HP L1740 User manual

17" LCD Color Monitor HP L1740
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............……………............7
4.1. Input Signal Connector............………….................7
4.2. Factory Preset Display Modes......…..................8
4.3. Power Supply Requirements...............................8
5. Panel Specification.....………………..................9
5.1. General Feature…….....………………..................9
5.2. Optical Characteristics………………………………9
6. Block Diagram……...................…………................10
6.1 Software Flow Chart………………………………...10
6.2.Electrical Block Diagram……………..….......12
7. Schematic……………......................................14
7.1 Main Board....……….......................................14
7.2 Power Board.….……....................................18
8.PCB Layout..…….......................................20
8.1. Main Board………........................................20
8.2. Power Board….......................................23
8.3. Key Board………............….......................26
9. Maintainability……….......................................27
9.1. Equipments and Tools Requirement..............27
9.2. Trouble Shooting………..............................28
9.2.1 Main Board…………..............................28
9.2.2 Power Board………..............................30
9.2.3 Key Board…………..............................32
10 White-Balance, Luminance adjustment...33
11.Mechanical Instructions……………..…...….......35
12. Monitor Exploded View………………..…....….......39
13. BOM List………………………………..……………40
14. Different Parts List…....................................54

17" LCD Color Monitor HP L1740
2
Revision List
Version Date Revision History TPV Model Name
T77GNNDKCKHFQE
A00 Mar.-20-2007 Initial release
T77CNNDKCKHFQE
T77ANNDKCKHFQE
A01 Apr.-06-2007 Add TPVDW Model in Item 14
T76CNNDBCKHPQE
A02 May.-23-2007
1.Update Layout and BOM
2.Add TPVDW Model in Item 14 T77CNNDBCKHFQE

17" LCD Color Monitor HP L1740
3
1. Monitor Specification

17" LCD Color Monitor HP L1740
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

17" LCD Color Monitor HP L1740
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

17" LCD Color Monitor HP L1740
6
3.3 Adjust the Picture
1. If the monitor is not already on, press the Power switch to turn on the monitor.
2. Press the Menu button on the monitor’s front panel to launch the OSD Main Menu.
3. To navigate through the OSD Menu, press the + (Plus) buttonon the monitor’s front panel to scroll up, or the – (Minus)
button to scroll in reverse.
4. To select an item from the OSD Menu, use the + or – buttons to scroll to and highlight your selection, then press the
Menu button to select that function.
5. Adjust the item using the + or – buttons on the front panel to adjust the scale.
6. After adjusting the function, select Save and Return, or Cancel if you don’t want to save the setting, then select Exit
from the Main Menu.

17" LCD Color Monitor HP L1740
7
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
PI N NO. DESCRIPTION PI N NO. DESCRIPTION
1. TMDS data 2－13. TMDS data 3＋
2. TMDS data 2＋14. ＋5V Power
3. TMDS data 2/4 Shield 15. GND(return for +5v,hsync,vsync)
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. Analog Vertical Sync 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

17" LCD Color Monitor HP L1740
8
4.2 Factory Preset Display Modes
4.3 Power Supply Requirements
Parameter Range
AC Input Voltage 90 to 265V
AC Input Frequency 45 to 63 Hz
Inrush Current 50A MAX AT 220VAC and 30A AT 120VAC
Leakage Current 5 mA MAX at 120VAC
Power Consumption ≤37W

17" LCD Color Monitor HP L1740
9
5. Panel Specification
5.1 General Feature
5.2 Optical Characteristics

17" LCD Color Monitor HP L1740
10
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

17" LCD Color Monitor HP L1740
11
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?

17" LCD Color Monitor HP L1740
12
6.2 Electrical Block Diagram
6.2.1 Scalar Board
LCD interface
(
CN302
)
Scalar NT68663MEFG-128
(Include MCU, ADC, OSD)
(
U401
)
D-Sub
Connector
(CN201)
H sync
V sync
RGB
Crystal (12.000MHz)
(
Y301
)
EEPROM
M24C02
(U403)
EEPROM
M24C16
(U302)
DVID
Connector
(CN202)
RGB
DCLK+
DCLK-
EEPROM
M24C02
(U402)

17" LCD Color Monitor HP L1740
13
6.2.2 Inverter / Power Board
DIM
EMI filter Bridge
Rectifier
and Filter
Start Circuit
PWM
Control IC
G
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

