1508i(RM-430)
RF Description and Troubleshooting
NokiaCustomerCare
Issue 1
Copyright © 2008 Nokia, All rights reserved
Tx Path Troubleshooting
No No No
yes
No
yes
No
yes
No
yes
No No
yes
No
yes
No
yes
No
yes
Notes:
• CBP5.6 is underfilled and can not be replaced.
• The shield case can not be reused after removal.
• After using the heatgun, the domesheet needs to be replaced
• U109 is PA, it is need special tool to reheat it.
Tx path faults
Measure DC test points
at table 1,is it OK?
Measure Tx RF test point
2 at table 2, is it OK?
Measure Tx RF test point
3 at table 2, is it OK?
Measure Tx RF test point
4 at table 2, is it OK?
Measure Tx RF test point
5 at table 2, is it OK?
If RF antenna feed point pad
obstructed, clean the pad,
connect system simulator to the
MS antenna, is it OK?
Tx troubleshootin
finished
Check ACT5805,
CBP5.6
Reheat solder joints of
ACT5805
Measure Tx RF test point
1 at table 2, is it OK? Rehear solder joints of c244
Reheat L205 and reheat SA9562
Reheat the solder joints of C101,D201
Reheat the solder joints of U109 Chan
e U109
Reheat the solder
oints of C113, U101
Measure Tx RF test point
6 at table 2, is it OK? Reheat the solder
oints of R107, U107
Reheat the solder joints of L123, C120
Check antenna module
