Questions
Will this work with my Roland Juno-G?
There are two types of display fitted to the Juno-G.
Type 1 was fitted by Roland at the time of manufacture. If your Juno G has never had it's display replaced you will have a type 1 display inside. If you have type 1, our display WILL work as a replacement.
Type 2 was sold as a service replacement part and required a software update. If your Juno G has had it's display replaced you may have a type 1 display inside but you probably have a type 2. If you have type 2 our display WILL NOT work.
Unfortunately I do not have pictures of the two displays to show the differences. But both displays can be seen in this users video.
The type1 display can be seen at 3 minutes 40 seconds:
https://www.youtube.com/watch?v=csoJSDTTnC4&t=3m40s
The type 1 display has two white ribbon cables, joined at a small PCB maked "Roland JUNO-G LCD BOARD ASSY". This PCB has two connectors and no other components.
The type 2 display can be seen at 4 minutes 2 seconds:
https://www.youtube.com/watch?v=csoJSDTTnC4&t=4m02s
The type 2 display has one long orange ribbon cable with a fixed PCB in the middle. This PCB has no connectors and several small electronic components.
The other way of finding out which type you have is to check what software is installed on your Juno G. Software Version 1.00 or 2.00 means you have the original type 1 display, but if you have software type 2.01, then you have a type 2 display. But of course you need a working display to check the software version!
Will this display work with any other Roland keyboards?
No. This is for the Roland Juno-G only.
Is this an official Roland part?
No. We manufacture this part. We have no connection with Roland.
What tools do I need and is it difficult?
All you need is a Number 1 Pozidrive screwdriver. It is advisable to use a small pot to put the screws in. If you are methodical and follow our instructions, it is fairly easy.
What comes in the kit?
The kit has a new LCD module and a replacement ribbon cable.
How long does it take to replace the display?
Most people will complete the repair in less than one hour.
Are there any differences between this display and the original Roland part?
Yes. There are several. This display is smaller than the original part. The Roland display was about 140*60mm & had 240*96 pixels. Our display is 84*57mm & has 480*320 pixels.
Think of it like having a smaller television. You get the same picture, but on a smaller screen.
There are three things you will notice.
- Our display doesn’t fill the whole of the window in the Juno-G case. You will see approximately 20mm of space on both the left and right of the display. Our PCB is coloured black to make this look as good as possible.
- Under the Juno-G screen there are six buttons. The function of the buttons is displayed along the bottom of the screen. On the original screen the function appeared immediately above the button. Because our screen is smaller the text on the screen no longer aligns with the buttons.
- The 240*96 pixel image is stretched to fill our 480*320pixel screen. It can look a little different, but don’t worry it is perfectly usable.
How long do you take to ship?
We quote two weeks from placement of order to shipment. Usually it will be much faster.
How long does shipping take?
The following are ESTIMATES from our shipping agent
- 48 hours within the United Kingdom.
- 3 to 5 working days to Europe. In the worst case, delivery can take up to 25 working days.
- 6 to 7 business days to the rest of the world. In the worst case, delivery can take up to 32 working days.
Please be aware that if you're not in the UK, the parcel will go through your local Customs and they could slow things up.
I've seen videos of people building their own displays, could I?
If you have a technical background, yes you could.
Our display is based on this Github project.:
https://github.com/dpeddi/LCDJunoG
If you decide to build your own, you will need good soldering skills, and you'll need to be techy enough to program a Raspberry Pi Pico. You'll need some tools: a soldering iron, wire strippers & wire. You'll be dismantling and canabalising the original display, and cutting PCBs with hacksaws. You may need to debug your efforts if you make a mistake.
If you are a competent engineer, building a display takes about two to three hours from scratch.
After all this, even if you are an expert with a soldering iron, you'll have a spaghetti of wire that will not be as reliable or look as good as our module.
If this sounds like fun, then you & I probably have a lot in common! If it sounds too complicated then you're in the right place. Our plug and play module was designed to make life a lot easier for you!
Please note : We do not supply parts or support for anyone choosing to build their own display.
Wow! The answer to that last question was very honest, won't you lose customers?
Well maybe. But that's OK.
Could I have your Gerber files (please)?
No.
What about using switch cleaner spray, heating my display or applying pressure to it?
You've been watching too much youtube! There are videos on all of these ideas.
OK, It appears that the problem with these displays is somewhere inside the display itself. There are two ribbon cables that disappear into the LCD, in my opinion these fail inside, where you can't get to them. The failure is intermittent, it comes and goes, but it does gradually get worse.
No amount of switch cleaner spray on connectors far away from the failing part can fix this. But opening up your Juno and putting it back together will disturb the failing part and it might make it appear to be fixed for a short time. Sadly since you've not addressed the real issue, you won't have fixed it.
Similarly heating won't do anything. Well actually that's not quite true. If you could get the display module hot enough to reflow the solder inside (between LCD screen and plastic backplate) you might cure the fault. Unfortunately the plastic backplate would melt and the LCD itself would be destroyed long before you got to the 300C needed.
Squashing the display, applying pressure to the back or clamping it front to back is actually a valid, temporary fix. If you apply just the right pressure at just the right place sometimes you can make them work. Essentially you're holding the broken parts together.
I'm sorry to tell you that once the original display starts failing, the only real solution is to put a replacement in.
What else do you do?
Running JunoG LCD is a hobby. I am a full time electronics engineer with over 30 years of experience in designing disk drive storage systems for data centres.
I live in England, I'm a keen kayaker and paraglider pilot, I drive a self built car and I have a house that requires several thousands of hours of work to renovate it.
I like to keep busy...
