ESPEC LCD-A1504 User manual
15″/20″COLOR LCD TELEVISION
LCD-A1504
LCD-A2004
The LCD panel is manufactured to provide many years of useful life.
Occasionally a few non active pixels may appear as a tiny spec of color.
This is not to be considered a defect in the LCD screen.
1-1 L4100SP
SPECIFICATIONS
<TUNER> ANT. Input------------------- 80 dBµV, Video: PAL 87.5%, Audio: 30 kHz dev (1 kHz Sin)
Test Input Signal-----------400Hz 30% modulation
<LCD PANEL>
<VIDEO>
<AUDIO> All items are measured across 8Ωload at speaker output terminal with L.P.F.
Note:
Nominal specifications represent the design specifications. All units should be able to approximate these. Some
will exceed and some may drop slightly below these specifications. Limit specifications represent the absolute
worst condition that still might be considered acceptable. In no case should a unit fail to meet limit specifications.
Description Condition Unit Nominal Limit
1. Intermediate Freq. Picture
Sound MHz
MHz 45.75
41.25 -
-
2. Color Killer Sens. CH-3 dBµV 20 23
3. AFT Pull In Range
(10mV input) – MHz ±1.6 ±0.7
Description Condition Unit Nominal Limit
1. Number of Pixels Horizontal
Vertical pixels
pixels 640 x 3
480 -
-
2. Brightness cd/m2450 -
3. Response Time - msec 16 -
4. Support Color - - 16mil.(8bit) -
5. Viewing Angle Horizontal
Vertical °
°-85 to 85
-85 to 70 -
Description Condition Unit Nominal Limit
1. Over Scan Horizontal
Vertical %
%8.5
6.5 10±5
10±5
2. Color Temperature -
x
y
°K 8500
0.29
0.30
-
0.29±0.03
0.30±0.03
3. Resolution Horizontal
Vertical line
line 400
350 <250
<300
Description Condition Unit Nominal Limit
1. Audio Output Power 10% THD: Lch/Rch W 1.0/1.0 0.8/0.8
2. Audio Distortion 500mW: Lch/Rch % 1.0/1.0 <3
3. Audio Freq. Response
-
6dB: Lch
-
6dB: Rch Hz
Hz 50 to 12K
50 to 12K -
-
4. Audio S/N RF
VIDEO 1
VIDEO 2
dB
dB
dB
60
60
60
45
45
45
4-3 L4100DC
Wiring Diagram
Fig. D3
T402 CN101A CN102A
CN31A
CN31B
CN801 CN802
To Speaker
To LCD Module
Assembly
To LCD Module Assembly
Function CBA
Main CBA
LCD Main CBA
To Speaker
CN103A
CN101B
CN320A CN321A
CN102B CN103B
T401
4-6 L4200DC
Cable Wiring Diagram
Fig. D3
T1402 CN101A CN102A
CN53
CN405
CN1401
CN51
CN51A
CN801 CN802
To Speaker
To LCD Module Assembly
Function CBAIR Sensor CBA
Inverter CBA Main CBA
LCD Main CBA
To Speaker
CN103A
CN101B
CN310A CN311A CN313A
CN102B CN103B
T1401
T1404
To LCD
Module
Assembly
To LCD
Module
Assembly
T1403
5-1 L4100INT
HOW TO INITIALIZE THE LCD TELEVISION
To put the program back at the factory-default,
initialize the LCD television as the following procedure.
How to initialize the LCD television:
1. Turn the power on. (Use main power on the TV
unit.)
2. To enter the service mode, press [STANDBY], [2],
[7], [1], and [MUTE] buttons on the remote control
unit in that order within 5 seconds.
- To cancel the service mode, press [STANDBY]
button on the remote control.
3. To initialize the LCD television, press “DISPLAY”
button on the remote control unit.
4. Confirm "FF" indication on the upper right of the
screen.
6-1 L4100EA
ELECTRICAL ADJUSTMENT INSTRUCTIONS
General Note:
“CBA” is abbreviation for “Circuit Board Assem-
bly.”
