GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A015 - Gantry Functional Checks
Page no. 579 Chapter 7
JC-ELE-A-015.fm
Job Card ELE A015 - Gantry Functional Checks Chapter 7
1SUPPLIES
None
2TOOLS
• Mammography compression scale with digital display
• Set of acrylic plates
3 REQUIRED EFFORT
Personnel: 1 Field Engineer
Time: 10 minutes for breast thickness measurement, 17 minutes for others.
4 SAFETY PRECAUTIONS
The procedures in this Job Card produce X-rays. Ensure that you take appropriate precautions when
operating with X-rays (for example, stay behind the radiation screen during an X-ray exposure).
5 PREREQUISITES
None
6 GANTRY TESTING
You must check the basic functions of the Gantry.
During each power-up sequence, the software tests the following functions:
- Filter holder rotation
- Lateral, front, and rear collimator blade movement
- X-ray tube housing movement
- Compression paddle movement to home position
- Column movement limit stops
- Coherency between focal spot size, magnification, and X-ray tube housing angulation
- Grid movement
- Generator-Gantry communications link
- Gantry CPU board
6-1 Check Gantry Readout
Immediately following the power-up sequence, the Gantry readout must indicate the X-ray format.
6-2 Check Column Movement
1. With the compression paddle out of compression, check that all four sets of column up/down control
buttons are operational. Check each button for up and down movement of the column.
2. Move the column to its upper and lower limits. Software limits must stop movement. If software limits
have failed, the optical forks are used to recognize and stop any movement before impact with
mechanical stops.Total one-way movement time (going either up or down) between upper and lower
limits must be 8 ±2 seconds.
3. Movement must be smooth and progressive; check for any noise which can indicate excessive fric-
tion or binding.
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