Parasound JC-1 Help Please — did I reverse two connectors?

[Bob Stern]

I just replaced the NTC thermistor on the "AC input & protection circuit" board. I thought I photographed all the cables before removing the board, but I discovered I failed to photograph the cables on the edge of the board facing the front panel.

The lowermost two 2-pin connectors on the front edge are labeled, starting at the bottom, "TMP LED" and "TMP SW".

There are two cables that fit these connectors, and I hope someone can help me avoid swapping them. One cable has two blue wires and passes through a hole in the metal bottom plate close to the connector. The other cable has one red and one white wire and extends to a hole at the right end of the front panel.

I've attached a photo of what I guess is the correct arrangement: the blue/blue cable is connected to the lowermost connector TMP LED. Is this correct, or do I have the two cables reversed?

Thanks for your help!

 

[JonSnell Electronic]

Use your DVM on diode check to find out which one has the switch and which one has the LED.

 

[tomchr]

Last I worked on a Parasound amp (an A23), I emailed Parasound and had a schematic within hours.

You should be able to trace the wires and figure which goes where.

Tom

 

[Bob Stern]

Use your DVM on diode check to find out which one has the switch and which one has the LED.

Thanks, Jon — that resolved it!

You can tell how rusty I am that I didn't think of that. I haven't done hardly any tinkering since the 1960's when I used to build ham radio gear. No diode check function on the VTVM's back then!

Thanks again for your patience with a reborn neophyte.