LG L1512S User manual
L1512S Service Manual
10/24/2002
TABLE OF CONTENTS
PAGE
1. PRECAUTION AND NOTICES------------------------------------------------------------------------------------- 1~2
1.1. SAFETY PRECAUTIONS ---------------------------------------------------------------------------------------- 1
1.2. PRODUCT SAFETY NOTICE----------------------------------------------------------------------------------- 1
1.3. SERVICE NOTES-------------------------------------------------------------------------------------------------- 1
2. SERVICE TOOL & EQUIPMENT REQUIRED---------------------------------------------------------- 2
3. SPECIFICATIONS----------------------------------------------------------------------------------------------------- 2~4
3.1. PRODUCT SPECIFICATIONS------------------------------------------------------------------------------ 2
3.2. SUPPORTING TIMING CHART---------------------------------------------------------------------------- 3~4
3.3. D-SUB CONNECTOR -------------------------------------------------------------------------------------------- 4
4. EXPLODED VIEW AND PARTS LIST --------------------------------------------------------------------------- 5~7
4.1. EXPLODED VIEW------------------------------------------------------------------------------------------------ 5
4.2. EXPLODED VIEW PARTS LIST-------------------------------------------------------------------------------- 6
5. BLOCK DIAGRAM---------------------------------------------------------------------------------------------------- 7
6. SCHEMATIC DIAGRAM -------------------------------------------------------------------------------------------- 8~14
6.1. VGA INPUT -------------------------------------------------------------------------------------------------------- 8
6.2. MVZ ----------------------------------------------------------------------------------------------------------------- 9
6.3. MCU----------------------------------------------------------------------------------------------------------------- 10
6.4. OUTPUT CONNECTOR ----------------------------------------------------------------------------------------- 11
6.5. Panel_Power------------------------------------------------------------------------------------------------------- 12
6.6. AC-DC Power------------------------------------------------------------------------------------------------------ 13
7. WORKING THEOREM----------------------------------------------------------------------------------------------- 14
8. WIRING DIAGRAM--------------------------------------------------------------------------------------------------- 15
9. PCB LAYOUT----------------------------------------------------------------------------------------------------------- 16~21
9.1. MAIN PCB TOP VIEW ------------------------------------------------------------------------------------------- 16
9.2. MAIN PCB BOTTOM VIEW------------------------------------------------------------------------------------- 17
9.3. CON PCB TOP VIEW -------------------------------------------------------------------------------------------- 18
9.4. CON PCB BOTTOM VIEW -------------------------------------------------------------------------------------- 19
9.5. POWER PCB TOP VIEW ---------------------------------------------------------------------------------------- 20
9.6. POWER PCB BOTTOM VIEW---------------------------------------------------------------------------------- 21
10. TROUBLE SHOOTING FLOW CHART ------------------------------------------------------------------------- 22~24
10.1. NO POWER -------------------------------------------------------------------------------------------------------- 22
10.2. NO DISPLAY------------------------------------------------------------------------------------------------------- 23
10.3. NO SOUND -------------------------------------------------------------------------------------------------------- 24
11. ADJUSTMENT---------------------------------------------------------------------------------------------------------- 25~26
11.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS------------------------------------------------------- 25
11.2. MAIN ADJUSTMENTS ------------------------------------------------------------------------------------------- 25
11.3. ALIGNMENT PROCEDURES----------------------------------------------------------------------------------- 25
12. ELECTRICAL PARTS LIST ---------------------------------------------------------------------------------------- 27~34
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L1512S Service Manual
-1- 10/24/2002
1. PRECAUTION AND NOTICES
1.1. SAFETY PRECAUTIONS
This monitor is manufactured and tested on a ground principle that a user's safety comes first.
However, improper use or installation may cause damage to the monitor as well as to the user.
Carefully go over the following WARNINGS before installing and keep this guide handy.
WARNINGS:
! This monitor should be operated only at the correct power sources indicated on the label on
the rear end of the monitor. If you're unsure of the power supply in your residence, consult
your local dealer or power company.
! Use only the special power adapter that comes with this monitor for power input.
! Do not try to repair the monitor your self as it contains no user-serviceable parts. This
monitor should only be repaired by a qualified technician.
! Do not remove the monitor cabinet. There is high-voltage parts inside that may cause
electric shock to human bodies, even when the power cord is unplugged.
! Stop using the monitor if the cabinet is damaged. Have it checked by a service technacian.
! Put your monitor only in a clean, dry environment. If it gets wet, unplug the power cable
immediately and consult your service technician.
! Always unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth.
Apply non-ammonia based cleaner onto the cloth, not directly onto the glass screen.
! Keep the monitor away from magnetic objects, motors, TV sets, and transformer.
! Do not place heavy objects on the monitor or power cord.
1.2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety visual inspections and the
protection afforded by them cannot necessarily be obtained by using replacement components
rated for higher voltages, wattage, etc. Before replacing any of these components read the parts
list in this manual carefully. The use of substitute replacement parts which do not have the same
safety characteristics as specified in the parts list may create shock, fire, or other hazards.
1.3. SERVICE NOTES
1. When replacing parts or circuit boards, clamp the lead wires around terminals before
soldering.
2. When replacing a high wattage resistor (more than 1W of metal oxide film resistor) in circuit
board, keep the resistor about 5mm away from circuit board.
