[vcf-midatlantic] Pet with 9" screen

David Hoelzer dhoelzer at enclaveforensics.com
Mon Aug 19 12:29:46 EDT 2019

Well, I have the schematic and have built a BOM from it, but it turns
out that a few of the parts that were on the board when I pulled out
don't match the schematic.  Looking at the board where the
Mylar/Electrolytic difference is, the silkscreen seems to indicate
electrolytic.  I am 100% sure that the schematic/diagram matches the
board that I have. :)

On 8/19/19 12:27 PM, Sentrytv wrote:
> Personally I would replace all the components if necessary with the original component because it was working at one time.
> if you cannot find the proper schematic you may have to reverse engineer it.
> I think most of us have done that at one point or another.
> But truthfully if you want to keep it original, it may come to that.
> Sent from:
> My extremely complicated, hand held electronic device.
>> On Aug 19, 2019, at 12:21 PM, David Hoelzer via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org> wrote:
>> I've been slowly working my way through rebuilding the CRT board for a
>> 9" 2001-32 PET.  As I've been working, I've been discovering that the

>> components on the board don't all match the specs in the documentation,
>> but that's ok...  Eventually I'll get together all of the pieces I'm
>> missing and reassemble everything.. I'm working right now to figure out
>> why the schematics call for a mylar capacitor but my board had a
>> differently rated electrolytic.
>> Anyway...  I'm seriously thinking about taking a 9" LCD panel with a
>> composite input and wiring up a composite converter circuit to the
>> internal video connector on the board.  I would dismount the CRT tube

>> and put the LCD in in its place.  Of course, I'll preserve the removed
>> parts for posterity... but does this offend your sense of vintage
>> stuff?  Personally, it seems practical to me since I'd like to do some
>> things with the PET...  and the CRT is a potential major source of
>> problems in addition to an energy hog/heat source.
>> THoughts?
>> -- 
>> ----
>> David Hoelzer
>> Chief of Operations
>> Enclave Forensics, Inc.
David Hoelzer
Chief of Operations
Enclave Forensics, Inc.

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