Specifications
24  INSTALLATION AND SERVICE GUIDE 
SpeedDome Ultra III and IV Camera Dome
s
8000-2573-18, REV. 
D
4.  Isolate problem to housing and eyeball 
assembly or base by attaching dome to another 
base with I/O board. Does dome display video 
or respond to commands? 
YES  Problem is likely cable connections or I/O 
board if used. Go to step 5. 
NO  Ship dome and base to NSC. Place dust 
cover over spring
 finger connector on I/O 
board. 
5.  Verify coaxial video cable is securely connected 
to coax of I/O board (Figure 20). Is cable 
disconnected? 
YES Connect cable. 
NO  Go to step 6. 
Figure 20. I/O board connector and jumper 
locations 
1
P1
P4
P3
P8
P7
JW1
I/O BOARD
JW1 Terminations
FUNCTION
Terminated
Unterminated
PINS
1-2
2-3
Pin 1
Pin 1
Pin 1
Pin 1
6.  Observe green power LED on I/O board 
(Figure 21). Is green LED off or not on steady? 
YES  Verify 24Vac cable is properly attached. If 
O.K., replace I/O board or ship entire 
dome to the NSC. 
NO  Go to step 7. 
P7 Connector (AC in) 
Pin Color Designation 
1 Black 24 Vac 
2 Red Ground 
3 White 24 Vac 
7.  Observe yellow communication LED on I/O 
board (Figure 21). Is yellow LED flashing? 
YES  Go to step 8. 
NO  Verify cable is properly attached by 
referring to table in step 10, page 18. If 
OK, replace I/O board or ship dome and 
base to NSC. 
Figure 21. I/O board switch and LED locations 
Comm. LED
Power LED
RS422 Test
Pushbutton
SW1










