AOC HP L1750 User manual

17" LCD Color Monitor HPL1750
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..............................………........4
2. LCD Monitor Description…………………………….......5
3. Operation Instruction…………...............……...........6
3.1. General Instructions...........................…...........6
3.2. Control Button…………….…..............……...............6
3.3 Adjusting the Picture...........................…............7
4. Input/Output Specification............……………............11
4.1. Input Signal Connector............………….................11
4.2. Factory Preset Display Modes......…..................12
5. Panel Specification.....………………..................13
5.1. General Feature…….....………………..................13
5.2. Optical Characteristics………………………………15
6. Block Diagram……...................…………................18
6.1 Software Flow Chart………………………………...18
6.2.Electrical Block Diagram……………..….......20
7. Schematic……………......................................22
7.1 Main Board....……….......................................22
7.2 Power Board.….……....................................26
7.3 Key Board…………………………………………..30
7.4 USB Board…………………………………………31
8.PCB Layout..…….......................................32
8.1. Main Board………........................................33
8.2. Power Board….......................................34
8.3. Key Board………............….......................36
8.4 USB Board…………………………………………37
9. Maintainability……….......................................39
9.1. Equipments and Tools Requirement..............39
9.2. Trouble Shooting……….............................40
9.2.1 Main Board…………..............................40
9.2.2 Power Board………..............................42
9.2.3 Key Board…………..............................44
10 White-Balance, Luminance adjustment...45
11.Mechanical Instructions……………..…...….......47
12. Monitor Exploded View………………..…....….......53
13. BOM List………………………………..……………54
14. Different Parts List.........…………..........................68

17" LCD Color Monitor HPL1750
2
Revision List
Version Date Revision History TPV Model Name
A00 Aug.-06-2007 Initial release T77AMMDKHNHPQNE
A01 Aug.-10-2007 Add TPVDW Model in Item 14 T77GMMDKHNHPQNE
T77GMMDTHNHPQNE
A02 Sep.-14-2007 Add TPVDW Model in Item 14
T77CMMDKHNHPQNE
T77CMMDLHNHPQNE
A03 Sep.-21-2007 Add TPVDW Model in Item 14
T77GMMDLHNHPQNE
A04 Oct.-10-2007 Add TPVDW Model in Item 14 T77AMMDTHNHPQNE
T77CMMDTHNHPQNE
T77AMMDBHNHPQNE
A05 Oct.-16-2007 Add TPVDW Model in Item 14
T77CMMDBHNHPQNE
A06 Oct.-22-2007 Add TPVDW Model in Item 14 T77GMMDDHNHPQNE
T77CMMDQHNHPQNE
A07 Nov.-01-2007 Add TPVDW Model in Item 14
T77GMMDBHNHPQNE
A08 Nov.-06-2007 Add TPVDW Model in Item 14 T77GMMDQHNHPQNE
T77SMMDKHNHPQNE
T77SMMDQHNHPQNE
A09 Nov.-16-2007 Add TPVDW Model in Item 14
T77SMMDTHNHPQNE
A10 Vec.-03-2007 Add TPVDW Model in Item 14 T77AMMDLHNHPQNE
LM170E03-TLL2 LPL
LM170E03-TLG2/TLG4
CLAA170EA07P 040
M170EG01 VD00 AUO
LTM170EU-L31 QBC(
LTM170EU-L31 8TM
Add Second Panel list in Item 5
M170EG01 VD0B SZ
T77SMMDKHNHPQ1E
A11 Dec.-12-2007
Add TPVDW Model in Item 14
T77CMMDDHNHPQNE
A12 Jan.-22-2008 Update Power Board in Item 7 715G2655 2 2
A13 Jul.-01-2008 Add Second Panel list in Item 5 CPT EA07P 8H4U/8H4V 8J4U/8J4V+MST
T77SMMDLHNHPQNE
T78CMMDKHNHP2NE
T77SMMDBHNHPQ1E
T77GMMDBHNHPQ1E
T77GMMDKHNHPQ1E
T77SMMDDHNHPQNE
T77CMMDBHNHPQ6E
T77CMMDKHNHPQ6E
A14 Nov.-05-2008 Add TPVDW Model in Item 14
T77CMMDBHNHPQ1E

17" LCD Color Monitor HPL1750
3
T77CMMDKHNHPQ1E
T77GMMDDHNHPQ1E
T77GMMDTHNHPQ1E
T77GMMDLHNHPQ1E
T77CMMDDHNHPQ1E
T77AMMDBHNHPQCE
T77GMMDBHNHPQ6E
T77CMMDTHNHPQ6E
T77GMMDKHNHPQCE
T77GMMDKHNHPQ6E
T77SMMDDHNHPQCE
T77SMMDBHNHPQCE
T77SMMDKHNHPQCE
T78CMMDKHNHP21E

17" LCD Color Monitor HPL1750
4
1. Monitor Specification

17" LCD Color Monitor HPL1750
5
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 HPL1750
6
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 HPL1750
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3.3 Adjust the Picture

17" LCD Color Monitor HPL1750
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17" LCD Color Monitor HPL1750
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17" LCD Color Monitor HPL1750
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17" LCD Color Monitor HPL1750
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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

17" LCD Color Monitor HPL1750
12
4.2 Factory Preset Display Modes

17" LCD Color Monitor HPL1750
13
5. Panel Specification
5.1 General Feature
M170EG01 VD00 AUO / M170EG01 VD0B SZ
LM170E03-TLL2 LPL/LM170E03-TLG2/TLG4
CLAA170EA07P 040

17" LCD Color Monitor HPL1750
14
LTM170EU-L31 QBC / LTM170EU-L31 8TM
CPT EA07P 8H4U/8H4V 8J4U/8J4V+MST

17" LCD Color Monitor HPL1750
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5.2 Optical Characteristics
M170EG01 VD00 AUO / M170EG01 VD0B SZ
LM170E03-TLL2 LPL/LM170E03-TLG2/TLG4

17" LCD Color Monitor HPL1750
16
CLAA170EA07P 040
CPT EA07P 8H4U/8H4V 8J4U/8J4V+MST

17" LCD Color Monitor HPL1750
17
LTM170EU-L31 QBC / LTM170EU-L31 8TM

17" LCD Color Monitor HPL1750
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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 HPL1750
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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 HPL1750
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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