NOTE:
Electrical adjustments are required after replacing
circuitcomponentsandcertainmechanicalparts.Itis
importantto performthese adjustments only after all
repairs and replacements have been completed.
Also, do not attempt these adjustments unless the
proper equipment is available.
Test Equipment Required
1. DC Voltmeter
2. Pattern Generator
3. Color Analyzer
How to Set up the Service mode:
1. Turn the power on. (Use main power on the TV
unit.)
2. Press [STANDBY], [2], [7], [1], and [MUTE] buttons
on the remote control unit in that order within 5
seconds.
- To cancel the service mode, press [STANDBY]
button on the remote control.
1. Initial Setting
General
Enter the Service mode.
Set the each initial data as shown on table 1 below.
Table 1: Initial Data
ITEM BUTTON
(on the remote
control)
DATA VALUE
LCD-
A1504 LCD-
A2004
BRT(PAL)
MENU →1
130 134
CNT(PAL) 174 174
CLR-R(PAL) 78 74
CLR-B(PAL) 78 74
SHR(PAL) 143 143
S-BRT(PAL)
MENU →2
130 134
S-CNT(PAL) 174 174
S-CLR-R(PAL) 78 74
S-CLR-B(PAL) 78 74
S-SHR(PAL) 143 143
C-BRT(PAL)
MENU →3
134 134
C-CNT(PAL) 122 132
C-CLR-R(PAL) 156 154
C-CLR-B(PAL) 156 154
C-SHR(PAL) 143 143
BRT(SECAM)
MENU →4
130 134
CNT(SECAM) 174 174
CLR-R(SECAM) 78 74
CLR-B(SECAM) 78 74
SHR(SECAM) 143 143
S-BRT(SECAM)
MENU →5
130 134
S-CNT(SECAM) 174 174
S-CLR-R(SECAM) 78 74
S-CLR-B(SECAM) 78 74
S-SHR(SECAM) 143 143
C-BRT(SECAM)
MENU →6
134 134
C-CNT(SECAM) 122 132
C-CLR-R(SECAM) 156 154
C-CLR-B(SECAM) 156 154
C-SHR(SECAM) 143 143
BRT(NTSC)
MENU →7
134 134
CNT(NTSC) 172 174
CLR-R(NTSC) 78 70
CLR-B(NTSC) 78 70
TNT(NTSC) 148 148
SHR(NTSC) 143 143
S-BRT(NTSC)
MENU →8
134 134
S-CNT(NTSC) 172 174
S-CLR-R(NTSC) 78 70
S-CLR-B(NTSC) 78 70
S-TNT(NTSC) 148 148
S-SHR(NTSC) 143 143
6-2 L4100EA
2. +B Adjustment
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Note: TP401(+B), TP300(GND), VR649 --- Main CBA
1. Connect DC Volt Meter to TP401 and
TP300(GND).
2. Adjust VR649 so that the voltage of TP401
becomes +13.0±0.3V DC [LCD-A1504] or
+21.0±0.3V DC [LCD-A2004].
3. Flicker Adjustment
Adjustment Point: R977 (LCD Main CBA)
1. Enter the Service mode.
2. Press “2” button on the remote control unit.
The following screen appears.
3. If Flicker Adjustment is not fit, the screen become
the following.
4. Adjust R977 so that flash stops.
C-BRT(NTSC)
MENU →9
134 134
C-CNT(NTSC) 122 132
C-CLR-R(NTSC) 156 154
C-CLR-B(NTSC) 156 154
C-TNT(NTSC) 148 148
C-SHR(NTSC) 143 143
BRIGHT 0 0 0
NORMAL 0 40 65
DARK 0 95 98
COR(C/D/S-1) VOL. p→1 131 131
COG(C/D/S-1) VOL. p→2 131 131
COB(C/D/S-1) VOL. p→3 131 131
DR(C/D/S-1) VOL. p→4 145 145
DG(C/D/S-1) VOL. p→5 143 143
DB(C/D/S-1) VOL. p→6 140 140
SBR(C/D/S-1) VOL. p→70 0
SBB(C/D/S-1) VOL. p→90 0
C-COR(C/D/S-2) VOL. p→1 131 131
C-COG(C/D/S-2) VOL. p→2 131 131
C-COB(C/D/S-2) VOL. p→3 131 131
C-DR(C/D/S-2) VOL. p→4 145 145
C-DG(C/D/S-2) VOL. p→5 143 143
C-DB(C/D/S-2) VOL. p→6 140 140
C-SBR(C/D/S-2) VOL. p→70 0
C-SBB(C/D/S-2) VOL. p→90 0
7F
VOL. p
FF FF
LAST POWER OFF OFF
SYSTEM
PAL-BG PAL-BG
NCM ON ON
ASPECT OFF OFF
RUSSIAN OFF OFF
Test Point Adj. Point
TP401 (+B)
