Service Manuals, User Guides, Schematic Diagrams or docs for : AOC LED LE26W154 aoc-le26w154-led

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26 LCD TV                                                                                                                      AOC LE26W154



Service
Service
Service




                                                                                                                            Horizontal Frequency
                                                                                                                                    31~68 KHz

                                                            TABLE OF CONTENTS

 Description                                                         Page         Description                                              Page
Table of Contents............................................................1   6.3 Key Board...................................................22
Important Safety Notice...................................................2      6.4 IR Board.......................................................23
Revision List.........................................................3          7. Adjustment..............................................................24
1. General Specification..................................................4      8. Block Diagram........................................................25
2. Operating Instructions............................................5           9. Schematic Diagram..........................................26
3. Input/Output Specification.........................................6          9.1 Main Board....................................................26
4. Mechanical Instructions...........................................8           9.2 Power Board..................................................46
5. Repair Flow Chart...............................................11            9.3 Key Board.....................................................47
6. PCB Layout........................................................18          9.4 IR Board........................................................48
6.1 Main Board.......................................................18          10. Exploded View..............................................49
6.2 Power Board.....................................................21           11. BOM List......................................................51




                                                                 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
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 might 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 radiations 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.)




                                                            2
                         Revision List

Version   Release Date   Revision Instructions      TPV Model

 A00      Aug.19,2011        Initial release     E26BATNSWBB13N




                               3
1. General Specification
Please refer to user manual.




                               4
2. Operating Instructions
Please refer to user manual.




                               5
3. Input/Output Specification
3.1 RGB Signal Input




                                    15 - Pin Color Display Signal Cable

       Pin No.            Description         Pin No.                     Description

          1      Red Video                        9       No Pin!
          2      Green Video                     10       Sync Ground
          3      Blue Video                      11       RXD
          4      TXD                             12       Serial Data for DDC
          5      Ground                          13       H-Sync.
          6      Red Ground                      14       V-Sync.
          7      Green Ground                    15       Serial Clock for DDC
          8      Blue Ground



3.2 HDMI Digital Connector Pin Assignments




       Pin No.                Description             Pin No.                Description

          1                TMDS Data2+                    2               TMDS Data2 Shield
          3                 TMDS Data2-                   4                 TMDS Data1+
          5            TMDS Data1 Shield                  6                 TMDS Data1-
          7                TMDS Data0+                    8               TMDS Data0 Shield
          9                 TMDS Data0-                   10                TMDS Clock+
         11            TMDS Clock Shield                  12                TMDS Clock-
         13                      CEC                      14                       NC
         15                      SCL                      16                      SDA
         17               DDC/CEC Ground                  18                    +5V Power
         19                Hot Plug Detect




                                                      6
3.3 Compatible Mode Table
RGB Input Signal Timing




HDMI Input Signal Timing




                            7
4. Mechanical Instructions
1. Remove the screws to remove STAND BASE.




2. Remove the screws to remove REAR COVER.




                                             8
3. Disconnect the harness in red.




4. Remove the screws to remove MAIN BOARD and POWER BOARD.




                                              9
5. Remove the screws to remove BKT PANEL and BEZEL.




6. Remove the screws to remove IR BOARD.




                                                 10
5. Repair Flow Chart
1. No power



                   No power (LED "Off")




                                                  No
                  Check the AC input and               Power "On"
                  the power is "ON"?



                       Yes


                                                  No
                       Power board                     Replace the power board
                       output=5.2V?

                       Yes

                Check the IR board and LED



                   Replace the IR board

                        No

                  Replace the main board




                                             11
2. Can't start



                             Can't start



                                                           No
                      Power board output24V?                     Replace the power board



                                      Yes

                                                           Yes

                 Check the power key is under control?             Replace the key board


                                      No

                                                           Yes

                   Check the IR receiver is normal?                Replace the IR board


                                      No

                       Replace the main board

                                       No
                      Replace the Power board




                                                      12
3. Abnormal display



                         Abnormal Display



                                                   No
                         Check the source               Reset the source

                           Yes


                       Enter factory mode to do
                      "EEPROM initial"&"Reset"



                             No

                                                   No
                       Check the main board             Replace the main board


                            Yes
                                                   No
                      Check the LVDS cable              Replace the LVDS cable


                           Yes


                         Check the panel


                            No

                        Replace the panel




                                              13
4. No display



                                      No display (LED blue)




                                                                               No
                               Check TV is under control and power
                                                                                     Replace the main board
                               on/off by remote control and power key?


                                          Yes




                                      Check the backlight is
                                             "On"?

                Yes
                                                                         No




           Check the LVDS cable
                                          No                         Check the B/L
                Yes                                               signal is available?
                                                                                             No
                                 Reinsert or replace the
                                 LVDS cable                         Yes                  Replace main board



          Panel Vcc = 12V?                                      Power board output24V?

