HP L1950 User manual

19" LCD Color Monitor HPL1950
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......…..................11
5. Panel Specification.....………………..................12
5.1. General Feature…….....………………..................12
5.2. Optical Characteristics………………………………14
6. Block Diagram……...................…………................16
6.1 Software Flow Chart………………………………...16
6.2.Electrical Block Diagram……………..….......18
7. Schematic……………......................................20
7.1 Main Board....……….......................................20
7.2 Power Board.….……....................................24
7.3 Key Board…………………………………………..28
7.4 USB Board…………………………………………29
8.PCB Layout..…….......................................30
8.1. Main Board………........................................30
8.2. Power Board….......................................32
8.3. Key Board………............….......................34
8.4 USB Board…………………………………………35
9. Maintainability……….......................................37
9.1. Equipments and Tools Requirement..............37
9.2. Trouble Shooting……….............................38
9.2.1 Main Board…………..............................38
9.2.2 Power Board………..............................40
9.2.3 Key Board…………..............................42
10 White-Balance, Luminance adjustment...43
11.Mechanical Instructions……………..…...….......45
12. Monitor Exploded View………………..…....….......51
13. BOM List………………………………..……………52
14. Different Parts List.........…………..........................66

19" LCD Color Monitor HPL1950
2
Revision List
Version Date Revision History TPV Model Name
A00 Aug.-06-2007 Initial release T97GMMDKHNHPQNE
A01 Aug.-10-2007 Add TPVDW Model in Item 14 T97HMMDKHNHPQNE
T97HMMDBHNHPQNE
A02 Sep.-04-2007 Add TPVDW Model in Item 14
T97GMMDBHNHPQNE
T97HMMDTHNHPQNE
A03 Sep.-14-2007 Add TPVDW Model in Item 14
T97HMMDLHNHPQNE
A04 Oct.-16-2007 Add TPVDW Model in Item 14 T97HMMDDHNHPQNE
A05 Oct.-24-2007 Add TPVDW Model in Item 14 T97AMMDBHNHPQNE
T97SMMDKHNHPQNE
A06 Oct.-29-2007 Add TPVDW Model in Item 14
T97SMMDBHNHPQNE
A07 Nov.-01-2007 Add TPVDW Model in Item 14 T97GMMDLHNHPQNE
A08 Nov.-09-2007 Add TPVDW Model in Item 14 T97HMMDQHNHPQNE
LM190E08-TLL1 LPL
LM190E08-TLG2/TLG4
LTM190EX-L31 QLC
M190EG02 V40B SZ
M190EG02 V400 SZ
HSD190MEN3-A00 WH
Add Second Panel list in Item 5
HSD190MEN3-A00 NJ
T97AMMDKHNHPQNE
A09 Dec.-12-2007
Add TPVDW Model in Item 14
T97AMMDQHNHPQNE
A10 Jan.-19-2008 Add TPVDW Model in Item 14 T97SMMDTHNHPQNE
A11 Jan.-22-2008 Update Power Board in Item 7 715G2655 2 2
T98HMMDKHNHP2NE
T97GMMDQHNHPQNE
T97GMMDTHNHPQNE
T97GMMDDHNHPQNE
T97GMMDKHNHPQ1E
T97GMMDBHNHPQ1E
A12 Nov.-05-2008 Add TPVDW Model in Item 14
T97GMMDKHNHPQCE

19" LCD Color Monitor HPL1950
3
1. Monitor Specification

19" LCD Color Monitor HPL1950
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 HPL1950
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 HPL1950
6
3.3 Adjust the Picture

19" LCD Color Monitor HPL1950
7

19" LCD Color Monitor HPL1950
8

19" LCD Color Monitor HPL1950
9

19" LCD Color Monitor HPL1950
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
4.1.2 DVI-D connector
Pin No.
Signal Name Pin No. Signal Name
1 TMDS Data 2- 13 TMDS Data 3+
2 TMDS Data 2+ 14 +5V Power
3 TMDS Data 2/4 Shield 15 Ground(for+5V)
4 TMDS Data 4- 16 Hot Plug Detect
5 TMDS Data 4+ 17 TMDS Data 0-
6 DDC Clock 18 TMDS Data 0+
7 DDC Data 19 TMDS Data 0/5 Shield
8 N.C. 20 TMDS Data 5-
9 TMDS Data 1- 21 TMDS Data 5+
10 TMDS Data 1+ 22 TMDS Clock Shield
11 TMDS Data 1/3 Shield 23 TMDS Clock +
12 TMDS Data 3- 24 TMDS Clock -
24 - Pin Color Display Signal Cable

19" LCD Color Monitor HPL1950
11
4.2 Factory Preset Display Modes

19" LCD Color Monitor HPL1950
12
5. Panel Specification
5.1 General Feature
LM190E08-TLL1 LPL/ LM190E08-TLG2/TLG4
LTM190EX-L31 QLC

19" LCD Color Monitor HPL1950
13
M190EG02 V40B SZ / M190EG02 V400 SZ
HSD190MEN3-A00 WH / HSD190MEN3-A00 NJ

19" LCD Color Monitor HPL1950
14
5.2 Optical Characteristics
LM190E08-TLL1 LPL/ LM190E08-TLG2/TLG4
LTM190EX-L31 QLC

19" LCD Color Monitor HPL1950
15
M190EG02 V40B SZ / M190EG02 V400 SZ
HSD190MEN3-A00 WH / HSD190MEN3-A00 NJ

19" LCD Color Monitor HPL1950
16
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 HPL1950
17
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 HPL1950
18
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)
DVI Connector
(CN102)
EEPROM
M24C02
(U101)
EEPROM
M24C02
(U102)
DB15_SDA,
DB15 SCL
SDA,
SCL
H sync
V sync
RGB
RGB
CLK+
CLK-
Crystal
X201
14.318Mhz

19" LCD Color Monitor HPL1950
19
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 HP L1950
20
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 MODE L
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