17" LCD Color Monitor HP L1740
14
7. Schematic
7.1 Main Board
R243
2.2KΩ1/10W
220pF
C234
R234
2.2KΩ1/10W
C229
0.1uF 50V
R232
100Ω1/10W
U201D
74LCX14T
9 8
R239
100Ω1/10W
R207
10KΩ1/10W
VSIN 3
HSIN 3
R213
NC
C228
0.1uF 50V
GND
GND
U201E
74LCX14T
11 10
DVI-SCL 3
DVI-SDA 3
5/16 ADD C226
for ESD
U201C
74LCX14T
5 6
14
7
D215
BAV70
3
1
2
R214 100Ω1/ 10W
VGA_5V
DDC-VGA-SCL
R244
NC
DDC_W_A3100Ω1/10WR241
DDC-VGA-SDA
C233
0.22uF
U201F
74LCX14T
13 12
75-ohm ter minating res istor
very close to the V GA
conn.
(10 mil, ┰キ︽絬 )
FB202
120Ω
1 2
GND
DVI _5V
GND
100Ω1/10WR242
D203
BAV70
3
1
2
GND
ZD204
MM3Z 5V6B
Close to Scalar IC
GND
+5V
FB206
120Ω
1 2
BIN 3
+3. 3V
C230
0.1uF 50V
R212 0Ω1/ 10W
UVCC
GND
R216 NC
GND
C209
NC
R233
0Ω1/10W
R240
0Ω1/10W
R201
NC
C210
NC
U201A
74LCX14T
1 2
C202
0.1uF 50V
C211
NC
HS
GND GN D GND
C212
NC
+3. 3V
GND
GND
GND
R208
NC
GND
CN201
DB15
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
1716
C213
NC
Gin1
ZD207
MM3Z 5V6 B
C231
33pF
C214
NC
R227
NC
GND
R228
NC
D207
NC
3
1 2
ZD 203
MM3Z5V6B
D210
NC
3
1 2
C208
NC
FB203
30 OHM
1 2
D206
NC
3
1 2
ZD202
MM3Z5V6B
D204
NC
3
1 2
D209
NC
3
1 2
R229
NC
D208
NC
3
1 2
D205
NC
3
1 2
D211
NC
3
1 2
FB205
30 OHM
1 2
FB201
30 OHM
1 2
CN202
DVI-D-Female
TX2- 1
TX2+ 2
TX2/ 4 Shld 3
TX4- 4
TX4+ 5
DDC CLK 6
DDC DATA 7
A VS 8
TX1- 9
TX1+ 10
TX1/ 3 Shld 11
TX3- 12
TX3+ 13
+5V 14
GND 15
HP Detect 16
TX0- 17
TX0+ 18
TX0/ 5 Shld 19
TX5- 20
TX5+ 21
TXC Shld 22
TXC+ 23
TXC- 24
SHELL1
31
SHELL2
32
AR C1
AG C2
AB C3
AHS C4
AGND C5
NC C6
C207
NC
DVI_5V
RX0- 3
RXC- 3
RX1- 3
RX0+ 3
RXC+ 3
RX1+ 3
RX2+ 3
RX2- 3
ISPSCL3DDC-VGA-SCL
R224
75 OHM +-1% 1/10W
VGA_CABLE 3
DVI_CABLE 3
C206
0.1uF 50V
R211 10KΩ1/ 10W
R223
10KΩ1/10W
R236
10KΩ1/10W
R237
10KΩ1/10W
R219
100Ω1/10W
ISPSDA3DDC-VGA-SDA
R238
4.7KΩ1/10W
ZD208
MM3Z 5V6 B
100Ω1/10WR203
100Ω1/10WR202
C216
0.1uF 50V
DDC-DVI-SCL
DDC-DVI-SDA
D201
BAV99
3
1 2
Bin1
R222
100Ω1/10W
R225
75 OHM +-1% 1/10W
C217
0.1uF 50V
D212
BAV99
3
1 2
ZD206MM3Z5V6B
R226
75 OHM +-1% 1/10W
C215
0.1uF 50V
ZD201MM3Z5V6B
FB204
120Ω
1 2
D213
BAV99
3
1 2
GND
GND
VGA_5V
GND
+3.3V
GND
GND
GNDB 3
GNDG 3
GIN 3
RIN 3
GNDR 3
GND
GND GN D
GND
GND
GND
GND
R215 100Ω1/ 10W
C221 NC
C219
NC
U403
M24C02-WMN6TP
A0 1
A1 2
A2 3
VSS 4 SDA
5SCL
6WP
7VCC
8
C223
NC
R217 100Ω1/ 10W
R218 100Ω1/ 10W
R220 100Ω1/ 10W
R221 100Ω1/ 10W
C226
NC
C218 0.1uF 50V
C220 0.1uF 50V
C222 0.1uF 50V
C224 0.1uF 50V
C225 0.1uF 50V
C227 0.1uF 50V
+5V
100Ω1/10WR209
DDC-DVI-SCL
GNDGND
GND
DDC-DVI-SDA
C201
33pF
DDC_W_D3
+3.3V
100Ω1/10WR210
C205
33pF
R206
10KΩ1/10W
U402
M24C02-WMN6 TP
A0 1
A1 2
A2 3
VSS 4 SDA
5SCL
6WP
7VCC
8
Rin1
ZD205
MM3Z5V6B
GND
SOG 3
R205
10KΩ1/10W
+3.3V
R231
NC
R230
NC
DVI Input
GND
C204
0.22uF
Tit le
Size Docum ent Number Rev
Dat e: S heet of
G1864-1A-HP-X-1-070116
1
Signal Input
C
25Tuesday , Januar y 16, 2007
U201B
74LCX14T
3 4
HS
GND
VS
GND
VS

