Summary

The white-plastic AC-powered KV-9PT40 (and its AC/DC-powered dark grey sibling the 9PT20) are both 9" viewable CRTs often referred to as "kitchen TVs" due to their compact size and ability to be mounted under cabinets if you have the optional hardware. They came in two colors: white (PT40) and dark grey (PT20). The white ones often experience plastic yellowing, and the grey ones seem prone to brittle plastic disease.

The 9PT20 and 9PT40, and although they look nearly identical to the 9PT50/60, have some critical differences internally. The 20/40 models use an LA7672 jungle chip which CANNOT be RGB modded. Additionally the 50/60 model has a digital OSD and service menu for color and geometry adjustment, while the 20/40 model uses analog potentiometers.

The 20 model has DC power input, the 40 model does not.

Literature

• User Manual
• Service Manual

Notes

Like most other 9-10" consumer-grade CRTs, this has imperfect horizontal linearity due to chassis design. There is no horizontal linearity correction coil to ensure the horizontal timing is consistent through the whole scanline. The circuit is omitted for cost cutting. This means if you view a grid pattern you will see the right side of the screen is squished horizontally. Generally you won't notice this during gameplay or viewing.

All adjustments are made with internal or external potentiometers.

There is a horizontal width coil inside you can adjust.

This CRT does not have horizontal static convergence (H-STAT) adjustment. All convergence adjustment must be done traditionally with the rings and convergence strips. Corner convergence is typically not great on these.