Sony (AA-2C) KV-32XBR48

# Sony (AA-2C) KV-32XBR48 CRT RGB mod

The Sony KV-32XBR48 is a 32" curved Trinitron CRT television. Released in the late 1990s as a high-end XBR model, it is recognized for its component video inputs and curved screen, a rare combination.

View full CRT details and more mod examples →open in new window

This tutorial is also applicable for the below models:

• Sony KV-32XBR48
• Sony KV-35XBR48

# Table of Contents

# Contributors

Thank you to everyone who contributed to this guide:

• Kaz Packmanopen in new window — contributor, RGB mod and pictures

# CRT safety

READ THIS BEFORE CONTINUING

# Plan of attack

READ THIS TO PREPARE

# Manuals and Datasheets

• Sony KV-32XBR48 Service Manualopen in new window

# Specs

• Manufactured: Mexico (1997)
• Chassis: AA-2C
• Tube: Sony FD Trinitron M80JYV51X
• Jungle Chip: Sony CXA2025AS
• OSD Chip: CXP85856A-001S
• Power: 195 W

# RGB mux diagram

Prepare the mux diagram. If you are building your own circuit, this diagram should help.

# Performing the mod

# STEP 1: Remove the following components

• R1123
• R1128
• R133

# STEP 2: Connect RGB and blanking wires

Inject R, G, B where the resistors were removed, but on the pad that is not connected to the ground.

# STEP 3: Add a diode to blanking

Add this diode to reduce interference.

With diodes, direction matters. Please make sure to install it such that the stripe is pointing towards the chroma/jungle chip. The idea here is to make sure external blanking current doesn't reach the OSD chip.

# STEP 4: Connect audio and sync wires

For this mod, the Video 1 S-Video input was used for Sync and audio injection. For the S-Video input to work for this purpose, a jumper wire was soldered between the two shield pads of the connector as seen in the picture.

Alternatively, you can inject Sync into the Video 4 Component Luma input and audio into its respective audio input pads if you wish to use that input for RGB instead. A dummy RCA plug was connected to the Right Audio input to preserve Stereo functionality when using RGB SCART.

# STEP 5: Disconnect VM wires to reduce artificial sharpening

This set uses Velocity Modulation (VM), which can degrade the picture quality if not disconnected. It cannot be disabled in neither the user settings nor service menu, so it must be disconnected physically from the set.

You can do this in either one of two ways:

• Method 1: Permanently disconnect the 8-pin cable coming from CN941 on the WA board, which is the board on the CRT neck placed between the deflection yoke and the neckboard.

• Method 2: Remove the white wire from the 8-pin cable coming from CN941 on the WA board. To do this, unplug the cable from the WA board, place a pointed object in the catch on the plastic housing where the pin is located, pull out the wire from the connector housing while holding the pointed object in the catch to release it, then plug the cable back into the WA board without the white wire connected. It would be a good idea to isolate the metal crimp on the wire with Kapton tape to avoid shorting it out.

# STEP 6: Build your mux circuit

This 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 mux calculatoropen in new window to play with your own values.

Compatible mux boards:

• RGB MUX BOARD KIT 1.4Copen in new window
• RGB MUX BOARD KIT 1.4Bopen in new window
• RGB MUX BOARD KIT 1.5Copen in new window

Buy your RGB mux board kit

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

Mux mod in action

# TV

Front

# Pictures

# Reference Photos

See more photos and contributions →open in new window