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Service Manual
LCD Monitor Acer V173
-0-
1
Table of Contents
Important Safety Notice .........................................................................................01
01 Product Specification ..........................................................................................03
02 Flat Panel Specification .......................................................................................20
03 Exploded Diagram ..............................................................................................37
04 Troubleshooting ....................................................................................................41
05 Spare Parts List ...................................................................................................50
06 Schematics and Layouts.......................................................................................51
07 Assembly and Disassembly ................................................................................57
Appendix : User's manual
Copyright
Copyright 2008 Acer Incorprated
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 Acer
Incorporated.
Acer V173 Service Manual
1
Important Safety Notice
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.
Warning:
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.
2
01 Product Specification
1. General:
ACER BV173 is designed with LVDS interface and dual (VGA&DVI) input, it featured with embedded universal AC
power supplies. It's a green product and meets all ROHS standard. The power button and display control buttons
are on the front of the monitor. The monitors shall automatically display lower resolution video modes into
1280x1024 full screen display .The image can be adjusted through OSD control.
1.1 Features
Features Specifications
Maximum resolution 1280 x 1024 @ 75Hz
Back light system 4 CCFL
Actual Resolution display SXGA Resolution (1280x1024)
Pixel pitch 0.264(H) x 0.264(V)
Display area 337.920(H)x270.336(V) (17.0-inch diagonal)
Contrast ratio based on the following panel source in the table below
Response time (Tr +Tf ) 5 ms (Typ);
10%-90% @ Ta=25°C 10 ms (max)
Viewing angle (H/V) based on the following panel source in the table below
Input interface Dual (VGA&DVI)
Audio amplifier Without Audio
Power management Compatible with Energy Star
Plug & Play VESA DDC 2B
University AC power supply 100V 240V AC, 50Hz 60Hz
English(US), French, Italian, Spanish, Dutch, Japanese
OSD language
(Factory Presetting Mode is Japanese)
Attached table of Panel source:
Brightness(cd/m²) Contrast Ratio View Angle
Panel Source Remark
Min. Typ. Min. Typ. Hor. Ver.
MT170EN01_VC 250 300 700 1000 80°/80° 80°/80° INL
1.2 Checking contents
VGA DVI User's Warranty Quick-start Installation
Items
cable cable manual card Guide Guide
Description 1.8 1.8 Multi English
m
2. Operation Specifications
The unit should suffer no visible cosmetic damage and should operate with no degradation in display quality during exposure to the
operating conditions and after exposure to the non-operating conditions, in any sequence.
2.1 Environmental conditions
Operating Specification
Temperature range 5°C to 35°C
Relative humidity 20% to 80%
Altitude 0 to 3048M (10000 ft)
3
Storage
Temperature range -20°C to 60°C
Relative humidity 5% to 80%
Altitude 0 to 9144M (30000 ft)
2.2 Safety, EMC, Ergonomics and Compatibility Requirements
Items Description
UL/ C TUV/ CCC Other
Safety
G
FC CE CCC VCC
EMC
TC TC MPR
Ergonomics O
O
Windows Windows 2000 Windows XP
Compatibility
/
/
Power Energy Star
Management
Note: TCO99 is for black model; TCO03 is for white model
2.3 Electrostatic Discharge Requirements
Item Condition Spec
Contact discharge : 4KV
Contact discharge : 8KV
Electrostatic Discharge IEC61000-4-2(EN55024)
Air discharge : 8KV
Air discharge : 15KV
2.4 Reliability
Items Condition Spec Note
MTBF 50,000 Hours Excluding the LCD, CCFL
CCFL Life time Luminance becomes 50% 40,000 Hours(min) Note1
Note1. Display an all WHITE field at mid Brightness and Contrast settings.
3. Electrical Characteristics and Performance
3.1 Main Power Supply
The power supply unit built in the cabinet of a liquid crystal display monitor.
Items Condition Spec Note
AC Input Voltage Range Universal input full range 100~240VAC /50~60Hz
AC Input Current 100Vac 1.2A(max)
240Vac 0.6A(max)
AC Frequency Range 100Vac 47Hz 63Hz
240Vac
Inrush Current 100Vac,cold star,25°C 40A (max) Notes: 1. 2.
