User Guide

NPE-4

6 - Troubleshooting PAMS Technical Documentation

Page 6-8 ãNokia Corporation. Original

Power doesn’t stay on, or phone is jammed

If this kind of failure is presenting itself immediately after FLALI, it is most likely caused

by ASICs missing contact with PWB.

If for some reason the MCU does not service the watchdog register within the UEM, the

operations watchdog will run out after approximately 32 seconds. Unfortunately, the

service routine can not be measured.

Flash programming doesn't work

If fault information from Prommer is:

Phone doesn't set FBUS_TX line low

Check the connections:

X100 p11 - R101

X100 p12 - R104

X100 p13 - R100

Connection ok?

Yes

Try reading MCU ID

with Phenix

Reading ok?

Solder / replace faulty

component

Replace either UEM or UPP

Try reading Flash ID with

Phenix

reading ok?

Yes

Flash again

Yes

Flash programming

Replace Flash