Tektronix 11801B Service Manual page 165

Corrective Maintenance
A5 Time Base/Controller Board
Removal and replacement steps are listed below. See Figures 6-10 and 6-32
for connector, screw, and index locations.
(C] Step 1: Piace the instrument in the inverted position.
Ol Step 2: Remove connectors J16, J29A, J30A, J32, J35, J91, and Extatt
from the A5 Time Base/Controller board. Then, remove connectors J18
and J83 from the A5 Time Base/Controller board. Note the position of
the multi-pin connector's index triangles to ensure that the connectors
can be correctly replaced.
NOTE
Record the positions of the connectors and the receptacles to
ensure that these connectors and receptacles will be positioned
correctly when reinstalled.
ia Step 3: Remove the six Torx head screws holding the board in piace.
LL] Step 4: Remove the A5 Time Base/Controller board.
To replace the board, perform the previous steps in reverse order.
11801B Service Manual 6-35