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Discovery QDR Series Technical Manual

6-10

block and pin line up, the alignment brackets need to be repositioned. (Check
captive screws and jam nuts.)

2. If you align the X-ray beam to both drop-off points but the range is narrow, (on

aperture 10 you should have 3-8 turns of the hex driver) the collimator cup and/or
the pre-collimator disk on the X-ray tank may be misaligned.

Using glow paper, assure that the X-ray beam is hitting the front and back on the
detector array equally. If not, this may indicate that the X-ray tube has shifted
within the letharge. Perform further verification before replacing the X-ray tank.

3. If the aperture and detector array window are aligned, remove the aperture

assembly and inspect the cup and disk. Look for any debris or lead fragments.
When replacing the cup and disk, align the apertures as closely as possible to the
detector array window.

6.12.2 System Fails X-Ray Beam Alignment Verification

Align the X-ray beam and recalibrate the aperture. If this fails, inspect the aperture
assembly for any loose hardware or excessive play in the aperture plate. Check the
aperture assembly encoder’s belt tension. Tension should be set to 2.5 lbs. If the belt is too
tight, it may cause encoder readback errors and cause the calibration program to fail.

6.13 Detector Flattening Problems

6.13.1 System Consistently Fails the Detector Flattening Pro-
cedure

1. Check for loose, misaligned, or defective Aperture Assembly, Collimator Cup, or

Pre-collimator Disk. (Refer to X-ray Alignment Problems above.)

2. If the X-rays are unstable or “dancing”, monitor the X-rays on the X-RAY SUR-

VEY bar graph screen for any amplitude shifting of the defective signal display.

3. If shifting is taking place, check/replace the X-ray Controller Assembly and X-

ray Tank connections. Check the X-ray peak potential and tube current wave-
forms and monitor for waveform distortion. This may indicate a defective inter-
connection cable, X-ray Tank, or power supply.

4. Check output signal level. You may have to reset the ADC gain level.

5. Check for bad detectors in the Detector Assembly. Run the DAS test in SQVER-

IFY.

6. Check the Filter Drum to see that it is installed correctly. Check the segment

readback values in X-Ray Survey with X-rays ON.

7. Check for lead fragments in the X-ray beam. Inspect the Collimator Cup, disk,

and Aperture Assembly.

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Содержание DISCOVERY A

Страница 1: ...ries FAN BEAM X RAY BONE DENSITOMETER TECHNICAL MANUAL Hologic Inc 35 Crosby Drive Bedford MA 01730 USA Phone in US 800 321 4659 Fax Domestic 781 280 0670 Fax International 781 280 0671 Document 080 1...

Страница 2: ...The Discovery QDR Series Fan Beam X ray Bone Densitometer produces ionizing radiation in the form of X rays It may be dangerous to the patient operator or field engineer unless safe exposure factors a...

Страница 3: ...tion 1 14 1 3 9 Measurement Criteria for Technique Factors 1 14 Chapter 2 FUNCTIONAL DESCRIPTION 2 1 Computer 2 1 2 2 PCI Communications Controller Board 2 1 2 2 1 Interface Connections 2 1 2 3 Distri...

Страница 4: ...nly 2 27 2 13 1 Power 2 27 2 13 2 Interface Connections 2 27 2 14 Torroid Power Module and DIN Rail 2 29 Chapter 3 INSTALLATION 3 1 Pre Installation Requirements 3 1 3 1 1 Required Tools 3 1 3 1 2 Req...

Страница 5: ...5 7 Scan Thickness Measurement Calibration C and W 3 61 3 5 8 Scan Thickness Measurement Calibration A and SL 3 61 3 5 9 Calibration of Area and BMC for Array Scan Modes 3 62 3 5 10 RECALYZE and Add...

Страница 6: ...Thickness Measurement Calibration A and SL 4 36 4 14 3 Calibration of Area and BMC for Array Scan Modes 4 37 4 14 4 RECALYZE and Add Array AP Scans to the QC Database 4 38 Chapter 5 REMOVE AND REPLAC...

Страница 7: ...l Converter Board A Model only 5 30 5 8 Aperture Assembly FRUS 5 31 5 8 1 Aperture Stepper Motor 5 31 5 8 2 Aperture Motor PCB 5 32 5 8 3 Aperture Position Belt 5 32 5 8 4 Rotary Potentiometer 5 33 5...

Страница 8: ...ications 6 12 6 15 2 Tank Top Cover Components and Screw Location 6 12 6 15 3 Tightening the Lexan Cup Screws 6 13 6 15 4 Tightening the Bladder Gasket Screws 6 13 6 15 5 Tightening the Transformer Se...

Страница 9: ...fixed Since testing is performed by fan beam method rather than by flooding the area as in conventional radiography the scanning time is a function of the dimensions of the area to be measured the de...

Страница 10: ...y tube in a common shielded enclosure is mounted beneath the patient on the C Arm It generates a narrow tightly collimated fan shaped beam of X rays which alternate at power line frequency between 100...

Страница 11: ...t k depends on the tissue attenuation characteristics of the beam In the Discovery k is continuously measured using the tissue segment in the filter wheel The program works in the following manner 1 L...

Страница 12: ...Q shifts when bone equivalent material is interposed by the filter drum 9 Calculate the total bone mineral values by adding up the Q values for all bone points in each region of interest e g each ver...

Страница 13: ...n a command fails The Motor Control subsystem of the scanner is controlled by the Distribution Board All motor movement commands are routed through the Distribution Board to the individual Motor Drive...

Страница 14: ...rface the PC to the Scanner A modem card is provided for remote communications with other PCs A Network Interface Card NIC is installed to control communications with the Hologic QDRNet or a DICOM net...

Страница 15: ...s to the Motor Driver Boards The addressed Motor Driver Board converts these digital commands into analog signals that are strong enough to drive the motors A Position Encoder attached to the idler pu...

Страница 16: ...nchronize the filter drum with the AC line waveform The last set of command signals is sent to the Detector Assembly to synchronize the acquisition of data with the production of the X rays from the s...

Страница 17: ...and W only TZ Stepper Motor Driver Controls the motion of the Patient Table left and right pedestal motor and monitors table position information from the string encoders A and SL only AR Stepper Mot...

Страница 18: ...spine in AP and lateral projections proximal femur hip IVA Spine and forearm W Lumbar spine in AP and decubitus lateral projections proximal femur hip forearm IVA spine AP only and whole body C Lumba...

Страница 19: ...ootprint Length Width Height m inches m inches m inches Table extended A W 3 02 119 1 50 59 1 42 56 Table not extended A W 2 02 79 5 1 22 48 1 42 56 C SL 2 02 79 5 1 40 55 1 42 56 Average Heat Load AL...

Страница 20: ...Array A SL 8 0 240 L1 L2 L3 L4 0 70 1 0 Lat Spine Fast A SL 6 0 120 L1 L2 L3 L4 0 35 1 0 Hip High Def All 6 0 123 Femur Total 0 20 1 0 Hip Array All 6 0 62 Femur Total 0 20 1 0 Hip Fast All 6 0 31 Fe...

Страница 21: ...80kV 1 3 5 Measured Half Value Layer HVL At Different Operat ing Potentials 1 3 6 Line Voltage and Maximum Line Current 1 3 7 Technique Factors for Maximum Line Current Peak Potential 140kVp Tube Curr...

Страница 22: ...he voltage peak is measured with an oscilloscope Voltage is a squarewave pulse Peak is defined as the peak voltage of the 4 millisecond pulse discounting any initial overshoot Current Current is measu...

