LVS-7500 External System Installation and Quick Start Guide 18. Optional: Close the printer door if desired. Note that doors to some printer models may need to remain opened or be removed. 19. Assembly of the LVS-7500 External System is complete. Below is a sample image of the LVS- 7500 External System working in conjunction with a thermal printer. LVS-7500 External System Installation and Quick Start Guide Page 37 of 45