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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