Expansion Interface Board Replacement - HP 16500A Service Manual

HP 16500A/16501A - Service

6-20. Expansion Interface Board Replacement

When necessary, refer to other removal procedures.
HP 16501A
1. Remove the power cord, all optional modules, and the bottom cover. To remove the bottom cover,
refer to section 6-10, "Cover Removal." To remove the optional module cards, refer to the Service
Manual for each module.
2. Disconnect the interface cable by pressing the release tabs on either side of the cable connector
while pulling the cable connector away from the board.
3. Disconnect the two cables on the expansion interface board. One cable is connected to the
front-panel LED and one cable is connected to the mother board.
4. Remove the two screws connecting the expansion interface board to the rear panel of the expansion
frame.
5. Carefully slide the expansion interface board out of the expansion frame.
6. Reverse this procedure to install the replacement expansion interface board.
In order to ensure correct connection of the interface cable, the 68-pin "D"
connectors on the cable are asymmetric in shape. They only fit into the ports on
the boards when oriented to match the shape of the ports.
When reconnecting the interface cable, make sure the cable connector is
properly seated into the port on the expansion interface board by pulling the
cable connector without pressing the release tabs. If the connector is properly
seated, it will remain connected to the port.
6-70
Note