User Guide

CCS Technical Documentation Baseband Troubleshooting Instructions
RH-12/RH-28
Issue 1 02/04 Nokia Corporation Page 21
USB Data Transmission Failure
Attach phone via DKU-2
cable. Display shows: 'Data
enhancement connected' ?
USB host detected.
Retest USB interface
USB failing
No
Yes
No
Yes
Measure Vbus @
C109
Is it ~5 V?
Check Pop Port X102
(soldering joints & spring
contacts) or Z101, R106 &
R108
Retest USB interface
Measure startup sequence for:
V
bus
,D+,D- @ C109,J105,J106
Compare to screenshot
Similar startup sequence
Check USB2 ASIP
R107,Z101,R106,R108
Retest USB interface
Fail
Ch.1: D+, Ch.2: D-, Ch.3: V
bus
Measure startup sequence for:
Vbus,D+,D- @ C109,J110,J109
(1,8 V logic levels)
Compare to screenshot
Similar startup sequence
Change NUT N100.
Retest USB interface
Fail
Change TikuEdge