TP300 (GND) VR649
M. EQ. Spec.
DC Voltmeter +13.0±0.3V DC [LCD-A1504]
+21.0±0.3V DC [LCD-A2004]
ITEM BUTTON
(on the remote
control)
DATA VALUE
LCD-
A1504 LCD-
A2004
R977
LCD Main CBA
FLASH
(Go and Off)
6-3 L4100EA
The following adjustment normally are not
attempted in the field. Only when replacing the
LCD Panel then adjust as a preparation.
4. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Purity (APL 80% or APL 40%).
3. Set the color analyzer to the CHROMA mode and
bring the optical receptor to the center on the
LCD-Panel surface after zero point calibration as
shown above.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
4. [RF/AV2(CVBS)]
Enter the Service mode. Press “VOL p” button on
the remote control unit and select “C/D/S-1” mode.
[AV1(RGB)]
Enter the Service mode. Press “VOL p” button on
the remote control unit and select “C/D/S-2” mode.
5. [RF/AV2(CVBS)]
When “x” value and “y” value are not within
specification, adjust “DB (C/D/S-1)” or “DR (C/D/S-
1)”. Refer to “1. Initial Setting.”
Note: “DB(C/D/S1)” or “DR(C/D/S1)” must be
adjusted within ±10.
[AV1(RGB)]
When “x” value and “y” value are not within
specification, adjust “C-DB(C/D/S-2)” or “C-DR(C/
D/S-2)”. Refer to “1. Initial Setting.”
Note: “C-DB(C/D/S-2)” or “C-DR(C/D/S-2)” must
be adjusted within ±10.
6. Turn the power off and on again. (Main power
button on the TV unit.)
Test Point Adj. Point Mode Input
Screen VOL. p
buttons
[RF/AV2(CVBS)]
C/D/S-1
[AV1(RGB)]
C/D/S-2
WhitePurity
(APL 80%)
or
(APL 40%)
M. EQ. Spec.
Pattern Generator,
Color analyzer x: 260 to 320,
y: 270 to 330
Figure
Color Analyzer
It carries out in a darkroom.
L = 50 cm
Perpendicularity
INPUT: WHITE 80%
7-1
System Control Block Diagram
L4100BLS
BLOCK DIAGRAMS
KEY-IN-144
CN31B
KEY-IN-233
RCV30
REMOTE
SENSOR
CN31A
FUNCTION CBA
KEY-IN-144
CN51A
KEY-IN-233
IR SENSOR CBA
CLN53 RCV51
D51
RCV-IN33 REMOTE
SENSOR
IC151
(MICRO CONPUTER)
93
10
52
89
59
22
KEY-IN-144
CN103B CN103A
RCV-IN11
BACKLIGHT-SW
33
BACKLIGHT-ADJ
22
P-ON-H66
PROTECT-113 13
PROTECT-214 14
VOLUME77
A-MUTE(NU)
88
INPUT-099
INPUT-110 10
S-SW15 15
SCL18 18
SDA19 19
16
KEY-IN-1
RCV-IN
RESET
P-ON-H
PROTECT-1
