Strange problem with Apple IIc Please Help

14 posts / 0 new
Last post
MaxTek's picture
Offline
Last seen: 1 week 3 days ago
Joined: Dec 20 2003 - 10:38
Strange problem with Apple IIc Please Help

I have an Apple IIc and I can't get the floppy to spin up "unless" I unplug the floppy cable from the floppy drive slightly. When only 2-3 pins are making contact the floppy spins the disk very nicely and the red disk use light comes on. When I have the floppy cable plugged in all the way I can't get the IIc to make the drive do anything.

Any ideas? Thanks.

speedyG's picture
Offline
Last seen: 2 days 14 hours ago
Joined: Nov 16 2011 - 07:45
Re: Strange problem with Apple IIc Please Help

I'm just speechless what ideas can be performed to destroy CMOS chips.....
speedyG

gsmcten's picture
Offline
Last seen: 2 months 1 week ago
Joined: Oct 4 2005 - 18:52
Re: Strange problem with Apple IIc Please Help

Max,

Do you have a spare cable?

Steven Smile

MaxTek's picture
Offline
Last seen: 1 week 3 days ago
Joined: Dec 20 2003 - 10:38
Re: Strange problem with Apple IIc Please Help

speedyG wrote:
I'm just speechless what ideas can be performed to destroy CMOS chips.....
speedyG

? Are you saying I destroyed it by removing the cable powered up?

MaxTek's picture
Offline
Last seen: 1 week 3 days ago
Joined: Dec 20 2003 - 10:38
Re: Strange problem with Apple IIc Please Help

gsmcten wrote:
Max,

Do you have a spare cable?

Steven Smile

No I don't unfortunately.

speedyG's picture
Offline
Last seen: 2 days 14 hours ago
Joined: Nov 16 2011 - 07:45
Re: Strange problem with Apple IIc Please Help

Yep,
by disconnecting that cable you interuppted the groundline....
that is the safest method to destroy a bunch of the CMOS chips....
I'll bet that at least 3 or 4 chips at controller and drive have been destroyed....
spin up of the motor only indicates the connection to the powerlines without control....
speedyG

MaxTek's picture
Offline
Last seen: 1 week 3 days ago
Joined: Dec 20 2003 - 10:38
Re: Strange problem with Apple IIc Please Help

speedyG wrote:
Yep,
by disconnecting that cable you interuppted the groundline....
that is the safest method to destroy a bunch of the CMOS chips....
I'll bet that at least 3 or 4 chips at controller and drive have been destroyed....
spin up of the motor only indicates the connection to the powerlines without control....
speedyG

CMOS chips on the motherboard or floppy drive board?

speedyG's picture
Offline
Last seen: 2 days 14 hours ago
Joined: Nov 16 2011 - 07:45
Re: Strange problem with Apple IIc Please Help

yes... BOTH...

TIP:
it would be usefull to provide better detailed info's
which model of the IIC ? There are beside 3 Versions IIC,IIC+, etc. also 4 Rveisions....
Picture of the Mainboard ? The reason is also to detect mods....

At the simple IIC the drive has a souple of similarities with the Disk II drive....(MC3470 )
And at the different Models and revisions there are different chips used on the mainboard....

Do you also have alternate a AppleII+ Rev. RFI with Disk II Contoller ?

speedyG

MaxTek's picture
Offline
Last seen: 1 week 3 days ago
Joined: Dec 20 2003 - 10:38
Re: Strange problem with Apple IIc Please Help

I will get some pics uploaded. I do not have any extra parts. My basement is filled with Apple stuff but it starts with the 128k and above.

MaxTek's picture
Offline
Last seen: 1 week 3 days ago
Joined: Dec 20 2003 - 10:38
Re: Strange problem with Apple IIc Please Help

Decided to toss it in the garbage. Not worth my trouble. I prefer Mac OS. Thanks everyone for your help.

Offline
Last seen: 6 months 1 day ago
Joined: Mar 16 2017 - 07:31
Re: Strange problem with Apple IIc Please Help

Hi MaxTek - The keyboard, case, and chips in that IIC have value. You could easily get $40 just for the keyboard and probably $30 for the case

gsmcten's picture
Offline
Last seen: 2 months 1 week ago
Joined: Oct 4 2005 - 18:52
Re: Strange problem with Apple IIc Please Help

Hunter,

$40.00 for a IIc Case?

What planet are you on?

Steven Smile

cbmeeks's picture
Offline
Last seen: 5 days 20 hours ago
Joined: Jan 17 2005 - 14:47
Re: Strange problem with Apple IIc Please Help

MaxTek wrote:
Decided to toss it in the garbage. Not worth my trouble. I prefer Mac OS. Thanks everyone for your help.

I hope you're joking. You would have had no trouble selling it...even broken.

Offline
Last seen: 5 months 3 weeks ago
Joined: Oct 5 2017 - 09:17
Re: Strange problem with Apple IIc Please Help

Heck- I'll fix it for you! Please grab that thing outta the trash!

Let me know- I have pro-desoldering/soldering gear. Send me a PM if you've not yet trashed it Smile

Jason

Log in or register to post comments