Specifications

20LC4.2E AA 6.
Block Diagrams, Testpoint Overviews, and Waveforms
Block Diagram Tuner and IF Video
A3
1302
+5VSW
6,7
9
4
51
11
A 3
TUNER +VIF
TV
FM
+VTUN
Sound
Traps
VIF1
VIF2
RF_AGC
SIF2
SIF1
24
25
31
29
30
7011 - IF
A2
A 4
QSS Mixer/
AM Demod.
10
7316
AUDOUTLSR
61
62,63
49,50
34,35
56,57
A5
AUDIO AMPLIFIER
A3
HISTOGRAM
AV3
L
R
SVHS 2
20
18
11
14,16
SIDE AV
C
Y
D
VIDEO
7376-B
7377-B
53,54
TO/FROM
1200 OF
POWER SUPPY
UNIT
HP_LROUT
SVHS_AV2_Y_CVBS_IN
SVHS_C_IN
20
18
14,16
10,12
11 04
1
2
20
21
LR
AUDIO-OUT
1
2
20
21
SCART 2
SCART 1
R-Out
R-In
L-Out
L-In
B-In
Status
G-In
R-In
FBL-In
TER-Out
CVBS-In
1
1
2
2
5
5
6
6
7
7
9
9
10
R-Out
L-Out
R-In
L-In
Status
P50
C-In
MON-Out
Y/CVBS-In
11
11
12
12
10
15
15
16
16
EF
Const_LR_OUT
SC1_LR_RF-OUT
SC2_LR_MON_OUT
STATUS_1
SC2_CVBS_MON_OUT
SC1_COMP_B_U_IN
SC2_LR_IN
SC1_COMP_AV1_LR_IN
SC2_Y_IN
SC1_CVBS_IN
P50_LINE_ITV_IR_SW
SCV1_CVBS_RF_OUT
SC1_FBL_IN
STATUS_2
SC2_C_IN
7119
1301
7371
R
L
R
L
7910
8
3
4
1
1910
3910
A6
TV SUPPLY
A 7
SC1_COMP_R_V_IN
SC1_FBL_IN
SSIF(Tuner FM) 33
A1
SDA
SCL
SEL_IF
SSIF
A2
A2
A2
A2
S
Q
R
OSC
REF
5
1
2
3
4
2931
+5VSW
VCC
6
7
7930
3931
6930
5931
8
? ?
LEFT
RIGHT
1704
4
1
7710
SOUND_ENABLE
EXT_MUTE
7706
1
2
12
13
POWER_DOWN
OUT_MUTE
3732
3
2
3
11
A6
A2
A2
A3
+3V3STBY
14
QSS/FM
AGC
Detect
CVBS1
Input
sw.
INA..D
cvbs/y
c
Output
sw.
CS1A..D
cvbs
+
55
58
51
59
52
64
A1
1328
1330
7
7
8
8
3311
6323
3323
+5VSW
2
3
2
3
7320
4334
2321
4327
4331
4333
Dig. 2H/4H
Combfilter
Y Delay Adj.
PA L/ NTSC/
SECAM
Decoder &
Baseband
Delay
Y
int
Chroma
U
int
V
int
RGB/YP
R
P
B
Insert
YUV Interface
78 79 8077 74 75 76
Pix Improvement
(Histogram)
7560
70
71 72
Peaking
SCAVEM
U/V Delay
YUV IN/OUT
Skin Tone
U/V Tint
Saturation
RGB Matrix
Blue & Black
Stretch
Gamma Corr.
YUV
SAT
SCAVEM
on Text
RGB Matrix
Blue & Black
Stretch
Gamma Corr.
