C905
1222-9526 rev. 1
TROUBLESHOOTING
Bluetooth Problems
TROU
B
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E
S
H
O
OTIN
G
- WLAN Problems
START
Step 1:
Flash the Phone with
EMMA SUCR SW
and retest the Phone
If successful
claim SUCR SW Flash
If not go to step 2.
Step 2:
Continue with the
Bluetooth Problems TRS guide
Max
0.5 Ohm between
MP 29 (X1500_Pin 1) and
MP 23 (X1500_Pin 2)
Replace
X1500
No
Yes
1:
Load ITP SW into the Phone
2:
Disconnect: WLAN/BT
Antenna from the X1530
3:
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
4:
Connect RF Cable Flexible
with SMK RF Probe to
Spectrum Analyzer instrument
5:
Use Fault Trace SW
Spectrum Analyzer
Instrument Settings:
Frequency: 2402 MHz
Span: 10 MHz
Amplitude: 10 dBm
Use Peak Search (MKR)
Connect SMK RF Probe to
X1500 RF Connector on PBA
Fault trace SW Settings:
TX and RX
Bluetooth
Channel 0
Set MaxPwr MOD 0
NOTE!
Remember the Frequency
Is the
Blt MaxPwr MOD 0
0 dBm
(
±2 dBm)
Yes
Fault trace SW Settings:
TX and RX
Bluetooth
Channel 0
Turn Off
(This must be done before next
step)
Set MaxPwr MOD 1
NOTE!
Remember the Frequency
Is the
Blt MaxPwr MOD 1
0 dBm
(
±2 dBm)
Is MP 21
(X1530_Pin 1)
Short circuit to the PBA
GND (Shield
Can Fence)
Yes
Replace
X1530
No
Replace
WLAN/BT_Antenna
or X1530
Yes
Replace
N1300
No
Change the
Bluetooth channels
from ch 0 to ch 78 by using the
Fault Trace SW and test
TX Output Power
Use:
Spectrum Analyzer
Span 170 MHz
BW: Auto
Amplitude: 10 dBm
Connect SMK RF Probe to
X1500 RF Connector on PBA
NOTE!
Use Peak Search when
changing the channel to get
correct TX Power value
NOTE!
1 MHz channel spacing
Is
MOD 1 Freq.
minimum 230 KHz
higher than
MOD 0 Freq.
No
Yes
Is the
TX Output Power
for all channels
0 dBm
(
±2 dBm)
No
Yes
Disconnect
SMK RF Probe
and connect RF Probe to
Spectrum Analyzer instrument
NOTE! Do not use 10:1 Divider
Frequency: 2402 MHz
Span: 10 MHz
Amplitude: 10 dBm
NOTE!
Use Peak Search (MKR)
to get correct TX Power value
No
0 dBm at
MP 48 (C1502
BT_ANT)
(
±2 dBm)
Replace
N1510
Yes
0 dBm at
MP 28 (W1300_Pin 3)
and MP 27 (W1300_Pin 4)
(
±2 dBm)
No
SL 5 Replace
W1300
SL 4 Escalate
Yes
2.7 Volt DC at
MP 26 (ST1302
VBT27)
No
SL 4 Replace
N1300
SL 5 Replace
N2000
No
26 MHz Signal
At MP 22 (ST2106
BT_CLK)
Yes
No
SL 4 Replace
N1300
SL 5 Replace
N2100
Replace
N1300
SL 5 Replace
N2010
SL 4 Escalate
Yes
Bluetooth Problems
START
NOTE !
This TRS guide is NOT valid for
C905c Phones
Step 1:
Flash the Phone with
EMMA SUCR SW
and retest the Phone
If successful
claim SW Flashing
If not then go to Step 2.
Step 2:
Continue with the
WLAN Problems TRS guide
Max
0.5 Ohm between
MP 29 (X1500_Pin 1) and
MP 23
(X1500_Pin 2)
Replace
X1500
No
1:
Load ITP SW into the Phone
2:
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
3:
Connect RF Cable Flexible
with SMK RF Probe to
Spectrum Analyzer instrument
4:
Use Fault Trace SW
NOTE!
The WLAN/BT_Antenna
must be connected to X1530
Yes
Spectrum Analyzer
Instrument Settings:
Frequency: 2442 MHz
Span: 10 MHz
Amplitude: 20 dBm
Use Peak Search (MKR)
Connect
SMK RF Probe to
X1500 RF Connector on PBA
Fault trace SW Settings:
TX and RX
WLAN
Wlan Settings
WLAN Turn On
Is WLAN
TX Output Power
13 dBm
(
±5 dBm)
Yes
Replace
WLAN/BT_Antenna
or X1530
1:
Disconnect:
SMK RF Probe from the PBA
and from the Spectrum Analyzer
instrument
2:
Connect: RF Probe to the
Spectrum Analyzer instrument
NOTE! Do not use 10:1 Divider
Use Peak Search (MKR) and
Measure
WLAN TX Output Power
on top of the N1500 component
NOTE!
Do NOT touch the N1500
component with the RF Probe
to avoid component damaging
No
Is there
any signal
at MP 47 (N1500)
Yes
3.3V – 3.5V DC
At MP 46 (ST2310
WLAN_VO33)
Replace
N1510
Yes
No
Replace
N2300
1.8 Volt DC at
MP 85 (R2313
WLAN_PDn)
No
Replace
N2410
No
Yes
Check the Following Voltages:
1.9V DC at MP 45 (ST2311)
1.8V DC at MP 44 (ST2312)
3.0V DC at MP 43 (ST2313)
Are the
voltages
Ok
Replace
N2300
No
26 MHz Signal
At MP 24 (ST2105
WLAN_CLK)
Yes
No
1.8V – 2V DC at
MP 50 (V2100_Pin 1
WLAN_CLKREQ)
Yes
Is
MP 49 (V2100_Pin 3)
Short circuit to the PBA
GND (Shield
Can Fence)
SL 5 Replace
N1500
SL 4 Escalate
No
No
SL 5 Replace
V2100
SL 4 Escalate
Yes
SL 5 Replace
N2100
SL 4 Escalate
Yes
Is the
WLAN
Problem solved
Claim Componenet
N2100
Yes
SL 5 Replace
N2010
SL 4 Escalate
No
WLAN Problems
SEMC Troubleshooting Manual
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