Acer AL2017 User manual

Acer Service Manual
Service Manual
LCD Monitor Acer
AL2017
0

1
1
Service Manual Versions and Revision
No. Version Release Date Revision
1 1.0 2007/01/18 Initial Release
Copyright
Copyright 2007 InnoLux Tech. Corp. Ltd
All Rights Reserved
This manual may not, in whole or in part, be copied, Photocopied, reproduced, translated, or converted to any
electronic or machine readable form without prior written permission of InnoLux Tech. Corp. Ltd.
Acer AL2017 Service Manual

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Table of Contents
CHAPTER 1- PRECAUTIONS & SAFETY NOTICES ..................................................................................................................... 3
1. SAFETY PRECAUTIONS ................................................................................................................................................. 3
2. PRODUCT SAFETY NOTICE........................................................................................................................................... 3
3. SERVICE NOTES............................................................................................................................................................... 3
CHAPTER 2- SERVICE TOOLS & EQUIPMENT REQUIRED ..................................................................................................... 4
CHAPTER 3- CIRCUIT THEORY ...................................................................................................................................................... 5
1. BLOCK DIAGRAM .............................................................................................................................. 錯誤! 尚未定義書籤。
2. INTERFACE BOARD DIAGRAM ........................................................................................................................................... 5
3. ELECTRONIC CIRCUIT THEORY ............................................................................................................................................... 6
4. INVERTER CIRCUIT ............................................................................................................................. 錯誤! 尚未定義書籤。
CHAPTER 4- DISASSEMBLY & ASSEMBLY ................................................................................................................................... 9
1. EXPLODED DIAGRAM ............................................................................................................................................................. 9
2. DISASSEMBLY BLOCK ........................................................................................................................................................... 10
3. ASSEMBLY BLOCK ................................................................................................................................................................ 11
CHAPTER 5- TEST AND ADJUSTMENT ........................................................................................................................................ 12
1. GENERAL POINTS ............................................................................................................................................................. 12
2. INPUT SIGNAL .................................................................................................................................................................. 13
3. FUNCTION CHECK........................................................................................................................................................... 14
4. DISPLAY CHECK............................................................................................................................................................... 15
5. PICTURE CHECK............................................................................................................................................................... 16
CHAPTER 6- TROUBLE SHOOTING.............................................................................................................................................. 19
1. NO POWER & LED OFF .............................................................................................................. 19 錯誤! 尚未定義書籤。
2. UNSTABLE POWER ................................................................................................................................................................ 20
3. NO RASTER ........................................................................................................................................................................... 21
4. BLACK SCREEN ..................................................................................................................................................................... 22
5. BAD SCREEN......................................................................................................................................................................... 23
6. WHITE SCREEN ..................................................................................................................................................................... 24
ATTACHMENT 1- BILL OF MATERIAL......................................................................................................................................... 25
ATTACHMENT 2- SCHEMATIC....................................................................................................................................................... 34
ATTACHMENT 3- PCB LAYOUT ..................................................................................................................................................... 44

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Chapter 1- PRECAUTIONS & SAFETY NOTICES
1. SAFETY PRECAUTIONS
This monitor is manufactured and tested on a ground principle that a user’s safety comes first.
However, improper used or installation may cause damage to the monitor as well as to the user.
WARNINGS:
 This monitor should be operated only at the correct power sources indicated on the label on the rear
of the monitor. If you’re unsure of the power supply in you residence, consult your local dealer or
Power Company.
 Do not try to repair the monitor by yourself, as it contains no user-serviceable parts. This monitor
should only be repaired by a qualified technician.
 Do not remove the monitor cabinet. There are high-voltage parts inside that may cause electric
shock to human bodies.
 Stop using the monitor if the cabinet is damaged. Have it checked by a service technician.
 Put your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable
immediately and consult your closed dealer.
 Always unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply
non-ammonia based cleaner onto the cloth, not directly onto the class screen.
 Do not place heavy objects on the monitor or power cord.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety visual inspections and the
protection afforded by them cannot necessarily be obtained by using replacement components rated
for higher voltage, wattage, etc. Before replacing any of these components read the parts list in this
manual carefully. The use of substitute replacement parts, which do not have the same safety
characteristics as specified in the parts list, may create shock, fire, or other hazards.
3. SERVICE NOTES
 When replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
 Keep wires away from high voltage, high temperature components and sharp edges.
 Keep wires in their original position so as to reduce interference.
 Adjustment of this product please refers to the user’ manual.

