Chapter 2 - Lab Safety Procedures Overview
Learn about lab safety procedures, electrical safety, fire safety, ESD protection, tool safety, and workspace safety with video tutorials.
2026-08-19 · 3 min read
Hello my friend! Today we learn together Chapter 2: Lab Safety Procedures Overview with simple explanation and video tutorials in Khmer language! Hope you learning this lesson and get more knowledge from this! Let's enjoy it!
If you want to see all lessons list, check out All Chapters of Computer Fundamentals! Now let's get started!
1. Protecting People (Personal Safety Rules)
When you open computer case or fix hardware in lab, your safety is number ONE important!
- Keep First-Aid Kit Ready : Always know where first-aid box is inside computer lab room.
- Remove Jewelry & Metal Rings : Take off watch, ring, necklace before touching inside computer case (metal can conduct electricity and burn finger!).
- No Food & No Drinks : Never bring water, coffee, or snacks near repair desk. If liquid spill inside computer, it cause short circuit and shock!
- Electrical Safety : Always turn off power and unplug power cable before opening PC case. Be careful with hot parts around laser printers and AC power adapters!
⚠️ Safety Warning: Never open CRT monitors or Power Supply Unit (PSU) inside! They store super high voltage electricity even when unplugged from wall socket!
Watch Video Tutorial (Part 1: Lab Procedure & Tools)
2. Protecting Equipment & Data
Computer hardware parts (especially CPU and RAM chips) are very sensitive to ESD (Electrostatic Discharge) static electricity from your hands!
- ESD Protection : Use ESD wrist strap or touch unpainted metal computer case to discharge static electricity before touching electronic circuit board.
- Temperature & Humidity : Keep computer lab room cool and clean. Too hot or too wet humidity will damage PC components.
- Proper Disposal & SDS : Follow Safety Data Sheets (SDS) rules when throwing away old batteries, chemical cleaners, or monitor screens. Don't throw harmful chemicals in normal trash bin!
💡 Pro Tip: Always wear an ESD Anti-Static Wrist Strap connected to grounded PC case frame before touching RAM sticks or motherboard!
Watch Video Tutorial (Part 2: Equipment Protection & Tools)
3. Proper Use of Computer Tools
A good technician uses correct tool for correct job:
- Hand Tools : Screwdrivers (Phillips #1, #2), flathead, needle-nose pliers, wire cutters.
- Cleaning Tools : Compressed air can, lint-free cloth, isopropyl alcohol (never use water to clean circuit boards!).
- Diagnostic Tools : Multimeter for measure voltage, digital cable tester for LAN network cables.
- Documentation & Reference : Keep repair journal notebook, write down steps when taking apart laptop, and check manufacturer manuals.
💡 Pro Tip for Technicians: Put small screws inside magnetic parts tray or pill organizer box so you never lose tiny screws when reassembling computer!
💡 Want to learn more? Check full lesson list here: All Chapters of Computer Fundamentals!
Happy learning and stay safe in computer lab, my friend!