Replacing Phonomena BPS Batteries

日本に正規輸入されていないフォノイコライザ Musical Surrounding Phonomena と専用バッテリ電源キットを海外から中古で 購入 してから 5年以上が経過。さすがに充電式バッテリ電源ユニットもヘタってきたので、内部の充電池を交換。

Over five years have passed since I bought a second-hand set of Musical Surroundings Phonomena (and a companion Battery Power Supply unit) – nowadays BPS doesn’t work as expected, and it seems the rechargable batteries (in the BPS unit) have to be replaced.


[Phonomena + BPS]

Musical Surroundings Phonomena (top) and Battery Power Supply unit (bottom)

中で使われているバッテリは、ニッケル水素電池 AA (単3) 8個パックが 2つ。秋葉原で探せば同様の業務用パックは入手可能だとは思います。が、今回は安直に製作者の Michael Yee さんにメールで相談してみました。その結果、とてもフレンドリーなやりとり (雑談も楽しかったですが) の後、本来ならば Musical Surroundings 社から購入すべきところ、日本には正規代理店がないということで、Michael さんが郵送してくれることになりました。

The Phonomena BPS uses two 8 cell AA NiMH packs. Maybe I can find equivalent third-party alternatives in Akihabara, but this time I e-mailed Michael Yee-san to ask for some good advice. After exchanging very friendly e-mails (including interesting chats), Michael-san kindly mailed me the battery replacement kit to Japan (as there is no authorized reseller of Musical Surroundings product in Japan).


現在は NiMH AA 8セルパック x 2 ではなく、8セルパック + 7セルパックに変更しているそうです。ともあれ、やるべきことは大したことではありません。筐体をあけて、古いバッテリを外して、新しいバッテリを装着するだけです。

Instead of previous configuration (as mine), two NiMH AA 8 cell packs, Michael-san sent me one 8 cell pack and one 7 cell pack (“due to chemistry changes” according to Michael Yee-san). Anyway the replacement procedure is simple enough – open the BPS chasis, removing old batteries, and installing new batteries.


バッテリモード (緑色ランプ点灯)、急速充電モード (オレンジランプ点灯)、細流充電モード (消灯) のいずれも意図した通り動作することを確認しました。購入当時同様、充電は1時間くらいで完了、バッテリ駆動モードでは4時間ほど使用できます。

After the installation, I confirmed all the BPS modes (battery mode, fast charging mode, trickle charging mode) worked fine as expected. Fast charging requires about an hour to get the batteries fully charged, while on the battery mode BPS runs as long as four hours.


[Phonomena BPS Battery Replacement Kit]

Phonomena BPS Battery Replacement Kit


[Inside the Pnohomena BPS]

Inside the Phonomena BPS – circuit board (left) and batteries (right)


[Old Pnohomena BPS Battery Packs]

Old Battery Packs (see the production year-date)


[New Pnohomena BPS Battery Packs]

New Battery Packs – 7 cell pack (top), 8 cell pack (bottom)



Musical Surroundings SuperNova II」に続く . . .


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