AOC L1910i Service Manual
19" LCD Color Monitor HP L1910i
Service
Service
Service
Horizontal Frequency
24- 83 kHz
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents.......……..............................…........1
Revision List.…........................................……......2
1. Monitor Specification..............................………........3
2. LCD Monitor Description…………………………….......4
3. Operation Instruction…………...............……...........5
3.1. General Instructions...........................…...........5
3.2. Control Button…………….…..............……...............5
3.3 Adjusting the Picture...........................…............6
4. Input/Output Specification............……………............10
4.1. Input Signal Connector............………….................10
4.2. Factory Preset Display Modes......…..................10
5. Panel Specification.....………………..................11
5.1. General Feature…….....………………..................11
5.2. Optical Characteristics………………………………11
6. Block Diagram……...................…………................12
6.1 Software Flow Chart………………………………...12
6.2.Electrical Block Diagram……………..….......14
7. Schematic……………......................................16
7.1 Main Board....……….......................................16
7.2 Power Board.….……....................................20
7.3 Key Board…………………………………………..22
8.PCB Layout..…….......................................23
8.1. Main Board………........................................23
8.2. Power Board….......................................25
8.3. Key Board………............….......................27
9. Maintainability……….......................................28
9.1. Equipments and Tools Requirement..............28
9.2. Trouble Shooting……….............................29
9.2.1 Main Board…………..............................29
9.2.2 Power Board………..............................31
9.2.3 Key Board…………..............................33
10 White-Balance, Luminance adjustment...34
11.Mechanical Instructions……………..…...….......36
12. Monitor Exploded View………………..…....….......42
13. BOM List………………………………..……………43
14. Different Parts List.........…………..........................54
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC
EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
1
19" LCD Color Monitor HP L1910i
Revision List
Version Date Revision History TPV Model Name
A00 Nov.-21-2007 Initial release T97GMSDKHN1HNNE
T97GMSDKHN1HNNE
A01 Nov.-20-2008 Add TPVDW Model in Item 14
T97HMSDKHN1HNNE
T97GMSDKHN1HNCE
2
19" LCD Color Monitor HP L1910i
1. Monitor Specification
3
19" LCD Color Monitor HP L1910i
(
2. LCD Monitor Description
The LCD Monitor will contain main board, power board, a key board which house the flat panel control logic, brightness
control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each
voltage.
Power Board
Include adapter board)
AC-IN
110V-240V
Monitor Block Diagram
CCFT Drive.
Main Board
Keyboard
Flat Panel and
CCFL backlight
RS232 Connector
For white balance
adjustment in
factory mode
Video signal, DDC
HOST Computer
4
19" LCD Color Monitor HP L1910i
3. Operation Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located at front of the panel. By
changing these settings, the picture can be adjusted to your personal performance.
The power cord should be connected and insert to adaptor.
-
Connect the video cable from the monitor to the computer VGA card.
-
- Press the power button to turn on the monitor, the power indicator will light up to Green.
3.2 Control Button
5
19" LCD Color Monitor HP L1910i
3.3 Adjust the Picture
6
19" LCD Color Monitor HP L1910i
7
19" LCD Color Monitor HP L1910i
8
19" LCD Color Monitor HP L1910i
9
19" LCD Color Monitor HP L1910i
4. Input/Output Specification
4.1 Input Signal Connector
4.1.1 D-SUB connector
Pin Signal Pin Signal
1 Red Video 9 3.3/+5 V (from PC)
2 Green Video 10 Sync Ground
3 Blue Video 11 None
4 None 12 DDC Data
5 Ground (DDC Return) 13 Horizontal Sync
6 Red GND 14 Vertical Sync
7 Green GND 15 DDC Clock
8 Blue GND
PIN 1
PIN 11
4.2 Factory Preset Display Modes
VGA connector layout
PIN 5
10
19" LCD Color Monitor HP L1910i
5. Panel Specification
5.1 General Feature
5.2 Optical Characteristics
11
19" LCD Color Monitor HP L1910i
6. Block diagram
6. 1 Software Flow Chart
1
Y
2
N
3
4
5
N
Y
6
N
7
8
Y
9
10
N
11
12
Y
13
N
N
Y
14
15
Y
N
16
Y
17
18
N
19
Y
12
19" LCD Color Monitor HP L1910i
REMARK:
1) MCU initialize.
2) Is the EEprom blank?
3) Program the EEprom by default values.
4) Get the PWM value of brightness from EEprom.
5) Is the power key pressed?
6) Clear all global flags.
7) Are the AUTO and SELECT keys pressed?
8) Enter factory mode.
9) Save the power key status into EEprom.