3. Keep wires away from high voltage, high temperature components and sharp edges.
4. Keep wires in their original position so as to reduce interference.
5. Usage of this product please refer to also user's manual.
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L1512S Service Manual
-2- 10/24/2002
2. SERVICE TOOL & EQUIPMENT REQUIRED
1. SIGNAL GEN.
2. MULTIMETER
3. OSCILLOSCOPE
4. SCREW DRIVER
5. IRON
6. ABSORBER
7. SOLDER
8. DUMMY LOAD (5ohm/200W)
3. SPECIFICATIONS
3.1. PRODUCT SPECIFICATIONS
LCD Panel 15.0" TFT
Power Management Energy Star compliant VESA
DPMS compatible
< 3W
Displayable Resolution XGA 1024× 768 (max.)
Pixel Dimension 0.297× 0.297mm
LCD Display Color 16.7M Color Max. (8bit)
Viewing Angle CR≧10
Horizontal: -60°~+60°
Vertical: -55°~+45°
Tilt +20°, -3°
Contrast Ratio 200 : 1 (min.)
350 : 1 (typ.)
Brightness 200cd/ m2 (min.)
250 cd/m2 (typ.)
Response Time Tr: 13 ms Tf: 27ms (typ.)
Active Display Area 304.1mm× 228.1mm
Temperature Operating: 0°C ~ +40°C
Storage: -20°C ~ +60°C
Compliance TCO99, UL, cUL, Nemko, CE, TÜV/GS, FCC, EPA, MIC,
GOST, MEEL, PCBC, PSB, VCCL, C-Tiek, ISO13406-2.
Power Input Voltage: 100~240 Vac
Consumption: 30Watts (Max.)
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L1512S Service Manual
-3- 10/24/2002
3.2. SUPPORTING TIMING CHART
ITEM 1 2 3 4 5
TIMING 720×400@70Hz 640×480@60Hz 640×480@67Hz 640×480@75Hz 800×600@56Hz
Pixel Rate 28.322MHz 25.175MHz 30.240MHz 31.500MHz 36.000MHz
H TOTAL 31.778us 31.778us 28.571us 26.667us 28.444us
H DISPLAY 25.422us 25.422us 21.164us 20.317us 22.222us
H B-Porch 1.907us 1.907us 3.175us 3.810us 3.556us
H Width 3.813us 3.813us 2.116us 2.032us 2.000us
H Border 0.318us 0.318us 0.000us 0.000us 0.000us
V TOTAL 14.268ms 16.683ms 15.000ms 13.334ms 17.778ms
V DISPLAY 12.711ms 15.253ms 13.714ms 12.800ms 17.066ms
V B-Porch 1.112ms 1.049ms 1.114ms 0.427ms 0.626ms
Vs Width 0.064ms 0.064ms 0.086ms 0.080ms 0.057ms
V Border 0.222ms 0.254ms 0.000ms 0.000ms 0.000ms
H/V Sync -/+ -/- -/- -/- +/+
Interlace No. No. No. No. No.
ITEM 6 7 8 9 10
TIMING 800×600@60Hz 800×600@72Hz 800×600@75Hz 832×624@74.5Hz 1024×768@60Hz
Pixel Rate 40.000MHz 50.000MHz 48.500MHz 57.280MHz 65.000MHz
H TOTAL 26.400us 20.800us 21.333us 20.112us 20.677us
H DISPLAY 20.000us 16.000us 16.162us 14.525us 15.754us
H B-Porch 2.200us 1.280us 3.232us 3.771us 2.462us
H Width 3.200us 2.400us 1.616us 1.118us 2.092us
H Border 0.000us 0.000us 0.000us 0.000us 0.000us
V TOTAL 16.579ms 13.853ms 13.333ms 13.417ms 16.666ms
V DISPLAY 15.840ms 12.480ms 12.800ms 12.552ms 15.880ms
V B-Porch 0.607ms 0.478ms 0.448ms 0.784ms 0.600ms
Vs Width 0.106ms 0.125ms 0.064ms 0.060ms 0.124ms
V Border 0.000ms 0.000ms 0.000ms 0.00ms 0.000ms
H/V Sync +/+ +/+ +/+ -/- -/-
Interlace No. No. No. No. No.
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L1512S Service Manual
-4- 10/24/2002
ITEM 11 12 13 14 15
TIMING 1024×768@70Hz 1024×768@75Hz
Pixel Rate 75.000MHz 78.750MHz
H TOTAL 17.707us 16.660us
H DISPLAY 13.653us 13.003us
H B-Porch 1.920us 2.235us
H Width 1.813us 1.219us
H Border 0.000us 0.000us
V TOTAL 14.272ms 13.328ms
V DISPLAY 13.599ms 12.795ms
V B-Porch 0.513ms 0.466ms
Vs Width 0.106ms 0.050ms
V Border 0.000ms 0.000ms
H/V Sync -/- +/+
Interlace No. No.
