How to open epson lx 310 printer?

I've serviced a few of these old workhorses. They're built like tanks but not super user-serviceable. Before you open it ask yourself why. If it's for cleaning you can often clean the print head path with compressed air and a lint-free cloth through the openings. If it's for a repair like replacing a ribbon or fixing gears you might need to open it.

The process: Unplug it. Take off the paper tractor. Flip it over and remove the four large screws on the bottom (sometimes under rubber feet). There might also be screws inside the paper feed area. Then carefully separate the top cover from the bottom. It's tight and has plastic clips along the sides—go slow with a plastic spudger. Once open you'll see the main mechanism. Be super careful with the plastic gears and the delicate print head cable. Take pictures as you go so you remember how to put it back. Honestly unless you're experienced consider finding a technician—these old dot matrix printers can be finicky.

Opening an Epson LX-310 dot matrix printer usually means either 1) Opening the casing for repair/cleaning or 2) Opening the paper cover to load paper. I'll assume you mean for maintenance since paper loading is straightforward (lift the tractor cover).

Warning: Opening the main casing can be tricky and might void warranties or cause damage if not done carefully. Always unplug the printer first! Generally you'll need to remove the outer shell screws (often hidden under rubber feet or labels). The basic steps: 1) Remove the paper tractor unit (if present) by sliding it forward and lifting. 2) Remove all visible screws on the back and sides. 3) Gently pry apart the plastic housing halves starting from the back—they're usually clipped together. There's often a service manual available online. For a visual guide search for "Epson LX-310 disassembly" on YouTube where you can find step-by-step videos from technicians.

If you're just trying to clear a paper jam often you can access everything through the main cover or by opening the rear paper exit. For routine cleaning of the print head use the printer's self-cleaning utility from the driver software or front panel buttons instead of opening it up.