Emerson EWL2005 Schematic
SERVICE MANUAL
20″ COLOR LCD TELEVISION
EWL2005
[1] Rear Cabinet
[9] Front Cabinet
S-1
S-2
S-1
S-1
S-1
S-2
S-1
Fig. D1
[8] Speaker
S-7
S-4
S-8
S-9
S-10
[6] Function CBA
[7] IR Sensor CBA
[8] Speaker
S-10
S-7
S-8
S-7
[2] Jack Holder
[5] LCD Main CBA & Liquid Crystal Panel Unit
S-3
S-3
S-3
S-7
S-7
S-6
S-6
S-6
S-6
[4] Main CBA
[3] Inverter CBA
S-6
S-5
S-5
Fig. D2
4-2 L3202DC
TV Cable Wiring Diagram
To Liquid Crystal Panel
LCD Main
CBA Unit
Function CBA
CLN104
CN104
CN113
CN311
CN103B
CN103A
CN312
CN102B
CN105
CN111
CN112
CN101B
CLN105
Main CBA
IR Sensor CBA
CN460
Inverter CBA
CN101ACN102A
CN411
CN802CN801
CLN411
CN490 CN450
To Speaker
To Liquid Crystal Panel
To Speaker
Fig. D3
4-3 L3202DC
BLOCK DIAGRAMS
System Control Block Diagram
POWER
D102
AL +5V
Q102
SENSOR
REMOTE
RCV102
IR SENSOR CBA
CLN105
P-ON-H44
REMOTE33
CN105
KEY SWITCH
KEY SWITCH
CLN104
KEY-IN-122
KEY-IN-211
CN104
TO LCD BACKLIGHT
BLOCK DIAGRAM
CN113 IS USED
FOR ADJUSTMENT
P-ON-H
BACKLIGHT-SW
BACKLIGHT-ADJ
FUNCTION CBA
CLN411
BACKLIGHT-ADJ
BACKLIGHT-SW
P-ON-H11 11
99
88
CN411
TO POWER SUPPLY
INVERTER CBA
BLOCK DIAGRAM
P-ON-H
TO IF/VIDEO
BLOCK DIAGRAM
SCL
SDA
S-SW
INPUT-0
AFT-IN
INPUT-1
FSC
P-ON-H
VOLUME
TO AUDIO
BLOCK DIAGRAM
SDA
SCL
AUDIO-MUTE
AT FACTORY
SDA2SCL1BUS-OPEN
4
CN113 (NO CONNECTION)
IC333 (TV MICRO CONTROLLER)
4
KEY-IN-2
3
KEY-IN-1
MAIN CBALCD MAIN CBA UNIT
BUS-OPEN519
BACKLIGHT-SW
BACKLIGHT-ADJ
P-ON-H16 8
INPUT-012 12
INPUT-111 13
P-ON-H2(NU)
19 5
21 3
14 1016
CN102B CN102A
TO POWER
SUPPLY
BLOCK
P-25V-ON
12
P-25V-ON
DIAGRAM
221817
23
BUS-OPEN
BACKLIGHT-SW
BACKLIGHT-ADJ
P-ON-H
P-ON-H2
3140193241
INPUT-0
INPUT-1
P-ON+3.3V(D)
X161
27MHz
RESET
Q151
11
REMOTE
21
RESET
42
XIN
43
XOUT
S-SW717
SCL618
SDA519
AFT-IN10 145AFT-IN
SCL
SDA
S-SW
VOLUME15 9
AUDIO-MUTE
13 11
20
35
VOLUME
AUDIO-MUTE
Q301
Q131
80
TUNERCLK
IC171
(MEMORY)
BUFFER
3.3V<-->5V
CONVERTER
7
6
5
WP
SCL
SDA
FSC123
CN103B CN103A
CN112(NO CONNECTION)
SDA 2
SCL 1
BUS-OPEN 4
NO PART
