Short to
ground, signal noise from any source at tube housing thermal switch
signal EZX3 / EWGX8 / EWGX9
- pins 3-4 backpanel version 4512 108 05983
- pins 6-7 backpanel versions 4512 108 05984 + 4512 108 09361
Remove cable connection and insert a decade plug with a short link
pins 3-4 or 6-7 instead to simulate the tube housing contact, see
if problem disappears, if not measure signal TH_OL_SW/
at EZ130 X1:A11
Short to ground at signal TH_OL EZ130 X1:A12.
This signal is not used in any system as a thermal tube sensor is
not available yet.
This problem might be caused by a non-screened stator & thermal
switch cables.
- 0722-215-02054 (3 x 1.31mm screened stator cable)
- 4512-100-66151 (2 wire screened cable for thermal switch)
With a PC and XRGSCOPE:
go path >Select Unit > FU-kV > FU-kV > Faultfind >
Monitoring > Measure Temperatures >
tube temp switch:
should be closed = ok
will have short circuit =00TB
can be = open if connection removed
|