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Chapter 2- SERVICE TOOLS & EQUIPMENT REQUIRED
1. SIGNAL GENERATOR
2. MULTIMETER
3. SCREW DRIVER
4. OSCILLOSCOPE
5. Soldering IRON
6. SOLDER
7. VGA Cable (15pins point to point)
8. Color Analyzer
9. Myson412 ISP Board
10. EDID Board
11. EDID program file

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Chapter 3- CIRCUIT THEORY
1. Monitor Block Diagram
The LCD Monitor contains an interface board, and inverter/power/Audio board, keypad board and flat
panel. In Inverter/power/Audio board, power section supplies +14V & +5V for Inverter/Audio and
Interface board used. The inverter section drives the backlight of panel and the DC-DC conversion.
2. Interface BOARD DIAGRAM
A/D&
Scaler&MCU
Red
Green
Hsync
Vsync
Blue
VGA
DVI
(Option)
SDA
SCL
VGA
DDC
OSD
(EEprom)
Key-pad
Flash
DVI
DDC
To LCD
module
3. Electronic Circuit Theory
1.1 Switching Mode Power Supply
1.1.1 AC Current Input Circuit
P801 is a connector for connecting AC Power. F801 is a fuse to protect all the circuit. AC
input voltage is from 90v to 264V. R801 and R802 joined between two inputting main circuit to
prevent man from shock. L801 is used to clear up low frequency wave. C801 and C802 are used to
discharge the waves that L801 produced. High frequency waves are damped by C801 and C802.
D801 is a rectifier which composed of 4 build-in diodes, it inverts AC to DC.
1.1.2 High Voltage to Low Voltage Control Circuit
C804 is used to smooth the wave from rectifier. IC802 is a highly integrated PWM controller.
When rectified DC high voltage is applied to the HV pin during start-up, the MOSFET Q804 is
5

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initially off, and the Vcc pin capacitor is charged. When the Vcc pin voltage reaches approximately
14V, the control circuitry is activated and the soft-start begins. The soft-start circuit gradually
increases the duty cycle of the MOSFET from zero to the maximum value over approximately 4ms.
If no external feedback/supply current is fed into the FB pin by the end of the soft-start, the current
Setpoint will be above the fault level, FAULT flag is raised, if the FAULT duration exceeds 80ms,
the output controller disable resistor R808, R809, R810, R811 are for line over voltage
shutdown(OVP)
When PWM is turned off, the main current flow will be consumed through R804 and D802,
This will prevent MOSFET Q804 from being damaged under large current impulse and voltage
spike.
D803 and C807 to provide internal Auxiliary voltage to Vcc pin during normal operation.
Otherwise, error amplifier and feedback current input the FB pin for duty cycle control.
1.1.3 DC_5V and DC_16V Output Circuit
For DC 5V, D805 is used to rectify the inducted current. R828 and C814 are used to store
energy when current is reversed. The parts including C818, C822, C820,L803 are used to smooth
the current waves.
For DC 16V, D803 is used to rectify the inducted current. R827 and C813 are used to store
energy when current is reversed. The parts including C815, C817 and L802 are used to smooth the
current waves.
1.1.4 Feedback and OVP Protect Circuit
Pin R of IC803 is supplied 2.5-v stable voltage. It connects to 5V and 16V output through
R822, R823 and R824. R822, R823 and R824 are output sampling resistor. When the sampling
voltage more than 2.5V or less than 2.5V, current of FB IC802 will change, this can change the
voltage from T801.
OVP Protect Circuit: When output is overvoltage, the auxiliary winding voltage will be
increased, when it reaches about 14V. Q803 is triggered . It makes the IC802 Pin 1 exceed 5V, then
the IC802 output will be disabled.
Q801, R816, R817 and ZD803 make up of dummy loading circuit. For start-up sequence,
during 5V output take place high loading first, this dummy loading circuit operated to insure 16V
not be increased.
1.2 Interface Board Circuit
1.2.1 RGB CAPTURE
- Signal RED,GREEN,BLUE input through CN103 #1,#2,#3, via R105,FB101, R101,R106,
FB102 ,R102, R107,FB103,R103, Stop DC via C101, C102 and C103, and then enter into U104
(TSUM56AWHK) analog input terminal #59,#56,#54, and then TSUM56AWHK deals with signal
internally. D101, D102, D103 are ESD protector to prevent U104 from ESD.
- Signal DDC_SCL (series clock) inputs via CN103#15, and then passes through ZD104 Zener for
ESD protection, via R121, goes into EDID EEPROM IC U102 #6.
- Signal DDC_SDA (series data) inputs via CN102 #12, and then passes through ZD105 Zener for
ESD protection, via R122, goes into EDID EEPROM IC U102 #5.
- Signal TTL vertical sync. (Vsync) inputs via CN103 #14, and then clamped by D103 Zener, passes
through R116, and then goes into IC U104 #64.
- Signal TTL horizontal sync. (Hsync) inputs via CN103 #13, and then clamped by D102 Zener, passes
through FB104,R115, and then goes into IC U104 #63.
- CN103#5 is defined as cable detect pin, this detector realize passes through R113 ,go into U104#26,
and ZD109 is ESD protector.
- U102 +5V is supplied by PC via CN103#9 with ZD101 for ESD protection, or supplied by Monitor
self via D104.
- U102 is an EEPROM IC which is memory and EDID data saved in it.

