From: MagerValp (MagerValp_at_cling.gu.se)
Date: 2005-12-06 23:26:44
First off, the 6526:s arrived today, thanks Ruud!
Unfortunately I forgot the package at work, so I sat down and tried to
figure what was wrong with another C64. The symptoms are the classic
LED on, black screen. I replaced the fuse, which was blown, but the
machine still won't power up. To summarize:
* 250407 board.
* PSU is fine, I measure 9.4 VAC at the power connector, and 5 V on
the user port.
* With the fuse removed, I measure 9.4 VAC across C21.
* With the fuse in place, I measure 2.0 VAC across C21, but this
fluctuates a bit (0.6 - 2.1 VAC).
* With the fuse in place, I measure 0.15 V across pins 2 and 3 on VR1,
the 7812, and this also fluctuates a little.
* I tried removing the VIC and the SID, which I believe are the only
9/12V ICs, and it didn't have any effect.
I don't have any other 250407 boards on hand, so I don't have anything
to compare with. I also kinda suck at analog stuff :) So, does anyone
have a clue as to what's going on?
PS: after taking inventory, I realize that I could use a couple of
1541-II/1581 PSUs, and maybe a couple of C64s too (especially with
250407 and BN/E boards). If you have spares and are interested in
trading or selling, send me a mail off list. Oh, and 230 V/PAL
only :)
--
___ . . . . . + . . o
_|___|_ + . + . + . Per Olofsson, arkadspelare
o-o . . . o + MagerValp@cling.gu.se
- + + . http://www.cling.gu.se/~cl3polof/
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