Hello

Am 15.11.2015 um 01:55 schrieb cl90009@... [tr-707]:

> I have a TR707 that's functional other than the display is very dim. I
> have a 12V 1800mA adaptor (albeit not Roland), and two fresh batteries
> in the unit. Dismantling it, I measure +5.1V and -10.6V (the latter of
> which seems a bit high) on the main board, and the same +5.1V on the
> display board. The two resistors which (I think) control the contrast
> are both in spec at 330k, and I've also cleaned the contacts to the
> LCD with contact cleaner.

Are you sure, that it is mor "dim" than usual I always found the
display having not that much contrast, that you would expect from a
modern (not backlit) display. I own from the later TR-Series a 707,
727, and the 505 and I have a DR 550MkII. And the DR-550 has a much
better contrast than the three TRs.

Florian