Страница 23: ...e PCI Communications Controller Board handles all the communications between the Computer and the Scanner C Arm and Table assemblies The board resides in one of the computer internal ISA slots and com...

Страница 24: ...nchronous Data from the Scanner JP1 34 JP1 10 JP10 18 JP10 19 SRCLK SRCLK Synchronous data clock from PCI Communication Command Board to Distribution Board Synchronizes data from the Scanner JP1 11 JP...

Страница 25: ...ards depending on instrument model Four cables connect to the four Motor Controller Boards Table X Table Y Arm R and Arm Y A single cable connects to the TZ Drive Board Two cables one signal and one p...

Страница 26: ...of the 28 on QDR 4500s 24 on Discovery 24 15 15 7 and 5VDC ON indicates the respective voltage is present Five red LEDs indicate the status of the five circuit breakers applying voltage to the motor...

Страница 27: ...r that divides a 3V reference source The output voltage is fed to a sense amplifier in proportion to the position of the mechanism driven by the motor The sense amplifier output is converted to digita...

Страница 28: ...Interconnection Descriptions 2 5 TZ Drive Board A and SL Only The TZ Drive Board is a microprocessor controlled power driver circuit for the two AC pedestal motors which raise and lower the patient ta...

Страница 29: ...ning If this occurs you must wait about 20 minutes before functionality is restored Table 2 4 TZ Drive Service Switches 2 5 2 Power Power input to the TZ Drive Board is 24VDC from the Distribution Boa...

Страница 30: ...onnector and pin assignments Figure 2 4 Distribution Board TZ Drive Board Interconnection Diagram Table 2 4 shows the interconnections between the Distribution Board the TZ Drive Board the Pedestal Mo...

Страница 31: ...6 6 5V Not used JP1 2 JP1 3 Signal Description Pin 120V A _LEFT AC voltage 120 to drive the Left Pedestal motor JP6 4 120V B _LEFT AC voltage 120 to drive the Left Pedestal motor JP6 5 120V A _RIGHT...

Страница 32: ...ution Board The 7 is reduced to 5VDC to power the circuitry on this board and is applied to the Operator Control Panel to power the LEDs A green LED on this board provides a visual indication of the 5...

Страница 33: ...ndicator from the PCI Communication Command Board via the Distribution Board JP2 13 JP2 14 XRAY_LIGHT XRAY_LIGHT X Ray Light from the X Ray Controller via the C Arm Interface and Distribution Boards J...

Страница 34: ...er LED JP6 18 JP1 18 XRAY_LIGHT_PWR Turns on the X_RAY LED JP6 19 JP1 19 SW0 Control signal to determine the state of the C ARM and LASER switches JP6 4 JP1 4 SW1 Control signal to determine the state...

Страница 35: ...this board provide a visual indication of the Reference Drum operation Generate 7VDC for the DAS system 2 7 1 Continuity Daisy Chain The C Arm Interface Board is part of two linked chains of boards R...

Страница 36: ...P1 9 JP1 10 JP1 9 JP1 10 STFRM STFRM Synchronous channel data frame from PCI Board through the Distribution Board to the DAS JP1 12 JP1 13 JP1 12 JP1 13 ATD_CARM ATD_CARM Asynchronous Data from the fr...

Страница 37: ...or Integrate period Generated by the C Arm Interface Board JP1 33 JP1 34 JP1 33 JP1 34 SYSRST_CARM SYSRST_CARM Resets the C Arm Interface Board JP1 39 JP1 40 JP1 39 JP1 40 EMERGENCY_CARM HW_EMGNCY_RET...

Страница 38: ...n Module It also receives command and timing data from the C Arm Controller Board and it provides a line frequency timing signal and housekeeping and diagnostic data to the C Arm Interface Board 2 8 1...

Страница 39: ...P12 7 JP12 8 JP7 7 JP7 8 JP3 4 JP3 23 XR_kV1 XR_kV1 XR_kV0 XR_kV0 Selects the X Ray beam energy 80 100 120 or 140kVp JP12 9 JP12 10 JP12 11 JP12 12 JP7 9 JP7 10 JP7 11 JP7 12 JP3 5 JP3 24 JP3 6 JP3 25...

Страница 40: ...reference voltage is selected and fed to one of four circuits that control the high voltage peak potential The circuits adjust the reference voltage through four potentiometers R55 R54 R39 and R40 th...

Страница 41: ...ament voltage Refer to Table 2 11 for pin assignments 2 9 X Ray Source Unit The X Ray Source commonly referred to as the Tank assembly consists of the X Ray tube the X Ray tube filament transformer th...

Страница 42: ...he software The Detector Assembly is located in the upper end of the C arm directly above the X ray source There is a lead radiation shield between the detector board and the cover to stop any X rays...

Страница 43: ...000 Digital Signal processor to generate all the control signals necessary for the Detector Assembly This processor also provides a high speed serial data link to the computer 2 10 4 Power The 128 Cha...

Страница 44: ...l board JP10 12 JP10 13 P1 3 P1 4 SRCLK SRCLK Synchronizes data from the Analog Digital Converter board JP10 15 JP10 16 P1 6 P1 7 SRFRM SRFRM Synchronizes DSP Communications JP10 18 JP10 19 P1 9 P1 10...

Страница 45: ...ense this light and convert the light into current which is amplified in a current to voltage converter Output from the amplifier is applied to the Integrator through analog switches The analog switch...

Страница 46: ...parallel to the Analog to Digital board Switched signals from the Solid State Detector board charge integrating capacitors on this board during a given charging time After the charging time the switc...

Страница 47: ...s located on this board convert this voltage to 12V to power circuitry contained on this board Analog and digital returns are kept separate 2 12 2 Interface Connections Figure 2 11 shows the interconn...

Страница 48: ...31 JP7 29 JP7 31 MGN1 MGN2 IN12 IN13 Controls integrator multiplexor gains JP4 25 JP4 27 JP7 25 JP7 27 LTCH1 LTCH2 IN16 Latches control signals on Integrator Multiplexor JP4 33 JP4 37 JP7 33 JP7 37 IN...

Страница 49: ...w be used with all Discovery systems This processor also provides a high speed serial data link to the computer Note Jumper JP5 on the ADC board is used to select between high and low resolution so th...

Страница 50: ...board JP10 12 JP10 13 P1 3 P1 4 SRCLK SRCLK Synchronizes data from the Analog Digital Converter board JP10 15 JP10 16 P1 6 P1 7 SRFRM SRFRM Synchronizes DSP Communications JP10 18 JP10 19 P1 9 P1 10...

Страница 51: ...our wire cable providing split 240 volts to the DIN Rail Refer to Figure 3 1 and Figure 3 2 for a drawing of the C W or A SL versions of the DIN Rail From the DIN Rail unfiltered AC is fed to the line...

Страница 52: ...Discovery QDR Series Technical Manual 2 30...

Страница 53: ...wrench Hex driver Allen wrench set including sizes 1 16 5 64 3 32 7 64 1 8 9 64 5 32 3 16 7 32 and 1 4 24 Inch Digital Level 099 0269 Oscilloscope and digital multimeter Survey meter Victoreen model...

Страница 54: ...the following table to prepare for the move Also Figure 3 1 through Figure 3 4 for more details Figure 3 1 System Dimensions for Discovery A Model Minimum Room Size Minimum Doorway Width SL C 2 44m 8...

Страница 55: ...Discovery QDR Series Technical Manual 3 3 Figure 3 2 System Dimensions for Discovery C...

