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Roland MKS-70 with full upgrades

Yes, you read correctly. A lovely customer in Miami, who I've got to know rather well over the past couple of years, sent me his beautiful synth module asking me to put everything into it. I can't think of anything that he didn't ask for and so ended up doing a Roland MKS-70 full upgrade. Of course I couldn't help myself and Brent's MKS-70 got referred to as 'The Miami Sound Machine'. 😀

DHL Express LogoBrent couldn't find a good deal on shipping so I arranged for his instrument to be collected on my DHL Express (import) account. Yes, it's a little extra work for me but I know that the package will be looked after, I don't pay import duty and Brent would only pay any duty on the cost of the upgrades, when it's returned to him. 🙂 Above all, it was considerably cheaper than anything he could find locally.

Yeah, I know so if you're in the US or Canada, then you're busting to know, right? Well, the cost of shipping The Miami Sound Machine from Florida to Hemel Hempstead, UK was less than 180 GBP and the package was here in three days. Brent couldn't guarantee he'd be in when DHL was scheduled to collect so he took it to a DHL depot. Be warned however. If you do that, DHL will most likely open the package for security reasons (fair enough).

Brent had already bought some bits 'n' pieces and packaged with his MKS-70 were Fred Vecoven's Super-JX Flash module, Fred's latest digital PWM kit and four Xvive MN3009 replacement chorus chips.

Vecoven Flash Module Installed In Roland MKS-70
Fred Vecoven's Super-JX Flash Module is part of my Roland MKS-70 full upgrade package.

Knowing that this Roland MKS-70 full upgrade was coming in, I bought a GU-280 VFD replacement display kit off Guy Wilkinson and had ordered parts to build a Nebula balanced outputs jack-board and a P0004 modular switched-mode power supply. Is there a Super-JX (MKS-70 or JX-10) on the planet that's not powered by a P0004?!?!?

Nebula is part of my Roland MKS-70 Full Upgrade
Delivering superior phase coherency, Nebula uses dedicated balanced line driver ICs to produce balanced outputs of each channel, as opposed to a dual op-amp configuration. Now available with screened internal audio cables.

Brent figured that while the machine was here, it would be prudent to also change the front panel switches... so I ordered them, too.

Okay, so Brent told me that his MKS-70 was displaying random behaviour like freezing, intermittent booting, bad sound and so on. I immediately suspected the power supply so when I got, I was NOT going to switch it on!

Instead, I ripped out the power supply as a P0004 modular switched-mode power supply was already on the upgrade list.

I could immediately tell the power supply was quite fatigued. The smoothing capacitors were starting to swell and there was some mild scorching around the rectifier joints.

Then, on removing the power supply, I was shocked to find that the 2SD1406 responsible for regulating -15V was so dry-jointed, that none of its pins were making contact with the tracks on the underside of the PCB.

Dry joints underneath MKS-70 Power Supply PCB
Here's the underside of the power supply PCB showing Q4 (a 2SD1406, highlighted in red ) which is part of the -15V regulator circuit. As you can see, it's had enough! Dry-joints are a common source of problems on these old PCBs, especially under components that get hot.

This Roland MKS-70 full upgrade isn't cheap but if you're a Super-JX owner, please  at least consider replacing your synth's power supply with a P0004.

Having the right equipment and using a couple of very well seasoned techniques (which might not be in the book, incidentally), I'm able to remove components without damaging the PCB or the components themselves.

MKS-70 Module-Board prepd for Digital PWM upgrade
This is one of Brent's MKS-70 module-boards which is being prep'd for Fred Vecoven's digital PWM upgrade.

As original components for this generation of electronics are becoming scarce and increasingly more difficult to procure, with the customer's approval, salvaging them off jobs like this is a godsend and will inevitably help another Roland MKS-70 owner some time down the line. It's a true privilege being part of this kind of community! 😀

Here's the underside of the PCB after another very clean removal of four 82C54Ps.

Of course, after doing all of that, you gotta test it all but a Roland MKS-70 full upgrade is so worth it and gives this legendary synth module a whole new lease of life.

Vecoven Digital PWM is part of this Roland MKS-70 Full Upgrade
And here is one of the Vecoven digital PWM boards installed on to a module-board.

A few weeks ago, I decided to take an idea I've had for a long time, to the next level; I made a pair of screened cables for the Roland MKS-70 to replace the original 'wires' that connect the outputs from the module-boards to the jack-board.

Screened audio cables are part of this Roland MKS-70 full upgrade
Accepting the insane cost of the tool that crimps the wires to the terminals that are inside the Molex connector was the hard part! Also visible, is the insulating boot over the IEC C14 power connector and of course, the chassis is securely connected to mains earth.

Before I started work on The Miami Sound Machine and while everything was still factory, I used Brent's instrument to test my new screened audio cables for the Roland MKS-70. A plug 'n' play installation, this is a simple but very worthwhile upgrade. You can read the whole story here. 🙂

Part of the work I do, includes keeping the customer updated on progress. I'm not sure what's happened in the past year or so but things have just got rather busy. Maintaining regular communications with customers however, remains paramount.

Okay, so you want to know just exactly what the customer got on this occasion. What does this Roland MKS-70 full upgrade include? Well, here ya' go:

  • Guy Wilkinson's P0004 power supply for Super-JX.
  • Earth bonding kit with IEC C14 power inlet connector.
  • Guy Wilkinson's VFD Super-JX display module.
  • Nebula balanced outputs / upgraded MIDI jack-board.
  • Replacement of wires connecting module-boards to Nebula with screened audio cables.
  • Fred Vecoven's Super-JX Flash module.
  • Fred Vecoven’s digital PWM upgrade.
  • Live-forever battery mod.
  • Replacement of all front-panel switches.
  • Chorus chip replacement with 4 x Xvive MN3009.
  • Rerouting of internal cables to reduce noise.
  • RE-MKS-70 rack-ears.
  • MCK-70 memory checker ROM.
  • Check all functions and calibrate module-boards.
  • 15% discount over purchasing items individually.

Sub-assemblies like the P0004 power supply and Nebula are tested prior to installation. The MKS-70 is then tested after every single upgrade. If something isn't right, I'll know straight-away.

Some of the Roland MKS-70 Full Upgrade Options
I've highlighted some of the options included in this Roland MKS-70 full upgrade. Note the severe lack of the original Roland cable looms!

A lot of the upgrades are not apparent from the outside of the MKS-70 but Guy Wilkinson's GU280 based VFD looks absolutely fabulous!

Guy Wilkinson's VFD is part of this Roland MKS-70 Full Upgrade
Visually one of the most impressive upgrades for the MKS-70, is Guy Wilkinson's VFD kit.

You may have noticed a couple of perhaps unexpected items in the inclusion list above. Well, Brent's MKS-70 didn't have rack-ears so he asked me to include my RE-MKS-70 rack-ear kit. He also asked for a copy of Guy's MCK-70 memory checker and so The Miami Sound Machine was accompanied by a few extra bits on its return to, well... Miami.

A few extra bits for Brent
Included with the return shipping to the sunshine state, was my RE-MKS-70 rack-ears kit and a copy of Guy Wilkinson's MCK-70 memory checker.

A big T H A N K  Y O U to Guy Wilkinson and Fred Vecoven for developing some awesome kit for the Roland Super-JX. 😀