GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card PM A201 - Gantry operational checks
Page no. 1777
Chapter 11
JC-PM-A-201.fm
Job Card PM A201 - Gantry operational checks
Chapter 11
1
SUPPLIES
None
2
TOOLS
•
Mammography compression scale with digital display
•
3
REQUIRED EFFORT
Personnel: 1 Field Engineer
Time: 10 minutes
4
SAFETY PRECAUTIONS
WARNING
Before beginning work on the lift mechanism, shut down the equipment and switch OFF
the Senographe hospital supply circuit breaker. Lock it in the OFF position or mark it
clearly with a warning sign to prevent others from applying power.
•
NEVER switch off at the UPS except in emergency (risk of data loss).
5
PREREQUISITES
None
6
PROCEDURE
6-1
Check lift movement
1. With the compression paddle out of compression, check that all four sets of lift up/down control but-
tons are operational (check each button for up and down movement of lift).
2. Move arm to its upper and lower limits. Software limits should stop movement. If the software limits
fail, optical sensors 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 should
be 8 ±2 seconds.
3. Lift movement should be smooth and progressive; check for any noise which might indicate exces-
sive friction or binding.
6-2
Check Arm Rotation
1. With the compression paddle out of compression, check that all four arm rotation control buttons are
operational.
For each button, check that light or firm pressure gives the correct rotation, and that rotation stops
when the pressure is released. Refer to
Job Card ELE A015 - Gantry Functional Checks
, for a full list of these checks.
2. Rotate the arm through its full range of +185°/-165°. Check in several positions that the electrical
braking is functioning correctly, by pulling on the handles.
