Tektronix RSA3303A Service Manual page 175

A70 DC Power Board
RSA3303A & RSA3308A Service Manual
1. Assemble equipment and locate module to be removed:
a. You will need a #2 Phillips screwdriver (Items 1 and 3).
b. Locate the A70 DC power board in locator diagram Mother board and
its daughter boards, Figure 6- -6, page 6- -16.
c. Do step 3 in the A10 A/D Board procedure on page 6- -37 to remove the
board support bracket.
2. Orient the analyzer: Set the analyzer so its bottom is down on the work
surface and its front is facing you.
3. Remove the rear support bracket: See Figure 6- -20.
a. Remove the two screws securing the bracket to the A70 board.
b. Remove the four screws securing the bracket to the main chassis.
c. Lift the bracket away.
4. Remove the A70 DC power board: See Figure 6- -20.
a. Unplug the fan power cable from J300 and J302.
b. Unplug the cable W75 (GPIB) from J410.
c. Lift up the A70 board.
5. Reinstallation: Reverse step 3 to reinstall the A70 board and interconnect
cables.
Removal and Installation Procedures
6- 41