AOC HP-L1706 Schematic
17" LCD Color Monitor HP L1706
Service
Service
Service
Horizontal Frequency
30- 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............……………............7
4.1. Input Signal Connector............………….................7
4.2. Factory Preset Display Modes......…..................8
4.3. Power Supply Requirements...............................9
5. Panel Specification.....………………..................10
5.1. General Feature…….....………………..................10
5.2. Optical Characteristics………………………………11
5.3 Parameter guide line for CCFL Inverter……………..13
6. Block Diagram……...................…………................15
6.1. Monitor Exploded View…………………....….......15
6.2 Software Flow Chart……………………….……….16
6.3. Electrical Block Diagram……………..….......18
7. Schematic……………......................................20
7.1 Main Board....……….......................................20
7.2 Power Board.….……....................................24
8.PCB Layout..………….......................................26
8.1. Main Board………........................................26
8.2. Power Board….......................................28
8.3. Key Board………............….......................31
9. Maintainability……….......................................32
9.1. Equipments and Tools Requirement..............32
9.2. Trouble Shooting………..............................33
10. White-Balance, Luminance adjustment...39
11. BOM List….....................................................40
12. Different Parts List.........…….……........................52
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
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17" LCD Color Monitor HP L1706
Revision List
Version Date Revision History TPV Model Name
A00 Apr.-04-2007 first release T76CM9DKAKHPNE
A01 May.-08-2007 Add TPVDW Model in Item 12
A02 Jun.-07-2007 Add TPVDW Model in Item 12 T76SM9DKAKHPNE
A03 Jun.-19-2007 Add TPVDW Model in Item 12 T76CM9DPAKHPNE
A04 Sep.-26-2007 Add TPVDW Model in Item 12 T76GM9DBAKHFNNE
A05 Oct.-10-2007 Add TPVDW Model in Item 12 T76SM9DBAKHFNNE
A06 Oct.-16-2007 Add TPVDW Model in Item 12 T76SM9DAAKHANNE
A07 Oct.-18-2007 Add TPVDW Model in Item 12 T76CM9DBAKHFNNE
A08 Nov.-01-2007 Add TPVDW Model in Item 12 T76GM9DNAKHANNE
A09 Nov.-09-2007 Add TPVDW Model in Item 12
A10 Dec.-09-2007 Add Second Panel in Item 5 LTM170EUL31-8TM
T76GM9DKAKHPNE
T76GM9DPAKHPNE
T76SM9DKAKHPN1E
T76SM9DPAKHPNE
2
17" LCD Color Monitor HP L1706
1. Monitor Specification
3
17" LCD Color Monitor HP L1706
(
2. LCD Monitor Description
The LCD Monitor will contain main board, power board, key board and an audio 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 and inverter)
AC-IN
110V-240
Monitor Block Diagram
CCFT Drive.
Main Board
Audio board
Key board
Flat Panel and
CCFL backlight
RS232 Connector
For white balance
adjustment in
factory mode
Video signal, DDC
HOST Computer
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17" LCD Color Monitor HP L1706
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 Buttons
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17" LCD Color Monitor HP L1706
3.3 Adjust the Picture
Use the On-Screen Display (OSD) to adjust the screen image based on your viewing preferences. To access the OSD,
do the following:
1. If the monitor is not already on, press the Power switch to turn on the monitor.
2. To access the OSD Menu, press the Menu button on the monitor’s front panel.
3. To navigate through the OSD Menu, press the + (Plus) button on 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.
If the buttons remain untouched for 10 seconds while displaying a menu, new adjustments will be discarded and the
settings will revert to previous settings and exit the menu.
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17" LCD Color Monitor HP L1706
4. Input/Output Specification
4.1 Input Signal Connector
Pin Signal Pin Signal
1 Red Video 9 +5 V (from PC)
2 Green Video 10 Ground
3 Blue Video 11 Ground
4 Ground 12 DDC-serial Data
5 Detect Cable 13 Horizontal Sync
6 Red GND 14 Vertical Sync
7 Green GND 15 DDC-serial Clock
8 Blue GND
VGA connector layout
PIN 1
PIN 11
PIN 5
7
17" LCD Color Monitor HP L1706
4.2 Factory Preset Display Modes
8
17" LCD Color Monitor HP L1706
4.3 Power Supply Requirements
Parameter Range
AC Line Voltage range 100 to 240V
AC Line Frequency range 47 to 63 Hz
Peak surge Current < 55 A MAX AT 220VAC and cold starting
Leakage Current < 3.5 mA
Power Consumption
≤37W
9
17" LCD Color Monitor HP L1706
5. Panel Specification
5.1 General Feature
CLAA170EA07P
LTM170EUL31-8TM
10
17" LCD Color Monitor HP L1706
5.2 Optical Characteristics
CLAA170EA07P
11
17" LCD Color Monitor HP L1706
LTM170EUL31-8TM
12
17" LCD Color Monitor HP L1706
5.3 Parameter guide line for CCFL Inverter
TFT LCD Module:
CLAA170EA07P
LTM170EUL31-8TM
13
17" LCD Color Monitor HP L1706
Back Light Unit:
CLAA170EA07P
LTM170EUL31-8TM
14
17" LCD Color Monitor HP L1706
6.2 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
16
17" LCD Color Monitor HP L1706
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?
