Jolin Tech ROSA Infinite Morpher Built Unit

Specifications

• Product Name: ROSA
• Build Guide Difficulty: 1
• Components: Control Board, Brain Signals Board, Front Panel

Hi fellow! Just a quick intro before starting,

what to have on hand

1. Soldering Iron with temperature control and an interchangeable tip
2. Solder wire
3. Small flat screwdriver
4. Knurled nut tool (optional)
5. Pliers (optional)
6. Multimeter (optional)

• If you want to refresh yourself a bit about soldering stuff you can watch this video2 by GreatScott! If you want to refresh yourself a bit about soldering stuff you can watch this video2 by GreatScott!
• A tool that can help you checking the components on the board is the interactive bill of materials. Rosa has 3 of them. One for each board.
• Download the .zip file on ROSA’s module page and unzip it. Inside you’ll find the .html ibom files. Open them with a browser. You can use them to check where a component is located on the board.
• Once downloaded it works fine also offline.

• The iboms show all ROSA components but most of them are already pre-soldered on the surface of the board (SMD). We just need to solder the through hole ones (THT) that are listed in this build guide.
• BE CAREFUL NOT TO TOUCH THE SMD COMPONENTS WHILE SOLDERING THE THT ONES
• It’s really easy to lose a tiny SMD resistor or capacitor. Pay attention when soldering parts that are close to other already in place.

1. All the components are basic and simple to locate and solder – the three stars are justified by the fact that on the board there are a few 0402 SMD components that need to be avoided when soldering. The trickiest part is soldering the 2.00mm headers: use a thin soldering iron tip. https://www.youtube.com/watch?v=VxMV6wGS3NY

• ROSA has three PCBs and a panel. Let’s begin with the control_board.
• 2.00mm pin headers and eurorack power socket

• Place the pin headers matching the drawing on the PCB. Longer pins need to point outside. Solder them.
• PLEASE DO NOT MESS WITH THE TINY AND HELPLESS SMD COMPONENTS ALREADY SOLDERED ON THE BOARD Then place the Eurorack Socket matching the drawing on the PCB and solder it.
• Check the pictures if you have any doubts.

tip:

• solder one pin and check. If the header or socked is aligned with the PCB solder all the other pins. Doing that later can be messy.

control_board standoff

• Let’s complete the control board, turn it over and follow these steps:

1. Insert the longest screw into the hole in the center of the PCB.
2. While keeping the screw in place with your finger, flip the board and slide on the thread one of the two washers.
3. Tighten with your hand the female-male standoff to the screw.
4. Store in a safe place the female-female standoff, the remaining washer and the short screw, we’ll need them later (they like to hide on the floor and they are so tiny it becomes an adventure picking them up).

jack sockets, toggle switches, potentiometers

• do not solder them yet: just place all of them in the right place and move to the next step.
• Toggle switches: to reduce clearance tighten one of the two nuts to the lever. You don’t need the round locating ring.

front panel

• Put the panel on and tighten the nuts.
• Now you can solder all the front panel components.

tip:

• we are soldering them now to ensure that all the mechanical parts are aligned with the panel. This reduces the stress to the components.
• The most common mistake at this stage is missing a solder joint or a “cold” connection. Check all of them one by one before moving to the next step.
• Now a mandatory pause: time to learn more about manual lever espresso machines. we just need to solder a few more bits on the brain_signals board.
• Grab the brain_signals PCB.

2.00mm pin headers

• Place the pin headers matching the drawing on the PCB3. Longer pins need to point outside. Solder them.
• PLEASE DO NOT MESS WITH THE TINY AND HELPLESS SMD COMPONENTS ALREADY SOLDERED ON THE BOARD Then place the Eurorack Socket matching the drawing on the PCB and solder it. Check the pictures if you have any doubts.

tip:

• solder one pin and check. If the header or socked is aligned with the PCB solder all the other pins. Doing that later can be messy.

• We are done with the soldering! Let’s stack PCBs.
• Ignore the SCAN text on the silkscreen. It’s from an obsolete component, we do not need it.

Instructions

the sandwich

• Stack the control_board and the brain_signal_board.
• Do not bend the PCBs, wiggle them back and forth until they match.

1. Place the remaining washer on the screw.
2. Tighten with your hand the female-female standoff
3. Stack the brain_scan_board to the other two.

• Do not bend the PCBs, wiggle them back and forth until they match.

1. Screw the remaining screw (the short one) in the standoff. the sandwich is complete.

knobs

1. Before placing the bigger knob (Rogan) on the D-shaped shaft, use the provided round brass adapter.
2. To screw the Rogan knob, use only the provided American standard hex key (the thick one, the other one is for the rail screws).
3. Place the other knob aligning it with the dent of the potentiometer and tighten its screw with a flat screwdriver.

jumpers

• Carefully fit the 4 jumpers4 as shown in the picture.
• THE TWO ROWS AT THE BOTTOM MUST BE LEFT EMPTY
• Any other configuration of these plugs may cause a malfunction of the module or its self-destruction.

before powering it up

• A good practice is to check the power header for shorts with a multimeter.

tip:

• follow this tutorial5 by Quincas Moreira – aka SynthDiyGuy if you have any doubts on how to perform the procedure.

1. Rosa has a predisposition for a dedicated expander (SPINE) and this pin header and plugs are the things that make their connection possible. https://www.youtube.com/watch?v=qS0SoIiiQCo

done! enjoy your new ROSA

find us:

• web ⇒ www.jolin.tech
• e-mail ⇒ info@jolin.tech
• build group ⇒ JolinLab
• STUFF Instagram ⇒ @jolinlab
• Youtube ⇒ ▷

Frequently Asked Questions

Q: Can I use a different soldering iron without temperature control?
A: It is recommended to use a soldering iron with temperature control to prevent damage to components due to excessive heat.

Q: What should I do if I accidentally touch an SMD component while soldering?
A: If you accidentally touch an SMD component, carefully inspect it for any damage. Replace it if necessary to ensure proper functioning of the product.

Documents / Resources

Jolin Tech ROSA Infinite Morpher Built Unit [pdf] User Guide ROSA Infinite Morpher Built Unit, ROSA, Infinite Morpher Built Unit, Morpher Built Unit, Built Unit, Unit

References

• User Manual