3.3. D-SUB CONNECTOR
D-SUB 15 PIN CONNECTOR
SIGNAL LEVEL
CONNECTOR SIGNAL DESCRIPTION
R RED 0.7vp-p(VIDEO)
G GREEN 0.7vp-p(VIDEO)
B BLUE 0.7vp-p(VIDEO)
H H/SYNC TTL positive or negative
V V/SYNC TTL positive or negative
SDA DDC1/2B TTL
SCL DDC1/2B TTL
12345
678910
11 12 13 14 15
1.R 6.GND 11.NC
2.G 7.GND 12.SDA
3.B 8.GND 13.H-SYNC
4.NC 9. +5V 14.V-SYNC
5.ST 10.GND 15.SCL
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10/24/2002 -5-
4.1. EXPLODED VIEW
(L1512S)
FIG.1
FIG.2
POWER PCB ASS'Y
9H01
9R81
9S03 X4 9S01
9H01
9S02
NOTE.1 FIG.3
2C12
0.12:1
1F01
1F04
1F02
1F24 X2
1F09 X4
1F09 X4
KEYPAD PCB ASS'Y
A
1F13 X6
9R01
FIG.2
1F22 X4
P983
MAIN PCB ASS'Y
1F15 X4
U901
1F21
1F11
1F18
X2
1F08 X2
P985
2C10
1F19 X2
FIG.4
FIG.3
FIG.4
1F34 X2
A
P987
1F10 X2
V901
1F07
1F25 X2
1F08 X4
1F36
1F12
2C02
P963 SCREW
X4
5B10
5B07
5B05
5B06
5B01
5B11
P988
X4
5B08
5B15
X4
5B04
FIG.1
2C03
5B09 X4 2C07
2C11
2C01
1F31
1F31
2C04 X2
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L1512S Service Manual
-6- 10/24/2002
4.2. EXPLODED VIEW PARTS LIST
Ref. No. Source Part No. DESCRIPTION SPECIFICATION Q‘TY REMARK
1F01 2024263701 FRONT BEZEL L1512S PC+ABS SILVER"LG STD" 1
1F02 2044263701 FUNCTION KEY L1512S PC+ABS SILVER "LG STD" 1
1F04 2053259300 INDICATOR L1512S PMMA 1
1F07 2071964600 METAL FITTG L1512S SECC 0.8t BKT 1
1F08 2080002300 SCREW,SPE L355 M3*8 DH NICKEL-PLATED 6
1F09 2080002200 SCREW,SPE L355 M3x6 DH NICKEL-PLATED 8
1F10 2081430062 SCREW,(WASH) M3X6 P=0.5(TOOTH WASHER) 2
1F11 2072450100 INSULATOR JT166E PC 185LX25.3WX14.6HX.2t 1
1F12 2071665200 SHIELD PLATE L1512S SPTE 0.3t MAIN-BOARD 1
1F13 2082630062 SCREW M3X6 P=0.5 6
1F15 2082630062 SCREW M3X6 P=0.5 4
1F18 2071665300 SHIELD PLATE L1512S SPTE 0.3t INVERT 1
1F19 2082630062 SCREW M3X6 P=0.5 2
1F21 2082630062 SCREW M3X6 P=0.5 2
1F22 2081430062 SCREW,(WASH) M3X6 P=0.5(TOOTH WASHER) 4
1F24 2084730082 SCREW,BND T+ M3X8(BND T+) 2
1F25 2084730122 SCREW,BND T+ M3X12(BND T+) 2
1F31 2071964500 METAL FITTG L1512S SUPPORT SECC t=0.8 2
1F34 2063251800 SPACER SUPPORT L1512S NYLON 66 PBT+30%GF 2
1F36 2085740082 SCREW,B OTW+ SCREW B OTW+ M4X8 1
2C01 2022260601 CABI BACK L1515S PC+ABS 94V0 DARK GRAY 1
2C02 2071862000 BRACKET,FIX L1512S SECC 1.6t AC CABLE 1
2C03 2054255101 ORNAMENT L1512S PC=ABS ER-95 94V0 1
2C04 2084730102 SCREW,BND T+ M3X10(BND T+) 2
2C07 2027256501 DUST COVER L1512S PC+ABS 94V0 ER-95 1
2C10 2071862100 BRACKET,FIX L1512S SECC 1.6t POWER 1
2C11 2071861900 BRACKET,FIX L1512S SECC 1.6t AC CABLE 1
2C12 2071958300 METAL FITTG VE170 KENSINGTON 1
5B01 2028255801 STAND L1512S HF350u-87074 1
5B04 2039802302 FOOT PAD CR φ16.5x7.3 4
5B05 2106654700 HINGE L1512S-5~90' 1
5B06 2028551801 NECK L1512S HF350u-87074 1
5B07 2028551701 NECK L1512S HF350u-87074 1
5B08 2085740102 SCREW,B OTW+ SCREW B OTW+ M4X10 4
5B09 2087340106 SCREW,B SPW+ 4X10(+)SWRM-3 ZMC2-C 4
5B10 2084740102 SCREW,BND T+ M4X10(BND T+) 4
5B11 2071861800 BRACKET,FIX L1512S SECC t1.4 BASE 1
5B15 2071862300 BRACKET,FIX L1512S SECC 0.8t EMI CODE 1
9H01 2072258100 HEAT SINK AL-6063S t=1.5mm 2
9R01 2072451900 INSULATOR NYLAR t=0.2mm 94V0 1
9R81 2429150100 TUBE,SILICON JT156D2 TO-220ST 0.4mm 1
9S01 2105250700 SPRING PLATE SUS 301 1
9S02 2084730082 SCREW,BND T+ M3X8(BND T+) 1
9S03 2084730082 SCREW,BND T+ M3X8(BND T+) 4
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SWITCHING POWER SUPPLY
5V for system
AC 110~220V
INPUT
12V for INVERTER
R
G
B
Hsync
Vsync BUF
I101
74LCV14
PA-HSYNC
PA-VSYNC
I102
24LC21
EEPROM DDC
SDA/SCL
FROM
D-SUB
15 PIN
I105
8051PLCC
OSC.
