American Dynamics ADODHCL Installation And Service Manual page 15

Picture Grainy or Discolored
Check the fans. If they are not turning, the camera
dome may be overheating. See "Dome Does Not
Respond to Commands" on page 14.
Poor or No Video
See "Dome Does Not Respond to Commands" on
page 13.
AD DELTADOME OUTDOOR HOUSING
8000-2616-04, Rev. B
Ice Forms On Bubble
Follow steps until the problem is corrected. See
page 16 to order parts.
1. Verify that fans in housing are working.
If not, see "Fans Do Not Turn" on page 14.
2. Determine if housing and eyeball assembly
is receiving power.
Look for evidence such as a picture on the
video monitor or dome movement.
3. Remove housing and eyeball assembly to
access environmental PC board.
Note: Power to heater comes from housing and
eyeball assembly. Heater will not function with
this assembly removed.
CAUTION: Touch metal housing before
handling environmental board.
4. Verify power is reaching housing.
Press and hold switch SW2 and observe the
green (ac power) LED. Green LED should glow
steadily. If not, check power at J-box and ac
cable plugged into connector P7 on other side
of environmental PC board.
CAUTION: Connector screws on ac connector
are delicate. DO NOT over tighten them! Use a
2.5mm (0.1") slotted screwdriver. Wider blade
widths can damage connectors.
5. Check heater connector.
Is heater connector on other side of environ-
mental PC board plugged into connector P2?
YES: Unplug heater cable and check heater
resistance across pins of plug. Is resistance
approximately 16 ohms?
If OK, replace environmental PC board
0301-0949-01. If not, replace fan/heater
assembly 0400-0935-01 by removing two
screws. Refer to Figure 18.
NO: Plug connector in, reinstall
environmental PC board, and reconnect
housing and eyeball assembly. If fans still do
not work, replace fan/heater assembly.
INSTALLATION AND SERVICE GUIDE 15