Roland Cube 60XL - No Sound, Blown Pre-Amp?

[dino239]

Hi Everyone,

New to this, and just got a Roland Cube 60XL Bass, and plugged my synth into it - it sounded great for an hour or so, and then pop - now no sound at all.

I now know the following :-

• I should NOT have plugged the keyboards output, into the Bass input, as it is too "hot". And I definitely should NOT have used the keyboard volume to make it go louder - like I said, it did sound good while it lasted.
• I SHOULD have plugged the keyboard into the AUX-IN on the back - only reason I did not, was due to lack of proper cable, doh.

So the amp is like mint condition, so am keen to repair - it powers on, lights up, and led's seem to respond by turning dials etc, just no sound at all whatsoever.

Have also tried the aux-in now, but no sound there either - I had thought that if I blew the pre-amp, then the Aux-in would still work, have I missed something?

I have tried to find the circuit diagram for it, to no avail - I did find an 80XL though, is that good enough, as I have a friend who has said he can teach me how to repair it, if I can find the diagram?

Any help or pointers in the right direction would be most appreciated.

Thanks in advance guys.

[g1]

Have you tried with headphones?
Post a schematic request in the 'schematic requests' section.

[The Dude]

If the 60 is similar to the 80, it looks like there are separate fuses for the LV and HV rails. I would first look to see if any fuses are blown. If so, it might give you an idea of where the fault is.

Edit: Here's a link to the disjointed 80XL schematic (in case it's the same or similar).

https://usermanual.wiki/Collections/...atics.pdf.html

[sugeda]

https://docdro.id/maHEhSY