GE FK000040, Руководство по обслуживанию

Страница: 263 / 598

GE M
EDICAL
S
YSTEMS
D
IRECTION
FK091075, R
EVISION
04 V
IVID
3N P
RO
/E
XPERT
S
ERVICE
M
ANUAL
Chapter 7 Diagnostics/Troubleshooting 7-25
7-3-7 Beamformer (BF) Diagnostic Tests (cont’d)
9) Under Auto Detect , click the Start button. Checking of the test results commences and the light
adjacent to the button flashes green and continues to flash while Auto Detect is in progress. If a fault
is detected, the flashing light changes to red and an error log is displayed listing the channel/s on
which the test failed.
Alternatively, review the information manually, using the scroll arrows on the right of the Ultrasound
Scope window to select a vector between 0 and 63. The selected vector is displayed in the Vector
# field and its test results are displayed in the Spectrum area.
Check the test results for each vector, as follows:
• Verify that the RMS level displayed in the RMS field is above 70.
• Verify that the amplitude at frequency 2.5 is within a range of -5 to -20.
• Verify that the amplitude at frequency 5 is below -50.
• Verify that the amplitude at frequency 7.5 is below -60.
NOTE: If the RMS level is above or below the specified level, reboot the system, perform calibration
and repeat the test.
10) Proceed as follows:
• If no problems were identified, proceed to the FB tests, as described in 7-3-8 "Front Board
Assembly (FB) Diagnostic Tests" on page 7-26 .
• If no problems were identified but the problem persists, contact your local GE Medical Systems
field engineer for assistance.
• If errors were identified but the results were marginal, perform calibration, as described in
Section 6-8 "Calibration" on page 6-21 , and then repeat the test.
• If errors were identified and the results were not marginal, verify that all image port and PCI
bridge cables are connected and functioning properly, as described in Chapter 5 - Components
and Function (Theory) . If the problem persists, contact your local GE Medical Systems field
engineer for assistance.
11) When finished, trackball to the Cancel button and press Select . The FE Diagnostics dialog box is
re-displayed.