Gpio Troubleshooting - Motorola MTM800 User Manual

TROUBLESHOOTING CHARTS: 450-470MHz

GPIO Troubleshooting

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By proceeding the GPIO test, the connections as shown in the Troubleshooting
Setup (see previous pages) must be set, otherwise the terminal can be damaged.
W A R N I N G
Failure:
PATS parameters HW_CHECK_GPIO failed
Connect the radio's accessory connector to the Tetra Com interface.
On the 20 pin accessory connector connect pin 3, 4, 9, 10, 12 and pin 14 together.
After that the radio will be switched on automatically.
Run Tetra Com script for GPIO Test.
Measure DC levels with a multimeter.
The GPIO signals can be monitored with a scope while sending the
Tetra Com command "HWCHECK_M GPIO_GO". If the outputs from
the processor do not change, replace the controller.
Start
No
Did the GPIO
test fail
?
Yes
Check the following:
For GP 1 IN 0:
Check stage Q0156
For GP 2 OUT 0:
Check stage Q0159
For GP 2 IN 0:
Check stage Q0163
For GP 4 IN 0:
Check stage Q0158
For GP 5 IN 0:
Check stage Q0160
For GP 6 IN 0:
Check stage Q0150
For GP 6 OUT 0:
Check stage Q0150
For GP 8 IN 0:
Check stage Q0152
For GP 8 OUT 0:
Check stage Q0152
If no defective component was found,
replace the controller.
Tetra Com Script for GPIO Test
TEST_ENTER
DELAY 18
Check for "Radio HW is READY"
MODE IDLE
HWCHECK_M GPIO_GO
DELAY 0.1
HWCHECK_M GPIO_READ
OK
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