Re: Re: C-64 with no 9v possi
  By: Ed Vance to Keith Matthews on Sat Nov 07 2015 11:55:00

Hi Ed,

 > 11-04-15 22:39 Keith Matthews wrote to Clocky about Re: C-64 with no 9v
possi
 > Howdy! Keith,
 > 
 >  KM> @MSGID: 
 >  KM> @REPLY: 
 >  KM>   Re: Re: C-64 with no 9v possible failures?
 >  KM>   By: Clocky to Keith Matthews on Wed Nov 04 2015 17:39:04
 > 
 >  KM> Hi Clocky
 > 
 >  > On 4/11/2015 8:08 AM, Keith Matthews wrote:
 >  > > Hi All,
 >  > >
 >  > > I have a breadbox style C-64 that has stopped working.
 >  > > I connected my 1501 Power Monitor to the Power Supply and it
 >  > > seems fine for both 5v and 9v (well it shows 10v)
 >  > >
 >  > > The Power Supply work fine with my C64C machine.
 >  > >
 >  > > I connect the 1501 Power Monitor to the User Port and I
 >  > > only get the 5v indication
 >  > >
 >  > > There does not seem to be 9v at the user port.
 >  > > I have pressed in all the chips and checked the internal fuse on the
C-64.
 >  > >
 >  > > Just wondering if any of you great CBM guru's might know of the top of
you
 >  > > head
 >  > > what component (I'm guessing a capacitor?) might be failing?
 >  > >
 >  > > Also there is no display when powered on. The C-64 Power LED comes on
as
 >  > > Normal.
 >  > >
 >  > > Thx for any advice 8-)
 >  > >
 >  >
 >  > Do you know the history of the C64 because the C64 that was sold by Aldi
 >  > (but not only Aldi) is known to have the 9VAC missing at the user port.
 >  >
 >  KM> Oh Wow really,
 > 
 >  KM> I just assumed they were all the same. It is a Breakbox (older)
 >  KM> model so I would have expected it to be
 >  KM> Pre Aldi. 8-)
 > 
 >  KM> I know the unit used to work, although I could only get B & W
 >  KM> out of it. Prehaps it
 >  KM> is an NTSC version?
 > 
 >  KM> There is no screen now though, so something inside has died.
 >  KM> I wonder where else on the main board I could safely check for
 >  KM> 9V?
 > 
 >  KM> Thanks.
 > 
 > Some time ago I saw a Link to Ray Carlsen's web pages for the C=64 in this
 > rea.
 > 
 > He has lots and lots of pages that may help You.
 > 
 > The Home page is:
 > 
 > Ray Carlsen's-RepairingCommodorePCs
 > http://personalpages.tds.net/~rcarlsen/cbm.html
 > 
 > This page has the Service Manual.
 > http://personalpages.tds.net/~rcarlsen/cbm/c64/C64_SERVICE_MANUAL.pdf

Thanks for those links 8-)



 > 
 > HTH
 > 
 > ... Here On Earth Computers Alway Win Because They Have Inside Information
--------------------------------------
Regards........Geo
oooOOOooo
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