-109

•To view a session, left click on it, all errors (if present) will be shown in the box below.

•The Errors list may be printed (click on print errors) or it may be searched with the Find Error button.

•The details of the failure are shown when the error is highlighted and then right clicked on.

Figure 3-3. Error log entry details

3.4.2 Troubleshooting Help software

This feature is found in software versions 2.26 and greater. When an error is highlighted and the Troubleshoot button is clicked on, it opens an online enCORE troubleshooting guide to assist the service engineer in troubleshooting the system by error code.

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to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.

3-110Service Software PRODIGY Service Manual (Rev C - 2000)

GE Medical Systems PRODIGY, LUN7396 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

READ THIS FIRST

1.0 General Safety

1.1 Symbols and labels found on the PRODIGY

1.1.1 External Symbols

1.1.2 Internal Symbols

1.1.3 Labels

1.2 Emergency Stop Button

1.3 Laser Exposure

1.4 Shutter Indicator

1.5 Cautions, Warnings, and Notes

1.5.1 Caution Statements

1.5.2 Warning Statements

1.5.3 Note Statements

1.6 Safety Concerns

1.6.1 Pinch points

1.6.2 Laser safety

1.6.3 Radiation safety

1.6.4 Scatter Radiation

1.7 Controlling Computer and Accessories

1.7.1 Electrical Safety

1.7.2 Electromagnetic interference

1.7.3 Peripheral Configurations

1.7.4 Standard room configuration (system no. DF+12000 and greater)

1.7.5 Small room configuration (system no. DF+12000 and higher)

1.7.6 Scanner power output configuration (system no. DF+11999 and lower)

1.7.7 Wall outlet configuration (system no. DF+11999 and lower)

2.0 PRODIGY System

2.0.1 PRODIGY Electronics

2.1 Electronics

2.1.1 Cautions

2.1.2 Electronics Pan

2.1.3 Scan Arm

2.1.4 Power specifications

2.2 PRODIGY Block Diagrams

2.2.1 PRODIGY I (System numbers DF+11999 and lower) Power Distribution Block Diagram (AC entrance)

2.2.2 PRODIGY System Block Diagram PRODIGY I System Block Diagram

2.2.3 PRODIGY I Peripheral Configuration Block Diagrams

2.2.4 PRODIGY II System / Power Block Diagram

2.3 PRODIGY Fusing

2.4 PRODIGY I (system numbers DF+11999 and lower) Single Board Controller

2.4.1 SBC Functions

2.4.2 SBC Reset

2.4.3 SBC / Host PC Interface

2.5 PRODIGY II Combined Single Board Controller (cSBC) (systems DF+12000 and greater)

2.5.1 cSBC System Architecture

2.5.2 cSBC Functions

2.5.3 TRANS / LONG MOTOR Control and Status

2.5.4 AGS ROLL

2.5.5 AGS DAC

2.5.6 SCANNER RESET

2.5.7 GE-LUNAR Model 7861 X-ray Generator Errors

2.5.8 DC FAIL

2.5.9 DCA / AGS / BIAS DAC's

2.5.10 KV/mA DAC

2.5.11 ARC/FIL DAC

2.5.12 PEAK DAC

2.5.13 MAX PLD Peripherals

2.5.14 Interrupts

2.5.15 MASTER RESET

2.5.16 SUICIDE RESET

2.5.17 MISC OUT

2.5.18 MISC IN

2.5.19 Stepper Motor Control

2.5.20 OMI Input

2.5.21 Patient Positioners

2.5.22 Limit Switches

2.5.23 X-ray Source Control / Mechanical Interlocks

2.5.24 Shutter / Collimator Drive

2.5.25 End of Exposure Alarm

2.5.26 Panel LED's

2.5.27 HVPS Control

2.5.28 ADC

2.5.29 mA Low Range

2.5.30 Detector Interface

2.5.31 Communications Ports

2.5.32 Debug RS-232 Port