Sony KD-34XBR2 Training Manual page 55

HD Signal Path
Stage Board
DTV Tuner QM
Video 5, 6 U
Component B
Interface
DTV Tuner QM
& Process
MID QM
Processor
MID QM
Processor
OSD QM
SW IC002 B
Y/C CRT A
Drive
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.
Chart 11-6 - HD Twin View Video Signal Path
Purpose
Input = Outside Antenna
Output = Component Video
Video Input
Video buffer; H & V Sync
extraction. Output = Video &
Sync
Decodes one of 18 ATSC
formats. Input = Antenna
Outputs = component video.
Selects Video 5/6 or DTV
input; H freq. change to
33.75kHz.
Creates two pictures on the
screen.
Video buffer, User Menu OSD
Pass through only. Switch is
disabled from the
mode.
Input = Component Video.
Output = RGB.
Adds Menu OSD from QM
board.
11. Video Process - HA-3 and RA-5A Chassis
Stage
Main NTSC
Tuner
A/V Switch
Analog
Video
Process
Main
Switch
DRC
Process
MID
Processor
The MID Processor combines with the HD picture with
this input on the screen.
service
52
NTSC Signal Path
Board
A Receives cable, or off the
air TV stations
B Selects NTSC input
B Inserts
Detects ID1 aspect ratio
signal,
Input = composite video
Output
video & sync (not shown)
B Remains locked to the
main signal input
QM Increases
number.
QM Creates two pictures on
the screen.
Purpose
closed caption,
parent control.
– Component
the pixel