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September 23, 2009

内蔵FDD(カードリーダー複合型)のプチ改造

最近のM/BにはFDDコネクタが無くなる傾向にあり、FDDデバイスも
消えゆく運命にあるのかと思うとさびしい気がします。

自宅機のM/B、CPUのリプレースを行う際に、搭載ドライブは換えない
という方向においては、FDD I/Fが無いという問題が残りました。
#FDD I/FのあるM/Bを選べばよいのではという突っ込みはなしです。

よくみられる、カードリーダー+FDDの3.5inch内蔵デバイスである。
Fdd0

この接続にはUSBと、レガシーFDD I/F(34pin)が必要なのだが
最近のM/BにはFDD I/Fが存在しない。

ほとんど使わないFDDなら、外付けUSBタイプを新規購入しても
3千円程度で買えるじゃないかという意見もあるが、無視しよう。
ものつくりの楽しさは損得勘定ではないのだから。

さて、内蔵の複合型USBユニットはないかと探してみたが、どうやら
世の中には存在していないらしい。 
さらにFDDから他形式に変換するI/F類も無いということがわかった。

無ければ作ればよい、ということで作ってみた。

といっても、レガシーFDD I/F(34pin)のスリムFDDをUSBタイプの
スリムFDDに交換しただけなのでプチ改造程度といえる。


使った部品(全部手持ちの部品をばらして使いました)
1.3.5inch複合カードリーダー(今のPCに組み込んでいるもの)
 Y-E DATA YD-8V08

2.外付けUSB接続型FDDユニット
 TEAC FD-32USB
#ばらしてしまってから何なのだが
 仕事でやっぱり必要なので新規に調達しなければ。。

3.内部USB接続ケーブル
 SANWA TK-USB2
 

まずは、メインとなる本体である。 写真は換装前の状態で、上がFDDユニット。
スリムFDDに34pin+4pin電源のI/F基盤が組み合わさっていることが分かる。
Fdd1

FDDドライブを外した状態。 特に変わった構造はしていない。
Fdd2

換装するUSB接続FDDユニットの本来の姿;^^)
ケースの中はケーブルとFDDユニットがつながっているだけ。
FDD-USB変換はFDD内部のI/F基盤が担っているようだ。
Fdd5

FDDユニットを換装した後の状態。(ケーブルははずしてます)
基板用の専用コネクタ(といっても入手容易な部品)なので、
ケーブルを自作するのも難しくはなさそう。
Fdd3

ついているケーブル単体ではこんな感じです。
M/B側がPIN形式なので変換が必要ですが、
そこはなんとでもなるのでしょう。
作ったほうがスマートだし、「自作」という気がしますね。
これはアキバに行った時にでも部品揃えることにしましょう。

Fdd4


換装のポイントは、FDDが同一形状であることです。
特にFDDのレリーズボタンの位置や形状が同じでないと
元の筺体に収まらないことになります。

USB化するメリットとしては、4PIN電源が不要になること。
これで電源ケーブルが一本不要になるのでケース内部が
さらにすっきりしました。

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