HP L1910 User manual

19" LCD Color Monitor HP L1910
1
Service
Service
Service
HorizontalFrequency
24-83kHz
TABLE OF CONTENTS
Description Page Description Page
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
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………………………………13
6. Block Diagram……...................…………................15
6.1 Software Flow Chart………………………………...15
6.2.Electrical Block Diagram……………..….......17
7. Schematic……………......................................19
7.1 Main Board....……….......................................19
7.2 Power Board.….……....................................23
7.3 Key Board…………………………………………..27
8.PCB Layout..…….......................................28
8.1. Main Board………........................................28
8.2. Power Board….......................................30
8.3. Key Board………............….......................32
9. Maintainability……….......................................33
9.1. Equipments and Tools Requirement..............33
9.2. Trouble Shooting……….............................34
9.2.1 Main Board…………..............................34
9.2.2 Power Board………..............................36
9.2.3 Key Board…………..............................38
10 White-Balance, Luminance adjustment...39
11.Mechanical Instructions……………..…...….......41
12. Monitor Exploded View………………..…....….......47
13. BOM List………………………………..……………48
14. Different Parts List.........…………..........................59

19" LCD Color Monitor HP L1910
2
Revision List
Version Date Revision History TPV Model Name
T97GMSDKHNHPNNE
A00 Sep.-21-2007 Initial release
T97HMSDKHNHPNNE
A01 Oct.-18-2007 Add TPVDW Model in Item 14 T97HMSDBHNHPNNE
A02 Oct.-22-2007 Add TPVDW Model in Item 14 T97SMSDBHNHPNNE
A03 Oct.-26-2007 Add TPVDW Model in Item 14 T97GMSDBHNHPNNE
A04 Nov.-01-2007 Add TPVDW Model in Item 14 T97SMSDLHNHPNNE
A05 Nov.-06-2007 Add TPVDW Model in Item 14 T97HMSDLHNHPNNE
T97HMSDKHNHPNNE
A06 Nov.-09-2007 Add TPVDW Model in Item 14
T97GMSDLHNHPNNE
A07 Nov.-16-2007 Add TPVDW Model in Item 14 T97SMSDKHNHPNNE
T97HMSDQHNHPNNE
A08 Nov.-23-2007 Add TPVDW Model in Item 14
T97GMSDTHNHPNNE
T97GMSDQHNHPNNE
A09 Dec.-03-2007 Add TPVDW Model in Item 14
T97HMSDTHNHPNNE
LM190E08-TLL1 LPL
LM190E08-TLG2/TLG4
LTM190EX-L31 QLC
M190EG02 V40B SZ
HSD190MEN3-A00 WH
Add Second Panel list in Item 5
HSD190MEN3-A00 NJ
T97AMSDKHNHPNNE
T97HMSDDHNHPNNE
A10 Dec.-12-2007
Add TPVDW Model in Item 14
T97SMSDDHNHPNNE
A11 Jan.-22-2008 Update Power Board in Item 7 715G2655 2 2
T97SMSDTHNHPNNE
T97GMSDDHNHPNNE
T97GMSDKHNHPN1E
T97GMSDDHNHPN1E
T97GMSDKHNHPNCE
T97GMSDLHNHPNCE
T97GMSDLHNHPN1E
T97GMSDTHNHPN1E
A12 Nov.-18-2008 Add TPVDW Model in Item 14
T97GMSDKHNHPN6E

19" LCD Color Monitor HP L1910
3
1. Monitor Specification

19" LCD Color Monitor HP L1910
4
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.
Video signal, DDC
Power Board
(
Include ada
p
ter board
)
Flat Panel and
CCFL backlight
Main Board RS232 Connector
For white balance
adjustment in
factory mode
HOST Computer
CCFT Drive.
AC-IN
110V-240V
Monitor Block Diagram
Keyboard

19" LCD Color Monitor HP L1910
5
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

19" LCD Color Monitor HP L1910
6
3.3 Adjust the Picture

19" LCD Color Monitor HP L1910
7

19" LCD Color Monitor HP L1910
8

19" LCD Color Monitor HP L1910
9

19" LCD Color Monitor HP L1910
10
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
VGA connector layout
PIN 1 PIN 5
PIN 11
4.2 Factory Preset Display Modes

19" LCD Color Monitor HP L1910
11
5. Panel Specification
5.1 General Feature
LM190E08-TLL1 LPL/ LM190E08-TLG2/TLG4
LTM190EX-L31 QLC

19" LCD Color Monitor HP L1910
12
M190EG02 V40B SZ
HSD190MEN3-A00 NJ / HSD190MEN3-A00 WH

19" LCD Color Monitor HP L1910
13
5.2 Optical Characteristics
LM190E08-TLL1 LPL/ LM190E08-TLG2/TLG4
LTM190EX-L31 QLC

19" LCD Color Monitor HP L1910
14
M190EG02 V40B SZ
HSD190MEN3-A00 WH / HSD190MEN3-A00 NJ

19" LCD Color Monitor HP L1910
15
6. Block diagram
6. 1 Software Flow Chart
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
15
Y
N
16
17
19
Y
N
18

19" LCD Color Monitor HP L1910
16
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?

