Replacement Procedures; Replacing The (T1) Power Transformer; Procedure - HP 8511A Operating And Service Manual

Replacing the (T1)
Power Transformer
WARNING

Procedure

Service and Replaceable Parts

Replacement Procedures

Replacement Procedures
Turn the test set OFF and disconnect the power cord from the mains.
Electrocution can result if power is not removed from the test set prior to this
procedure.
1. Turn the test set on its right side.
2. Unplug the transformer connector at J2 on the A15 regulator board.
3. Using a large pozidriv screwdriver, remove the four screws and washers
that hold the transformer onto the rear panel.
4. Using a large pozidriv screwdriver, remove the screw that holds the
transformer angle bracket to the main deck. The transformer wires
soldered to the line module are short, so do not pull the transformer out
too far.
5. Carefully remove the transformer from the test set and put it on the
bench close to the test set.
6. Strip the heat shrink tubing off the transformer wires soldered to the line
module, and unsolder the wires.
7. Unsolder the transformer ground wire connected to the chassis side rail.
8. Remove the transformer.
9. When you replace the transformer, refer to Figure 6-1 for the location of
the wires connected to the line module.
6-6 HP 8511A Test Set Operating and Service Manual