AOC 171S+ User manual

AOC 171S/171S+
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17” LCD MONITOR
171S
171S+
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS
BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF
THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES,
ERRORS OR OMISSIONS.
SERVICE MANUAL

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Table of Content
Revision List…………………………………………………………………………………………………………. 3
1. Monitor Specifications………………………………………………………………………………………….. 4
2. LCD Monitor Description……………………………………………………………………………………….. 5
3. Operating Instructions………………………………………………………………………………………….. 6
3.1 General Instructions…………………………………………………………………………………………... 6
3.2 Front Panel Control…………………………………………………………………………………….……... 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
4.3 Power Supply Requirements………………………………………………………………………………… 11
4.4 Panel Specification………………………………………………………………………………………….… 11
4.4.1 Panel Feature……………………………………………………………………………….……………. 11
4.4.2 Display Characteristics……………………………………………………………….………………….. 11
4.4.3 Optical Characteristics…………………………………………………………………………………… 13
4.4.4 Electrical Characteristics………………………………………………………………………………… 14
5. Block Diagram………………………………………………………………………………………………….… 16
5.1 Monitor Explored View………………………………………………………………………………………... 16
5.2 Software Flow Chart…………………………………………………………………………………………... 17
5.3 Electrical Block Diagram……………………………………………………………………………………… 19
5.3.1 Main Board……………………………………………………………………………………………….. 19
5.3.2 Inverter/Power Board……………………………………………………………………………………. 20
6. Schematic……………………………………………………………………………………………………….… 21
6.1 Main Board…………………………………………………………………………………………………….. 21
6.2 Power Board……………………………………………………………………………………….………….. 27
7. PCB Layout……………………………………………………………………………………………………….. 29
7.1 Main Board…………………………………………………………………………………………………….. 29
7.2 Power Board………………………………………………………………………….……………………….. 30
7.3 Keypad Board…………………………………………………………………………………………………. 30
8. Maintainability……………………………………………………………………………………………………. 31
8.1 Equipments and Tools Requirement………………………………………………………………………… 31
8.2 Trouble Shooting…………………………………………………………………………………………….… 32
8.2.1 Main Board………………………………………………………………………………………………... 32
8.2.2 Power /Inverter/Board…………………………………………………………………………………… 35
8.2.3 Keypad Board…………………………………………………………………………………………….. 37
9. White-Balance, Luminance adjustment………………………………………………………………….….. 38
10. EDID Content……………………………………………………………………………………………………. 39
11. BOM List ………………………………………………………………………………………………………... 40

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Revision List
Version Date Revision History TPV Model Name
T780KC4MDAACM
A00 Mar-17-06 Initial Revision
T780KV4MDAACM

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1. Monitor Specifications
Items Description
Driving system TFT Color LCD
Type CLAA170EA07 (for 171S)
SVA170SX01TB (for 171S+)
Size 43.2cm (17.0")
Pixel pitch 0.264mm (H) x 0.264mm (V)
Viewable angle 170(H) 170(V) (CR 5≧) (for 171S)
130(H) 110(V) (for 171S+)
LCD Panel
Response time (type) 12 ms (for 171S)
8 ms (for 171S+)
Sync. Type H/V TTL
Input Signal 15 Pin Analog
H-Frequency 30kHz – 80kHz
Input
V-Frequency 55-75Hz
ON Mode ≤45W
Power Consumption
OFF Mode ≤2W
Display Color 16.2M(6 Bit+ FRC) (for 171S)
16.77M colors (6bit+FRC) (for 171S+)
Contrast Ratio 500:1 (for 171S)
600:1 (for 171S+)
Dot Clock 135MHz
White Luminance 300cd/m2 (for 171S)
270 cd/m2 (for 171S+)
Max. Resolution 1280 x 1024
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Maximum Screen Size Horizontal : 337.920mm
Vertical: 270.336mm
Environmental
Conditions
Operating Temp: 5°C to 35°C
Storage Temp: -20°C to 60°C
Operating Humidity: 10% to 85%

