AOC LM929 - 19" User manual
AOC LM929
1
19” LCD MONITOR
LM929
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 INFORMATIONAFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
SERVICE MANUAL
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AOC LM929
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Table of Content
Revision List…………………………………………………………………………………………………………. 4
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 Power Supply Requirements………………………………………………………………………………… 10
4.3 Factory Preset Display Modes……………………………………………………………………………….. 11
4.4 Panel Specification………………………………………………………………………………………….… 12
4.4.1 General Features………………………………………………………………………………………… 12
4.4.2 Display Characteristics………………………………………………………………………………….. 12
4.4.3 Optical Characteristics…………………………………………………………………………………… 12
4.4.4 Electrical Characteristics………………………………………………………………………………… 13
5. Block Diagram………………………………………………………………………………………………….… 14
5.1 Monitor Exploded View……………………………………………………………………………………….. 14
5.2 Software Flowing Chart……………………………………………………………………………….……… 15
5.3 Electrical Block Diagram……………………………………………………………………………………… 17
5.3.1 Main Board………………………………………………………………………………………………... 17
5.3.2 Inverter/Power Board………………………………………………………….…………………………. 18
6. Schematic……………………………………………………………………………………………………….… 19
6.1 Main Board…………………………………………………………………………………………………….. 19
6.2 Power Board……………………………………………………………………….………………………….. 26
6.3 Audio Board……………………………………………………………………….………………………….. 28
7. PCB Layout………………………………………………………………………………………………………. 29
7.1 Main Board…………………………………………………………………………………………………….. 29
7.2 Power Board………………………………………………………………………….……………………….. 30
7.3 Audio Board…………………………………………………………….……………………………………… 31
7.4 Key Board……………………………………………………………………………………………………… 31
7.5 CNPC Board…………………………………………………………………………………………………… 31
8. Maintainability……………………………………………………………………………………………………. 32
8.1 Equipments and Tools Requirement………………………………………………………………………… 32
8.2 Trouble Shooting…………………………………………………………………………………………….… 33
8.2.1 Main Board………………………………………………………………………………………………... 33
8.2.2 Power /Inverter Board……………………………………………………………………………………. 36
8.2.3 Keypad Board…………………………………………………………………………………………….. 38
9. White-Balance, Luminance Adjustment…………………………………………………………….……….. 39
10. EDID Content……………………………………………………………………………………………………. 41
11. BOM LIST………………………………………………………………………………………………………... 42
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1. Monitor Specifications
Items Description
Driving system TFT Color LCD
Type M190EN02
Size 48.0cm(19.0")
Pixel pitch 0.294mm (H) x 0.294mm (V)
Viewable angle 170(H) 170(V)
LCD Panel
Response time 25 ms
Sync. Type H/V TTL
15Pin Analog
Input Signal 24Pin Digital
H-Frequency 30kHz – 83kHz
Input
V-Frequency 50-75Hz
ON Mode ≤55W
Power Consumption OFF Mode ≤3W
Display Color 16.7M colors (RGB 8-bits data).
Contrast Ratio 700:1
Dot Clock 135MHz
White Luminance 250cd/m2
Max. Resolution 1280 x1024
Plug & Play VESA DDC2BTM
Power Source 100~240VAC,47~63Hz
Maximum Screen Size Horizontal : 376.32mm
Vertical: 301.056mm
Environmental
Conditions
Operating Temp: 0°C to 40°C
Storage Temp: -20°C to 60°C
Operating Humidity: 15% to 90%
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2. LCD Monitor Description
The LCD MONITOR will contain a main board, a power board, a keypad board and an audio board which house the
flat panel control logic, brightness control logic and DDC.
The power board will provideAC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.
Video signal, DDC
CCFT Drive.
PWPC Board
(
Include Ada
p
ter and Inverter
)
Flat Panel and
CCFL backlight
Main Board
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
AC-IN
100V-240V
Monitor Block Diagram
Audio board 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 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 Front Panel Control
NO. Name Within OSD Without OSD
1 Auto Exit OSD or back to previous menu Auto configuration
2 VOL-/ 1.Move the cursor to left
2.Decrease the value of the selected item Activate the audio menu
3 VOL+ / 1.Move the cursor to right
2.Increase the value of the selected item Activate the audio menu
4 MENU Select Function or select Sub menu Activate OSD main menu
5 POWER Power On / Off Power On / Off
6 Indicate light Green—On Red—Save Green—On Red—Save
AUTO
VOL- /
VOL+ /
MENU
POWER
LED
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3.3 Adjusting The Picture
The Description For Control Function:
Main Menu
Item
Main
Menu
Icon
Sub Menu
Item
Sub Menu
Icon 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 DoAuto Config
Image
Position V. Position
Adjust the vertical position of
the picture. 0-100 DoAuto 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.
