W995
1230-1858 rev. 1
TROUBLESHOOTING
T
R
O
UBL
ESHOOT
ING
Audio Jack Problems
START
Note !
Before starting this guide check that the Audio Jack Detection is Ok.
Step 1:
Replace Audio Jack and retest the Phone
If successful claim Audio Jack
If not go to step 2
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
Use Hands-Free (PHF) Set
Continue with the
Audio Jack Microphone Problems TRS guide
Yes
Replace
L3120
Is L3120
= Max 2 Ohm
No
Replace
N3104
Yes
1:
Use Fault Trace SW and go to:
Audio and FM Radio
Audio Loop Test
Audio Input:
AUX1
Loop Mode:
Analog
Audio Output:
Aux Earphone
Apply Audio Loop
2:
Disconnect: DCIO/SEPI from the PBA
3:
Connect the Hands-Free (PHF) Set into the X2405
and Blow into the
Hands-Free (PHF) Aux Microphone
Can you
hear anything from
the PHF Earphone
when blowing into
the PHF Mic
Go to
Hands-Free (PHF)
Aux Microphone
Problems TRS guide
No
Disconnect VBATT and the Hands-Free (PHF) Set
Remove PBA from the TRS Fixture
Audio Jack Microphone Problems
START
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Insert the Hands-Free (PHF) Set with 3.5mm Stereo Plug
into the TRS Fixture 3.5mm Audio Jack
Use Fault Trace SW
Continue with the
Audio Jack Output Problems TRS guide
1:
Use Fault Trace SW and go to:
Audio and FM Radio
Audio Tone
Activate:
INIT TONE TEST
Activate:
Audio Jack OUT
Note !
The Tone duration is only 2 sec, You should repeat this
test to ensure that the test result is correct.
Can you
hear a 1 kHz tone
from the 3.5mm
Stereo PHF Set
Output
Replace
Audio Jack
Yes
No
More than
400mV AC Pk-Pk
1 kHz signal at MP 39
(R3124) and MP 38 (R3127)
shortly after the test has
been activated
1.8 Volt DC
at MP 35 (R3123)
shortly after the test has
been activated
No
Replace
N2410
No
Replace
N3103
Yes
Are
L3134, L3135
L3121, L3122
= Max 2 Ohm
Yes
Replace
Faulty Component
No
Replace
N3104
Yes
Disconnect VBATT and DCIO/SEPI
Remove PBA from the TRS Fixture
Audio Jack Output Problems
SEMC Troubleshooting Manual
26
(125)
