Midas XL3 Iref

[boogui]

Hello,
I'm currently working on a project to use old XL3 preamp/EQ (XL301 board) and fit them in a rack. I have a question regarding the I ref signal. Is it an input or output, what is the purpose of it ?
As i will use a custom power supply, do i need to connect it somewhere ?

Thanks for any explanations.

have a good day

Seb

 

[sortedaudio]

Iref supplies Q3, Q4 & Q5 which are constant current sources for the LEDs on the channel. Connect a 1k 2W resistor between Iref on pin 2 and V- on pin 5, and all will be good.

 

[boogui]

Thanks a lot for the answer. Have a good day