Summary

27" silver curved consumer TV from JVC, part of the D-Series line from 2001. Uses a Toshiba jungle IC which can be tapped for analog RGB.

Manuals

• User Manual
• Service Manual

Media & Promo Materials

• JVC Product Page
• Circuit City Ad, June 2001, $349
• Consumer Reports March 2002, p. 24-25, $350

Mods & Repair Guides

• Turning Off Red Push on 2001 JVC D-Series AV-XXDX02

Notes

Picture quality on this set is good by default, but reds are overblown pushed. Be aware that settings for red push are saved separately for different inputs and picture modes. To disable for all combinations, see full instructions under Mods & Repair Guides.

The tube in this model can be identified based on the letter beside the serial number: "R" for RCA, and "S" for Samsung. The pics you see are of the Samsung tube with low hours and it's fantastic! Very sharp and clean. Picture was set with red push disabled, and sharpness set to 25%.

Component quality can suffer from gamma luminance errors at certain horizontal transitions, which present as an aberrant darkening between two colors. See the picture of the palm trees in the gallery below and notice that the sky doesn't make a clean transition from blue to the green left edge of the palm leaves, but rather there is a dark line created between the two.

Starting in this model year, the ability to adjust horizontal width and pincushion is absent.

Saving Picture Settings

Unlike most sets which automatically save changes made to the picture settings, changes made to the picture settings in the user menu will not save unless one first enters "SET VIDEO STATUS" and then selects "SAVE AS CHOICE". This is also covered in page 31 of the owner's manual.

In order to store changes made to the the picture settings in the user menu:

1. First compare which color temperature you prefer by pressing the Video Status button on the remote, as this will be the starting point for your custom picture settings. Select 'Theater' if you would like a color temperature closer to reference 6500K, or 'Standard' to have a much more blue color temperature.
2. Press Menu, then CH- until you reach "SET VIDEO STATUS" and press Vol+
3. Make all your picture settings adjustments, and then select "SAVE AS CHOICE"
4. After that, you can select Choice as the Video Status to recall your settings.

Selecting 'Choice' will have the same picture settings for all inputs. If you would like to customize the picture settings per input, then the way to go about this is to set the Video Status to Standard, and then customize each source in the service menu, as detailed here.

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] (such as is available in a RetroTink scaler) and sending that to the 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. 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 it is R247.