Marantz model 1090

[Ytamshb]

I have Marantz model 1090 i bought it from junk shop. And then i try play some music but no sound i found that main volume controller was damaged and can’t make it work agin i try cleaning it but it’s not working properly

RM05030680

Variable Resistor,

50kS X2 B

This is volume know part number it’s come with 8pin volume knob I can’t find same part there are 6 pin volume controls 50k but I can’t find 8pin is there any way to replace that with 6 pin 50k controller i need help

 

[Lavane]

You should be able to find a new dual volume pot at Mouser or Digikey.
It should be audio taper? But could be linear taper. The service manual may say. If you can't find a PCB mount with the right value, you can always use a standard dual pot and just run short jumper wires from the pots to the PCB.
I've had to do this before with various equipment. Personally I would rather try to find something new than slog through Marantz parts on ebay for a used one.

 

[Ytamshb]

Which pins should i do jumper wires

 

[petehall347]

extra pins will be for loudness

 

[Ytamshb]

You mean this picture 4th pin for loudness.
Yesterday day i try with 3 pin dual pot soldering to the board only one side sound comes out

 

[petehall347]

only one side sound comes out

both sides should work if pot good

 

[Ytamshb]

both sides should work if pot good

I checked pre out only work left side no out put sound from right side. And I checked power amp direct input both side works but right side sound lower than left side

 

[petehall347]

2 different issues then try mono button