Over a year ago the left ramp flashers on Diner stopped working. There's 3 flashers on this circuit, two on the playfield and one in the backbox.
I replaced the driver transistor and all was good. A few weeks/months later I could smell something and noticed those flashers were stuck on.
I found the cement resistor on the interconnect board was burnt out and also the tip122 transistor.
I replaced both and also switched the flashers to LEDs,the game worked fine, went to Pinfest then on loan for a few months. All good till yesterday.
Yesterday I turned Diner on, for the first time in a few weeks in preparation for the comp on Saturday.
I noticed the left ramp flashers weren't working. Well, one was working but extremely dim (I imagine it was played when we had friends over and the flashers went unnoticed)
I found all 3 led flashers had melted
I thought maybe they had stuck on again, but upon putting incandescents in they worked fine.
Why would 3 flashers melt but the flasher circuit is working as normal, no blown driver transistor.
I've had 3 issues with the same flasher circuit in just over a year, so something must be amiss?
Could someone explain how flashers work in sys11s? I understand the later games on a basic level but not the sys11 interconnect board.
I replaced the driver transistor and all was good. A few weeks/months later I could smell something and noticed those flashers were stuck on.
I found the cement resistor on the interconnect board was burnt out and also the tip122 transistor.
I replaced both and also switched the flashers to LEDs,the game worked fine, went to Pinfest then on loan for a few months. All good till yesterday.
Yesterday I turned Diner on, for the first time in a few weeks in preparation for the comp on Saturday.
I noticed the left ramp flashers weren't working. Well, one was working but extremely dim (I imagine it was played when we had friends over and the flashers went unnoticed)
I found all 3 led flashers had melted
I thought maybe they had stuck on again, but upon putting incandescents in they worked fine.
Why would 3 flashers melt but the flasher circuit is working as normal, no blown driver transistor.
I've had 3 issues with the same flasher circuit in just over a year, so something must be amiss?
Could someone explain how flashers work in sys11s? I understand the later games on a basic level but not the sys11 interconnect board.