AOC 177PK Diagram
17” LCD Color Monitor AOC 177Pk
g
Service
Service
Service
Horizontal Frequency
30-83 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 Power Supply Requirement…………………………10
N
4.3.Factory Preset Display Modes.........................10
4.4.Panel Specification.....……...……………..................11
5.Block Diagram………...................…………................13
5.1.Software Flow Chart………………………...........13
6.Schematic…………………...................................…17
6.1.Main Board.................................................17
6.2. Audio Board.....………..…....................................22
6.3. Power Board....…..….….......................................23
7.PCB Layout..……………….......................................25
7.1.Main Board……………........................................25
7.2.Power Board…............................................27
7.3.Audio Board…............................................29
7.4.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….....................................................42
12.Different Parts List……………………………………54
5.2.Electrical Block Dia
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
ram…………………..…...........15
SAFETY NOTICE
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17” LCD Color Monitor AOC 177Pk
Revision List
Revision Date Revision History TPV Model
A00 Jun.-18-07 First Version Release T76CRTDBF1ACA
A01 Dec.-10-07 Second Release T76CRTDBF1A2E
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17” LCD Color Monitor AOC 177Pk
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
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
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
damage the panel.)
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17” LCD Color Monitor AOC 177Pk
1. Monitor Specifications
Items Descriptions
Driving system TFT Color LCD
LCD Panel
Input
Type
Size 43.2cm 17"
Pixel pitch 0.264mm( H )x 0.264mm( V )
Viewable angle 160˚ (H) 160˚ (V) (CR≥10)
Response time (type) 5 ms for CPT
Video
Connector
Video Signal
Sync. Type H/V TTL
75 OHM, Positive and TMDS
CLAA170EA07
R,G,B Analog Interface
Digital Interface
15-pin D-Sub
DVI 24pin
Analog:0.7Vp-p(standard),
Digital signal
H-Frequency 30kHz – 83kHz
V-Frequency 55-75Hz
Power
Consumption
Contrast Ratio 700:1
Dot Clock 135 MHz
White Luminance 300cd/m2
Max. Resolution 1280 x1024
Display Color 16.7M colors
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Maximum Screen
Size
Environmental
Considerations
Horizontal : 337.96 mm
Vertical: 270.34 mm
Operating Temp: 5°C to 35°C
Storage Temp: -20°C to 60°C
Operating Humidity: 10% to 85%
ON Mode ≤37W
OFF Mode ≤1W
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17” LCD Color Monitor AOC 177Pk
(
)
2. LCD Monitor Description
The LCD MONITOR will contain a main board, an audio 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
Audio Board
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
HOST Computer
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17” LCD Color Monitor AOC 177Pk
3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The control buttons are located at front panel 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
Item
1 > / Audio
2 < / audio
3 Power Power On / Off
4 Menu/Enter Select Function or select Sub menu Activate OSD main menu
5 Auto/Exit Exit OSD or back to previous menu Auto configuration
Name
1.Move the cursor up
2.Increase the value of the selected item
1.Move the cursor down
2.Decrease the value of the selected item
Within OSD
Activate the audio menu
Activate the audio menu
Power On / Off
Without OSD
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17” LCD Color Monitor AOC 177Pk
3.3 Adjusting the Picture
OSD functions
Main Menu Item
Luminance
Image Setup
Image Position
Main
Menu
Icon
Sub Menu
Brightness
H. Position
V. Position
Item
Contrast
Focus
Clock
Sub
Menu
Icon
Description
Contrast from Digital-register.
Backlight Adjustment
Adjust Picture Phase to reduce Horizontal-Line noise
Adjust picture Clock to reduce Vertical-Line noise.
Adjust the horizontal position of the picture.
Adjust the vertical position of the picture.
Color Temp.
Warm N/A Recall warm Color Temperature from EEPROM.
Cool N/A Recall cool Color Temperature from EEPROM.
sRGB N/A Recall sRGB Color Temperature from EEPROM.
User / Red
User / Green
User / Blue
7
Red Gain from Digital-register.
Green Gain Digital-register.
Blue Gain from Digital-register.
17” LCD Color Monitor AOC 177Pk
Analog N/A Select input signal from analog source (D-Sub)
Input Select
OSD Setup
Language
Information
Reset
Digital N/A Select input signal from digital source (DVI)
H. Position
V. Position
OSD Timeout
Language N/A Select the language you like.
Information N/A
Yes N /A
No N/A Do not execute reset, return to main menu.
Adjust the horizontal position of the OSD.
Adjust the vertical position of the OSD.
Adjust the OSD timeout.
Show the resolution, H/V frequency and input port of
current input timing.
Clear each old status of Auto-configuration and set
the color temperature to Cool.
Exit
N/A N/A Exit OSD
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17” LCD Color Monitor AOC 177Pk
4. Input/Output Specification
4.1 Input Signal Connector
1. D-SUB connector
Pin No. Description Pin No. Description
1.
