Roland Cube60

[drewl]

Anybody work on any of these yet?
I've just done pots and jacks on them but I have one here with no output.
I'm guessing the power amp module or something around it since it works up to the headphone output but no speaker out.
Any info would be apreciated.
Thanks, Andrew.

[52 Bill]

...it works up to the headphone output but no speaker out.

Are you saying that the headphone out works?

I haven't seen one of these in a few years, but from what I remember the headphones are driven by the power amp, so if they work the power amp should be ok. Check the speaker, speaker wiring and the switching contact on the headphone jack.

(EDIT)
Sorry...
I just double checked the owner's manual and while there is a speaker shut off on the phones jack, the headphones apparently are not driven by the power amp.

[drewl]

yeah, it seems in the older ones the headphone out was driven by the power amp.
The schems for those are around.
The newer ones are quite different with an output module and a bunch of surface mount stuff and digital.

[oc disorder]

Here you go.... Headphone socket has internal switch for speaker in this one
Sanken 2SA1215 = Hitachi 2SB700
Sanken 2SC2921 = Hitachi 2SD736

The holes on the large "batwing" transistors match.
Need longer mounting bolts as the Sanken are thicker

Although this is probably superfluous if the o/p stage is working ...."That's the old one, oc." well its completely
superfluous then but I'll leave it for reference...
The old ones sound better than their new stuff but don't quote me...

[Enzo]

That's the old one, oc.