Turn on the LED and set it to green color.
Scalar initialize.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are they’re any signals coming?
13) Does the scalar send out an interrupt request?
14) Wake up the scalar.
15) Are there any signals coming from analog port?
16) Display "No connection Check Signal Cable" message. And go into standby mode after the message
disappear.
17) Program the scalar to be able to show the coming mode.
18) Process the OSD display.
19) Read the keyboard. Is the power key pressed?
13
19" LCD Color Monitor HP L1910i
6.2 Electrical Block Diagram
6.2.1 Scalar Board
EEPROM
(U402)
EPR_SDA
EPR SCL
DB15_SDA,
DB15 SCL
Panel Interface
H sync
V sync
D-Sub Connector
RGB
(CN101)
(CN401)
Scalar HUM56AWL-LF
(Include ADC、OSD、MCU)
(U401)
Crystal
X201
14.318Mhz
EEPROM
M24C02
(U101)
14
19" LCD Color Monitor HP L1910i
6.2.2 Inverter / Power Board
AC input
EMI filter
Bridge
Rectifier
and Filter
Start Circuit
Transformer
Rectifier
diodes
CN902
12V
PWM
Control IC
Over
Voltage
Protect
Feedback
Circuit
5V
ON/OFF
Lamp
LC
Resonance
Transformer
MOSFET
Feedback
Circuit
Over
Voltage
PWM
Control IC
ON/OFF
Control
DIM
15
19" LCD Color Monitor HP L1910i
7. Schematic
7.1 Main Board
D107
RLZ5.6B
1
2
2
R102 100R 1/16W
R103 100R 1/16W
C102
22pF
R106
2K2 1/16W
VGA_PLUG
DSUB_5V
ZD103
RLZ5.6B
VGA_G+
3
D103
BAV99
2
1
R119 100R 1/16W
R122 100R 1/16W
D108
RLZ5.6B
3
3
D113
BAV99
2
1
VGA_B+
3
D114
BAV99
D104
BAV99
1
1
ZD104
RLZ5.6B
2
DSUB_H 2
DSUB_V 2
C103
22pF
CMVCC
C118
C112
0.1uF/ 16V
0.1uF/ 16V
DDC2_SCL
DDC2_SDA
R126 10R 1/16W
R127 10R 1/16W
R128 10R 1/16W
R129 10R 1/16W
R130 10R 1/16W
R131 10R 1/16W
3
3
D115
D116
BAV99
BAV99
1
1
2
3
2
VGA_B+
VGA_B-
VGA_G+
VGA_G-
VGA_R+
VGA_R-
DDC2_SCL 2
DDC2_SDA 2
RX0P
RX0N
RX1P
RX1N
RX2P
RX2N
R133 10R 1/16W
R136 10R 1/16W
CMVCC
D117
BAV99
1
C117
0.1uF/ 16V
12
1 2
1 2
1 2
RX0P 2
RX0N 2
RX1P 2
RX1N 2
RX2P 2
RX2N 2
FB104
120OHM
C119
0.1uF/ 16V
FB102
BEAD
FB103
BEAD
FB101
BEAD
RXCP
RXCN
R107
75R 1/16W
R112
75R 1/16W
R116
75R 1/16W
R125
NC
RXCP 2
RXCN 2
DVI_HPD
R138 10K 1/16W
VGA_PLUG
R139 6K8 1/16W
T P V ( Top Victory Electronics Co . , Ltd. )
Date
G2559-1-3-X-2-070719
02 Input
线路图编号
Key Component
R104 100R 1/16W
C104
5pF/50V
R108 100R 1/16W
R109 470R 1/16W
R111 100R 1/16W
C108
5pF/50V
R114 100R 1/16W
R115 100R 1/16W
C111
5pF/50V
R117 100R 1/16W
R124 NC
Q101
NC
VCC3.3
R137
10K 1/16W
HPD_CTRL 2
DET_CABLE 2
C101
0.047uF
