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WelcomeToTheMachine
Copper Member

24 Posts

Posted - 01/25/2009 :  05:01:18  Show Profile  Visit WelcomeToTheMachine's Homepage  Reply with Quote
For DC, IN, OUT, and momentary switch. I don't know how to do it.

Dr. Bob
Moderator

Australia
6593 Posts

Posted - 01/25/2009 :  05:24:03  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
quote:
Originally posted by WelcomeToTheMachine

For DC, IN, OUT, and momentary switch. I don't know how to do it.


Hi WelcomeToTheMachine

Can you please be a bit more specific.

I can't make out what you are really asking for,
& is it for any particular pedal/s?

Regards Dr. Bob
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WelcomeToTheMachine
Copper Member

24 Posts

Posted - 01/25/2009 :  05:28:30  Show Profile  Visit WelcomeToTheMachine's Homepage  Reply with Quote
Well... I have this mutilated HM-2 that I'm planning on re-housing with new jacks, LED, switch etc. But I have absolutely no reference:


I'm trying to figure out where solder pads 1-6 and 18 go (which ones go to ground, and the rest).
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 01/25/2009 :  06:06:43  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
A redrawn HM-2 Schematic can be found Here:
http://www.freeinfosociety.com/electronics/schempage.php?cat=1

And thanks to:
Lightburst and Saanyee
There are internal pictures of the HM-2, that can be found in the "Pedal Internals thread"

Page 2 HM-2 MIT
http://www.bossarea.com/forum/topic.asp?TOPIC_ID=4147&whichpage=2
Page 5 HM-2 MIT
http://www.bossarea.com/forum/topic.asp?TOPIC_ID=4147&whichpage=5

Hope that helps?

Regards Dr. Bob
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cctsim
Silver Member

United Kingdom
418 Posts

Posted - 01/25/2009 :  06:31:01  Show Profile  Reply with Quote
There is a schematic from the service notes that might be more helpful here:

http://nicosonic.free.fr/schems/BossHM2.pdf

Good luck with the re-housing.
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WelcomeToTheMachine
Copper Member

24 Posts

Posted - 01/25/2009 :  06:38:27  Show Profile  Visit WelcomeToTheMachine's Homepage  Reply with Quote
Thanks, but none of this helps...

I already have the schematic, but get this: I can't read schematics.

All I need to know is where the wires from the solder pads 1-6 and 18 go. A picture or just a description would be fine.

PS - I've already looked at the pictures on the Boss Guts pages, but neither of them showed where the actual wires went.



Still looking...
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cctsim
Silver Member

United Kingdom
418 Posts

Posted - 01/25/2009 :  06:57:03  Show Profile  Reply with Quote
The schematic on the link I had in my previous post includes some useful numbers.

For example, the following numbers on the pcb are connected as:

1 -> connected to the the ring tip of the input socket.
2 -> connected to the dc jack (adapter connection).
3 -> connected to sleeve of the input socket.
4 -> connected to the dc jack (battery connection).
5 -> connected to the ring of the output socket
6 -> connected to the tip of the output socket
18-> connected to the on-off switch
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WelcomeToTheMachine
Copper Member

24 Posts

Posted - 01/25/2009 :  07:36:41  Show Profile  Visit WelcomeToTheMachine's Homepage  Reply with Quote
1 -> connected to the the ring tip of the input socket.
2 -> connected to the dc jack (adapter connection).
3 -> connected to sleeve of the input socket.
4 -> connected to the dc jack (battery connection).
5 -> connected to the ring of the output socket
6 -> connected to the tip of the output socket
18-> connected to the on-off switch

Hmmm.. Aren't there two lugs on the switch?

And... Could you possibly be a little clearer on the wiring of the DC jack? I'm not planning on using the battery snap, so I won't want to wire that in and clutter precious box space.

I feel like a real pain in the ass right now , but could you possibly do a diagram in MSpaint or something?

Really - thanks so much everyone for all your help so far! Only a little bit more to go.

PS - on the daughter board for the pots and LED, one of the LED's solder pads was denoted by a >| symbol. Does that indicate positive?
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WelcomeToTheMachine
Copper Member

24 Posts

Posted - 01/25/2009 :  07:42:33  Show Profile  Visit WelcomeToTheMachine's Homepage  Reply with Quote
Wait got it, the other lug goes to ground... But wait! Does it matter which lug I use for ground?
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cctsim
Silver Member

United Kingdom
418 Posts

Posted - 01/25/2009 :  07:55:57  Show Profile  Reply with Quote
There should be 3 lugs on the dc socket. The middle one is ground. The other two are for the dc adapter and battery.

The battery lug gets disconnected when you plug-in the dc jack of the adapter. This is one way to distinguish the dc adapter and battery lugs.
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bossFan
Bronze Member

Portugal
97 Posts

Posted - 01/25/2009 :  21:21:03  Show Profile  Reply with Quote
quote:
Originally posted by cctsim

There is a schematic from the service notes that might be more helpful here:

http://nicosonic.free.fr/schems/BossHM2.pdf

Good luck with the re-housing.



A Biiiiiiiiigggggggg thank you, CCTSIM, for the link.

I was searching for the HM-2 Original Schematic for Years.....
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