Ricoh Aficio MP2550B Service Manual page 184

PCBs and Other Items
Before touching the controller board, always touch a metal surface to
discharge any static that has accumulated on your hands.
2. Remove:
[A] Faceplate (
[B] Controller board (
Make sure that the thermal conductive sheet [C] is attached to the bracket
after replacement of this procedure.
3. Remove:
[A] Upper brace
[B] Lower brace
[C] NVRAM x2
4. Remove the NVRAMs from the old board and install them on the new board.
The NVRAM chips must always be replaced as a pair.
D017/D018/D019/D020
x3)
x4)
3-52 SM