Страница 56: ...Discovery QDR Series Technical Manual 3 4 Figure 3 3 System Dimensions for Discovery SL...

Страница 57: ...ure 3 4 System Dimensions for Discovery W The Operator s Console may be up to 45ft 13 72m away from the Scanner but since leakage and scatter radiation levels are extremely low it can be safely locate...

Страница 58: ...g damage Bring any damage discovered to the attention of the customer s Shipping Receiving department before proceeding Figure 3 5 Crated Unit Discovery A and SL DISCOVERY A DISCOVERY C DISCOVERY SL D...

Страница 59: ...the wooden table shelf and the boxes packed with the unit Note There is a metal cross brace attached to the wooden table shelf Remove and save this cross brace as it is used later in the installation...

Страница 60: ...d As you make your way from the loading dock to the room measure all doorways and openings including any elevators on which you must travel Look for other obstacles thresholds steps sharp corners etc...

Страница 61: ...s Phillips that secure the tabletop in place located on top of the table near the rear center and slide the table to the left far enough to access the Table X bearing blocks 4 Referring to Figure 3 7...

Страница 62: ...e Figure 3 8 2 Remove the table locking bracket located on the left side of the scanner see Figure 3 9 3 Move the table forward remove the C Arm Interface board cover and remove the tank cover Then mo...

Страница 63: ...Remove the Arm Y bearing blocks at the rear of the arm 9 Remove the bracket that connects the C arm to the Arm Y belt 10 Lift the C arm carriage up and out of the scanner unit 11 Tape or tie wrap the...

Страница 64: ...Slide the tabletop to the right until it clears the table base panel 4 Referring to Figure 3 10 adjust the Table End Stop as pictured Figure 3 10 Table End Stop Models A W and Wi 3 2 8 Move Unit To D...

Страница 65: ...it from dropping when moved Figure 3 12 Re tighten Caster Bar Screws 2 Locate the two off load ramps supplied with the unit Ramps are attached to the shipping skid base Figure 3 13 Figure 3 13 Off loa...

Страница 66: ...skid 5 If hallways to the destination room are wide enough to move the unit in the hori zontal position move the unit and everything that shipped with it to the destina tion room Continue the install...

Страница 67: ...brace located in the separate shipping box Figure 3 16 Figure 3 16 Caster Bars Installed 2 With two people tip the unit on end Figure 3 17 and Figure 3 18 cardboard or equivalent can be used to protec...

Страница 68: ...s and cross brace Position the unit in its final location in the room 3 Level the unit 4 Remove the 2 carriage to base shipping brackets Figure 3 19 5 Discovery A W Wi Remove the table end stop Figure...

Страница 69: ...dure below to install a Discovery A or Discovery SL upper C arm assembly 1 Refer to Figure 3 20 Reposition the belt tensioning mechanism The belt ten sioning mechanism is turned around to facilitate s...

Страница 70: ...e needed if the tank is ever removed 15 Level the scanner left to right 16 Level the system front to back be sure the scanner table top is level 0 0 0 front to rear at both the head and foot ends Fail...

Страница 71: ...Pole Power Cable 180 0626 Circuit Breaker 310 0053 15 Amp 2 Pole Power Cable 180 0621 TB1 Input Power Black Brown Whire Blue Green Grn Yel L L N N G G TB2 Transformer Power 7 7 6 6 5 5 4 4 3 3 2 2 1 1...

Страница 72: ...n in the tables below Circuit Breaker 310 0006 7 5 Amp 2 Pole Power Cable 180 0622 120 VAC 50 60 Hz Wire From To Blue Circuit Breaker Load Pin 1 TB2 Brown Circuit Breaker Load Pin 7 TB2 Blue Jumper Pi...

Страница 73: ...ing 13 Replace the cover of the Torroid Assembly 14 Route the Operator Console AC Supply Cable through the cable clamp block on the rear of the Scanner 15 Attach the Console Power Cord to the top powe...

Страница 74: ...Discovery QDR Series Technical Manual 3 22 Figure 3 22 DISCOVERY C and W DIN Rail AC Input Output Wiring Diagram Figure 3 23 Discovery A and SL DIN Rail AC Input Output Wiring Diagram...

Страница 75: ...nal standard defines the BROWN conductor as LINE and the BLUE as NEUTRAL Note Be sure to change the label if you re strap the transformer SAFETY PRECAUTIONS There are a number of safety precautions th...

Страница 76: ...using the enclosed instructions Place the computer keyboard monitor and printer on the cart 2 Install computer system and power cables 3 Turn on the computer and confirm that all options shipped with...

Страница 77: ...cket to guide rail gap again Compare them to their original values 5 If all the measurements are within specification the table is properly aligned If the measurements are not within specification go...

Страница 78: ...are securely fastened to the upper and lower frames Note Even if the brackets are secured to the frames they may not be securely fastened to the pedestal If not remove the table to access the screws t...

Страница 79: ...emove the outer and inner covers from the left pedestal 2 Loosen the four bolts fastening the top of the pedestal and the four bolts fastening the bottom of the pedestal Note Before adjusting the dist...

Страница 80: ...g x10 probes Time base 5 0ms div Trigger on line positive slope Set Vertical Mode to Add Invert Channel 2 Connect Channel 1 to TB1 PIN 12 on the tank Connect Channel 2 to TB1 PIN 11 on the tank 2 Grou...

Страница 81: ...oximately 4ms in duration with a peak amplitude of 14V and 10V respectively corresponding to 140kVp and 100kVp inside the tank Figure 3 18 Peak Potential Mode 3 If the scope trace seen is not as shown...

Страница 82: ...e X Ray Survey Utility by selecting Utilities Service Utilities X Ray Survey see X Ray Survey on page 9 1 for information on the utility 6 Change X ray Mode to1 and Aperture to 7 Note On Ci and Wi sys...

Страница 83: ...ignore the overshoot and mea sure current on the back after it settles out This corresponds to 10mA 35 tube current If the scope trace seen is not as shown in either Figure 3 19 or Figure 3 20 the sy...

Страница 84: ...3 Tighten the two mounting bolts holding the tension block 3 4 3 4 Adjust Table Y Belt Tension 1 At the encoder end of the belt loosen the 2 bolts holding the tension block 2 Install the tension spri...

Страница 85: ...pt type MOTOR XX Enter where XX equals TZ AY TY TX or AR depending on which motor you are calibrating 3 4 4 1 MOTOR TZ Discovery A and SL only 1 Select the TZ motor device driver by typing MOTOR TZ En...

Страница 86: ...adjust the Linear Rotary String Encoder See Adjustment on page 5 15 for details 8 Calibrate the TZ motor lower left and lower right encoder positions to a range of 250 300 and a difference of no more...

Страница 87: ...PosLimit The encoder readings for the negative downward and positive upward mechanical stops In normal operation the TZ microprocessor uses the right pedestal readings for closed loop control so these...

Страница 88: ...n one inch increments until the motor hits the right mechanical stop The program plots the encoder data during the scan in raw encoder units 0 4095 Note Press Esc anytime during the scan to abort the...

Страница 89: ...ce The position tolerance in encoder ticks for absolute moves The calibration program sets this field to the value found in the corresponding calibrate_position field in the MOTOR_AY PRO file 2 3 2288...

Страница 90: ...to the left and prompts 3 The program moves the TY motor to the left When TY hits the left mechanical stop the first time press Esc 4 Check the position value It must be 3750 5 Adjust if necessary If...