C105
0.047uF
C106
1000pF
C107
0.047uF
C109
0.047uF
C110
0.047uF
C113
0.047uF
OEM MODEL Size
TPV MOD EL
PCB NAME
Sheet
DSUB_B+ 2
DSUB_B- 2
DSUB_SOG 2
DSUB_G+ 2
DSUB_G- 2
DSUB_R+ 2
DSUB_5V
CMVCC
1
DSUB_R- 2
R120
4K7 1/16W
DDC1_SCL
DDC1_SDA
DDC_WP2
4K7 1/16W
DDC2_SCL
DDC2_SDA
DDC_WP2
HP L1750/L1950 B
715G2559-1-3
of
25Thursday, July 19, 2007
R134
R121
4K7 1/16W
R135
4K7 1/16W
2
3
R118
10K 1/16W
8
7
6
CMVCC
2
3
R132
10K 1/16W
8
7
6
U101
VCC
WP
SCL
M24C02-WMN6TP
DVI_5V
1
U102
VCC
WP
SCL
M24C02-WMN6TP
Rev
备注
D105
BAV70
0.1uF/ 16V
A0
A1
A2
VSSSDA
D101
BAV70
0.1uF/ 16V
A0
A1
A2
VSSSDA
备注
C114
1
2
3
45
C116
1
2
3
45
-1-3
DDC1_SCL2
DDC1_SDA2
CN102 JACK
VSYN C
SYN C GND
DDC SCL
DDC SDA
1/3shield
2/4shield
0/5shield
clk shield
DAT0+
DAT0-
DAT1+
DAT1-
DAT2+
DAT2-
DAT3+
DAT3-
DAT4+
DAT4-
DAT5+
DAT5-
GND
26
25
GND POWER
HPD
clk+
GND
+5V
clk-
DDC1_SC L
DDC1_SD A
8
15
6
7
14
HOT_PLUG
16
11
3
19
22
18
17
10
9
2
1
13
12
5
4
21
20
23
24
DGND
R110
100R 1/16W
R113
100R 1/16W
ZD105
RLZ5.6B
DVI_HPD
ZD106
RLZ5.6B
DVI_5V
D109
RLZ5.6B
ZD101
RLZ5.6B
C115
0.1uF/ 16V
3
2
15
14
13
12
11
D110
BAV99
R101 0R05 1/16W
ZD102
RLZ5.6B
CN101
10
5
9
4
8
3
7
2
6
1
DB15
17 16
2
R123 10K 1/16W
D106
RLZ5.6B
3
D111
BAV99
1
2
1
2K2 1/16W
DSUB_5V
VGA_R+
3
2
R105
VGA_BVGA_B+
VGA_GVGA_G+
VGA_RVGA_R+
D102
BAV99
1
3
D112
BAV99
16
19" LCD Color Monitor HP L1910i
VDDC
VDDP
AVDD
VPLL
VMPLL
VCC1. 8
1
10uF/50V
FB205
0R05 1/8W
32
Q205
NC
C202
C209
NC
R209
10K 1/16W
VDDP
+
C203
0.1uF/16V
VDDC
C211
+
0.1uF/ 16V
VCC3. 3
Q203
2N3906S-RTK/PS
R216 56 OH M 1/16W
C204
0.1uF/16V
C212
0.1uF/16V
Volume# 4
C205
0.1uF/ 16V
C214
C213
0.1uF/ 16V
LED_GRN/BLUE
0.1uF/ 16V
8
24
163249
AVDD_PLL
AVDD_MPLL
56
75
VDDP
VDDP
VDDP
AVDD_ADC
14
98
AVDD_DVI
AVDD_DVI
LVDS
GND
GND
GND
GND
GND
GND
GND
GND
2
GND
5
112933
5057767983
51
668234
VDDP
VDDC
VDDC
GPIO_P15/PWM0
PWM2/GPIO_P2 4
PWM1/GPIO_P2 5
GPIO_P00/SAR1
GPIO_P01/SAR2
GPIO_P02/SAR3
PWM0/GPIO_P2 6
GPIO_P16/PWM2
GPIO_P10/ I2C_MCL
GPIO_P11/I2C_MDA
GND
U401
HUM56AWL-LF
VCTRL
VDDC
VDDC
LVA3P
LVA3M
LVACKP
LVACKM
LVA2P
LVA2M
LVA1P
LVA1M
LVA0P
LVA0M
LVB3P
LVB3M
LVBCKP
LVBCKM
LVB2P
LVB2M
LVB1P
LVB1M
LVB0P
LVB0M
NC
NC
NC
GPIO_P23
GPIO_P22
GPIO_P12
RSTN
GPIO_P06
GPIO_P07
GPIO_P13
GPIO_P14
81
PA0
54
PA1
55
PA2
58
PA3
59
PA4
60
PA5
61
62
PA6
PA7
63
PA8
64
PA9
65
PB0
67
PB1
68
PB2
69
PB3
70
PB4
71
PB5
72
PB6
73
PB7
74
PB8
77
PB9
78
36
45
46
EE_WP
41
42
35
R207 100R 1/ 16W
47
85
86