Analog
N/A Select input signal from analog
(D-Sub) N/A N/A
Input Select
(Dual-Input
Model)
Digital N/A
Select input signal from digital
(DVI) N/A N/A
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H. Position
A
djust 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
1. D-SUB connector
Pin No. Description Pin No. Description
1. Red Video 9. No Pin!
2. Green Video 10. Logic Ground
3. Blue Video 11. Monitor Ground
4. Monitor Ground 12. DDC-Serial Data
5. DDC-Return 13. H-Sync
6. Red Ground 14. V-Sync
7. Green Ground 15. DDC-Serial Clock
8. Blue Ground
15 - Pin Color Display Signal Cable
15
610
11 15
2. DVI-D connector
Pin No. Description Pin No. Description
1. TMDS data 2－13. TMDS data 3＋(NC)
2. TMDS data 2＋14. ＋5V Power
3. TMDS data 2/4 Shield 15. GND (return for +5v,hsync, vsync)
4. TMDS data 4－(NC) 16. Hot Plug Detect
5. TMDS data 4＋(NC) 17. TMDS data 0－
6. DDC Clock 18.
TMDS data 0＋
7. DDC Data 19. TMDS data 0/5 Shield
8. Analog Vertical Sync 20. TMDS data 5－(NC)
9. TMDS data 1－21. TMDS data 5+(NC)
10. TMDS data 1＋22. TMDS Clock Shield
11. TMDS data 1/3 Shield 23. TMDS Clock +
12. TMDS data 3－(NC) 24. TMDS Clock －
24 - Pin Color Display Signal Cable
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4.2 Power Supply Requirement
A/C Line voltage range : 100 V ~ 240 V
A/C Line frequency range : 50 ±3Hz, 60 ±3Hz
Input Current : 1.5A max at 100V; 0.8A max at 240 V
Peak surge current : < 55Apeak 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
Voltage : 5VDC ± 5％; 12VDC± 5％
Current : 1.5Amp (5V) ；2 Amp (12V)
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4.3 Factory Preset Display Modes
VESA MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
+/- 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
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
XGA 1024x768@72Hz 1304 x 798 57.515 P 72.1 P 75.000
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
1024x768@60Hz 1312x813 48.780 N 60.001 N 64.000
XGA 1024x768@75Hz 1328x804 60.241 N 74.927 N 80.000
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4.4 Panel Specification
4.4.1 General Features
This specification applies to the 19.0 inch Color TFT-LCD Module M190EN02.
The display supports the SXGA (1280(H) x 1024(V)) screen format and 16.7M colors (RGB 8-bits data).
All input signals are 2 Channel LVDS interface compatible.
This module does not contain an inverter card for backlight.
4.4.2 Display Characteristics
4.4.3 Optical Characteristics
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5. Block Diagram
5.1 Monitor Exploded View
BEZEL 34G1239 PANEL MAIN FRAME 15G5960
KEY BOARD KEPC980KA1
SHIELD 85G651-5 REAR COVER
34G1240
W33G4673AGM-L
COVER VESA
HINGE ASSY
37G478-1
BUTTON FUNC
33G4642
COVER STAND
33G4648
SPK BOX COVER -R
34G1242
SPK BOX COVER-F
34G1241
STAND
34G1243 33G4650-1- X
HOLDER SPRING
BRACKET
15G6050-1
W33G4649-GM- T
HOLDER LIFT
STAND LIFT
34G1244
BASE
34G1245
BASE PLATE
15G5962-1
33G4646 GM L
COVER TILT