17" LCD Color Monitor HP L1740
15
R336 NC
CN304
NC
1
2
3
CN303
NC
1
2
3
4
82
89
ADC_VAA
FB302
120Ω
99
112 120
24C16_WP
VSO
R329
4.7KΩ1/10W
HSO
110
14
FB303
120Ω
RX
TX
+3.3VDD
+1.8VDD
FB305
120Ω
TXO3+
TXE3+
TXEC+
TXE1-
TXE3-
TXEC-
TXE0-
TXE2+
TXE0+
TXE2-
TXOC+
TXOC-
TXE1+
R303
0Ω1/10W
TXO2+
R302
0Ω1/10W
16CSCL
TXO0-
TXO2-
TXO3-
TXO1+
TXO1-
FB307
120Ω
TXO0+
IICSDA
CN301
NC
2
4
6
8
10
12
14
16
18
20
22
24
1
3
5
7
9
11
13
15
17
19
21
23
+1.8VDD
8P-DIP TYPE
w/ SOCKET
+3.3VDD
RSTN
Aug.-25-06 change to dip
VGA_CABLE 2
R339 NC
GND
IICSDA
IRQN
IICSCL
RSTN
Tit le
Size Document Number Rev
Date: Sheet of
G1864-1A-HP-X-1-070116
1
Scaler
Custom
35Tuesday , January 16, 2007
15
C318
0.22uF
R330
4.7KΩ1/10W
FB301
120Ω
R307
100Ω1/10W
C313
0.1uF 50V
R332
4.7KΩ1/10W
R318 100Ω1/10W
C322
22pF50V
108
IICSCL
U401
NT68663MEFG-128
PC3/PW M0 39
PA1/PWM3 46
PA2/PWM4 47
PA5/PWM7* 50
PA6/PWM8* 51
PA7/PWM9* 52
RSTB 53
P30/RXD 54
PC2 40
PA3/PWM5 48
PA4/PWM6* 49
PE0
17
PE1
18
OSCO
19
OSCI
20
MCU_GND
21
PB0/ADC 0
22
PB1/ADC 1
23
PB4/DDC_SCL0*
24
PB5/DDC_SDA0*
25
PB6/DDC_SCL1*
26
PB7/DDC_SDA1*
27
PD5
28
PD4
29
PD3
30
NC
31
NC
32
PD2
33
PD1
34
PC7
35
PC6
36
PC5
37
PC4/PW M1
38
VSYNCI0
6
DPLL_GND
7
TCLK
8
DPLL_VDD
9
PWM 11
11
TS_CLK
12
PD6 55
P31/TXD 56
PB2/ADC 2/INTE0 57
PB3/ADC 3/INTE1 58
P34/T0 59
P35/T1 60
T4P 69
T4M 70
DGND 71
T3P 72
T3M 73
T2P 76
TCLK1P 74
T2M 77
T1P 78
T1M 79
T0P 80
T0M 81
DVDD 82
DGND 83
GPO1 84
GPO2/AD0 85 GPO3/AD1 86
AGND 96
RX2+ 97
PGND
111
TEST
1
VREF
2
HSYNCI1
3
TOUT P/VSYNCI1
4
HYNCI0
5
PWM 10
10
CGND
13
CVDD
14
DGND
16
DVDD
15
PC1* 41
PC0* 42
MCU_V CC 43
PD0 44
PA0/PWM2 45
T7P 61
T7M 62
TCLK2P 63
TCLK2M 64
T6P 65
T6M 66
T5P 67
T5M 68
TCLK1M 75
INT _VSO/GPO4 87
INT _HSO/GPO5 88
CVDD 89
CGND 90
GPO6 91
SCL 92
SDA 93
RSTN 94
IRQN 95
RX2- 98
AVCC 99
RX1+ 100
RX1- 101
RX0+
103
AGND 102
RX0-
104
PVCC
110
REXT
109
AVCC
108
RXC-
107
RXC+
106
AGND
105
GIN1-
117
GIN1+
116
SOGI1
115
BIN1-
114
BIN1+
113
ADC_VAA
112
RIN1+
118
RIN1-
119
