Gearslutz.com - View Single Post - Yamaha PM-1000 (full mixer) Output Module Question

CZ101 · 7th March 2010

Hello Geekslutz,

This is a question for anyone familiar with the PM-1000's master/monitor output circuit..

Basically, I have some Rubycon electrolytic caps that I want to use to recap the master output section but, I'm having trouble discerning which group of caps on the circuit correspond with the master output and which group of caps funnel to the monitor output.. The two circuit sections (master & monitor) are 2 of the same amp stage, adjacent on the PCB. I can't figure out which is which...

I have the schematic but no circuit diagram for the output module (fwiw, there is an input channel circuit diagram floating around the web)..

So, I've attached the output module schematic with some labeling. The input section is labeled A, the master output section - B, and the monitor output section - C.

I also attached two photos of the output module PCB for reference - with labeling for the circuit's different sections from left to right - 1, 2 and 3.

I just need to know what numbers B & C correspond to. My hunch is that #2 is B, and #3 is C.. Is this correct?

Thank you in advance for your help.

7th March 2010	#1
CZ101 Lives for gear Joined: Mar 2004 Location: Cincinnati, OH Posts: 736 Thread Starter	Yamaha PM-1000 (full mixer) Output Module Question Hello Geekslutz, This is a question for anyone familiar with the PM-1000's master/monitor output circuit.. Basically, I have some Rubycon electrolytic caps that I want to use to recap the master output section but, I'm having trouble discerning which group of caps on the circuit correspond with the master output and which group of caps funnel to the monitor output.. The two circuit sections (master & monitor) are 2 of the same amp stage, adjacent on the PCB. I can't figure out which is which... I have the schematic but no circuit diagram for the output module (fwiw, there is an input channel circuit diagram floating around the web).. So, I've attached the output module schematic with some labeling. The input section is labeled A, the master output section - B, and the monitor output section - C. I also attached two photos of the output module PCB for reference - with labeling for the circuit's different sections from left to right - 1, 2 and 3. I just need to know what numbers B & C correspond to. My hunch is that #2 is B, and #3 is C.. Is this correct? Thank you in advance for your help. Attached Thumbnails