Страница 91: ...ram computes the linear fit for both the positive and negative motion The linear fit parameters are displayed at the top left and top right of the plot in the form Y Intercept Slope X The two slopes e...

Страница 92: ...3 Press Enter and the program prompts 4 The program moves the table to the front When TX hits the outer mechanical stop for the first time press Esc 5 Check the position value It must be 1000 5 Adjust...

Страница 93: ...op right of the plot in the form Y Intercept Slope X The two slopes 87 0 and 86 9 in the example below should be within 0 3 of each other The program displays the positive and negative limits as horiz...

Страница 94: ...of the table Con firm that the level is still at 0 0 degrees Adjust the leveling feet as necessary to obtain this result Failure to perform this step will result in positioning toler ance errors on w...

Страница 95: ...ter 10 Repeat the calibration procedure above but now when AY hits the left mechani cal stop press Enter Wait until the rotation completes and then repeat the calibration procedure above but now when...

Страница 96: ...imit 14 Press ENTER The program prompts and moves the C arm back to the approximate 83 position The program then prompts 15 Place the digital level on top of the X ray tank assembly and use the Table...

Страница 97: ...the calibration procedure When the calibration scan completes the program computes the linear fits to the positive and negative rotation The linear fit parameters are displayed at the top left and top...

Страница 98: ...3 50771 5601 NumberOfSteps StepDistance The number of motors steps corresponding to the step distance in minutes of rotation The ratio of these two numbers determines the step size The calibration pro...

Страница 99: ...MOTOR_AR DAT Enter at the MOTOR AR prompt in SQDRIVER 3 4 5 X Ray Beam Alignment It is crucial that the X ray beam be precisely aligned with the detector array because improper alignment will directly...

Страница 100: ...and Wi models Hi gain to 2 Lo gain to 1 and X ray Mode to 3 A B D C Fixture C Arm Detector Opening View from Front Step A Insert the left side of the Alignment Fixture into the left side of the Detec...

Страница 101: ...0 to move the Aper ture Plate right or move_aper_rel 100 to the move Aperture Plate left until the Alignment Pin is both vertical and perpendicular to the Aperture Plate Place the block on the base pl...

Страница 102: ...at graph with an amplitude of approximately 5 5 volts with the alignment fixture installed approximately 6 5 volts with alignment fixture removed volts If thebeam alignment is not correct perform the...

Страница 103: ...ray mode to 3 16 For Display click Graph 17 For Segment click Air 18 Click X ray F2 to turn on x rays The next 5 steps adjust the beam side to side 1 Move the front Filter Drum alignment screw until...

Страница 104: ...mall wrench use of excessive force will change the beam alignment After the jam nuts are snug re check the graph for proper beam alignment Note The X rays should still show peak amplitude 4 Turn off t...

Страница 105: ...llow the procedure in step 3 while checking detectors number 44 and 171 to check for the fall off of x rays 8 Tighten the four X ray Detector Assembly alignment nuts 9 Click X ray F2 to turn x rays of...

Страница 106: ...click the Cancel button 9 Turn on the laser Locate the 3 laser adjustment screws small Phillips under the C arm Adjust these screws to tilt the assembly until the laser crosshair is on the tip of the...

Страница 107: ...ss absolutely necessary as defined by Check and Verify the A D Gain on page 3 54 1 Adjust the A D gain potentiometer to achieve an average X ray signal of 6 25V 2 Check that all detectors are within a...

Страница 108: ...whole beam move it until it does Keep the phantom as straight as pos sible 8 Turn off X rays with the F2 key and press Esc to exit X Ray Survey Reboot the PC logon as Field Service and restart the sof...

Страница 109: ...ignment of the spine phantom to the laser 12 Change Scan Length to 6 0 inches and click Start Scan to perform the AP scan 13 When scan has finished select Spine as the analysis method and click Next 1...

Страница 110: ...18 When the scan has finished press and hold the Enable Lateral switch to return the system to AP position 19 Analyze the lateral scan refer to User Guide for instructions if necessary When done click...

Страница 111: ...nd the meter indicates a spike in the reading If this occurs you must then move the probe one meter approx 40 along the beam from that spot to determine if the leakage is within acceptable levels The...

Страница 112: ...Calibration of Area and BMC for Array Scan Modes c Adding Array AP scans to the QC database Follow the procedure in order and exactly as shown for each stage of the calibration Note If the Discovery b...

Страница 113: ...ick the Close button to exit the Analysis screen 9 Start the Field Service Calibration program by selecting Utilities Service Utili ties Field Service Calibration from the Discovery Main Menu screen 1...

Страница 114: ...nent 9 Press and hold the Enable switch to return to AP position 10 Analyze scan refer to user guide for Lateral analysis and close the screen 11 Click exit to close the Exit Analysis screen 12 Restar...

Страница 115: ...ssfully Calculated dialog box 13 At the Field Service Calibration dialog box click the Write button to write the values to ARRC TXT file Click the Continue button to return to the Discovery Main Menu...

Страница 116: ...plots refer to the Discovery User s Guide 3 5 11 Install Software Options Install configure and test all software options purchased by the customer as defined by the Sales Order except for the HL7 op...

Страница 117: ...Pattern Phantom P N 099 0715 should be aligned approxi mately an inch to the right of the Step Wedge Phantom 7 The x ray test pattern should be placed on the table with the lines the Test Pattern Phan...

Страница 118: ...nd working properly Finally clean the machine and remove any unwanted packing materials from the room 3 5 14 Measure X Ray Dose To Patient A radiation dose measurement must be performed at installatio...

Страница 119: ...59 Note If you cannot measure the scatter radiation at a distance of 2 meters because of space restrictions you can measure at 1 meter and divide the result by 4 This reading must be less than 10 Gy h...

Страница 120: ...6 From the Discovery Main Menu select QC QC Data Management Plot Use a start and end date that will only select the scans that you have just completed 7 Select QC Parameter to Plot HiA and Plot 8 Plot...

Страница 121: ...tening on page 3 55 Re run daily QC see the Discovery User s Guide Print a copy of the test results and inlcude it with the other paperwork being returned to Hologic After realignment repeat the Table...

Страница 122: ...te Archive the air scans you have acquired and either e mail or ship them to a Technical Support Specialist at Hologic headquarters for final evaluation Note If the customer is upgrading to the Body C...

Страница 123: ...the measurements are not within specification go to the Aligning Table section below 4 2 Align the Table After you have taken the measurements in the Checking Table Alignment section use the procedur...

Страница 124: ...e securely fastened to the upper and lower frames Note Even if the brackets are secured to the frames they may not be securely fastened to the pedestal If not remove the table to access the screws tha...

Страница 125: ...perform the following procedure 1 Remove the outer and inner covers from the left pedestal 2 Loosen the four bolts fastening the top of the pedestal and the four bolts fastening the bottom of the ped...

Страница 126: ...ent will directly affect the repeatability coefficient of variation or CV of the Discovery Therefore this alignment must be verified at the time of installation or whenever any work is performed that...

Страница 127: ...the alignment hole in the Filter Drum Assembly base plate and be perpendicular to the Aperture Plate If it is not per form steps 4 through 7 Otherwise proceed to step 8 A B D C Fixture C Arm Detector...

Страница 128: ...o see if the pin is perpendicular 7 Type exit Enter to return to the Discovery Main Screen 8 Start the X Ray Survey Utility by selecting Utilities Service Utilities X Ray Survey see X Ray Survey on pa...