MOUNTED
FOR CN112
7-1
L3202BLS
IF/Video Block Diagram
TO
CVBS11
CN103A
LCD BLOCK
DIAGRAM
CN103B
S-VIDEO-C7
S-VIDEO-Y9
WF8
TO
VIDEO-Y5
CN103A
LCD BLOCK
DIAGRAM
CN103B
VIDEO-Pb/Cb
VIDEO-Pr/Cr
3
1
AUDIO SIGNAL
MAIN CBA
VIDEO SIGNAL
TO AUDIO BLOCK
DIAGRAM
SIF
8
SIF
AMP
7
4.5MHz
FILTER
CF31
4
SIF
TRAP
IF AGC DET
WF7
Q703
3
BUFFER
BUFFER
4
5
WF9
Q702
13
BUFFER
14
12
Q701
1
BUFFER
15
2
SW
TO AUDIO
BLOCK DIAGRAM
INPUT-0(INV)
INPUT-1(INV)
11
10
CONTROL
9
Q707
Q708
INPUT-0
INPUT-1
TO SYSTEM CONTROL
BLOCK DIAGRAM
TO SYSTEM CONTROL
BLOCK DIAGRAM
AFT-IN
13
18
IC781 (INPUT SELECT)
Q32
EQ
AMP
1
2
DEFEAT
VIDEO
VIF
IC31 (IF SIGNAL PROCESS)
16
SAW
FILTER
SF11
IF
TU1
(TUNER UNIT)
DET
AMP
17
VCO
RF
AGC
14
5
173
AGC
XTAL-IN
2
SCL
AFT
SDA
AMP
11
SDA
TO
SCL
FSC
SYSTEM
CONTROL
WF10
WF11
WF12
S-SW
BLOCK
DIAGRAM
JK703
VIDEO1
BUFFER
Q704
Q705
CY
-IN
JK701
S-VIDEO
IN
JK706
VIDEO-YINJK707
BUFFER
Q706
VIDEO-Pb/CbINJK708
BUFFER
VIDEO-Pr/Cr
IN
7- 2 L3202BLIF
Audio Block Diagram
AUDIO SIGNAL
30
L-CH
OFFSET
CANCEL
75uS
DE-EMPH
MATRIX AGC
29
R-CH
OFFSET
CANCEL
WIDE BAND
EXPAND
WIDE BAND
RMS DET
WIDE BAND
FILTER
(L-R)/SAP
SW
SPECTRAL
EXPAND
dBX
DE-EMPH
SPECTRAL
RMS DET
SPECTRAL
FILTER
SP802
SPEAKER
L-CH
CLN802
SP-L 1
CN802
SP801
SPEAKER
R-CH
JK801
HEADPHONE
JACK
GND 2
WF6
VOLUME
/STANDBY
CONTROL
14
RF
AMP
11
AMP
MUTE
CLN801
GND 2
SP-R 1
CN801
TO IF/VIDEO
SCL
BLOCK DIAGRAM
SDA
INPUT-0(INV)
INPUT-1(INV)
TO SYSTEM
CONTROL BLOCK
VOLUME
P-ON-H
AUDIO-MUTE
Q803
5
7
2
Q802
+5V
IC851 (MTS/SAP AUDIO SIGNAL PROCESS)
L+R
FILTER
OFFSET
STEREO
FILTER
SIF/BB
SW
INPUT
VCA
SIF
DEMOD
21
SIF
L-R
FILTER
CANCEL
SAP OUT
FILTER
SAP
DEMOD
SAP
FILTER
I2C
DECORDER
27
24
IC801 (AUDIO AMP)
13
TUNER
AUDIO2
AUDIO1
IC852 (INPUT SELECT)
111512
14
(L-CH)
6
(L-CH)
(R-CH)
(R-CH)
TUNER
AUDIO1
4
2
1
3
AUDIO2
1
9 10
SW CTL
5
MAIN CBA
TO
IF/VIDEO BLOCK
DIAGRAM
7-3
AUDIO1(L)
JK704
-IN
JK705
AUDIO1(R)
-IN
JK709
AUDIO2(L)
-IN
JK710
AUDIO2(R)
-IN
L3202BLA
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