AOC LE19K097, LE22K097, LE24K097 Schematic
19″_22″_24″LCD TV AOC LE19_22_24K097
Service
Service
Service
LLEE1199KK009977
LLEE2222KK009977
LLEE2244KK009977
TABLE OF CONTENTS
Description Page Description Page
Table of Contents........……...................................…........1
Important Safety Notice.......................................……......2
Revision List…………………………………………………3
1. General Specification..............................……...…........4
2. Operating Instructions………………...…….……….......5
2.1 The Use of Remote Control…….…..……….…….......5
2.2 To Use the Menu….....…………………….……….......6
2.3 How to Connect……..……………….…….……….....12
2.4 Front Panel Control Knobs…….………….……….....13
3. Input/Output Specification…………....................…....14
4. Mechanical Instructions…………………….................16
5. Repair Flow Chart ……………………….…….…….....20
6. PCB Layout ………………..…………………....….......25
6.1 Main Board…………..………………...…….…….......25
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVI CE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
6.2 Power Board……..……………….…….……….......27
6.3Led Board…..……………….…….……….......31
6.4 Key Board………………………..……..……….......32
6.5 IR Board………………………….……..……….......33
7. Adjustment……..………………………….................34
8. Block Diagram.……........................................ .........36
9. Schematic Diagram…..…………....………………...37
9.1 Main Board…………………………………...….......37
9.2 Power Board…..………….….……...………….......50
9.3 Inverter Board.…...……….….……...………….......52
9.4 Key Board……………….……….…………….........53
9.5 IR Board……...………….……….…………….........54
10. Exploded View………………………………….…...55
11. BOM List……………….………………….………….58
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 desig ned 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 hi s 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 modi fied or altered witho ut written permissi on 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:
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 ba cklight 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 ground ed 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. (Cle aning with a dirty or rough cloth
may
damage the panel.)
2
Revision List
Version Release Date Revision Instructions TPV Model
A00 Apr.31,2010 Initial Release E19AM2NBWEG1NS
A00 Apr.31,2010 Initial Release E22AM2NBWEG1NS
A00 Apr.31,2010 Initial Release E24AM2NBWEG1NS
3
1. General Specification
4
2. Operating Instructions
2.1 The Use of Remote Control
5
2.2 To Use the Menus
6
7
8
9
10
11
2.3 How to Connect
12
2.4 Front Panel Control Knobs
13
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 Clock13 CEC 14 Reserved (N.C. on Device)
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect
14
3.3 AV/S-Video/Component Video Inputs
AV (Composite Video Input)
Video1
Amplitude 1Vpp (300mV-sync, 700mV-video)
Impedance 75 ohm terminated
S-Video (Y / C Input)
S-Video2
System PAL/ SECAM
Y signal amplitude 1VppY-signal
C signal amplitude +/-700mV C-signal
Impedance 75 ohm terminated
Component (Y, Pb/Cb, Pr/Cr Input)
Video3
System PAL, SECAM and DVB-T
15
4. Mechanical Instructions
1. Unplug the base
.
2. Remove 11 screws to remove the rear cover.
3. Remove5screws and unplug 4 connectors to remove the main board.
16
4. Remove 4 screws and unplug 4 connectors to remove the power board.
17
5. Remove 7 screws to remove the bracket.
6. Unplug two speakers.
7.Remove the 1 connect to remove the IR board.
8.Remove the 1 screw and 1 connect to remove the LED board.
18
9. Remove the front bezel.
10. Unplug Key Board.
11.The panel
19
5. Repair Flow Chart
No Picture (LED Orange)
Check main board standby power supply Change U751
Check key board/IR board
Check 43V power supply
No picture
OK
OK
OK
OK
Check U401
OK
Check I2C bus
NG
NG
NG
NG
NG
Change key board/IR board
Check the power supply circuit
Change U401
Check I2C communication
20
Abnormal Display
No Sound
Check the source
Check signal filter circuit
Check LVDS cable
OK
OK
Check input
OK
OK
Check panel
NG
NG
NG OK
NG
Reset source
Replace the filter or resistance
RF signal
Replace LVDS cable
Replace panel
Check TV system setup
OK
Check Tuner
OK
Replace Tuner
Check the source
OK
Check if mute
OK
Check input signal
OK
Check U401
OK
Check U601
OK
Check speaker
NG
OK
NG
NG
NG
NG
Check U601
Reset source
TV SIF
OK
Change U401
Change U601
Change speaker
NG
NG
Check TV
system
Change U601
NG
Reset TV system
21
No Power (No LED Indicator)
For 19
Check power cord and board interface
OK
NG
Plug in power cord and interface
Check F901, BD901
OK
Check IC901
OK
NG
Check T901
OK
Check Q901 Q920 D901
D915 D910 D908 D913 D923
For 22
Check power cord and board interface
NG
NG
NG
Replace F901, BD901
Replace IC901
Replace T901
Replace Q901 Q920 D901
D915 D910 D908 D913 D923
NG
Plug in power cord and interface
OK
Check F901, BD901
OK
Check IC901
OK
Check T901
OK
Check Q901 Q920 D901
D908 D913
NG
NG
NG
NG
Replace F901, BD901
Replace IC901
Replace T901
Replace Q901 Q920 D901
D908 D913
22
For 24
Check power cord and board interface
OK
NG
Plug in power cord and interface
Check F901, BD901
OK
Check IC901
OK
Check T901
OK
Check Q901 Q920 D901
D908 D913
NG
NG
NG
No Display (LED Indicator Green)
Check the source
OK
Check LVDS cable
OK
Check Q750, Q7501
OK
Check Q401, Q402
OK
Check U401
OK
Check panel
NG
Replace IC901
Replace T901
Replace Q901 Q920 D901
D908 D913
NG
NG
NG
NG
NG
NG
Replace F901, BD901
Reset source
Reset LVDS cable
Replace Q750, Q7501
Replace Q401, Q402
Replace main board
Replace panel
23
Key Board
OSD is unstable or not working
Is Key Pad Board connecting normally?
Y
Is Button Switch normally?
Y
Is Key Pad Board Normally?
Y
Check Main Board
N
Connect Key Pad Board
N
N
Replace Button Switch
Replace Key Pad Board
24
6. PCB Layout
6.1Main Board
715G4035M1A000005B
25
26
6.2 Power Board
715G3762P01W30002U（for 19”）
27
28
715G3895P0AH20002U (for 22”_24”)
29
30
Loading...