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Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.3.2
Block Diagram
TUNER - 7201
(to HIP on LSP)
CVBS-PIP_TUN1-2-CVBS-IN
CVBS_TER_OUT
7402-B
2
1
SEL_TUNER1
10
12
7402-A
13
11
7401-C
5
CVBS-SC1_AV1-IN
3
Y-CVBS-SC2-AV2-IN
9
SEL-MAIN-R1R2
Y-CVBS-FRONT-IN
7401-A
12
C-SC2_SVHS-IN
13
C-FRONT-IN
3
SDA
7403
IO
2
SCL
EXPANDER
9.3.3
IF and Video section
Basically the "IF and video" processing part is quite similar to
the circuits used on the main board, except that it has a multi
standard PIP processor. The processing in the DW module is
performed by the TDA8887H BOCMA IC (in the set by the HIP
IC).
One tuner versions
In order to display the external AV sources by the DW panel, a
source selection circuit is incorporated on the panel. Three
1352
4
11
1
5
1
2
PIP-AUDIO
8
IF
16
AP & LATAM
15
+
1333
14
24
SEL_TUNER2
29
7401-B
2
15
4
1
26
10
14
11
SEL-FRNT-RR
4
SEL-MAIN-R1R2
5
SEL-FRNT-RR
6
SEL_TUNER1
7
SEL_TUNER2
9
FBLK
10
N.A.
11
N.A.
12
N.A.
Figure 9-2 Double Window circuitry
70
94
DOUBLE WINDOW PROCESSOR
IC7801
SAB9081H
72
87
49
56
TDA8887H
IC7301
(=BOCMA)
+
20
54
60
7402-C
5
4
3
SEL_PIP_CVBS
external AV sources are possible. The selection between the
sources is performed by IC7401 (HEF4053).
Two tuner versions
The TV uses one RF input to the DWs tuner via a splitter. The
tuner on the main board receives RF from the splitter. Due to
this configuration, the main board tuner always processes the
Main picture while the DW tuner always processes the Sub
picture. If the picture between the two tuners needs to be
swapped, then the tuners' RF frequencies are swapped.
EM5.1E
0205
4 3 1
2 100
98
4
3
2
6
8
DY
7
12
DU
8
10
DV
7803
68
81
79
83
RGB
SYNC
OUTPUT
RGB/YUV
MATRIX
RGB
INPUT1
COLOUR
DECODING
RBG/YUV
RGB/
MATRIX
YUV
INPUT2
YUV INTERFACE
41
42
43
40 45 46
(AVI)
14
SDA
7
7501
V-CHIP
15
SCL
CL 16532043_017.eps
9.
EN 115
6 8 9
10
12
11
10
TDA8601
190601
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