use a flat blade screw driver and install the four flat-head screws into the enclosure
standoffs.
Figure 3-27: Power Supply board replacement
A. Non-terminal end of Transmitter Electronics Enclosure
B. Power Supply board
C. I.S. Barrier board (inside the Guide Plate)
D. Acquisition cable
E. Backplane board
5. 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).
6. Plug the new Power Supply board and the I.S. Barrier Board onto the Backplane
Board.
7. Insert the Backplane, I.S. Barrier board and the Power Supply Board into the
enclosure and fully seat the CPU Module and Optional I/O Module.
8. Attach the Backplane to the enclosure standoffs with the four Phillips head screws.
If the Local Display Module is installed on the Backplane, use a flat blade screw
driver and install the four flat-head screws into the enclosure standoffs.
9. Use a flat blade screw driver and install the terminal blocks on the CPU Module,
Optional I/O Module, I.S. Barrier Board and the Power Supply.
10. Recheck the connections, wiring and switch settings before replacing the end caps.
Meter repairs Maintenance and Troubleshooting manual
August 2021 P/N 3-9000-791
82 Models 3415, 3416 and 3417 GUSM
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