mimo Posted September 10, 2010 Share Posted September 10, 2010 I finally located an original Scart lead for my French RGB 7800, colours were over driven so I gave the colour trim pot a tweek (located at R42 on a Rev C PAL board), the top metal piece broke off and now I have no Colour at all. Are replacement trim pots available off the shelf? anyone know the value? can I do anything else to rescue this 7800? Quote Link to comment Share on other sites More sharing options...
GroovyBee Posted September 10, 2010 Share Posted September 10, 2010 Are replacement trim pots available off the shelf? anyone know the value? can I do anything else to rescue this 7800? Its R57 @ 500k on my PAL schematic. They should be cheaply available from Farnell, RS, CPC or even Maplin. Although the last time I checked Maplin they were pretty dire on the component front. Quote Link to comment Share on other sites More sharing options...
mimo Posted September 10, 2010 Author Share Posted September 10, 2010 thanks Quote Link to comment Share on other sites More sharing options...
mimo Posted October 2, 2010 Author Share Posted October 2, 2010 replaced the trim pot but still no colour. There was colour for 3 or 4 minutes but when I swapped the cart colour went. Cant get it back now. Any more ideas? Quote Link to comment Share on other sites More sharing options...
GroovyBee Posted October 2, 2010 Share Posted October 2, 2010 Follow a trace from each leg on the pot to another part on the circuit. Then check it for continuity from the top side. You might have broken a track. Quote Link to comment Share on other sites More sharing options...
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