On 6/11/2015 9:57 AM, Keith Matthews wrote:
>    Re: Re: C-64 with no 9v possible failures?
>    By: Clocky to Keith Matthews on Thu Nov 05 2015 06:11:35
>
> Hi Again,
>
>   > On 4/11/2015 6:39 PM, Keith Matthews wrote:
>   > >    Re: Re: C-64 with no 9v possible failures?
>   > >    By: Clocky to Keith Matthews on Wed Nov 04 2015 17:39:04
>   > >
>   > > 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
>   > 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 o
>   > as
>   > >   > > Normal.
>   > >   > >
>   > >   > > Thx for any advice 8-)
>   > >   > >
>   > >   >
>   > >   > Do you know the history of the C64 because the C64 that was sold by
Al
>   > >   > (but not only Aldi) is known to have the 9VAC missing at the user
port
>   > >   >
>   > > Oh Wow really,
>   > >
>   > > I just assumed they were all the same. It is a Breakbox (older) model
so I
>   > > would have expected it to be
>   > > Pre Aldi. 8-)
>   > >
>   >
>   > No the Aldi models where breadboxes but they did have a white keyboard,
>   > but that could have been swapped at some stage.
>
> This one has the older style Brown Keys on it. 8-)
>
>   >
>   > > I know the unit used to work, although I could only get B & W out of
it.
>   > > Prehaps it
>   > > is an NTSC version?
>   > >
>   >
>   > Checking the guts will tell you. Check the part number on the VIC-II and
>   > see here;
>   >
>   >
https://en.wikipedia.org/wiki/MOS_Technology_VIC-II#List_of_VIC-II_versions
>   >
>
> Will Do Thx
>
>
>   > Since you're in NZ I would suspect it to be the same as our PAL system
>   > (in Australia) but I found a 1541 dumped in the bush once that kept
>   > popping fuses and it wasn't until I realised it had a 110V sticker on
>   > the back that it was an US model. I rewired the 5V and 12V lines to
>   > accept an AT power supply and it worked perfectly.
>
> Cool, 8-)
>
>
> I'm in Australia 8-) Canberra actually.

Oh OK I was going by your header info (Agency BBS, Dunedin - New Zealand
| bbs.geek.nz)


8-) I thought you were in NZ?
>

WA.

>   >
>   > What the hell it was doing laying in the bush I don't know.
>
> Rusting ?
> 8-)

Slowly ;-)

>   >
>   > > There is no screen now though, so something inside has died.
>   > > I wonder where else on the main board I could safely check for 9V?
>   > >
>   > > Thanks.
>   > >
>   >
>   > If you are using the old brick style power supply I would recommend that
>   > you stop using it as they are notorious for letting go and taking the
>   > computer out with it unless you can confirm that it's OK by checking the
>   > 9VAC and 5V lines.
>   >
> I amusing one of the Black Brick style ones, but it seems to work Fine. I
> tested
> it this week on a CBM Power Monitor and it came up OK 8-)

Ok that's good.

>
>   > There is a fuse inside the C64 that you can check and if you look for
>   > the revision motherboard printed on the PCB and post it here (or post
>   > pics online of the board) then that will be helpful.
>   >
>
> Yeah I checked the Fuse, it seems fine.
>
> I'll open it up again and have a look at the board version and post it here.
>
> Thanks.
> 8-)

No worries.

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