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August 06, 2005
Fun with Akai MPC-60 floppy drives
Turned on my Akai MPC-60 this past week and the floppy drive was dead. The original drive was a long discontinued 720k Mitsubishi. Opening up my other Akai gear I discovered Teac FD-235HF models. Doing some snooping around the net it turns out there were more than a dozen variations of this drive, however Teac still makes one model that should work just fine, the FD-235HFA529. This is still available at a number of online retailers. Being impatient I decided to visit Weird Stuff instead of waiting for a mailorder drive to show up. I picked up a FD-235HF3240 with even more jumper options than the current model for $4.95. While the jumper arrangement of the 3240 appears similar to the 5636 model, they are in fact totally different. It tooks some serious digging to turn up the jumper settings by I finally found the information I needed in a 1994 usenet posting. Seeing how I had some difficulty in collecting Teac drive information I decided to take some pictures before closing the MPC60 up.
Jumper settings for the Teac FD-235HF3240
A1 - B1 DS0 Drive select 0 B1 - C1 DS1 Drive select 1 A2 - B2 DS2 Drive select 2 B2 - C2 DS3 Drive select 3 A4 - B4 RY34 Ready output on Pin 34 B4 - C4 DC34 Disk Change output on Pin 34 C3 - C4 DC2 Disk Change output on Pin 2 C4 - D4 DC4 Disk Change output on Pin 4 A3 - B3 HA density set automatically B3 - C3 HI2 density set by HD IN on pin 2 C3 - D3 HO2 density (HD OUT) output on pin 2 D3 - D4 HO4 density (HD OUT) output on pin 4 D1 - D2 LHI ---or--- D2 - E2 LHI HD IN low is high density D1 - E1 LHO ---or--- E1 - E2 LHO HD IN high is high density E2 - F2 HMK half mask for INDEX/READ-DATA F3 - G3 NMK no mask for INDEX/READ-DATA F1 - G1 IR LED on when: (Drive Select AND Ready) G1 - G2 ML motor on when: (Motor ON AND LED on) E4 - F4 ACD disable auto-checking G3 - G4 REN disable auto-recalibration E2 - E3 HF ---or--- E3 - E4 HF must always be in for this version of drive
For the MPC-60 jumper DS0, HI2, RY34, HF, REN, and FG. The drive came jumpered with DS1, HA, DC34, HF, REN, and FG.
Jumper settings for the Teac FD-235HFA529 (also FD-235HF6554 and FD-235HF6573
A1 - B1 DS0 Drive select 0 B1 - C1 DS1 Drive select 1 A2 - B2 DS2 Drive select 2 B2 - C2 DS3 Drive select 3 C3 - D3 REN disable auto-recalibration D3 - E3 ACD(a) disable auto-checking E3 - F3 ACD(b) disable auto-checking D2 - E2 RY34 Ready output on Pin 34 E1 - E2 DC34 Disk Change output on Pin 34 E1 - F1 DC2 Disk Change output on Pin 2 G1 - G2 HA density set automatically F1 - G1 HI2 density set by HD IN on pin 2 F1 - F2 HO2 density (HD OUT) output on pin 2 F3 - G3 IR LED on when: (Drive Select AND Ready)
For the MPC-60 jumper DS0, HI2, RY34, ACD(b), and FG. Teac also recommends bridging S14 on the bottom side of the drive controller to force 720k mode.
Posted by cary at August 6, 2005 11:12 PM