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DP-4X AUDIO SIGNAL SELECTION PATH EXPLANATION
AUDIO SIGNAL SELECTION PATH EXPLANATION.
(See Audio Select Selection Path Circuit Diagram for Details)
The Microprocessor I004 communicates with the Audio Selector IC I401 via I
SDA2 via pin 31 and SCL2 via pin 28. These communications lines arrive at I401 on pins 22 and 23 respectively.
This allows the Microprocessor to select the appropriate audio input in accordance to the Main Picture displayed
by the Customer.
Audio Inputs to I401:
•
U301 Main Tuner Audio:
The Left Audio is output from the Main Tuner pin 26. Then out the PTU2 connector pin 16. Then ar-
rives at the Audio Selector IC pin 36.
The Right Audio is output from the Main Tuner pin 27. Then out the PTU2 connector pin 17. Then ar-
rives at the Audio Selector IC pin 35.
•
U302 Sub Tuner Audio:
The Mono Audio is output from the Sub Tuner pin 14. Then out the PTU2 connector pin 1. Then arrives
splits into two paths and arrives at the Audio Selector IC pin 34 and 33.
•
HDMI 1 Audio:
The Left Audio arrives at the Audio Selector IC pin 14.
The Right Audio arrives at the Audio Selector IC pin 13.
•
Video Input 1 Audio:
The Left Audio arrives at the Audio Selector IC pin 10.
The Right Audio arrives at the Audio Selector IC pin 11.
•
Video Input 2 Audio:
The Left Audio arrives at the Audio Selector IC pin 7.
The Right Audio arrives at the Audio Selector IC pin 8.
•
Video Input 3 Audio:
The Left Audio arrives at the Audio Selector IC pin 5.
The Right Audio arrives at the Audio Selector IC pin 6.
•
Video Input 4 Audio:
The Left Audio arrives at the Audio Selector IC pin 4.
The Right Audio arrives at the Audio Selector IC pin 3.
•
Video Input 5 Audio:
The Left Audio leaves the PFS2 connector pin 9 and arrives at the Audio Selector IC pin 1.
The Right Audio leaves the PFS2 connector pin 2 and arrives at the Audio Selector IC pin 2.
•
Digital Tuner Audio: Not in the DP-43 Chassis
The Left Audio leaves the Digital Module from pin 47 and arrives at the Audio Selector IC pin 15.
The Right Audio leaves the Digital Module from pin 46 and arrives at the Audio Selector IC pin 16.
Note: If the Main Video Selection is something other than the Digital Module (ATSC) the selected au-
dio is routed back into the Digital Module. This way, there's always a Optical Digital Audio Output
from the Digital Tuner if an external Decoder is used with Optical Inputs.
2
C communication. It outputs
(Continued on page 04-02)
PAGE 04-01
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