Troubleshooting Chart 1-12, Gpio - Motorola MCS 2000 Service Instructions Manual

Troubleshooting Chart 1-12, GPIO

Check cable
No
used to interface
to the radio
Repair or replace No
defective device
Repair or replace No
defective device
Repair or replace No
defective component
9-28 Troubleshooting
CHART 1-12 GPIO
Input
Are
J0403-7,8,16,
20, 21 at the right
voltage
(0 or 5V)?
Yes
Are
VR0424,VR0425,
VR0426,VR0429,
VR0430,VR0431
OK?
Yes
Are
Q0414, Q0416,
Q0418, Q0420,
Q0422, Q0424
OK?
Yes
Are
R0437, R0439,
R0440, R0443, R0444,
R0447, R0448, R0451, R0452,
R0455, R0456, R0459,
R0460, R0506
OK?
Yes
Check U0104
and for emergency
check U0510
START
Note: Verify RSS programming for
GPIO Output
Function?
Are
J0403-7,8,16,
20, 21 at the right
voltage
(0 or 5V)?
No
Are
VR0425,
VR0426, VR0429,
VR0430, VR0431
OK?
Yes
Are
Q0428, Q0429,
Q0417, Q0419,
Q0421, Q0423
OK?
Yes
Are
R0446, R0450,
R0454, R0458
OK?
Yes
Check
U0104
the GPIO function to be correct.
Check cable
Yes
used to interface
to the radio
No
Repair or replace
defective device
No
Repair or replace
defective device
No
Repair or replace
defective component