Vintage Roland JC 120 Jazz Chorus Repair Input Jacks???

[ZoundsOK]

Hi there,

I'm working on an early production (mid to late 70's) Roland JC 120 Jazz Chorus (chrome corners, white label speakers, no bright switch, no FX Loop, no SN#).

All 4 input jacks (Low and High on Ch 1 and 2) are busted to pieces, to the point where I can't tell what type of jacks they are (how many pins they are supposed to have), and how they are supposed to operate within the functionality of the amp.

I can't find the correct schematic, and I can't find a relevant part number for those input jacks, so I'm stuck.

Best I can figure is that they might be "switched" jacks, they could have had up to 8 pins (based on what I can see - but maybe these were replaced with what someone else had on hand at some point...), both "High" inputs seem to be using a total of 4 pins, and the "Low" inputs seem to be using 6 pins.

This amp is a bit out of my repair experience, as I usually just work on old tube amps with no channel switching, but I want to figure this one out. I just need a little help.

Does anyone know what type of input jacks this amp uses? Please let me know if you have any helpful info for me.

Thank you.

[Jazz P Bass]

Can you post a pic of the jacks?

[DrGonz78]

One thing is the jacks must have insulating washers. Otherwise they will oscillate. 

[J M Fahey]

Do jack pins go straight into PCB or they are wired to it?

Also asking for a picture.
Both of the jack remains and PCB itself.

Top and bottom closeups may let us "lift" the actual schematic (at least for the input section) by seeing what goes where.