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19" LCD Color Monitor Emachine E19T6W
Service
Service
Service
Horizontal Frequency
31-81 kHz
TABLE OF CONTENTS
Description Page Description Page
Table Of Contents..........................................................1 5.2.Electrical Block Diagram.................................17
Revision List.................................................................2 6.Schematic...........................................................19
Important Safety Notice.................................................3 6.1.Main Board.................................................19
1.Monitor Specification...............................................4 6.2. Power Board....................................................24
2.LCD Monitor Description........................................5 7.PCB Layout...........................................................26
3.Operation Instruction...............................................6 7.1.Main Board.......................................................26
3.1.General Instructions.................................................6 7.2.Power Board..........................................29
3.2.Control Button......................................................6 7.3.Key Board..........................................................31
3.3.Adjusting the Picture..........................................7 8.Maintainability........................................................32
4.Input/Output Specification.......................................10 8.1.Equipments and Tools Requirement...................32
4.1.Input Signal Connector........................................10 8.2.Trouble Shooting..........................................33
4.2.Factory Preset Display Modes.........................12 9.White-Balance Luminance adjustment.................39
N
4.3.Panel Specification...............................................13 10.Monitor Exploded View....................................40
5.Block Diagram........................................................15 11.BOM List........................................................41
5.1.Software Flow Chart.........................................15 12. Different Parts List.........................................52
SAFETY NOTICE
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
1
19" LCD Color Monitor Emachine E19T6W
Revision List
Revision Date Revision History TPV Model
A00 Aug.-15-07 First Version Release T97SMKHKGWGYHC
A01 Aug.-29-07 Add TPV Model in item 12 T97SMKHPGWGYHC
2
19" LCD Color Monitor Emachine E19T6W
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.)
3
19" LCD Color Monitor Emachine E19T6W
1. Monitor Specifications
4
19" LCD Color Monitor Emachine E19T6W
2. LCD Monitor Description
The LCD monitor will contain a main board, a power board and two key boards 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
Flat Panel and
CCFL Drive.
CCFL backlight
RS232 Connector
Power Board
Main Board For white balance
(Include: adapter, inverter)
adjustment in factory
mode
Key Board Key Board
AC-IN Video signal, DDC
100V-240V
HOST Computer
5
19" LCD Color Monitor Emachine E19T6W
3. Operating Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The control buttons are located in the right side 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
6
19" LCD Color Monitor Emachine E19T6W
3.3 Adjusting the OSD Menu
Adjusting OSD settings
OSD Menus
7
19" LCD Color Monitor Emachine E19T6W
8
19" LCD Color Monitor Emachine E19T6W
9
19" LCD Color Monitor Emachine E19T6W
4. Input/Output Specification
4.1 Input Signal Connector
1. D-SUB connector
Pin No. Description Pin No. Description
1. Red 9. + 5V
2. Green 10. Sync. GND
3. Blue 11. GND
4. GND 12. DDC-Serial Data
5. Self Test 13. H-Sync
6. R-Return 14. V-Sync
7. G-Return 15. DDC-Serial Clock
8. B-Return
VGA connector layout
1 5
6 10
11 15
10
19" LCD Color Monitor Emachine E19T6W
2. DVI-D connector
Pin No. Description Pin No. Description
1. TMDS data 2 15. GND
2. TMDS data 2 16. Hot Plug Detect
3. TMDS data 2/4 Shield 17. TMDS data 0
4. NA 18. TMDS data 0
5. NA 19. TMDS data 0/5 Shield
6. DDC Clock 20. NA
7. DDC Data 21. NA
8. Analog Vertical Sync 22. TMDS Clock Shield
9. TMDS data 1 23. TMDS Clock +
10. TMDS data 1 24. TMDS Clock
11. TMDS data 1/3 Shield C1 Analog red
12. NA C2 Analog Horizontal Sync
13. NA C3 Analog blue
14. 5V Power C4 Analog Horizontal Sync
24 - Pin Color Display Signal Cable
1 2 3 4 5 6 7 8 C1 C2
9 10 11 12 13 14 15 16
C3 C4
17 18 19 20 21 22 23 24
11
19" LCD Color Monitor Emachine E19T6W
4.2. Factory Preset Display Modes
12
19" LCD Color Monitor Emachine E19T6W
4.3 Panel Specification
4.3.1 Features
4.3.2 Display Characteristics
4.3.3 Optical Characteristics
13
19" LCD Color Monitor Emachine E19T6W
14
19" LCD Color Monitor Emachine E19T6W
5. Block Diagram
5.1 Software Flow Chat
1
Y
2 3
N
4
N
5
Y
6
N
7 8
Y
9
N
10 11
Y
N N
12 13
Y Y
N
14 15 16
Y
17
N
18 19
Y
15
19" LCD Color Monitor Emachine E19T6W
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?
