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| SNES/Genesis Konami Justifier: how to determine photo diode/phototransistor? |
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| opt2not:
So I recently bought a Justifier for the SNES port of Lethal Enforcers from crashwg. It doesn’t want to work properly. I didn’t really expect it to given the price I paid. But I’d like to see if I can repair it. Right now, the shooting registers, but the shots seem to be off screen and not accurate. Sometimes I can get it to register on screen. But most of the time it’s not hitting the screen, even when I put the tip of the gun right up to my CRT. I suspect that the phototransistor in it has failed. But there aren’t any markings or pcb labels that indicate what specific diode it is for a replacement. Is there a way I can measure this to determine what replacemdntbpart to get? Or, anyone have or know of the schematics for this part? |
| Titchgamer:
I am assuming you have already tried these things but just incase :p Clean the lens and the ends of the sensors dirt can do weird things to light guns! Also tried turning the brightness of the TV up a bit? |
| opt2not:
Yeah, I should have mentioned I tried that already. Brightness up on the crt and in a dim room. Opened up the lightgun and cleaned everything. Still the same result. I’ve read that these diodes don’t last, so I’d like to find a replacement if I can just get the right part number. |
| Titchgamer:
--- Quote from: opt2not on March 10, 2019, 04:51:19 pm ---Yeah, I should have mentioned I tried that already. Brightness up on the crt and in a dim room. Opened up the lightgun and cleaned everything. Still the same result. I’ve read that these diodes don’t last, so I’d like to find a replacement if I can just get the right part number. --- End quote --- Figured you would of but had to check :p Afraid I cant help with the Electronics side of things, But there is a Electronics forum (forgot name sorry) where the members are very good at ID'ing parts from pics so they may be able to help. |
| pbj:
Have you removed the part? Probably has markings on the bottom of it... |
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