PROTECT-2
VOLUME
SDA
SCL
INPUT-0
INPUT-1
S-SW
SCL
SDA
88
24
77
46
27
78
45
28
13
11
X151
10MHz
XIN
XOUT
TO POWER SUPPLY
BLOCK DIAGRAM
TO AUDIO
BLOCK DIAGRAM
BACKLIGHT-SW
BACKLIGHT-ADJ
P-ON-H
PROTECT-1
PROTECT-2
VOLUME
A-MUTE
INPUT-0
INPUT-1
S-SW
SCL
SDA
MAIN CBALCD MAIN CBA UNIT
92
KEY-IN-255
KEY-IN-2
CN51
CN53
RESET
IC153
4
AL+5V
CN102B CN102A
EEP-SDA 2
EEP-SCL 1
BUS-OPEN 4
CN105(NO CONNECTION)
IC152
(MEMORY)
SCL 6
SDA 5
7
WP
26BUS-OPEN(NU)
AL+5V
AL+5V
CN105 IS
USED FOR
ADJUSTMENT
AT FACTORY
SCLK 3
BUSY 2
RXD 4
CN104(NO CONNECTION)
EPM(NU) 6
CE(NU) 5
CNVSS 9
RESET 8
TXD 10
DVP-SOUT
DVP-CS
DVP-SIN
MPSEL-0
DVP-CLK
DVP-RESET-PC
QH
FBIN
BUS-OPEN 2
DVP-RESET-PC
8
DVP-CLK-PC
5
CN301(NO CONNECTION)
DVP-SOUT-PC
6
DVP-SIN-PC
7
DVP-CS-PC
4
MPSEL-0 3
Q156
3.3V<-->5V
CONVERTER
Q155
3.3V<-->5V
CONVERTER
Q152
3.3V<-->5V
CONVERTER
Q154
3.3V<-->5V
CONVERTER
Q153
3.3V<-->5V
CONVERTER
REG+3.3V
2
5
19
2DVP-SOUT
2DVP-CS
2DVP-CLK
42DVP-SIN
3
79
H-SYNK
2DVP-RESET
30
39
31
44
32
91
90
7
56
29
AFT-IN11 11
P-ON-H222 22
AFT-IN
P-ON-H2
PROTECT-3 PROTECT-316 16
BUS-OPEN(NU)
20 20
23 SLOW-SW19 19
SP-MUTE20 20
FBIN25 25
1
SLOW-SW-IN
SP-MUTE 84INSEL-MUTE
87 RAPID-SW18 18
RAPID-SW-IN
20
83
85
25
58
INSEL-MUTE
17 17
P-ON-L(NU)24 24
RGB-CONTROL(NU)
26 26
P-25V-ON23 23
NICAM-RESET
22 22
P-ON-L(NU)
RGB-CONTROL(NU)
P-25V-ON
SC-VIDEO-MUTE
NICAM-RESET
S/C-JACK-MUTE
16 16
33
34 EEP-SCL
EEP-SDA S/C-JACK-MUTE
PROTECT-3
P-ON-H2
SP-MUTE
INSEL-MUTE
NICAM-RESET
FBIN
RAPID-SW
SLOW-SW
S/C-JACK-MUTE
TO IF/VIDEO
BLOCK DIAGRAM
AFT-IN
BUSY-FLASH
SCLK-FLASH
RXD-FLASH
CE-FLASH(NU)
EPM-FLASH(NU)
CNVSS
TXD-FLASH
IC301
(LCD DRIVE /
SIGNAL PROCESS)
58
50
60
57
59
83
89
7
RCV-IN77
KEY SWITCH
KEY SWITCH
KEY SWITCH
KEY SWITCH
P-25V-ON
5
AL+5V
INVERTER CBA
CN1401
BACKLIGHT-SW
10 10
BACKLIGHT-ADJ
11 11
CN405
PROTECT-112 12
P-ON-H13 13
TO LCD BACKLIGHT
BLOCK DIAGRAM (B)
B
A
FUNCTION CBA
BACKLIGHT-ADJ
BACKLIGHT-SW
PROTECT-1 TO LCD BACKLIGHT
BLOCK DIAGRAM (A)
BACKLIGHT-SW
BACKLIGHT-ADJ
PROTECT-1
P-ON-H
A
Comparison Chart of
Models & Marks
Model Mark
LCD-A1504
LCD-A2004 A
B
D30
STAND BY
STAND BY
7-2
IF/Video Block Diagram
L4100BLIF
JK751
15
11
7
VIDEO-Pb
VIDEO-Y
