A little more localized.. I use one similar to this.....
Swap your leads around if the (-) bothers you..:biggrin:
Only 4 transistors.
Or maybe a cold solder connection in the DC supply.
Power supply.. Do the lamps flicker when its crackling ? ( power switch arcing )
I think your function switch is similar to this switch.
If there all dead (lamps or whatever) your probably missing the 11.3 vac from the power transformer. All 6 are wired in parallel. Or ...... They...
Does it look like someone has modified the display with LED's ? There should be 6 incandescent lamps stuffed into reddish colored rubber condom/...
Does your Bar graphic illuminate on either channel ?
Each LED segment looks like 2.5 vdc..
The OEM backlight lamps are 14.5v @ 115ma.
Yes. The manual calls it a schematic.
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