Siemens MOBILETT XP Troubleshooting Manual page 64

64
Fig. 27: Test point FC1 75 kHz
Measuring preheating
•
Switch off the system
•
Remove the top cover and, in the case of MOBILETT XP Digital, place it on its side on a
table or similar surface (do not disconnect any cable connections).
•
Oscilloscope channel 1 at D916 TP "I" (7) and D916.GND (1) - resonant filament cur-
rent
Oscilloscope setting: trigger channel 1, trigger stage 1 V, 2 V/div, sweep 100 µs/div
•
Select 81 kV and 5 mAs on the control panel In the case of XP Digital, switch to the
manual operating mode
•
Use exposure switch S27 to press and hold "PREP"
NOTE
MOBILETT XP
Below is the oscillogram of the resonant filament current during preheating
See the "MOBILETT XP, Replacement of parts" instructions for in-
formation on setting the filament current on the D916.
SPR8-230.840.01.05.02
11.05
Basic functions
Page 64 of 72
CS SD 24
Siemens AG
Medical Solutions