Boss - HM-3 Hyper Metal  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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slammer88
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Post by slammer88 »

Hey GodSaveMetal, will you publish the project files of HM-3 and MT-2 ?

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GodSaveMetal
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Post by GodSaveMetal »

slammer88 wrote:Hey GodSaveMetal, will you publish the project files of HM-3 and MT-2 ?
I have yet publishing the BOSS HM-3 with the PCB original one´s; the MT-2 is this:
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boss MT-2.pdf
BOSS MT-2 service notes
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RhythmAce
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Post by RhythmAce »

Hi,

I got a HM-3 I would like to mod.

Do you have tips for me?

Did you try DimebuGG's Mod?
- Lift one leg of or remove D2, D3, and D4.
- Lift one leg of or remove C31.

Thank you,

Mich

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slammer88
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Post by slammer88 »

Sorry for poking the dead horse, but got a question for HM-3 schematic. There seems no place to connect the bypass switch. Where shall be the sw+ ?

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m4268588
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Post by m4268588 »

BossHM3.pdf
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slammer88
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Post by slammer88 »

Hi guys,

Today I've redrawn the original layout from the file m4268588 share above. Also found a gut pic on google, and that helped as well. I'll soon give this a try.
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BossHM3_redrawn_by_slammer88.ai
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