Страница 129: ...page 9 1 for information on the utility 4 Set Hi gain to 2 Lo gain to 1 and X ray mode to 3 5 For Display click Graph 6 For Segment click Air 7 Click X ray F2 to turn on x rays The next 5 steps adjus...

Страница 130: ...ection until the trace drops off the signal on the end detectors of the array will drop off Then count the turns while moving it in the other direction until the trace falls off on the detector on the...

Страница 131: ...t X Ray Survey 24 Reboot the PC to return to the Discovery software 4 5 Aperture Calibration Note Aperture Calibration cannot be run on Ci and Wi This procedure locates the exact starting positions of...

Страница 132: ...tor you are calibrating 4 6 0 1 MOTOR TZ Discovery A and SL only 1 Select the TZ motor device driver by typing MOTOR TZ Enter 2 At the MOTOR TZ prompt type CALIBRATE Enter The program sends the calibr...

Страница 133: ...ry String Encoder See Adjustment on page 5 15 for details 7 Calibrate the TZ motor lower left and lower right encoder positions to a range of 250 300 and a difference of no more than 5 between the two...

Страница 134: ...3494 NegLimit PosLimit The encoder readings for the negative downward and positive upward mechanical stops In normal operation the TZ microprocessor uses the right pedestal readings for closed loop c...

Страница 135: ...tor to the left in one inch increments until the motor hits the left mechanical stop and then steps the AY motor to the right in one inch increments until the motor hits the right mechanical stop The...

Страница 136: ...the mechanical stops If these entries are not present or are zero the motion limits are set to the mechanical limits The program then changes the plot title to PRESS ANY KEY TO CONTINUE 7 Press the En...

Страница 137: ...AY PRO file Since these values are a property of the mechanical design of the system they should never change 4 5 209 61339 NumberOfTicks TickDistance The number of encoder ticks corresponding to the...

Страница 138: ...eadback is 3750 5 i e in the range 3745 3755 and then tighten the coupling setscrew 5 Repeat the calibration procedure above but now when TY hits the left mechani cal stop press Enter The program then...

Страница 139: ...right of the plot in the form Y Intercept Slope X The two slopes e g 86 5 and 85 6 should be within 0 3 of each other The program displays the positive and negative limits as horizontal dashed lines N...

Страница 140: ...DIS COVERY systems 3 Press Enter and the program prompts 4 The program moves the TX motor to the left When TX hits the left mechanical stop the first time press Esc 5 Check the position value It must...

Страница 141: ...the TxMotor section of the SQDRIVER INI file determine the motion limits relative to the mechanical stops If these entries are not present or are zero the motion limits are set to the mechanical limit...

Страница 142: ...e Con firm that the level is still at 0 0 degrees Adjust the leveling feet as necessary to obtain this result Failure to perform this step will result in positioning toler ance errors on whole body la...

Страница 143: ...Repeat the calibration procedure above but now when AY hits the left mechani cal stop press Enter Wait until the rotation completes and then repeat the calibration procedure above but now when the C a...

Страница 144: ...Discovery QDR Series Technical Manual 4 22...

Страница 145: ...rompts and moves the C arm back to the approximate 83 position The program then prompts 15 Place the digital level on top of the X ray tank assembly and use the Table IN OUT switch on the operator pan...

Страница 146: ...bort the calibration procedure When the calibration scan completes the program computes the linear fits to the positive and negative rotation The linear fit parameters are displayed at the top left an...

Страница 147: ...3 50771 5601 NumberOfSteps StepDistance The number of motors steps corresponding to the step distance in minutes of rotation The ratio of these two numbers determines the step size The calibration pro...

Страница 148: ...graphy and select AP Lumbar as the scan type DO NOT use the spine phantom biography as a patient Uncheck the Use Default Scan Mode check box and click Next Select Array Mode and click Next 3 Click the...

Страница 149: ...5 Set Pulse to 1 press ALT P 6 Set a Hi Gains to 2 b Lo Gains to 1 c X ray Mode to 3 d Aperture to 7 5 Press Enter 6 Display the X Ray Survey bar graph press Ctrl Page Down 7 Observe Hi Air press Alt...

Страница 150: ...on the C Arm Interface board a The yellow Index LED blinks on then off as the Index mark passes the optical interrupter b Verify the green Top of Drum and Brass on Top LED D8 blink as the drum spins...

Страница 151: ...nd and centered Some phantoms will have a target hole if not use a ruler If you are using a DXA Quality Control Phantom aluminum representation of vertebral bodies Part Number ASY 01564 place the phan...

Страница 152: ...nt This procedure verifies lateral alignment 1 On the control panel press Center to move the table and C Arm to the center position 2 On the control panel press Laser on the control panel to turn the...

Страница 153: ...f you are using an Anthropomorphic Spine Phantom looks like actual bones Part Number 030 1967 skip this step If you are using a DXA Quality Control Phantom does not look like actual bones Part Number...

Страница 154: ...Guide for instructions if necessary When done click Close 20 At the Exit Analysis screen select Report Print a report of the procedure just per formed and include the report in the paperwork being ret...

Страница 155: ...the Table Top Radiographic Uniformity test If the global S D is less than 2 0 print a copy of the test results and include it with the other paperwork being returned to Hologic If the global S D if e...

Страница 156: ...14 Area BMD and BMC Calibration Calibration for Area BMD and BMC is accomplished in 3 stages a Array Scan Thickness Measurement Calibration b Calibration of Area and BMC for Array Scan Modes c Adding...

Страница 157: ...lect the Spine Phantom and click the OK button at Patient Information dialog box 6 Select AP Lumbar Spine uncheck default scan check box and click the Next button 7 Select Array click the Next button...

Страница 158: ...table otherwise the test will have to be started over 4 Change the scan length to 6 inches and click start scan to begin the AP compo nent 5 When scan has finished select Spine as the analysis method...

Страница 159: ...yzed Scans and select the 19 scans click on Compare radio but ton and then click the next button 9 Now select the scan analyzed in step 6 and click the next button 10 The 19 scans will now be compared...

Страница 160: ...ain Menu select the QC QC Data Management Plot to create plots for BMD BMC AREA HiAir and LoAir plot for each array mode Verify that the QC plots inlcude QC scans from at least the last two years 6 En...

Страница 161: ...Center Positioning Control Panel PatientUnloadPos 500 Factory Patient Unload Position ScanPosTolerance 3175 Factory Tolerance for TZ AyMotor SpineInitPos 460000 Factory C Arm scan start position FlatP...

Страница 162: ...ze 0 2 510 0 04 Factory Size 1 2 510 0 04 Factory Size 2 2 510 0 04 Factory Size 3 2 510 0 04 Factory Size 4 2 510 0 04 Factory Size 5 2 510 0 04 Factory Size 6 2 400 0 04 Factory Size 7 2 400 0 02 Fa...

Страница 163: ...otOff 6 2124 Factory SlotOff 7 2124 Factory SlotOff 8 1514 Factory SlotOff 9 1514 Factory SlotOff 10 879 Factory SlotOff 11 879 Factory SlotOff 12 174 Factory SlotOff 13 174 Factory Attenuator Toleran...

Страница 164: ...rrection It can be set to one of four possible values 0 1 2 or 3 but should always be set to 0 Q4 0 651 1 013 1 461 Factory These numbers are used for all array modes The numbers are determined by mea...

Страница 165: ...ables Set by Descriptions T0_NL 6 00 Factory Width of the phantom shipped with the discovery This value is the same for all phantoms HIA_NL 0 00 Automatic Hi Air Lateral LOA_NL 0 00 Automatic Lo Air L...

