Tektronix 684A User Manual

Removal and Installation Procedures

TDS 684A, TDS 744A, & TDS 784A Service Manual

You should have completed the Access Procedure before doing any procedure in
this collection. The procedures found here, listed in order presented, follow.

H Fan

H A14 D1 Bus and Analog-Power and Digital-Power Cables

H A23 SerPar Board

H A29 Video Trigger Board

H A11 Processor/Display Board

H Top Cover and Board Brackets

H Rear-Panel Cables

H A10 Acquisition Board

H Rear Chassis

1. Assemble equipment and locate module to be removed: Have handy a

screwdriver with a size T-20 Torx

R tip (Items 1 and 3). Locate the fan in the

locator diagram Outer-Chassis Modules, Figure 6–2, page 6–13.

2. Orient the oscilloscope: Set the oscilloscope so its bottom is down on the

work surface and its left side is facing you.

3. Disconnect the fan from processor/display board: Unplug the fan’s power

cable from J20.

4. Remove the fan: Remove the two screws securing the fan to the main

chassis, and lift the fan away from the chassis.

5. Reinstallation: Do in reverse order substeps 3 and 4, reversing the removal

instructions in each substep to reinstall the assembly. See the procedure Rear
Cover and Cabinet (page 6–18) to complete reassembly of the oscilloscope.

1. Assemble equipment and locate modules to be removed: Have handy a

screwdriver with a size T-15 Torx

R

 

tip (Items 1 and 2). Find the modules to

be removed in the locator diagram Outer-Chassis Modules, Figure 6–2,
page 6–13.

2. Orient the oscilloscope: Set the oscilloscope so its left side is down on the

work surface and its front is facing you.

3. Remove the D1 bus: Grasp the D1 bus and pull it up from the oscilloscope to

unplug it from its two plug-in connectors. (J28 is the connector on the