Hello. I need to repair this flashing circtuit



R6 is a bit overheated, I have measured 468 ohms, but I don´t know if afeter being in this state that is its real value. Impossible to read de colors.
Also D2 is missing, The leads are cut, but it doen´t make sense, it is like it was removed by the manufacturer. And C7 (the big one in the bottom next to the red and black wires, it isn´t the original so it would be good to know its value

How could I know the values of these componentes?

Thank you

Best regads

 

buy another. then you have something to compare to.

 

It is very old. And no idea how do find another one

 

Replace D2 with the same diode that's right next to it and try 480 ohms for R6. What's special about this strobe light that you can't buy another?

 

The owner asked me to repair. Thanks for the help. I'll try that

 

I see. You doing good work for someone else. Try to trace the surrounding circuitry of R6 and see if you can't identify the purpose of R6 and the two caps next to it. Post your findings if you want.

 

A more clear image of the bottom side of the board.

Part numbers for the three IC's.

It looks like there is a heatsink clipped onto a TO-220 part, probably a power transistor. It might help to know that part number. If you de-solder the heatsink's two pins, you might be able to pull it off of the transistor without having to remove the transistor from the board.

ak

 

Is this a single flash photographic device or a flash-rate controlled stroboscope device??

 

Is the voltage across the flash capacitor correct? are the primary and secondary windings of the trigger transformer both showing continuity? Does the trigger pulse reach the trigger transistor? I had one strobe the transistor short circuit failed and then the trigger transformer primary failed open.

 

Thanks you all for your help.

I replaced the resistor and the missing diode and one burned transistor with the same that was next to them and it worked!!