Sony KV (AA-2D) 32V40

# Sony KV-32V40 (AA-2D chassis) CRT RGB mod

Below mod was performed on a Sony KV-32V40.

# CRT safety

READ THIS BEFORE CONTINUING

# Plan of attack

READ THIS TO PREPARE

# Theory

Sometimes it is nice to know the theory behind the mod. I have put this on a separate page. This shows how the various resistor values are calculated.

READ THE RGB MODDING THEORY

# Service manuals

• Sony KV-32V40 Service Manual

# Specs (KV-32V40)

• Manufactured: October 1998, San Diego, USA
• NTSC, 60 Hz - 180W
• Chassis: AA-2D
• OSD: CXP858-002 (IC001)
• Chroma: CXA2025 (IC351)

# Schematics

# Mux diagram

If you are building your own circuit, this diagram should help. The diagram is for KV-27V20, it will also work for other AA-2D chassis based Sony CRTs.

# Step 1: Remove the following components

Remove

• R1123
• R1128
• R133

# Step 2: Add a diode to blanking (optional, but recommended)

Blanking diode added. Helps reduce interference. This mod was performed without shielded cables internally and absolutely no interference was noticed.

Below picture was taken from KV-27V20

# Step 3: Connect RGB and blanking wires

Refer to the picture below for the correct soldering points for the R, G, B, and blanking wires. When soldering the R, G, and B wires, ensure you don't solder to the pad that is connected to the ground.

# Step 4: Connect audio, ground and sync wires

Now, it's time to turn our attention to the U board. In the image below, you can see where the audio, ground, and sync wires are connected.

• Red wire is audio right = grey wire on ribbon cable
• White wire is audio left = white wire on ribbon cable
• Black = black (common ground)
• Yellow = yellow (sync using luma input)

To enable the luma input, I chose to use a dummy S-Video plug. Essentially, this means simply plugging an S-Video cable into the S-Video port without connecting it to anything else. You can get creative with this setup by adding a switch to toggle luma on and off, permanently enabling luma, or even using a transistor to activate luma automatically when a SCART cable is connected using the 5V blanking signal. However, I opted for a straightforward and reliable solution with the dummy plug. This approach allows me to seamlessly use both S-Video and Composite input from the back panel whenever needed.

# Step 5: Build your mux circuit

Below mod uses the RGB mux board. This is optional, but will make your mod easier and stable. You can also create the circuit presented in the schematics above without the board. Please also checkout the precalculated resistor values.

Buy your RGB mux board

It is important to note that the blanking ground resistor (R10) is necessary to prevent strange black backgrounds from appearing on the KV-27S22 OSD text.

Picture of RGB mux rev B board

# STEP 6: Attach the female SCART connector to TV

Creating a SCART cutout and mounting it is an art. I have a dedicated section for it. How to create and mount a SCART female plug?

# Pictures

# Games & Pattern