Corrective Maintenance
Maintenance
6Ć26
See Figures 6Ć23, 6Ć26, and 6Ć32 for connector,screw, and index locations.
Remove and replace the Acquisition unit as follows (the Acquisition unit can
be removed with the instrument in the normal upright position for all steps):
CAUTION
"
"
ăStep 1:ăRemove the bolt from the top of the chassis, just behind the
frontcasting.
ăStep 2:ăRemove the trim covers from the right side (as viewed from the
front of the instrument).
ăStep 3:ăRemove the two Torxhead screws holding the frame section
and remove the frame section.
ăStep 4:ăRemove connectors J10 on the A26 M/F Acquisition InterconĆ
nect board and J34 on the A19 Strobe/TDR Buffer board. Note the
position of the connectors' index triangles to ensure that the multiĆpin
connectors can be correctly replaced.
ăStep 5:ăRemoveconnectors J29A , J30A, J32, J33A, and J33B on the
A19 Strobe/TDR Buffer board.
ăStep 6:ăGrab between the two sampling head slots and gently pull out
the Acquisition unit a few inches.
ăStep 7:ăRemove the gray ground wire from the rear of the Acquisition
unit.
ăStep 8:ăRemovethe Acquisition unit.
CAUTION
!
Toreplace the Acquisition unit, perform the previous steps in reverse order.
Acquisition UnitRemoval/Replacement