87
88
R213 100R 1/ 16W
R214 100R 1/ 16W
89
R215 100R 1/ 16W
90
R217 4K7 1/16W
91
92
R218 4K7 1/16W
R220 NC
93
94
95
R221 NC
R222 100R 1/ 16W
99
R224 100R 1/ 16W
44
43
R225 100R 1/ 16W
MSCL
MSDA
PA[0..9]
PB[0..9]
PANEL_VCC
WP
HPD_CTRL 1
Mute 4
R233
6K8 1/16W
R234 10K 1/16W
C231
0.1uF/16V
KEY2
KEY1
PA[0..9] 3
PB[0..9] 3
R202
22K 1/16W
R203
10K 1/16W
on_BACKLIGHT 4
adj_BACKLIGHT 4
DET_CABLE 1
POWER_KEY #
R223 10K 1/16W
C217
0.1uF/16V
VCC3. 31
Q201
2N3904S-RTK/PS
VCC3.3
VCC3. 3
VCC1. 84
DDC_WP 1
CMVCC
R208
6K8 1/16W
R211 10K 1/16W
C219
0.1uF/ 16V
C206
0.1uF/16V
10K 1/16W
VCC3. 3
R205
VCC3. 3
FB203
300OHM
FB201
300OHM
AVDD
C207
0.1uF/16V
VMPLL
C210
0.1uF/16V
VCC3. 3
Q202
2N3906S-RTK/PS
VCC3. 3
FB204
300OHM
VCC3. 3
FB206
0R05 1/8W
R212 75R 1/16W
C215
0.1uF/16V
LED_ORANGE
VPLL
C208
0.1uF/16V
VDVI
C216
0.1uF/16V
VCC3.3
C218
0.22uF16V
CMVCC
WP
R21010K 1/16W
C220
10uF/50V
change C221 from
22pf to 33pf
Change C222 from
22pf to 27pf
U402
1
CE
VCC
2
SO
HOLD#
3
WP#
SCK
4 5
GND SI
PM25LV010A
+
R219
100K 1/16W
AVDD
8
7
6
C221 33pF
C222 27pF 50V
DSUB_R+1
DSUB_R-1
DSUB_G+1
DSUB_G-1
DSUB_SOG1
DSUB_B+1
DSUB_B-1
DSUB_H1
DSUB_V1
DDC1_SDA1
DDC1_SCL1
RX2P1
RX2N1
RX1P1
RX1N1
RX0P1
RX0N1
RXCP1
RXCN1
DDC2_SDA1
DDC2_SCL1
R204 390 OHM 1/16W
0.1uF/ 16V
C201
PPWR_ON #3
R201 0R 05 1/16W
X201
14.31818MHz
1 2
C223 0.1uF/16V
R226
10K 1/16W
VDVI
23
RIN0P
22
RIN0M
20
GIN0P
19
GIN0M
21
SOGIN0
18
BIN0P
17
BIN0M
27
HSYNC0
28
VSYNC 0
30
DDCA_SD A/RS232_TX
31
DDCA_SCL/ rs232_RX
3
R+
4
R-
6
G+
7
G-
9
B+
10
B-
12
CK+
13
CK-
100
DDCD_SDA
1
DDCD_SCL
15
REXT
26
REFP
25
REFM
37
SDO
38
SCZ
39
SCK
40
SDI
48
GPIO_P27/PWM1
84
RST
96
XIN
97
XOU T
80
BYPASS
52
MODE [0]
53
MODE [1]
R227
10K 1/16W
R230
10K 1/16W
MSCL
MSDA
R231
10K 1/16W
EE_WP
R232
10K 1/16W
U204
8
NC
VCC
7
WC
6
SCL
VSSSDA
M24C04-WMN6TP
VCC3.3
0.1uF/ 16V
C226
R229
3.9K OHM 1/16W
C227
0.1uF/ 16V
0.1uF/ 16V
KEY1
KEY2
POWER_KEY #
LED_GRN/BLUE
LED_ORAN GE
C229
C228
0.1uF/ 16V
R228
CN201
CONN
R235 NC
VCC3. 3
C230
NC
VCC3. 3
C224
0.22uF16V
1
2
E1
3
E2
45
R236
NC
MSCL
MSDA
8
7
U201 NC
1
2
3456
3.9K OHM 1/16W
1
2
3
4
5
6
C225
0.1uF/ 16V
Near to Connect
HDCP Key EEPROM
T P V ( Top Victory Electronics Co . , Ltd. )
G2559-1-3-X-2-070719
线路图编号
Key Component
03.Scala r
Date
HP L1750/L1950 C
OEM MOD EL Size
TPV MOD EL
PCB NAME
715G2559-1-3
Sheet
of
35Thursday, J uly 19, 2007
-1-3
Rev
备注
备注
17
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