240Vac,cold star,25°C 60A(max)
Regulator Efficiency DC output full loading 80%
Ripple and Noise +14V output <300mV
4
+5V output <150mv
DC Output Voltage and Current 13.5V-15.6V 1.4A(typ.),1.8A(max)
4.9V-5.3V 1.1A(typ.),1.4A(max)
Power consumption without Audio 35W
Protection See Table-1
Power management See Table-2
Notes: 1. Before each test, the buck capacitor need to be discharged.
2. Before each test, it must be 10 minutes at least after the latest test.
Table-1
Protection Condition Spec
SCP(short circuit protection) with auto-recovery function
OPP(Over power protection) nominal AC input 42W
Table-2
Status H-sync V-sync Video Power LED
Power On on on active < 35W Blue
off on blanked < 2W Amber
Power Saving on off blanked < 2W Amber
off off blanked < 2W Amber
Power Off -- -- -- < 1W Off
3.2 Backlight Power Supply
Items Specification
Panel INL MT170EN01_VC,
Lamp 4 CCFL
Input Voltage 13.5V-15.6V
Input current 1.4A(typ.),1.8A(max)
5.5V Von 2.0 V
On/Off switch level
-0.3v Voff 0.8 V
35%~100%
Brightness PWM duty
*PWM:High=3.3V(3.00~3.60V),Low=0.0V,Frequency=4.0*V-Freq(Hz)
CCFL operating Voltage See Attached Table-2
CCFL Current See Attached Table-2
CCFL startup voltage See Attached Table-1
Operating frequency 40~60KHz
Protect delay time >1 second
Efficiency 75% (with dummy load)
Table-1
No Load Voltage:
Item Symbol Min. Typ. Max. Unit Remark
No Load Voltage Vs 1700 --- --- Vrms INL MT170EN01_VC
Table-2
On Load Function:
Item Symbol Min. Typ. Max. Unit Remark
5
Frequency F 40.0 50 60 kHz @Brightness=3.3V
Output Current for
IL 3.0 7.0 8.0 mArms INL MT170EN01_VC
One Lamp
Operating Voltage Vo --- 610 --- Vrms INL MT170EN01_VC
Kick Off Voltage @Vin=13.5V
T 1.0 1.5 --- S
Hold Up Time Brightness=3.3V
3.3 Brightness output
The test to verify specifications in this section shall be performed under the following standard conditions unless
otherwise noted. The test standard conditions are:
Temperature : 25 ± 5°C
AC line input voltage : 110Vac / 60Hz or 220Vac / 50Hz.
Warm-up time : 30 minutes minimum
Video Resolution : 1280x1024@60Hz
Video input signal : 700mV ± 2%
LCD Module BL
MT170EN01_VC (InnoLux) >=250cd/m*m
Set brightness control and also contrast control at maximum, to measure the screen center, the light output shall BL
cd/m2 (as panel spec)
3.4 White balance adjustment
The test standard conditions refer to Sec 4.3.
Chromaticity Coordinate
Mode
x y
Cool 9300K 0.283 ± 0.030 0.298 ± 0.030
User Default Default Default
Warm 6500K 0.313 ± 0.030 0.329 ± 0.030
3.5 Brightness uniformity
The test standard conditions refer to Sec 4.3.