                                          No                                                 No

                                                                    Yes              Replace the power board
                Yes
                                  Replace the main board


                                                                   Replace the Panel
           Replace the Panel




                                                     14
5. Sound problem


                          No sound or sound abnormal




                        Check the audio source connection
                         and the TV system are correct?
                                                                            No

                                                            Reinsert the audio cable or
                                          Yes               change the TV system



                        Check the TV is muted, adjust the
                       volume or enter the menu to reset?

                                          No


                         Enter factory mode to do "Reset"


                                           No




                        Check the cable between the
                        speakers and main board is OK?
                                                                             No

                                                                 Replace the cable
                                           Yes




                   Check the speaker resistance value is in spec
                   (Remark: The value is marked on the speaker)?
                                                                               No


                                                                 Replace the main board
                                            Yes



                              Replace the speaker




                                                 15
6. Remote control malfunction


                     Remote Control malfunction




                                                         Yes
                   Check the remote control battery is          Replace the battery
                   not properly placed or no power?



                                        No

                                                         Yes

                    Use the other remote controls              Replace the remote control



                                        No

                                                         Yes
                       Whether the IR board is
                            abnormal?                          Replace the IR board


                                        No


                       Replace the main board




                                                    16
7. OSD is unstable or can't work normally



             OSD is unstable or can't work normally




                                                           No
                Key board connected properly?                   Reconnect the key board


                          Yes


                                                           No
                        Buttons are OK?                         Replace the button function


                          Yes

                                                           No
                       Key board is OK?                         Replace the key board


                          Yes


                Enter factory mode to do "Reset"


                          No

                    Replace the main board




                                                      17
6. PCB Layout
6.1 Main Board
715G4786M0E000005F




                     18
19
20
6.2 Power Board
715G4989P01000002M




                     21
6.3 Key Board
715G4985K01000004S




                     22
6.4 IR Board
715G4045R01001005F




                     23
7. Adjustment
No need to adjust ADC and White Balance.




                                           24
8. Block Diagram
         Nutune    IF                      TS Stream
         FK1604              TC90517FG


                                                                                                         STA339BWTR
                                                                                                          Speaker     SPEAKER
                                                                                                L/R
                                                                                                         Amplifier

                                               HDMI 1
                                               HDMI 2




                                                                        SXL SOC                       Headphone


                              VGA RGB +Audio IN


                             YPbPr +Audio IN

                        CVBS+Audio IN(Share with Y+L/R)


                                                                                                      SPDIF Out




                    Service Only
                                                                                                      LVDS
                           USB                                                                        Interface



                                                                                                      Ethernet




                                                                          4M bit
                                                          64Mx16_DDR3     Serial   NAND Flash
                                                                          Flash    128Mx8 bit


                                                                           25
9. Schematic Diagram
9.1 Main Board
715G4786M0E000005F
                                                                                                                                                                                                             3.3V                                                                                                                                3.3V
                                                                                                                                                                          3.3V                                                                                                                                                                           0.158A
                                                                                                                                                    5V




                                                                                                                                                                                                                                                                                                                                                 2
                                                                                                                                                                                              R736    NC/MAX 0R05 1/16W
                                                                                                                                                                                                                                                                                                                                                      FB729
                                                                                                                                              R702                                                                  R737
                                                                                                                                        4.7K 1/10W                               R703                               NC/4.7K 1/10W                                                                                                                       120R/3000mA                           U703
                                                                                                                                                          NC/4.7K 1/10W          4.7K 1/10W                                                                                                           5V                       TO263                    L0603                                      TO252                                                                                     HP_VDDM
                                                                                                                                                                                                                                                                                                                 U702




                                                                                                                                                                                                                                                                                                                                                                                                                               100N 50V



                                                                                                                                                                                                                                                                                                                                                                                                                                            22UF 6.3V
                                                                                                                                       1K 1/10W            R704                                                                                                                                                                                                                           G1084T43Uf                                                                   FB706




                                                                                                                                                                                                                                                                                                                                                 1
                                                                                                                                          R701                                                                                                                                                                   G1084-33TU3Uf                                                            TO252GOI                             C0603        C0805
                                                                                                                                                                                                                                                                 BL_ON/OFF
                                                                                                                                                                                                                                                                                                               3 TO263GOI      2                                                  3                   2                                                          1        2
                                                                                                                                                                                                                                                                                                                  VIN VOUT                                                                 VIN VOUT




                                                                                                                                                                                                                                                                                                                                                                 C0603 100N 50V




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              10uF 6.3V
                                                                                                                                                                                                                              R739                                                                                                                                                                                                                               120R/3000mA
                                                            FB705     1          2                                                                                                Q706                                        MAX 0R05 1/16W                                                                                                                                                                                                                     L0603




