Skanti TRP 9250, Technical Manual, Page: 157 / 289

TROUBLE SHOOTING
If a malfunction should occur in the TRP 9250, the following instructions should be followed in order
to locate the module which is causing the malfunction :
1. If possible execute the built in selftest. An ’Error Code’ for the failing module will be
displayed. A description of the ’Error codes’ is included on the following pages..
2. If an execution of the selftest failed, check that all cables and plugs are correctly
connected, and that the supply voltage is correct. At this point the fuses should be
checked.
3. If the Control Unit display is flashing all annunciators, it indicates missing data
communication between the Control Unit and the Transceiver Unit. This could be caused
by a bad cable connection on the data wire between the 2 units.
4. The next step is to open the Transceiver Unit and :
a. Check internal fuses, cables and plugs.
b. Check that the left LED (Light Emitting Diode) on the SMPS assembly
is constantly on; indicating that the Switch Mode Power Supply is
on and able to p7.5 V DC.
c. Check that the second left LED on TU Control Board 910 is flashing twice a
second, indicating that the microcomputer is operating properly.
d. Check that the LED on the optional PCP 717S is flashing once every 2 seconds,
indicating that the microprocessor is operating properly.
5. If the above steps did not help, please contact your local SKANTI Service Agent.
A list of SKANTI Service Agents is found in the rear part of this chapter.
TROUBLE SHOOTING SERVICE
TRP 9250 TECHNICAL MANUAL 5-7