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Arcade Lifestyle / Re: :: ROAD TRIP :: BUGGY BOY by TATSUMI [presented in triple screen]
« on: September 11, 2015, 05:44:28 PM »
I've received the polo board :
there is a lot of dust
After a shower, I can work on it :
When I've power it, there are sparkles on the strap p133
I look the bottom of the board and I found that the pcb was burn around p133, r167
I've clean this area, and cut a useless track (from net -190V for the Xray protector) :
I've replace a rusty resistor & a leaking cap :
Now there is no more sparkle, but the vertical deflection is still missing.
I've check the TDA1675A :
- power is good 25V (stable)
- verticales pulses arrived at the sync IN
But the oscillator didn't start, there's no ramp at the pin 9, I think that the amplifier was died, I've to found a new one.
there is a lot of dust
After a shower, I can work on it :
When I've power it, there are sparkles on the strap p133
I look the bottom of the board and I found that the pcb was burn around p133, r167
I've clean this area, and cut a useless track (from net -190V for the Xray protector) :
I've replace a rusty resistor & a leaking cap :
Now there is no more sparkle, but the vertical deflection is still missing.
I've check the TDA1675A :
- power is good 25V (stable)
- verticales pulses arrived at the sync IN
But the oscillator didn't start, there's no ramp at the pin 9, I think that the amplifier was died, I've to found a new one.
:
