DESCRIPTION
The STV7778S is a monolithic integrated circuit assembled in a 42 pins shrunk dual in line plastic package.
The goal of this IC is to control all the functions related to the horizontal and vertical deflection in a multimodes or multisync monitor. As can be seen in the block diagram, the STV7778S includes the following functions :

- Positive or Negative sync polarities,
- Auto-sync horizontal processing,
- H-PLL lock/unlock identification,
- Auto-sync Vertical processing,
- East/West signal processing block,
- B+ controller,
- Safety blanking output.