20 Most Recent Roland Juno-D Questions & Answers

Have you tried the pedal straight into the amp without going thru the Roland?

Does the sustain pedal turn on with the foot pedal or is it a separte stomp switch to turn it on?

The information is in the manual. You can download a copy here- JUNO Owner Manual JUNO Manuals Support Roland

I don't have any of that gear, but check that an option like "note on/off" is turned on in the MIDI setup menu on the Juno-D. Also check in Logic that it's midi is setup right. Logic could also be receiving sustain pedal MIDI info from the Juno. Anyway, that's all I got.

There are lots of IC's in the unit. Order from Roland support parts. That will be the only source.

Oh great... WORSE thing you can do is to spray in Deoxit or Blue shower contact cleaner inot pots or faders!!!! It destroys the lube on the resistance element !!! The ONLY place to use those products is on metal switch contacts.

You have ONE chance to try and restore it without replacing it...

Go to Home Depot and in the electrical dept find a can of CRC226 (about $2.70 Bluish can) Use ONLY this product CRC226 as there are other CRC products there that are NOT applicable to this problem...

Now with the spout flush this down where the other cleaner had been put and work the control... Worse case is if you can't get enough into it you might have to open the case to get at a place you can spray into the pot where the lead wires go into it...

I use CRC226 to restore volume and gain pots in many guitar amps that become noisy. Usually I do it from inside the amps where I can get to the slot where the leads go into the pot. The product is for electrical stuff and is a water displacer but not gunky like WD40... never use that product in controls or switches... it is essentially fish oil. CRC226 is also goo to protect tools from rust.

I hope you can fix your unit without replacing the pot...

First though, flood a bunch in and then TURN the keyboard upside down so the CRC226 floods over the resistance element inside the control and work the control.

In case you need to replace the pot here is the info and part number from Roland.:

5 02455234 POTENTIOMETER 12M/M ROTARY POT. EVJY15F02B14

Here is an Avnet catalog page but they only do large orders of 1200 which is 1199 more than you need.

http://avnetexpress.avnet.com/store/em/EMController?action=products&term=EVJ%252DY15F02B14&Nn=25&cat=1&N=4294609562+100257&langId=-1&storeId=500201&catalogId=500201&hbxSType=Within+Search&x=21&y=4

The pot is a Res POT 10K Ohm 20% 1/20W 6mm Pin Snap-In It will be a "B" taper audio type.

Here is link to your service manual for the Juno D:

http://elektrotanya.com/roland_juno-d.pdf/download.html

Check the power adapter at the coaxial plug end that plugs into keyboard- is there power there? If so, is the socket on the keyboard loose at all? If so- the socket may be broken, If there is no power there, you either need a new power supply or you need to open it up to see if it is just the fues in that supply that failed. If the plug inserts snugly as it did when new and it dopes not power up, the issue may be the power switch on the back- it may have dirty or corroded contacts- cycling the switch on and off several times rapidly should clean it. If it still does not power up, there should be a fuse internal to the keyboard that would require you open it up to check it. If it is not under warranty, this is not an issue- if it is under warranty, it is something that should be checked in the shop.

Take it in for repair. There may be a broken line for the velocity sensing of that octave of keys that is causing the velocity to be sensed low. The repair is NOT DIY if this is the case.

Roland requires a pedal that is normally closed, open sustains. MOST pedals work the opposite. SOME pedals you can open and rewire... but not all can be.

Did you clean these contacts with ONLY isoprophyl 99% alcohol and Qtips? If you used another product you may have spoiled the contacts. Also did you clean the circuit board where they contact with the same product?

If you used another cleaner, best to redo your work... quickly... Contact cleaners such as Deoxit and Blue shower destroy this type contact.

Probably defective switches... Take in for repair. Iwoudl NOT recommend DIY for this particular problem.

The manual is here, in .pdf format:

 

www.rolandmusic.ru/getfile/shop/117/E-16_english.pdf

 

 

The key contacts have become contaminated. Disaasemble and find the contacts under silicone rubber domes. They are typically black conductive rubber pills, two per key. Clean them and the circuit traces they press against under them with ONLY 99% isoprophyl alcohol and Q Tips GENTLY. Then reassemble and test operation.