Filter
Top Products
7-13
36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 20 19 18
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
R
BRIGHTNESS
G
BRIGHTNESS
B
BRIGHTNESS
R
HOLD
R
AMP
G
HOLD
G
AMP
B
HOLD
B
AMP
R
BLANKING
R
OSD MIX
G
BLANKING
G
OSD MIX
B
BLANKING
B
OSD MIX
R
CONTRAST
R
CLAMP
G
CONTRAST
G
CLAMP
B
CONTRAST
B
CLAMP
MAIN
OSD ADJUST
SUB OSD
ADJUST (R)
SUB OSD
ADJUST (B)
MAIN
BRIGHTNESS
OUTPUT (G)
BLK IN INPUT (R)
V
CC1
(R) SUB CONTRAST
(R)
GND2 (R) INPUT (G) GND IN (G) V
CC1
(B) SUB CONTRAST
(B)
GND2 (B) CP IN
OSD IN (R) V
CC1
(G)
SUB CONTRAST
(G)
GND2 (G) INPUT (B) OSD IN (B) MAIN
CONTRAST
OUTPUT (R) HOLD (R) GND2 (R) GND2 (B)OUTPUT (R) HOLD (B)
SUB OSD
ADJUST (G)
V
CC2
(G)
HOLD (G) GND2 (G)
NC
V
CC2
(R) V
CC2
(B)
The sync signal process circuit is applicable to the HD,
VD, CS (composite sync), SYNC/G signals. HD (CS), VD
and G signals developed from QB011 enter the sync
separation IC (QB012: M52347FP). The sync separation
priority of the sync separation IC is; HD, VD, CS and
SYNC ON G in this order.
The HD and VD signals sync-separated enter the buffers
QB019 and QB020 (TC7S08F) and the outputs are sent
to the digital PC board.
Fig. 7-4-3
7-4-3. RGB Signal Amplifier Section
The RGB signal processing section employs a wide band
RGB signal IC applicable to the XGA signal. Fig. 7-4-3
shows a block diagram of QB024 (M52320SP). The
control items of the IC are five items; main contrast,
brightness and sub contrast for each RGB.
The brightness and main contrast controls are provided
for the user adjustment, and the sub contrast are provided
to equal the R, G, B levels when entering A/D converter
of the digital PC board.
Fig 7-4-2
2
5
7
8
13
14
9
11
13
16
17
18
25
22
21
1
2
3
5
4
1
4
6
8
20
17
14
13
VD
RGB IN
HD/CS
QB011
M52348FP
Q512
TC74HCT240AF
QB020
TC7S08F
VD
R
G
B
H OUT
G OUT
V OUT
V
DD
G IN
HD
VD
V IN
H/CS
IN
RGB/VD
VIDEO/R
VIDEO/G
VIDEO/B
VIDEO/HD
VIDEO/VD
QV005
TDA9141
RGB/HD
1
2
3
5
4 HD
+5V
+5V
QB019
TC7S08F
QB012
M52347FP
V
DD