Summary

One of Sony's last curved Trinitrons, released in 1999 and sold at least as late as 2001. Similar in appearance and features to the KV-27S42, but uses the AA-2D chassis.

Manuals

• User Manual
• Service Manual

Notes

A similar 32" model with this design, the KV-32S66, was also produced. It features a second A/V input and Picture-in-Picture.

The jungle chips used in the AA-2D chassis Trinitrons are very versatile, and these TVs can be modified for RGB and/or Component video.

Disabling Velocity Modulation

Most of the AA-2D Trinitrons contain a velocity modulation circuit. VM enhances dark outlines on screen, which helps hide composite dot crawl and can make TV and movies look better. However, it ruins pixel art and significantly degrades the appearance of 2D games. Unfortunately, this cannot be turned off in the user or service menus and must be physically disconnected.

Note - These instructions only apply to the following 32" AA-2D models: 32S42, 32S66, and 32V42. For the 35" counterparts, 35S42, 35S66, and 35V42, the CN941 connector on the WA board should be disconnected for the same results.

The VM circuit is located on the WB board, which is attached directly to the neck of the tube:

To disable it, just disconnect the cable from connector CN2941 on the WB board:

You can either remove it completely, or just fold it back on itself and secure it with the purse lock tie:

Composite 240p Performance

by Eli Krause

For composite decoding this set uses the Sony CXD2073S, a 2-line digital comb filter used in many models from their 1997-1999 lines. As with all 2-line comb filters, the amount of dot artifacting added to 240p content is severe. If the set has an AA-2D chassis, then the set's own internal notch filter can be enabled in the service menu - NOTC 1, which will avoid the horizontal dot artifacts caused by the comb. If the set has a BA-4D chassis then there is no service menu option to enable the notch. But if the set has an s-video input (or if it has been modded for component input, or if one does not want to toggle a value in the service menu when switching to and from using composite), then using a good external notch filter to decode composite instead, and sending that to the set would properly blend all dithering patterns and avoid nearly all dot artifacts. Guide to using an external notch filter with a CRT is here.