Description Of Qa Board Operations; Switching Of Video Signals - Sony VPL-PX32 Service Manual

3-6. Description of QA Board Operations

The QA board mainly switches between video signals and audio signals, and performs sync separation.

3-6-1. Switching of Video Signals

The input signals of this model are as follows:
INPUT A DSUB15 pin analog signal
5BNC analog signal
Digital signal
INPUT B DSUB15-pin analog signal
VIDEO COMPOSITE
Y/C
These signals are switched as shown in the following figure.
BA
COMPOSITE VIDEO
Y/C VIDEO
QA
INPUT A DSUB15
INPUT B DSUB15
INPUT A 5BNC
INPUT A DIGITAL
BB
3-10
VPL-PX32