JCM2000 DSL 100 - JCM2-60-00 Repair or Replace. Discussion in 'The Workbench' started by Rumtin, May 30, 2015. (called out V2AA on the schematic)? It shows an extra transistor and a few other components as well for switching in that extra bypass cap. Man I have 2 JCM2000 dsl. Both are modified to fix the problems.
When looking at the schematics for a DSL, you must first be aware of the board numbering scheme used by Marshall. The DSL has 5 boards, each one having its own board ID, board Rev and Issue number. The boards are identified by a Board ID as follows: JCM2-xx-yy where «xx» is the board number and «yy» is the board revision number. This board ID as a whole identifies the board itself at the hardware level. A different board revision number can mean different components and traces so when looking at schematics, you must ensure that you have the proper schematics.
Each board also has an Issue number. The issue number applies to a Board ID and is used to track soft changes to the schematics that don’t need a change of board layout. The issue number is printed on the boards and the first visible number after the word «issue» is the issue number. The Marshall DSL was introduced in late 1997 and replaced the JCM900 series. This marked the return of the all valve signal shaping path in their flagship amplifier. The DSL also marked the re-introduction of the EL34 valve. Marshall had been working with SED (Svetlana back in 1997) from St.
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Petersburg Russia to develop a quality EL34 as supply of a good quality EL34 was non-existent at the time. The DSL was well received and highly anticipated and was one of the most flexible amplifiers of its time, and still is. In 2001, a Limited run of one hundred DSLs were produced in Orange Tolex and were nicknamed «Orange Crunch».
In 2005 (?), a limited run of DSL 100SS-Cs were produced in silver tolex and chrome faceplate. In 2009, the special edition 1923 DSL was released, celebrating Jim Marshall’s 85th birthday. In 2009, a limited run of «MLB» DSLs were released with levant style tolex and black piping, along with a cheaper 4x12 cab Click to see a gallery of DSL pictures.
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