12MHZ
X100
KEYPAD
LCD FLAT PANEL
48 Bits
I2C BUS
INVERTER
TO
BACKLIGHT
High Volt
CPH1
STH1,LP,INV1,INV2
POL,STV1,CPV
MRT
MASCOT VZ
I001
LCD CONTROLLER
ADC+ SCALAR + T-CON
DC-DC
for PANEL POWER
VCOM 3.6V
VDDG 18V
VEEG -6V
VDDA 9.2V
VDDD 3.3V
BLT_ON
DC_EN
BRIGHTNESS
I100
24LC16B
EEPROM
EDID I2C BUS
15 inch LCD MONITOR BLOCK DIAGRAM
OSC.
12MHZ
X101
I108 AIC1341
Q105,Q106,Q107
Q108,Q114,Q115
I103,I104,I110
5V to 3.3V
3.3V to 2.5V
3.3V 2.5V
5. BLOCK DIAGRAM
10/24/2002 -7-
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Optional
Optional
74LVC14 VCC IS +3.3V
D12 NF4 C14 R11 I2
ORANGEGREEN
R108 change to C172
6. SCHEMATIC DIAGRAM
6.1. VGA INPUT
L1512S 10/24/2002 -8-
DDC-SDA
GREENGREEN
DDC-SCL
DDC-SDA
VSYNC
DDC_VCCA
VGA-GND
BLUE
HSYNC VSYNC
DDC-SCL
RED
B-GND
G-GND
R-GND
VSYNC
HSYNC
RED
BLUE
DDC-SCL DDC-SDA
PWR/LED
1
2
DOWN
PSM/LED PWR/SW
UP
VGA_GND
PC_5V
PA-HSYNC 2
PA-VSYNC 2
PA-GREEN 2
SOGI2
PA-RED 2
PA-BLUE2
DDC-SCL1 3
DDC-SDA1 3
DDC-SCL 3
DDC-SDA 3
VGA-DET
3.3V
VCC
+3.3V
+3.3V
VCC
D108
1N4148
D109
1N4148
D105
1N4148
L101 32
R105 22
D110
1N4148
C110
150pF
C108
10P
L103 32
R110150
L102 32
R103 100
C113
0.1u
R107100
P108
8 PIN SOCKET
S703
S701
S704
S705
C172
NC
P701
8 HEADER 2mm
1
2
3
4
5
6
7
8
S702
D701
C101 0.1u
C102 0.1u
R100
75
J101
CONN RCPT 13
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
C100 NC
C103 0.1u
I101C
74LVC14
5 6
I101B
74LVC14
3 4
I101E
74LVC14
11 10
I101D
74LVC14
9 8
R229330
I101F
74LVC14
13 12
R101
75
R102
75
R106NC
C104
33p
C111
33p
C169
10p
D117
5.6V
2 1
C170
10p
D118
5.6V
2 1
D119
5.6V
2 1
D116
5.6V
2 1
R228
10K
D120
5.6V
2 1
I102
24LC21
1
2
3
4 5
6
7
8
NC
NC
NC
VSS SDA
SCK
VCLK
VCC
D111
1N4148
D112
1N4148
C109
0.1u
I101A
74LVC14
1 2
R109150C112
0.1u
C107
NC
C106
NC
C105
NC
D104
1N4148
D103
1N4148
R111150
R104100
L100
200
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DA1 C45 R44 I3
TRACE> 30 MILS
GND
Vout
Vin
Vout
SOT-223
1
2
3
L1512S 10/24/2002 -9-
6.2 MVZ
STH8
CPH2
OE2
OE3
Vref=2.5V
RA5
RA4
RA3
RA2
RA1
RA0
GA5
GA4
GA3
GA2
GA1
GA0
BA5
BA4
BA3
BA2
BA1
BA0
RB5
RB4
RB3
RB2
RB1
RB0
GB5
GB4
GB3
GB2
GB1
GB0
BB5
BB3
BB0
BB1
BB2
BB4
CPHA
RA7
RA6
GA7
GA6
BA7
BA6
BB7
BB6
GB6
GB7
RB7
RB6
CPH2
CPHA
INV1 4
SDA3
LP 4
BB[0..7] 4
STH1 4
STV1 4
RA[0..7] 4
IRQ-3
PA-VSYNC1
SCL3
PA-BLUE1
PA-RED1
INV2 4
SOGI1
POL 4
BLT_ON 3
CPV 4
PA-GREEN1
GA[0..7] 4
BA[0..7] 4
RB[0..7] 4
CPH1 4
PA-HSYNC1
GB[0..7] 4
PWM0 3
VDDCTRL 3
RESET_MASCOT3
PWM1 3
RESET3
3.3-PLL
3.3-ANA
PLL-VDD
+3.3V
+3.3V
VCC
3.3-ANA
PLL-VDD
3.3-PLL
VCC
+3.3V
+3.3V
+3.3V
GND
L106
200
L107
200
1M
R144
C147
22p C148
22p
NC
R088
R080
3.3K
X101
12MHZ
R116 10K
R078 80
R142
0
L105
200
C134
0.1u
R117 10K
C135
150p
50VNPO J
I113 P2781
2365809996
1
2
3
4 5
6
7
8
XIN/CLK
XOUT
FS1
LF VSS
MOD
