Trying to repair a Pentax V spotmeter light meter

[Chris_D]

Hello,
I'm pretty new to the EEVblog and I didn"t know that there was a repair subgroup as well.
I have already asked this same question on forums about photography, but maybe this is a better place to start:
I'm trying to repair an old Pentax V spotmeter light meter.
I'm currently figuring out the circuits on the PCB's in it,redrawing them by hand and identifying electronic components (I have made here a few posts concerning).
I was wondering: is there anyone who has already done this? Somebody who has more info about the circuits or parts?
Or someone who could interpret wiring?
Thanks.

[Niklas]

This might be something:
https://www.ifixit.com/Answers/View/708680/Looking+to+identify+this+component+in+a+Pentax+1%C2%B0-21%C2%B0+spot+meter

In one of the answers, there is a link to a functional description and a schematics:
https://www.cameramanuals.org/flashes_meters/pentax_asahi_spotmeter_diagram.pdf

Note the special type of resistors that looks like capacitors on the first sight.

[Chris_D]

It was I who made this post. But behind my back they altered my original title. It was not about a spotmeter 1/21 at all. It was about a Pentax Spotmeter V. I'm still puzzled why the moderator of Ifixit did this.It was like they wouldn't acknowledge that they were wrong or that they were going to be punished for a wrong answer  And they were a little bit condenscending as well. Quite strange actually. But anyway: the spotmeter 1/21 is an older model. The spotmeter has a redesigned circuit and only one power source/battery instead of two. You can read all about it here in my other posts I have made.

[Chris_D]

This might be something:
https://www.ifixit.com/Answers/View/708680/Looking+to+identify+this+component+in+a+Pentax+1%C2%B0-21%C2%B0+spot+meter

In one of the answers, there is a link to a functional description and a schematics:
https://www.cameramanuals.org/flashes_meters/pentax_asahi_spotmeter_diagram.pdf

Note the special type of resistors that looks like capacitors on the first sight.

By the way, I'm still convinced the components shown in that particalur post are resistors (of some kind), because I've desoldered one today and it still reads approx.178 ohm.And I'm currently trying to make a schematic diagram of the whole thing and it is more clear than ever that the circuit for the lamp is a simple subcircuit, and that it must be a resistor (of some sort) to make the lamp less bright. In such a succesful manner that most of the time it doesn't burn at all.  :)But many users of this version of spotmeter are complaining about this phenomenon: either it is to dim or it is not working at all. And I still blame the resistor.