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Tuesday, April 13, 2021

The Imp of the Perverse

Things I think I should be doing, for better or worse.

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Roland Jupiter-4 (JP-4) – Battery Replacement (CR2032)

2020-02-222020-02-22 Laban
In this video I will be replacing the original NiCad battery in a Roland Jupiter-4 (JP-4). This kind of battery is prone to leaking which can cause problems. In the JP-4 this is not an very big issue (at least compared to e.g. Korg Polysix where the leaking battery will cause havoc and damage traces…
Roland Jupiter-4JP-4, Jupiter-4, RolandLeave a comment

Building the Nava #6 – Soldering the Middle Tom

2019-08-202019-08-20 Laban
Soldering the Middle Tom of the E-licktronic Nava Roland TR-909 clone. I discovered that I by mistake had used the wrong type of capacitors in the power supply (but the correct value). Some of these capacitors were needed in the Middle Tom section so I had to desolder and rework the power supply.
NavaE-Licktronic, Nava, Roland, SolderingLeave a comment

Building the Nava #3 – Soldering the Bass Drum & Implementing fix

2019-07-222019-07-22 Laban
I have an older revision of the E-Licktronic Nava, v1.0L, which apparently has an issue with the bass drum. One of the traces on the board has to be cut and bypassed by a flying wire. This problem has been corrected in newer revisions of the board (I am not sure which revision though). See…
NavaNava, Roland, Soldering, tr-909Leave a comment

Roland TR-808 – Noisy Snare, Clap and Toms

2019-06-212019-06-21 Laban
This Roland TR-808 had very noisy snare, clap and toms. The toms especially sounded very coarse. It was a bit like when you try to stop your car on a road with gravel. The claps and the snares also sounded a bit tame or muffled. The common denominator between these instruments is the white noise…
Roland TR-808Roland, Soldering, TR-808Leave a comment

Building the Yocto #22 – Soldering the IO Board

2018-06-28 Laban
I finished the IO board and connected it to the main board and it powered up! Unfortunately the sequencer buttons did not work properly so I could not initalize the EEPROM memory, more about that in a later post. Video and images after the click!
YoctoRoland, Soldering, TR808, YoctoLeave a comment

Building the Yocto #21 – Soldering the Sequencer

2018-06-112018-06-11 Laban
The sequencer is now fully assembled apart from the MCU and SPI EEPROM not being mounted, according to the instructions. Video and photos in the post!
YoctoRoland, Soldering, TR808, YoctoLeave a comment

Building the Yocto #20 – Soldering the Master section

2018-06-102018-06-11 Laban
This section was quite small and was quickly assembled without any issues. I am however starting to think that there will be some horrible issues when I finalize the unit. But that is a problem for another day. Video in the post!
YoctoRoland, Soldering, TR808, YoctoLeave a comment

Building the Yocto #18 – Soldering the Cymbal

2018-06-062018-06-06 Laban
The Cymbal is soldered now. I had some issues with calibration and had to replace som resistors to get the calibration right. Video in the post.
YoctoRoland, Soldering, TR808, YoctoLeave a comment

Building the Yocto #17 – Soldering the Cow Bell

2018-05-062018-06-11 Laban
Things are coming along nicely, apart from the fact that my arm is now covered with ink from a pen which I forgot to recap while soldering the Cow Bell. Check out the video in the post!
YoctoRoland, Soldering, TR808, YoctoLeave a comment

Building the Yocto #16 – Soldering the Hand Clap

2018-05-012018-05-01 Laban
So I moved in July if 2017 and after that I haven’t really done anything with the Yocto unfortunately. I have done some work on restoring a Korg Polysix with various issues, but that will be a separate post. But now I have actually managed to get my thumb out of my ass to finish…
YoctoRoland, Soldering, TR808, Yocto2 Comments

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