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Emachine+E19T6W


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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
                                                                                      



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