この機種には上下に合計４個のスピーカーがあります
下の２つのスピーカーの配線は目視でわかりますが、
上のスピーカーはボリュームをつける場所がわかりません
This machine has four loud speakers.
We can know the wiring of two loud speakers
attached at underside by our visual observation
soon.
However, upper two loud speakers wirings are
difficult to find.
横の４０Pのコネクターを半分抜くようにすると音が
消えました
When we tried to release the 40P connector a little,
the sound was stopped.
どうも、この辺に配線が有りそうです
The wiring of loud speakers seems to be
existence at hereabout.
オシロスコープで、可能性のあるところの波形を
調べます。
音声に関係のない配線では波形に変化がありま
せん。
We investigated the place that seemed to be
possibility by the oscilloscope.
We were not able to watch the wave style of
the changing at unrelated position of the sounds.
「扉が開いています」の警告音にあわせて波形が
変化するところが２本見つかりました。
ここが、上のスピーカーの配線です。
We were able to find the wave style changing at
two positions. It synchronized with the alert
message " Door is opened"
We can understand that this is the upper loud
speaker wiring.
ボリュームを取り付けて完成。
めでたし、めでたし。
We finished it completely by attaching the
variable resistance.
And lived happily ever after.
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