LENOVO D170 service manual
17” LCD Color Monitor Lenovo D170 Wide
Service
Service
Service
Horizontal Frequency
30-80 kHz
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents.......……..............................…........1
Revision List.…........................................……......2
Important Safety Notice.…….........................……......3
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............……………............9
4.1.Input Signal Connector............………….................9
4.2.Factory Preset Display Modes.........................10
N
4.3.Panel Specification.....……...……………..................11
5.Block Diagram………...................…………................14
5.1.Software Flow Chart…………………………...........14
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5.2. Electrical Block Diagram………………………......16
6.Schematic…………………...................................…18
6.1.Main Board.................................................18
6.2.Power Board....……….…....................................23
7.PCB Layout..……………….......................................25
7.1.Main Board……………........................................25
7.2.Power Board….......................................28
7.3.Key Board…………...…….....................................29
8.Maintainability…………….........................................30
8.1.Equipments and Tools Requirement...............30
8.2.Trouble Shooting…………..............................31
9.White-Balance Luminance adjustment………….....37
10.Monitor Exploded View……………………….........39
11.BOM List….....................................................40
12. Different Parts List….............................................50
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 Lenovo D170 Wide
Revision List
Revision Date Revision History TPV Model
A00 May-21-07 First Version Release T77HRDNDRWH6NN
A01 Aug 18, 2008 Add new BOM
T78GRDNCRWG2NC
T78GRDNCRWG1NC
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17” LCD Color Monitor Lenovo D170 Wide
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing service
operations. Some of these service operations require the use of tools specially designed for the purpose. The
special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,
fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit.
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
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damage the panel.)
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17” LCD Color Monitor Lenovo D170 Wide
1. Monitor Specifications
Items Descriptions
Driving system TFT Color LCD
Type HSD170MGW1-A01
Size 17"
LCD Panel
Pixel pitch 0.255mm(H) x 0.255mm (V)
Viewable angle 160˚ (H) 160˚ (V) (CR>5)
Response time (type) 8 ms for HSD panel
Sync. Type H/V TTL
Input
Power Consumption
Contrast Ratio 500:1
Dot Clock 137MHz
White Luminance 250cd/m
Max. Resolution 1440 x900
Display Color 262,144
Plug & Play VESA DDC2BTM
Power Source 90~264VAC,47~63Hz
Environmental
Considerations
H-Frequency 30kHz – 80kHz
V-Frequency 50-75Hz
ON Mode < 30W
OFF Mode <2W
2
Operating Temp: 0°C to 45°C
Storage Temp: -20°C to 60°C
Operating Humidity: 10% to 80%
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17” LCD Color Monitor Lenovo D170 Wide
(
)
2. LCD Monitor Description
The LCD monitor will contain a main board, a power board and 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.
Monitor Block Diagram
Power Board
Include: adapter, inverter
AC-IN
100V-240V
CCFL Drive.
Key Board
Flat Panel and
CCFL backlight
Main Board
HOST Computer
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
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17” LCD Color Monitor Lenovo D170 Wide
3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The control buttons are located on the right side of the
monitor.
By changing these settings, the picture can be adjusted to your personal preferences.
The power cord should be connected.
-
Connect the video cable from the monitor to the video card.
-
Press the power button to turn on the monitor, the power indicator will light up.
