JVC 250 service manual RGBHV VIC - Inputs, RGBHV VIC - Outputs, RGBHV VIC - Operation

Chapter 5---Electronics

RGBHV VIC - Inputs

R - red image from source input (0.7-1.0 Vpp).

G - green image from source input (0.7-1.0 Vpp).

B - blue image from source input (0.7-1.0 Vpp).

H - horizontal sync from source input

V - vertical sync from source input

+15 V - (not used)

-15 V - (not used)

+5.1 V - power for digital circuitry

+5.1 V Stdby (not used)

IIC CLK - IIC clock line

IIC DATA - IIC data line

IIC SINT - IIC interrupt line

RGBHV VIC - Outputs

RED_VIC - red image to the Video Processor PCB (0.7-1.0 Vpp).

GRN_VIC - green image to the Video Processor PCB (0.7-1.0 Vpp).

BLU_VIC - blue image to the Video Processor PCB (0.7-1.0 Vpp).

H_VIC - horizontal sync to the Video Processor PCB

V_VIC - vertical sync to the Video Processor PCB

/SEL_VIC - VIC select line to the Video Processor PCB

RGBHV VIC - Operation

The RGBHV VIC receives the separate red, green, blue image inputs and horizontal, and vertical sync inputs from the source input device and passes them directly through to the Video Processor PCB without any signal processing. The VIC receives a SELECT command from the System Controller PCB through the IIC data bus to activate the VIC. The VIC sends a /SEL_VIC to an internal Input Switcher (Mux) on the Video Processor PCB tell it which VIC is selected. An operator selects the VIC in the Channels Menu (see section 4-6 in the User’s Guide).

A green LED is illuminated when the VIC is selected.

RGBHV VIC - Service Adjustments

There are no service adjustments on the RGBHV VIC

RGBHV VIC - Remove and Replace

Tools Needed

#0 Posi-drive Phillips-head screwdriver

5-60 Model 250 Service Manual