VIDEO-Pr
TO
AUDIO
BLOCK DIAGRAM
CN103A
INPUT-0(INV)
INPUT-1(INV)
TU1
SIF
SDA
SCL
7
10
9
SIF
MAIN CBA
VIDEO SIGNAL AUDIO SIGNAL
TO AUDIO BLOCK
DIAGRAM
Q734
JK722
VIDEO1
-IN
JK721
S-VIDEO
-IN
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
CY
TO
LCD BLOCK
DIAGRAM (A),(B)
CN103B
IC781 (INPUT SELECT)
Q754
Q702
Q701 SW
CONTROL
10
911
INPUT-0
INPUT-1
TO
SYSTEM CONTROL
BLOCK DIAGRAM
Q872
Q871
Q753
Q752
Q751
(TUNER UNIT)
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
WF7
WF2
WF3
WF6
WF5
WF4
3
54
CVBS18
S-VIDEO-C5 S-VIDEO-Y6
VIDEO-Pr1 VIDEO-Y2 VIDEO-Pb3
CVBS29
8
19
20
VIDEO-IN
VIDEO-OUT
SLOW-SW
17
16
16RAPID-SW
AFT
VIDEO
Q781
BUFFER
WF8
SDA
SCL
S-SW
6
AUDIO
AUDIO
AFT-IN
S/C-JACK-MUTE
FBIN
Q11
SLOW-SW
Q731
RAPID-SW
Q730
Q791
Q744
Q792
AL+5V
Q743
BUFFER
7-3
Audio Block Diagram
L4100BLA
MAIN CBA
AUDIO SIGNAL
VOLUME
TO SYSTEM
CONTROL
BLOCK
INPUT-0(INV)
INPUT-1(INV)
SCL
SDA
IC871 (INPUT SELECT)
SW CTL
3
11
15
12
4
1
9 10
dBX/MNR
PANDA1 FM/AM
PRESCALE
I2C READ
REGISTER
AUTOMATIC
SOUND
SELECT
NICAM
PRESCALE
L-CH
R-CH
VOLUME
AGC DEMODULATOR
A/D
CONVERTER
I2C
DECORDER
TO IF/VIDEO
BLOCK
DIAGRAM
TUNER
AUDIO1
AUDIO2
TUNER
AUDIO1
AUDIO2
(L-CH)
(R-CH)
2
12
13
IC831 (SOUND PROCESSOR)
AUDIO1(L)
-IN
JK723
SIF
JK724
AUDIO1(R)
-IN
14
IC801(AUDIO AMP)
7
VOLUME
11
AMP
AMP
MUTE
/STANDBY
CONTROL
6
1
(R-CH)
(L-CH)
2 5
RF
JK801
HEADPHONE
JACK
CN801
SP-R 1
GND 2
SP802
SPEAKER
L-CH
CN802
SP-L 1
GND 2
TO IF/VIDEO
BLOCK
DIAGRAM
13
2
WF1
CLN802
CLN801
SP801
SPEAKER
R-CH
TO SYSTEM
CONTROL
BLOCK
DIAGRAM NICAM-RESET
43
22
AUDIO
RESET
6
INH
JK751
1
3
AUDIO2(L)
-OUT
AUDIO2(R)
-OUT
6
AUDIO2(L)
-IN
2
AUDIO2(R)
-IN
Q732 Q733
Q741
Q742 AL+5V
INSEL-MUTE
S/C-JACK-MUTE
SP-MUTE
DEEMPHASIS
SOUND
SELECT
A/D
CONVERTER
SCART DSP
INPUT SELECT SCART
PRESCALE
D/A
CONVERTER VOLUME
SCART1 OUTPUT SELECT SCART1
CHANNEL
MATRIX
QUASI-PEAK
CHANNEL MATRIX
I2C READ
REGISTER
30
31
QUASI-PEAK
DETECTOR
LOUD SPEAKER
CHANNEL MATRIX
AVC
D/A
CONVERTER
STANDERD
AND SOUND
DETECTION
7-4 L4100BLLCD
LCD Block Diagram ( A )
LCD MAIN CBA UNIT
VIDEO SIGNAL
IC301 (LCD DRIVE / SIGNAL PROCESS)
TO
IF/VIDEO
BLOCK
DIAGRAM
CN103A
CN103B
182
181
180
179
175
174
173
ODDINV
EVENINV
STH1
