Discovery QDR Series Technical Manual
vi Table of Contents
4.6 Motor Calibration ............................................................................................ 4-10
4.7 Laser Positioning Offset Adjustment ............................................................... 4-26
4.8 A/D Gain Control Adjustment ......................................................................... 4-26
4.8.1 Check and Verify the A/D Gain ............................................................. 4-27
4.8.2 Adjust the A/D Gain ............................................................................... 4-27
4.9 Filter Drum Encoder Alignment ...................................................................... 4-28
4.10 Detector Flattening ....................................................................................... 4-29
4.11 Lateral Alignment Test (QDR 4500A and SL) .............................................. 4-30
4.12 Table Top Radiographic Uniformity ............................................................. 4-32
4.12.1 Instruments using Body Composition Analysis (BCA) ........................ 4-33
4.12.2 Instruments using BMD Whole Body Analysis ................................... 4-33
4.13 Check Phantom values ................................................................................... 4-34
4.14 Area, BMD, and BMC Calibration ................................................................ 4-34
4.14.1 Scan Thickness Measurement & Calibration (C and W) ...................... 4-35
4.14.2 Scan 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 REPLACE PROCEDURES
5.1 Recommended Tools ......................................................................................... 5-1
5.2 Electronics Tray FRUS ...................................................................................... 5-1
5.2.1 Electronics Tray Printed Circuit Boards ................................................... 5-2
5.2.2 C-Arm Y Motor or Gearcase .................................................................... 5-3
5.2.3 C-Arm Y Encoder ..................................................................................... 5-4
5.3 Table Y FRUs (A, W and Wi Only) .................................................................. 5-4
5.3.1 Control Panel (All models) ....................................................................... 5-5
5.3.2 PCBs Under Right-Side of the Table ........................................................ 5-5
5.3.3 Table Y Belt .............................................................................................. 5-6
5.3.4 Table Y Motor or Gearcase ...................................................................... 5-7
5.3.5 Table Y Encoder ....................................................................................... 5-7
5.4 Table X FRUS ................................................................................................... 5-8
5.4.1 Table X Motor Controller PCB ................................................................ 5-9
5.4.2 Table X Belt ............................................................................................ 5-10
5.4.3 Table X Motor or Gearcase .................................................................... 5-10
5.4.4 Table X Encoder ..................................................................................... 5-11
5.5 Table Z FRUs (A and SL only) ...................................................................... 5-12
5.5.1 Pedestal ................................................................................................... 5-12
5.5.2 The Linear Rotary String (Encoder) ....................................................... 5-14
5.6 Lower C-Arm FRUS ........................................................................................ 5-16
To Next Page
Loading...
