NEC SV8500 Operation And Maintenance Manual - page 688
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CHAPTER 5
Operation Procedure for System with PIR
•
Replacement Procedure of TSW (Time Division Switch) Circuit Card
•
Replacement Procedure of MUX (Multiplexer) Circuit Card
(2) Initialize the system by pressing INIT button on the EMA card.
(3) Check to see that any fault information is displayed.