2.
3.
4.
5.
6.
7.
8.
2. DVI-D connector
Red
Green
Blue
Ground
DDC-Return
R-Ground
G-Ground
B-Ground
VGA connector layout
9.
10.
11.
12.
13.
14.
15.
+ 5V
Detect Cable
Ground
DDC-Serial Data
H-Sync
V-Sync
DDC-Serial Clock
Pin No. Description Pin No. Description
1.
2.
3. TMDS data 2/4 Shield 15. GND (for +5V)
4.
5.
6. DDC Clock 18.
7. DDC Data 19. TMDS data 0/5 Shield
8. NC 20.
9.
10.
11. TMDS data 1/3 Shield 23. TMDS Clock +
12.
TMDS data 2－
TMDS data 2＋
TMDS data 4－
TMDS data 4＋
TMDS data 1－
TMDS data 1＋
TMDS data 3－
24 - Pin Color Display Signal Cable
13.
14.
16. Hot Plug Detect
17.
21. TMDS data 5+
22. TMDS Clock Shield
24.
TMDS data 3＋
＋5V Power
TMDS data 0－
TMDS data 0＋
TMDS data 5－
TMDS Clock －
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17” LCD Color Monitor AOC 177Pk
4.2 Power Supply Requirement
A/C Line voltage range : 100 V ~ 240 V
A/C Line frequency range
Current : TBD
Peak surge current : < 55A peak at 240 VAC and cold starting
Leakage current : < 3.5mA
Power line surge
DC output Voltage
Current (max) : 3.5 Amp (12V)
4.3. Factory Preset Display Modes
Standard
Dos-mode 720 × 400 31.47kHz 70.0Hz
VGA
Resolution
640 × 480 31.47kHz 60.0Hz
640 × 480 37.50kHz 75.0Hz
: 50 ± 3Hz, 60 ± 3Hz
: No advance effects (no loss of information or defect) with a
maximum of 1 half-wave missing per second
: 12VDC ± 5％
Horizontal
Frequency
Vertical
Frequency
SVGA
XGA
SXGA
800 × 600 37.879kHz 60.0Hz
800 × 600 46.875kHz 75.0Hz
1024 × 768 48.363kHz 60.0Hz
1024 × 768 56.476kHz 70.0Hz
1024 × 768 60.02kHz 75.0Hz
1024 × 768 48.780 kHz 60.0Hz
1024 × 768 60.241 kHz 75.0Hz
1280 × 1024 64.00 kHz 60.0Hz
1280 × 1024 80.00 kHz 75.0Hz
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17” LCD Color Monitor AOC 177Pk
4.4 Panel Specification
CLAA170EA07P2 is 17.0” color TFT-LCD (Thin Film Transistor Liquid Crystal Display) module composed of LCD
panel, driver ICs, control circuit and backlight. By applying 8 bit digital data, 1280×1024, 16.7M-color images are
displayed on the 17.0” diagonal screen. Input power voltage is 5.0V for LCD driving. Inverter for backlight is not
included in this module. General specification are summarized in the following table:
4.4.1 Display Characteristics
4.4.2 Optical Characteristics
Ta= 25 ℃，VCC=5.0V
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17” LCD Color Monitor AOC 177Pk
4.4.3 Electrical Characteristics
1. TFT LCD Module
2. Backlight Unit
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17” LCD Color Monitor AOC 177Pk
5. Block Diagram
5.1 Software Flow Chat
1
2
N
4
5
Y
6
7
Y
Y
3
N
N
8
18
9
1
Y
N
N
12
Y
14
19
N
11
N
13
Y
N
15
Y
17
16
Y
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17” LCD Color Monitor AOC 177Pk
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 AOC 177Pk
5.2 Electrical Block Diagram
5.2.1 Main Board
Flash Memory
AT24C16AN
(U302)
EPR_SDA
EPR_SCL
Crystal
24MHZ
(X301)
MCU
RTD2120L
(U402)
Key Board
Control
CLKOUT
(CN504)
Scalar IC RTD2525L
(Included ADC, OSD)
(U401)
H sync
V sync
RGB
D-Sub
Connector
(CN702)
DDC1_SDA,
DDC1_SCL
PANEL
D-DVI
Connector
(CN701)
DDC2_SDA,
DDC2_SCL
EEPROM
M24C02
(U702)
EEPROM
M24C02
(U701)
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17” LCD Color Monitor AOC 177Pk
t
5.2.2 Inverter/Power Board
AC input
EMI filter
Bridge
Rectifier
and Filter
Transformer
Rectifier
diodes
Start Circuit: R911
CN902
PWM
Control IC
Feedback
Circuit
12V
5V
Lamp
Output
Circuit
Feedback
Circui
Transformer
Over
Voltage
ON/OFF
MOSFET
PWM
Control IC
ON/OFF
Control
DIM
DIM
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17” LCD Color Monitor AOC 177Pk
6. Schematic
6.1 Main Board
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