Roland original adapter specs for MT-32? (Discussion)

[Alistair]

Hey all,

Long time, no chat. Tandy absorbs most of my time these days.

But I do have a MT-32 related question- what is the original specs of the ROland adapter that came with the MT-32, and if it's what I think, above 1 amp, is it better to replace it with a decent AC adapter that matches exactly the specs of the MT-32's power needs?

Regards,
- Alistair

[Great Hierophant]

The original Roland adapter is the ACB series.  This adapter comes in 100, 120, 220 and 240 VAC varieties.  The output is 9VDC, 1200mA.  It is almost a universal adapter, it can be used with many, many other Roland modules and products.  The MT-32 only requires 650mA, having a power supply with greater amperage than the device requires is never an issue because the device will use only what it needs.  Make sure the tip of your adapter is center negative.

[mace]

I have both a ACB-220 and a ACI-220-J

The ACB came with my MT-32 and is 9V 1200mA
The ACI came with my SC-155 and is 9V 1000mA

Basically anything 9V 800mA or more is going to be fine.

The original Roland adapter is the ACB series.  This adapter comes in 100, 120, 220 and 240 VAC varieties.  The output is 9VDC, 1200mA.  It is almost a universal adapter, it can be used with many, many other Roland modules and products.  The MT-32 only requires 650mA, having a power supply with greater amperage than the device requires is never an issue because the device will use only what it needs.  Make sure the tip of your adapter is center negative.

Exactly right, and I can't stress that enough, Tip is negative, ring/sleeve is positive!!
This goes against the general standard.

[Great Hierophant]

Exactly right, and I can't stress that enough, Tip is negative, ring/sleeve is positive!!
This goes against the general standard.

Center negative AC adapters are more common with Japanese electronics.  Nintendo and Sega used them in systems with external power bricks. 

[jharris01]

Reason why I am currently using the power adapter from my vintage SEGA Master System console with my MT-32. 

[mace]

Exactly right, and I can't stress that enough, Tip is negative, ring/sleeve is positive!!
This goes against the general standard.

Center negative AC adapters are more common with Japanese electronics.  Nintendo and Sega used them in systems with external power bricks. 

Really? I didn't know that.