16
19" LCD Color Monitor Emachine E19T6W
5.2 Electrical Block Diagram
5.2.1 Main Board
Panel Interface
(CN101)
Scalar TSUM56AWHK Key Control
Flash Memory (Include MCU, ADC, OSD) Interface
SST25LF020A (U401) (CN403)
(U402)
SDA
SCL
H sync D-Data
Crystal V sync D-Clock
EEPROM
14.318MHZ RGB
M24C16
(X401)
(U403)
D-Sub DVI
Connector Connector
(CN405) (CN406)
VGA_SDA, DVI_SDA,
VGA_SCL DVI_SCL
EEPROM EEPROM
M24C02 M24C02
(U404) (U405)
17
19" LCD Color Monitor Emachine E19T6W
5.2.2 Inverter/Power Board
18
19" LCD Color Monitor Emachine E19T6W
6. Schematic
6.1 Main Board
715G2188-1
B3
TSUM56AWHK-1 XGA/SXGA
B4
SCHEMATIC
LVDS OUTPUT
RIN RIN
GNDR GNDR
GIN GIN
GNDG GNDG
SOG SOG
BIN BIN
GNDB GNDB
+5VA +5V HSY NC HSY NC VCC1.8 VCC3.3 +5V
VSY NC VSY NC
DDCA_SDA DDCA_SDA
DDCA_SCL DDCA_SCL
+5V DET_VGA DET_VGA
DDC_WP DDC_WP VCC1.8
+5VA R+ R+
R- R- Vcc3.3
G+ G+
G- G- +5V
B+ B+
B- B-
CLK+ CLK+
CLK- CLK-
DDCD_SDA DDCD_SDA
DDCD_SCL DDCD_SCL
DET_DVI DET_DVI
HPD_CTRL HPD_CTRL
3.INPUT
B5
PA[0..9]
PA[0..9] PA[0..9]
PB[0..9]
PB[0..9] PB[0..9]
VLCD
VLCD
B2
on_BACKLIGHT on_BACKLIGHT
on_Panel on_Panel
VCC3.3 +5VA +5V VCC1.8
VCTRL VCTRL 5.PANEL INTERFACE
VCC1.8
+5V Adj_BACKLIGHT Adj_BACKLIGHT
+5VA
VCC3.3 VLCD
Title
VLCD 4.SCALER Top
Size Document Number Rev
2.POWER B G2188-1-X-X-2-061215 1
Date: Friday , December 15, 2006 Sheet 2 of 6
19
19" LCD Color Monitor Emachine E19T6W
+5V
U701
SOT-223
NC/LT1117-18
+3V3 H1 H2 H3
VCTRL 4
R702
3 2
VI VO
8
7
6
8
7
6
8
7
6
51 1/10W
4 9 5 9 5 9 5
GN D
VO
8
7
6
8
7
6
8
7
6
C701 C703 + C704 9 5 4 9 5 4 9 5 4
4 4 4 VCC1.8
1
2
3
1
2
3
1
2
3
NC/0.1uF NC/100uF/16V NC/0.1uF TP TP TP + C702
1
1
2
3
1
2
3
1
2
3
VCC1.8 4
4.7uF/16V
D701
BL_ADJ(DC) R31 C51 R32 R29 R33 Q4 FTD7 FTD8 FTD9
0V ~ 3.3V 4.7K 1UF 0 X X X FD Mark FD Mark FD Mark LL4148
0V ~ 5V 4.7K 1UF X 1K 4.7K MMBT3904 Q702 R703
PZT2907A
BL_ADJ R31 C32 2K 1/10W
P W M 47 N.C D702
D C 4K7 1uF
LL4148
+5V
R704
+12V R701
100 1/10W VCC3.3
1K 1/10W
CN701
C706
VCC3.3 4
C707 GND 1 2 BL_ON R705 0 1/10W R706 0 1/10W
NC NC GND 3 4 BL_ADJ
+5V +5V
3
+12V 5 6 +12V C708
+5V GND 7 8 GND 1 R707
Q701 NC
Adj_BACKLIGHT 4
+5V 9 10 +5V NC NC
3,4 +5V R708 R728
GND 11 12 GND
+5V
2
1K 1/10W 10K 1/10W
C709 + C710 CONN R710 NC R711
100uF/25V D703(BAT54) Vf=0.53V (worst cauae) when
0.1uF C711 30K 1/10W
+5V If=100mA. So when system power off, the
NC Q703
system loading is about 32mA, it is
3,4 +5V safe.
