JVC 250 Service Manual page 123

Chapter 5---Electronics
YPbPr VIC - Inputs
YPbPr Inputs
Y - green image input with composite horizontal and vertical sync (0.7-1 Vpp)
Pb - blue image input for YPbPr (0.7-1 Vpp)
Pr - red image input for YPbPr (0.7-1 Vpp)
GBR Inputs
Grn - green image input with composite horizontal and vertical sync (0.7-1 Vpp)
Blu - blue image input (0.7-1 Vpp)
Red - red image input (0.7-1 Vpp)
+15 V - power for analog circuitry
-15 V - power for analog circuitry
+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
YPbPr VIC - Outputs
RED_VIC - red image to Video Processor PCB (0.7-1.0 Vpp).
GRN_VIC - green image to signal Video Processor PCB (0.7-1.0 Vpp).
BLU_VIC - blue image to Video Processor PCB (0.7-1.0 Vpp).
SYNC - composite horizontal and vertical sync to Video Processor PCB.
/SEL_VIC - VIC select line to Video Processor PCB.
YPbPr VIC - Operation
This VIC accepts two input signal formats, YPbPr and GBR signals. The YPbPr
VIC converts either input signal format to the RGB format. The selection of the
VIC and inputs is controlled by the System Controller Board via the IIC serial bus
5-68
Figure 5-38 YPbPr VIC faceplate.
Model 250 Service Manual