FDP Home Page / FDP Forum / FAQ's

The FDP is made possible by the following companies and individual members like you.
Please use the links below to show them we value their sponsorship.

Apex Tube Matching

MOD KITS DIY

Amazon

WD Music

Amplified Parts

Guitar Center

Sweetwater

Antique Electronics Supply

Jensen Loudspeakers

Musician's Friend

Yellowjackets Tube Converters


* God bless America and our men and women in uniform *

* Illegitimi non carborundum! *

If you benefit and learn from the FDP and enjoy our site, please help support us and become a Contributing Member or make a Donation today! The FDP counts on YOU to help keep the site going with an annual contribution. It's quick and easy with PayPal. Please do it TODAY!

Chris Greene, Host & Founder

LOST YOUR PASSWORD?

......................................................................

   
FDP Jam
Calendar
Find musicians
in your area!
  Search the Forums  

FDP Forum / Amp Mods, Repairs, and Projects / Roland Cube 60 (SS) Lead channel oddity

archiestone
Contributing Member
**********
*

El Californio

Jan 28th, 2018 03:15 PM   Edit   Profile   Print Topic   Search Topic

Clean channel works fine, Lead channel locked on one setting (fortunately a usable one - Tweed.) Rotary channel switch won't dial in other amp modes. Vol and gain are working.
I've never had an SS amp problem before -- wouldn't know where to begin. Amp was not dropped or abused so I have no idea why it's doing this.
Any suggestions? Willie?

willie
Contributing Member
********

Too Near Atlanta GA

Amp Tech Emeritus
Jan 28th, 2018 03:47 PM   Edit   Profile   Print Topic   Search Topic

Is this the Roland Cube 60 COSM model? There have been several Roland Cube model amps...honestly, I have very little bench time on Roland amps over the years. I would suspect that the COSM amps might well be surface mount (SMT) versus the older through hole technology which makes servicing a lot more complex. More than likely there is a switching component that has failed....a JFET or similar. These amps don't lend themselves well to servicing by other than Roland techs...unfortunately. They are well worth repairing though...great amps.

willie

archiestone
Contributing Member
**********
*

El Californio

Jan 28th, 2018 04:31 PM   Edit   Profile   Print Topic   Search Topic

Thanks, I love it as an office & bedroom amp. Acoustic channel is quite usable too -- when it works! I'll let you know...

(and yes, it's a COSM model.)

(This message was last edited by archiestone at 10:28 PM, Jan 30th, 2018)

Peegoo
Contributing Member
**********
**********
********

Tried vegetarian:

miss steak.
Jan 28th, 2018 08:40 PM   Edit   Profile   Print Topic   Search Topic

If it has a foot switch jack for switching between clean and lead channels, try plugging a TRS plug into it and see if that changes the behavior.

willie
Contributing Member
********

Too Near Atlanta GA

Amp Tech Emeritus
Jan 28th, 2018 09:04 PM   Edit   Profile   Print Topic   Search Topic

Good suggestion....

w

archiestone
Contributing Member
**********
*

El Californio

Jan 30th, 2018 05:54 PM   Edit   Profile   Print Topic   Search Topic

Peegoo, You got me all excited with your suggestion!... but, alas, no change.

Peegoo
Contributing Member
**********
**********
********

Tried vegetarian:

miss steak.
Jan 30th, 2018 10:55 PM   Edit   Profile   Print Topic   Search Topic

Sometimes the rotary encoders go bad on these things too. Find a Roland service center and get it checked out. These amps rarely go down for service.

willie
Contributing Member
********

Too Near Atlanta GA

Amp Tech Emeritus
Jan 31st, 2018 09:24 AM   Edit   Profile   Print Topic   Search Topic

Fact...

w

Leftee
Contributing Member
**********
**********
*

VA

Life makes a man tired.
Feb 1st, 2018 02:46 PM   Edit   Profile   Print Topic   Search Topic

The rotary encoders on my (now) old PV Vypyr are giving up the ghost. I think it's time to move on.

She served well. I bought it (and the footswitch) cheap from CL.

Next!

archiestone
Contributing Member
**********
*

El Californio

Feb 8th, 2018 03:50 PM   Edit   Profile   Print Topic   Search Topic

FYI - I took it to a Roland auth repair guy who diagnosed it as requiring a completely new "computer" (his word.) Unfortunately the cost is more than the amp's worth -- but it's still very usable as a 'JC Clean' bedroom amp and the fx still work so I'll just live with it until a used one shows up on local craigs which they do from time to time.

FDP Forum / Amp Mods, Repairs, and Projects / Roland Cube 60 (SS) Lead channel oddity




Reply to this Topic
Display my email address             Lost your password?
Your Message:
Link Address (URL):
Link Title:




Moderators: Chris Greene  Iron Man  reverendrob  

FDP, LLC Privacy Policy: Your real name, username, and email
are held in confidence and not disclosed to any third parties, sold, or
used for anything other than FDP Forum registration unless you specifically authorize disclosure.

Furtkamp.com 
Internet Application Development

Copyright © 1999-2018 Fender Discussion Page, LLC   All Rights Reserved