AOC L19W461 Schematic
19’’ LCD TV AOC L19W461
1
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
6. PCB Layout ………………..………………....….......25
6.1.Main Board…………..……………...…….…….......25
6.2.Power Board……………..………….……….….......29
6.3. Connector Board………..……………..……….......32
7. White-Balance, Luminance Adjustment...................33
8. Block Diagram.…….................................................35
9. Schematic……………...…………..……..…………...36
9.1 Main Board…….…………..…………………….......36
9.2.Power Board…………….…………...………….......53
10. Exploded View..…………….............................…..55
11. BOM List……………….……………….…………….56
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…….…………………….……….....13
2.4. Front Panel Control Knobs……………….……….....14
3. Input/Output Specification…………....................…....15
4. Mechanical Instructions…………………….................17
5. Repair Flow Chart ……………………….…….…….....20
Service
Service
Service
Horizontal Frequency
31-60 kHz
TABLE OF CONTENTS
Description Page Description Page
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.
19’’ LCD TV AOC L19W461
2
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.)
19’’ LCD TV AOC L19W461
3
Version
Release Date
Revision Instructions
TPV Model
A00
Jan.-27-2007
Initial Release
E196MZNKW1E1NP
Revision List
19’’ LCD TV AOC L19W461
4
1. General Specification
19’’ LCD TV AOC L19W461
5
2. Operating Instructions
2.1 The Use of Remote Control
19’’ LCD TV AOC L19W461
6
2.2 To Use the Menus
19’’ LCD TV AOC L19W461
7
19’’ LCD TV AOC L19W461
8
19’’ LCD TV AOC L19W461
9
19’’ LCD TV AOC L19W461
10
19’’ LCD TV AOC L19W461
11
19’’ LCD TV AOC L19W461
12
19’’ LCD TV AOC L19W461
13
2.3 How to Connect
19’’ LCD TV AOC L19W461
14
2.4 Front Panel Control Knobs
19’’ LCD TV AOC L19W461
15
Pin No.
Description
Pin No.
Description
1
Red Video
9
Mandatory +5V Supply for PC Bypass
2
Green Video
10
Sync Ground
3
Blue Video
11
SDA(Remote Control)
4
SCL(Remote Control)
12
Bi-directional Data (SDA) for PC Bypass
5
Ground
13
H-Sync.
6
Red Video Ground
14
V-Sync.
7
Green Video Ground
15
Data Clock (SCL) for PC Bypass
8
Blue Video Ground
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
1611
15
5
10
3. Input/Output Specification
3.1 RGB Signal input
15 - Pin Color Display Signal Cable
3.2 HDMI Digital connector pin assignments
19’’ LCD TV AOC L19W461
16
VESA MODES
Horizontal
Vertical
Mode
Resolution
Total
Nominal
Frequency
(KHz)
Sync
Polarity
Nominal
Freq.
(Hz)
Sync
Polarit
y
Nominal
Pixel
Clock
(MHz)
VGA
640x480@60Hz
800 x 525
31.469
N
59.940
N
25.175
640x480@72Hz
832 x 520
37.861
N
72.809
N
31.500
640x480@75Hz
840 x 500
37.5
N
75 N 31.500
720x400@70Hz
900 x 449
31.469
N
70.087
P
28.322
SVGA
800x600@56Hz
1024 x 625
35.156
P
56.25
P
36.000
800x600@60Hz
1056 x 628
37.879
P
60.317
P
40.000
800x600@72Hz
1040 x 666
48.097
P
72.188
P
40.000
800x600@75Hz
1056 x 625
46.875
P
75 P 49.5
XGA
1024x768@60Hz
1344x806
48.363
N
60.004
N
65.000
1024x768@70Hz
1328x806
56.476
N
70.069
N
75.000
1024x768@75Hz
1312x800
60.023
P
75.029
P
78.750
WXGA
1360x768@60Hz
1792x795
47.712
P
60.015
P
85.5
1440x900@60Hz
1600x926
55.469
P
59.901
N
88.75
1440x900@60Hz
1904x934
55.935
N
59.887
P
106.5
AV (Composite Video input)
