KaVo ORTHOPANTOMOGAPH OP 2D, Руководство по обслуживанию

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72 ORTHOPANTOMOGAPH OP 2D
4. Troubleshooting
Error codes E0, E1 and E2
NOTICE!
Error codes E0, E1, E2 all indicate that the tubehead
and/or Generator board are not functioning correctly.
E0 (Tube arcing)
CAUSE
Tube arcing.
NOTICE!
Check the tube fail LED (red) in the upper right corner
of the Generator board. If it is on it indicates that the
tube is arcing.
E1 (tubehead voltage)
CAUSE
Tubehead voltage (kV) out of limits.
E2 (tubehead current)
CAUSE
Tubehead current (mA) out of limits.
SOLUTION
Use the S2terminalt to check the mA and kV feedback
signals from the tubehead to see if the tube voltage and
current are correct (Software Check).
See 5. S2terminal and service functions .
If the feedback values are not correct use the exp ser-
vice function to measure and compare the values (Re-
fer to S2terminal and Service functions in section 5).
Select an exposure time of 2000 ms (2 seconds) or
greater so that the mAfb and kVfb ADC values can be
measured.
CAUTION:
Protect yourself from radiation when carrying out
this procedure.
Press and hold down the exposure button. The "actual"
mAfb and kVfb ADC values will appear on the display
next to "target" values.
If the "actual" values differ by less that ±2kV from the
target values, the tubehead is working correctly.
If the "actual" values differ by more than ±2kV from the
target values, it indicates that there is a problem and
the tubehead must be recalibrated.