Tektronix CSA7404B - Page 276

Removal and Installation Procedures
6-56
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
1. Locate module to be removed: Replacement of this board must be performed
by a Tektronix Service Center. Locate the Acquisition board in the locator
diagram, Figure 6--8, on page 6--21. Additional modules to be removed:
CAUTION. This board should only be replaced by Tektronix.
H Trim
H Bottom cover
H Left and Right covers
H Front and Rear Power Distribution Boards (PA Bus board)
2. Orient the instrument: Set the instrument so its top is down on the work
surface and its bottom is facing you.
3. Remove the Acquisition board: See Figure 6--37, page 6--57.
a. Disconnect EXT REF, REF OUT, SIGNAL OUT, AUX OUT, and AUX
IN coaxial cables from the rear panel BNC connectors.
b. Remove the 10 T-15 Torxdrive screws securing the Acquisition assembly
to the front chassis.
c. Remove the six T-15 Torxdrive screws securing the Acquisition
assembly to the chassis.
d. Slide the Acquisition board toward the rear of the instrument. Then lift
the board out of the instrument.
NOTE. If you are replacing the acquisition board assembly, do not remove the
remaining parts, they are part of the replaceable assembly.
Acquisition Board,
CSA7000B Series