PCBs and Other Items
SM 4-58 D017/D018/D019/D020/D084/D085
4.9 PCBS AND OTHER ITEMS
 Turn off the main power switch and disconnect the power cord before you start any
of the procedures in this section.
4.9.1 CONTROLLER BOARD
 If you intend to replace the NVRAMs, upload their contents to an SD card with
SP5824 before you remove them and replace them with new ones. Never remove
the NVRAMs until after you have uploaded their contents.
Before replacing the controller board in the model without HDD
When you replace the controller board in a model without a HDD, address book data can be
copied from an old controller board to a new controller board using an SD card.
Copy the address book data to an SD card from the flash ROM on the controller board with
SP5846-051 if possible.
Replacement Procedure
1. Remove:
[A] Controller plastic cover (
x1)
[B] FCU faceplate (
x3)
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