FS0
VDD
C163 0.1u
C136
5600p
50V X7R K
C090
680pf
NC
R089
I103 LT1117CST-3.3
1
23
GND
VOUTVIN
C116
22u / 16V
C114
22u / 16V
R139 80
R11222/NC
R11322
R11522
R135 22
R120 4.7K
R091 1.2k
R124
10K
R123 22
0
R090
NC
R087
NC
R086
R084
0
R085
NC
R125 100
L104
200C115
220uF/ 16V
R092
0
C121
10uF/50V
C126
10uF/50V
C117
10uF/50V
C132
0.1u
R119 22/NC
R134
0
R118 22/NC TP2
C131 0.1u
C123 0.1u
I001
Mascot VZ
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
160
159
158
157
156
155
154
153
152
151
150
149
148
147
146
145
144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
125
124
123
122
121
16
DIBVDD
CAP_HREF
CAP_HSYNC
CAP_VSYNC
DIBVSS
BLU_INB_0
BLU_INB_1
BLU_INB_2
BLU_INB_3
BLU_INB_4
BLU_INB_5
BLU_INB_6
BLU_INB_7
DCVDD
GRN_INB_0
GRN_INB_2
GRN_INB_3
GRN_INB_4
GRN_INB_5
GRN_INB_6
GRN_INB_7
DCVSS
RED_INB_0
RED_INB_1/UV1
RED_INB_2
RED_INB_3
RED_INB_4
RED_INB_5
RED_INB_6
RED_INB_7
DIBVDD
DVDD
DVSS
DTEST
DVCC
DGND
VGA_VSYNC
VGA_HSYNC
SOGI
AVCC
AGND
VREF
CP
CZ
VCCAB
BI
GNDAB
BCLP
VTOP
VBOT
VCCAG
GI
GNDAG
GCLP
TOUTP
TOUTM
VCCAR
RI
GNDAR
RCLP
PLLVDD
PLLVSS
DCVSS
GPIO2
GPIO1
GPIO0
STH1
STH8
LP
DCVDD
SHC
XTAL
XTALI
DIBVSS
RLS
POL
CPH1
INV1
DCVSS
DOBVSS
BLU_OUTB_7
BLU_OUTB_6
BLU_OUTB_5
BLU_OUTB_4
DOBVDD
BLU_OUTB_3
BLU_OUTB_2
BLU_OUTB_1
BLU_OUTB_0
DOBVSS
RED_OUTA_7
RED_OUTA_6
RED_OUTA_5
RED_OUTA_4
DCVDD
RED_OUTA_3
RED_OUTA_2
RED_OUTA_1
RED_OUTA_0
DCVSS
GRN_OUTA_7
GRN_OUTA_6
GRN_OUTA_5
GRN_OUTA_4
DOBVDD
GRN_OUTA_3
GRN_OUTA_2
GRN_OUTA_1
GRN_OUTA_0
DOBVSS
BLU_OUTA_7
BLU_OUTA_6
BLU_OUTA_5
BLU_OUTA_4
DOBVDD
BLU_OUTA_3
BLU_OUTA_2
BLU_OUTA_1
BLU_OUTA_0
TVCLK
IRQ#
SCS#
SDA
SCL
RST
STV3
STV1
DCVSS
CPV
OE3
OE2
OE1
CPH2
PWM0
PWM1
DCVDD
INV2
LCD_VDD
LCD_VBL
DCVSS
RED_OUTB_7
RED_OUTB_6
RED_OUTB_5
RED_OUTB_4
DOBVDD
RED_OUTB_3
RED_OUTB_2
RED_OUTB_1
RED_OUTB_0
DOBVSS
GRN_OUTB_7
GRN_OUTB_6
GRN_OUTB_5
GRN_OUTB_4
DOBVDD
GRN_OUTB_3
GRN_OUTB_2
GRN_OUTB_1
GRN_OUTB_0
GRN_INB_1
C124 0.1u
C128 0.1u
C125 0.1u
C127 0.1u
C129 0.1u
C130 0.1u
C120 0.1u
C122 0.1u
R141 80
C137
0.01uR140 22/NC
R186
1K/NC
C141
4700p C142
0.01u
C138
4700p
C143
4700p
C091
6800pf
+
C140
10uF/50V
C139
0.1u
I110
TL431
2 3
1
R126 NC
R127 100
TP3
TP6
R128 100
R122 80
R121 3.3K
R079
3.3K
R13775
C144
0.1u C145
0.1u
C133
NC
C146
0.1u
R133 80
C162 NC
C161
22p
R143 22
R077 100
R114 10K
TP1
C118
22u / 16V
I104 LT1117CST-3.3
1
23
GND
VOUTVIN
C119
22u / 16V
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2.0 mm
Audio control for LP14/AL512 only
B
C
E
Winbond ISP FOR Winbond ISP
6.3 MCU
L1512S 10/24/2002 -10-
RESET
UP
SDA
TxD
RxD
SCL
SDA
POWER
P
DOWN
D
ENTER
E
MENU
M
U
SCL
MUTE
LED_GRN
LED_OR
LED_GRN
LED_OR
LED_GREEN
AMBER
Brightness
DC_EN1
DC_EN1
PWM1
GND
PWM1
TxD
RxD
SCL2
IRQ-2
SDA2
DDC-SCL1
DDC-SDA1
RESET_MASCOT 2
DDC-SCL1 1
