HP 1652B Getting Started Manual page 709

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Removal and
When necessary, refer to other removal procedures.
Replacement of
1. Turn off the instrument and disconnect the power cable.
the Keyboard
Assembly
2. Remove the six screws from the top and the two screws from each side of the
instrument's top cover.
3. Lift off the top cover.
4. Remove the Disk Drive, Power Supply, and Oscilloscope Assembly.
5. Loosen the two screws that hold the rear bracket on the oscilloscope
assembly support panel until the bracket moves freely.
6. Remove the support panel by carefully tilting the rear of the panel up and
lifting the panel out through the top of the instrument cabinet. Make sure
the metal tabs on the front of the support panel clear the front panel.
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Figure 6D-4. Support Panel Removal
7. From the back side of the front panel, remove the four screws securing the
keyboard assembly to the front of the instrument cabinet.
8. Disconnect the keyboard assembly ribbon cable from the Main Assembly.
9. Pull on the knob to remove the keyboard assembly (label, keyboard panel,
keypad, PC board, RPG, and knob) from the front panel as one unit.
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Assembly Removal and Replacement
6D-8
HP 1652B/l653B
Service Manual