ADC_VAA
120
ADC_GNDA
121
BIN0+
122
SOGI0
124
BIN0-
123
GIN0-
126
GIN0+
125
RIN0-
128
RIN0+
127
C308
NC
Y301
12.000MHz
C306
0.1uF 50V
R322
4.7KΩ1/10W
R327
4.7KΩ1/10W
C311
0.1uF 50V
C323
10uF/16V
R305 100Ω1/10W
C317
0.1uF 50V
R320
NC
R321
4.7KΩ1/10W
C305
10uF/16V
R315
4.7KΩ1/10W
C304
0.1uF 50V
C302
10uF/16V
C310
0.1uF 50V
R324
1MΩ1/10W
R319
100Ω1/10W
R328
NC
R326
100Ω1/10W
FB304
120Ω
R331
4.7KΩ1/10W
C321
3.3pF
+
C324
470uF/16V
TX IICSDA
R306 390Ω1/10W
FB306
1000OHM
C309
0.1uF 50V
RX
R325
100Ω1/10W
R304 100Ω1/10W
IICSCL
C303
0.1uF 50V
C314
0.1uF 50V
C316
10uF/16V
IICSDA
U302
M24C 16
NC
1
NC
2
NC
3
VSS
4SDA 5
SCL 6
WC 7
VCC 8
R316
4.7KΩ1/10W
C320
0.1uF 50V
C312
10uF/16V
+3. 3V
C307
0.1uF 50V
+1.8 VCC
DVI_AVCC
DVI_AVCC
MCU_VDD
MCU_VDD
DVI_AVCC
+1.8VDD
DVI_PVCC
+3.3 VDD
TODEBUG
MCU_VDD
ADC_VAA
TO RS232
+3.3VDD
R310 100Ω1/10W
MCU_VDD
+3. 3V
+3.3V
+1.8VCC
PANEL_IDX 4
BL_CONTROL 4
TXO2-
TXO3-
RX1-2
TXO2+
TXO1+
LED_G 4
RX2+2
HSIN2
TXE1-
ISPSCL 2
TXO0-
ISPSDA 2
DVI-SDA 2
RXC+2
TXE3+
DVI-SCL 2
TXOC +
TXE2-
RX1+2
TXO1-
TXO0+
TXEC +
RX0+2
VSIN2
TXO3+
RXC-2
LED_R 4
TXE3-
TXE0+
TXEC -
RX2-2
TXE0-
PANEL_PWR 4
TXOC -
TXE1+
RX0-2
R309 100Ω1/10W
TXE2+
CUT_A 4
16CSDA
BRIGHTNESS 4
DDC_W_D 2
DDC_W_A 2
SOG2
BIN2
GNDR2
GNDB2
GIN2
GNDG2
RIN2
DVI_CABLE 2
K_AUTO 4
KEY1 4
R308 100Ω1/10W
PANEL_VCC
C301
NC
'05-12-01
Change from port1 to port0
IICSCL
R313 100Ω1/10W DC_SW 4
C315
NC
+3.3 V
PANEL_VCCPANEL_VCC GN D GND
R333
100Ω1/10W
24C16_WP
C325
100pF
MCU _V DD
MCU _V DD
TXE1-
TXEC-
TXO3-
TXO0-
TXE3-
TXO2-
TXE2-
TXO1-
TXE0-
TXOC- TXOC +
R335
47KΩ1/10W
TXE2+
TXO0+
R334 10KΩ1/10W
MCU_VDD
TXO1+
TXE0+
TXO3+
TXO2+
TXEC+
TXE1+
TXE3+
Ref Des Reserved
60952
2422025055721412
222224119876
10u
2422 10u
2222241198762408
TL431ACD
3198010704907402
+5V
2238786156492307 100n
10u
2238786156492313
2122118056693304 10K
3311 10K 232270260103
CN302
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
+3.3V
C319
3.3pF
R323
100Ω1/10W
HSO
VSO
IRQN
DVI_AVCC
DVI_PVCC
R338 NC

