At last Saturday's FCUG meeting, we opened up the Blue Chip 128 drive. Member Louis M. had the honor of disassembling the drive. Though the outside of the drive was grungy and yellowed, the interior of the drive was clean. First, we noticed the quality of the hardware and how compact the drive was in comparison to a 1571 drive. On the casing, there were machine screws with lock washers. When the top of the casing was removed, we saw that the entire top of the mechanism was covered by a solid, shiny, metal plate held in place by metal columns to the bottom of the casing. When the plate was removed, the main motherboard was revealed.
Ah-ha, the board had been worked on! There was a CMD JiffyDOS v5.05 chip installed. However, when Louis looked at the underside of the board, he had bad news. There was a scorch mark. High heat had burned the board in one spot. We looked at the top of the board again and noticed that the scorch led to a lifted trace and a resistor. Perhaps that was the reason that the drive did not respond to any disk command. It will have to go to Ray Carlsen for repair.