Set contrast control and brightness at the maximum, apply pattern as Fig.1, it should meet the following
requirement:
Min. luminance of nine points (backlight)
75%
Max. luminance of nine points (backlight)
6
4. Input / Output Signal Specifications
4.1 Signal Interface
Items Condition Spec OK Note
Color: Gray
15 pin D-Sub
Signal Cable Length: 1800 +/- 20 mm
DVI NA
Signal type Separate analog R,G,B For 15 pin D-sub
700 mV +/- 5% (peak to
Analog Level
peak)
Impedance 75 Ohms +/- 2% Ohms
Separate H/V-sync For 15 pin D-sub
Signal type
(Positive/Negative)
Logic High: 2.0V ~ 5.5V Refer to VESA VSIS
Sync
Level Logic Low: 0V ~ 0.8V Standard V1R1
(TTL level)
Impedance 1.0K Ohm 1.0K for application
4.2 Signal Timing
Through D-SUB connectors, this unit can support FH= 31.5 ~ 80 KHz, Fv=56 ~ 75Hz and SXGA
display modes as below:
Resolution H-Freq. (kHz) V-Freq. (Hz) Dot Clock (MHz) Mode
31.5 60.0 25.175
640 x 480 37.9 72.0 31.500
37.5 75.0 31.500
35.1 56.0 36.000
37.9 60.0 40.000 VESA
800 x 600
48.1 72.0 50.000 IBM-AT Compatible
46.9 75.0 49.500 machine
48.4 60.0 65.000 PC-9800 series
1024 x 768 56.5 70.0 75.000
60.0 75.0 78.750
64.0 60.0 108.000
1280 x 1024
80.0 75.0 135.000
640 x 350 31.5 70.0 25.175
US/IBM Text
720 x 400 31.5 70.0 28.322
832 x 624 49.7 74.6 57.283
60.2 75.0 80.000 Power Macintosh series
1024 x 768
48.8 60.0 64.000
4.3 Timing Requirements
Item Condition Specification
Sync polarity: (+) or (-)
Horizontal 31.5 ~ 80 KHz.
Sync polarity: (+) or (-)
Vertical 56-75Hz
Excluding
Out of range Horizontal 31.5~80 KHz or Message "Input Not Supported" on screen
Vertical 56-75 Hz
Cable not
No VGA cable Message `'No Signal'' on screen
connect
4.4 DDC Data
7
EDID Standard Compliance
EDID File Format: VESA's EDID Standard Version #3, Revision #0,
EDID Structure : Version #1, Revision #3.
EDID Data Table : See the attached table (for example)
EDID Table
For InnoLux MT170EN01_VC Pane
4.1.1 V173 VGA EDID table (INL VC 17' Panel)
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 00 FF FF FF FF FF FF 00 04 72 19 00 00 00 00 00
1 00 00 01 03 08 22 1B 78 EA DC 55 A3 59 48 9E 24
2 11 50 54 BF EF 00 01 01 01 01 01 01 01 01 01 01
3 01 01 01 01 01 01 30 2A 00 98 51 00 2A 40 30 70
4 13 00 52 0E 11 00 00 1E 00 00 00 FD 00 38 4B 1E
5 53 0E 00 0A 20 20 20 20 20 20 00 00 00 FF 00 30
6 30 30 30 30 30 30 30 30 30 30 30 0A 00 00 00 FC
7 00 56 31 37 33 0A 20 20 20 20 20 20 20 20 00 CS
4.1.2 V173 DVI EDID table (INL VC 17' Panel)
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 00 FF FF FF FF FF FF 00 04 72 19 00 00 00 00 00
1 00 00 01 03 80 22 1B 78 EA DC 55 A3 59 48 9E 24
2 11 50 54 BF EF 00 01 01 01 01 01 01 01 01 01 01
3 01 01 01 01 01 01 30 2A 00 98 51 00 2A 40 30 70
4 13 00 52 0E 11 00 00 1E 00 00 00 FD 00 38 4B 1E
5 53 0E 00 0A 20 20 20 20 20 20 00 00 00 FF 00 30
6 30 30 30 30 30 30 30 30 30 30 30 0A 00 00 00 FC
7 00 56 31 37 33 0A 20 20 20 20 20 20 20 20 00 CS
5. Function Specifications
5.1 Panel General Specifications
All the tests to verify specifications in this section shall be performed under the following standard conditions unless
otherwise noted. The standard conditions are:
Temperature : 25 ± 5°C
AC line input voltage : 110Vac / 60Hz or 220Vac / 50Hz.
Warm-up time : 30 minutes minimum
Checking display modes : All the specified modes
5.1.1 General Specifications
Panel Source INNOLUX`
Model name MT170EN01_VC
Display Area 337.9(H) X 270.3(V)
Pixel Pitch 0.264x0.264
Display Colors 16.2 Million (each 6-bit + 2-bit FRC)
8
Number of Pixel 1280x1024 pixels
Pixel
RGB vertical stripe
Arrangement
Brightness 300cd/m2 (Typ.) 250cd/m2 (Min.)