POL
STV1
CLKV
CLKH1
LCD MODULE
VREF(4) 25
VREF(0) 29
VREF(1) 28
VREF(2) 27
VREF(3) 26
VREF(7) 21
VREF(5) 23
VREF(6) 22
VREF(8) 20
VREF(9) 19
104
105
103
VCOM 35
VCOM 36
PANEL+10.8V
R977
VCOM
CN320A
169
168
167
166
165
161
160
159
158
155
154
153
152
151
150
146
145
LCD MODULE
TP322
TP323
TP318
TP319
TP320
TP321
143
142
141
140
139
135
134
133
132
131
130
129
128
127
123
122
121
120
119
116
115
114
113
106
TP316
TP317
TP312
TP313
TP314
TP315
CN321A
OR(3)
32 OR(4)
31 OR(5)
30
OR(0)
35 OR(1)
34 OR(2)
33
OG(3)
25 OG(4)
24 OG(5)
23
OR(0)
28 OG(1)
27 OG(2)
26
OB(3)
18 OB(4)
17 OB(5)
16
OB(0)
21 OB(1)
20 OB(2)
19
ER(3)
5ER(4)
4ER(5)
3
ER(0)
8ER(1)
7ER(2)
6
EG(3)
47 EG(4)
46 EG(5)
45
EG(0)
50 EG(1)
49 EG(2)
48
EB(3)
40 EB(4)
39 EB(5)
38
EB(0)
43 EB(1)
42 EB(2)
41
CVBS1 8
CVBS2 9
S-VIDEO-C 5
S-VIDEO-Y 6
VIDEO-Pb 3
VIDEO-Pr 1
VIDEO-Y 2
VCOM 3
VCOM 4
CN321A
84 85
X301
54MHz
XIN XOUT
CLEAR 15
CLKV 14 VCOM
CONTROL
Q971
IC981,
CLEAR
91
95
96
98
STV1 13
LP 44
CN320A
POL 43
HMS1-E 10
CLKH 12
STH1 42
HMS1-O 14
WF11
WF10 WF12
WF9
VIDEO
SIGNAL
PROCESS
NTSC/PAL
SEPARATION
BURST
LOCKED
OUTPUT
CONTROL
CHROMA
DECODER
SECAM PDM
RCO
PANEL
SIGNAL
PROCESS
TV
SIGNAL
PROCESS
INPUT
CONTROL
CVBS
Y
C
B
G
R
A/D
A/D
A/D
A/D
33
44
13
42
40
21
31
LP
97
187
WF14WF13
Comparison Chart of
Models & Marks
Model Mark
LCD-A1504
LCD-A2004 A
B
B
G
R
B
G
R
R905
R907
R901 R904
R902
R997
7-5
LCD Block Diagram ( B )
L4200BLLCD
CN310A
LCD MAIN CBA UNIT
VIDEO SIGNAL
IC301 (LCD DRIVE / SIGNAL PROCESS)
TO
IF/VIDEO
BLOCK
DIAGRAM
CN103A
CN103B
182
181
180
179
175
174
173
CN311A
ODDINV
EVENINV
STH1
POL
LP
CLKH1
LCD MODULE
VREF(4) 10
VREF(0) 14
VREF(1) 13
VREF(2) 12
VREF(3) 11
VREF(7) 6
VREF(5) 8
VREF(6) 7
VREF(8) 5
VREF(9) 4
104
105
OR(0)29 OR(1)28 OR(2)27 OR(3)26 OR(4)25 OR(5)24 OG(0)22 OG(1)21 OG(2)20 OG(3)19 OG(4)18 OG(5)17 OB(0)15 OB(1)14 OB(2)13 OB(3)12 OB(4)11 OB(5)10
ER(0)39 ER(1)38 ER(2)37 ER(3)36 ER(4)35 ER(5)34 EG(0)32 EG(1)31 EG(2)30 EG(3)29 EG(4)28 EG(5)27 EB(0)25 EB(1)24 EB(2)23 EB(3)22 EB(4)21 EB(5)20
169
168
167
166
165
161
160
159
158
155
154
153
152
151
150
146
145
LCD MODULE
TP322
TP323
TP318
TP319
TP320
TP321
143
142
141
140
139
135
134
