Hologic QDR 4500 - Page 6

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APERTURE CALIBRATION (A and SL only) ........................................................................................................4-9
MOTOR CALIBRATION .........................................................................................................................................4-9
MOTOR$TZ (QDR 4500A and SL) ...................................................................................................................4-10
MOTOR$AY (all QDR 4500 models) ................................................................................................................4-12
MOTOR$TY (QDR 4500A and W)....................................................................................................................4-16
MOTOR$TX (all QDR 4500 models).................................................................................................................4-19
MOTOR$AR (QDR 4500A and SL)...................................................................................................................4-22
LASER POSITIONING OFFSET ADJUSTMENT.................................................................................................4-27
A/D GAIN CONTROL ADJUSTMENT .................................................................................................................4-27
BEAM FLATTENING............................................................................................................................................4-28
X-RAY BEAM ALIGNMENT "AIRSCAN" TEST...............................................................................................4-30
Machines using Body Composition Analysis (BCA)..........................................................................................4-31
Machines using BMD Whole Body Analysis......................................................................................................4-31
LATERAL ALIGNMENT TEST (QDR 4500A AND SL)......................................................................................4-31
AREA, BMD AND BMC CALIBRATION.............................................................................................................4-33
Scan Thickness Measurement & Calibration (QDR 4500A and SL)..................................................................4-33
Scan Thickness Measurement & Calibration (QDR 4500W and C)....................................................................4-36
Calibration of Area and BMC, for Array Scan Modes ........................................................................................4-38
Adding Array AP Scans to the QC Database.......................................................................................................4-39
SECTION 5 REMOVE AND REPLACE PROCEDURES............................................................5-1
RECOMMENDED TOOLS ......................................................................................................................................5-1
ELECTRONICS TRAY FRUS..................................................................................................................................5-1
Electronics Tray Printed Circuit Boards................................................................................................................5-1
C-Arm Y Belt........................................................................................................................................................5-2
C-Arm Y Motor or Gearcase.................................................................................................................................5-3
C-Arm Y Encoder .................................................................................................................................................5-4
CONTROL PANEL AND TABLE Y FRUS.............................................................................................................5-4
Control Panel.........................................................................................................................................................5-5
PCBs Under Right-Side of the Table ....................................................................................................................5-5
Table Y Belt..........................................................................................................................................................5-6
Table Y Motor or Gearcase ...................................................................................................................................5-6
Table Y Encoder....................................................................................................................................................5-7
TABLE X FRUS........................................................................................................................................................5-8
Table X Motor Controller PCB.............................................................................................................................5-8
Table X Belt..........................................................................................................................................................5-9
Table X Motor or Gearcase.................................................................................................................................5-10
Table X Encoder .................................................................................................................................................5-10
TABLE Z FRUS (A and SL only) ...........................................................................................................................5-11
Pedestal ...............................................................................................................................................................5-11
Linear Potentiometer (Encoder- Obsolete)..........................................................................................................5-13
The Linear Rotary String (Encoder)....................................................................................................................5-13
Installation ......................................................................................................................................................5-13
ARM R FRUS .........................................................................................................................................................5-15
Motor Controller Board.......................................................................................................................................5-15
Arm R Belt ..........................................................................................................................................................5-16
Arm R Motor, Gearcase, Encoder or Encoder Belt.............................................................................................5-16
Gas Spring...........................................................................................................................................................5-18
LOWER C-ARM FRUS ..........................................................................................................................................5-18
C-Arm Interface Board........................................................................................................................................5-18
X-Ray Controller Assembly................................................................................................................................5-18
Filter Drum Assembly.........................................................................................................................................5-20
Tank Assembly....................................................................................................................................................5-21
UPPER C-ARM FRUS............................................................................................................................................5-23
Integrator/Multiplexor Board..............................................................................................................................5-23
Detector Boards...................................................................................................................................................5-24
Laser Assembly...................................................................................................................................................5-25
REAR C-ARM FRUS..............................................................................................................................................5-26