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17" LCD Color Monitor HP L1706
Vsy
6.3 Electrical Block Diagram
6.3.1 Scalar Board
EEPROM
(U402)
EPR_SDA
EPR SCL
Panel Interface
(CN101)
Scalar TSUM16AL
(Include ADC、OSD、MCU)
(U401)
RXD
TXD
R
G
B
Hsync,
nc
DDC_SDA
DDC SCL
D-Sub Connector
(CN405)
EEPROM
(U404)
DB15_SDA
DB15 SCL
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17" LCD Color Monitor HP L1706
6.3.2 Inverter / Power Board
AC inlet filter
Start circuit R905; R909, R910
On/off control
Rectifier and
filter
Switching circuit
PWM control
IC&MOSFET
Start circuit
Transform
OVP circuit
Rectifier and
filter D20;
D921
Feedback
IC902;IC921
circuit
12V/5V
To main board
12V
PWM control IC
Push-pull
circuit
Dimming control
Feedback circuit
LC resonant
Lamp
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17" LCD Color Monitor HP L1706
7. Schematic
7.1 Main Board
11/21 CN405 #11 change to NC
CN405
1716
11
12
13
14
15
HSI
VSI
D408
MLL5232B 5.6V
D411
MLL5232B 5.6V
DB15
1
6
2
7
3
8
4
9
5
10
RED+
REDGREEN+
GREENBLUE+
BLUE-
PC5V
D406
MLL5232B 5.6V
D409
MLL5232B 5.6V
D412
MLL5232B 5.6V
RED+
GREEN+
BLUE+
PC5V
RED-
GREEN-
BLUE-
3
D403
BAV99
C439 0. 1uF
2
VGA_CON
FB409 150 OHM
1
3
C440 0. 1uF
2
D404
BAV99
FB410 150 OHM
FB411 150 OHM
FB412 150 OHM
3
D405
BAV99
C441 0. 1uF
2
1
R448
2.2K 1/ 10W
C432 0. 047uF
C433 0. 047uF
C434 0. 047uF
C435 0. 001uF
C436 0. 047uF
C437 0. 047uF
C438 0. 047uF
SCL_VGA
SDA_VGA
RIN 2
GIN 2
BIN 2
SOG 2
GNDR 2
GNDG 2
GNDB 2
DET_VGA 2
HSYNC 2
VSYN C 2
R453 47 1/10W
R454 47 1/10W
DDCA_SDA2
DDCA_SCL2
+5V
R470
1K 1/10W
ESD_5V
D425
MLL5232B 5.6V
11/27 D407 change to BAV70(93G-64-42-P)
PC5V
+5VA
1
2
D407
BAV70
3
R451
R450
10K 1/10W
10K 1/10W
R452
10K 1/10W
U404
8
VCC
7
WP
6
SCL
5
SDA
24LC02B/SN G
VSS
A0
A1
A2
C444
0.1uF
1
2
3
4
DDC_WP 2
R434 56 1/10W
R435 56 1/10W
R436 56 1/10W
R437 470 1/10W
R439
R447 1K 1/10W
C443
220pF
75 1/10W
R438
75 1/10W
ESD_5V
1
R446 1K 1/10W
R449
C442
2.2K 1/ 10W
33pF
R440
75 1/10W
R441 100 1/10W
R442 100 1/10W
R443 100 1/10W
+5V
+5V 2, 3
R444
10K 1/10W
R445 100 1/10W
D410
MLL5232B 5.6V
20
Tit le
Size Document N umber Rev
B
Date: Sheet
715G2433-A(L1706 down size)
INPUT
14Thursday , D ecember 07, 2006
of
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