Страница 166: ...or F S Area Correction Factor for Turbo scans BCFT 1 005450 Fact or F S Bone Correction Factor for Turbo scans SFFT 1 083600 1 095000 Factory Spine Fan Factors Turbo mode correction factors HFFT 1 04...

Страница 167: ...f the FRUs in the Electronics Tray assembly remove the 6 Phillips retaining screws and remove the cover Next remove the nut that holds the ground wire to the cover ground lug Tool Size Type Hex driver...

Страница 168: ...ug the cables on the board to be replaced 4 To remove the board unscrew the Phillips screws holding the board Note Some boards have standoffs and or plastic hold down snaps 5 To replace the board reve...

Страница 169: ...t down the computer and then turn off the main circuit breaker on the foot end pedestal 3 At the encoder end of the belt loosen the 2 bolts holding the tension block remove the tensioning nut and remo...

Страница 170: ...ng hardware holding the encoder to the belt drive 6 Remove the encoder from the bracket assembly 7 Replace the encoder on the bracket install the coupling but do not tighten the screws 8 Restore power...

Страница 171: ...ve the panel 4 To replace the Control Panel reverse the steps 5 3 2 PCBs Under Right Side of the Table To remove and replace the boards under the table TY Motor Controller Board or Control Panel Contr...

Страница 172: ...they are not interchangeable 4 Pull the tabletop to the right far enough to remove the left table rail end cover and remove the cover Mark this as the left cover so that it is not confused later with...

Страница 173: ...bly making sure to align the gasket cor rectly Snug the Allen bolts but don t over tighten 7 Install the belt on both pulleys 8 At the encoder end of the belt install the tension spring and tensioning...

Страница 174: ...they are not interchangeable 5 Unplug the encoder from the Motor Controller Board and pull out the cable 6 Remove the coupling holding the encoder to the belt drive 7 Remove the encoder from the brac...

Страница 175: ...s screws from the upper pedestal cover and remove the cover 3 Shut down the computer and then turn off the main circuit breaker on the foot end pedestal 4 Unplug the cables on the TX Motor Controller...

Страница 176: ...sion block remove the tensioning nut and remove and replace the belt 7 Install the tension spring and tensioning nut 8 Tighten the tension nut so that the spring is compressed to 7 8 inch The bracket...

Страница 177: ...le Drive Assembly refer to Figure 5 4 and follow the procedure below 1 Before removing power from the Discovery move the table to the far left using the Motor Control Pad The Motor Control Pad can be...

Страница 178: ...n describes how to remove and replace the FRUs associated with Table Z up and down motion of the Discovery see Figure 5 5 Figure 5 5 Table Z FRUs 5 5 1 Pedestal To remove and replace either pedestal r...

Страница 179: ...on the tank to support the table Place foam padding between the 2 x 4s and the table to protect the tape safety switch 6 Push in the Emergency Stop switch 7 On the TZ Motor Controller board set the No...

Страница 180: ...st be 65 inches at both the front and back If it is not move the pedestal until the measure ments are correct 20 Tighten the lower and upper pedestal bolts 21 On the TZ Motor Controller board set the...

Страница 181: ...ust sit on the top surface of the base frame before tightening 10 Replace the linear encoder top screw by extending the string and fastening to the top using screw and washers provided 11 Turn on the...

Страница 182: ...e Encoder Position count value equals the Upper Left count value half of the lower count difference Secure the three adjustment screws on the face of the encoder Return to Step 2 of the MOTOR TZ calib...

Страница 183: ...screws 2 Shut down the computer and then turn off the main circuit breaker on the foot end pedestal 3 Remove the lower C arm cover then remove the rear tank cover covers the C arm Interface board 4 U...

Страница 184: ...t Scan Modes on page 3 64 5 6 3 Filter Drum Assembly To remove and replace the Filter Drum Assembly refer to Figure 5 7 and do the following 1 Using the Control Panel move the table in as far as it wi...

Страница 185: ...move and replace the Tank Assembly refer to Figure 5 7 and Figure 5 8 and follow the procedure below 1 Using the Control Panel move the table in as far as it will go for easier access 2 Start the X Ra...

Страница 186: ...the new tank see Figure 5 8 13 Remove the Filter Drum support brackets from the old tank and install on the new tank see Figure 5 8 14 Slide the tank tray with tank installed back in place in the C a...

Страница 187: ...n describes how to remove and replace the Arm R Rotate FRUs located on the right side of the lower C arm see Figure 5 9 and Figure 5 8 Before removing power from the Discovery move the C arm towards t...

Страница 188: ...Discovery QDR Series Technical Manual 5 22...

Страница 189: ...board ensure that the ID switch is set to 6 5 6 7 Arm R Belt To remove and replace the Arm R Belt refer to Figure 5 9 and Figure 5 10 and follow the procedure below 1 Shut down the computer and then t...

Страница 190: ...cket 2 bolts while leaving the belt attached This provides enough slack to remove the belt from the motor pulleys 4 Remove the belt from the motor pulleys Access the pulleys from the left side of the...

Страница 191: ...and replace either Gas Spring Refer to Figure 5 9 and follow the procedure below 1 Using Emergency Motion rotate the C Arm to the Lateral position 2 Remove the retaining clip from the top of the gas...

Страница 192: ...tector assembly using the screws and cables removed in the previous step 4 Turn on the Discovery power boot the computer and login as Service 5 Perform the X Ray Beam Alignment procedure on page 4 4 6...

Страница 193: ...tor Assembly To remove the 010 1653 Detector Assembly refer to Figure 5 12 and follow the procedure below 1 Shut down the computer and then turn off the main circuit breaker on the foot end pedestal 2...

Страница 194: ...5 Turn on the Discovery power boot the computer and login as Service 6 Perform X Ray Beam Alignment on page 4 4 7 Perform A D Gain Control Adjustment on page 4 26 8 Perform Laser Positioning Offset Ad...

Страница 195: ...tector Assembly 4 Remove the 4 bolts holding the Detector Assembly on rubber grommets to the C arm see Figure 5 11 5 Remove the Detector Assembly 6 To replace the laser only loosen the laser clamping...

Страница 196: ...hut down the computer and then turn off the main circuit breaker on the foot end pedestal 3 Remove the C arm covers 4 Unplug the cables on the ADC board 5 Remove 4 Phillips screws and remove the ADC b...

Страница 197: ...edestal 2 Unplug the motor cable 3 Remove the 2 Phillips screws from the motor shaft bracket 4 Remove the motor mount 2 Phillips screws and remove the motor assembly 5 Remove the motor from the motor...

Страница 198: ...d replace the Aperture Position Belt 255 0032 refer to Figure 5 16 below 1 Shut down the computer and then turn off the main circuit breaker on the foot end pedestal 2 Loosen the 2 belt tension nuts a...

Страница 199: ...reaker on the foot end pedestal 2 Remove the Aperture Position Belt refer to the procedure above 3 Remove the potentiometer pulley 4 Remove and replace the potentiometer face wires towards the Apertur...

Страница 200: ...ion describes how to remove and replace the FRUs on the Drum Assembly 5 9 1 Drum Encoder PCB To remove and replace the Drum Encoder PCB 140 0089 refer to Figure 5 16 Figure 5 17 and Figure 5 18 and fo...

Страница 201: ...to BRASS test point TP2 on the C Arm Interface board 7 Connect probe to ground 8 Go to X Ray Survey and turn on the Filter Drum motor 9 As the filter drum motor turns on and rotates look on the C Arm...

