THE INDUS GT DISK DRIVE 5-24-2012.
THE INDUS GT DISK DRIVE latest updates and/or corrections 5-24-2012 This drive is a clone of the 1541 and uses a single-sided DD mechanism. Without a fastload cart, it runs about the same R/W speed as a 1541. It does have some enhancements such as a front panel readout of the disk track, a metal case and an external 12V 2Amp power supply for less internal case heating. The drive mechanism is a Chinon F-051 which I had never seen before. It appears similar to the ones used in the MSD disk drives although the PC boards on this mechanism are different, and it has a push-down door assembly. It's quite different than the ALPS and Newtronics mechanisms that Commodore used for their 1541. There are three 8K (2764) EPROMs for the DOS and system control. They are listed as U17 (CS=19E0), U18 (CS=56C0) and U19 (CS=29A0). One problem I discovered with this mechanism, and that I would expect to see again on other Indus drives, is that the head assembly would not retract all the way back to track 0. The metal shield on the underside of the head had warped downward and was hitting the chassis. That shield appears to be held in place with only double-sided tape. To remove that shield, the drive would have to be taken completely apart. Rather than that, I simply lifted up the shield a bit and put a dab of silicone rubber sealer between the shield and the head, then applied some pressure on the shield until the glue set up. That fixed it. Another problem: the cheap connector used on the R/W head cable came apart when I re-inserted it onto the connector on the PC board. To be specific, the connectors got pushed out the rear of the plug when I put it back on. I had to press them back into place with a sharp tool afterwards. There are three connectors on the side of the drive that must be reconnected correctly, so I made a note (and took photos) of where they went before removing them. Ray