A3 Ammeter Board Assembly Removal; Removal Procedure; A5 Ac Inlet Board Assembly Removal; Keyboard Assembly Removal - Agilent Technologies 4339B Service Manual

A3 Ammeter Board Assembly Removal

Removal Procedure

1. Remove the cover while referring to \Cover Removal".
2. Disconnect the cable assembly connected to the transformer assembly, from the A3 board.
3. Disconnect the four optical ber cables from the A3 board.
4. Disconnect the four optical ber cables from the A1 Main Board Assembly
Caution To avoid damaging on the optical ber cable caused by bending or other
mechanical stress, remove all the ber cables from the 4339B when replacing
either the A1 board or the A3 board.
5. Disconnect the cable assembly, which includes a core, from the front of the A3 board.
6. Remove the screw which fasten the cable assembly on the front of the A3 board.
7. Remove four screws that secure the A3 board to the chassis.
8. Remove the A3 board from the chassis.

A5 AC Inlet Board Assembly Removal

Removal Procedure

1. Remove the cover while referring to \Cover Removal".
2. Disconnect the 4 pin connector cable assembly from the A5 board.
3. Remove the screw which xes the green and yellow wire connected to the neutral terminal
of the power cable connector to the bottom of the chassis.
4. Remove the four screws that secure the A5 board to the chassis.
5. Remove the A5 board from the chassis.

Keyboard Assembly Removal

Removal Procedure
1. Remove the cover while referring to \Cover Removal".
2. Disconnect the two atcable assemblies and the wire assembly from the front side of the
A2 board.
3. Remove the screw which fastens the cable assembly on the front side of the A3 Ammeter
Board Assembly.
4. Remove the screws which fastens the cable assembly on the left front side of the chassis.
5. Remove the side trim label from both sides of the front bezel.
6. Remove the four screws that secure the front panel bezel to the chassis from both sides.
7. Place the front panel assembly, so that the front panel faces down.
8. Remove the wire assembly from the keyboard.
9. Remove the screw that secures the keyboard to the front panel bezel.
10. Remove the keyboard assembly from the front panel bezel.
Assembly Replacement 3-13