User Guide

NPE-4
6 - Troubleshooting PAMS Technical Documentation
Page 6-22 ãNokia Corporation. Original
RF Fail
The problem is most likely RF related
if the following conditions are
fulfilled.
·
Module can be flashed and BER
Test can be initiated.
·
BER is above limit or no
connection to BT-Box
Visual soldering inspection Re-solder
N
ot OK
Re-flash BT only
Measure SYSCLK > 200 mVpp
Reference: 11pF probe.
N
ote: The measured result can depend
very much on the probe type.
Tip: If nessesary, measure a known
good prototype with the same probe.
O
K
Measure Vreg
»
2.8 volts
N
O
YES
VCTCXO or Buffer failure
See RF troubleshooting document
YES
N
O
Check VFLASH1 & L133
Replace MCM
Test points can be seen in the document “Baseband testpoints”.