alexisonfire Posted January 2, 2011 Share Posted January 2, 2011 (edited) Hi, The other day I was wiring some new pickups into my bass, I then went to test it (stupidly) through my rig and ... POP. The status light on the front panel is now flashing from red to green. The user manual does not specify what type of issue this warning represents. Before I take it to a tech, does anyone know what this could possibly be? Cheers. p.s all the tubes are still glowing. Edited January 2, 2011 by alexisonfire Quote Link to comment Share on other sites More sharing options...
MarkBassChat Posted January 3, 2011 Share Posted January 3, 2011 [quote name='alexisonfire' post='1075585' date='Jan 2 2011, 08:44 PM']The status light on the front panel is now flashing from red to green. The user manual does not specify what type of issue this warning represents. Before I take it to a tech, does anyone know what this could possibly be?[/quote]The problem is described in the user manual - page 4. What about the bias indicators on the back - are they green or red? Mark Quote Link to comment Share on other sites More sharing options...
icastle Posted January 3, 2011 Share Posted January 3, 2011 [quote name='alexisonfire' post='1075585' date='Jan 2 2011, 06:44 PM']The other day I was wiring some new pickups into my bass, I then went to test it (stupidly) through my rig and ... POP. The status light on the front panel is now flashing from red to green.[/quote] Now't stupid about that - just about everybody on here would have done exactly the same thing [quote name='alexisonfire' post='1075585' date='Jan 2 2011, 06:44 PM']The user manual does not specify what type of issue this warning represents. Before I take it to a tech, does anyone know what this could possibly be?[/quote] Not sure which manual you are looking at but the main operators guide (http://www.ampeg.com/pdf/SVTCL_OM.pdf) is saying that you have a power amp stage problem. [quote name='alexisonfire' post='1075585' date='Jan 2 2011, 06:44 PM']p.s all the tubes are still glowing.[/quote] The bad news is that although glowing tubes can provide a quick way of checking that valves are working, it's not at all accurate. All the glowing means is that the heater section of the valve is working - the rest of it may be dead. The good news is that Ampeg have rather considerately put diagnostic circuitry onboard and the red/green flashing LED might save you a trip to an amp tech! As a starting off point I'd take a look at the section entitled 'Setting Tube Bias' on Page 7. Work your way through those instructions (don't be tempted to take shortcuts!) and if you don't get a result from that then change the Power tubes and do the 'Setting Tube Bias' section again. HTH Quote Link to comment Share on other sites More sharing options...
GarethFlatlands Posted January 4, 2011 Share Posted January 4, 2011 Have you tried replacing the output fuse? You might just have tripped it, esp. as the tubes are all still coming on but presumably no sound is coming out. Quote Link to comment Share on other sites More sharing options...
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