How to Disassemble KV-27S42

The Sony KV-27S42 is a vintage Trinitron television model cherished for its quality CRT display and durable build. While modern TVs are flat, sleek, and often fragile, the KV-27S42 stands as a bulky but sturdy piece of tech. Whether you’re repairing, salvaging parts, or just curious about the inside of this retro device, disassembling it requires caution and precision. In this article, we’ll walk you through the safe and effective steps How to Disassemble KV-27S42.

Table of Contents

Safety First: Important Precautions Before You Begin

Disassembling any CRT television, including the KV-27S42, can be dangerous. CRT TVs carry high voltages even when unplugged. The capacitor and the picture tube (the CRT) can retain a lethal charge. Before you begin, make sure to:

Unplug the TV completely from any power source.
Work in a well-ventilated, dry environment, away from pets or children.
Wear safety gloves and goggles to protect your hands and eyes.
Use insulated tools when dealing with internal components.

If you’re not confident working around high-voltage electronics, it’s best to consult a professional.

Tools You’ll Need

Before starting the disassembly process, gather the following tools:

A flathead screwdriver
A Phillips-head screwdriver
A pair of needle-nose pliers
A small container to keep screws
A discharge tool or a high-voltage probe (for CRT safety)

Having all your tools ready helps avoid unnecessary delays or mistakes during the process.

Step 1: Remove the Back Cover

Lay the TV screen-side down on a soft surface like a blanket or a thick towel to avoid scratching the screen.
Locate and remove the screws around the edges of the plastic back panel using your Phillips-head screwdriver.
Once the screws are removed, gently lift the back panel straight up. It might need a slight wiggle but avoid using excessive force.

The inside will reveal the circuit boards, CRT, and other components.

Step 2: Discharge the CRT Safely

The CRT can hold a charge of up to 25,000 volts, so discharging it is the most critical safety step.

Use a CRT discharge tool or a high-voltage probe connected to a grounded wire.
Place the tool under the suction cup anode cap located on the side of the picture tube.
Discharge it by touching the anode cap terminal and holding it there for a few seconds.
Once discharged, remove the anode cap carefully by squeezing and lifting it out.

Never touch the anode without discharging the tube first.

Step 3: Detach the Circuit Boards

Identify the main circuit board located at the bottom of the TV.
Unplug all ribbon cables and connectors that link the board to the CRT or other components. These should pull out gently, but make note of where each one goes.
Remove any screws or clips holding the board in place.
Gently slide the circuit board out of the base.

Be cautious not to damage the copper traces or the connectors, especially if you plan to reuse or repair the board.

Step 4: Disconnect the CRT Neck Board

At the rear of the CRT, you’ll find a small neck board attached to the glass tube.

Carefully pull the neck board straight off the CRT tube. Avoid bending or twisting.
Disconnect any remaining wires or grounding clips.

Be extra cautious here, as applying too much pressure could crack the CRT glass, which may implode if compromised.

Step 5: Remove the CRT from the Casing

Locate the four large mounting bolts securing the CRT to the front casing.
Unscrew these bolts while supporting the front of the tube — it’s heavy and fragile.
With the bolts removed, carefully lift the CRT out of the plastic casing.

You may want a second person to help, as the CRT is awkwardly shaped and can weigh over 50 lbs.

Final Thoughts: Handle With Care

Disassembling the KV-27S42 is not just a technical task—it’s an exercise in patience and safety. Whether you’re doing it for restoration, recycling, or parts salvaging, remember:

Always prioritize safety, especially around the CRT.
Document where each component and screw goes to aid in reassembly.
Don’t attempt to reuse a damaged CRT—it can be extremely hazardous.

While old-school electronics like the How to Disassemble KV-27S42 may not match today’s sleek smart TVs, they represent a bygone era of quality engineering. Disassembling them respectfully is a way to honor that legacy.