apple IIe stuck

19 posts / 0 new
Last post
Offline
Last seen: 3 months 4 weeks ago
Joined: Mar 15 2019 - 07:03
Posts: 12
apple IIe stuck

Hi guys, on power on my Apple IIe PAL filled the video with garbage, i replaced all the RAM IC and it started. I was able to interact. I wrote something and press return and i got "?SYNTAX ERROR".
After some power off and power on, i got  screen but i'm not able to interact, if a press CTRL+closed apple+reset the diagnostic start and I got KERNEL OK.
Any suggest to fix the problem?
thanks a lot

Offline
Last seen: 4 hours 18 min ago
Joined: Jun 18 2010 - 13:54
Posts: 176
what did you type that

what did you type that produced the SYNTAX ERROR?

 

Try typing HOME and then return. Does that work?

Offline
Last seen: 3 months 4 weeks ago
Joined: Mar 15 2019 - 07:03
Posts: 12
I wrote some char and hit

I wrote some char and hit enter, but now i'm not able to write anything i think the encoder chip is faulty, is there a way to test it?

Now every time i power on, a "+" is printed repetitevely

 

thank you

Offline
Last seen: 2 hours 59 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 383
The keyboard may need to be

The keyboard may need to be thoroughly cleaned.  Also make sure the cables and socketed chips are firmly seated.

 

Offline
Last seen: 3 months 4 weeks ago
Joined: Mar 15 2019 - 07:03
Posts: 12
Yes, I cleaned the keyboard

Yes, I cleaned the keyboard and checked the IC, the strange thingh is i'm able to launch the test with CTRL+close apple+reset, but if i press a key no chars are printed on video.

thanks

Offline
Last seen: 7 months 1 week ago
Joined: Nov 8 2018 - 15:49
Posts: 20
zappx wrote:Yes, I cleaned

zappx wrote:

Yes, I cleaned the keyboard and checked the IC, the strange thingh is i'm able to launch the test with CTRL+close apple+reset, but if i press a key no chars are printed on video.

thanks

 

Well that suggests the encoder is broken.  The reset key is the only key that doesn’t go through the encoder and  it sounds like that’s the one key that works.

Offline
Last seen: 3 months 4 weeks ago
Joined: Mar 15 2019 - 07:03
Posts: 12
I will buy a new encoder, i

I will buy a new encoder, i will let you know if everything will works fine.

thank you

Offline
Last seen: 3 months 4 weeks ago
Joined: Mar 15 2019 - 07:03
Posts: 12
Hi, I changed the encoder

Hi, I replaced the encoder chip and now the apple IIe stopped to repeat number 9 or + on the screen, but the keyboard does not work. Any suggest?

N.B. the keys combinations for reset and test works fine

thanks in advance

TedThompson's picture
Offline
Last seen: 7 months 10 hours ago
Joined: Sep 24 2018 - 17:45
Posts: 48
Just fyi reset and apple keys

Just fyi reset and apple keys do not pass through the keyboard scan circuitry.  It could be the keyboard, the 40 pin ay-5-3600pro (you may have gotten a bogus or faulty one) or the keyboard ROM. 

Offline
Last seen: 4 hours 18 min ago
Joined: Jun 18 2010 - 13:54
Posts: 176
And of course, always check

And of course, always check the power supply first! Make sure all the voltages are within spec, especially the -12V.

Offline
Last seen: 3 months 4 weeks ago
Joined: Mar 15 2019 - 07:03
Posts: 12
Many thanks to all guys, I

Many thanks to all guys, I replaced again the AY-5-3600-PRO. The first one was a "clone" bought on ebay at low price, for the second one  I made sure that it was an original GI encoder chip and it worked. I fixed the problem, now the keyboard works fine.

regards

 

 

DrumCorpsFan's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: May 24 2019 - 23:23
Posts: 4
Apple IIe not working keyboard

I have exactly the same keyboard problem.  With the comments I've read, I will order a new AY-5-3600-PRO. Could you please tell me where you bought it so I can hopefully skip the "not working again" step.

Many thanks!

Offline
Last seen: 3 months 4 weeks ago
Joined: Mar 15 2019 - 07:03
Posts: 12
Hi, i bought the chip from
css
Offline
Last seen: 22 hours 13 min ago
Joined: Mar 18 2019 - 00:10
Posts: 12
Here's the link to U.S. eBay:
DrumCorpsFan's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: May 24 2019 - 23:23
Posts: 4
Apple IIe not working keyboard

Thanks for the feedbacks!

I'm waiting for delivery and should be able to test it in a few days/weeks...

DrumCorpsFan's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: May 24 2019 - 23:23
Posts: 4
Apple IIe working keyboard! Disk drive down...

I installed my new AY-5-3600-PRO chip and the keyboard works like a new one!
Now I have a problem with the disk drive that does not start. At power on, the drive creates a couple of "ttrrr" as usual, but it continues to spin continuously and nothing happens. It's like it's not a boot diskette.
I tried with the 2 drive units that I have, different diskettes, with the same result. I also cleaned the disk drive heads with alcohol.
Could it be the disk controller card that is bad? (which is obviously installed in slot 6)
An idea of what could be wrong?

Thanks!

Offline
Last seen: 2 hours 59 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 383
The most common failure on

The most common failure on Disk ][ is the 74LS125 on the analog card blows.  That is normally caused if the cable is plugged in the wrong direction or off by a pin.  That chip sort of acts as a "fuse" and usually saves other parts from frying.  The bad thing is, that quite often what it blows like that the boot sector of any floppy inserted into the drive will get wiped.  So until you verify this is not the problem you probably don't want to try any more floppies.

 

DrumCorpsFan's picture
Offline
Last seen: 5 months 3 weeks ago
Joined: May 24 2019 - 23:23
Posts: 4
Good news! I changed the

Good news! I changed the 74LS125 as suggested and my floppy drive is working good. Thanks for your help!

Offline
Last seen: 2 hours 59 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 383
Glad to hear the floppy is

Glad to hear the floppy is working.

 

Log in or register to post comments