20 Aug
2010
20 Aug
'10
12:10 p.m.
On Fri, 20 Aug 2010, Tony Duell wrote:
Further on this, you can also power the '64 up with only the +5VDC. The
9VAC (as has been mentioned in past) is used primarily for TOD and
cassette port power. If the OP is needing precise timing, this probably
isn't a long-term solution - but if it comes up correctly under +5VDC
(which presumbly can be sourced with relative ease) then you know it's the
brick also.
For what it is worth.
- JP
The C64 that I
want to use is 27 years old and worked just fine when I last
fired it up about 10 years ago. Anyone have any experience with this type
of behavior? Is it worthwhile to replace the internal power supply
electrolytics or should I build a new power supply for it? Have lots of 5
VDC supplies but don't seem to have a 9 V transformer in my junk box.
If you think it's the power brick (and it might be), you could test
things by using the 9V AC otuput from that 'brick' (that is unlikely to
fail in an odd way, it's just the secondary wining of a transformer),
along with a separate 5V supply connected in placeof the 5V output from
the brick (in other words, desolder the 5V wire at the C64 conenctor and
connect a 5V PSU to the C64). If it works, then you know ehre the problem
lies.