You're looking for the schematic of the JLink V9!
The schematic is divided into two primary interface zones: the Host (USB) side Target (Debug) side USB Interface jlink v9 schematic
The D+ and D- USB trace lines must be routed as a strictly isolated differential pair. Bad PCB layouts fail to do this, resulting in frequent USB disconnects. If you'd like to look closer at this hardware, let me know: Are you trying to repair a bricked probe ? You're looking for the schematic of the JLink V9