Dim bulb tester power up. OK.
Speakers connected and signal testing ipod to TP2. I have the volume motor disconnected, so manually adjusted the volume slider to 0. Very very loud output volume. No light from volume control. Powered down, tweaked cables to PCB 2, the control board. Powered up, volume light now on, adjusted to just above 0. Still loud and distorted. Turned volume very low on ipod, distorted sounding still. Switched to FM, very very very loud, dimbulb started getting bright. Switched off. TP 2 again, playing as it was before requiring low volume from iPod. Adjusted bass and treble, working appropriate. Adjusted balance and very loud, dim bulb tester- bright dim bright dim. Poor little test speakers.