Agilent Technologies 66000A, Service Manual, Page: 17 / 53

Disassembly 17
1. Use the Pozi driver and remove the line cord from the unit. Note the color code and location of each wire on the
terminal block before removing the cord.
2. Use the T15 driver and remove the four screws (two on the front and two on the back) that attach the backplane cover
(MP5) to the subchassis (MP4).
3. Pull the bottom edge of the cover out slightly so that it clears the alignment pins and lift the cover straight up.
4. Grasp the Backplane board (A2) firmly and lift it straight out of its plug-in sockets.
5. Check to make sure that the FLT/INH connector is unplugged from the back of the unit.
6. Use the 7mm hex driver and remove the two nuts that connect the GPIB connector to the rear panel.
7. Use the 10mm hex driver and remove the nut that connects the ground wire to the rear panel.
8. Use the T15 driver and remove the three screws that attach the Main board (A1) to the subchassis (MP4).
9. Carefully lift up the pc board and remove it from the subchassis.
Reassembly Procedures
Most of the attaching hardware is metric. Use of other types of fasteners will damage threaded inserts.
Installing the PC Boards
1. Align the connectors on the Main board (A1) with the cutouts in the rear panel and carefully install the board in the
subchassis (MP4).
2. Make sure the Main board is fully inserted in the notches along the edge of the subchassis.
3. Use the T15 driver and install the three screws that attach the Main board to the subchassis .
4. Use the 7mm hex driver and install the two flat washers, split washers, and nuts that fasten the GPIB connector to the
rear panel.
5. Install the Backplane board (A2) into the connectors on the Main board.
6. Connect the ground hardware to the chassis in the following order:
a. lock washer.
b. ground wire.
c. lock washer.
d. nut.
7. Use the 10mm hex driver and tighten the grounding nut.
8. Align the slots in the backplane cover (MP5) with the notches on the Backplane board (A2) and snap the cover into
place. Use the slot-head screwdriver to align the board in the slots.