Showing posts with label hands. Show all posts
Showing posts with label hands. Show all posts
Thursday, April 16, 2015
Nokia N97 Left and Right Ringer Hands Free Loud Speaker Solution
Heres the solution to those who are looking for a quick guide in repairing Nokia N97 left and right ringer, hands free loud speaker problem issues like there is no audio sound can be heard over it.
This solution can be applied if the device speaker is working okay but still there is no sound output can be heard on it. The solution below shows the Ringer or Loud Speaker Audio circuit. It indicates certain components that needs to be check and or replace if found faulty or damaged.
Check and ensure first that speaker is working or already tried installing a replacement spare on.
If the speakers were okay, you may then proceed to check those components showed on the solution above.
There are filter coils connected on the circuit, you may first check this components.
For the LEFT speaker problem , you may check that the flex cable is not damaged before trying to check or replace the filter coils. If all coils or inductors were okay, you may then try to rework or re-ball the audio amplifier chip or replaced it with a new one. If the audio IC is alredy replaced and all the filter coils were seems good, You may then suspect that the problem lies or power and audio IC (AVILMAS), reworking it might help solved and fix the problem.
This solution can be applied if the device speaker is working okay but still there is no sound output can be heard on it. The solution below shows the Ringer or Loud Speaker Audio circuit. It indicates certain components that needs to be check and or replace if found faulty or damaged.
Nokia N97 Left and Right Ringer Loud Speaker Repair Solution
Check and ensure first that speaker is working or already tried installing a replacement spare on.
If the speakers were okay, you may then proceed to check those components showed on the solution above.
There are filter coils connected on the circuit, you may first check this components.
For the LEFT speaker problem , you may check that the flex cable is not damaged before trying to check or replace the filter coils. If all coils or inductors were okay, you may then try to rework or re-ball the audio amplifier chip or replaced it with a new one. If the audio IC is alredy replaced and all the filter coils were seems good, You may then suspect that the problem lies or power and audio IC (AVILMAS), reworking it might help solved and fix the problem.
Wednesday, April 8, 2015
Nokia 5220XM Ringer Hands Free Loud Speaker No Sound Solution
Heres the solution for Nokia 5220 Xpressmusic Ringer and Integrated Hands Free (IHF) Speaker that No sounds output can be heard on it.
If ever encountered this problem, you need to check the earpiece speaker first if it already busted or damaged.
If the speaker is working okay but still there is no audio sound output can be heard when being activated, you may use this solution below to trace the line paths and check particular components on Nokia 5220 PCB board that holds the IHF speaker circuit. This solution covered for left and right channel speakers connection.
The IHF speaker left and right audio signal is feed from the power and audio IC (AVILMA) then filtered by a non polar capacitors before it feeds to the audio amplifier IC. The audio amplifier chip is the one that boosts or amplify the audio signals to make it sounds louder and better.
The boosted or amplified audio signal is then feeds across to a filter coils, bypass capacitors and an ESD protection resistors before it get through to the IHF Speakers.
Hints for Troubleshooting:
a) check the earpiece speaker first by using a multimeter.
b) clean the speaker terminals and contact pads.
c) check or replace the filter capacitors, filter coils and resistors if found damaged.
d) check the corresponding line paths of each corresponding connections
e) if all line paths and components is okay: Rework the audio amplifier IC or replace if it doesnt work.
f) If all of the above is already been done but does not solved the problem, You may then proceed to rework the audio IC.Trace the line paths to each corresponding solder ball bumps that holds for the IHF audio signals before in-placing it back.
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If ever encountered this problem, you need to check the earpiece speaker first if it already busted or damaged.
If the speaker is working okay but still there is no audio sound output can be heard when being activated, you may use this solution below to trace the line paths and check particular components on Nokia 5220 PCB board that holds the IHF speaker circuit. This solution covered for left and right channel speakers connection.
Nokia 5220 Xpressmusic Ringer and Hands Free Speaker No Sound Repair Solution
The boosted or amplified audio signal is then feeds across to a filter coils, bypass capacitors and an ESD protection resistors before it get through to the IHF Speakers.
Hints for Troubleshooting:
a) check the earpiece speaker first by using a multimeter.
b) clean the speaker terminals and contact pads.
c) check or replace the filter capacitors, filter coils and resistors if found damaged.
d) check the corresponding line paths of each corresponding connections
e) if all line paths and components is okay: Rework the audio amplifier IC or replace if it doesnt work.
f) If all of the above is already been done but does not solved the problem, You may then proceed to rework the audio IC.Trace the line paths to each corresponding solder ball bumps that holds for the IHF audio signals before in-placing it back.
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