Roland Juno-D - Page 2 - Answered Questions & Fixed issues

I would recommend taking it in to be repaired. If they service Roland products they will have access to any parts it needs. It sounds like the key contacts are damaged or dirty. In either case it is not easy to disassemble the Juno because of the internal wiring. It needs to be reassembled perfectly for it to work properly and it is easy to damage something during disassembly. Hope this helps.

This is probably normal. The sound generators need to re-configure when changing voices. This means that while one set is generating the old voice, others have to be set to the new and the old cancelled. The sound has to be muted between the setting changes... this takes a fraction of a second to do in the hardware. The only solution is to use two synths and have each set to the sounds you want. MANY musicians rack up two synths just for this purpose.

Check if headphone output is normal... sometimes the headphone jack switch fails and doesn't send to speakers when headphones are unplugged.

Simple way is MIDI out from Juno to MIDI in on MPC, then (depending on how you want to work), connect MIDI out from MPC to the in on the Juno. If you do this you MUST turn local control off on the Juno or else you'll get double triggers (internal + msg in from MPC). Now to record sequences on MPC , set MIDI to as track in setup window (on the 2500, this is accessed by pressing MODE then pad 9, then press button under the corresponding tab [on LCD]) then set your MIDI channel by port, meaning if your MIDI cable is physically connected to out A, in your LCD in bottom right corner it will show as follows: 1A. This indicates you are transmitting on MIDI channel 1; port A. Remember, MIDI IS NOT AUDIO!!!!! Since the Juno is a synth and not a workstation, all transport controls are handled by the MPC, that's pretty much it... Hope this helps a little, enjoy!

P.S. Go to mpc-forum.com its THE sh**! They also have links for their e-book I have one for the 2500 and its awesome!!!

The schematics I found for the Juno D do not show any battery.

The vibration (mechanical) is probably either bouncing foreign material around that shorts something OR flexs circuit board that has crack in it causing intermittent contact.

You need to open the unit and find the exact cause since if it is foreign material, for instance a paper clip, that can do permanent damage if it gets in the wrong place... A cracked circuit board or loose connector needs repair.

Try asking someone on the forum here:http://www.vintagesynth.com/roland/xp60.php

Here is the link you need but pay absolute attention to the Please note section in each case as the Juno D LE and the original Juno D are different. If you install the wrong update you will have problems with the keyboard working at all.

Your key contacts are dirty. Disassemble and clean both the circuit traces and the conductive rubber pills with ONLY 99% isoprophyl alcohol and QTips.

The contaacts are in pais which allows for measuring key velocity. When contacts are dirty, this affects the loudness.

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

Plug audio cables into the L/mono and R jacks on the back to connect to your amp stereo input.

record songs with a midi sequencer. the d beam is fun but not very useful!

i think you need new membranes, they are hard to fix.

juno, lovely instrument, try the synthesizer repair centre in london

you could try using 2 midi channels for two sounds.

If you have the new Juno here is a link to their update:http://www.rolandus.com/products/productdetails.php?ProductId=429 Also try looking in your manual for the initialisation procedure. This will return your keyboard to the factory settings .

You either did not get the ribbon cable seated OR got it upside down.

If this cable is the flat ribbon with exposed solder plated points of contact, OFTEN those connectors have a latch to release by GENTLY moving tabs on eaither side in the direction of pulling the cable out. This lock MUST be moved out slightly to allow the cable to seat properly. The solder plated contacts will be FULLY into the connector when seated properly.

These cables ALSO can be inserted backwards and NO connection will be made.

The conductive rubber pill contacts AND the traces oin the circuit board should be cleaned with 99% isoprophyl alcohol, nothing else. Use a Q-Tip moistened with the alcohol.

Normally you have to clean the conductive rubber "pills" AND the circuit board traces they get pressed down on.

USE ONLY 99% isoprophyl alcohol on Q-Tips to do the cleaning and be gentle.

Use of other product like deoxit and other contact cleaners will wreck the contact material.

i would suspect it will not stand the extra heat. i am familiar with electronics but not that particular device. does it have a cooling fan and if not it would be handy if you can install one or if it does have one it needs to be cleaned. have you had any other issues using it inside ?

robert