Connor CFS1275A hard drive turns on makes musical sound

[duck22]

i know what head you are talking about
the drive head

[helpless]

... your drive, ... it's not supported by the mainstream firmware data recovery tools, like PC-3000 ...

... just want for you to know that my PC-3000 ISA supports your drive at firmware level

Your copy must be a special edition.

Your "musical sound" might be ... heads hitting the limiter

Maybe a drum solo? Never heard anyone call hdd clicking music.
Sorry Spildit, I couldn't help noting the above.

Hi gurus,
Well, after this foreword I begin my story, maybe someone can help me (free). I have a Conner CFS420A, that behaves the same way. Spins up and down a few times then stops. It was tested with a pcb from an identical model (own pcb was physically damaged), that has no such problems. So it is definitely a motor problem in my case. I can see 3 screws on the motor cover, has anyone been successful in repairing a motor failing to reach full speed? If I remove those screws, do I get access to the spindle shaft and adding some lubricants will help? Just want to repair the drive, if possible.
By the way I have an old ST157A, same problem, not reaching full speed (led blinking 16x) is there any remedy? Thank you.

Attachments

[fzabkar]

I would start by examining how a working drive behaves under fault conditions.

If you isolate the HDA from the donor PCB on the donor HDD, does the donor spin up and remain spinning?

[fzabkar]

What is the Conner MCU ? Motorola, Uxx, Ferro or ConnerTech ?

It appears to be Motorola. U12 is a Motorola special order (SC415016AFU). According to the following discussion, these were MC68HC MCUs -- 68HC11A or 68HC11E, or possibly 68HC16 or 68HC11F.

https://community.freescale.com/thread/70871

[guru]

ConnerTech is another later manufacturer which turned into Exelstore.

Motorola is what you need, although just a terminal would help.

[guru]

Probably worth moving patient U15 onto your donor board and trying again. Can you upload pics of top labels from both HDDs?

[fzabkar]

Here is a photo of the complete CFS420A PCB:
http://kirpantin.vv.si/img/hdd/img_4867.jpg
http://kirpantin.vv.si/hdd.htm

http://www.computerhope.com/hdd/hdd0020.htm (specs and jumpers)

U15 looks like a ROM for U14 (SC415951FB) while U11 appears to be the ROM for U12.

[fzabkar]

It's in Russian ...
http://www.acelab.ru/dep.pc/doc.pc3000d ... cconer.pdf

U15 is probably a mask ROM:
http://web.archive.org/web/199610280301 ... m/rom.html

I expect that the pinout would be similar to these flash EEPROMs (except for WE* and Vpp):
http://www.micropik.com/PDF/28f512.pdf
http://www.romservice.ru/datashee/M28F256.PDF
http://www.futurlec.com/Datasheet/Memory/28F256.pdf

Note that the CE and OE pins may be active high:

The control pin function and active level, as well as the memory contents, are user-defined.

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