User Guide

CCS Technical Documentation Baseband Troubleshooting Instructions
RH-12/RH-28
Issue 1 02/04 Nokia Corporation Page 39
Volume Key Failure
Volume Up key
working?
Check S320 and Row4
line. If Ok, change Z300. If
it still fails, change
TikuEdge
No
Change TikuEdgeYes
Measure Row4
line from S320 Is it
~1,8 V?
Measure Col1 from
S320 when pressed. Is
there a 50 u pulse?
Check S320 and Col1 line.
If Ok, change Z300. If it
still fails, change TikuEdge
Yes
No
Check S321 and Row4
line. If Ok, change Z300. If
it still fails, change
TikuEdge
No
Change TikuEdgeYes
Measure Row4
line from S321 Is it
~1,8 V?
Measure Col2 from
S321 when pressed. Is
there a 50 u pulse?
Check S321 and Col2 line.
If Ok, change Z300. If it
still fails, change TikuEdge
Yes
No
Volume Down
key working?