G_OSD
R_OSD
B_OSD
Fast Blanking
CON BRI
85
86
87
H/V
Sync Sep
H-OSC
H-Shift
H-Drive
Vertical & East-
West Geometry
H/V
66
67
HOUT
FB/SC
VDRB
VDRA
23
22
YOUT
UOUT
VOUT
VIN
UIN
YIN
R/Pr-3
INSSW3
G/Y3 B/Pb-3
SC1_COMP_AV1_G_Y_CVBS_IN
SC1_COMP_B_U_IN
EF
7013
EF
7014
EF
7012
RO
GO
BO
R_SDTV
G_SDTV
B_SDTV
SCL
SDA
68
9
16
17
19
1411
20
+8VSW_2
R
L
EF
7138
25,28
43,45
29
37,39
34
SC1_COMP_AV1_G_Y_CVBS_IN
SC1_COMP_R_V_IN
35
30
42
41
18,20
24,27
15
22
32
44
14
16
A 3H1
SC2_C_IN
32
24
SC2_CVBS_MON_OUT
14
SC1_CVBS_IN
30
SC2_Y_IN
38
SVHS_AV2_Y_CVBS_IN
SVHS_C_IN
40
4
11
12
16
cvbs/y
CVBS/Y-X
C-X
CVBS/Y- X
C-X
P50
STATUS_2
STATUS_1
AD Conv
Std Stereo
Decoder
Audio Select
ADC/DAC
Audio
Control
Vol/Treb/
Bass
Features
DACs
I2S Proc
QSS/FM
SC1_COMP_AV1_LR_IN
Const_LR_OUT
SC1_LR_RF-OUT
SC2_LR_IN
SC2_LR_MON_OUT
19,22
26,28
7,9
AM
1,3
18,21
SC1_COMP_AV1_LR_IN
Const_LR_OUT
SC1_LR_RF_OUT
SC2_LR_IN
SC2_LR_MON_OUT
7370
SVHS_LR_IN
AudioIN2LR
60
AUDOUTLSL
36,37
1:1
1:1
7372
7709
MUTE
-
+
VCC
7708
7376-A
7377-A
-
+
ST-BY
4
5
6
9
10
8
STANDBY
3706
37467703-1
3706
HP_DET_R_DC
AUD-SUP
ST_BY
ST_BY
7703-2
3747
HP_DET_IN
HP_LOUT
AUDOUTLSR
AUDOUTLSL
AUD-SUP
2
67
1
7740
+3V3STBY
HP_ROUT
AUD-SUP
5958
+12VSW
+12VUNREG
+3V3STBY
AUD-SUP
6910
+VTUN
6911
5920
+8VSW_TV
2921
7920
13
2
13
11
13
5
SC2_CVBS_RF_OUT
43
SVHS_LR_IN
HP_DET_IN
HP_DET_R_DC
HP_LROUT
SVHS_LR_IN
HP_DET_IN
HP_DET_R_DC
42
43
34,36
44,45
3
4
6
8
10,12
1,2
10,12
HISTORGRAM
A5
A5
A5
VCC
TR
DISC
CTRL
RES
OUT
THR
2028
7018
3021
2062
7016#
VCC
TR
DISC
CTRL
RES
OUT
THR
2021
3057
2042
7015#
VCC
TR
DISC
CTRL
RES
OUT
THR
2045
3025
2034
7017#
2020
H_CS_SDTV
7019
2022
V_SDTV
SANDCASTLE
+5VSW
+5VSW
# = NE555 TIMER
8
2
4
3
5
7
6
8
2
4
3
7
6
8
2
4
3
6
7
5
5
HEAD-
PHONE
3010
A3
HISTOGRAM
3058
SANDCASTLE
1
A2
A2
HERCULES
A13
A13
A13
A13
A13
A12
A14
10051005
1005
17
31
2
9
10
11
12
POWER_DOWN
STANDBY
BU_LIGHT_ADJ1
LAMP_ON-OFF
A2
A7
A2,A7
A7
31
15
+5VSW+5VSW
110 3
A2 A2
7011 - SOUND
A3
A3
A2
SYSTEM 7011
PAL-MULTI/SECAM TDA12021
NTSC TDA12001
CHINA/NTSC-AP TDA12011
HERCULES
7
5
13
2
6,15
12
16
19
14
COMPAIR
1303
1
2
3
Y_NOTCH
A7
REAR IO SCART
5560
2561
7562
13
2
+12VSW
F306
F305
F903
F958
F915
F912
F906
F905
F913
F705
F702
F701
F706
F707
F708
I341
E_14490_018.eps
040804
ERR
10
ERR
15