Summary

35" CRT by Toshiba, made in the USA in 2004. Has RF, composite, s-video, and component inputs. The set essentially uses the same chassis as the 36A43 from the previous year. One of the very last CRTs Toshiba made for the North American market before handing Orion the job of manufacturing sets until ending production a few years later.

(Special thanks to Michael Lopez for the pics!)

Manuals

• Spec Sheet
• User Manual (36A43)
• Service Manual

Notes

35"-viewable screens were all but extinct by 2004, as 36" was the large-screen CRT size that succeeded it years prior. But for reasons that evade me, this model and it's flat counterpart were made despite there being 36" models by Toshiba the previous year. This seems to be the very last curved-screen 35" CRT ever made.

Composite 240p Performance, Disabling Vertical Edge Enhancement

by Eli Krause

I. For composite decoding this set uses a Toshiba TC90A53N, a 3-line digital comb filter. One beneficial feature of this comb filter is its "1-line color dot interference reducer circuit". Depending on the console/revision, dot artifacting ranges from slight to moderate, and blending effects may be broken. Using an external notch filter to decode composite instead^[1] and sending that to the s-video or component input would blend all dithering patterns and remove nearly all dot artifacts.

II. Just as velocity scan modulation is intended to increase contrast at horizontal edges, vertical edge enhancement artifically boosts contrast at vertical edge transitions for composite and RF sources, changing the color palette in the process. To reduce this to its minimum, the high signal sent to pin 17 of the comb filter must be brought low which can be achieved by removing the resistor leading to that pin. On the AV-20D202 and AV-27D302 it is R239 on the bottom of the main board. On the AV-32D502 and AV-32D302 it is R247.