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2. LCD Monitor Description
The LCD monitor will contain a main board, a power board and a keypad 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.
HOST Computer
AC-IN
100V-240V
PWPC board
(
Include: ada
p
ter
,
inverter
)
Flat Panel and
CCFL backlight
Main Board
RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
Video signal,
Monitor Block Diagram
Keyboard

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3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located in 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 position. The power indicator will light up.
3.2 Front Panel Control
- Auto Adjust Key:
The Auto Adjust Key is used to automatically set the H Position, V Position, Clock and Phase.
-Power Indicator:
Green — Power On mode.
Orange — Power Saving mode.
NO. Name Within OSD Without OSD
1 Auto/Exit Exit OSD or back to previous menu Auto configuration
2 /
1.Move the cursor to left
2. Decrease the value of the selected item Activate the brightness menu
3 Power Power On / Off Power On / Off
4 /1.Move the cursor to right
2. Increase the value of the selected item Activate the contrast menu
5 MENU Select Function or select Sub menu Activate OSD main menu

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3.3 Adjusting The Picture
OSD TABLE:
Main Menu
Item
Main Menu
Icon
Sub Menu
Item
Sub Menu
lcon Description Adjust
Range Reset Value
Contrast
Contrast from Digital-register. 0-100 Recall Cool
Contrast Value
Luminance
Brightness
Backlight Adjustment 0-100
Recall Cool
Brightness
Value
Focus
Adjust Picture Phase to reduce
Horizontal-Line noise 0-100 Do Auto Config
Image Setup
Clock
Adjust picture Clock to reduce
Vertical-Line noise. 0-100 Do Auto Config
H. Position
Adjust the horizontal position of
the picture. 0-100 Do Auto Config
Image
Position V. Position
Adjust the vertical position of the
picture. 0-100 Do Auto Config
Warm N/A
Recall Warm Color Temperature
from EEPROM. N/A
Cool N/A
Recall Cool Color Temperature
from EEPROM. N/A
User / Red
Red Gain from Digital-register. 0-100
User / Green
Green Gain Digital-register. 0-100
Color Temp.
User / Blue
Blue Gain from Digital-register. 0-100
The Color
Temperature
will be set to
Cool.
The User
R/G/B value
(default is 100)
will not be
Modified by
Reset function.
Yes
N/A Auto Adjust the H/V Position, Focus and Clock of picture. N/A N/A
Auto Config
(Analog-Only
Model) No N/A
Do not execute Auto Config,
return to main menu. N/A N/A

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H. Position
Adjust the horizontal position of
the OSD. 0-100 50
V. Position
Adjust the vertical position of the
OSD. 0-100 50
OSD Setup
OSD Timeout
Adjust the OSD timeout. 10-120 10
English N/A
Set OSD display language to
English. N/A
Deutsch N/A
Set OSD display language to
German. N/A
Français N/A
Set OSD display language to
French. N/A
Español N/A
Set OSD display language to
Spain. N/A
Italiano N/A
Set OSD display language to
Italian. N/A
Language
简体中文 N/A Set OSD display language to
Simplified Chinese. N/A
The Language
will be set to
English.
Information
Information N/A
Show the resolution, H/V
frequency and input port of
current input timing.
N/A N/A
Yes N/A
Clear each old status of
Auto-configuration and set the
color temperature to Cool.
N/A N/A
Reset
No N/A
Do not execute reset, return to
main menu. N/A N/A
Exit
N/A N/A Exit OSD N/A N/A

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4. Input/Output Specification
4.1 Input Signal Connector
Pin No. Description Pin No. Description
1. Red 9. +5V
2. Green 10. Detect Table
3. Blue 11. Ground
4. Ground 12. DDC-Serial Data
5. Ground 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
VGA connector layout
15
610
11 15

