Sony KD-34XBR2 - 34" Hdtv Fd Trinitron Wega, Training Manual

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11. Video Process - HA-3 and RA-5A Chassis
Chart 11-6 - HD Twin View Video Signal Path
HD Signal Path NTSC Signal Path
Stage Board Purpose Stage Board Purpose
DTV Tuner QM Input = Outside Antenna
Output = Component Video
Main NTSC
Tuner A Receives cable, or off the
air TV stations
Video 5, 6 U Video Input A/V Switch B Selects NTSC input
Component
Interface B Video buffer; H & V Sync
extraction. Output = Video &
Sync Analog
Video
Process B Inserts closed caption,
Detects ID1 aspect ratio
signal, parent control.
Input = composite video
Output
– Component
video & sync (not shown)
DTV Tuner
& Process QM Decodes one of 18 ATSC
formats. Input = Antenna
Outputs = component video. Main
Switch B Remains locked to the
main signal input
MID
Processor QM Selects Video 5/6 or DTV
input; H freq. change to
33.75kHz. DRC
Process QM Increases the pixel
number.
MID
Processor QM Creates two pictures on the
screen. MID
Processor QM Creates two pictures on
the screen.
OSD QM Video buffer, User Menu OSD
SW IC002 B Pass through only. Switch is
disabled from the service
mode.
Y/C CRT
Drive A Input = Component Video.
Output = RGB.
Adds Menu OSD from QM
board.
The MID Processor combines with the HD picture with
this input on the screen.
HD & Twin View Mode Video Troubleshooting
When there is a video problem in a high definition picture, you can use the twin picture mode and the built in video
generator to isolate the problem to a board without removing the back panel. The Video Adjustment section of
this book contains instructions on how to access the video generator from the service mode.