Tektronix RSA3408B Service Manual page 170

Removal and Installation Procedures
A70 DC Power Board
5- 42
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 A42 DIFP board: See Figure 5- -22. Also see Figure 5- -37 on
page 5- -75 for the cable interconnection.
a. Unplug the SMB cables W46 (TRIG OUT) and W47 (TRIG IN).
b. Lift up the the A42 board.
4. Reinstallation:
Reverse step 3 to reinstall the A42 board and interconnect cables.
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 Motherboard and
daughterboards, Figure 5- -6 on page 5- -16.
c. Do step 3 in the A10 A/D Board procedure on page 5- -41 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 5- -22.
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 5- -22.
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.
RSA3408B Analyzer Service Manual