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This 1280MB Quantum 3.5 is missing some component. Does anyone have similar drive or a photo of its working board?

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First post, by crapasanya

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When trying to start this hard drive, it spins up but can't even start a selftest. Upon visual inspection, I found that one rather large element was knocked down in (as far as I understand) the power circuit next to the head cable connector and the LUCENT 91CO5F chip.

I have already tried simple things: changing the master-slave settings, cleaning the contacts, reconnecting the head and motor cable - nothing helped. It really needs this component to work.

Reply 1 of 6, by Nexxen

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Probably a big filter.
Have you measured the two leads? Is there V at one of them?

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Reply 3 of 6, by shevalier

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rasz_pl wrote on 2023-07-03, 12:33:

blue fuse?

ferrite core inductor.
ferrite bead will good enough, or wire too

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Reply 4 of 6, by crapasanya

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shevalier wrote on 2023-07-03, 15:01:
rasz_pl wrote on 2023-07-03, 12:33:

blue fuse?

ferrite core inductor.
ferrite bead will good enough, or wire too

Nexxen wrote on 2023-07-03, 12:25:

Probably a big filter.
Have you measured the two leads? Is there V at one of them?

rasz_pl wrote on 2023-07-03, 12:33:
https://cdn.shopify.com/s/files/1/1267/5579/products/Quantum_1280AT_2_grande.jpg?v=1527227921 https://wiki.preterhuman.net/image […]
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Quantum_1280AT_2_grande.jpg?v=1527227921
Fireball1280_3.jpg
blue fuse?

Thank you so much for the replies, I will try to measure this and if there is voltage at one of the ends, close the pads with tweezers. I will do this as soon as I get home.

Reply 5 of 6, by pentiumspeed

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Inductor. Just power path. Any inductors even the solid one is fine that large, the one that nearly reads zero ohms can be good substitute.

Cheers,

Great Northern aka Canada.

Reply 6 of 6, by crapasanya

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So yesterday I tried shorting the pads with tweezers and what I got was that the motor started to work differently, a little louder, but no selftest, just a quiet even "ticking" of the head for about 5 seconds (I guess it tries to find a track, but can't?), and then the motor would stop and the busy LED on the hard drive itself would flash. And yes, at one pad there is 5v, at the other a little more than 1, I also measured the second exactly the same element on the board and it is measured as 0 ohms. Tomorrow I will try it on a couple of other computers as I have a lot of work today.

There are 4 complete 286s with ther cases, 2 286 boards, VLB DX2 with S3 VLB video card (YAAY), PCI Socket 2 (didn't know this existed), socket 7 mb, socket 370 mb with 400MHz Celeron, slot 1 with 500MHz PenIII, 3 SB Vibra 16, ESS Audiodrive, and a lot now working (after cleaning) of two-button CD-ROMs, 10GB HDD and dead 6GB HDD. And all this for $44.44 from my college. I found it all among the garbage in the pantry of one of the teachers. He was going to take it to the metal yard for a penny. In the next session I will try to buy a bunch of hard drives from him (he said he will not sell until you copy the information from them)

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