Front Panel Disassembly; A9 Or A90 Assembly Removal; A10 Assembly Removal - Agilent Technologies 4284A Service Manual

3-8-4. FRONT PANEL DISASSEMBLY

This paragraph describes how to remove the front panel assembly from the 4284A. I n order
to remove the A9, A10, A13, A90, or A91 assembly which are shown in Figure 3-2, first dis-
assemble the front panel assembly.
1. Remove the top trim from the front frame.
2. Remove the two front feet from the bottom cover.
3. Remove the three screws from the bottom of the front frame.
4. Remove the three screws from the top of the front frame.
5. Carefully remove the 4284A's front panel assembly.

3-8-5. A9 OR A90 ASSEMBLY REMOVAL

First remove the front panel assembly from the 4284A as described in paragraph 3-8-4.
1. Loosen the two hex set screws on the CONTRAST knob and remove it.
2. Disconnect the flat cable assembly that interconnects the motherboard to the
A90 assembly.
3. Disconnect the 3 and 13-pin cables from the A90 assembly.
4. Remove the seven nuts that secure the A9 assembly.
5. Remove the four screws that secure the A90 assembly to the A9 assembly, and
slide the A90 assembly out.
6. Disconnect the 3-pin cable from the A9 assembly.
7. Disconnect the wires that connect the A90 and A9 assemblies.

3-8-6. A10 ASSEMBLY REMOVAL

First remove the front panel assembly from the 4284A as described in paragraph 3-8-4.
1. Disconnect the flatcable assembly that is connected to the motherboard from the
A10 assembly.
2. Remove the two screws, nuts, and washers that secure the A10 assembly to the
MEMORY card bezel, and remove the A10 board.
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