JVC 370 SC, 330, 340 SC service manual Correction Amplifiers, Rxcorr Rycorr Gxcorr Gycorr Bxcorr

Chapter 2—Functional Description

Correction Amplifiers

There are six (6) correction amplifiers. Each one receives a real-time convergence correction signal:

RXCORR.

RYCORR.

GXCORR.

GYCORR.

BXCORR.

BYCORR, from the SCB convergence section.

The X-correction amplifiers, R, G, and B, also receive the horizontal linearity signal. The horizontal linearity signal is then combined with the appropriate color's X-correction signal to produce a composite horizontal correction signal. The Y-correction amplifiers, R, G, and B, receive the top and bottom pincushion and keystone correction signal. The pin and key correction signal is then combined with the appropriate color's Y-correction signal to produce a composite vertical correction signal. All six (6) correction signals are then amplified by the correction amplifiers and are sent to their respective yoke coils.

Serial Communication

The VDB uses two (2) separate, interrelated serial data communication systems to communicate with the SCB; the IIC bus, and a differential, synchronous data bus. The information transferred over the serial busses is indicated below (I = input to VDB, 0 = output from VDB). Also noted is whether the information is transferred over the IIC or the serial bus. A change in output data generates an interrupt pulse.

Model 330, 340SC and 370SC Service Manual 2-37