Motorola IMPRES Tetra MTP700, Detailed Service Manual

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TRANSCEIVER 800 MHz MTP700 Portable Radio / Detailed Service Manual 4.2 - 55
Troubleshooting (800 MHz)
General
Troubleshooting faults in the radio require proper understanding of the different circuitry
contained in the radio. Since the radio contains a highly integrated system, the software
and hardware functions can not be separated easily. Thus, it is also necessary to under-
stand the functioning of different ICs and the role of the software in the operation of the
radio.
This service manual includes schematic diagrams, circuit board layouts, block diagrams,
and troubleshooting procedures, which help a technician to troubleshoot a malfunctioning
circuit and detect a defective component.
The radio is tuned and tested at the factory. The results of the tuning procedures are
stored in a special EEPROM. This information includes tuning and other system parame-
ters. The area of the memory in the radio where the tuning information stored is called the
“codeplug”. A radio codeplug can be read using the CPS programme.
Test Procedures
This section explains the procedures required to troubleshoot a MTP700 radio.
The digital tests should be performed using the GoNoGo PATS test and TETRACom SW.
To use the TETRACom you must go to test mode by using the command <Test Enter>.
Troubleshooting Flowcharts
Use the following flowcharts to troubleshoot the radio. These flowcharts contain proce-
dures using TETRACom SW application, GoNoGo PATS test and factory test modes for
troubleshooting radios having digital, receiver, transmitter, or frequency generation test
failures.
NOTE The CPS has no capability to tune the radio. Tuning the radio can only be
performed at the factory or at the appropriate Motorola Repair Centre.
Components replacement can affect the radio tuning and must only be
performed by the appropriate Motorola Repair Centre.