73
15. Convergence Adjustment Overview - HA-3 Chassis
HD
PIX
IC002
SW.
Y/C
CRT DRIVE
COMPONENT
I/F
OSD
MID
PROCESS
DTV
TUNER &
PROCESSOR
HD INPUTS
480p
720p
1080i
B BD.
QM BD.
A BD.
U BD.
VIDEO
5,6
RGB OUT
TO C BD.
8/31/01
10TVP12 1328
HIGH DEF
PASS-THROUGH
SERVICE MODE ENABLED
FIGURE 15-2 - HD VIDEO PATH
Procedure
Rerouting the HD video path is done from the service mode. The Q board must remain connected (CN8801 for
communications and CN7001 for power) for you to see the servicing mode OSD to make the change.
1. Enter the service mode (Display, 5, , Power On).
2. Select category “OP” (buttons 2 and 5).
3. Select item “HDPT” (buttons 1 and 4) (HDPT means High Definition Pass Through, item 5).
4. Change its data from 0 to 1.
Only a 1080i video input signal will display a picture because it solely has a 33.75kHz signal frequency that
matches the TV’s horizontal frequency of this Hi-Scan TV. All the other signal inputs must be converted by the
MID circuitry within the Q box (Q boards) to view. Chart 15-4 shows the horizontal frequency of the DTV formats
at the popular 60Hz Vertical frequency.
Chart 15-4 – Input signal H. Frequency
Input signal
Horizontal Frequency
Standard NTSC 480i
15,734 Hz
High Resolution 480p
31.5kHz
High Resolution 720p
45.kHz
High Resolution 1080i
33.75kHz
Summary of Contents for KD-34XBR2 - 34" Hdtv Fd Trinitron Wega
Page 77: ...74 RA 5A Chassis Board Layout ...
Page 108: ...APPENDIX ...
