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Apple External Hard Drive 40SC
Posted by: bobo68 on 2015-05-01 02:44:54
Hi,

I just acquired a 40SC in its original state from end of 80s. I thought this might be useful as a reference.

Luckily the Service Source for this hard drive family (20SC, 40SC, 80SC, or 160SC) is still available: http://tim.id.au/laptops/apple/misc/external_hard_drive_sc.pdf so it is easy to see how the enclosure can be opened.

Sadly my drive came with broken clamps for the power supply:  🙁

2015-05-01 10.47.20.jpg

The 40SC has a 5 1/4" Quantum SCSI drive in it (other members of the family have 3 1/2" drives):

2015-05-01 10.47.29.jpg

In typical Apple style of that time the drive can be disassembled mostly without screws, everything is clamped to the chassis. Even the fan assembly:

2015-05-01 10.57.16.jpg

Detach the LED cable:

2015-05-01 11.03.14.jpg

Detach the SCSI selector cable:

2015-05-01 11.00.59.jpg

The drive mechanism itself is screwed onto its carrier. The carrier can also accept 3 1/2" drives:

2015-05-01 11.07.16.jpg

The board of the Quantum drive is full of discrete parts:

2015-05-01 11.05.00.jpg

2015-05-01 11.09.17.jpg

Cheers,

bobo68
Posted by: bobo68 on 2015-05-03 06:02:47
Today the drive (mechanism) died. The platters spin up and then the drive makes 4 repeating sounds as if the heads are stuck and it tries to make them move. After nearly 30 years that's ok I guess. RIP.
Posted by: techknight on 2015-05-03 17:29:05
Its a quantum. To be expected. Melted rubber inside thd drive.
Posted by: NJRoadfan on 2015-05-03 17:46:19
My 40SC's Quantum drive does the same thing. It had a long life, I'm surprised it lasted this long to be honest.
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