Chattanooga Group 2738, Service Manual

Page: 23 / 53

20
Intelect Transport® Combo Therapy System
5.8 INTERFERENTIAL MODE TEST
It is assumed that the unit is ready for tests as
described in 5.7 parts A and B . If not, set up unit
per 5.6 parts A and B prior to performing tests.
A. Interferential Mode Test Procedures
1. Set Scope; Time- 100 μS, Channel- 20 V, and
Trigger- DC.
2. Highlight Stim Channel 1. Press the Enter
button.
3. Highlight IFC. Press the Enter button.
4. Increase Intensity until 50 is displayed.
5. Press START button.
6. Compare waveform on scope to Figure 5.5.
7. Press PAUSE button.
8. Verify that the amplitude displayed below
timer drops to zero (0).
9. Verify that Paused is displayed below the
displayed amplitude.
10. Press STOP button.
B. Interferential Mode Test Results
1. Waveform is the same between scope and
Figure 5.5 , amplitude dropped to zero
when paused and “Paused” displayed
below timer.
Unit passed test.
2. No waveform or considerably different
waveform.
Unit failed test. Replace appropriate Stim
Board.
3. Amplitude failed to “zero” when paused.
Unit failed test. Replace appropriate Stim
Board.
4. “Paused” did not display when unit paused.
Unit failed test. Replace appropriate Stim
Board.
5.9 PREMODULATED MODE TEST
Set up System per 5.7 parts A and B prior to
performing test.
A. Premodulated Mode Test Procedures
1. Set Scope; Time- 2.50 mS, Channel- 20 V, and
Trigger- DC
2. Highlight Stim Channel 1. Press the Enter
button.
3. Highlight Premod. Press the Enter button.
4. Increase Intensity until 50 is displayed.
5. Press START button.
6. Compare waveform on scope to Figure 5.6.
7. Press STOP button.
8. Highlight Channel 2 and repeat steps 3
through 7.
B. Premodulated Mode Test Results
1. Waveform is the same between scope and
Figure 5.6.
Unit passed test.
FIGURE 5.5
FIGURE 5.6
5 TROUBLESHOOTING