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Replacing the Motherboard
To replace the motherboard of the ACE3600 RTU, follow the procedure below.
Procedure 29-8 How to Replace the Motherboard
1. If the unit is installed in a NEMA 4 housing, unscrew the four large screws and remove the
metal chassis from the housing.
2. Remove all modules from the outermost slots, generally the power supply module from the
leftmost slot and I/O module from the rightmost slot.
3. Unscrew the M5 screws on each side which secure the motherboard to the metal chassis.
Save the screws. See Figure 29-2.
4. From inside the cage, push out the small cover on the side of the RTU cage. Save the
cover.
5. Slide the damaged motherboard out of the cage, through the opening on the side of the
RTU cage.
6. Slide the new motherboard into the frame, through the opening on the side of the RTU
cage.
7. Secure the motherboard to the cage and metal chassis using the M5 screws saved in step 3.
8. Replace the cover on the cage.
9. If the unit was installed in a NEMA 4 housing, replace the metal chassis in the housing and
screw the four large screws from the metal chassis into the housing.
10. Replace the modules in their respective slots.
11. Make sure that the ground is reconnected.
Figure 29-2 ACE3600 Motherboard on Metal Chassis
29-5
Break/Fix Procedures
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