Test
Test Coverage
Repair solution
Bluetooth Functional Test: BER test
with BT-Box or functional test with
other Bluetooth device
Bluetooth antenna circuit
Repair of Bluetooth antenna
circuit (including RF filter or
WLAN switch if fitted)
FM Radio Functional Test: Perform
scan for local radio stations and
check station list displayed on
phone
FM receiver antenna circuit
Repair of FM antenna circuit
(between BTHFMWLAN ASIC
and headset connector)
FM Radio Functional Test: Listen to
local radio station
FM receiver audio circuit
Repair of FM receiver audio
circuit (between BTHFMWLAN
ASIC and headset connector)
The self tests run from Phoenix software are used for fault diagnosis.
If Phoenix software is not available, the functional tests with phone accessories are sufficient to verify the
functionality of Bluetooth and FM radio receiver.
If Bob1.0M-b module has been replaced, the WLAN tuning must be performed to ensure that the
output complies with ETSI/ FCC legal limits.
Introduction to WLAN troubleshooting
The following problems can occur with the WLAN hardware:
Symptom
Problem
Repair solution
Unable to switch on WLAN on
phone user interface
Open circuit solder joints or
component failure of BOB
module
Replacement of BOB module
or Host
Able to turn on WLAN via phone
user interface, but unable to
detect any WLAN APs or other
WLAN devices
Open circuit solder joints or
component failure of BOB
module or filter
Replacement of BOB module
or filter
Able to turn on WLAN via phone
user interface and find APs and
other WLAN devices, but not able
to connect
Problem with TX part of WLAN
circuit
Replacement of BOB module
Slow download speed when
using WLAN as connection
method
System clock possibly degraded Change system clock source
Users may experience the following problems resulting in functional phones being returned to the repair
centre:
Symptom
Problem
Repair solution
WLAN does not operate as desired
with another WLAN device
Other WLAN device is not
conforming to ETSI/FCC
specifications
Use only certified WLAN
products
RM-626
BB Troubleshooting and Manual Tuning Guide
Page 3 – 60
COMPANY CONFIDENTIAL
Issue 1
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