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Maintenance
How to Remove and Replace a BNC Connector Assembly (BCA)
1.
Remove the front panel as outlined in "How to Remove the Front Panel."
2.
Unplug the coaxial end-lead connector from the back of the BCN. A flat, flexible, seven-conductor cable
connects probe information from the Main board to the BCA.
3.
Unplug the probe information connector from the Main board.
4.
Use a Torx screwdriver to remove the four screws that fasten the BCA to the front subpanel.
5.
Remove the BCA from the oscilloscope.
To replace a BCA, proceed as follows:
6.
Set the gray connector alignment ring on the BCA with its index on the inside of the BCA. The "inside" is
the side where the flat cable enters the BCA.
7.
Insert the BCA, and the connector alignment ring, into the hole in the front subpanel. Check that a) the
flat cable faces the inside of the 11A52, and b) the index on the connector alignment ring fits into the notch
in the front subpanel.
8.
Use a Torx screwdriver to install the four screws that fasten the BCA to the front subpanel.
9.
Plug the probe information connector into its socket on the Main board.
10.
Plug the coaxial end-lead connector from the attenuator into the BCA. For best result, proceed as follows:
a.
Check that the center conductor is straight. Straighten
if
necessary.
b.
Plug the connector straight into the receptacle.
11.
Install the front panel as outlined in "How to Install the Front Panel."
How to Remove an Attenuator Assembly (AA)
1.
Unplug the coaxial end-lead connectors from the input and output of the Attenuator Assembly (AA).
2.
Use a Torx T-9 screwdriver to remove the two screws that fasten the subject AA to the Main board.
3.
Using care to keep it straight, unplug the AA from the Main board. Avoid disengaging one end of the AA
before disengaging the other end. Do not apply force to any subcomponents on the AA.
How to Install an Attenuator Assembly (AA)
1.
Set the 11A52 on its side with the pushbuttons down.
2.
Align the AA pins with the connector on the Main board, and align the attenuator frame with the holes in
the Main board.
3.
Plug the AA into its connector on the Main board. Do not apply force to any subcomponents on the AA.
3-14
11A52 Extended Service Manual
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Table of Contents
Troubleshooting