19" LCD Color Monitor HP L1910
17
6.2 Electrical Block Diagram
6.2.1 Scalar Board
Scalar HUM56AWL-LF
(Include ADC、OSD、MCU)
(U401)
EEPROM
(U402)
D-Sub Connector
(CN101)
EPR_SDA
EPR SCL
Panel Interface
(CN401)
EEPROM
M24C02
(U101)
DB15_SDA,
DB15 SCL
H sync
V sync
RGB
Crystal
X201
14.318Mhz

19" LCD Color Monitor HP L1910
18
6.2.2 Inverter / Power Board
CN902
DIM
EMI filter Bridge
Rectifier
and Filter
Start Circuit
PWM
Control IC
Transformer Rectifier
diodes
AC input
12V
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
LC
Resonance
Transformer MOSFET
Over
Voltage
Lamp
ON/OFF
Feedback
Circuit
Over
Voltage
Protect
5V

19" LCD Color Monitor HPL1910
19
7. Schematic
7.1 Main Board
FB103
BEAD
1 2
DSUB_R- 2
R136 10R 1/16W
R131 10R 1/16W
D109
RLZ5.6B
-1-3
HP L1750/L1950 B
25Thursday , July 19, 2007
715G2559-1-3
备注
02 Input
G2559-1-3-X-2-070719
OEM MODEL Size
Rev
Date Sheet of
TPV MODEL
PCB NAME
备注
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
线路图编号
ZD104
RLZ5.6B
VGA_R-
DVI_HPD
VGA_G+
RX1N
R123 10K 1/16W
D111
BAV99
3
1 2
D114
BAV99
3
1 2
D104
BAV99
3
1 2
DSUB_5V
DSUB_H 2
DDC2_SDA
C111
5pF/50V
C118
0.1uF/16V
R134
4K7 1/16W
CMVCC
FB102
BEAD
1 2
R133 10R 1/16W
VGA_R-
D113
BAV99
3
1 2
D115
BAV99
3
1 2
R125
NC
R122 100R 1/16W
C103
22pF
DGND
VGA_PLUG
DDC1_SCL2
D107
RLZ5.6B
C102
22pF
VGA_B+
DDC2_SCL
RX2N
RX1P
VGA_G+
VGA_R+
C112
0.1uF/16V
DDC2_SDA
DDC1_SDA
R102 100R 1/16W
GND POWER
DSUB_V 2
D106
RLZ5.6B
RX2P 2
C101
0.047uF
R103 100R 1/16W
DSUB_R+ 2
CMVCC
RX0P
C114
0.1uF/16V
R113
100R 1/16W
HPD_CTRL 2
VGA_R+
DSUB_5V
R111 100R 1/16W
DSUB_B+ 2
C104
5pF/50V
RX2P
R129 10R 1/16W
R107
75R 1/16W
ZD102
RLZ5.6B
CN102 JACK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
26 25
DAT2-
DAT2+
2/4shield
DAT4-
DAT4+
DDC SCL
DDC SDA
VSY N C
DAT1-
DAT1+
1/3shield
DAT3-
DAT3+
+5V
SYNC GND
HPD
DAT0-
DAT0+
0/5shield
DAT5-
DAT5+
clk shield
clk+
clk-
GND GND
CMVCC
D101
BAV70
3
1 2
DVI_HPD
R121
4K7 1/16W
C108
5pF/50V
VGA_G-
R119 100R 1/16W
DSUB_5V
R137
10K 1/16W
DSUB_B- 2
RX0N
FB104
120OHM
12
RXCN 2
R118
10K 1/16W
D108
RLZ5.6B
R112
75R 1/16W
FB101
BEAD
1 2
VCC3.3
R127 10R 1/16W
D103
BAV99
3
1 2
DSUB_SOG 2
RXCN
R106
2K2 1/16W
DDC2_SCL
Q101
NC
VGA_B-
C116
0.1uF/16V
R126 10R 1/16W
RX1N 2
VGA_G+
C113
0.047uF
D110
BAV99
3
1 2
R117 100R 1/16W
R132
10K 1/16W
VGA_B+
R130 10R 1/16W
R120
4K7 1/16W
RX1P 2
C105
0.047uF
U101
M24C02-WMN6TP
1
2
3
45
6
7
8A0
A1
A2
VSSSDA
SCL
WP
VCC
RXCP
R114 100R 1/16W
CMVCC
RX2N 2
C107
0.047uF
CN101
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
17 16
R128 10R 1/16W
D117
BAV99
3
1 2
DDC_WP2
R110
100R 1/16W
U102
M24C02-WMN6TP
1
2
3
45
6
7
8A0
A1
A2
VSSSDA
SCL
WP
VCC
D112
BAV99
3
1 2
R105
2K2 1/16W
DDC1_SDA2
C117
0.1uF/16V
C110
0.047uF
VGA_B-
ZD105
RLZ5.6B
R101 0R05 1/16W
VGA_B+
D102
BAV99
3
1 2
R108 100R 1/16W
R135
4K7 1/16W
DSUB_G+ 2
R104 100R 1/16W
DET_CABLE 2
RX0N 2
DVI_5V
HOT_PLUG
R139 6K8 1/16W
RXCP 2
ZD106
RLZ5.6B
R124 NC
C115
0.1uF/16V
DDC1_SCL
VGA_G-
DDC2_SDA 2
D105
BAV70
3
1 2
DDC1_SCL
R116
75R 1/16W
DVI_5V
RX0P 2
DDC2_SCL 2
ZD101
RLZ5.6B
DDC_WP2
C119
0.1uF/16V
R138 10K 1/16W
R115 100R 1/16W
ZD103
RLZ5.6B
C109
0.047uF
VGA_R+
DDC1_SDA
VGA_PLUG
D116
BAV99
3
1 2
R109 470R 1/16W
DSUB_G- 2
C106
1000pF