Contrast Ratio 800:1(Typ.) 600:1(Min.)
Viewing Angle Hor:160°, Ver: 160°(Typ., CR>=10)
Display Mode Normally White
Frame rate 75Hz
Response Time Tr + Tf = 5ms Typical
Surface Treatment Hard coating (3H), Anti-glare treatment
Lamp x4
Outline
358.5(W)x296.5(H)x17.0(D)
Dimension
5.1.2 LCD Module Defects
LCD module defects check follow to the IIS.
5.2 Keypad Function
5.2.1 Control buttons on the front bezel
CONTROL KEY KEYS FUNCTION
A. When OSD un-displays, press [AUTO] to perform auto-adjustment
B. When OSD displays, press [AUTO] to return to previous level menu
[AUTO]
C. When "e Color OSD" OSD displays, press [AUTO] to exit the OSD
A. When OSD isn't shown on screen, press [MENU] to enter OSD interface. The OSD
interface uses "ACER e Color Management" and "User" to instead "Contrast" and
"Brightness" separately. When press "ACER e Color Management" to show "e Color
OSD", and press "User" to show OSD interface before. The translations of "ACER e
[MENU]
Color Management" and "User" are always English.
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, if it is with audio, press [] to show "Audio" OSD and
increase the volume, press [] to show "Audio" OSD and decrease the volume; else
it has no use to press these keys.
A. When OSD un-displays, press [e Color] to show "e Color OSD", and press again the
OSD can not disappear, but the time of "e Color OSD" disappearing is reset 10 second
[e Color ] again.
B. When OSD disappear not including "e Color OSD", press [e Color] to show "e Color
OSD" OSD, the OSD before disappears, but the parameters of it should be saved
[POWER] Power on or power off the monitor
9
5.2.2 Hot Key Operation
HOT KEY OPERATION
FUNCTION DESCRIPTION
e-Color AUTO MENU POWER
Press [E-Color] & [MENU] at the same time, and
then press [POWER] for DC power on. OSD
FACTORY MODE ON
menu will be shown with "F" on the left top.
Select "F" for entering factory mode.
5.3 OSD Structure
The On-Screen Display (OSD) shall be an easy to use icon based menu through keypad OSD buttons or
remote control unit. The unit shall leave the factory with all OSD controls set to their default values.
First Second Third Control Range Default Value
ACER e COLOR
Empowering
Management
Technology
User mode 50
Text mode 50
Contrast Standard mode 50
Graphics mode 60
Brightness Movie mode 56
User User mode 77
Text mode 44
Brightness Standard mode 77
Graphics mode 97
Movie mode 77
ACM OFF
Focus --- 0 ~ 100 Depend on each timing
Image
Clock --- 0 ~ 100 50 1
Horizontal --- 0 ~ 100 50
Position
Vertical --- 0 ~ 100 Depend on each timing
Warm (6500K) --- ---
Cool (9300K) --- ---
Color Red 0 ~ 100 80
User Green 0 ~ 100 80
Blue 0 ~ 100 80
Language NO-EMEA EMEA
English English --- --- English
Deutsch Deutsch --- ---
Español Español --- ---
Hollands --- ---
--- ---
Français Français --- ---
Italiano Italiano --- ---
10
Suomalain --- ---
en
Hor. Position --- 0 ~ 100 50
OSD Ver. Position --- 0 ~ 100 50
OSD Timeout --- 10~ 120 20
Analog --- --- ---
Input (Dual) Digital --- --- ---
DDCCI ON/OFF ON
Input (Analg
only)
DDCCI ON/OFF ON
Resolution --- --- ---
H. Freq --- --- ---
Info
V. Freq --- --- ---
S/N ETL000....0000(22)
Reset --- --- --- ---
Exit --- --- --- ---
Notes: 1. Clock default 50 is for Visa timing. Others depend on timing.
5.3.1 OSD Function Test
3.1.1 Test mode: 1280x1024 @ 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", "[e
Color ]" it should operate normally
5.3.2 Screen Picture Check
5.3.3 Test mode: 1280x1024 @ 60 Hz
5.3.4 Test pattern: pattern #1 of crosshatch (GENERAL-1)
5.3.5 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.
