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Unread 02-13-2011, 04:40 AM   #1 (permalink)
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Need a JCM 800 2203 schematic?

I've been given a mod schematic for a jcm 800, but as i'm new i wanna see what they've changed, does anyone know where i can find a 1980's jcm 800 2203 schematic, vertical input? Needs to be correct!
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Unread 02-13-2011, 05:01 AM   #2 (permalink)
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Re: Need a JCM 800 2203 schematic?

Quote:
Originally Posted by ItsChrispyTv View Post
I've been given a mod schematic for a jcm 800, but as i'm new i wanna see what they've changed, does anyone know where i can find a 1980's jcm 800 2203 schematic, vertical input? Needs to be correct!
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Unread 02-13-2011, 05:24 AM   #3 (permalink)
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Re: Need a JCM 800 2203 schematic?

Quote:
Originally Posted by ItsChrispyTv View Post
I've been given a mod schematic for a jcm 800, but as i'm new i wanna see what they've changed, does anyone know where i can find a 1980's jcm 800 2203 schematic, vertical input? Needs to be correct!
Since when was anything Marshall did 100% schematic correct?

http://www.drtube.com/schematics/marshall/jcm800pr.gif

http://www.drtube.com/schematics/marshall/jcm800pw.gif
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Unread 02-13-2011, 06:36 AM   #4 (permalink)
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Re: Need a JCM 800 2203 schematic?

is there a clearer one available like a ceriatone one or something, i'm not good at reading those ones. I need to see the values and colour n such.
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I wanna be on a stage, holding my axe, doing what i love, Is that to much to ask?

Yes i like slash, whats the problem, oh you like steve vai? Original huh?

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Unread 02-13-2011, 08:12 AM   #5 (permalink)
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Re: Need a JCM 800 2203 schematic?

Chrispy, If You have a hard time reading a Marshall PCB schematic in Black and White How are you going to be able to Compare and Translate a Colorized Turretboard layout from Ceriatone?

I'm assuming your vertical input has a PCB with Chassis mounted pots and input jacks with flying leads?

This is the best one going it's for the Preamp sections of the 2203 and 2204 JCM800:

http://www.drtube.com/schematics/marshall/2203prem.gif

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Unread 02-13-2011, 12:09 PM   #6 (permalink)
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Re: Need a JCM 800 2203 schematic?

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Originally Posted by Wilder Amplification View Post
Since when was anything Marshall did 100% schematic correct?
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Unread 02-13-2011, 12:16 PM   #7 (permalink)
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Re: Need a JCM 800 2203 schematic?

Quote:
Originally Posted by ItsChrispyTv View Post
is there a clearer one available like a ceriatone one or something, i'm not good at reading those ones. I need to see the values and colour n such.
And you're never going to GET good at reading them if you keep relying on layouts.

If you really wanna learn amplifiers, how they work and how to mod them, a layout will teach you nothing.

Start learning some basic electronics and how to read schematics. There are tutorials all over the internet.
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Unread 02-13-2011, 12:26 PM   #8 (permalink)
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Re: Need a JCM 800 2203 schematic?

I hope no one gets electrocuted!
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Unread 02-13-2011, 03:31 PM   #9 (permalink)
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Re: Need a JCM 800 2203 schematic?

Could you post the mod or is it copyrighted?
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Unread 02-13-2011, 03:48 PM   #10 (permalink)
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Re: Need a JCM 800 2203 schematic?

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Could you post the mod or is it copyrighted?
not aloud to post it, Frank has asked me not to, but its on the metro forum, Check this page out, i can't tell you which page it is on, but the clue is, its over 100, under 150, is even, and a factor of 7. Thats as much as i'll give,
Heres the subject.
MetroAmp.com Forum • View topic - S.I.R. 100W SuperLead Schematic pt. II
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I wanna be on a stage, holding my axe, doing what i love, Is that to much to ask?

Yes i like slash, whats the problem, oh you like steve vai? Original huh?

Well, I bullsh*t ALOT!
Sometimes i even believe the bullshit i'm telling because im so great at it!

www.youtube.com/ChristianBurrell
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Unread 02-13-2011, 07:33 PM   #11 (permalink)
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Re: Need a JCM 800 2203 schematic?

Quote:
Originally Posted by ItsChrispyTv View Post
not aloud to post it, Frank has asked me not to, but its on the metro forum, Check this page out, i can't tell you which page it is on, but the clue is, its over 100, under 150, is even, and a factor of 7. Thats as much as i'll give,
Heres the subject.
MetroAmp.com Forum • View topic - S.I.R. 100W SuperLead Schematic pt. II
If they're trying to say that this layout is #36 or #39 it is far from correct.
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