Video1
System
NTSC
Amplitude
1.0 V (p-p), negative sync.
Impedance
75 ohm terminated
S-Video (Y / C input)
S-Video2
System
NTSC
Y signal amplitude
1.0Vpp (including sync)
C signal amplitude
0.286Vpp
Impedance
75 ohm terminated
Component (Y, Pb/Cb, Pr/Cr input)
Video3
System
1080i, 480p, 720p, 480i
Y signal amplitude
1.0Vpp (including sync)
Cr, (R-Y) / Cb, (B-Y)
Signal amplitude
±0.35Vpp, 75 ohm
Impedance
75 ohm terminated
3.3 AV/S-Video/Component Video Inputs
3.4 Compatible Mode Table
19’’ LCD TV AOC L19W461
17
4. Mechanical Instructions
1. Remove the 4 screws to remove the base.
2. Remove the 5 screws and remove the back cover from the right bottom as the arrow show.
3. Remove the 14 screws to remove the shield.
19’’ LCD TV AOC L19W461
18
4. Remove the 9 screws & 5 connectors to remove the main board, power board.
5. Remove the 6 screws to remove the frame.
19’’ LCD TV AOC L19W461
19
6. Remove the 12 screws to remove the bezel.
7. Remove the 4 screws to remove the main frame.
19’’ LCD TV AOC L19W461
NG
Repair the key board
OK
Check 12V_SB
NG
Return to “1”
OK
Check PWR_ON signal
NG
Check U905, Q906, 0907
NG
Replace U905 or Q906 or Q907
Check I2C communication
OK
Check RELAY-SW signal
NG
Replace Q910, Q912
Check U401, U404
NG
Replace U401 or U404
OK
OK
Check main board power supply part
Check key board
OK
Check I2C communication
NG
Check power cord and board interface
Plug in power cord and interface
OK
Check F901, BD901, C904
NG
Replace F901 or BD901 or C904
OK
Check IC901, Q902
Check IC903, IC904
NG
Replace IC901 or Q902
OK
Check T901
OK
Replace T901
Replace IC903 or IC904
OK
NG
NG
Check ZD902
NG
Replace ZD902
5. Repair Flow Chart
1. No Power (No LED indicator)
2. Can not start (LED indicator yellow)
20
19’’ LCD TV AOC L19W461
Check the source
OK
Reset source
NG
Check LVDS cable
NG
Reset LVDS cable
OK
Check 12V power supply
NG
Return to “1”
OK
OK
Check U401
NG
Replace U401
OK
Check panel
NG
Replace panel
Check LIGHT-ON-OUT signal
NG
Replace Q801
OK
Check IC901
NG
Replace IC901
OK
Check Q805, Q806
NG
Replace Q805, Q806
OK
Check PT801, PT802
NG
Replace PT801, PT802
3. No display (LED indicator green)
21
19’’ LCD TV AOC L19W461
Check the source
OK
Reset source
NG
Check signal filter circuit
NG
Replace the filter or inductance
OK
Check U108
NG
Replace U108
TV signal
Check TV system setup
OK
Check TU701
Replace TU701
NTSC, AV,
NG
Component, PC signal
Check U107
NG
Replace U107
HDMI signal
Check U414, U415
NG
Replace U414, U415
OK
Check U401
NG
Replace U401
OK
NG
Replace U701
Check U701
4. Abnormal display
22
19’’ LCD TV AOC L19W461
Check the source
OK
Reset source
NG
Check signal filter circuit
NG
Replace the filter or inductance
OK
NG
SIF signal
Check TV system setup
OK
Check TU701
Replace TU701
AV, Component, PC signal
Check U601, U6A1
NG
Replace U601 or U6A1
Check Earphone jack
NG
Replace the Earphone jack
OK
Check speaker
NG
Replace speaker
OK
NG
Replace U701
Check U701
Check U103
Replace U103
OK
Check U101
Replace U101
Check U401
Replace U401
5. No sound
23
19’’ LCD TV AOC L19W461
OSD is unstable or not working
Is Key Pad Board connecting normally?
Connect Key Pad Board
Is Button Switch normally?
Replace Button Switch
Y
Is Key Pad Board Normally?
Replace Key Pad Board
Check Main Board
N N Y
Y
N
6. Key Board
24
Loading...