DET-RPM-RAP-FC06

10000 - 10651 - Restart RPM - Decision, Notes: 9946

Yes
Go to
1544 - 546 - Done - Complete, Notes: 547
No
Go to
9998 - 9941 - Measure discriminator voltages - Decision, Notes: 9997
Step Reference Number
01
Note
9946 - Restart the RPM by cycling the on/off switch on the LD-260
8861 - Did this fix the Issue?

9995 - 9910 - Gently wiggle signal cable - Decision, Notes: 9911

Yes
Go to
9993 - 9851 - Replace affected signal cable - Decision, Notes: 9852
No
Go to
9992 - 9990 - Measure PMFX Box input high voltage - Decision, Notes: 9991
Note
9911 - Gently wiggle the affected channel’s signal cable above the connector where...
9994 - Gently wiggle the affected channel’s signal cable above the connector where...
9913 - Did the displayed count rate change?

9969 - 9884 - Swap signal cables at SCA-774 board - Decision, Notes: 9965

Yes
Go to
9967 - 9964 - Swap cables at bottom of PMFX Box - Decision, Notes: 9885
No
Go to
9958 - 9869 - Swap SC-770 controller connectors - Decision, Notes: 7236
Note
9965 - Navigate to SHOW COUNTS on the SC-770  
9968 - While watching SHOW COUNTS, switch the BNC connectors for neutron CH3 and CH4...
9888 - Did the fault indication move from the original channel to the other?

9958 - 9869 - Swap SC-770 controller connectors - Decision, Notes: 7236

Yes
Go to
9098 - 9096 - Replace SCA-774 Board - Formal Procedure, Notes: 9007
No
Go to
9095 - 9093 - Replace SC-771 Controller Board - Formal Procedure, Notes: 9007
Note
7236 - Move LD-260 switch to OFF position. The PWR ON
9870 - Switch the positions of the large 19-pin connectors on the bottom of the SC-7...
7367 - Move LD-260 switch to ON position. The PWR ON
9871 - Wait for controller to complete POST and obtain initial background
9957 - Did the fault indication move from the original pillar (for example: DET 5/6 ...

9987 - 9983 - Replace high voltage cable - Decision, Notes: 9984

Yes
Go to
9982 - 9978 - Perform Functional Compliance Test - Formal Procedure, Notes: 9007
No
Go to
9971 - 9855 - Replace High Voltage Board - Formal Procedure, Notes: 9007
Note
9984 - Replace the high voltage cable between the SCA-775 module and the PMFX Box
9985 - Attempt to adjust neutron high voltage on the neutron HV-448/458 board R1 to ...
9986 - Is the neutron high voltage between +1365 VDC and +1385 VDC?

9967 - 9964 - Swap cables at bottom of PMFX Box - Decision, Notes: 9885

Yes
Go to
9961 - 9959 - Replace MHV cable - Decision, Notes: 9960
No
Go to
9956 - 9953 - Replace PMFX Box - Formal Procedure, Notes: 9007
Note
9885 - Navigate to SHOW COUNTS on the SC-770
9965 - Navigate to SHOW COUNTS on the SC-770  
9966 - While watching SHOW COUNTS, switch the pairs of MHV connectors for neutron CH...
9888 - Did the fault indication move from the original channel to the other?

9963 - 9898 - Reset ULD/LLD - Decision, Notes: 9899

Yes
Go to
1544 - 546 - Done - Complete, Notes: 547
No
Go to
9958 - 9869 - Swap SC-770 controller connectors - Decision, Notes: 7236
Note
9899 - Navigate to DSCR. ADJUST on the SC-770
9962 - 2:Neutron>2:Functions>2:DSCR. ADJUST
9901 - Press the * key to reset control pillar to default values
9902 - Press the # key
9903 - Press the * key to reset auxiliary pillar to default values
9904 - Press the # key 3 times to exit programming mode
9871 - Wait for controller to complete POST and obtain initial background
8861 - Did this fix the Issue?
Flowchart Title
Radiation Detection - Neutron