JX-3P MIDI Expansion Kit Owners manual and installation instructions Language: English Manual Version: 2.01 Date: 5 june 2010 Website: http://organix.inque.org Email: organix@inque.org * Roland is a registered trademark of Roland Corp.
JX-3P MIDI Expansion Kit Introduction Thank you for choosing the JX-3P MIDI Expansion Kit from Inque. The JX-3P MIDI Expansion kit adds more MIDI functionality to the JX-3P Synthesizer. When you do not have a PG-200 programmer, you can: Control the JX-3P realtime with standard MIDI-Control messages. These messages can be sent from a sequencer or a “MIDI-knobbox”. Load new patches in the JX-3P using a MIDI-file containing MIDIControl messages. Set the MIDI receive channel to 1, 2, 3 or OMNI.
JX-3P MIDI Expansion Kit Precautions Please read the manual carefully before installing the kit! Caution The installation of the kit requires opening the JX-3P synthesizer case. Some knowledge about electronics and soldering is required. If you don’t have this knowledge and skills, please let a competent person do the installation for you. There are high and dangerous voltages inside the JX-3P, please follow the general safety precautions. Look out with static electricity.
JX-3P MIDI Expansion Kit Chapter 1. Opening the bag The DIY version contains: All electronic parts, pre-programmed microcontroller, double-sided PCB and a enclosure to build the mergerbox. Pre-programmed firmware ROM that must be installed in the JX-3P. 10-pins cable with connector. The pre-build version contains: A pre-build mergerbox. Pre-programmed firmware ROM that must be installed in the JX-3P. 10-pins cable with connector.
JX-3P MIDI Expansion Kit Chapter 2. Assembling the DIY version This chapter only applies to the DIY version. If you have the prebuild version, you should proceed with chapter 3. If you have the DIY version then the PCB of the mergerbox needs to be assembled by you. Assembling the PCB requires suitable soldering equipment and tools. The holes and pads on the mergerboard PCB are much smaller than those used on the DIN Board in the JX-3P.
JX-3P MIDI Expansion Kit Please follow the following steps: Mount the resistors: R1 and R4: 220 Ohm. (Red – Red – Black – Black) R2 and R3: 1K. (Brown – Black – Black – Brown) Mount the IC socket (U1). Pay attention to which direction the socket must mounted. If you mount it the wrong way, it can be confusing how the IC must be inserted, resulting inserting the wrong way and a damaged IC. Mount the LED (D1). Pay attention to which way the anode ‘A’ / cathode ‘K’ is pointing.
JX-3P MIDI Expansion Kit black wire must correspond to ‘A’, the brown wire to ‘B’… and the white wire to ‘J’. Mount the electrolytic capacitor 10 uF on location C3. Pay attention to the polarity!!! If you mount it the wrong way, it can explode. Insert the IC ‘Atmega8’ into socket U1. Pay attention to which direction it must be inserted. You could use some special PCB Cleaner spray to clean the PCB from solder flux, and give it a clean look.
JX-3P MIDI Expansion Kit Chapter 3. Installation in the JX-3P This chapter applies to both the DIY and pre-build version and describes the following actions: Opening the case of the JX-3P Synthesizer. Installation of the new firmware ROM. Modification of the DIN board. Installation of the mergerbox. The following things are needed for the installation: The firmware ROM. The mergerbox The 10-pins cable with connector. Also needed (not included with the kit): A soldering iron.
JX-3P MIDI Expansion Kit Step 3. Turn the JX-3P upside down and remove the screws which are drawn in the picture below. Step 4. Turn the JX-3P upside back. Be careful, since the keyboard will be lose and could fall out. Remove the screws on the sides (a total of four screws). After this the front panel will be open.
JX-3P MIDI Expansion Kit Step 5. Rotate the front panel to the rear side. Make sure that there will be no cable damages. Remove the keyboard. You do not have to unplug the cables coming from the keyboard. From this step there are three actions that should be completed: Change the firmware ROM. Modify the DIN board and attach some cables to it.
JX-3P MIDI Expansion Kit Step 6. You can find the firmware ROM at the lower left side of the mainboard (IC52). The type will be 2764 or 2365 (sometimes with a label on it). If the firmware ROM is soldered on the mainboard, you need to desolder it and solder a IC-socked at the location. This action is not described further in this document. Carefully remove the old firmware ROM. Because the new firmware ROM has an larger chip capacity, an extra (address) line must be added from the CPU to the ROM.
