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5.2.5
Total System Failure
If there are pictures but they cannot be changed, then note the text inserters. Write
down any special messages that may be displayed.
The system will try and place system error messages on the text inserters if the system
control computer is in difficulty. The first fix would be to try a RESET on the system RD-
AT100 control computer. This may solve the problem. Wait a few moments for the
system to re-boot. If there is no action, then connect the test monitor to the menu video
output on the back of the control computer.
Re-set the system again. Check the progress of the boot on the test monitor. It may be
that a very strong main's power corruption spike has caused change in the CMOS setup
RAM. This will be evident in the progress of the boot. If the computer is operating
correctly but the rest of the system is blank then check the power supply LED indicators.
Ensure that the LEDs are on for all outputs. If none are on, then the RD-PS6/9 may have
a blown mains fuse. Circuit diagrams are given for the power supplies, as a power
supply failure could cause significant down-time of the system. On site repair may be
carried out if required.
The power supplies are well protected with fuses so it is very unlikely that components in
a power supply will go faulty.
5.2.6
Problems with PTZ or Lens Operation
From operations on the keyboard, it can be determined if a problem is partial at a site or
a complete site fail. A loss of communications at a site will cause the system alarm to
activate for a PTZ fail.
In some instances a loss of video from the site may occur simultaneously. This
combined fault would almost certainly indicate a loss of power at the site.
On opening the site, the receiver LED indicators show the status of all fuses. If a site is
having problems with part of a control function, it is most likely that the problem is in the
external hardware of the PTZ or lens.
Most PTZ site faults occur because of poor installation and the subsequent mechanical
damage to the wiring from movement.
The error log file would also have logged any fail or restore action on the PTZ site
receiver, even if it is only because of a temporary loss of power.
However, if a PTZ site has genuinely failed then the LEDs tell the story. First is the
communications LED flashing off and on. If not, then a check of the cabling to the site
may be required.
If the power supply boards have blown fuses and the change of a fuse does not fix the
problem and the fuse blows again, a replacement of the control board may be required.
PTZ sites on poles are often susceptible to lightning strike. If this happens, then the site
receiver may not be serviceable at all.
Rev. C
5-3
HMXMU01018
10/06
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