Sony KD-34XBR2 Training Manual page 60

These three (Main, DTV and Sub) signals are input to MID IC8703. This MID IC will select either one input for
normal TV operation or combine two inputs into a single picture for the Twin mode. The signal from MID IC8703
will continue into OSD IC8801.
IC – Signal Flow
IC8703
IC8801
IC8805
Video Process 3
Refer to Figure 11-15 to follow the signal flow. The conversion of Component video to a high-resolution picture by
the DRC and then being sized by the MID circuitry to fit on the screen is performed on the QM board. The
component video output passes through the B board into the A board. The (white) menus OSD at CN004/pins A7-
9 mix with the green OSD graphics (channel numbers, volume etc) from the main micro using Q9, Q11 and Q13.
The combined OSD signal and buffered component video are applied to Y/C CRT Drive IC3101 on the A board.
IC3101 mixes the video signal and OSD then converts the result into an RGB signal for the CRT on the C board.
V MID
TO
IC8601-
A/D
QM BD.
CN8801/
CN004
ALL
Y
A5
VIDEO
P
A4
B
P
A3
R
OSD R
A7
OSD G
B6
MENU
OSD B
A9
OSD
RGB
MAIN MICRO
M306V2MF
QM BD.
Chart 11-9b - QM board Signal Processing (continued)
MID-XA (Multi Image Driver)
OSD
D/A
HD VIDEO 5,6
FROM IC200-
COMP I/F
SW. IS SERVICE
MODE ENABLED
ONLY
C15
9
IC002
C16
SW.
14
M52055
C17
16
C13
Q9, Q11,
C12
Q13
C11
MIXER
P MUTE
67
C22
IC001
S DATA
31
B19
A20
28
S CLK
B BD.
IC004
NVM
FIGURE 11-15 - VIDEO PROCESS 3
IC Name
DRIVE
HORIZ.
VERT.
+
20
21 IC3101
Y/C,CRT
22
DRIVE
4
CXA2
5
150AQ
6
OSD
25 26
CN001/
S CLK
CN3020
S DATA
CN002/
S CLK
CN3022
A BD.
57
11. Video Process - HA-3 and RA-5A Chassis
Twin View, H freq. conversion
Buffer for video, Menu OSD
Analog Conversion
CN3101/CN9001
+12V
7
+12V
R
1 IC9001
62
G
3 IC9002
63
B
64
IC9003
5
58 8
IK Q9001
BUFF.
Q9002
10
P MUTE
P MUTE
G2
VOLTAGE
FROM
FBT (D BD.)
Purpose
CRT
CATHODES
SCREEN
VOLT.
SCREEN
CONT.
VOLT.
Q9014
TO CRT
Q9012
Q9008
R9053 R9083
R9064 R9084
C BD.
5TVP12 1322 8/30/01