PMBS3904
Q707 R712 4.7K 1/10W D704
PMBS3904
on_BACKLIGHT 4 TO-263
SR24
R729 VCC3.3
U702 AIC1084-33PM
+ C719 +5VA
47uF/16V 10K 1/10W +5VA 3 2
3,4 +5VA VI VO VCC3.3 4
GN D
D704(SSM12L) Vf=0.38V and If=1A. C712
C713 + C714
So when system power on, the
0.1uF 100uF/16V 0.1uF
system loading is about 400mA
1
(3.3V is about 200mA and 1.8V is
about 200mA), So D35 changed
from 1N4148(or BAT42) to
SSM12L(schottky diode).
+3V3 +5V +3V3
P.S: The 1N4148 Vf=0.7V~1V can't meet
VLCD
LDO spec. The BAT42, Vf is OK but the
VLCD 5
+5V +3V3
If=200mA(forward current) can not
R714 R715 meet current spec.
R716 R717
10K 1/10W
NC
10K 1/10W R721 R722
NC Q704
R723 51K 1/10W AO3401 0 1/10W NC
R725 4.7K 1/10W C715 C705
Q706
4 on_Panel 0.1uF/NC 1uF/16V
PMBS3904
C718 + C717 R727
10uF/16V
0.1uF 10K 1/10W Title
POWER
Size Document Number Rev
07/21 B G2188-1-X-X-2-061215
Q706 3904->3906 for pluse add c705 for inrush current
1
Date: Friday , December 15, 2006 Sheet 3 of 6
20
19" LCD Color Monitor Emachine E19T6W
CN405
17
RED+ FB410 0 1/10W
11 1 R434 56 1/10W C432 0.047uF
RIN 4
6 RED-
GREEN+ FB411 0 1/10W
12 2 R435 56 1/10W C433 0.047uF
GIN 4
7 GREEN-
FB412 0 1/10W
13 3 BLUE+ R436 56 1/10W C434 0.047uF
BIN 4
8 BLUE-
14 4 PC5V R437 470 1/10W C435 0.047uF
SOG 4
9 PC5V R438 R439 R440
15 5 VGA_CON
10 75 1/10W 75 1/10W 75 1/10W
DB15 R441 100 1/10W C436 0.047uF
GNDR 4
16
R442 100 1/10W C437 0.047uF
GNDG 4
R443 100 1/10W C438 0.047uF
GNDB 4
3
3
3
D403 D404 D405 +5V
BAV99 BAV99 BAV99
D406
+5V 2,4
ESD_5V
MLL5232B 5.6V R444 +5VA PC5V
C439 0.1uF C440 0.1uF C441 0.1uF
3,4 +5VA
10K 1/10W
2
1
2
1
2
1
R445 100 1/10W
DET_VGA 4
2
1
HSI FB409 120 OHM R446 1K 1/10W
HSY NC 4
D407
VSI R447 1K 1/10W D-BAV70-7-F
VSY NC 4
BAT54C->BAV70 07/21
3
D408 D409 D410
R448 C442 R449 C443
MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V
2.2K 1/10W 33pF 2.2K 1/10W 220pF R450 R451 R452 C444
U404
10K 1/10W 10K 1/10W 8 1 0.1uF