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1.2.2 DVI CAPTURE
- Differential Signal input RX0+,RX0-,RX1+,RX1-,RX2+,RX2-,RXC+,RXC- through CN102
#18,#17,#10,#9,#2,#1,#23,#24 via R130, R131, R132, R133, R134, R135, R137, R138 enter into
U104 Digital input terminal #45,#46,#42,#43,#39,#40,#48,#49, and then TSUM56AWHK deals with
signal internally.
- Signal DDC_SCL (series clock) inputs via CN102#6, and then passes through ZD106 Zener for ESD
protection, via R126, goes into EDID EEPROM IC U101 #6.
- Signal DDC_SDA (series data) inputs via CN102 #7, and then passes through ZD107 Zener for
ESD protection, via R127, goes into EDID EEPROM IC U101 #5.
- CN102 #16 is defined as cable detect pin, this detector realize passes through R125 ,go into U104#27,
and D106 is ESD protector.
- U101 +5V is supplied by PC via CN102#14 with ZD108 for ESD protection, or supplied by Monitor
self via D107.
- U102 is an EEPROM IC which is memory and EDID data saved in it.
1.2.3 Buttons Control
- Button “Power” on front of bezel connects to scaler TSUMU58WHJ pin #4 through R159, via
CN102#8.
- Button “MENU” on front of bezel connects to scaler TSUMU58WHJ pin #119 through R153,via
CN102#1; Button “>” (Rihgt) on front bezel connects to scaler TSUMU58WHJ pin #120 through
R154,via CN102#2; Button “<” (Left) on front bezel connects to scaler TSUMU58WHJ pin #121
through R155,via CN102#3;Button “AUTO” on front bezel connects to scaler TSUMU58WHJ pin
#122 through R156,via CN102#4;
- U107 is an EEPROM IC which memory OSD setting and save the value adjusted by user.
- LED Indicator
When monitor normally working, scaler TSUMU58WHJ pin #124 sends out a low potential, via
R107, switch on Q105, then flows to CN102 #7, LED Green ON.
When in “Suspend” mode, scaler TSUMU58WHJ pin #123 sends out a low potential, via R102,
switch on Q102, then flows to CN102 #5, LED Amber ON.
1.2.4 Scaling IC (U104 tsum56AWHK)
- U104 #105~#114 output 8 bit even LVDS digital data to panel control circuit through CN106.
- U104 #118~#127 output 8 bit odd LVDS digital data to panel control circuit through CN106.
- U104 #75 output ”H” potential to make Q106 conducted, and then make Q103 conducted, +5V flow
to CN106#1~#3 as Panel Vdd .
- U104 #20 output,”L” ”H” potential to control Inverter on/off.
- U104 #21 outputs Brightness “PWM” signals to control CCFL brightness.
- TCLK by Crystal 14.318MHz input to U104 #32.
Please refer to tsum56AWHK Pin Assignments table in page
1.2.5 Regulator Circuit
- +5V is from powerboard CN103 #1 and CN102
- +3.3V generates from +5V through D116 and C168 filtering and U103 which is output +3.3V LDO
- +1.8V generates from +3.3V through C143 filtering and U108 which is output +1.8V LDO, for U104
used.
1.3 Inverter circuit
Power supply 5V then pass through R517 to IC501. The extra PWM pulse signal
(BRIGHTNESS signal) input to control IC through R512, R514, C510, The LCT pin is set to a DC
voltage of 0.7V by using a resistor divider(R507, R516), change the duty of PWM pulse, will
regulate the lamp current. The ON/OFF voltage connect to pin10 of IC501 through D501, R501,

