I
,
1
6
7-2.8 F14 (KV BRAKE)
Abnormal measured tube voltage or X-ray tube discharge is detected (by the hardware).
This error message actually assume discharge in the high voltage system (especially the X-ray tube). This
error may be eliminated by aging. Perform aging first.
① X-ray tube,
② High voltage cable,
③ High voltage
transformer,
④ X CONT or NEXSC
may be defective.
High voltage cable may be poorly
contacted. Refer to "Appendix G
High Voltage Cable Connection
Procedure" in Installation Manual,
and connect it again.
Perform aging.
Same error occurs again.
Same error occurs again.
Judgement in the last item in the flow chart above is difficult. (Possibility of a defective PCB is low, false error
message could be displayed sometimes.)
If either of the following phenomena is detected, it can be clearly determined that discharge has occurred in the
high voltage system.
1. Discharge sound “pop” is issued during exposure.
2. The error message is not issued at low kV, but is issued while the kV is rising.
3. The glass is clearly clouded (due to evaporation of the target material) when seen from the X-ray tube
irradiation port.
4. The target is clearly rough when seen from the X-ray tube irradiation port.
5. Spark discharge like thick thunderbolt can be seen at the time of exposure from the X-ray tube irradiation
port.
(Make sure to take protective measures against radiation such as use of lead glass.)
An aluminum filter is provided in the X-ray tube irradiation port. When checking the inside of the glass
tube, remove the lead cone first, then remove the aluminum filter also.
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