Re: Apple IIc

[anon@anon.net (JM Carmack)]

'Fraid your IWM is toast bubba.  The headhunting is a dead giveaway for 
that.



stephen@apple2.org.za (Stephen Shaw) wrote in
<9h522n$3da$1@venus.itns.co.za>: 

>With regard to my previous post to Ralph. Yes I did check the speed
>while it was connected to the Disk II controller. Everything checks out
>OK, I used Copy II Plus, the Apple Dealer Diagnostics and the Verbatim
>check disks. I think the drive is Ok I have a feeling that one of the
>chips on the motherboard is faulty. The drive does spin up and the head
>"hunts", but it doesn't read. I hope it isn't the IWM chip. I have some
>but am reluctant to start uninformed "surgery".
>
>On Sun, 10 Jun 2001 21:27:48 +1000, Mark Cummings wrote:
>
>> And if after cleaning the heads, I would recommend try to boot a known
>> good disk, while at the same time adjusting the drive speed pot
>> underneath the IIc, until the disk boots.  If you look under the IIc
>> there is a small hole about 1/8" dia, you need a small metal (for
>> strength) jewellers screwdriver to adjust the speed. It's a little
>> tricky getting it in the right spot. Then run a speed check/adjusting
>> program such as the one in Copy II Plus. I have used this method to
>> boot a dead clone before, where I did not have another compatable disk
>> drive to try on it. Another method you may try is to plug in an
>> external 5.25 drive, power up, hit ctrl-Reset and type PR#7 to boot a
>> disk in the external drive. I think this only applies to early ROMs
>> AFAIK. For late ROMs ONLY you could use a 3.5" Unidisk drive (NOT
>> Apple 3.5) if you have one. It will boot automatically after it checks
>> the internal drive. Then run the drive spped adjustment program off
>> the 3.5 to set the internal 5.25. 
>>
>> Mark
>>
>>
>> Ralph Glatt <mairsil@my-deja.com> wrote in message
>> 3be3af45.0106091651.3d811230@posting.google.com">news:3be3af45.0106091651.3d811230@posting.google.com...
>>> Stephen Shaw <stephen@apple2.org.za> wrote in message
>> news:<9ft4l2$n44$1@venus.itns.co.za>...
>>> > On Sun, 27 May 2001 06:22:37 GMT, ralmin wrote:
>>> >
>>> > >> Does anyone know what the problem is when your Apple IIc at
>>> > >> startup 
>> says
>>> >  "Check
>>> > >> drive". I have taken the drive out and put it on a Disk II
>>> > >> interface 
>> where
>>> >  it
>>> > >> boots just fine. As I now have a Pace desoldering station I can
>>> > >> now 
>>> >  unsolder
>>> > >> chips without any fears. Anyone with the old SAMS computerfact
>>> > >> for 
>> the IIc
>>> > >> would be able to advise me what to check.
>>> > >> If anyone has the SAMS Computerfacts for the II range please
>>> > >> contact 
>> me
>>> >  I'd
>>> > >> like to buy them if the price is right
>>> > >
>>> > > "Check drive" just means there is no bootable disk in the drive.
>>> > >
>>> > > I hate to ask it but did you try it with a few disks first?
>>> >
>>> > YEP!
>>>
>>> Okay, then, have you tried cleaning the heads?
>