Hi - me again
I posted a couple of days ago with this problem and it was suggested I checked the VFD soldering - done that and its all good. I still have the same problem though - the Amp turns on and there is no display. After 15 minutes or so the display fades in slowly and if I quickly cycle the power to the amp the controls appear to work again for a while. The same happens with the radio VFD when connected (external Aiwa unit).
I've tested the VFD voltage from the regulator and when it is working I get around 30 volts which appears within spec. When the display is dead I get around 1.6 volts. This leads me to think that maybe the regulator for the VFD has a problem.
Euras appears to have a fix for the problem but I dont have access to it (symptoms are exactly the same - locked up control panel until the display gets going as well).
Any ideas or schematics ? The VFD regulator circuit looks like it might have got a little warm at some point but without schematics etc I'm a little stuck (I'm a digital electronics engineer with limited analogue knowledge).
Thanks all again
Dom