Cz-6 and 1236-x2 Prototypes?

[Millenial49er]

Hi everyone, new to the forum. Found you guys after doing some research on a pair of detectors I bought yesterday. A guy had these listed for $25 each. He said he bought items from foreclosed homes at auction and relists them for sale. They power up but aren't functioning properly. After bringing them home and inspecting them further the 1236 reads proto #004 as the serial and has a face plate that doesn't match other detectors of the same model I've found online. The cz-6 has no serial but is labeled "quality control test fixture". I opened up the cz6 and found the pcb's have been jumpered and modified all over the place. Any ideas what I stumbled upon? Will any schematics help here? See pics.

[vlaser]

Need a photo of the board 1236

[Millenial49er]

Pics of the 1236

[vlaser]

it's not 1236

[sinclairuser]

try to test the power circuits first, be careful of schematics even fisher ones, if these are protos those mods may be fixes so dont rip them out and try to rebuild them using schematics.
prototypes are gerry rigged sometimes due to faults from one off production.
what looks like a mod might be crucial to make it work, its hard rebuilding prototypes because they often dont conform to production units, i have a cscope cs220 proto the internal board is closer to a 330 but its shape is niether 220 or 330, luckily it works perfectly.
the sad thing here is there are users of this forum who know what these are, who built them and how to fix them, but the silence and lack of posts in this thread speaks volumes.

[Carl-NC]

the sad thing here is there are users of this forum who know what these are, who built them and how to fix them, but the silence and lack of posts in this thread speaks volumes.

Sorry, I have no information on these, they predate my employment by at least 20 years. Both appear to be prototypes, no doubt sent to field testers who never returned them.

[vlaser]

Cz-6 has two sandwich boards.

[sinclairuser]

Sorry, I have no information on these, they predate my employment by at least 20 years. Both appear to be prototypes, no doubt sent to field testers who never returned them.

hi carl, i wasn't directing that comment at you, you were not there when it was fisher labs.
but there are people here who were connected to fisher and even if they can't help saying so would in its self be helpful.
thanks,
aly.

[Carl-NC]

I don't think anyone else here is/was connected to Fisher. Dave J no longer visits any forums.

[sinclairuser]

I don't think anyone else here is/was connected to Fisher. Dave J no longer visits any forums.

ok sorry my bad