19" LCD Color Monitor HPL1910
20
EE_WP
C201
0.1uF/16V
PB7
Q205
NC
32
1
DDC_WP 1
C230
NC
on_BACKLIGHT 4
R211 10K 1/16W
R202
22K 1/16W
RXCN1
Volume# 4
PA0
PA2
C226
0.1uF/16V
C204
0.1uF/16V
VDD C
PANEL_VCC
U204
M24C04-WMN6TP
1
2
3
45
6
7
8NC
E1
E2
VSSSDA
SCL
WC
VCC
AVDD
adj_BACKLIGHT 4
LED_GRN/BLUE
PA[0..9]
R208
6K8 1/16W
R229
3.9K OHM 1/16W
KEY 1
VDDP
DSUB_SOG1
PB8
PA1
R226
10K 1/16W
R207 100R 1/16W
AVDD
CN201
CONN
1
2
3
4
5
6
VDVI
R236
NC
POWER_KEY #
C224
0.22uF16V
VCC 3.3
C210
0.1uF/16V
VCC 3.3
HPD_CTRL 1
LED_ORANGE
C214
0.1uF/16V
PA5
PA8
+
C202
10uF/50V
R219
100K 1/ 16W
U201 NC
1
2
3
45
6
7
8
KEY 1
MSC L
R220 NC
R21010K 1/16W
R231
10K 1/16W
C211
0.1uF/16V
R214 100R 1/16W
PA3
KEY 2
VCC3.3
DSUB_B-1
PB4
C231
0.1uF/16V
FB201
300OHM
C223 0.1uF/16V
VCC 3.31
LED_GRN/BLUE
R217 4K7 1/16W
R228
3.9K OH M 1/16W
PB0
RX1N1
R224 100R 1/16W
R215 100R 1/16W
+
C209
NC
FB206
0R05 1/8W
R205
10K 1/16W
C206
0.1uF/16V
RX0N1
R233
6K8 1/16W
POWER_KEY #
C203
0.1uF/16V
change C221 from
22pf to 33pf
Change C222 from
22pf to 27pf
DSUB_V1
PB1
R222 100R 1/16W
DSUB_G-1
LED_ORANGE
HDCP Key EEPROM
VCC 3.3
WP
PA4
VDVI
PA9
PB9
RXCP1
R235 NC
R230
10K 1/16W
DDC2_SCL1
FB203
300OHM
RX1P1
PB[0..9]
C219
0.1uF/16V
DDC1_SDA1
EE_WP
VCC 3.3
VCC 3.3
PA7
HUM56AWL-LF
U401
23
20
21
18
22
19
17
27
28
15
26
25
37
39
38
40
47
86
59
96
97
60
61
62
63
64
65
67
68
69
70
71
72
73
74
77
78
58
55
54
2 5
3
4
6
7
8
9
10
12
13
11 29 33
24 56
53
52
81
51
30
31
100
1
93
14 75
35
48
85
88
89
90
91
92
94
95
99
43
44
84
41
42
98 16 32 49 66 82 34
50 57 76 79 83
80
87
36
45
46
RIN0P
GIN 0P
SOGIN0
BIN0P
RIN0M
GIN 0M
BIN0M
HSYNC0
VSY NC 0
REXT
REFP
REFM
SDO
SCK
SCZ
SDI
PWM2/GPIO_P24
PWM1/GPIO_P25
LVACKM
XI N
XO U T
LVA2P
LVA2M
LVA1P
LVA1M
LVA0P
LVA0M