5.4 Auto Color Balance
5.4.1 Test mode: 640X480 @ 60 Hz
5.4.2 Test pattern: pattern #42 of 5 mosaic pattern
5.4.3 Enter "Factory Mode" pressing "MENU" key, execute "AUTO".
5.4.4 When Color Balance finished, Must push "POWER" key to exit "Factory mode", and restart.
5.5 Timing Check
5.5.1 Test mode: Refer to preset timing table and power saving mode
5.5.2 Test pattern: pattern #1 of crosshatch (GENERAL-1)
5.5.3 After change above timing and execute "Auto" function automatically, picture should fit in with active
display screen.
5.5.4 Under power saving mode, LED lamp on the key board should be orange
5.6 Power Consumption Function Test
5.6.1 Test mode: 1280x1024 @ 60 Hz
5.6.2 Test pattern: pattern #41 of "WHITE"
5.6.3 Adjusting both brightness value to maximum,
5.6.4 Measure power consumption as the following
Status Power Consumption LED Display
Normal < 35W Green
11
Standby (No H/V sync) < 1W Orange
Power off < 1W No display
5.7 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.
5.8 Hi-Pot test
Test condition:
a. high voltage 2.3KV(DC)
b. leakage current 10mA
c. rising time 1 sec.
d. test time 3 sec.
5.9 Grounding Test
Test condition:
a. test current 30A / 2 sec
b. impedance < 0.1
5.10 Bumping Test
5.10.1 Test mode: 1280x1024 @ 60 Hz;
5.10.2 Test pattern: pattern #1 of crosshatch (GENERAL-1)
5.10.3 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.
6. DISPLAY CHECK
6.1 Panel Flicker Check
Connect LCD monitor to PC, set LCD monitor to be timing of 1280x1024@60 Hz, adjust brightness to be
default value (brightness at maximum), execute "Auto" function, and then check picture of shut down under
windows operating system, or flicker-pattern of pixel on-off. It should be that no flicker be found on panel
screen.
6.2 Panel Defect Inspection
6.2.1 Test mode: 1280 x 1024@60Hz
6.2.2 Test pattern: Crosshatch/Full white/Red/Green/Blue/Black/16 color bar/64 gray bars
6.2.3 Display quality must be (according to DIN 13406-2 pixel fault class II)
Defect Type Specification Major Minor
N2 ( For AMLCD )
Bright Dots N 3 ( For LPL and INL)
N4 (green=0) (For CPT)
N5 ( For AMLCD )
Dark Dots
N 4 ( For CPT & LPL & INL )
N5
Total Bright and Dark Dots ( For AMLCD, LPL & INL )
N 4 (For CPT)
N 1 pair
( For LPL & INL )
Bright Dots 2 Adjacent
N 2 pair
(For AMLCD & CPT)
Bright Dots 3 or more Adjacent N 0 pair
Dark Dots 2 Adjacent N 2 pair
N 1 pair ( For AMLCD )
Dark Dots 3 or more Adjacent
N 0 pair ( For AMLCD, LPL & INL )
12
Distance between Bright dots L 15 mm
Distance between Dark dots L 15 mm
Note 1: Dot defect is defined as the defective area is not larger than 50% of the dot area. Bright Dot is 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.
Defect Type Specification Size Count (N) Major Minor
Dot Shape (Particle Scratch Black spots which appear when
and Bubbles in Display area or B/L operating
on The Polarizer)
0.1 D 0.7 mm (AMLCD) N4
0.15 D 0.5 mm (CPT & LPL) N4
0.05 D 0.15 mm (INL) N3
0.3mm L 5.0mm N 3
0.01W0.1mm (for Sam)
Line Shape (Particles, Scratch,
Fiber and Bubbles in display 1mm L 10mm N 4
area or on The Polarizer) 0.01W0.05mm (for LPL)
L 3mm N 4
W 0.1 mm (for CPT)
0.3mm L 10mm N 4
0.05mm W 0.15 mm (For INL)
There should be non-uniformity through 5%
Display non-uniformity
transparency of filter or judge by limit sample if
necessary.
Scratch
No harm
Dirt
Bezel
Wrap No harm
Sunken No harm
No label
Invert label No
Broken
Dirt Word can be read.
