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Forums > CSDb Discussions > fixing an oceanic drive
2019-04-07 00:38
maestro

Registered: Mar 2004
Posts: 675
fixing an oceanic drive

does anyone on here know anyone who is good a repairing disk drives?

I have an oceanic 9900 that was working great but now its struggling to read disks for some reason.
ive tried cleaning the heads the no avail.

it is still working but works really strange when reading.

or does anyone know if there's a head alignment program that work with this
2019-04-07 11:53
Thunder.Bird

Registered: Nov 2003
Posts: 73
Would help to give your location. Else P&P would add.
Do you own an Oscilloskope? First check the PSU.
2019-04-07 14:31
maestro

Registered: Mar 2004
Posts: 675
location is uk.
I don't own an oscilloscope.
any other way to test the psu without one?
2019-04-07 23:04
Thunder.Bird

Registered: Nov 2003
Posts: 73
Of course, but more or less blind...
Check for voltages 5Vdc and 12Vdc with less then 5% ripple (ac-amount).
Do that while you're loading a game like Last Ninja 2, that lasts a minute so you have all the time to determine the right connection points for your multimeter.
Another thing mostly forgotten is to remove all the dust on the r/w-head rails and give it a little(!) Vaseline to run smoothly while track-changes.
I think you used 100% (or at least 70%) Isopropanol to clean the r/w-head with a cloth or Q-Tip.
If all that doesn't work to get your 9900 running, try to ask a local Radioshack or similar institution to get your drive working again. Offer your help with this!!!
2019-04-07 23:24
Snabel

Registered: Aug 2015
Posts: 21
2019-04-08 19:21
Krill

Registered: Apr 2002
Posts: 1165
As Vaseline might not be a staple in many households, alternatives are things like bicycle grease or typewriter oil to apply on the rails.
2019-04-14 23:20
maestro

Registered: Mar 2004
Posts: 675
ok I managed to get a reading.

pin 1 should be 5v and is measuring around 5.09v
pin 5 should be 12v and is measuring around 16v

is this too high for pin 5?
2019-04-14 23:32
maestro

Registered: Mar 2004
Posts: 675
2nd measure is differnet.

both pins are now reading 5v's?

psu issue do you think?
2019-04-14 23:49
maestro

Registered: Mar 2004
Posts: 675
would this do for a cheap osciliscope??

https://www.ebay.co.uk/itm/Fully-Welded-Assembled-DSO138-2-4-TF..
2019-04-16 15:08
Thunder.Bird

Registered: Nov 2003
Posts: 73
For everydays purposes this would absolutely do it, I think. Don't expect 100% accuracy with this toy, though.
But as you already guessed, there might be a problem on the 12Vdc rail.
This will affect all the mechanical action inside the drive as for the spinmotor and the headspindle.
You propably might try another PSU if it has the 4-pin power-connector like on 1541-II and 1581.

My clue: unplug PSU from mains, open it and locate the 3-pin Transistor reading 7812 (or similar). Desolder and measure with simple Multimeter on Diode-Test mode. Or replace it instantly with same or compatible type. Also have a look at the compensator connected to this 12Vdc-rail. If it is bloated or has white crust on the bottom, replace it (actual compensators are smaller but with same readings).

But let the other hardware guys speak here, too! Good luck.
2019-04-16 20:28
maestro

Registered: Mar 2004
Posts: 675
it's actually a 5 pin din not the 4 pin so I don't have another psu to try.

ill try doing what you said or I may try to make another psu similar to what I did with my 1541-11

cheers

maestro
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