Power-up and testing 
EST3 Installation and Service Manual  6.11 
2.  Starting with the network in the normal condition, use the 
status command to verify all connected cabinets are 
communicating over the network. 
3.  Disconnect the network data communications wiring 
(TB2-17/18 & 19/20) from the cabinet with the primary 
LCD module, and verify that all the other system cabinets 
connected to the network appear in the trouble queue. 
3-RS485 card installed in CPU, Class A 
configuration 
1.  Verify the card is properly seated in its connector and 
secured with the snap rivet. 
2.  Starting with the network in the normal condition, use the 
status command to verify all connected cabinets are 
communicating over the network. 
3.  Disconnect the network data communications wiring 
(TB2-17/18 & 19/20) from the cabinet with the primary 
LCD module and verify that a Class A network 
communications fault is annunciated. Repeat step 2 to verify 
that all connected cabinets still communicate over the 
network. 
3-IDC8/4 Initiating Device Circuit module 
1.  Familiarize yourself with the circuit configuration of the 
individual module to be tested. Remember, modules of the 
same type can be configured differently. 
2.  For circuits configured as initiating device circuits (IDCs), 
activate the circuit by shorting the circuit’s two terminals. 
Verify that the appropriate message appears in the proper 
message queue. Disconnect the circuit or EOL resistor. 
Verify that a Trouble message appears in the Trouble 
message queue. 
3.  For circuits configured as Notification Device Circuits 
(NACs), turn on the circuit by activating an IDC 
programmed to turn on the NAC, or use the activate output 
device command via the keypad. Verify that the circuit 
activates properly. Restore the circuit. Disconnect the circuit 
or EOL resistor. Verify that a Trouble message appears in 
the Trouble message queue. 
3-SSDC(1) Signature Driver Controller module 
1.  Verify that the module is properly seated in both rail 
connectors and secured with the two snap rivets. Verify that 
removable terminal strips TB1 and TB2 are firmly seated.