DDC-SDA1 1
BLT_ON 2
DC_EN
5
PWM1 2
PWM0 2
VDDCTRL2
RESET2
VDDCTRL2
VDDD 4
EN_18V
VGA-DET
VCC
VCC
VCC
VCC
VCC
VCC
12V
12V
5V
VCC
VCC
VCC
VCC
+3.3V
+3.3V
R187
4.7K
J108
5pin/2mm
1
2
3
4
5
1
2
3
4
5
L115
NC
R169
1K
R168
1K
Q109
SST3904
C160
10uF/50V
C167
NC
+
C288
470uF/16V
+
C289
NC
C149
0.1u
C153
0.1u
L114
NC
C157
0.1u
L109 3.5X9X0.8
R188
4.7K
C154
0.1u C155
0.1u C156
0.1u
R076
NC
C168
NC
R189
4.7K
Q110
SST3904R156
150
R155
150
16
7 17
18 28
29 39
40
P105
PLCC-44 SOCKET
+C164
1uF/50V
L1133.5X9X0.8
+
C282
470uF/16V
<Spec>
C150 22p
X100
12MHZ
J104
MRT DEBUG I/O/NC
1
2
3
4
5
10
9
8
7
6
1
2
3
4
5
10
9
8
7
6
R150 NC
I112
LT1117CST-3.3
1
23
GND
VOUTVIN
I105
8051PLCC
35
21
20
10
14
15
16
17
2
3
4
5
6
7
8
9
43
42
41
40
39
38
37
36
24
25
26
27
28
29
30
31
19
18
32
33
13
11
4422
23
34
1
12
EA/VP
X1
X2
RESET
INT0 / P3.2
INT1 / P3.3
T0 / P3.4
T1 / P3.5
P1.0 / T2
P1.1 / T2EX
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
AD0 / P0.0
AD1 / P0.1
AD2 / P0.2
AD3 / P0.3
AD4 / P0.4
AD5 / P0.5
AD6 / P0.6
AD7 / P0.7
A8 / P2.0
A9 / P2.1
A10 / P2.2
A11 / P2.3
A12 / P2.4
A13 / P2.5
A14 / P2.6
A15 / P2.7
P3.7/ RD
P3.6 / WR
PSEN
ALE
P3.1 / TXD
P3.0 / RXD
VCCVSS
P4.0
P4.1
INT3 / P4.2
INT2 / P4.3
C152
0.1u
R075 150
R074 150
C151 22p
R191
4.7K
C066
NC
R193
NC
I100
24LC16B
1
2
3
4
5
6
7
8
A0
A1
A2
VSS
SDA
SCL
WP
VCC
D113
1N4148
1 2
C212
0.1u
Q101
NC
Q111
SST3904
R171
3.3K
Q102
MMBT3906
13
2
R195
2.2K
C166
0.1u
Q113
MMBT3906
1
2 3
C165
0.1u
R194
100K
L108
200
R173
1K
R172
4.7K
C209
0.1u
R196
4.7K
R081
150
Q103
SST3904
P100
8 PIN SOCKET
+C171
NC
R184
NC
R183
0
R190
4.7K
Q100
MMBT3906
13
2
R145
4.7K
R146
4.7KR147
NC R148
NC
R185
NC
R161
150
R160
150
R154
330
R197
4.7K
Q104
2SA1020
J109
NC
1
2
3
1
2
3
R165
4.7K
J103
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
R198
4.7K
R163
330
R166
4.7K
R159
150
R153
10K
R162
10K
R157
150
R158
150
R082
150R083
150
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3.6V
3.3V
-6V
18V
5
L1512S 10/24/2002 -11-
6.4 OUTPUT CONNECTOR
GA0
GA1
GA2
GA3
GA4
GA5
GA6
GA7
RA0
RA1
RA2
RA3
RA4
RA5
RA6
RA7
BB0
BB1
BB2
BB3
BB4
BB5
BB6
BB7
GB6
GB4
GB5
GB0
GB7
GB3
GB2
GB1
RB7
RB4
RB0
RB5
RB3
RB2
RB6
RB1
T_BA2
T_BA3
T_BA4
T_BA5
T_BA6
T_BA7
CPH1
T_BB5
T_BB4
T_BB6
T_BB3
T_BB7
T_BB2
T_GB7
T_BB0
T_GB4
T_BB1
T_GB6
T_GB5
T_GB2
T_GB3
T_RB1
T_RB5
T_RB7
T_GB1
T_RB4
T_GB0
T_RB2
T_RB6
T_RB3
T_RB0
VCOM
VDDD
VDDG
VEEG
VDDA
T_GA0
T_GA1
T_GA2
T_GA3
T_GA4
T_GA5
T_GA6
T_GA7
T_RA0
T_RA2
T_RA1
T_BB2
T_BB3
T_BB5
T_BB4
T_BB7
T_BB1
T_BB6
T_BB0
T_GB2
T_GB3
T_GB5
T_GB4
T_GB7
T_GB1
T_GB6
T_GB0
T_RB2
T_RB3
T_RB5
T_RB4
T_RB7
T_RB1
T_RB6
T_RB0
T_RA3
T_RA5
T_RA7
T_RA4
T_RA6
T_BA4
T_RA7
T_RA1
T_BA6
T_RA6
T_BA3
T_BA0
T_GA6
T_BA2
T_GA7
T_GA4
T_BA7
T_RA0
T_RA5
T_GA0
T_RA4
T_RA3
T_GA1
