Chapter 9 Page no. 1560
JC-DR-A-404.fm
GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card D/R A404 - HV Unit
4. Using a voltmeter (rating 1000 V DC), check that there is no residual voltage between screws S1 and
S2 before proceeding.
WARNING
Residual voltage stored in the resonant capacitors can be dangerous. Ensure that the res-
onant capacitors are fully discharged before you handle the HV Unit.
5. On the HT block, disconnect the following, in the sequence listed:
- HT connector (1)
- heating/bias connector GKB (2)
- green ground connection (3) (8 mm open-ended wrench)
- white and black ground connections (two wires) (4) (8 mm open-ended wrench)
- inverter GKA/1 and GKA/2 (5) (8 mm open-ended wrench)
- HT probe cable: GKC (6)
S2
S1
RC2
RC1
1
2
6
3
4
5
7
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