Label
Not clear
Word out of shape
Mistake No
Position Be attached on right position
Not enough No
Screw
Limp No
Connector Connection status No bend on pins and damage
FPC/FFC Broken No
7. SOP of firmware upgrade (Manufacturer of Scaler is RealTek)
7.1 Operational condition:
13
Equipment: PC, ISP card, signal cable and power cable.
ESD requirements: antistatic wrists, antistatic gloves (fingers), and connecting cable
Name of ISP program: RTDTool_4.6.exe
Manufacture of FW IC RTD 2525L
7.2 Operational steps:
1. Connection: connect PC to PCBA with signal cable, and then keep AC and DC in open state
2. Adjust ISP programming
Firstly, double click RTDTool_4.6.exe and open ISP program, then select "25XXV/2525L", and
RTD 2120 ISP button.
Secondly select Bank2 size which is 30.
14
Select Bank2
size: 30
Thirdly, click "64K"button and download FW file as below Figure 3.
15
Fourthly, click "64~96"button, and download extern FW file as below Figure 4 .
Fifthly, click"program"button as below, then you will see ISP will going on. There will be prompting if
programming is OK.
16
Program
button
Note: Please see the configure as below Figure 6.
Configure
Inform
Programming
speed
17
After connecting, AC
ON, DC ON
OK Flowing chart
Open ISP program
OK
Choose manufacturer
and model of FW IC
OK
LOAD FW files
OK
Click program
button
OK
Beginning Choose Config
and adjust
programming programming
OK NG
Turn off power if
programming is OK
7.3 Factory Mode
HOT KEY OPERATION
FUNCTION
AUTO MENU POWER
e Color
Press [e Color ] & [MENU] at the
same time, and then press
[POWER] for DC power on. OSD
FACTORY MODE ON
menu will be shown with "F" on the
left top. Select "F" for entering
factory mode.
18
02. Flat Panel Specification
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
03 Exploded Diagram
3.1. LCD Exploded drawing (All)
36
3.2 Assy Bezel Exploded drawing
37
3.3Assy BACK COVER Exploded drawing For VC panel
38
3.4 Assy BACK COVER Exploded drawing for AUO panel
39
04 Troubleshooting
1. Common Acknowledge
1.1 Monitor Block Diagram
The LCD Monitor contains an interface board, and inverter/power keypad board and flat panel. In
Inverter/power/Audio board, power section supplies +14V & +5V for Inverter and Interface board used.
The inverter section drives the backlight of panel and the DC-DC conversion.
Flat panel (LVDS interface) and CCFL
Inverter/Power
(Including AC/DC Power Interface Board
Supply , Inverter )
Keypad BD
AC input Host computer
Range 100V~240V (VGA/DVI signal input and DDC)
Audio input
- 2 Interface BOARD DIAGRAM
1.3 Electronic Circuit Theory
1.3.1 Switching Mode Power Supply
1.3.1.1 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
40
which composed of 4 build-in diodes, it inverts AC to DC.
1.3.1.2 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 Vcc pin during start-up, the MOSFET Q804 is initially
off, and the Vcc pin capacitor is charged. When the Vcc pin voltage reaches approximately 10V, 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 CS 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.
D804 and C807 to provide internal Auxiliary voltage to Vcc pin during normal operation.
Otherwise, error amplifier and feedback current input the CS pin for duty cycle control.
1.3.1.3 DC_5V and DC_14V 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 14V, 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.
1.3.1.4 Feedback and OVP Protect Circuit
Pin R of IC803 is supplied 2.5-v stable voltage. It connects to 5V and 14V 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 14V not be
increased.
I/F Board Circuit
1.3.2.1 RGB CAPTURE
- Signal RED,GREEN,BLUE input through CN103 #1,#2,#3, Stop DC via C123, C124 and C125,
and then enter into U104 (scaler) analog input terminal #16,#14,#12, and then scaler deals with
signal internally. EP102, EP103 EP104 are ESD protector to prevent U104 from ESD.
- Signal DDC_SCL (series clock) inputs via CN103#15, and then passes through EP109 for ESD
protection, goes into U102 (MCU) #5.
- Signal DDC_SDA (series data) inputs via CN103#12, and then passes through EP108 for ESD
protection, goes into U102 (MCU) #8.
