BICU and Controller Board
D127/D128 4-32 SM
4.10 BICU AND CONTROLLER BOARD
 Turn off the main power switch and unplug the machine before starting replacement.
 Before turning off the main power switch, check that no mechanical component is
operating. Mechanical components +may stop out of their home positions if you turn off
the main power switch while they are operating. The component may be damaged if you
try to remove it when it is not in the home position.
4.10.1 BICU
Preparation
 Before replacing the NVRAM, be sure to save the NVRAM data.
 Saving from the BICU NVRAM to an SD card ( p.5-3 "NVRAM Data Upload/Download" in
the "System Service Mode" of the appendices of the this manual.)
Procedure
1. Rear cover (
p.4-3 "Rear Cover")
2. Controller box [A] (
x 6, x 2)
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