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60 C307M-K (11/07)
Troubleshooting
Symptom: System does not operate.
1. Check system input voltage.
2. The Esprit system is protected by a resettable overcurrent protective device located in the transformer module. Whenever a fault condition
is experienced in the system causing excessive current flow through the protective device, a change occurs that will prevent current flow.
The protective device will remain in this state as long as power is applied and the system fault remains. The protective device will reset
itself after power has been removed for a few minutes and will operate normally when the system fault has been repaired.
3. Check the camera and lens power connections and video BNC connections.
Symptom: No control/sluggish control (Coaxitron)
1. Check for correct type and length of coax cable.
2. Check for correct coax termination (refer to the controller manual to determine proper termination of video input). Normal load termination
is 75 ohms. When looping through VCRs or multiplexers, make sure the signal is terminated at the end device. Some termination symptoms
and problems are listed below.
Symptom Problem
Extremely bright video No termination or high resistance
Over contrast or contrast
level of monitor needs to
be increased to maximum
for a good video image Double termination (37.5 ohms)
3. If pan/tilt operation is sluggish, check the controller manual to make sure the control signal is set in the extended mode, not standard
mode.
4. Check that the video is terminated.
Symptom: No control (RS-422)
1. Check for correct cable type and length. The maximum cable distance for RS-422 communication over 24-gauge wire is 4,000 feet
(1,219 m). Pelco recommends using shielded twisted pairs, such as Belden 9843 or similar cable, that meets or exceeds the basic
requirements for EIA RS-422 or RS-485 applications.
2. Check for correct wire connections between transmitting device (such as the CM6700 Series matrix system) and Esprit system receiver.
Correct connections are from the transmitting device TX+ to Esprit system RX+ and from the transmitting device TX- to Esprit system RX-.
3. Check for correct DIP switch settings.
Symptom: Ground loops
Ground loops are indicated by seeing 60 Hz noise on the video.
1. Check for resistance between the grounds of the keyboard and the system. Ideally, there should be zero ohms.
2. Remove the coax BNC connector and check for voltage between the BNC shield of the controller and the BNC shield of the system.
No voltage should be detected.
It is recommended that a Pelco GIT100 ground isolation transformer be installed to eliminate the above problems.