Re: HELP #1 - Broken AppleIIc

[Rubywand <rubywand@swbell.net>]

Angelo Fonzeca writes ...
> 
> Hi to All!
> 
> I've got an AppleIIc but it does not work well...
> The problems are:
> 
> 1) When i turn on the computer, if there is a Prodos disk in drive the
> system read but the system go into an infinite loop!
> 2) If i press control reset on the keyboard i go into basic... if i write
> command, the system actives L/M monitor or it shows some characters, strange
> errors or "out of memory!" error
> 3) Always on the screen there are three strange characters on different
> position
> 
> I think it can be RAM but the HALxxx chips became hot when i turn on... so
> it can be that chips :(
> 
> Anyway, the questions are:
> 
> 1) Where can i found 4264 chips? Are they compatible with 4164?

     4164 are 64k x 1 RAM chips.

     A 4264 would be a 16k x 4 RAM.  It would not be compatible with a 4164.
(4264 is a Panasonic number. An electronic parts dealer who handles Panasonic
chips could sell you some.)


> 2) If the HALxxxx chips are broken, where can i buy them? ( I came from
> Italy )
 ....

     I do not have a //c schematic and do not know what kind of chips 
"HALxxxx" may be. Running a bit hot does not always mean a chip is bad-- some
chips naturally run hot.


     With power turned OFF, try removing and replacing each chip which is in a
socket. This may fix a bad contact and cure your problems.

     You might get some good suggestions from the guys who run the French //c
site at http://www.multimania.com/apple2c/Docs/Docs.htm . (There is an email
contact address shown near the bottom of the web page at
http://www.multimania.com/apple2c/links.htm )



Rubywand