Tektronix 11302A Service Reference Manual page 210

Corrective Maintenance
A 15 Counter/Timer Reference Board
The A15 Counter !Timer Reference board is an 11302A option (number lT).
If
installed, it is mounted on the chassis inside the rear panel.
Remove the AlS Counter trimer Reference board as follows:
1.
Position the 11302A on its left side, as facing the rear.
2. Remove the six Torx screws from the rear panel plate. These screws are
shown in Figure 3-18.
3. Ease the rear panel plate away from the rear casting. Allow the plate to
remain suspended from its wire connections.
• Protect the surfaces underneath the plate from scratches.
4. D isconnect the delay line leads from the A12 Vertical Amp board and
remove the two screws holding the Delay Line Adapter board. Carefully
extract the leads and board, and move them out of the way.
5.
As
viewed from the rear, the A15 Counterffimer Reference board (as shown
in
Fig. 3-16) is located to the left of the CRT socket.
J26
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J40
Figure 3-16. Connector locations for removal of the A 15 Countermmer Reference board (option 1 T).
3-48
Maintenance-11302A Service Reference