Sony Ericsson W995 Troubleshooting Manual page 26

Audio Jack Microphone 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
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 No
when blowing into
the PHF Mic
Yes
Disconnect VBATT and the Hands-Free (PHF) Set
Remove PBA from the TRS Fixture
Replace Is L3120
Yes No
N3104 = Max 2 Ohm
TROUBLESHOOTING Audio Jack Problems
Go to
Hands-Free (PHF)
Aux Microphone
Problems TRS guide
Replace
L3120
Audio Jack Output Problems
Insert the Hands-Free (PHF) Set with 3.5mm Stereo Plug
into the TRS Fixture 3.5mm Audio Jack
Audio Jack Output Problems TRS guide
Note ! The Tone duration is only 2 sec, You should repeat this
test to ensure that the test result is correct.
1.8 Volt DC
Replace
at MP 35 (R3123)
No No
N2410
shortly after the test has
been activated
Replace
Yes
N3103
SEMC Troubleshooting Manual
START
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
Continue with the
1: Use Fault Trace SW and go to:
Audio and FM Radio
Audio Tone
Activate:
INIT TONE TEST
Activate:
Audio Jack OUT
Can you
hear a 1 kHz tone
Replace
from the 3.5mm Yes
Audio Jack
Stereo PHF Set
Output
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
Yes
Disconnect VBATT and DCIO/SEPI
Remove PBA from the TRS Fixture
Are
Replace
L3134, L3135
No
L3121, L3122 Faulty Component
= Max 2 Ohm
Replace
Yes
N3104
1230-1858 rev. 1
W995
26 (125)