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Audio Internal Problems
Is
SL 5 Replace
L3102, C3123 or
Faulty Component
No
No
R3119
SL 4 Escalate
Ok
SL 5 Replace
N2000
Yes
SL 4 Escalate
Is
L3100,L3101
SL 5 Replace
C3110,R3197,C3121,
Faulty Component
No
No
C3131,R3199,R3198
SL 4 Escalate
Ok
Replace
Yes
B3100
SL 5 Replace
Are any of
Faulty Component
Yes
C3139 and C3140
No
SL 4 Escalate
short circuit
SL 5 Replace
N2000
No
SL 4 Escalate
1.9 Volt DC
Replace
at MP 53 (C3107)
Yes
No
X4300
and MP 54 (C3108)
No
More than
100mVolt AC Pk-Pk
SL 5 Replace
at MP 87 (C3137) and
N2000
No
MP 88 (C3141) when
SL 4 Escalate
blowing into the
PBA Mic
Yes
SL 5 Replace
1.8 Volt DC
D2000
No
at MP 91 (R3101)
SL 4 Escalate
Replace
Yes
N3100
SL 5 Replace
R2440
No
SL 4 Escalate
Go to
2.0 V - 2.6 V DC
External Audio
Yes
at MP 62
Yes
Problems
(V2420_Cathode)
TROUBLESHOOTING
START
If Loudspeaker or Earphone problem
follow step 1, 2 and 3.
2.2 Volt DC
If Mic problem follow step 1 and 3.
At
Step 1:
MP 99 (L3102)
Perform
System Connector Protection Test.
If successful go to step 2.
Step 2:
Yes
Replace Camera Flex Module and
retest the phone. If successful claim
Camera Flex Module
If not then go to step 3.
More than
Step 3:
100mVolt AC Pk-Pk
Load ITP SW into the phone.
At MP 98 (L3100) when
blowing into the
Use TRS Fixture.
Connect VBATT and DCIO/SEPI
PBA Mic
and continue with the
Audio internal problems TRS guide
Yes
No
Fault Trace SW
More than
Audio and FM Radio
100mVolt AC Pk-Pk
Audio Loop test
At MP 50 (C3139) and
Audio Input: Mic1
MP 49 (C3140) when
Loop Mode: Analog
blowing into the
Audio Output: Earphone
PBA Mic
Apply Audio Loop
Blow into the
Yes
PBA Mic
Replace
X4300
Can you hear
anything from the
Earphone
Can you hear
anything from the
Loudspeaker
Yes
Fault Trace SW
Yes
Audio and FM Radio
Audio Loop test
Fault Trace SW
Audio Input: Mic1
Logic
Loop Mode: Analog
GPIO Manager
Audio Output: Loudspeaker
Access
Apply Audio Loop
Set GPIO_03 to Low
Blow in the
Application
PBA Mic
Set GPIO_01 to Low
Access
GPIO_02 Read
SL 5 Replace
0 Volt DC
No
D2000
at MP 94 (R2435)
SL 4 Escalate
Yes
0 Volt DC
Replace
at MP 93
No
N2400
(V2405_Pin 5)
Yes
2.6 Volt DC
at MP 92 (V2405_Pin 3)
Replace
No
and Result GPIO_02
V2405
= LOW
Audio Internal Problems - Audio External Problems
Audio External Problems
Fault trace SW
Audio and FM Radio
Disconnect
Audio Loop Test
DCIO/SEPI cabel
Audio Input: AUX1
and Insert PHF set
Loop Mode: Analog
Blow into the
Audio Output:
AUX Mic
AUX Earphone
Apply Audio Loop
Can you
hear anything at
Audio Internal
AUX earphone when
Yes
blowing into the
AUX Mic
No
More than
100mV AC Pk-Pk
L2403 and L2404
at MP 64 (L2403 SPL) and
Yes
MP 63 (L2404 SPR) when
blowing into the
AUX Mic
No
More than
100mV AC Pk-Pk at
Than 100mV AC Pk-Pk
MP 122 (C3124 MICP_int)
at MP 118 (C3113) and MP
and MP 121 (C3125
Yes
120 (C3120) when blowing
MICN_int) when
blowing into
the AUX Mic
No
2.2 Volt DC at
Yes
MP 123 (C3119)
SL 5 Replace
No
SL 4 Escalate
SEMC Troubleshooting Manual
START
Step 1:
Perform System Connector
Protection Test.
If successful go to step 2.
Step 2:
Load ITP SW into the phone.
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
Use Fault Trace SW
Go to
No
Audio Internal
Tested
Problems
Flash the phone
Yes
with
EMMA SUCR SW
Replace
No
Max 2 Ohm
L2403 or L2404
Replace
Yes
System Connector
X2400
More
SL 5 Replace
No
N2000
SL 4 Escalate
into the
AUX Mic
Replace
Yes
N3101
Replace
N3101
N2000
1217-3942 rev. 1
W890
16
(119)
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Table of Contents
Troubleshooting
