Markbass CMD121P

[Technocrat]

Can anyone help me with a schematic for a Markbass Amp CMD121P or can you tell me the value of R84. It is not practical to send the amp to a repairer as I am remote

 

[Sparky Mark]

Can anyone help me with a schematic for a Markbass Amp CMD121P or can you tell me the value of R84. It is not practical to send the amp to a repairer as I am remote

This schematic for a 2009 class AB LM3 shows R84 as 10k ohms.

 

[Technocrat]

Thank you

 

[jedg123456]

This schematic for a 2009 class AB LM3 shows R84 as 10k ohms.
View attachment 4946981

Hello
I have a question: do you happen to have a schematic for a MarkBass power amp using IRF640 transistors? There are damaged capacitors C112 and C117 and an invisible value and someone has inserted some replacements for C87 and C88. Best Regards

 

[Sparky Mark]

Hello
I have a question: do you happen to have a schematic for a MarkBass power amp using IRF640 transistors? There are damaged capacitors C112 and C117 and an invisible value and someone has inserted some replacements for C87 and C88. Best Regards

Sorry, I don't think so, that might be the later class D design.