17" LCD Color Monitor HP L1740
16
CUT_A 3
NC
NC
C402
NC
Tit le
Size Document Number Rev
Date: Sheet of
G1864-1A-HP-X-1-070116
1
Power and Control board
B
45Tuesday , January 16, 2007
+5V
CN401
CONN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
R409
NC
FB402 NC
CUT_A
Q401
2N3906S-R TK/PS
R403
47Ω1/10W
BRIGHTNESS
R404
0Ω1/10W
BL_CONTROL
R405
47Ω1/10W
R412
0 OHM +-5% 1/4W
Q404
2N3906S-RTK/PS
R407
0Ω1/10W
R408
10KΩ1/10W
PANEL_IDX
C407
0.1uF 50V
C406
0.1uF 50V
Aug.-25-06 modify cancel (12->5v) add (5v->3.3v)
Q403
PMBS3904
R402
0Ω1/10W
PANEL_IDX 3
BL_CONTROL 3
BRIGHTNESS 3
Q402
AO3401
+ C436
10uF/ 50V
C435
0.1uF 50V
+3. 3V-U
+
C439
470uF/ 25V
C438
0.1uF 50V
+3.3V
U204
VI
3VO 2
GND
1
U203
VI
3VO 2
GND
1
+ C434
100uF/ 50V
+ C437
100uF/ 50V
R432
10KΩ1/10W
CONNECTOR FOR
POWER/INVERTER
BOARD 2.0 mm
R420
10KΩ1/10W
LED_RED
LED_GR EEN
LED_GR EEN
K_AUTO
R424
0Ω1/10W
+5V
LED_RED
R427
NC
R425
0Ω1/10W
R426
NC
+5V+3.3V
C423
0.1uF 50V
C424
0.1uF 50V
R415
10KΩ1/10W
C425
0.1uF 50V
C426
0.1uF 50V
C427
0.1uF 50V
+3.3V
LED_G
R419 1. 8KΩ1/10W
LED_R
R421 1. 8KΩ1/10W
Key pad and LED control
+3. 3V
R416
10KΩ1/10W
R422 1. 8KΩ1/10W
K_AUTO 3
LED_G 3
LED_R 3
DC_SW 3
KEY 1 3
R428 10KΩ1/10W
CN402
CONN
1
2
3
4
5
6
7
R430 10KΩ1/10W
R429 220Ω1/10W
R431 220Ω1/10W
DC_SW
R417
10KΩ1/10W
KEY1
U202
AZ1117D -1.8-E1
ADJ /GN D
1OUTPUT 2INPUT 3
C431
0.1uF 50V
C428
10uF/ 16V
+
C429
10uF/ 50V
C430
0.1uF 50V
+1. 8VC C+3. 3V
FOR 1.8V POWER USE
C432
NC
+
C413
NC
C433
NC
FB406
120Ω
PANEL_VCC
C420
0.1uF 50V
+5V
R418
100KΩ1/10W
Panel VDD control
+ C421
10uF/ 50V
C422
0.1uF 50V
R414
100KΩ1/10W
FB405
120Ω
R423
NC
+ C418
NC
PANEL_PW R3C419
0.033uF

