Marshall Jcm 2000 Dsl 50 Schematic Symbol
JCM 2000 DSL50& DSL100 Heads. The Marshall 1959 Super Lead Plexi head and the JCM 800 Master. The 100 Watt DSL 100 and 50 Watt DSL 50.
The schematics are for boards, not the entire system. SO when the signal leaves for example the main tube board to go to the front panel controls, it leaves via CON1 which is conected to CON14 (or whatever) on the front panel board. Usually there is also a reference to the board number Unless someone removed all the various jumper cables inside, I rarely need to sort all that out. Once in a while I do when trying to find a break in the signal path. I am looking at the DSL100 drawing for the main tube board, JCM2-60-00 and just to the right of V1 are CON13,CON3,CON14.
Note just below those is a legend stating: CON14->COIN6 CON13->COIN2 (etc) All above on JCM2-61-00 That shows the matching connector on the 61-00 board, which is the preamp control panel board. Yes, it is clumsy. The schematics are for boards, not the entire system. SO when the signal leaves for example the main tube board to go to the front panel controls, it leaves via CON1 which is conected to CON14 (or whatever) on the front panel board.
Usually there is also a reference to the board number Unless someone removed all the various jumper cables inside, I rarely need to sort all that out. Creative X Fi Drivers Ubuntu Epson there. Once in a while I do when trying to find a break in the signal path. I am looking at the DSL100 drawing for the main tube board, JCM2-60-00 and just to the right of V1 are CON13,CON3,CON14. Download Video Ikan Besar here.
Note just below those is a legend stating: CON14->COIN6 CON13->COIN2 (etc) All above on JCM2-61-00 That shows the matching connector on the 61-00 board, which is the preamp control panel board. Yes, it is clumsy.Enzo, Yeah I know why they do it that way, but they don't do it well, it must have been a nightmare for the PCB layout guy. I don't need a schematic for repair, there are some aspects of the tone I like so I was trying to see what was going on in the design.
Probably wasn't a nightmare for anyone. No one sat down with a pad and pencil and drew these things during design. These are drawn after the fact to document the design.
A lot of this will be cut and paste from similar previous models anyway. I would prefer one large drawing of the whole amp, sure, but once you understand what they are doing, I find them darn consistent. COnsider the Peavey 5150 and their 5150-2 (the current 6505 and 6505+) The 5150 drawing set is like this Marshall (sorta) while the 5150-2 is one large schematic. Probably wasn't a nightmare for anyone.
No one sat down with a pad and pencil and drew these things during design. These are drawn after the fact to document the design. A lot of this will be cut and paste from similar previous models anyway. I would prefer one large drawing of the whole amp, sure, but once you understand what they are doing, I find them darn consistent. COnsider the Peavey 5150 and their 5150-2 (the current 6505 and 6505+) The 5150 drawing set is like this Marshall (sorta) while the 5150-2 is one large schematic.It's not the multipage schematics, I've done layouts from 130+ page schematics with several 1300 pin BGAs, but at least they were drawn well. This thing is just a mess. Well, I'm about half way through drawing up something clean in Orcad.
Please don;t pull a Joe Piazza on us and leave out the part numbers. I appreciate the effort Joe put in redrawing all those scjhematics, but it is maddening not to have the part numbers. SO much easier to refer to R132 and C125 than 'the resistor between the plate of the third triode and the upper end of the treble control.' I always use reference designators when drawing a scumatic, I'm also using the same ref-des the Marshall schematic is using so it's easy to cross-reference to that schematic, which will make it a lot easier for others to check what I may miss. I'm using regular switch symbols to show the switching rather than LDRs and what-not, as this will strictly be for a theoretical understanding of the amp.