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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
W78E65P
(U601)
Scalar IC MST8131A
(Include ADC, OSD)
(U401)
EEPROM
M24C16
(U602)
D-Sub
Connector
(CN301)
EEPROM
M24C02
(U301)
H sync
V sync
RGB
DB15_SDA,
DB15
_
SCL
EPR_SDA
EPR_SCL
LCD Interface
(CN503)
EEPROM
M24C02
(U302)
DDC2_SDA,
DDC2_SCL
D-Data
D-Clock
Key Board
Control
Crystal
11.0592MHz
(X601)
Crystal
14.318MHz
(X401)
DVI-I only
Connector
(CN302)
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5.3.2 Inverter/Power Board
CN902
DIM
DIM
EMI filter
Bridge
Rectifier
and Filter
Start Circuit: R906、R907
PWM
Control IC
Transformer Rectifier
diode
AC input
12V
ON/OFF
Control
PWM
Control IC
Feedback
Circuit
OSC and
Output
Circuit DC Convert
Circuit MOSFET
Over
Voltage
Lamp
ON/OFF
Feedback
Circuit
Over
Voltage
Protect
IC101
5V
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6. Schematic
6.1 Main Board
715L1150-B
TOP
C
B
16Friday, March 12, 2004
Title
Size Document Number Rev
Date: Sheet of
VCC5V
PA[0..9]
VCPU
VCC2.5
VCC2.5
B5
5.PANEL INTERFACE
VLCD
PB[0..9]
PA[0..9]
VCC12V
VCC3.3
MST8131A for AOC
B4
2.POWER
onPanel_5V/3.3V
onBACKLITE
AdjBACKLITE
VCC3.3
VCC2.5
VAA1
VAA2
VAA3
VAA4
VCC5V
VCC12V
VLCD
VCPU
AD[0..3]
VAA1
VCC12V
B3
6.MCU
onBACKLITE
ST_DET2
onPANEL_5V/3.3V
SDA
INT
CSZ
DDC_DAT
ST_DET1
SCL
HWRESET
DDC_CLK
Volume
VCC5V
VCC12V
VCPU
TXD
RXD
AD[0..3]
VCC5V
VAA4
VAA2
VAA3
PB[0..9] VLCD
VLCD
VAA2VAA1
MST8131A SCHEMATIC
B1
3.INPUT
RIN
GIN
BIN
VSYNC
GNDR
GNDG
GNDB
ST_DET1 HSYNC
SOG
ST_DET2
R+
R-
G-
G+
B+
B-
CLK+
CLK-
RXD
TXD
DDC_CLK
DDC_DAT
VCC3.3
VAA4
VCPU
VAA3
B2
4.SCALER
RIN
GIN
SOG
BIN
GNDR
GNDG
GNDB
HSYNC
VSYNC
R+
R-
G-
G+
B+
B-
CLK+
CLK-
CSZ
SCL
SDA
HWRESET
INT
Volume
AdjBACKLITE
PA[0..9]
PB[0..9]
VCC2.5
VCC3.3
VAA1
VAA2
VAA3
VAA4
AD[0..3]
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AOC LM929
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VCC5V
R205 4.7K 1/16W
VAA2 4
D202
DIODE
VCC5V
VCC3.3
C201
0.1uF
VCC5V
C205
0.1uF
VCC5V+
Q204
PMBS3904
32
1
R208
10K 1/16W
+
C202
220uF/25V
POWER
C
B
26Friday, March 19, 2004
Title
Size Document Number Rev
Date: Sheet of
+
C206
10uF/16V
VCC12V
D201SCHOTTEYDIODE
onPanel_5V/3.3V6 R207 4.7K 1/16W
C
BE
VCPU 6
Q201
PMBS3904
32
1
Brightness
C212
0.1uF
VAA3
VCC5V
C210
0.1uF
VCC5V
Q203
AO3401
onBACKLITE 6
VCC5V 3,4,6
GND
VCC12V 6
VLCD
VCC12V VCC12V
VAA4 4
VCC5V
VAA4
VAA1 4
GND
R210
NC
VLCD 5
TO-263
VCC5V+
C
BE
C203
0.1uF
U201
RT9164-25CG
3 2
1
VI VO
GND
VCC5V+
VCC2.5
R203
1K 1/16W
R212 4.7K 1/16W
C214
0.1uF
VCC3.3
R209
0 1/16W
AdjBACKLITE4
VCC2.5 4
GND
ON_OFF
GND
+
C211
47uF/16V
VCPU
+
C215
47uF/16V
SOT-223
VCC5V
R206
10K 1/16W
R211
10K 1/16W
VAA2
VAA1
R201 4.7K 1/16W
GND
U202
AIC1084-33M
3
1
2
VIN
ADJ
VOUT
R202
10K 1/16W
VCC3.3 4
+
C204
220uF/25V
+
C208
10uF/16V
R204
10K 1/16W
DIM
Q202
PMBS3904
32
1
MST8131A for AOC
C216
0.1uF
FB201
600 OHM
VAA3 4
C207
0.1uF
CN201
CON402(PITCH 2.54)
1
3
5
7
9
11
2
4
6
8
10
12
GND
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