Overall Sync Path - Sony KD-34XBR2 Training Manual

A board – The Y/C CRT Drive IC3101 converts the input video to RGB, mixes any OSD and outputs the combined
signal to the CRT on the C board.
In the twin picture mode, the DTV picture or video 5 or 6 high resolution input will always appear on the left side
and never swap places. Video 5, 6 or a DTV station CANNOT be selected in the right picture.

Overall Sync Path

The sync paths for the analog and digital TV tuner and video inputs are shown in Figure 11-5. The sync is first
stripped from the video on the left B board. Both the main and sub sync signals input the QM board as NTSC
standard, but leaving is 33.75kHz to match that of the TV' s horizontal oscillator frequency. Normally switch IC006
on the right part of the B board just passes the 33.75kHz from the (QM board' s) MID circuit. IC6 only selects the
sub path sync when the HD High Pass mode is selected from the service mode. See the Conv. Adjustments
Overview section for details.
B BD.
A/V
VIDEO
SW./
1-6
VIDEO
IN
PROCESS
Figure 11-4 - Twin
Picture Mode with
Digital Input
TUNER
QM BD.
MAIN
H
A8
B8
V
MID
H
A4
B4 V
SUB
CN005/
DTV
CN8601
B BD.
FIGURE 11-5 - HA-3 SYNC PATH
11. Video Process - HA-3 and RA-5A Chassis
DTV or
HD pix
B BD.
CN8801/
CN004
H
A6
B6
V
IC6
HD SW
PASS
IC001
MICRO
43
Main pix
A BD.
CN001/
CN3020
H
A6
B6 V
SUB
IC3101
SYNC
Y/C
CN3174/
V
CN5503
3 4
V, H DRIVE
(D BD.)
2
H DRIVE
(D BD.)
42TVP12 1357 8/30/01