LVB3P
LVB3M
LVBCKP
LVBCKM
LVB2P
LVB2M
LVB1P
LVB1M
LVB0P
LVB0M
LVACKP
LVA3M
LVA3P
GND GND
R+
R-
G+
G-
AVDD_DVI
B+
B-
CK+
CK-
GND GND GND
AVDD_ADC
VDDP
MOD E [ 1]
MOD E [ 0]
VCTRL
VDDC
DD CA_SD A/R S232_TX
DDCA_SCL/rs232_RX
DDCD_SDA
DDCD_SCL
PWM0/GPIO_P26
AVDD_DVI
VDDP
GPIO_P15/PWM0
GPIO_P27/PWM1
GPIO_P12
GPIO_P00/SAR1
GPIO_P01/SAR2
GPIO_P02/SAR3
GPIO_P06
GPIO_P07
GPIO_P13
GPIO_P14
GPIO_P16/PWM2
GPIO_P11/I2C_MDA
GPIO_P10/I2C_MCL
RST
GPIO_P23
GPIO_P22
AVDD_MPLL
AVDD_PLL
VDDP VDDP
VDDC VDDC VDDC
GND GND GND GND GND
BY PASS
RSTN
NC
NC
NC
C215
0.1uF/16V
VCC 1.84
CMVCC
C208
0.1uF/16V
VPLL
DSUB_R+1
C227
0.1uF/16V
R212 75R 1/16W
VCC 3.3
R203
10K 1/ 16W
R232
10K 1/16W
R213 100R 1/16W
PB5
VDD P
MSC L
FB205
0R05 1/8W
DSUB_B+1
FB204
300OHM
PA6
DSUB_R-1
PB6
RX0P1
X201
14.31818MHz
1 2
MSC L
R218 4K7 1/16W
C207
0.1uF/16V
MSD A
Q203
2N3906S-RTK/PS
R209
10K 1/16W
CMVCC
R221 NC
DDC1_SCL1
R227
10K 1/16W
C205
0.1uF/16V
MSD A
Near to Connect
-1-3
HP L1750/L1950 C
35Thursday , July 19, 2007
715G2559-1-3
备注
03.Scalar
G2559-1-3-X-2-070719
OE M MOD EL Si ze
Rev
Date Sheet of
TPV MOD E L
PCB N AME
备注
T P V ( Top Victory Electronics Co . , Ltd. )
Key Component
线路图编号
C217
0.1uF/16V
Q201
2N3904S-RTK/PS
Q202
2N3906S-RTK/PS
AVDD
VCC3.3
PB3
RX2N1
VPLL
KEY 2
VCC 3.3
DSUB_H1
R216 56 OHM 1/ 16W
C218
0.22uF16V
+
C220
10uF/50V
VCC 1.8
C222 27pF 50V
VCC 3.3
PA[0..9] 3
VDD C
DDC2_SDA1
R234 10K 1/16W
LVDS
VCC3.3
C216
0.1uF/16V
VMPLL
MSD A
RX2P1
WP
C221 33pF
DSUB_G+1
C229
0.1uF/16V
PPWR _ON#3
PB2
C225
0.1uF/16V
DET_CABLE 1
PB[0..9] 3
R201 0R05 1/16W
C228
0.1uF/16V
U402
PM25LV010A
1
2
3
4 5
6
7
8
CE
SO
WP#
GND SI
SCK
HOLD#
VCC
VCC 3.3
Mut e 4
R204 390 OH M 1/16W
R223 10K 1/16W
VMPLL
C212
0.1uF/16V
R225 100R 1/16W
C213
0.1uF/16V