-
3.2 Control Buttons
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17” LCD Color Monitor Lenovo D170 Wide
3.3 Adjusting the Picture
OSD functions
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17” LCD Color Monitor Lenovo D170 Wide
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17” LCD Color Monitor Lenovo D170 Wide
4. Input/Output Specification
4.1 Input Signal Connector
Pin No. Description Pin No. Description
1. Red Input 9. +5VDC
2. Green Input 10. Connection detect
3. Blue Input 11. GND
4. GND 12. SDA
5. GND 13. H Sync
6. Red GND 14. V Sync
7. Green GND 15. SCL
8. Blue GND
VGA connector layout
15
6
11 15
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17” LCD Color Monitor Lenovo D170 Wide
4.2. Factory Preset Display Modes
TIMING
NTSC
VGA@ 60Hz
PAL
VGA@50Hz
640x480
@60Hz
640x480
@66Hz
640x480
@72Hz
640x480
@75Hz
800x600
@56Hz
800x600
@60Hz
800x600
@72Hz
800x600
@75Hz
832x624
@75Hz
1024x768
@60Hz
1024x768
@70Hz
1024x768
@75Hz
1152x864
@75Hz
1280x1024
@60Hz
1280x1024
@70Hz
1280x1024
@75Hz
1440x900
@60Hz
1440x900
@60Hz
1440x900
@75Hz
FH(KHZ)
FV(HZ)
31.469 800 640 96 16 48 25.175
59.940 525 480 2 10 33
31.25 884 700 72 5 107 27.625
50Hz 625 570 2 12 41
31.469 800 640 96 16 48 25.175
59.94 525 480 2 10 33
35.00 864 640 64 64 96 30.24
66.67 525 480 3 3 39
37.861 832 640 40 24 128 31.5
72.809 520 480 3 9 28
37.5 840 640 64 16 120 31.5
75 500 480 3 1 16
35.156 1024 800 72 24 128 36
56.25 625 600 2 1 22
37.879 1056 800 128 40 88 40
60.317 628 600 4 1 23
48.077 1040 800 120 56 64 50
72.188 666 600 6 37 23
46.875 1056 800 80 16 160 49.5
75 625 600 3 1 21
48.943 1088 832 80 48 128 53.25
75 654 624 4 3 23
48.363 1344 1024 136 24 160 65
60.004 806 768 6 3 29
56.476 1328 1024 136 24 144 75
70.069 806 768 6 3 29
60.023 1312 1024 96 16 176 78.75
75.029 800 768 3 1 28
67.708 1536 1152 120 72 192 104
75 905 864 4 3 34
63.981 1688 1280 112 48 248 108
60.020 1066 1024 3 1 38
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74.882 1696 1280 160 32 224 127
69.853 1072 1024 4 2 42
79.976 1688 1280 144 16 248 135
75.025 1066 1024 3 1 38
55.935 1904 1440 152 80 232 106.5
59.887 934 900 6 3 25
55.469 1600 1440 32 48 80
59.901 926 900 6 3 17 88.75
70.635 1936 1440 152 96 248 136.75
74.984 942 900 6 3 33
TOTAL
(DOT/LINE)
ACTIVE
(DOT/LINE)
SYNC
WIDTH
(DOT/LINE)
FRONT
PORCH
(DOT/LINE)
BACK
PORCH
(DOT/LINE)
PIXEL
FOREQ
(MHZ)
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17” LCD Color Monitor Lenovo D170 Wide
4.3 Panel Specification
4.3.1 General Characteristics
HannStar Display model HSD170MGW1-A is a color active matrix thin film transistor (TFT) liquid crystal
display (LCD) that uses amorphous silicon TFT as a switching device. This model is composed of a TFT LCD
panel, a driving circuit and a back light system. This TFT LCD has a 17.0 inch diagonally measured active
display area with XGA resolution (900 vertical by 1440 horizontal pixel array) and can display up to
262,144 colors.
4.3.2 Features
_ 17.0 WXGA+ for Monitor application
_ High Resolution: 1440*900
_ 2-ch LVDS interface system
_ Input timing: DE mode
_ Wide Viewing Angle
_ RoHS compliance
4.3.3 Display Characteristics
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17” LCD Color Monitor Lenovo D170 Wide
4.3.4 Optical Characteristics
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17” LCD Color Monitor Lenovo D170 Wide
4.3.5 Parameter guide line for CCFL Inverter
TFT LCD Module:
Back Light Unit:
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17” LCD Color Monitor Lenovo D170 Wide
5. Block Diagram
5.1 Software Flow Chat
1
2
4
5
6
7
Y
3
N
N
Y
N
8
Y
9
10
Y
N
12
Y
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18
N
19
N
11
13
15
17
N
Y
N
16
Y
Y
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17” LCD Color Monitor Lenovo D170 Wide
1) MCU initialize.
2) Is the EPROM blank?
3) Program the EPROM by default values.
4) Get the PWM value of brightness from EPROM.
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 EPROM.
Turn on the LED and set it to green color.
Scalar initializes.
10) In standby mode?
11) Update the lifetime of back light.
12) Check the analog port, are there 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 Lenovo D170 Wide
5.2 Electrical Block Diagram
5.2.1 Main Board
Crystal
24MHz
(X401)
LCD Interface
(CN601)
MCU
RTD2120L
(U401)
CLKOUT
Scalar IC RTD2025L
(Include ADC, OSD)
(U501)
EPR_SDA
EPR_SCL
DDC1_SCL
DDC1_SDA
H sync
V sync
RGB
EEPROM
M24C16
(U403)
Key Board
Control
(CN202)
D-Sub
Connector
(CN301)
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