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810 Kaput?


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got an 810 drive that spins up on power-up.

drive head does not move at all tho.

 

ie initial 7 seconds spin-up is as much as it does, then when atari computer powered up, self-test screen appears and no drive activity at all.

 

any clues/help welcome

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Check the ID switches first up. Move them about then set back to drive 1. To be totally sure on drive ID it's a good idea to use another device to boot a Dos with drives 1-4 enabled in the bitsettings. Then switch the device off and try a command to each drive in case the 810 is assuming the wrong ID.

 

You can download the Field Service Manual for 810, and also the Sam's Computer Facts book from http://www.atarimania.com/documents-atari-400-800-xl-xe-technical-documents_3_8.html

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yep. thing is, after the initial power-up spin-up, i don't know whether these are supposed to "track zero", or if they wait for an instruction before further activity.

either way; power-up - drive spins 6 seconds - stops - power up atari - drive does nothing

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The 810 is a tank, tear it down deoxit clean and re seat everything.. daughter card connections,switches et al... when done check the voltages. if good slide the head half way with power off.. take a single density know good disk and fire it up...... lastly check felt and spring on the heads pressure pad, I have seen the glue let go on em..... post back when done

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well. all of the above (later) minus the voltage checks - will do that tomorrow.

 

anyhow, exact same symptoms prevail.

one thing i notice (upon closer inspection) there is "some" head movement...about 3/8". but that is all.

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