NEC NP-NC900C-A Service Manual page 64

KEY PART REPLACEMENT (Method of disassembly/Photo taken from life)
1-12 Security Switch & Interlock Board
Loosen 1 screw on the security switch
module to take it off. Torque: 1.5~2 kgf-cm.
Loosen 2 screws on the front outside cover to
take interlock board off. Torque: 1.5~2 kgf-cm.
Loosen 4 screws on the interlock board to
take it off. Torque: 5~6 kgf-cm.
"Confidential, Do Not Duplicate without written authorization from NEC."
Take security switch off to put on the desk.
Take interlock board off to put on the desk.
Put the interlock board on the desk.
5-13