These printers use the 108R713 cartridge:
Click On a Printer to View it's Cartridges
Xerox-Tektronix Phaser 7760
Xerox-Tektronix Phaser 7760 DN
Xerox-Tektronix Phaser 7760 DX
Xerox-Tektronix Phaser 7760 GX
Xerox-Tektronix Phaser 7760 Series