Removing The A2 Processor Assembly - Agilent Technologies 4418B Service Manual

Power meter
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Replaceable Parts
Assembly and Disassembly Guidelines

Removing the A2 Processor Assembly

Note
Note
Note
Note
5-10
1.
Remove the A5 daughter and A6 measurement assemblies as described on
page 5-12.
2.
Move the A2 plastic support bracket to its forward position using the two
side levers, unclip the flexi-cable retaining bar on the front panel keypad and
front panel LCD cable connectors and disconnect the cable.
3.
Disconnect the following cables from the A2 processor assembly:
power reference semi-rigid
n
fan connector
n
power supply connector
n
4.
Turn the power meter upside down and remove the three screws as shown.
(When replacing these screws use a 6 lb/in T10 screw driver.)
5.
Push the A2 processor assembly towards the front panel to release it from
the 50-pin connector. Lift it upwards to remove.
When re-assembling the processor board, ensure the A2 plastic support
bracket is returned to its locked position.
After replacing a processor board, the Power Reference Frequency and
Level must be checked. For further information refer to "Performance
Tests", on page 2-1.
After replacing a processor board, the display brightness and contrast must
be adjusted. See "Adjustments", on page 3-1.
Firmware should be downloaded to the instrument after the processor board
is replaced. Refer to "Downloading Firmware", on page 5-7.
screws
Agilent E4418B/E4419B Service Guide

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