American Dynamics SpeedDome Ultra Installation And Service Manual page 53

6. On the I/O board in the base, observe the
green power LED (Figure 4-3).
Is the green LED off or not on steady?
• YES: Pop the board out and verify that the 24Vac
cable is properly attached to connector P7. If
O.K., then replace the I/O board.
• NO: Go to step 7.
P7 Connector (AC In)
Pin Color
1 Black
2 Red
3 White
7. On the I/O board in the base, observe the
yellow communication LED (Figure 5-3).
Is the yellow LED flashing?
• YES: Go to step 8.
• NO: Pop the board out and verify that the RS422
or SensorNet cable is properly attached to
connector P1. If OK, then replace the I/O board.
P1 Connector (RS422 Data Comm.)
Pin Color
1 Orange
2 Green
3 Yellow
4 Brown
5 —
6 —
P1 Connector (SensorNet Data Comm.)
Pin Color
1 —
2 —
3 —
4 —
5 Orange
6 Yellow
Figure 4-3.
RS422 Test
Pushbutton
Comm. LED
Power LED
Designation
AC
Ground
AC
Designation
RS422 Data In High (+)
RS422 Data In Low (–)
RS422 Data Out High (+)
RS422 Data Out Low (–)
—
—
Designation
—
—
—
—
SensorNet (brown for outdoor)
SensorNet
SPEEDDOME ULTRA
8. If using RS422 communications, check the
comm. line connections on the I/O board.
If using RS422 communications, press and hold the
pushbutton shown in Figure 4-3 and observe nearby
red and green LEDs. These LEDs indicate the
following:
• Constant green with blinking red. Indicates
the RS422 line is correctly wired. Go to step
9.
• Constant green with no red. Indicates that
RS422 "Data In" – is shorted to ground. Look for
possible shorts. If none are found, replace the
I/O board.
• Constant red with blinking green. Indicates that
the "Data In" + and – wires are reversed.
Reverse the wires and retest the board.
• Blinking red, green off. Indicates that RS422
"Data In" + is shorted to ground. Look for possi-
ble shorts. If none are found, replace the I/O
board.
• Both LEDs off. Indicates that "Data In" + or –
wires are shorted or open. Look for possible
shorts or opens. If none are found, replace the
I/O board.
9. Check the spring finger connector on the
I/O board.
Reattach the dome to its original base to verify solid
contact between the spring fingers of the I/O board
and the contacts on the CPU board. Does the dome
produce video and respond to commands?
• YES: Then it is likely that the spring fingers were
not seated properly.
• NO: Then replace the I/O board.
If none of these steps worked, then send both the
dome and its base back to the NRC. To obtain a
repair authorization number, call 1-800-543-9740
(CEs) or 1-800-442-2225 (Dealers).
If you must perform detailed troubleshooting, use
extreme care when disassembling parts! See page
4-5.
4-4
SERVICE