17" LCD Color Monitor HP L1740
17
C516
12PF 50V
GND_U
C520
0.1uF 50V
C5040.1uF 50V
L502
120Ω
1 2
C519
0.1uF 50V
Y501
24.0MHz
1 2
R52015KΩ1/10W
C5050.1uF 50V
R52215KΩ1/10W
GND_U
R512
100KΩ1/10W
R52115KΩ1/10W
R514 15KΩ1/10W R515 15KΩ1/10W
R501
NC
C515
12PF 50V
C501
0.1uF 50V
R516 15KΩ1/10W
R511
15KΩ1/10W
GND_U
D501
LL4148
SPISCK
GND_U
R513 15KΩ1/10W
C502
NC
C503
10uF/ 16V
Q501
NC
GND_U
SPICS
UPSTREAM_VVCC
USB3V3
USB3V3
+3. 3V-U
+3.3V-U
USB3V3
USB3V3
UPSTREAM_V
USB3V3
USB3V3
USB3V3
DP0
DP2
DP1
DM0
DM2
DM1
GND _U
U501
CY 7C 65630-56LF XC U501
<Pin Names Rotate>
<Pin Names Vis ible>
<Pin Numbers Visible>
AMBER#[1] 36
SPI_SCK 48
VCC7 27
SPI_SD 49
GREEN #[2] 37
VCC4 15
AMBER#[2] 38
VCC5 19
GND 5
20
GND 6
24
PWR #[1] 29
GND 2
8
XIN 21
XOUT 22
GREEN #[1] 35
OVR#[1] 30
PWR #[2] 31
OVR#[2] 32
PWR #[3] 54
OVR#[3] 53
PWR #[4] 52
OVR#[4] 51
D+
18 D-
17
BUSPOWER
26
RESET#
46
VCC1 3
SPI _CS 25
GND
47
VCC3 11 VCC6 23
GND 4
16
GND 7
28
GND 3
12 VCC2 7
GND 1
4
GND 8
34
GND 9
40
GND 10
50
GND 11
56
VCC8 33 VCC9 39
SELFPWR 45
VCC10 55
AMBER#[3] 42
AMBER#[4] 44
GREEN #[3] 41
GREEN #[4] 43
DD-[1]
13
DD-[2]
9
DD-[3]
5
DD-[4]
1
DD+[1]
14
DD+[2]
10
DD+[3]
6
DD+[4]
2
R524
0 OHM +-5% 1/4W
R503
NC
OVR1
SPISD
OVR2
C523
0.22uF
Q502
NC
FB503 NC
'05-12-07 ADD FB506
SPICS
+
C517
10uF/ 50V
+
C521
10uF/ 50V
R510 0Ω1/10W
R509 0Ω1/10W
GND_U
L503
4
1
3
2
L501
4
1
3
2
L504
4
1
3
2
1234
5678
CN501
CONNNECTOR
1 2 3 4
6 5 7 8
11
12
9
10
t
F501
PTCR
1 2
GND _UGND _U
GND _UGND _U
t
F502
PTCR
1 2
OVR2
FB506
120Ω
1 2
U502
AT25040AN-10SU-2.7
CS
1
SO
2
WP
3
GND
4SI 5
SCK 6
HOLD 7
VCC 8
FB501
120Ω
1 2
+3. 3V-U
+5V
C5080.1uF 50V C5070.1uF 50V
12
34
CN502
CONNNECTOR
1
2
3
4
6 5
C5100.1uF 50V C5090.1uF 50V C5110.1uF 50V C5120.1uF 50V C5130.1uF 50V C5140.1uF 50V C5060.1uF 50V
R517 0Ω1/10W
R507 0Ω1/ 10W
R508 0Ω1/ 10W
DP0
DM0
R518 0Ω1/10W
DP0
DM0
R502 0Ω1/10W
SPISCK
R504 0Ω1/10W
R506 15KΩ1/10W
DM2
DM1
DP2
DP1
R505 15KΩ1/10W
SPISD
C518
0.1uF 50V
FB504
120Ω
1 2
VCC
USB3V3
GND_U
GND_U
DM2
DP2
FB502 NC
1 2
SPISD
GND_U
GND_U
GND_U
UPSTREAM_V
GND_U
R519 0Ω1/10W
GND_U
OVR4
OVR1
OVR3
GND_U
DM1
DP1
R523 0Ω1/10W
Aug.-25-06 modifychangeS15441DC to A03401L
C522
0.1uF 50V
VCC FB505
120Ω
1 2
GND_U
GND_U
Tit le
Size Document N umber Rev
Dat e: Sheet of
G1864-1A-HP-X-1-070116
1
USB HUB 200WP7
B
55Tuesday , January 16, 2007

