The saga continues, but more confusion.
As stated earlier, this inverter board will fire up the two CCFLs which are series connected as in my sketch.
The off load voltage is 8,200 V pp (3,900V rms), falling to 3,100V pp (1,095V rms). The tubes from the Toshiba 23" LCD measure 20" each, so I expect it to light up the 28" tube from a 32" LCD, and the 35" tube from the 42" LCD.
Not so! Once again, just some excitation at the ends, but no proper illumination. I really can't explain this; I even tried linking two sections in the hope of increasing the output level, as I did with the Samsung inverter earlier, but no luck this time.
Oh well! At least I have two testers for shorter length CCFLs.
The search continues.
Les.
