JVC Model 200 service manual Information Description, Source, Standard

Chapter 2---System Description

•Tint, sharpness, and color adjustment

•LED indication of Composite or S-video

•IIC serial bus interface

Comp

Yin C in

IIC_CLK

IIC_DATA

+5.1V

+15V

B2 R

B4 G

B6 B

B8 /H

B10 /V

B13

A13

B16	B12	/SELECT
B15

Pin callouts are to P12, P14, or P18, depending on which VIC slot is being used.

Figure 2-9.Quad Standard Decoder I/O Diagram.

LED Indication

There are two LEDs on this VIC. The LED on the right side of the board glows when Composite Video is selected and the LED on the left glows when S-Video is selected. Only one LED can light at one time.

IIC Interface

The Quad Standard Decoder VIC is controlled by the serial bus interface. The IIC bus comes from the System Controller Board through the Backplane Board. All required adjustments for this board are provided via the IIC serial bus interface. The information transferred over the IIC bus is indicated below (I = input to YPbPr_VIC, and O = output of YPbPr_VIC). The selection of this VIC is accomplished through the IIC control bus which provides the /SEL_VIC signal.

Table 2-4.Quad Standard Decoder VIC IIC Interface

I/O

Information

Description

I

SOURCE

Selects input source (Composite Video or S- Video)

I

STANDARD

Selects signal standard (AUTO/NTSC/PAL/SECAM/4.43NTSC)

Model 200 Service Manual 2-21