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A voltage of 2V to pin10 of IC501 enables the IC and activates the striking timer. The SSTCMP
pin of IC501 performs the soft function, the C511 set the time of SST. The operation frequency
determined by external capacitor C512, C521 and resistor R508 connected at CT pin of IC501.
C515 connect the TIMER pin of IC501, the capacitor to set striking time and shunt down delay
time. DRV!, DRV2 output for power MOSFET U501, U502.
OZ9938 provides two drive signals for U501, U502, and they work in push pull topology
driving, two transformers are connected in parallel with each transformer driving two lamps in
series. Turning each N-Channel MOSFET “on/off” complementarily, produces an alternating
current through the transformer primary and secondary. The “on” duration of the switches
determines the amount of energy delivered to the CCFLs. R504, C504, R505, C505, R532, C529,
R530, C522 are snubber networks, they suppress Voltage transient spike in drain of power
MOSFET.
R506, R510, C509, C513, C514, R525, R531, C528, C525, and C527 are connected between
high voltage output connector and ground, the divided AC voltage is inverted DC voltage through
D502, D503, D508, and D509. The sense voltage feed back to VSEN (pin 6 of IC501) for an over
voltage/over current condition during normal operation. R528, R533,R523,R536 are current sense
resistor, current sense signal feed back to Isense (pin 5 of IC501) for lamp “ON” detection.

Acer Service Manual
Chapter 4- Disassembly & Assembly
1. Exploded Diagram
Exploded drawing(With DVI)
9

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Exploded drawing(W/O DVI)
(We will update later)

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2. Disassembly Block
4. LE2018 BOM Structure
11
PCBA INV.&DC-DC *1
M3*5,Zn ROHS *4
M3*6,W/W-SPR Zn ROHS *1
PCBA I/F BOARD *1
CABLE 30 PIN FFC
BOLT,#4-40x11.8,Ni ROHS *4
TAPE ACE *3
M3*5
,
Zn ROHS *1
PANEL CMO M201P1-L01
ASSY PANEL*1
CHASSIS *1
Gasket,W8*H3*L50*1
Foil,AL,L60*W35*1
KEY PAD*1
CABLE *1
T3*6
,
Zn ROHS *1
BACK COVER*1
ASSY BEZEL*1
BEZEL*1
BUTTON,POWER KEY*1
BUTTON,FUNCTION*1
LENS*1
ASSY STAND*1
SCREW,P,CROSS,M4*8,BLA
CK,NL(NYLOK)
SCREW,B,CROSS,T.T-4*8,BL
K ROHS*2
LE 2018
LCD Monitor
STAND*1
HINGE*1
BRACKET FINGER*1
SCREW,B,CROSS,W/W-SPR,M4*
20,Zn ROHS *3
ASSY BASE*1
BASE*1
RUBBER*4
GASKET*1
PLATE,BASE*1
T4*6
,
Zn
,
ROHS *2
HINGE COVER*1
SPEAKER*1

