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Updated changes to reflect new static layout

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Bastian de Byl
2019-07-24 13:36:57 -04:00
parent 18d4285f38
commit 30d90545bf
7 changed files with 64 additions and 43 deletions
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16
content/post/headphone-fix.md
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@@ -17,7 +17,7 @@ side, I figured the only way *in* was lifting the mesh cover off. So I went at
it, carefully, with a pair of tweezers. I worked my way around the edge and
wedged the mesh upwards.
{{< thumb src="/img/headphone-fix/IMG_7505.jpg" >}}
{{< thumb src="/static/img/headphone-fix/IMG_7505.jpg" >}}
# Okay, Maybe Turn It On
@@ -30,8 +30,8 @@ right speaker put out no sound._ I checked the known-good left speaker using my
wanted to find out what to expect when troubleshooting the right channel.
{{< thumbgallery >}}
{{< thumb src="/img/headphone-fix/IMG_7506.jpg" sub="Left Speaker" >}}
{{< thumb src="/img/headphone-fix/IMG_7511.jpg" sub="Right Speaker" >}}
{{< thumb src="/static/img/headphone-fix/IMG_7506.jpg" sub="Left Speaker" >}}
{{< thumb src="/static/img/headphone-fix/IMG_7511.jpg" sub="Right Speaker" >}}
{{< /thumbgallery >}}
Knowing what to expect on the oscilloscope, I hooked up the probe to the right,
@@ -44,7 +44,7 @@ disconnected at this point in time to ease the troubleshooting process.
Lucky for me the PCB pads were labeled -- even better `SPKL+` (_left_) and
`SPKR+` (_right_) were easy to find.
{{< thumb src="/img/headphone-fix/IMG_7507.jpg" >}}
{{< thumb src="/static/img/headphone-fix/IMG_7507.jpg" >}}
Outside of the bluetooth board hidden under the piece of tape, there's not a
whole lot going on in the circuit. It was my guess that the visible surface
@@ -53,13 +53,13 @@ search of `AIWI TI` (_as shown in the photograph_) resulted
in [the following datasheet](http://www.ti.com/lit/ds/symlink/tpa6132a2.pdf)
which verified that to be the case.
<center>![Hello](/img/headphone-fix/TPA6132A2.png)</center>
<center>![Hello](/static/img/headphone-fix/TPA6132A2.png)</center>
**Bingo!** Now knowing the pinout, I could use my trusty multimeter (_a Fluke
115_) to test continuity of the circuit from the known-good and the now
known-bad speaker traces back to the `OUTL` and `OUTR` outputs of the amplifier.
{{< thumb src="/img/headphone-fix/IMG_7514.jpg" >}}
{{< thumb src="/static/img/headphone-fix/IMG_7514.jpg" >}}
Removing the board from the housing required a bit of finesse. I didn't want to
bother desoldering the left speaker connections to make removal easier. So, with
@@ -83,7 +83,7 @@ Using the 3.5mm mini-jack's solder pads, I found continuity to be true from the
chips left and right outputs to the conveniently accessible solder pads. _A
bodge wire was in order_..
{{< thumb src="/img/headphone-fix/IMG_7515.jpg" sub="Note the bodge wire" >}}
{{< thumb src="/static/img/headphone-fix/IMG_7515.jpg" sub="Note the bodge wire" >}}
# All's Well That Ends Well
@@ -92,7 +92,7 @@ pin to `SPKR+`. Lo and behold it was now closed-circuit! I was very happy to see
the expected waveform from the known-good left channel now also appearing on the
right channel.
{{< thumb src="/img/headphone-fix/IMG_7516.jpg" >}}
{{< thumb src="/static/img/headphone-fix/IMG_7516.jpg" >}}
At this point I quickly re-soldered the wires to the speaker and enjoyed music
now coming into both ears!