Introduction
The Sony KV-27S42 is a classic CRT television, and while it’s no longer in production, many enthusiasts still repair, modify, or salvage these sets. However, disassembling a CRT TV requires caution—high-voltage components and delicate electronics mean one wrong move could be dangerous.
This guide will walk you through the full disassembly process of the KV-27S42, covering:
✔ Safety precautions (CRT discharge, avoiding shocks)
✔ Tool requirements (what you’ll need)
✔ Step-by-step teardown (removing the case, tube, and boards)
✔ Salvaging useful parts (what to keep or discard)
✔ Reassembly tips (if needed)
Whether you’re repairing, modding, or recycling, this guide ensures you do it safely and efficiently.
Why Disassemble a KV-27S42?
Before diving in, it’s worth understanding why you might need to take apart this TV:
🔹 Repairs – Fixing power supply issues, bad capacitors, or video problems.
🔹 Modifications – RGB or component video mods for retro gaming.
🔹 Salvage – Reusing the CRT, speakers, or other parts for projects.
🔹 Safe Disposal – CRTs contain hazardous materials (lead, phosphors) and must be recycled properly.
Warning:
⚠ CRTs hold high voltage even when unplugged – improper handling can result in severe electric shock.
⚠ The tube is heavy and fragile – dropping it can cause implosion or injury.
Tools & Safety Gear You’ll Need
Before starting, gather these essentials:
Essential Tools
✔ Screwdrivers (Phillips & flathead)
✔ CRT discharge tool (or insulated screwdriver + wire)
✔ Needle-nose pliers (for small connectors)
✔ Anti-static wrist strap (optional but recommended)
Safety Precautions
✔ Work in a dry, well-lit area
✔ Discharge the CRT before touching anything
✔ Wear gloves & safety glasses (glass shards are sharp)
✔ Keep pets/kids away (CRTs are dangerous when mishandled)
Step-by-Step Disassembly Guide
Step 1: Unplug & Discharge the CRT
- Unplug the TV and wait at least 30 minutes for capacitors to discharge.
- Locate the anode cap (the large rubber suction cup on the CRT).
- Discharge the CRT:
- Use a CRT discharge tool (best option).
- Alternative: Clip one end of a wire to the TV’s metal frame and carefully slide a flathead screwdriver under the anode cap until you hear/see a small spark.
Step 2: Remove the Rear Cover
- Flip the TV face-down on a soft surface (blanket/towel).
- Remove all rear screws (some may be hidden under stickers).
- Gently pry the back cover off—plastic tabs may hold it in place.
Step 3: Disconnect Internal Cables
- Take photos of all connections before unplugging anything.
- Unplug:
- Deflection yoke (two large plugs near the tube neck)
- Anode cap (already discharged, but still be careful)
- Speaker wires & control board connectors
Step 4: Remove the CRT Tube
- Unscrew the 4 CRT mounting brackets (they hold the tube to the frame).
- Carefully lift the tube out – it’s extremely heavy (get help if needed).
- Set it face-down on a soft surface to avoid scratches.
Step 5: Extract Circuit Boards & Other Components
- Mainboard – Remove screws and gently lift it out.
- Power supply – Disconnect all wires before removing.
- Speakers & tuner – Useful for retro projects if salvaging.
Pro Tips for Safe Disassembly
🔧 Label every wire and screw (masking tape + marker) to avoid confusion later.
🔧 Use a magnetic tray to keep screws organized.
🔧 If keeping the CRT, store it upright to avoid stress on the glass.
What Can You Salvage?
If you’re parting out the TV, these components are useful:
✅ CRT tube – Great for arcade builds or replacements.
✅ Speakers – Decent quality for DIY audio projects.
✅ Power supply & mainboard – Useful for electronics tinkering.
✅ Control knobs & buttons – Handy for retro mods.
How to Dispose of a CRT Safely
CRTs contain leaded glass and toxic phosphors, so never throw them in the trash. Instead:
♻ Check local e-waste recycling centers (many accept CRTs for free).
♻ Contact electronics repair shops – Some may take old TVs.
♻ Look for CRT buyback programs (some collectors pay for working tubes).
Conclusion: How to Disassemble a Sony KV-27S42 CRT TV
How to Disassemble a Sony KV-27S42 CRT TV, requires patience and safety awareness, but it’s a rewarding project for retro tech enthusiasts. Whether you’re fixing, modding, or salvaging, following this guide ensures a smooth process.
FAQ About How to Disassemble a Sony KV-27S42 CRT TV
1. Can I get shocked if the TV has been unplugged for days?
Yes! CRTs can hold charge for weeks. Always discharge before working.
2. How heavy is the KV-27S42 CRT?
Around 50-60 lbs (23-27 kg)—lift carefully or get help.
3. Can I reuse the CRT in another TV?
Possibly, but tube swaps require matching specs (size, impedance, etc.).
4. What if I break the CRT?
The glass is under vacuum—if it cracks, it can implode. Wear safety gear!
5. Is it worth repairing a KV-27S42?
If you love CRTs, yes! These Sonys have great picture quality for retro gaming.