T_RA2
T_BA5
T_GA3
T_BA1
T_GA5
T_GA2
T_BA0
BA4
BA6
BA5
BA1
BA7
BA2
BA3
BA0 T_BA1
BB[0..7]2
BA[0..7]2
GA[0..7]2
RA[0..7]2
GB[0..7]2
RB[0..7]2
VDDD3
STV12CPV2
VEEG5
VDDG5
STH12 LP2
POL2
INV12 INV22
VDDA5
CPH12
VCOM
J106
CON50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
J105
CON50
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
CP10
33PX4
1
5
2
6
3
7
4
8
CP09
33PX4
1
5
2
6
3
7
4
8
C286
0.1uF
C285
0.1uF
C284
0.1uF
C283 0.1uF
CP12
33PX4
1
5
2
6
3
7
4
8
CP11
33PX4
1
5
2
6
3
7
4
8
+
C21810uF/50V
C287 0.1uF
CP02
33PX4
1
5
2
6
3
7
4
8
L122 80
CP06
33PX4
1
5
2
6
3
7
4
8
CP05
33PX4
1
5
2
6
3
7
4
8
CP04
33PX4
1
5
2
6
3
7
4
8
CP03
33PX4
1
5
2
6
3
7
4
8
L123 80
CP01
33PX4
1
5
2
6
3
7
4
8
+
C216
10uF/50V
+
C217 10uF/50V
+
C214 10uF/50V
+
C215 10uF/50V
L125 80
L124 80
CP08
33PX4
1
5
2
6
3
7
4
8
CP07
33PX4
1
5
2
6
3
7
4
8
L129 80
L128 80
L126 80
L127 80
L134 80
L132 80
L135 80
L133 80
L139 80
L142 80
L130 80
L131 80
L141 80
L137 80
L136 80
L138 80
L148 80
L151 80
L140 80
L143 80
L144 80
L146 80
L147 80
L150 80
L157 80
L153 80
L149 80
L145 80
L155 80
L158 80
L156 80
L159 80
L160 80
L162 80
L152 80
L154 80
L164 80
L167 80
L165 80
L161 80
L120 80
L163 80
L166 80
L121 80
All manuals and user guides at all-guides.com
-10.9V
-4.3V
26.2V
2.5V
7.6mA
VDDA
VDDG
20ms Delay
6.5 Panel Power
L1512S 10/24/2002 -12-
VCOM_3.6V
VDDG_18V
VEEG_-6V
VDDA_9.2V
VCOM 4
VDDG 4
VEEG 4
VDDA 4
DC_EN3
EN_18V
5V12V
F103
0.25A/0603
R222
360/1206
R227
0/0603
R225
100K/0603
D204
NC
C304
0.1uF
R226
10R/1206
R224
0/0603
R223
360/1206
D206
EP05QC04/SMD
Q107
CEA3055L
+
C317
1uF/50V
+
C3091uF/50V
D200
EP05QC04/SMD
+
C301
10uF/50V
+
C302
10uF/50V
D205
EP05QC04/SMD
+
C315
100uF/16V
C313
22pF/0603
C310
10nF/0603
+
C316
1uF/50V
+
C318
47uF/50V
F101
2A/24V/1206
R212
3K3 1%/0603
R205
21K 1%/0603
+
C307
220uF/16V
L111 33uH
F102
0.25A/0603
R209
5K6/0603
C312
22nF/0603
R211
12K/0603
+C308
100uF/16V
I108
AIC1341/SMD
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
Phase
Ugate
SD
VCC
SS
FB2
Vin2
Gate2GND
GATE3
FB3
COMP1
FB1
OCSET
Pgnd
Lgate
R215
1.47K 1% 0603
R217
3K3/0603
R210
110/0603
R216
1.15K 1%/0603
R218
20K5,1%/0603
R20736K
R219
3K3 1%/0603
+
C314
10uF/50V
R213
3.3K/0603
I109
TL431A
D202
EP05QC04/SMD
D201
EP05QC04/SMD
Q106
CEA3055L
R200
10K/0603
R201
4K32 1%/0603
+
C305
NC
J110
CONN SOCKET 5
1
2
3
4
5
1
2
3
4
5
I106
TL431A
+
C319
NC
R214
1K VR 10%
+
C311
10uF/50V
R206
10K/0603
R202
1K/0603
+
C303
10uF/50V
Q105
2SA2907
D203
EC10QC04/SMD
C300
0.1uF
Q108
KSP2222A
Q114
2SA1020Y
Q115
PMBT3904/SMD
C321
0.1uF
R221
10K/0603
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FG
4
32
1
(2) AL-EL capacitor - temperture is 105'C , if not indicated.
(1) Resistor - power rating is 1/8W , if not indicated.