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5. LE2018 DIS-assembly Block
12
Note:
The DIS assembly direction please following direction of arrowhead
ASSY PANEL UNIT
CHASSIS *1
PCBA I/F BOARD *1
PCBA INV.&DC-DC *1
CABLE KEYPAD*1
CABLE 30P FFC
BOLT,#4-40x11.8,Ni ROHS *4
M3*5,Ni ROHS *5
TAPE ACE *3
M3*6,W/W-SPR Zn ROHS*1
Gasket,W8*H3*L50*1
Foil,AL,L60*W35*1
ASSY, BASE
BASE*1
RUBBER FOOT *4
GASKET*1
PLATE,BASE*1
T4*6,Zn, ROHS *2
BACK COVER
ASSY STAND
M4*8,Black Zn,NL ROHS *4
SCREW,B,CROSS,T.T-4*8,BLK
ROHS*2
BRACKET FINGER *1
HINGE *1
STAND
SCREW,B,CROSS,W/W-SPR,M4*20,Zn ROHS *3
ASSY FRONT BEZEL
LE 2018
LCD Monitor
FRONT BEZEL *1
FUNCTION KEY *1
POWER BUTTON *1
LED LENS
HINGE COVER*1
SPEAKER*1
PANEL CMO M201P1-L01

Acer Service Manual
Process To Access Factory Mode
Power Off
Press “AUTO＂& ＂MENU＂button at
the same time
Power On
Release the “AUTO＂& ＂MENU＂
button
Press “MENU＂Button
Press “<＂Button
Press “Menu＂Button
Enter the factory Mode
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Chapter 5- TEST AND ADJUSTMENT
1. GENERAL POINTS
1.1 Test Equipment or Tool
1.1.1 Test pattern generator: PC or video pattern generator (Chroma-2326/2160/2130)
1.1.2 Color analyzer: Chroma-7120
1.1.3 Power meter: AC Source Chroma-6408
1.1.4 Electrical safety tester: Chroma (Zentech) 9032A
1.1.5 Stereo source: Music or signal generator input
1.1.6 Auto shock fixture
1.1.7 Temperature and humidity sensor
1.1.8 DDC interface card and EDID file
1.2 Preset Test Pattern
1.2.1 Crosshatch (General-1)
1.2.2 Gray Bar (16 & 32 levels)
1.2.3 Full White
1.2.4 Aging (Burn-in) Pattern: Full Red, Green, Blue, White, and Black
1.3 AC input
All measurements mentioned hereafter are carried out at a normal mains voltage (90 - 264 VAC for the
model with full range power supply, unless otherwise stated)
1.4 Observation Distance
1.4.1 Observation distance from eyes to panel is defined as 50cm
1.4.2 Visual distance from instrument to panel is defined as 20cm
1.5 Key Function Description
1.5.1 Control buttons on the front bezel
CONTROL
KEY KEYS FUNCTION
[AUTO] A. When OSD un-displays, press [AUTO] to perform auto-adjustment
B. When OSD displays, press [AUTO] to return to previous level menu
[MENU]
A. When OSD isn’t shown on screen, press [MENU] to enter OSD interface
B. When OSD displays, press [MENU] to perform function of menu icon that is
highlight or enter next level menu
[►], [◄]
A. When “MENU OSD” displays, press these keys to change the contents of an
adjustment item, or change an adjustment value
B. When “MENU OSD” un-displays, press [►],adjust volume high;
press [◄]adjust volume low
[POWER] Power on or power off the monitor
1.5.2 Hot Key Operation
HOT KEY OPERATION
FUNCTION
AUTO ◄►MENU POWE
R
DESCRIPTION
FACTORY
MODE ●●ON
Press [AUTO] & [MENU] at the same
time, and then press [POWER] for DC
power on. OSD menu will be shown
with “F” on the left top. Select “F” for
entering factory mode.

