TROUBLESHOOTING
Audio Internal Problems - Audio External Problems
SEMC Troubleshooting Manual
K630 - V640 - K660
Audio Internal problems
Fault Trace SW
Audio and FM Radio
Audio Loop test
Audio Input: Mic1
Loop Mode: Analog
Audio Output:
Earphone
Apply Audio Loop
Whistle into the
PBA Mic
SL 5 Replace
N2000
SL 4 Escalate
Yes
Replace
B3100
Yes
More than
100m Volt AC Pk-Pk at
MP 4 (L3103 BEARP)
and MP 5 (L3104
BEARN)
No
2.2 Volt DC
At MP 39 (R3131)
No
More than
100mVolt AC Pk-Pk at
MP 108 (TP3101)
Fault Trace SW
Audio and FM Radio
Audio Loop test
Audio Input: Mic1
Loop Mode: Analog
Audio Output:
Loudspeaker
Apply Audio Loop
Whistle into the
PBA Mic
More than
100mVolt AC Pk-Pk
At MP 50 (X3102) and
MP 51 (X3103)
Yes
No
No
SL 5 Replace
N2000
SL 4 Escalate
More than
100m Volt AC Pk-Pk
at MP 3 (X3100) and
MP 2 (X3101)
Yes
No
SL 4 Replace
V3101 or V3102
SL 5 Replace
L3103 or L3104
1.9 Volt DC
At MP 50 (X3102)
and MP 51
(X3103)
Yes
No
Go to
Audio External
Problems
No
Are any of
V3105, V3106
C3137 and C3123
short circuit
No
SL 4 Replace
V3105 or V3106
SL 5 Replace
C3137 or C3123
Replace
N3100
Yes
More than
100mVolt AC Pk-Pk
At MP 44 (C3137) and
MP 45 (C3123)
No
Yes
1.9 Volt DC
At MP 48 (TP3104)
and MP 53 (TP3105)
No
Yes
Yes
SL 5 Replace
D2000
SL 4 Escalate
1.8 Volt DC
At MP 27 (R3137
AMPCTRL)
Yes
No
START
Step 1: Perform
System Connector Protection Test
Step 2:
Use TRS Fixture connect Display and
Keypad. Connect VBATT and perform
Audio Service Tests. If all Audio
Service Tests working properly at the
fixture then replace Loudspeaker or
Earphone
If not then
Load ITP SW into the phone.
Use TRS Fixture.
Connect VBATT and DCIO/SEPI
and continue with the Audio internal
problems TRS guide
No
2.6 Volt DC
At MP 121 (V2420)
Yes
Replace
N2400
SL 5 Replace
L3108 and L3109
SL 4 Escalate
Replace
V2405
No
Are any of
V3103 and V3104
Short circuit
Replace
V3103 or V3104
Yes
Fault Trace SW
Logic
GPIO Manager
Access:
Set GPIO_07 to Low
Application:
Set GPIO_01 to Low
0 Volt DC
on both side
of MP 7 (R2456)
SL 5 Replace
D2000
SL 4 Escalate
No
0 Volt DC
At MP 17
(V2405_ Pin 3)
Yes
2.6 Volt DC
At MP 17
(V2405_Pin 3)
Yes
Yes
No
SL 5 Replace
R2440
SL 4 Escalate
START
Step 1: Perform
System Connector Protection
Test
Step 2:
Load ITP SW into
the phone.
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
Fault trace SW
Audio and FM Radio
Audio Loop Test
Audio Input: AUX1
Loop Mode: Analog
Audio Output:
AUX Earphone
Apply Audio Loop
Replace
L2403 or L2404
Can you
hear at AUX
earphone when you
speak into the
AUX mic
No
More than
100mV AC Pk-Pk at MP
124 (C3124 MICP_int)
and MP 110 (C3125
MICN_int)
Yes
More than
100mV AC Pk-Pk
At MP 117 (L2403 SPL)
and MP 118 (L2404 SPR)
When whistle in to the
AUX mic
Are any of
L2403 or L2404
damaged
No
Yes
Replace
System Connector
X2400
Yes
No
Disconnect
DCIO/SEPI cabel
Insert PHF set
Talk into the AUX
mic
Is MP 116
(X2400_Pin 4)
connected to MP 114
(L2402)
No
Yes
Is MP 115
(X2400_Pin 3
connected to MP 113
(L2401)
No
Yes
No
Flash the phone
with EMMA
SUCR SW
Yes
Yes
L2401
Ok
Replace
L2401
L2402
Ok
Replace
L2402
No
No
Yes
Audio Internal
Tested
Go to
Audio Internal
problems
Yes
No
More than
100mV AC Pk-Pk At
MP 125 (C3113) and
MP 101 (C3120)
Replace
N3101
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
Replace
System Connector
X2400
Replace
N3101
2.2 Volt DC at
MP 75 (C3169)
Yes
SL 5 Replace
N2000
SL 4 Escalate
No
Replace
System Connector
X2400
Audio External problems
1215-3608 rev. 1
16
(96)
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