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4.2 Factory Preset Display Modes
VESA MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequenc
y
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500
VGA
640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500
800x600@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000
800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000
800x600@72Hz 1040 x 666 48.077 P 72.188 P 50.000
SVGA
800x600@75Hz 1056x625 46.875 P 75.000 P 49.500
1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000
XGA
1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750
1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000
SXGA
1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.000
IBM MODES
Horizontal Vertical
2Mode Resolution Total
Nominal
Frequenc
y
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
DOS* 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322
DOS** 640x400@70Hz 800 x 449 31.469 N 70.087 P 25.175
DOS 640x350@70Hz 800 x 449 31.469 P 70.087 N 25.175
MAC MODES
VGA 640x480@67Hz 864x525 35.000 N 66.667 N 30.240
SVGA 832x624@75Hz 1152x667 49.725 N 74.551 N 57.2832

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4.3 Power Supply Requirement
A/C Line voltage range 100 V ~ 240 V
A/C Line frequency range 50 ±3Hz, 60 ±3Hz
Peak surge current < 55A peak at 240 VAC and cold starting
Leakage current < 3.5mA
Power line surge No advance effects (no loss of information or defect)
with a maximum of 1 half-wave missing per second
DC output Voltage 12VDC± 5％
4.4 Panel Specification
4.4.1 Panel Feature
for 171S+
• a-Si TFT active matrix
• LVDS interface
• R.G.B input 8bit, 16.77 millions colors (6bit+FRC)
• Resolution SXGA:(1280×1024 pixels)
• Module size: 358.5(H) ×296.5(V) ×17.5MAX(D)mm
• High response time (Ton+Toff=8 ms）
• High gamut: (against NTSC 72%typ.)
• Edge light type backlight (4 CCFL lamps)
• Inverter less
• Replaceable lamp for backlight
4.4.2 Display Characteristics
for 171S

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for 171S+

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4.4.3 Optical Characteristics
for 171S
ITEM SYMBO
L CONDITION MIN. TYP. MAX. UNIT
Contrast Ratio CR θ= ψ﹦0°450 500 -- --
Center L
θ= ψ﹦0°250 300 -- cd/m2
Luminance
Uniformity □L θ= ψ﹦0°75% -- --
Tr θ= ψ﹦0°-- 5 10 ms
Response Time
Tf θ= ψ﹦0°-- 7 14 ms
Horizontal ψ80/80 85/85 --
Vertical θ
CR≧5
80/80 85/85 --
Horizontal ψ60/60 70/70 --
Viewing
Angle
Vertical θ
CR≧10
60/55 67/63 --
White Wx Wy 0.283
0.299
0.313
0.329
0.343
0.359
Red Rx Ry 0.614
0.308
0.644
0.338
0.674
0.368
Green Gx Gy 0.237
0.592
0.267
0.622
0.297
0.652
Color
Coordinates
Blue Bx By
θ= ψ﹦0°
0.110
0.054
0.140
0.084
0.170
0.114
--
Image sticking Tis 2 hour 2 sec
Crosstalk CT 1%
Flicker f -- -- -20 db
Gamut CS 69% 72%
Gamma y GL(32-223) 2.0 2.3 2.6

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for 171S+
4.4.4 Electrical Characteristics
1. TFT LCD Module:
for 171S

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for 171S+
2. Back Light Unit:
for 171S
for 171S+

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5. Block Diagram
5.1 Monitor Exploded View

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5.2 Software Flowing 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

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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?

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5.3 Electrical Block Diagram
5.3.1 Main Board
MCU
W78E65
(U601)
Scalar IC TSU16AK
(Include ADC, OSD)
(U401)
EEPROM
24LC16B
(U602)
EEPROM
M24C02
(U301)
H sync
V sync
RGB
DB15_SDA,
DB15
_
SCL
EPR_SDA
EPR_SCL
LCD Interface
(CN503)
Key Board
Control
D-Sub
Connector
(CN301)
Crystal
14.318MHZ
(X401)
Crystal
20MHZ
(X601)

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5.3.2 Inverter/Power Board
CN102
DIM
DIM
EMI filter
Bridge
Rectifier
and Filter
Start Circuit: R906、R907
PWM
Control IC
Transformer
Rectifier
diodes
AC input
12V
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
OSC and
Output
Circuit
DC Convert
Circuit
MOSFET
Over
Voltage
Protect
Lamp
ON/OFF
Feedback
Circuit
Over
Voltage
Protect