JX-3P MIDI Expansion Kit Place the new firmware ROM in the socked. Take attention of the direction of pin 1! Wrong inserting of the IC could be damage the IC and other components in the JX-3P! Keep the original firmware ROM in a safe place. Step 7. Remove the DIN board from the upper side of the front panel. Remember the location of the three connected cables (CN1 JACK, CN2 POWER and CN3 MAIN). Tip: you could write the numbers on the connectors with a water-resistant marker.
JX-3P MIDI Expansion Kit Step 8. This step describes how to modify the DIN-board. There are two versions: one with MIDI-Thru and one without MIDI-Thru. Both PCB layouts are given on the following pages. The modifications on both boards are the same, only the locations are different. Cut the PCB connection at point 1 and 2. Scrap off a small portion of the coating using a screwdriver or a knife, until you see some copper. Use an Ohmmeter to make sure that to PCB connection is really cut in two.
JX-3P MIDI Expansion Kit DIN-Board without MIDI-Thru output Page 14
JX-3P MIDI Expansion Kit DIN-Board with MIDI-Thru output Page 15
JX-3P MIDI Expansion Kit Step 9. Verify that all the connections are done correctly. You can bind the wires together with tape. Place the DIN-board back into the front panel and attach the three connectors to it. Connect the 10-pins cable connector to the small plastic box. Mount the plastic box with double sided tape on the backside of the front panel, next to the DIN-board. Take attention that the electronics box will not collide with the power supply when the case is closed.
JX-3P MIDI Expansion Kit Chapter 4. MIDI Channel select After installation the memory protect function will be always off. The function of the PG200 / MIDI switch on the backside will be changed after installation of the kit. The switch will function as a MIDI channel selector. Switch position PG200 MIDI channel 1 PG200 protect MIDI 2 3 The JX-3P selects the (new) MIDI channel after power up. Varying the setting of the switch while powered up does not change the MIDI channel.
JX-3P MIDI Expansion Kit Chapter 6. Troubleshooting and FAQ Q: How do I know that the JX-3P will work in my JX-3P version? A: Generally, there are two versions of the JX-3P: The non-MIDI-Thru and the MIDI-Thru version. Both versions are supported by the JX-3P MIDI expansion kit. The kit has been installed in a variety of JX-3P's in the past, in all cases without problems.
JX-3P MIDI Expansion Kit Q: Why is the LFO Delay not working when I play a note through MIDI? A: This is a classic bug from Roland in the original JX-3P firmware. There is nothing I can do about it, I'm afraid. Fortunately the bug was fixed in the velocity mode. But in the normal mode, it is still there... Q: I know that the resolution of the parameters on the PG200 are 8-bit.
JX-3P MIDI Expansion Kit Chapter 7. MIDI Specifications MESSAGE TYPES Note event Note off Status 8nH 9nH kkH: vvH: Second kkH kkH Third vvH 00H Note number 24H – 60H (36 – 96) C2 – C7 Don’t care Note on Status 9nH kkH: vvH: Second kkH Third vvH Note number 24H – 60H (36 – 96) C2 – C7 Velocity 1H – 7FH (1 – 127). (Only in velocity mode.
JX-3P MIDI Expansion Kit PARAMETER ADDRESS TABLE Parameters CC number Description Value – Dec (Hex) 12 (0CH) Fine Tune 0 – 127 (00H – 7FH) 13 (0DH) Tune 0 – 127 (00H – 7FH) 14 (0EH) DCO Envelope Mod. 0 – 127 (00H – 7FH) 15 (0FH) DCO LFO Mod. 0 – 127 (00H – 7FH) 16 (10H) Source Mix 0 – 127 (00H – 7FH) 17 (11H) High Pass 0 – 127 (00H – 7FH) 18 (12H) Resonance 0 – 127 (00H – 7FH) 19 (13H) Cutoff Frequency 0 – 127 (00H – 7FH) 20 (14H) VCF Envelope Mod.
JX-3P MIDI Expansion Kit MIDI IMPLEMENTATION CHART Function Transmitted Received Comments Basic Channel 1, 2, 3 1, 2, 3, OMNI User defined Note Number 36 – 96 36 – 96 C2 – C7. Received note numbers outside the range will be transposed. O O O O A preset velocity of 64 is transmitted. Velocity Note ON Note OFF Velocity values are only received in the velocity mode.