133
132
131
130
129
128
127
123
122
121
120
119
116
115
114
113
106
TP316
TP317
TP312
TP313
TP314
TP315
CVBS1 8
CVBS2 9
S-VIDEO-C 5
S-VIDEO-Y 6
VIDEO-Pb 3
VIDEO-Pr 1
VIDEO-Y 2
VCOM 17
VCOM 18
97
95
96
STV1
CLKV
103
CN311A
CN313A
STV1 14
CLKV 16
VCOM 1
VCOM 2
98
EVENINV 2
ODDINV 8
CLKH 5
CN310A
STH1 37
POL 38
LP 39
WF14
WF13
WF11
WF10 WF12WF9
PANEL+10.8V
R977
VCOM
VCOM
CONTROL
Q971
IC981,
VIDEO
SIGNAL
PROCESS
NTSC/PAL
SEPARATION
BURST
LOCKED
OUTPUT
CONTROL
CHROMA
DECODER
SECAM PDM
RCO
PANEL
SIGNAL
PROCESS
TV
SIGNAL
PROCESS
INPUT
CONTROL
CVBS
Y
C
B
G
R
A/D
A/D
A/D
A/D
84 85
X301
54MHz
XIN XOUT
33
44
13
42
40
21
31
91
Comparison Chart of
Models & Marks
Model Mark
LCD-A1504
LCD-A2004 A
B
B
G
R
B
G
R
R905
R907
R901 R904
R902
R994
7-6 L4100BLP
Power Supply Block Diagram
CAUTION !
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T 4A , 250 V FUSE.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
LINE
FILTER
L601
AC601
AC CORD
BRIDGE
RECTIFIER
D605
HOT COLD
T601
11
9
12
14
15
16
7
4
3
1
2
MAIN CBA
CN101A
Q505
Q504
Q503
HOT CIRCUIT. BE CAREFUL.
5
3
2
Q511
Q502
Q501
REG+5V
AL+3.3V
AL+8V
PROTECT-1
+12V
AL+33V
P-ON-H
Q506
Q633
PROTECT-2
IC631
+5V
REG
10
13
IC504
+3.3V
REG
IC601
ERROR
VOLTAGE
DET Q507
Q512
VR649
TP401
+B
Q510
4
1
2
7
5
6
PROTECT-3
CN103A
AL+5V
P-ON-H2
AL+13V
Q508
CN101B
PANEL+25V
77
PANEL+3.3V
44
PANEL+10.8V
11
PANEL+25V
PANEL+3.3V
LCD MAIN CBA UNIT
PANEL-6V
10 10 PANEL-6V
PANEL+10.8V
CN103B
AL+8V14 14
AL+5V13 13
AL+3.3V11 11
REG+3.3V
AL+5V
AL+8V15 15
REG+1.8V
AL+3.3V
IC101
+3.3V
REG
IC102
+1.8V
REG
Q511
SWITCHING
REGULATOR
IC602
+B ADJ
P-25V-ON
AL+21V
TO LCD BACKLIGHT
BLOCK DIAGRAM (A)
TO LCD BACKLIGHT
BLOCK DIAGRAM (B)
4
3
1
2
+8V
REG
IC503
IC603
ERROR
VOLTAGE
DET
IC507
+5V
REG
INVERTER CBA
AL+21V33
AL+21V22
AL+21V11
AL+21V44
CN405 CN1401
P-ON-L
B
Comparison Chart of
Models & Marks
Model Mark
LCD-A1504
LCD-A2004 A
B
B
B
B
A
A
F601
T4A L 250V
Q603
Q602
D505
SHUNT
REGULATOR
(
(
D525
SHUNT
REGULATOR
(
(
D649
SHUNT
REGULATOR
(
(
7-7 L4100BLLB
LCD Backlight Block Diagram ( A )
T401
3
4
BACK
LIGHT
CN401
2
1
2
5
1
610
9
7
8
OVER VOLTAGE
PROTECTOR
Q423,Q427
OVER VOLTAGE
PROTECTOR
Q424,Q428
T402
3
