PAMS Technical Documentation
Troubleshooting and Tuning Instructions
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Display fault 1
Display
faults
Set phone into local mode.
Start Display test with Phenix
Are the UI–module
led’s turned on ?
Try change UI module
Is it working now ?
No
Retest
Yes
Measure signal
from X303 pin. 2.
Is it 128 Hz
~3.3Vp–p ?
Check X303
Yes
Check R306 If OK.
Measure VBATT
from V300 pin. 4
Is it OK?
No
Check R304
and VBATT
line
No
Measure
PWM LED‘s
control signal from UEM
Is it 128 Hz
~3.8Vp–p ?
Yes
Check control
signal line if OK
Change UEM
No
Check R305,
V300, V329
and line
Yes
Display
faults 2
Yes
Check X303
No