Bally Flash Gordon Strobe

[PinPal]

Hi all, haven't posted here for a while but I would like sum help with my Flash Gordon strobe.
Was working fine until recently when I noticed it will only flash intermittently.
Tested it in lamp test mode and it will occasionally flash but not its usual one flash after another.
Took the board out and re flowed solder on the pins and checked the driver transistor on the master display board still no change. 
Am not the best at measuring voltages so I think something has gone bad on the strobe board.


Any ideas


Thanks,


Pinpal....

[Crashramp]

Sorry board work is not really my field of expertise either. I have read that the high voltage will remain on this board even after powering off so be careful when removing it. If you don’t have any luck repairing it replacement boards are available. I replaced mine about 4 years ago and it’s never missed a beat/flash!

[PinPal]

Yes, I did read up on this board and was aware of the high voltage so I was careful when I re flowd the solder.
Did find a new bord available in the U.S. but as you no the postage cost is a killer.


Pinpal.

[Crashramp]

Yes postage is ridiculous. Hopefully it’s just something simple with your board.

[Strangeways]

Usually resoldering the connector pins solves intermittent issues as described.

[aurum]

Just had a quick look at the schematic and there's not much that can go wrong. Can you power it up and carefully measure the voltage on the two caps - C2 & C3. They should be around 115*1.414 or approx 162V DC. High voltage capacitors like these tend to be the thing that fails.


Mike.
Schematic for anyone interested.