Ibanez - SM-9 / Maxon SM-01 Super Metal

umutgokcen · Post by **umutgokcen** » 20 Mar 2010, 23:21

I looked everywhere but I can't find a schematic for this one. Does anybody have it?

Any suggestions for mods? It would be nice to get a bit more volume out of this thing. The drive feels a bit fizzy as well. Not very responsive

Thanks to all!

Dirk_Hendrik · Post by **Dirk_Hendrik** » 21 Mar 2010, 15:53

Use the schematic for the Metal Charger. The're the same. Browse the HC reviews for a simple and quick mod that will suit your needs by removing 4 diodes.

umutgokcen · Post by **umutgokcen** » 21 Mar 2010, 17:26

Thanks Dirk, I found everything. It seems like diodes are the ones to go after. So I think I'll socket them and experiment for a while. I'll post back what I find.

guile · Post by **guile** » 18 Oct 2011, 12:01

Old topic, but which diodes are we talking about?

Dirk_Hendrik · Post by **Dirk_Hendrik** » 18 Oct 2011, 13:04

The cloppers. The SM's have 3 clipping stages. Removing 2 of these sets is an old trick to get a wider variety of sounds from the pedal while the max clipping barely suffers from this removal. Other than that the output level finally gets decent for stage use instead of "bedroom metal only".

TubeOrgasmer · Post by **TubeOrgasmer** » 19 Oct 2011, 23:21

Specifically, D3,D4 and D5,D6, in those pairs. I replaced them with red 3mm LEDs and it sounds a lot better, and has a nice powerful EQ.

nitraus · Post by **nitraus** » 03 Jan 2012, 22:51

Just a question: should I solder a jumper in place of the removed diodes or not?

CHEEZOR · Post by **CHEEZOR** » 04 Jan 2012, 18:05

No jumper. Just remove. Here is a link to the page HC page: http://www.harmonycentral.com/products/113250
If you use Ctrl + F in your browser to search for the term "diode" then you will find relevant posts. Although people are all recommending different mods. Give it a read. Decide for yourself.

nitraus · Post by **nitraus** » 04 Jan 2012, 21:35

Thanks, so it seems I have a problem.. I'll try to find out more about it, in case I'll ask for some help in the proper section.

nitraus · Post by **nitraus** » 04 Jan 2012, 22:30

I modded this box removing the D3, D4, D5 and D6 diodes as suggested by various people. Now the power led doesn't light, and all I get is a buzz doing thump-thump-thump-thump coming from the amp.
Did anyone experience a similar problem?

Thanks in advance!

nitraus · Post by **nitraus** » 04 Jan 2012, 22:32

So, I definately have a problem, here it is: viewtopic.php?f=10&t=15655

nitraus · Post by **nitraus** » 04 Jan 2012, 23:24

By the way, I took a look to the MS10 PCB and it's different from the one on SM9; at least, it looks different.

nitraus · Post by **nitraus** » 05 Jan 2012, 01:39

I solved it, it seems it was a problem with the momentary switch.

nitraus · Post by **nitraus** » 05 Jan 2012, 01:40

I found the solution to the problem. In the next days I'll figure out if and how to replace the diodes.

CHEEZOR · Post by **CHEEZOR** » 05 Jan 2012, 22:29

Glad to hear! Thanks for posting your solution!

mozwell · Post by **mozwell** » 08 Jan 2012, 23:07

found in my travels, hope it helps

Dirk_Hendrik · Post by **Dirk_Hendrik** » 09 Jan 2012, 07:02

Poorer readability but this one:
http://www.freeinfosociety.com/electron ... ezms10.gif

dies not contain the errors that are in the cederholm schem.

nitraus · Post by **nitraus** » 09 Jan 2012, 09:49

Dirk_Hendrik wrote:http://www.freeinfosociety.com/electron ... ezms10.gif

the link seems broken. could you please attach the image?

Dirk_Hendrik · Post by **Dirk_Hendrik** » 09 Jan 2012, 13:59

URL works fine here...

ddpawel · Post by **ddpawel** » 09 Jan 2012, 14:15

nitraus wrote:
Dirk_Hendrik wrote:http://www.freeinfosociety.com/electron ... ezms10.gif
the link seems broken. could you please attach the image?

Try again. Page is protected against hotlinking.

Ibanez - SM-9 / Maxon SM-01 Super Metal [schematic]