NEC NP-NC900C-A Service Manual page 54

KEY PART REPLACEMENT (Method of disassembly/Photo taken from life)
1-2 Rear Outside Cover & Fan B Board & Fan E Board
Loosen 6 screws on the rear cover. Then,
take out the rear cover. Torque: 7~8 kgf-cm
Loosen 2 screws on the Fan B board and
unplug 3 connectors. Then, take it off.
Torque: 5~6 kgf-cm
Unplug 1 connector on the Router board.
"Confidential, Do Not Duplicate without written authorization from NEC."
Loosen 2 screws on the rear LED bracket.
Torque: 5~6 kgf-cm. Then, take it off.
Loosen 2 screws on the Fan E board and
unplug 3 connectors. Then, take it off.
Torque: 5~6 kgf-cm
Unplug 1 Internet cable on the Router board.
5-3