- Signal TTL vertical sync. (Vsync) inputs via CN103 #14, and then clamped by EP107, passes
through R162, and then goes into IC U104 (scaler) #8.
- Signal TTL horizontal sync. (Hsync) inputs via CN103 #13, and then clamped by EP106, passes
through FB104, R163, and then goes into IC U104 (scaler) #9.
- CN103#5 is defined as cable detect pin, this detector realize passes through D101, D102, Q105
or through D101, D102, Q105, R107,Q106 change to MCU_VCC.
- U103 power is supplied by MCU_VCC.
- U103 is an EEPROM IC which is memory and EDID data saved in it.
1.3.2.2 Buttons Control
- Button "Power" on right side bezel connects to U102 (MCU) #9 through R134, via CN901#1.
- Button "E-Color" "AUTO""MENU" "UP" "DOWN "on right side bezel connects to U102 (MCU)
41
#14,#22,#10,#21 through R141,R138,R135,R140,via CN901 #5, #6, #8, #7.
- LED Indicator on Front Bezel
1 When press button "power", U102 (MCU) #1 sends out a low potential, via R130, flow to CN901 #2
on keypad, LED Blue ON.
2 When in "Suspend" mode, U102 (MCU) #48 sends out a low potential, via R129, flows to CN901 #4
on keypad, LED Amber ON.
1.3.2.3 Realtk CHIP U104 (scaler)&U102 (MCU)
- U104 (RTD2025L) #21~#28 output 8 bit even LVDS digital data to panel control circuit through
CN104.
- U104 (RTD2025L) #29~#36 output 8 bit odd LVDS digital data to panel control circuit through
CN104.
- U102 (RTD2120) #44 outputs Brightness "PWM" signals to control CCFL brightness.
- U102 (RTD2120) #39 output PPWR "H" potential to make Q104 conducted, and then make Q101
conducted, +5V flow to CN104#1~#3 as Panel VDD .
- U102 (RTD2120) #46 output CCFL_ON/OFF "H" potential to control Inverter on/off.
- TCLK by Crystal 24.000MHz input to U102 (RTD2120) #15, #16.
Please refer to RTD2120&RTD2025L Pin Assignments table in page.
1.3.2.4 Regulator Circuit
- +5V is from switching mode power supply for Panel used.
- +3.3V generates from +5V through C101 and C102 filtering and U101 which is output +3.3V LDO
to generate MCU_VCC for U102, U103 and TMDS_VDD for U104.
- +1.8V generates from +3.3V through Q110 and C134, C133, C135, C136, C137 for U104 used.
Inverter circuit
14VDC provides the power for IC501; the control signals Brightness and ON/OFF come from I/F
board. ON/OFF signal connect to pin8 of IC501 and makes IC501 enable. Brightness signal
connect to pin7 of IC501 and regulates the panel brightness, R510 , R511, C507 make up a
network of delaying time circuit . The striking frequency is determined by the external Resistor
R505 pin5 of IC505and r516. The operation frequency is determined by the external Resistor
R505 pin5 of IC505. the capacitor and resistrer connected to pin4 to set striking time and shunt
down delay time. BURST MODE dimming pulse frequency and duty is regulated by I/F board.
The output drives, include square pulses output of pin14,12,11 to drive MOSFET U501, U502, and
U501, U502 are N channel MOSFETs. U501 and U502 work as harf-bridge topology.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.
The current flowing through CCFL is sensed and regulated through sense resistor R502, R543.
The feedback voltage connected to Pin2 (ISEN), then compared with a interal reference
voltage ,resulting in PWM signal outputs to adjust output voltage.
