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Removal and
When necessary, refer to other removal procedures.
Replacement
of
1 .
the Fan
2.
Turn off the instrument and disconnect the power cable.
Remove the six screws from the top and the two screws from each side of the
instrument's top cover.
Lift off the top cover.
3 .
4.
5 .
6 .
7 . Replace the fan by reversing this procedure.
Remove the Rear Panel Assembly.
Pull the rear panel out until the fan clears the instrument cabinet. It is not
necessary to completely remove the rear panel.
For reassembly, note the orientation of the fan cable. Remove the fan by
removing the four screws securing the fan to the rear panel.
IIC I
Note d
When you reinstall the top cover, insert the four screws on the sides of the cover
f
lrst while making sure the cover fits into the grooves of the instrument cabinet.
Then insert the six screws in the top of the cover.
Removal and
Replacement
of
the Main
Assembly
Caution
c
ELECTROSTATIC
DISCHARGE
can damage electronic components.
Use
grounded wriststraps and mats when servicing the main assembly.
When necessary, refer to other removal procedures.
1.
2.
Turn off the instrument and disconnect the power cable.
Remove the six screws from the top and the two screws from each side of the
instrument's top cover.
3.
4.
5 .
6 .
Lift off the top cover.
Remove the Disk Drive, Power Supply, and Oscilloscope Assembly.
Loosen the two screws that hold the rear bracket on the oscilloscope
assembly support panel until the bracket moves freely.
Remove the support panel by tilting the rear of the panel up and lifting the
panel out through the top of the instrument cabinet as in the previous figure
6D-4. Make sure the metal tabs on the support panel clear the front panel.
7. Remove the Rear Panel Assembly.
--
Assembly
Removal
and Replacement
HP 1652B/1653B
6D-10
Service Manual
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