Boss ME-20

[dmeek]

I need a schematic of the power input section.

I notice that almost all Roland/Boss is missing from Elektrotanya. What Happened?

Doug

[Jazz P Bass]

The input may be the same as all of the ME pedals.

boss ME-30 AC input__ 9Vdc.pdf


Spec's on the power adapter:

Specifications:
I/P AC:100V~240VAC
50-60Hz
O/P DC:9V DC 1A
Chord: 46in
Tip: (-)center, (+)outer

The DSS310 is an EMI suppressor

DSA004419.pdf

[dmeek]

This one seems to be different from other ME-xx pedals. The switching regulator is BD9851.

I have a dead short at the adaptor jack. An exact schematic would make it easier to trace
though the SMD jungle.

The input protection diode is not shorted. Maybe not worth fixing.

[paleeman]

I will email it to you, dmeek.

[Jazz P Bass]

Can you not post the schematic?
That one in particular seems to be MIA.

[g1]

If boss/roland manuals have actually disappeared from elektrotanya, then they are probably on a "cease and desist" mission with their lawyers involved. They charge good money for their service manuals and can probably easily prove they suffer financial damage from copyright infringement.

[dmeek]

It turned out to be a short in the windings of the torroidal EMI filter FL1.


http://music-electronics-forum.com/a...1&d=1424651971

I can understand not sharing some manuals publicly. As much as I'd like to,
I have a some I can't share.

The Boss manuals are back at Elektrotanya, but there is only one Roland: the JC-55

[Jazz P Bass]

FL1 is a WQT04-60


Hell of a difference from the DSS310.http://music-electronics-forum.com/a...-dsa004419.pdf

[paleeman]

It turned out to be a short in the windings of the torroidal EMI filter FL1.


http://music-electronics-forum.com/a...1&d=1424651971

I can understand not sharing some manuals publicly. As much as I'd like to,
I have a some I can't share.

The Boss manuals are back at Elektrotanya, but there is only one Roland: the JC-55

Great!

[alvaroorigami]

I could also pass excuse the schematic please