Over Voltage Protection and over-current protection are monitored by the voltage on OV(Pin 1)
and LI (Pin2) During normal operation , if a CCFL is damaged or removed ,the voltage at OV
(Pin6) increases .Once the voltage at OV Pin exceeds 1.2V (OVPT Setting) the driver output
duty cycle is regulated and the shutdown delay timer is activated. Once over the delay time the
IC will shut down
42
1. No Power & Power LED Off
No power
Check primary Check circuit Check IC802,
rectifier voltage if short C804, T801
Check F801, P801,
D801
Check pin7 of
IC802 voltage Check R806, R807,
about 13V R808,
Check R808, R819,
Check pin8 of IC802
voltage about 2.5V
Check IC801 and
Check pin2 of IC802 secondry feedback
voltage is low
END
43
2. DC output voltage is unstable
Output voltage unstable
Check circuit Check ZD801, D803,
Check Vbe of
D805
Q801below 0.3V if short
Check Q801,Q802
Check R832,, IC801,
Check Pin R of
Check reference
IC803 voltage
voltage
about 2.5V
Check R822, R823
Check feedback Check vpin2-4of Check R815, c814,
circuit IC801 about1V R816
Check Vpin6 of
IC801 have output
Change IC
END
44
4. No Raster
No raster?
Yes
LED Blue?
Yes
Backlight can't
be turned on.
Yes
No
Is there 14Vdc Check power
voltage on pin9 supply
of IC501?
Yes
Is there high-level No Yes
voltage on pin8 of Is Ok R510?
Check I/F
IC501? board
Yes No
R501 open
Are connected rightly Connecting the
No output connector
CN501, CN502,
again
CN503 and CN504?
Yes
Is there instantaneously
pulse wave on pin14, No Yes
pin11 of IC501 at the Is Ok IC501? U501, U502 fail
moment of restart?
No
IC501 fail
Yes
No T501, T502 fail
Is T501, T502 ok?
Yes
END
Check feedback circuit
Isen,Vsen.(pin 1.2)
45
5. Black Screen
46
6. Bad Screen
47
7. White Screen
48
05 Spare parts List
8171J061A020R 8171J071A020R
OEM PART NO DESCRIPTION MOQ N/A N/A
50 1 0
791421300600R PCBA,I/F BOARD(VC,EMEA),LE17J0-610 ROHS
50 1 1
791401500000R PCBA,KEYPAD BOARD,LE9D0-612 ROHS
50 1 1
791421400600R PCBA,P/I BOARD,W/O SPK,LE17J0-622 ROHS
50 0 1
791421300700R PCBA,I/F BOARD(EMEA,W/O),LE17J0-710 ROHS
50 1 1
430300801670R HRN ASSY 2x4P 55mm UL1571#28,ROHS
50 1 1
430300801760R HRN ASSY 2x4P to 8P 160mm UL1571#28,ROHS
50 1 1
430303001520R HRN LVDS FFC 30P 231mm W/MYLAR&Core ROHS
50 1 1
453070800210R PWR CORD 16A/250V BLK 6FT VDE H05VV-F 3G
50 1 1
453010100380R CABLE,D-SUB 15P MALE 6FT BLACK/BLUE, ROH
50 1 1
714030015900R ASSY, BEZEL,V,GRAY SILVER,LE17J0
50 1 1
714011202300R ASSY,STAND,BLACK,LE19D1
714020013200R ASSY,BASE,BLACK,LE17J0 50 1 1
501020220110R BACK COVER,V,W/O DVI,LE17J0 50 1 1
501240209800R BASE,COVER,V,BLACK,LE17J0 50 1 1
501020220020R COVER HINGE,BLACK RIGHT,LE19D1 50 1 1
501020220021R COVER HINGE,BLACK LEFT,LE19D1 50 1 1
701000007201R ASSY,CHASSIS,V,W/O DVI, LE17J0(VC) 50 1 0
701000007204R ASSY,CHASSIS,V,W/O DVI, LE17J0(AUO-B) 50 0 1
631102072741R LCP 17" MT170EN01-VC-G1,AM1700005C21(INN 10 1 0
631102072472R LCP 17"M170EG01-VD-0B(AUO)ROHS 10 0 1
49
06 Schematics and Layouts
5DVCC 3.3VCC
U101
5DVCC LD1117AL-3.3V
CN101 3 2
VIN VOUT
0 .1 /1 6 V
0 .1 /1 6 V
1 0 0 u /1 6 V
1 0 0 u /1 6 V
1
ADJ
2
In v e r te r
F rom P ow er &
3
4 BKLT-EN + +
C141 Shoule be canceled for the brightness is not so good
5
1
C 102
C 103
6 VBRI 2
C 101