Bill Beech (NJ7P)
nj7p at nj7p.org
Sat May 12 20:02:54 CDT 2007
I am trying to repair an H8 computer. I have downloaded the manuals,
but there is only a schematic for the cassette interface. I suspect the
schematics were part of the larger foldouts for the boards.
Anyone got the schematic scanned in for the CPU, Memory and Disk
Carroll Waddell wrote:
> Lee Hart wrote:
>> From: Carroll Waddell
>>> This board is hard to troubleshoot because it's so hard to get
>>> to in the machine.
>> Ah, you do not know the secret!
>> Tape a piece of nonconducting wood, foam or rubber along the top edge
>> of the CRT (to prevent shorts). Install the CPU board horizontally,
>> so its lower edge sits on top of this insulator. The two screws that
>> normally mount the CPU board still go in the vertical brackets.
>> You'll find that the cables are barely long enough so with careful
>> routing you can still plug them in. Now you can easily get at both
>> sides of the board to probe things, change parts, etc.
>> I would not waste my life in friction when it could be turned into
>> momentum. -- Frances Willard
>> Lee Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
>> Delivered by the SEBHC Mailing List
> Thanks Lee. I'm glad to know to turn the CPU board around. I now have
> the CPU board and memory expansion board working. Will try diskette
> adapter and serial adapter next week. Thanks again.
> Delivered by the SEBHC Mailing List
Delivered by the SEBHC Mailing List
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