4
2
5
1
610
9
7
8
BACK
LIGHT
CN402
2
1
SWITCHING
Q425,Q426
SWITCHING
Q421,Q422
OVER CURRENT
PROTECTOR
Q462
PWM
CONTOROL
Q468
BACKLIGHT-ADJ
OVER VOLTAGE
PROTECTOR
Q464
+
Q461
Q460
+12V
SWITCHING
Q466
BACKLIGHT-SW
SWITCHING
BACKLIGHT-ON
Q469
PROTECT-1
LCD MODULE
MAIN CBA
AL+13V
Q463
TO
POWER
SUPPLY
BLOCK
DIAGRAM
SWITCHING
BACKLIGHT-ON
Q467
Q471
Q470
TO
SYSTEM
CONTROL
BLOCK
DIAGRAM
Comparison Chart of
Models & Marks
Model Mark
LCD-A1504
LCD-A2004 A
B
7-8
LCD Backlight Block Diagram ( B )
L4200BLLB
SW/
SW CTL
BACKLIGHT-SW
RL1401
Q1405,
Q1406
IC1401 (DC-AC INVERTER CONTROL)
Q1403
Q1402
VCC
1
2
T1401
CN1402
LCD MODULEINVERTER CBA
BACKLIGHT-ADJ
PROTECT-1
SW/
SW CTL
Q1407,
Q1408
Q1401
BACK
LIGHT
BACK
LIGHT
BACK
LIGHT
BACK
LIGHT
26
27
23
24
28
14
11
9
13
12
1
15
16
+10V
REG.
OUTPUT
LOGIC1
OUTPUT
LOGIC2
LOGIC
OVER
VOLTAGE
PROTECT
SLOW
START
OSC
PWM2
PWM1
STANDBY
PROTECT
MODE SW
4
5
7
OVER VOLTAGE
PROTECTOR
Q1410,1411
OVER VOLTAGE
PROTECTOR
Q1412,1413
T1402 CN1403
OVER VOLTAGE
PROTECTOR
Q1414,1415
1
2
T1403 CN1404
OVER VOLTAGE
PROTECTOR
Q1416,1417
OVER VOLTAGE
PROTECTOR
Q1418,1419
T1404 CN1405
OVER VOLTAGE
PROTECTOR
Q1420,1421
1
2
10
9
7
3
1
6
4
2
5
10
8
9
7
3
1
6
4
2
5
10
8
9
7
3
1
6
4
2
5
10
8
9
7
3
1
6
4
2
5
10
8
TO
POWER
SUPPLY
BLOCK
DIAGRAM AL+21V
P-ON-H
1
2
IC1402
(AMP)
IC1403
(AMP)
17 2
6
5 3
+
-
+
-
+
-
+
-
+
-
+
-
8
1314
9
1012
17
26
35
TO
SYSTEM
CONTROL
BLOCK
DIAGRAM
Comparison Chart of
Models & Marks
Model Mark
LCD-A1504
LCD-A2004 A
B
L4100SCM1
8-3
Main 1/4 & IR Sensor Schematic Diagram Comparison Chart of
Models and Marks
MODEL MARK
LCD-A1504 A
LCD-A2004 B
L4100SCM2
Main 2/4 Schematic Diagram
8-4
L4100SCM3
Main 3/4 Schematic Diagram
8-5
Comparison Chart of
Models and Marks
MODEL MARK
LCD-A1504 A
LCD-A2004 B
L4100SCM4
Main 4/4 Schematic Diagram
8-6
Comparison Chart of
Models and Marks
MODEL MARK
LCD-A1504 A
LCD-A2004 B
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
CAUTION !
For continued protection against fire hazard,
replace only with the same type fuse.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
This manual suits for next models
1
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