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1.6 Burn-in (Aging) Pattern
1.6.1 Burn-in patterns are: full Red, Green, Blue, White and Blac
1.6.2 Stop burn-in pattern by providing with video signal from D-sub connector
1.6.3 Enter or exit burn-in mode by setting “burn-in” to be “on” or “off” in the factory mode
1.7 Warm Up
All test units have to be done warm up after at least 2 hours in a room with temperature of 40±5°C.
(Except particular requirement)
2. INPUT SIGNAL
2.1 Video Signal Input
2.1.1 VESA Analog
The video input consists of red, green, and blue signals. The video signals are analog levels, where
0V corresponds to black and 700mV is the maximum signal amplitude. Input impedance of video
pins is 75 ohm ±1%.
Sync signal input
The capability of sync signal inputs shall include separate sync. Input impedance: 2k2 ohms the
signals are defined as follow:
Separate sync TTL level, Positive/Negative
2.1.2 Input signal mode
PRESET TEST MODE TIMING
Resolution H-Freq.
(kHz) V-Freq. (Hz) Dot Clock (MHz) Mode
31.5 60.0 25.175
37.9 72.0 31.500
640 x 480
37.5 75.0 31.500
35.1 56.0 36.000
37.9 60.0 40.000
48.1 72.0 50.000
800 x 600
46.9 75.0 49.500
48.4 60.0 65.000
56.5 70.0 75.000
1024 x 768
60.0 75.0 78.750
1152 x 864 67.5 75.0 108.000
1280 x 960 60.0 60.0 108.000
64.0 60.0 108.000
1280 x 1024 80.0 75.0 135.000
65.371 59.978 121.75
1400 x 1050 82.28 74.87 156.0
VESA Standard
640 x 480 35.0 66.7 30.200
832 x 624 49.7 74.6 57.300
1152 x 870 68.7 75.0 100.000
Power Macintosh
series
2.1.3 VGA signal cable
15 pin D-sub VGA connector of signal cable.
2.1.4 Interface
Analog signal: The input signals are applied to display through D-sub cable.

Acer Service Manual
Length: 1.8 m +/- 50 mm (fixed)
Connector type: D-sub male.
With DDC_2B pin assignments.
Blue connector thumb-operated jack screws
Pin Assignment:
16
PIN No. SIGNAL PIN No. SIGNAL
1 Red video input 9 VGA +5V
GND2 Green video input 10
3 Blue video input 11 GND
4 GND 12 Serial data line (SDA)
5 Cable detect 13 H. Sync / H+V
6 Red video GND 14 V. Sync
7 Green video GND 15 Data clock line (SCL)
8 Blue video GND
3. FUNCTION CHECK
3.1 OSD Function Test
3.1.1 Test mode: 1400x1050@ 60 Hz
3.1.2 Test pattern: pattern #1 of crosshatch (GENERAL-1)
3.1.3 Check single key function and hot key function about key “Power”, “Menu”,” ►”, “◄“,
“Exit/Auto”, it should operate normally
3.2 Screen Picture Check
3.2.1 Test mode: 1400x1050 @ 60 Hz
3.2.2 Test pattern: pattern #1 of crosshatch (GENERAL-1)
3.2.3 Select OSD menu to execute ‘Auto’ function, screen picture shouldn’t appear abnormal
phenomenon and picture on screen should fit in with active display screen.
3.3 Auto Color Balance
3.3.1 Test mode: 1400x1050 @ 60 Hz
3.3.2 Test pattern: pattern #42 of 5-MOSAIC
3.3.3 Enter "Factory Mode" pressing "Auto color" key, and execute "AUTO".
3.4 Timing Check
3.4.1 Test mode: Refer to preset timing table and power saving mode
3.4.2 Test pattern: pattern #1 of crosshatch (GENERAL-1)
3.4.3 After change above timing and execute “Auto” function automatically, picture should fit in with
active display screen.
3.4.4 Under power saving mode, LED lamp on the key board should be orange
3.5 Power Consumption Function Test
3.5.1 Test mode: 1400x1050 @ 60 Hz
3.5.2 Test pattern: pattern #41 of “WHITE”
3.5.3 Adjusting both brightness value to maximum,
3.5.4 Measure power consumption as the following

