Maintenance and Troubleshooting Manual
Section 3: Meter maintenance
3-9000-764 Rev F
December 2017
Replace Backplane, I.S. Barrier or Power Supply board
39
14.
This completes the fuse replacement procedure.
3.5.3
Replace Backplane, I.S. Barrier or Power Supply board
The following sections detail removal of the Backplane board, the I.S. Barrier Board and the
Power Supply Board.
Backplane replacement
1.
If replacing the Backplane board, remove power to the meter.
2.
Refer to
for the tools required to complete this procedure.
3.
Disconnect the Transmitter Electronics Enclosure security seals, loosen the end cap
security latches (3mm Allen wrench required) and remove both end caps
(
4.
Remove the CPU Module and the Optional I/O Module (if installed).
for board locations and associated terminal blocks.
5.
Use a #1Standard Phillips head screw driver and remove the four Backplane board
screws and captive star washers from the enclosure standoffs.
6.
Pull the Backplane board out of the enclosure. This disconnects the I.S. Barrier Board.
Lay the Backplane board down with the Acquisition Cable still attached (the Power
Supply board may remain attached to the Backplane when you remove it from the
enclosure).
Figure 3-25 Backplane board replacement
7.
Use a 1/8 inch (3 mm) flat head screw driver and disconnect the Acquisition Cable
terminal block from the Backplane. Unplug the Acquisition Cable from the Backplane.
A. Non-terminal end of Transmitter Electronics Enclosure
B. Power Supply board
A.
C.
B.
D.
C. I.S. Barrier board (inside the Guide Plate)
D. Backplane board
