Computer display of sorts (Kortek KT-2914DF)
It's attached to a 'Fast 'n Furious' video game.
Took far too long diagnosing the fault - no raster - as I assumed a catastrophic failure of the smokey type.
Found several high ESR caps including the one I fudged a while ago - these chassis have quite good caps except for C118 on the CRT heater supply - it fails very quickly and gives a dim display - I fudged it by hanging a cap off the neck board rather than take the chassis out as it's not easy to get out.
Put the chassis back in and now I can barely see a raster - crank up G2 and I can (sort of) see the menu - contrast/brightness at max - I clicked through the menu and noticed that colour temperature was 6500K rather than 9300K - changed it and 'bingo' raster back to normal.
Checked the other unit and both colour temperatures provide a good picture.
Anyone got any idea which chip controls colour temperature ???
I tried setting a user colour temperature but you can only access the green channel.
I'm asking as I'm a bit snowed under with repairs - got a Sanwa which caught fire !
Ta.
It's attached to a 'Fast 'n Furious' video game.
Took far too long diagnosing the fault - no raster - as I assumed a catastrophic failure of the smokey type.
Found several high ESR caps including the one I fudged a while ago - these chassis have quite good caps except for C118 on the CRT heater supply - it fails very quickly and gives a dim display - I fudged it by hanging a cap off the neck board rather than take the chassis out as it's not easy to get out.
Put the chassis back in and now I can barely see a raster - crank up G2 and I can (sort of) see the menu - contrast/brightness at max - I clicked through the menu and noticed that colour temperature was 6500K rather than 9300K - changed it and 'bingo' raster back to normal.
Checked the other unit and both colour temperatures provide a good picture.
Anyone got any idea which chip controls colour temperature ???
I tried setting a user colour temperature but you can only access the green channel.
I'm asking as I'm a bit snowed under with repairs - got a Sanwa which caught fire !
Ta.
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