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Status Power Consumption LED Display
Normal < 42W(with audio) Green
Standby (No H/V
sync) < 1W Orange
Power off < 1W No display
3.6 VGA Cable Detect Test
If VGA cable of LCD monitor isn’t connected to video pattern generator or PC, “NO SIGNAL” should
be shown on screen.
3.7 Hi-Pot test
Test condition:
a. high voltage 2.3KV(DC)
b. leakage current
10mA
c. rising time 1 sec.
d. test time 3sec.
3.8 Grounding Test
Test condition:
a. test current 30A / 2 sec
b. impedance < 0.1Ω
3.9 Bumping Test
3.9.1 Test mode: 1400x1050 @ 60 Hz;
3.9.2 Test pattern: pattern #1 of crosshatch (GENERAL-1)
3.9.3 To shock LCD monitor lightly at the center of rear cover and edges with 1~2kg/cm2 force for
three times, no abnormal phenomenon is found on panel screen.
4. DISPLAY CHECK
4.1 Panel Flicker Check
Connect LCD monitor to PC, set LCD monitor to be timing of 14400x1050@60 Hz, adjust brightness to
be default value (brightness at maximum), execute “Auto” function, and then check picture of shut
down under windows 98 operating system, or flicker-pattern of pixel on-off. It should be that no flicker
be found on panel screen.
4.2 Panel Defect Inspection
4.2.1 Test mode: 1400 x 1050@60Hz
4.2.2 Test pattern: Crosshatch/Full white/Red/Green/Blue/Black/16 color bar/64 gray bars
4.2.3 Display quality must be (according to DIN 13406-2 pixel fault class II)
Defect Type Specification Major Minor
Bright dot defect THD ․
Dark dot defect THD ․
Total bright and dark dots THD ․
Bright Dots – 2 Adjacent B THD ․
Bright Dots – 3 or more Adjacent THD ․
Black Dots – 2 Adjacent B THD ․
Black Dots – 3 or more Adjacent THD ․
Distance between defect dots THD ․
Distance between Dark dots THD ․
Note 1: Dot defect is defined as the defective area is not larger than 50% of the dot area. Bright Dot is

Acer Service Manual
defined 5% transmission ND filter.
Note 2: Light Leakage: There shall not be visible light around the customer’s bezel after assembly in
normal View angle.
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5. PICTURE CHECK
5.1 Check brightness uniformity
5.1.1 Test mode: 1400x1050 @ 60 Hz
5.1.2 Test pattern: pattern #41 of “WHITE”
5.1.3 Test tool: Color Analyzer Chroma7120
Defect Type Specification Size Count (N) Majo
r
Minor
Black spots which appear
when B/L operating
Dot Shape(Particle、Scratch
and Bubbles in Display area
or on The Polarizer)
●
0.15mm ≤D ≤0. 5 mm N ≤3
L ≤0.5mm and W ≤0.05 mm Ignored
0.5mm < L ≤5mm and
0.05mm < W ≤0.1mm N ≤4
Line Shape
(Particles、Scratch、Fiber and
Bubbles in display area or on
The Polarizer)
●
L > 5mm or W > 0.1mm N = 0
There should be non-uniformity through
5% transparency of filter or judge by limit
sample if necessary.
Display non-uniformity ●
Scratch ●
No harm
Dirt ●
Wrap No harm ●
Bezel
Sunken No harm ●
No label ●
Invert label ●
No
Broken ●
Dirt Word can be read. ●
Not clear ●
Label
Word out of ●
h
Mistake No ●
Position Be attached on right position ●
Not enough No ●
Screw Limp No ●
Connecto Connection No bend on pins and damage ●
tt
FPC/FFC Broken No ●

Acer Service Manual
5.1.4 Set brightness and contrast to be maximum, apply pattern as Fig.3, it should be the following
requirement:
%≥75
)(backlightpointsnineofluminanceMax.
)(backlightpointsnineofluminanceMin.
19
Fig. 3
5.2 Color Temperature Check
5.2.1 Test mode: 1400x1050 @ 60 Hz
5.2.2 Test pattern: pattern #41 of “WHITE”
5.2.3 Test tool: Color Analyzer Chroma7120
5.2.4 Set brightness to be maximum and contrast to be 50%, measure color coordinate and luminance by
color analyzer as the following:
Chromaticity Coordinate
Mode x y
9300K 0.283 ± 0.030 0.298 ± 0.030
USER / /
6500K 0.313 ± 0.030 0.329 ± 0.030
5.3 Brightness Out (Video signal input 700mV ± 2%)
5.3.1 Test mode: 1400x1050 @ 60 Hz
5.3.2 Test pattern: pattern #41 of “WHITE”
5.3.3 Test tool: Color Analyzer Chroma7120
Set brightness and contrast to be maximum with white pattern, to measure the screen center, the
light output shall be >= BL cd/m2
Mode BL (cd/cm2) Remark
CMO M201P1-L03 220
5.4 DDC Data Check
5.4.1 EDID program
5.4.2 Execute main program for EDID writing (refer to model type), using scanner for barcode
123
45
L/2 L/4
W/4
6
W/2
8
79