What DuoDisk mods are necessary?
The following is excerpted from an info file from my old bbs … There are TWO modifications that should be made to Duodisk drives: The First one was recommended by Apple several ago to solve occasional problems with trashing diskettes. The solution is to remove 2 capacitors. The Second modification is only required to solve a problem with daisy-chaining on the GS Smartport, though the modified Duodisk will still work fine on older Apple II’s. It requires removing a resistor. DUODISK MODIFICATION #1- REMOVAL OF TWO CAPACITORS This mod should be done on ALL Duodisks, no matter whether they’re used on //e’s, IIGS’s, etc. The problem was that diskettes would sometimes be damaged when doing an Open-Apple-CTL-Reset or when using disks with certain kinds of copy protection. The mod was in an Apple dealer service bulletin several years ago for “analog board PN 676-[]101 or 676-[]102.” The Analog board is the one inside Drive 1 in the Duodisk. You may have to unplug the cable near the back rig
