Hughes JVC 220, Service Manual

Page: 33 / 140

Chapter 2---System Description
further subdivided into inputs and outputs. Input refers to an Input
to the YPbPr_VIC, output refers to an output from the YPbPr_VIC.
Table 2-5. HDTV VIC Signals
PROJECTOR INPUTS
INPUT DESCRIPTION
Y/G
Pb/B
Pr/R Video input signals-about 0.7 to 1 VPP
VIDEO PROCESSOR BOARD
OUTPUT DESCRIPTION
/SELECT Selection indicator for VIC. Low indicates the selected YPbPr_VIC.
RED
GRN
BLU Video signals. about 0.7 to 1 VPP
HOR Composite horizontal / vertical sync signal
SYSTEM CONTROLLER BOARD
INPUTS DESCRIPTION
IIC_CLK IIC clock line. Unidirectional clock line for control of synchronous
data transfer over the IIC bus interface.
IIC_DATA IIC data line. Bidirectional serial line for synchronous data transfer
between system control board and the YPbPr_VIC.
OUTPUTS DESCRIPTION
/IIC_INT IIC interrupt line. YPbPr_VIC does not initiate any interrupt
LOW VOLTAGE POWER SUPPLY
INPUTS DESCRIPTION
+5.1 V +5.1 V supply for use by YPbPr_VIC.
+15 V + 15 V supply for use by YPbPr_VIC.
-15 V -15 V supply for use by YPbPr_VIC.
Interlocks and protection
Inputs:
None
Model 220 Service Manual 2-19