6.6 POWER
L1512S 10/24/2002 -13-
+5V
+12V
+5V
GND
GND
C813
1500uF/10V
D805
31DQ06FC
t
R840
10/3A
1 2
C812
100uF/400V
12
R805
47K/5W
12
I803
TL431CLP
2 3
1
C810
0.033UF/100V MEF
C820
100n/63V
D804
FCH20A10 20A100V
R809
15/1W C822
2200PF/500V
1 2
R811
4K7K/1%
C806
0.022UF/400V
12
D802
UF4007
1 2
D803
UF4005
C819
1000P/50V
F801
2.5A/250V
T801
L=1.2mH
9
3
5
6
1
2
7
8
11
10
12
C814
1500uF/10V
Q801
NC
R804
430K/3W
1 2
C801
0.22uF/275V
C809
100n/50V
12
C808
47uF/50V
12
R807
JUMPER
C811
NA
1 2
C823
4700pF/250Vac
1 2
R812
2K43K/1%
C824
0.22uF/275V
R814
2K2/1%
R815
120/1W
L804
15UH
P802
S5B-XH-A 5P/P=2.5
1
2
3
4
5
C816
NC
R817
1K
C815
1500uF/10V
12
L802
Bead,T3.5x0.8x9
D807
6.2V
D806
15V
R806
3K48/1%
R813
100
R810
20K 1%
R816
10/0.5w
P801
Connector
1
2
L801
JUMPER
L803
JUMPER
R841
470
I802
TLP621
I801
KA5M0365R
1 3
4 2
GND Vcc
FB D
C817
1000uF/10V
12
- +
D801
KBJ4J 4A 600V
1
2
3
4
C803
4700PF
12
R801
1M 1/2W
12
L805
1
5
4
8
C802
4700PF 12
C807
68P/1KV
All manuals and user guides at all-guides.com
L1512S Service Manual
-14- 10/24/2002
7. WORKING THEOREM
A. DC-DC CONVERTER
This block provides adjustable output voltages of 9.2V, -6V, 18V and 3 to 4V for the panel.
It consists of a Q114 transistor and power switch IC I108 (AIC 1526-1).
When DC_ EN signal is high, then Q114 is activated and send one signal to activate I108.
At this time I108 will send 200KHz 12V PWM to Q106, Which is connected with L111, Q106,
D203 and C308, to boost 5V to 9.2V. And I108 offers the adjustable voltage of 3V to 4V. By
sending out pulses from pin 2 and pin 16 of I108 to double voltage circuit consisting of C301,
D201, D202 and C303, leaner regulator with Q105, would output –6V, 18V output id created,
according to the rule of –6V creation.
B. Scalaring controller
MascotV scalar is a highly integrated solution that combines a high performance ADC with an
advanced image processing controller. Using advanced image scaling algorithms, Mascot V has
intelligently adaptive sub-algorithms that will automatically optimize the display quality for
different images – the text is sharper and the graphics is smoother. The built-in analog interface
includes a 160Mhz, 8-bit 3-channel ADC, preamplifier, and VGA, allowing seamless support to
resolutions from VGA to XGA. MascotV also offers other integrated functions such as an internal
OSD that supports all languages, and build-in line buffers that allows support to a wide range of
LCD panels.
The scalar implements four advanced display technologies:
1.Sampling RGB input signals by fully integrated triple-channel ADC, PLL, and pre-amplifier
2.Automatically calibrate for vertical and horizontal alignment to center display and phase
calibration
3.High-quality advanced scaling: Enhanced and adaptive scaling algorithm for optimal image
quality
4.One and two pixels per clock panel support: Up to 24 bits per pixel.
The panel interface consists of 48-bit panel data bus, Start Pulse(STH1) and Clock (CLKH),
Polarity(POL)/Latch pulse(LP) for source driver IC, Start pulse(STV1) and Clock(CLKV) for gate
driver IC, and Data inversion control(HMSO/HMSE) for odd/even pixel bus and the power supply
(+3.2V, +3.45V<adjustable>,+9.2V, +18Vand-6V) for panel driver IC use.
C. Inverter
In order to drive the CCFLs embedded in the panel module, there is a ROYER inverter to convert
to convert
The input 12V up to hundreds of AC voltage output.
The inverter is formed by symmetric, in order to drive the separate lamp modules.
The input stage consists of a PWM controller, buck choke, and switching MOSFET to convert DC
input into AC output.
The output stage consists of a tuning capacitor, transformer, push-pull transistor pair to boost ac
output up to hundreds of voltage.
And one resister is serial to lamp for output current feedback.
A 5-pin connector is the only interface to control the inverter. Pin 1 is 12V input, Pin 2/4 is the
returns, pin3 is the control of output current, and pin 5 is the enable/disable control.
All manuals and user guides at all-guides.com
10/24/2002
-15-
8. WIRING DIAGRAM
(L1512S)
LCD PANEL
P980
GND
TO:METAL FITTG
POWER PCB
(BRN) (BLU) P701
P801 P982
P802
INVERTER PCB
JP2
TO:GND
JP1
JP3
P802
P983
I/O CABLE
P981
(BRN)
AC SOCKET ASS'Y
N
(BLU) L
KEYPAD PCB
P985
J103
J101
J105
1
I105
J109
J106
I001
50
1
J107 J110
50
J108
MAIN PCB
P963
L901
L902
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all-guides.com
L1512S 10/24/2002 -16-
9.1. MAIN PCB TOP VIEW
9. PCB LAYOUT
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9.3. CON PCB TOP VIEW
L1512S 10/24/2002 -18-
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