17" LCD Color Monitor HP L1740
18
7.2 Power Board
CN833
CONN
1
2
U811
OZ9938GN
DRV1
1
VDDA
2
TI MER
3
DIM
4
ISEN
5
VSEN
6
OVPT
7
NC1
8NC2 9
ENA 10
LCT 11
SSTCMP 12
CT 13
GNDA 14
DRV2 15
PGND 16
C840
470uF/ 25V
Q885
2N7002 1
32
R812
620K
12
C802
3PF 3KV
12
C880
0.1uF /25V
R843
10R
12
D851
BAV99
3
1 2
R801
10K
12
C801
10pF/ 6KV
12
C883
0.01uF
PT802
24:24:2400
7
1
3
85
6
2
4
C846
1uF
12
R873
2K 1/10W
C865
33nF
12
R815
30K
TPV 2n7002
Q871
2N7002
1
32
C808
JUMP
12
Q801
2N7002
1
32
R872
100K
1 2
R881
100K 1/10W
12
OP3
R833
1.2K
C803
JUMP
12
C885
0.01uF
C811
1uF
12
CN851
CONN
1
2
D833
BAV70/SOT23B
3
1
2
R803
10K/NC
12
R863
33K 1/4W
12
R837
7.5K_1%
12
C874
1uF
12
BRIGHTNESS
R824
7.5K_1%_NC
1 2
R813
33K_1%
R849
0 1/10W
1 2
C806
10pF/ 6KV
12
Q880
2N7002 1
32
C838
1000pF
C887
0.01uF
C805
5pF/ 3KV_NC
12
C819
0.01uF/25V
12
D853
BAV70/SOT23B
3
1
2
ZD874
RLZ5.6B
1 2
C830
1000pF/NC
R866
100K/NC
12
OP3
C812
0.1uF
12
R807
10K
12
R874
330 1/10W
1 2
R857
7.5K_NC
R880
10K 1/10W
12
OP1
C821
1uF
12
R830
10K_1%_NC
12
R851
1K
R883
100K 1/10W
12
C822
0.001uF
1 2
C804
5pF/ 3KV_NC
12
R885
100K 1/10W
12
R859
6.2M 1/2W
12
R816
20K
R834
6.2M 1/2W_NC
12
C858
390pF
C826
0.01uF /NC
R836
10K_1%
12
R887
100K 1/10W
12
Q874
2N3904
32
1
OP4
R853
1.2K
Q821
AM9945N
S1
1
G1
2
S2
3
G2
4D2 5
D2 6
D1 7
D1 8
CN831
CONN
1
2
C841
1uF
12
D881
IN 4148
Q886
2N7002 1
32
R829
0 1/10W
R856
10K_1%
12
Q873
PDTA144EU
3 1
2
C832
0.1uF
12
R882
1K 1/10W
12
C860
220pF
12
R802
100K
1 2
CN853
CONN
1
2
R835
10K_1%
1 2
C871
0.1uF _NC
C861
1000pF
12
R822
10R
12
R884
1K 1/10W
12
R854
6.2M_NC
12
R850
10K_NC
12
R819
1M
D831
BAV99
3
1 2
R865
232R
R886
1K 1/10W
12
C823
0.001uF
1 2
Q841
AM9945N
S1
1
G1
2
S2
3
G2
4D2 5
D2 6
D1 7
D1 8
C813
560pF
PT801
24:24: 2400
7
1
3
85
6
2
4
C842
0.001uF
1 2
R839
6.2M 1/2W
12
D883
IN 4148
R888
1K 1/10W
12
OP2
OP4
OP2
Isen
BL_CTL
PANEL_ID
VDD
Q881
2N7002 1
32
C831
0.33uF
12
R806
100K/NC
1 2
VDD
+12VCC
C847
0.022uF /25V
OP1
R823
10R
12
VDD
VDD
R855
10K_1%
D885
IN 4148
+12VCC
PANEL_ID
R842
10R
12
+12VCC
Isen
C820
470uF/25V
Q883
2N7002 1
32
VDD
R804
10K 1/10W
12
C807
3PF 3KV
12
R831
1K
R871
10K 1/2W
12
C843
0.001uF
1 2
C881
0.01uF
R861
100K_1%
12
R825
7.5K _1%
1 2
D887
IN 4148
R811
3M3
12
Philips HPL1940T/L1740
PCB : 715G1821-1/715G1995-1
IC901