Страница 202: ...ng If necessary readjust the timing The LOC LED must be solid on and steady 12 Replace the Aperture Assembly 5 9 2 Drum Belts To remove and replace either Drum Belt 130 teeth or 150 teeth refer to Fig...

Страница 203: ...he idler is spring loaded to seek proper tension 9 Tighten the outer pulley set screw 10 Remove the Filter Drum Alignment Pin 11 Pull the Emergency Stop button 5 9 3 Stepper Motor Assembly To remove a...

Страница 204: ...ure assembly and drum belts see procedures above 2 Remove the 2 drum motor mount screws see Figure 5 18 Stepper Motor Assembly 010 0627 Belt 150 Teeth Belt 130 Teeth 255 0030 255 0031 Drum Motor Mount...

Страница 205: ...for PCB is facing the C cutout of the base plate Replace the 4 flat washers split locks and 4 40 x 3 8 screws that secure the endplates 14 Insert the Drum Spacing Fixture 099 0296 between the endcap...

Страница 206: ...nd connection usually to the ground plane of the PCB at that end Use a star washer between the ground lug and the ground plane Be sure the ground lug does not short out any component on the PCB When d...

Страница 207: ...de the information necessary to identify and order the correct FRU Please note The tables are listed by Figure and then by Cable Miscellaneous Mobile and then Special Tools The Used On column indicate...

Страница 208: ...elt All 310 0006 Circuit Breaker 7 5 Amp All 310 0053 Circuit Breaker 15 Amp All 310 0018 Circuit Breaker 20 Amp All 310 0014 Fuse 10 Amp All 310 0044 Fuse 6 Amp All 310 0086 Fuse 8 Amp All 325 0004 G...

Страница 209: ...30 3127 Control Panel Discovery 9 Button A and SL 465 0042 Switch Pushbutton w LED Pnl All 465 0043 Switch Emergency Stop Anti Rotate All ASY 01374 128 Channel Assy 56303 C W SL 010 1606 Assy Discover...

Страница 210: ...etwork Card PCI Communication Command Board All 140 0124 PCI Communications Controller PCB All 180 0136 SCSI Cable Internal All 129 0159 MODEM PCI All Part Number Description Used On 140 0068 Aperture...

Страница 211: ...Power All 180 0422 Cable Table XX Drive C and W 180 0532 Cable Table X Drive A and SL 180 0423 Cable Arm YY Drive C and W 180 0426 Cable Table YY Drive W 189 0543 Cable Arm YY Drive A and SL 180 0530...

Страница 212: ...ILE C W Part Number Description Used On 099 0110 Filter Drum Alignment Pin All 099 0111 Aperture Alignment Pin All 099 0145 Aperture Alignment Block All 099 0264 Communications Controller Board Loopba...

Страница 213: ...level of 12 0 6 3 Hardware Configuration When troubleshooting it is sometimes helpful to observe the indicators available on the PCBs and other FRUs Many components of the system have LEDs indicating...

Страница 214: ...Check AC input voltage Power cable to the Torroid Assembly Power Module heading Section 2 Suspected Power Module problem Check AC Voltage at Scanner DIN Rail Power Module FRU s heading Section 5 Susp...

Страница 215: ...1 Figure 5 2 Driver Board Figure 5 1 Figure 5 1 Figure 5 1 Encoder Figure 5 1 Motor Controller Board Figure 5 1 FigureFigure 5 2 5 2 Distribution Board Figure 5 1 Operator Control Panel Figure 5 2 Co...

Страница 216: ...er installation This may cause problems if reversed Left 030 1376 right 030 1838 CAUTION Running any motor subsystem to its limit in either direction does not damage the motor However if the motor enc...

Страница 217: ...stions apply to a Discovery system that exhibits a vertical stripe in the display Component See Detector Boards Figure 5 11 Aperture Assembly C Arm Interface Board Figure 5 7 Filter Drum Assembly Filt...

Страница 218: ...isplay Check Refer to Line voltage Power ground see Check Tube kV Peak Potential on page 3 28 Tube kV Peak Potential see Check Tube kV Peak Potential on page 3 28 Tube Current see Check Tube Current o...

Страница 219: ...age 3 30 X ray beam alignment see X Ray Beam Alignment on page 4 4 Signal strength and noise see X Ray Survey on page 9 1 Aperture position and aperture belt see Aperture Calibration on page 4 9 Filte...

Страница 220: ...lso Run the hardware checker see SQVERIFY on page 9 10 If Check Refer to Object being scanned appears Detector array It may be too far forward or back inside the upper arm assembly Figure 5 11 to the...

Страница 221: ...and within specs Check X Ray Survey bar graph for shifting or dancing X rays If so test X Ray Controller Check A C line for stability voltage and frequency Page 3 30 Page 4 4 Mechanical frame problems...

Страница 222: ...n the aperture plate Check the aperture assembly encoder s belt tension Tension should be set to 2 5 lbs If the belt is too tight it may cause encoder readback errors and cause the calibration program...

Страница 223: ...to Shutter is open and not obstructing the beam Page 5 29 Figure 5 14 Motor drives have been calibrated Pages 3 33 to 3 42 If Suggestions Laser does not turn on Software is inhibiting laser when tabl...

Страница 224: ...s of the seals Laser crosshair beam is defective Check laser block assembly mirrors for breaks cracks or misalignment Check that shutter is open Check that aperture is unobstructed Loosen the securing...

Страница 225: ...t Screws Using the torque settings in the table above and referring to the figure below tighten the Bladder Gasket screws as follows 1 Tighten screw 1 then 2 then 3 and then 4 2 After screw 4 continue...

Страница 226: ...e 6 5 Transformer Screws 6 15 6 Tightening the Tank Cover Gasket Screws Refer to the figure below and the torque settings in the table above and tighten the Tank Cover Gasket screws as follows 1 Tight...

Страница 227: ...over Gasket 6 16 Miscellaneous Problems Problem Symptom Solution Detector X Ray Survey bar graph is ramped or it appears as 3 or 4 separate ramped sections Replace the Detector Assembly X ray lamp Tur...

Страница 228: ...Discovery QDR Series Technical Manual 6 16...

Страница 229: ...orm an Archive of all scans and a System Backup Exit QDR without shutdown then delete all temporary files tmp on the hard drive In the QDR software run RECONCILE to compact the database Check the QC d...

Страница 230: ...ion table motion and X ray production X ray production should be monitored by a Victoreen 450P or equivalent Note The front table tape switch is disabled until the C arm is at 0 so this switch should...

Страница 231: ...Bearing Maintenance On all Discovery models a guide rail and two guide bearings AY are located at the lower back of the C arm Another guide rail and two guide bearings TX are located on the right sid...

Страница 232: ...ge between one and two years The following table lists more information about the grease to be used Consult Hologic Field Service for more information on obtaining the proper tools material and proced...

Страница 233: ...w Voltage Power Supply CB Drive Normall y D10 On 15VDC Int Low Voltage Power Supply 1 TZ In A SL 24VDC Int Low Voltage Power Supply 2 TY In D112 Off TY DRIVE 3 TX In D122 Off TX DRIVE 4 AR In A SL D13...

Страница 234: ...ged STEP Off Set to Stepper motor AR SW1 6 Figure 5 9 Stepper motor AY SW1 7 Figure 5 1 Stepper motor TX SW1 4 Figure 5 3 Stepper motor TY SW1 5 Figure 5 2 TZ Drive A and SL Only LEDs Voltage Signal S...

