Removal And Replacement Of - HP 54501A Service Manual

100 mhz digitizing oscilloscope

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HP 54501A SERVICE

6-26

When installing CRT, make certain that CRT yoke is properly aligned. THE

GROUND BRACKET MUST BE INSTALLED BEFORE THE CRT.

11 . To install CRT Monitor Assembly, reverse this procedure .

After replacement of CRT Monitor Assembly, only if necessary, perform the

CRT adjustment procedures detailed in section 4 of this manual .

6-23. Removal and Replacement of Fan

1 .

Disconnect power cable.

Remove the six screws from top and the two screws from each side of instrument .

Lift off top cover .

Remove rear panel from instrument cabinet . Refer to Removal and Installation of Rear

Panel Assembly, if necessary .

5 .

Detach line filter cable, W8, from power supply .

Detach fan cable, B1 W1, from System Board Assembly .

7 .

Remove fan by removing the four screws securing it to cabinet .

To install fan, reverse this procedure .

When replacing fan, be sure fan label is to outside of instrument to assure

fan cable is directed toward center of rear panel for connection to System

Assembly Board.

6-24 . Removal and Replacement of Feet/Tilt Stand

NOTE

1 .

Remove System Board Assembly . Refer to Removal and Installation of System Board

Assembly, if necessary .

Remove the three #10 TORXe screws securing each foot/tilt stand to the bottom of the

cabinet .

3. To install feet/tilt stand, reverse this procedure .

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