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12-13-2019, 05:15 AM   #1
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searching P67 ttl pentaprism electronic scheme

Hello,
Does anyone know were to find the electronic scheme of a P67 TTL pentaprisme?
The one with IC on circuit board, ( it seems to be the latest model before P67ii).
Thanks!

12-13-2019, 09:43 AM   #2
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I think that's going to be a hard one to find.
12-13-2019, 04:36 PM   #3
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Source a TTL prism from eBay or a used-equipment dealer, disassemble it and go from there. It doesn't have to be in working order. You are talking about something that was introduced many decades ago and electronic schema (not scheme) is usually only available to repair facilities or those people who have drawn up schema directly from hands-on disassembly and observation.
12-14-2019, 12:40 AM   #4
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QuoteOriginally posted by tuco Quote
I think that's going to be a hard one to find.
Exact Tuco, soooo difficult ! I'v been looking on the web for a month... and nothing yet ;(

12-14-2019, 12:49 AM   #5
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QuoteOriginally posted by Silent Street Quote
Source a TTL prism from eBay or a used-equipment dealer, disassemble it and go from there. It doesn't have to be in working order. You are talking about something that was introduced many decades ago and electronic schema (not scheme) is usually only available to repair facilities or those people who have drawn up schema directly from hands-on disassembly and observation.
Of course, Silent Street,
before taking the time to do the full diagram with my prism, if someone has already done it or if a former technician from pentax comes by and has the documentation on his shelf I will be delighted.
12-14-2019, 08:43 AM   #6
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Look at this discussion. There are some pictures of the electronic circuit.

TTL Meter Repair? - PentaxForums.com
12-15-2019, 12:54 AM   #7
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QuoteOriginally posted by dantonvb Quote
Look at this discussion. There are some pictures of the electronic circuit.

TTL Meter Repair? - PentaxForums.com
Thanks Dantonvb, I have already seen it, it's exactly my model, but the details are not exhaustive enough...

12-15-2019, 09:30 AM   #8
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Search wise, in the USA the term is 'schematic.' (I don't have one.)

Good Luck!
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