From: RayBryan (raycomp_at_visi.com)
Date: 2008-01-17 19:27:08
Speed test shows it to be good. I have seen many of the Alps
mechanism 1541s that were off track alignment (the anti-piracy head
bump is what usually gets blamed).
--Ray
On Jan 17, 2008, at 3:31 AM, matt wrote:
> are old tech says disk speed is more important than alignment.
>
> just my 2 cents
> thanks matt
> ----- Original Message ----- From: "Pete Rittwage"
> <peter@rittwage.com>
> To: <cbm-hackers@ling.gu.se>
> Sent: Thursday, January 17, 2008 9:01 AM
> Subject: Re: 1541-Newtronics mechanism problem
>
>
>>> I have wrestling with a drive repair for weeks now. I thought I had
>>> it all fixed; it was reading the Dysan 224a alignment (analog)
>>> diskette (Commodore 970016 01 48 TPI alignment diskette) with sine
>>> wave tracks on 16 & 18 and 34 (according to Dysan docs) and so it
>>> then passed the all the Commodore Consumer Diag V2 tests except the
>>> #7 test to fast format and write then read selected tracks (well it
>>> did pass that test with one of the F15 scratch disks). But it would
>>> not format a floppy always reporting 21 read error 00 00. I tried
>>> then formatting with 3 more Newtronics drives and got that same
>>> response.
>>>
>>> Is this a common and well known problem with Newtronics?
>>>
>>> The Commodore 1541 Service Manual PN 314002-01 does not document
>>> this
>>> behaviour or symptomology (of course it is November 1985 but has
>>> some
>>> added pages released later).
>>>
>>> What about the program called "Alps drive check and
>>> alignment" (program 970127.D) on the C.D. V2 disk as "Disk
>>> Alignment"
>>> -41 blocks- is/was there a program called "Newtronics drive check
>>> and
>>> alignment"?
>>>
>>
>> A lot of times trying to align some of those old mechs is futile.
>> You can
>> get it perfectly aligned to 18, 1, and 34, then the next time it
>> bumps the
>> heads it's off a track again.
>>
>> Pete
>>
>>
>>
>> Message was sent through the cbm-hackers mailing list
>
>
> Message was sent through the cbm-hackers mailing list
>
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|Raymond C. Bryan 651-642-9890 vox | The battle is sometimes |
|Raymond Computer 651-642-9891 fax | to the small for |
|795 Raymond Ave -email: raycomp | the bigger they are |
|St Paul MN 55114 @visi.com | the harder they fall. |
|USA Amiga - Commodore | -- James Thurber -- |
http://www.raymondcomputer.com
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