Страница 235: ...4 Page 4 26 Detector Array Assembly A Model only Source Source Refer To 15VDC Ext ADC PCB 15VDC Ext ADC PCB Figure 5 8 5VDC Ext ADC PCB 12VDC Int Voltage Reg 12VDC Int Voltage Reg ADC A Model only LED...

Страница 236: ...MAIN Out D6 On 5VDC Int Voltage Reg W1 W2 NORMAL 1 2 TEST 2 3 In 7VDC Int Voltage Reg W3 SYS RESET In 15VDC Ext Signal Dist W4 TEST MODE Out 15VDC Ext Signal Dist W5 Safety switches In Drum JP15 Redu...

Страница 237: ...ay generation and detection for the system This utility is used by Hologic manufacturing and service engineers only 9 1 1 Invoking X Ray Survey 1 Log on as the Field Service and start the QDR Software...

Страница 238: ...hen the Graph button is active and the system is producing X Rays the data is presented in a bar graph see Figure 9 3 Scale markings on the bottom of the graph indicate detector numbers Scale markings...

Страница 239: ...pose this will always be Volts The display has a vertical scroll bar on the right because only a sixth of the data for all of the detectors is showing at one time Figure 9 4 X Ray Data as a Raw Data 9...

Страница 240: ...default for this button is OFF The Field Engineer will not use the Filter Wheel button and it should always remain OFF This deals with testing the system in different mode 9 1 3 2 3 HI LO buttons The...

Страница 241: ...ing with Test Signals These controls include 9 1 3 3 1 Test Signal button OFF ON The default setting of this button is OFF When this button is ON a test signal is sent to all of the detectors Activity...

Страница 242: ...re shown in the above table 9 1 3 3 6 Xray Mode This is a spinner control with a range of 0 to 8 The default mode is 3 This control determines the voltage current and duty cycle for the x ray generato...

Страница 243: ...reen tinted voltages In TABLE the Main Display shows the data from the detectors as numeric data 9 1 3 4 2 Scale This has three buttons RAW LOG and VOLTS The Default is VOLTS The Field Engineer will n...

Страница 244: ...ixteen bit numbers traveling through some parts of the hardware on sixteen separate wires The Status Bits field displays the most recent value for each bit and color codes whether that bit has ever ch...

Страница 245: ...values used to calculate the mean and standard deviation for each of the six filter segments The pop up window can be dragged wherever the user wants and remains until Show Details is actively releas...

Страница 246: ...ents Refer to the SQCHECK User Manual 080 0707 for detailed explanations of its use 9 4 SQKEYPAD The SQKEYPAD program is accessed from the Discovery Main Menu by selecting Utilities Emergency Motion T...

Страница 247: ...in this section may indicate a hardware or software error For hardware errors a suggested action is provided In most cases software errors are software checks that are used during the software develop...

Страница 248: ......

Страница 249: ...COLLISION_IMMINENT_I Comment The C C has calculated that the C arm and table are within 1 4 Action If the C arm and table are really within this distance the problem is with the application or operato...

Страница 250: ...f the problem persists place all devices in emulation mode e g by turning off instrument power and booting in the workstation mode Disconnect all devices except the C arm from the communications link...

Страница 251: ...entered or edited Action Check that the hard drive is not full That is check the message Room for __ scans in the status window and ensure that it does not say zero If it is full then archive and dele...

Страница 252: ...attempted to control the laser positioning light when it was under local control or an application attempted to turn on the laser while the C arm and table were within the laser safety distance of ea...

Страница 253: ...is less than or zero Action Verify that the system has been properly calibrated and the normal Hologic system startup procedure has been followed i e reboot the machine and if the problem persists rec...

Страница 254: ...or for any move command until valid calibration information has been downloaded Reported as command error for any IS_xxx command executed from an application as opposed to executing from a state machi...

Страница 255: ...er Windows This may also be due to a communications error between the AT and the C arm Follow the procedure under BAD CHECKSUM IN MESSAGE to diagnose I O errors Emergency stop active E_EMERGENCY_STOP_...

Страница 256: ...y a colon Drive A is diskette C is hard drive and D is the optical Check for disk full For diskette simply try a different diskette and see if the problem goes away For hard drive check the Room for _...

Страница 257: ...to Hologic Technical Support Include as much information as possible about what you were doing at the time flattening records are not initialized Action Disk error or missing software Check operation...

Страница 258: ...mation as possible about what you were doing at the time Internal Buffer Size Exceeded Software This message should be reported to Hologic Technical Support Include as much information as possible abo...

Страница 259: ...BAD CHECKSUM IN MESSAGE to diagnose I O errors Comment If reported as the abort code for the state machine it indicates that the internal driver event queue was full when the state machine attempted...

Страница 260: ...cause is that the signal for one or more of the detectors is higher than allowed Action One or more detectors is bad See instructions for running hardware checking program Invalid identification file...

Страница 261: ...g do not run a scan while connected to a network or attempt to run a scan under Windows Otherwise report this error to Hologic Technical Support Motor_xx Comment For a stepper motor the application at...

Страница 262: ...e when a protocol is aborted to start the local motion state machine Action When moving the system using the operator control panel wait until all motion stops before starting an application that requ...

Страница 263: ...it reports no errors then proceed to take each one of the other devices out of emulation mode until the one in error is found Also see the discussion under BAD CHECKSUM IN MESSAGE for diagnosing I O...

Страница 264: ...E_LIMIT_POSITION_I Comment An application tried to move the motor beyond the limit position i e the motor need not necessarily be at a limit Action Be sure that the table and C arm are at the correct...

Страница 265: ...irmware reports a pedestal timeout during a move command Action See the discussion of the TZ drive s E_TOLERANCE_I error No data for attenuation curves Software This message should be reported to Holo...

Страница 266: ...unications bus Follow the procedure under BAD CHECKSUM IN MESSAGE for isolating I O errors Patient File Record __ Too Small Patient File Record __ Too Large Hardware or Software These messages indicat...

Страница 267: ...ed to Hologic Technical Support Include as much information as possible about what you were doing at the time Starting phase Out of Range Software This message should be reported to Hologic Technical...

Страница 268: ...Action Report this error to Hologic Technical Support Include as much information as possible about what you were doing at the time Refer to the NO A C Line Interrupts message at start up on page 6 9...

Страница 269: ...mat diskette Hardware or Software This usually means that you attempted to format a diskette that was defective Action Try a different diskette If this message occurs repeatedly and with more than one...

Страница 270: ...ead Previous Analysis Results Unable to Rewind Q File Unable to Rewind File ________ Unable to Read BMD Image Frame Unable to Read HALO Frame Header Unable to Read Q Data File Unable to Write to Q Ima...

Страница 271: ...For one of the stepping motors AR AY TX or TY either the motor has not been properly calibrated the motor is binding or the drive belt is too loose Action For the aperture shuttle LOCUS CARM either t...

Страница 272: ...tion Report this error to Hologic Technical Support Include as much information as possible about what you were doing at the time Unsolicited message from C C E_UNSOLICITED_MESSAGE_I Action Report thi...

Страница 273: ...the actual pulse level does not match the template for the given X ray mode it generates this error Action If the filter drum and X ray generator are out of sync it is often difficult to determine wh...

Страница 274: ...that the filter drum wheel readback did not match the expected value i e there must be six segment readbacks there must be eight pulses within each segment and the first four pulses in each segment a...

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