American Dynamics SpeedDome Ultra Installation And Service Manual page 52

Procedure
Perform steps in sequence until the problem is
corrected.
1. Check the video on the monitor.
No video? Go to step 2.
Is the contrast or color off?
• YES: Send both the dome and its base back to
the National Repair Center. Place the dust cover
over the spring fingers on the I/O board.
• NO: Go to step 2.
Does the video roll when switching between
monitors?
• YES: Use the video controller or switcher to
synchronize the video vertical sync phases of all
domes to the ac line. For specific instructions,
see the installation and service manual for the
controller or switcher.
• NO: Go to step 2.
2. Check ac power and video connections at
the J-box.
Is 24Vac absent? Is a video signal absent?
• YES: Correct problem at J-box.
• NO: Go to step 3.
3. Check dome address switches (Figure 4-1).
Detach the dome from its base and examine the
address switches. Are they set correctly?
• YES: If the dome still doesn't respond, then the
problem is likely in the dome. Ship both the base
and dome (or at least the I/O board and dome) to
the NRC. If you must repair the dome, see
"Detailed Troubleshooting", page 4-5.
• NO: Set the correct address and reattach the
dome.
Figure 4-1.
SW3
SW2
MSB
0 9 0
SW1
LSB
9 0 9
SPEEDDOME ULTRA
4. Isolate the problem to the dome or its base.
If another base is nearby, detach the dome and
reattach it to the other base. Does it display video or
respond correctly to commands?
• YES: Then the problem is likely the cable
connections to the I/O board or the board itself.
Go to step 5.
• NO: Send both the dome and its base back to
the National Repair Center. Place the dust cover
over the spring fingers on the I/O board.
5. Verify that the coaxial video cable is
securely connected to the coax of the I/O
board (Figure 4-2).
Is the cable disconnected?
• YES: Connect the cable.
• NO: Go to step 6.
Figure 4-2.
Pin 1
JW2/JW3 Terminations*
*
4-3
SERVICE
Pin 1
Pin 1
P3
P7
P4
P8 Pin 1
P1
I/O BOARD
JW1
JW3
JW2
JW1 Terminations
PINS FUNCTION
1-2
Unterminated
2-3 Terminated
PINS FUNCTION
1-2
SensorNet
2-3 For Future Use
Jumper locations are
not relevant when the
dome is hooked up to
an RS422 network.