17" LCD Color Monitor HP L1740
19
ZD949
RLZ 12B_NC
1 2
C914
1uF
12
+12VC C
+3. 3V
R926
0R
C915
0.012uF /25V
R943
5.1K 1/10W
1 2
S901
spot gap_NC
C935
3.3nF /500V_NC
12
R910
1.5M/R 1206
R907
10K/R 1206
Q901
STP7NK80ZFP
1
23
+
C932
1000uF/ 25V
S902
spot gap_NC
IC901
TEA1532
CTRL
VCC
GND
DRA
DEM
PRO SEN
DRV
FB901
BEAD
D901
BYT42J
R901
680K
1 2
R902
680K
1 2
R900
680K
1 2
PCB : 715G1821-1/715G1995-1
Philips HPL1940/L1740
D931
MBRF10H 100CT-45
R945
9.1K_1%
1 2
5VA
O
T90 1
POWER X'FMR
4
6
2
1
5
9
7
8
11
12
10
+12V
R944
9.1K/ 0805_1%
1 2
D935
STPS10L45CFP
+
C936
1000uF/ 16V
R920
0.22R /1W
R919
1R/1/2W_NC
R904
1.5M/R 1206
CN 901
AC SOCKET
1 2
3
D926
RGP10D
R937
1.8K_1/8W
1 2
N
R955
NC
R923 12K_1%
12
R914
1K24_1%
+
C927
68u/25V
R949
100 _NC
1 2
F901
FUSE 3.15A 250V
1 21 2
L
C920
0.001uF /1KV
12
R921
750R
12
L901
7mH
14 23
+3.3V
R931
100 OHM 1/4W
1 2
R905
100K/1W
+
C933
1000uF/ 25V
R942
27K _NC
12
R927 4.7K_1206
12
L903
C8B- R6H_NC
1 2
D906
NC
C917 0.33uF/ 25V
D905
P4KE_NC
C941 0. 0056uF
BL_CTL
BRIGHTNESS
PANEL_I D
+
C956
1000UF 10V
5VA
+12V
CN 951
HAR NESS 14P-14P 65mm
11
22
33
44
55
66
77
88
99
10 10
11 11
12 12
13 13
14 14
+
C952
470UF 25V
VAR901
varistor_NC
ZD 951
P6KE8.2A
+12VC C
+5V
C951
0.1uF /25V
C955
0.1uF /25V
R952
10
1 2
L951
0.8uH
1 2
R953
1K 1/4W_NC
1 2
L955
0.8uH
1 2
R951
3.3K _NC
1 2
F902
JUMP
L904
NC
1 2
C900
0.001uF /250V
12
C901
0.001uF /250V
12
ZD975
RLZ5.1B
1 2
IC941
KIA431A
R915 10
L5972D
IC 903
NC
COMP
4
OUT 1
GND
2
VCC
8
FB 5
GND
3
GND
6
GND
7
R941
1K
R932
100OHM 1/4W
1 2
C942
4.7nF /25V_NC
+
C958
470UF 25V
C959
NC
12
D918 1N 4148
R954
100 OHM 1/10W
R958
NC
R916
750R
12
C953
NC
C912
0.0022uF /400V
12
R956
NC
R935
2R2_NC
1 2
R917
33K
+
C907
100uF/ 450V
R959
22K _NC
C913
0.1uF
12
R946
100K_1%
1 2
NR901
SCK 084
+
C962
NC
R936
2R2_NC
1 2
IC902
TCET1103
12 43
R957
NC
C908
0.47uF /275V
12
R912
1M
1 2
C931
270PF 500V
12
FB902
BEAD
-+
BD901
U4KB80R
2
1
3
4
R918 150
12
L902
C8B-R6H_NC
1 2
C960
NC
C961
NC

17" LCD Color Monitor HPL1740
20
8. PCB Layout
8.1 Main Board