                                                                                                                                                                                                                                                                                                                         GND




                                                                                                                                                                                                                                                                                                                                                                                                   ADJ




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      C706
                                                                             120R/6000mA                                    C701             Q701                              PMBS3904                                                                                                                                            C702      +
                                                                                L0805                                                     PMBS3904                 R738                                                           5V                      3.3V                                                                                                                                                                                                                                            C0603
                                                                                                                                                                                                                                                 R706




                                                                                                                                                                                                                                                                                                                                                         C703




                                                                                                                                                                                                                                                                                                                                                                                                                               C704



                                                                                                                                                                                                                                                                                                                                                                                                                                            C705
                                                                                                                 100N 50V                                          MAX 0R05 1/16W                                                                                                                                              470uF 16V




                                                                                                                                                                                                                                                                                                                      1




                                                                                                                                                                                                                                                                                                                                                                                               1
                                                                                                                                                                                                                       R707                                                                                                                                                                                                                                            FB707                 HP_VCC_15
                                                                                                                                                                                                           NC/4.7K 1/10W                  4.7K 1/10W            R708                                                                                                                                                           R709
                                                                                                                                                                                                                                                              4.7K 1/10W                                                                                                                                                                                         1        2                                   0.771A
                                                                                                                                                                                                        10K 1/10W                             NC/4.7K 1/10W                                                                                                                                                            100R                                      120R/3000mA




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              10uF 6.3V
                                                                                                                                                                                                           R710                                R711                                                C707    +                                                                                                           R0603                                     L0603




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      C708
                                                            FB708     1           2                                                                                                                                                                                                          470uF 16V
                                                                          120R/6000mA
                                                                                 L0805                                                                                                                                                                                          BRT_CTRL                                                                                                                  R713                                                                                        C0603
                       BL_ON/OFF_PRE                                                                                                                                                                        C710                  Q702                                                                                                                                                                    22 OHM +-1% 1/10W
                       BRT_CTRL_PRE                                                                                                                                                                        NC/10uF 6.3V        PMBS3904             R712                                                                                                                                                  R0603
                       12V_PRE                              FB709     1          2                                                                                                                                                                1K 1/10W
                                                                                                                       12V
                                                                             120R/6000mA
                                                                  C713          L0805  C714                     C716
                                                                  100N 50V             100N 50V               + 330UF 35V

                       24V_PRE                                    C0603                      C0603

                       PS_ON_PRE                                                                               10x9mm                                                                                                                                                                                                                                    U704                                                                                           FB711                  HP_VCC_25
                       5VSB_PRE




                                                                                                                                                                                                                                                                                                                                                                                               100N 50V




                                                                                                                                                                                                                                                                                                                                                                                                                       22UF 6.3V
                                                            FB710     1          2                                                                                                                                                                                                                                  5V                            3                                        2 C0603                     C0805               1        2                                    0.21A
                                                                                                                       24V                                                                                                                                                                                                                              VIN      VOUT
                                                                             120R/6000mA                                                                           5VSB                                                                                                                                                                                                                                                                    120R/3000mA
                                                              C719              L0805  C720                     C721                                                                                                                                                                                                                                                                                                                       L0603




                                                                                                                                                                                                                                                                                                                                                                GND
                                                              100N 50V                 100N 50V               + 330UF 35V                                                        R791

                                                              C0603                          C0603




                                                                                                                                                                                                                                                                                                                                                            1




                                                                                                                                                                                                                                                                                                                                                                                               C722




                                                                                                                                                                                                                                                                                                                                                                                                                       C723
                                                                                                                                                                                 4.7K 1/10W
                                                                                                               10x9mm                                       R714
                                                                                                                                                     4.7K 1/10W

                                                                                                                                                                                     R716        NC/4.7K 1/10W
                                                            FB712     1          2                R715
                                                                             120R/6000mA          R0402       33R 1/16W 5%
                                                                                L0805                                                                                            Q703
                                                                                                                                                                                                                                              PS_ON
                                                                                                                                                                                 PMBS3904                                                                                                                                                                                     5VSB                        U705                                                             3VSB
                                                                                                                                                                                     R717                                                                                                                                                                                                                                                                              FB713
                                                                                                                                                                                   4.7K 1/10W                                                                                                                                                                                                          G1084-33TU3Uf
                                                                                                                                                                                                                                                                                                                                                                                                     3 TO263GOI      2                                           1        2
                                                                                                                                                                                                                                                                                                                                                                                                        VIN VOUT
                                                                           FB714                                                                                                                                                                                                                3.3V,                                                                                                                                                            120R/3000mA
                                                                                                                                                                                                                                                                                                                                                                                                                                                                 L0603




