Tx Path Troubleshooting - Nokia 7088 Troubleshooting Manual

7088 (RM-219)
RF Description and Troubleshooting

Tx path troubleshooting

Tx path
Faults
Measure DC test
points at Table 1. Is
it OK?
YES
Measure Tx RF test
points 5
at Table 2. Is it OK
YES
Measure Tx RF test
points 1
at Table 2. Is it OK
YES
Measure Tx RF test
points 2
at Table 2. Is it OK
YES
Measure Tx RF test
points 3
at Table 2. Is it OK
YES
Measure Tx RF test
points 4
at Table 2. Is it OK
YES
If RF Antenna feed point pad
obstructed, clean the pad. Connect
System Simulator to MS antenna. Is it
OK
Note:
•
MSM6025 is underfilled and cannot be replaced.
• Memory IC is underfilled and cannot be replaced.
• The Baseband Shield Cover Assy and RF Shielding Cover cannot be
reused after removal.
• After using the heatgun, domesheet is recommended to be replaced.
Page 10 © 2006 Nokia Corporation
NO
Check PM6610, MSM6025
Rehear solder
NO
joints of C836
NO
Change RFT6122
NO Reheat solder joints of C837, FL600, C619, U7
Reheat solder
NO
NO
joints of U7
Reheat solder joints of F601,
NO
c606,S601
NO
NO Reheat solder joints of PM6610
Change U7
Check Antenna Module
Company Confidential Issue 1 11/2006