Introduction To Wlan Troubleshooting - Nokia RM-596 Service Manual

Expected fault reports relating to the FMTx 2.1 implementation may consist of one or more of the following;
1 No left audio
2 No right audio
3 No audio
4 Can't start FMTx
5 Can't locate FM transmission on an FM receiver or no FM transmission
6 Distortion on audio
7 Poor reception on FM receiver
8 No RDS information
Initial fault analysis
Where possible, attempt to reproduce and verify the reported fault. Intermittent problems are likely to be
due to bad connections or broken components/solder joints. Any faults relating to poor FM transmitter
performance or frequent failure to locate usable frequencies when performing a scan are likely to be due to
some kind of antenna issues.
In handsets that utilise an antenna solution in a removable cover it is likely that the connecting interface
pins are either damaged, dirty or that the cover fits poorly perhaps due to broken tabs/latching lugs. Poor
audio fault reports may also be due to the above antenna issues.

Introduction to WLAN troubleshooting

The following problems can occur with the WLAN hardware:
Symptom
Unable to switch on WLAN on
phone user interface
Able to turn on WLAN via phone
user interface, but unable to
detect any WLAN APs or other
WLAN devices
Able to turn on WLAN via phone
user interface and find APs and
other WLAN devices, but not able
to connect
Slow download speed when
using WLAN as connection
method
Users may experience the following problems resulting in functional phones being returned to the repair
centre:
Symptom
WLAN does not operate as desired
with another WLAN device
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Problem
Open circuit solder joints or
component failure of BOB
module
Open circuit solder joints or
component failure of BOB
module or filter
Problem with TX part of WLAN
circuit
System clock possibly degraded
Problem
Other WLAN device is not
conforming to ETSI/FCC
specifications
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BB Troubleshooting and Manual Tuning Guide
Repair solution
Replacement of BOB module
or Host
Replacement of BOB module
or filter
Replacement of BOB module
Change system clock source
Repair solution
Use only certified WLAN
products
RM-596
Issue 2