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What are you Listening To Right Now? - and more

so this eq:

View attachment 3836943

had supposedly just returned from the tech after a good cleaning....mmmm hmmm...

there was popping in the audio when cycling the toggles but it would go away...then come back. symptoms of leaky caps allowing dc on the switches.

jvc does not like removeable bottoms.

View attachment 3836944

the main filter caps are within tolerance so they stay for now. i have caps that could have been fit and a jumper made but no need atm. i got a nice pair of vishay 3 legged caps in my mouser cart that should drop in.

View attachment 3836945

they use a glue that gets super crusty and when removed, it leaves the board stained but any jvc gear that i've had on the bench has not had corroded leads from the glue.

View attachment 3836946

that lone cap on the fuse board, next to the resistor is a .47uf polarized electrolytic...the schematic calls for .12uf film. the pcb has a non polarized symbol for a film cap.

i got a feeling that they installed that polar cap for a reason so that's what i replaced it with.

View attachment 3836947

power supply is done. line amp is done.


View attachment 3836948

relay board is done

problem is gone.

i'm in no hurry to recap the filter board. it's going to be a pita so until the day comes that i need to disassemble dirty sliders or something fails, it's staying original.

View attachment 3836950

yawn:boring::bye:
Back in the Stack it goes. :thumbsup: :smoke:
 
so this eq:

View attachment 3836943

had supposedly just returned from the tech after a good cleaning....mmmm hmmm...

there was popping in the audio when cycling the toggles but it would go away...then come back. symptoms of leaky caps allowing dc on the switches.

jvc does not like removeable bottoms.

View attachment 3836944

the main filter caps are within tolerance so they stay for now. i have caps that could have been fit and a jumper made but no need atm. i got a nice pair of vishay 3 legged caps in my mouser cart that should drop in.

View attachment 3836945

they use a glue that gets super crusty and when removed, it leaves the board stained but any jvc gear that i've had on the bench has not had corroded leads from the glue.

View attachment 3836946

that lone cap on the fuse board, next to the resistor is a .47uf polarized electrolytic...the schematic calls for .12uf film. the pcb has a non polarized symbol for a film cap.

i got a feeling that they installed that polar cap for a reason so that's what i replaced it with.

View attachment 3836947

power supply is done. line amp is done.


View attachment 3836948

relay board is done

problem is gone.

i'm in no hurry to recap the filter board. it's going to be a pita so until the day comes that i need to disassemble dirty sliders or something fails, it's staying original.

View attachment 3836950

yawn:boring::bye:
Just a build observation , seems weird that they used ribbon cables & connectors and also wire wrap posts in combination on the same board.
 
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