Onyx J Board Sync Selector - Panasonic GP6DU Technical Manual

ONYX J Board Sync Selector

Figure 14 - J Board Sync Selector
RGB/PC Input Mode
The vertical and horizontal sync signals of the input video signals are applied via
connector J11, J12 or HX1 to the Sync selector IC, IC8001. The selected vertical and
horizontal sync signals are then output to the sync processor IC, IC8003. The signals
from IC8003 are applied to IC8005 for wave shaping and inversion. The vertical and
horizontal sync signals exit the J-board and enter the D-board via pins 16 and 18 of the
connector J1/D1.
The horizontal and vertical drive signals of the HX board (PC input) are inverted by
IC8016 and output to the D-board via pins 17 and 20 of the connector J1/D1.
Composite/ Component Video Input mode
The luminance (Y or G) signals are applied to an input switch (IC3005). The selected
Sync signals output by IC3005 are applied to the sync processor circuit (IC8003). The
horizontal and vertical pulses are separated from the Y or green signal and supplied to
IC8005 for wave shaping and inversion. The sync signals are then output to the D-
board via pins 16 and 18 of the connector J1/D1.
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