Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 115EM5.1E 9.
9.3.2 Block Diagram
Figure 9-2 Double Window circuitry
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
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.
TUNER - 7201
1352
4
5
1
11
IF
+ +
RGB/
YUV
INPUT2
RGB/YUV
MATRIX
COLOUR
DECODING
SYNC
RBG/YUV
MATRIX
YUV INTERFACE
RGB
INPUT1
RGB
OUTPUT
DOUBLE WINDOW PROCESSOR
IC7801
SAB9081H
TDA8887H
IC7301
(=BOCMA)
7803
TDA8601
1333
4305
PIP-AUDIO
PIP-AUDIO
12
11
10
6
7
8
8
12
10
10
68
9
234
43 1
0205
Y-MAIN-OUT
U-MAIN-OUT
V-MAIN-OUT
Y-PIP+MAIN-IN
U-PIP+MAIN-IN
V-PIP+MAIN-IN
98
2
100
40 45 46
8379
81
5649
8772
SVSYNC
SHSYNC
DVSYNC
DHSYNC
9470
1
2
8
16
CVBS-PIP_TUN1-2-CVBS-IN
AP & LATAM
24
29
20
CVBS-SC1_AV1-IN
SEL_TUNER1
SEL_TUNER2
7402-B
7402-A
CVBS_TER_OUT
(to HIP on LSP)
Y-CVBS-FRONT-IN
Y-CVBS-SC2-AV2-IN
C-SC2_SVHS-IN
C-FRONT-IN
SEL-MAIN-R1R2
SEL-FRNT-RR
2
1
15
10
12
13
11
14
7401-C
7401-B
7401-A
12
13
14
11
5
3
4
2
1
15
10
9
41 42 43
R-SC1-IN_V-IN
G-SC1-IN_Y-IN
B-SC1-IN_U-IN
7402-C
4
5
3
7501
V-CHIP
SDA
(AVI)
SCL
14
15
7
SEL_PIP_CVBS
54
7403
IO
EXPANDER
4
5
6
7
9
10
11
12
3
2
SEL-MAIN-R1R2
SEL-FRNT-RR
SEL_TUNER1
SEL_TUNER2
FBLK
N.A.
N.A.
N.A.
26 60
SDA
SCL
68
MY
MU
MV
SV
SU
SY
DV
DY
DU
CL 16532043_017.eps
190601
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