Page 255 - CITS - Electronic Mechanic - TT - 2024

ELECTRONICS MECHANIC - CITS

6 If all those mentioned lines above is all in good condition you may now proceed to suspect the EMI-Fiter is
having a problem or faulty. You then now remove it from the Printed circuit board then do a line check up from
the mouthpiece terminal to that EMI-filter terminal bumps where it is being connected.
You can refer to the schematic diagram for each terminal specification. You may now can check the IC itself by
analyzing the internal circuitry inside it. I advice just replace a good and working one if not so sure about.

It this step is most complicated job to do with, specially for beginners.This is one of advance troubleshooters skills.
If found all of those line paths and components above were in good conditions. The last part is to work a power
management IC itself for the audio codec circuit is also within that chips.

Now, if the last and final suspected parts is the chips, you must need to rework it, Reheating it the first will do and
might as well also work. But if the problem still remain, Reworking it is the best advice that suites out.

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CITS : E & H - Electronics Mechanic - Lesson 130 - 145