                                                                                                                                                                                                                                                                                                                                                                                                                 GND
                                                                                                                                   5VSB                                                                                                                                                                                                                  C724                         +
                                                                      1           2
                                                                           120R/6000mA
                                                                                                                                                                                                                                                                                                3.3VSB,                                            470uF 16V                                                                                                 +    C765
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  470uF 16V
                                                                                                                                                                                                                                                                                                2.5V,




                                                                                                                                                                                                                                                                                                                                                                                                              1
                                                        C726               FB715 L0805                                         C728
                                                        100N 50V                               C727    +           C729        100N 16V

                                                        C0603
                                                                      1          2
                                                                           120R/6000mA
                                                                                             470uF 16V               1N 50V
                                                                                                                               C0402                                                                                                                                                            1.5V                                                    EC080-35 
                                                                                L0805                                C0402                                                                                                                                    CN704
                                                                                                                                                                                                        CN701

                                                                                                                                                                                                                     1        BL_ON/OFF_PRE                           1      5VSB_PRE
                                                                                                                                                                                                                     2        BRT_CTRL_PRE                            2      5VSB_PRE
                                                                                                                                                                                                                     3        12V_PRE                                 3      5VSB_PRE
                                                                                                                                                                                                                     4        12V_PRE                                 4      PS_ON_PRE
                                                                                                                                                                                                                                                                             24V_PRE
                                                                                    Delete AC Detect circuit.                                                                                                        5
                                                                                                                                                                                                                     6
                                                                                                                                                                                                                                                                      5
                                                                                                                                                                                                                                                                      6      24V_PRE
                                                                                                                                                                                                                     7                                                7
                                                                                                                                                                                                                     8         24V_PRE                                8
                                                                                                                                                                                                                     9         24V_PRE                                9
                                                                                                                                                                                                                     10        PS_ON_PRE                              10     12V_PRE
                                                        PS_STANDBY : High to open +24V & +12V                                                                                                                        11        5VSB_PRE                               11     12V_PRE
                                                        INVETER_ON_OFF: follow panel spec                                                                                                                            12        5VSB_PRE                               12     BRT_CTRL_PRE                                                                                                                                                                         AO4449 -7A/-30V
                                                                                                                                                                                                                                                                                                                                                                                               5VSB                                                                                                  5V
                                                        BRIGHT_ADJ: follow panel spec                                                                                                                                13        5VSB_PRE                               13     BL_ON/OFF_PRE                                                                                                                                                                             Q704
                                                                                                                                                                                                                                                                                                                                                                                                                       NC/200K 1/10W
                                                        AC_DET:                                                                                                                                                                                                                                           SYS_PW                                                                                                        R719                                           1                8
                                                                                                                                                                                                                                                                                                                                                                                                                                                                       2   S      D     7
                                                                                                                                                                                                                                                                                                          Norm al: High                                                                                                                                                    S      D
                                                                                                                                                                                                           NC/CONN                                            CONN                                                                                               R718                                                                                                  3                6
                                                                                                                                                                                                                                                                                                          Stand_By:                                         22K 1/10W                                                                     0.47uF 16V                   4   S      D     5
                                                                                                                                                                                                                                                                                                                                                                                                                                            C751                           G      D
                                                                                                                                                                                                                                                                                                          Low
                                                                                                                                                                                                                                                                                                                                                         1K 1/10W
                                                                                                                                                                                                                                                                                                                                                           R721                                                                                                                                           +    C731
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               100UF 16V
                                                                                                                                                                                                                                                                                                SXL_PWRON
                                                                                                                                                                                                                                                                                                                                                                                                           R720 100K 1/10W 5%
                                                                                                                                                                                                                                                                                                                                                                                                                                                                       C732
                                                                                                                                                                                                                                                                                                                   10K 1/10W                                                                              Q705                                                         NC/4.7uF K 25V
                                                                                                                                                                                                                                                                                                                        R722                                                                              PMBS3904



                             R723      0R05 1/10W                                                                                                                                                    FB728 120R/3000mA            HP_VCC1V
                                                                                                                                                                                                             L0603
            AUX_POWER_ON#                                                                                                                                                                                                                                                                                                              GND
                                                                    R724     10K 1/10W                                                                                                                 1                  2

                                                                                           C733
                                       5V                                                                                                             L701                                              FB719 120R/3000mA
                                                                                             NC
                                                FB718 120R/3000mA
                                                                                             C0603            U706 G5684F11U
                                                                                                                                                  2.2uH 20mOHM 8A
                                                                                                                                                    L75X70-SMD
                                                                                                                                                                                                            L0603
                                                                                                                                                                                                                                                                                                  System power
                                                1             2                                           4                  5                                                                         1                  2
                                                      L0603                                               3    IN         LX 6
                                                                                                               EN         LX 7
                                                                                                                                           2




                                                                                                          2
                                                                                                               GND    FREQ 8
                                                                                                                                 



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