User Guide

PAMS Technical Documentation 6 - Troubleshooting
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Keypad
fault 2
Volume UP key
OK?
Check S301 with
Ohmmeter
S301 short?
Replace S301
If still fail
Keypad
fault 3
No
Yes
No
Yes
Replace Z300
If still fail->
UPP failure
Volume DOWN key
OK?
Replace Z300
If still fail->
UPP failure
Replace S302
If still fail
Check S302 with
Ohmmeter
S302 short?
No
Yes
No
Yes