32″LCD TV |
AOC L32W831 |
Service
Service
Service
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Horizontal Frequency |
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31~60 kHz |
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TABLE OF CONTENTS |
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Description |
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Description |
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Table Of Contents.......……..............................…........1 |
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6.1.Main Board…………..……………...……….......22 |
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Important Safety Notice.......................................……......2 |
6.2.Power Board……………..………….……….......25 |
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Revision List…………………………………………………3 |
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6.3.Key Board………………………..……….......26 |
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1. |
General Specification..............................………........4 |
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6.4.IR Board………………………..……….......26 |
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Operating Instructions…………………….……….......5 |
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7. White-Balance, Luminance Adjustment...................27 |
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2.1. The Use Of Remote Control…….………….…….......5 |
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8. Block Diagram.……...........................................28 |
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2.2. To Use The Menu…...…………………….……….......6 |
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9. Schematic……………...…………..………………...29 |
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2.3. How To Connect…….…………………….……….....9 |
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9.1 Main Board…………………………………...….......29 |
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2.4. Front Panel Control Knobs……………….……….....10 |
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9.2.Power Board…………….…………...………….......39 |
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3. |
Input/Output Specification…………....................…....11 |
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9.3.Key Board……………….……….………….......40 |
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4. Mechanical Instructions…………………….................13 |
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10. Exploded View………………………………….…...41 |
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5. Repair Flow Chart ……………………….…….…….....17 |
11. BOM List……………….…………………………….42 |
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6. |
PCB Layout ………………..………………....….......22 |
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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
32″LCD TV |
AOC L32W831 |
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
32″LCD TV |
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AOC L32W831 |
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Revision List |
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Version |
Release Date |
Revision Instructions |
TPV Model |
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A00 |
Jul.-4-2008 |
Initial Release |
E328MNNSW8AENN |
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3
32″LCD TV |
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AOC L32W831 |
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1. General Specification |
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Items |
Specification |
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Panel Type |
V315B1-L01 C2 NB CMO |
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Driving system |
TFT-LCD CMO Panel |
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Active Area ratio |
16:9 |
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Resolutions |
1366 x768 |
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LCD Panel |
Brightness |
500 cd/ |
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Contrast |
1500:1 |
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Pixel Pitch |
0.51075 mm (H) X 0.51075 mm(V) |
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Display colors |
16.7 million |
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Color Temperature |
Cool / Warm/normal |
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TV Standard |
PAL M/N, NTSC |
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TV Function |
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Color systems |
PAL M/N, NTSC |
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Closed Caption / V-chip For USA |
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AVx2 |
RCA x 2 |
Audio L/R x 2 |
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Video Inputs |
S-Video |
S-Video x 2 |
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COMPONENT |
Y,Cb,Cr x 1 |
Audio channel L / Rx 1 |
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HDMIx2 |
720p,1080i,480p,480i |
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Speaker (built-in): Two 5W speakers |
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Audio Output |
Audio Output: L / R |
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Headphone Mini-jack for stereo (3.5ø) |
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SPDIF |
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OSD language |
English, etc |
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Wall Mount |
VESA 200 mm x 200 mm |
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Power |
Power Supply |
AC100V~240V, 50/60Hz |
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Power Consumption |
< 200W |
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Operating |
0 °C ~ 40 °C |
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Environment |
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Storage |
-10 °C ~ 50 °C |
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Operating |
10% ~ 85% |
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4
32″LCD TV |
AOC L32W831 |
2. Operating Instructions
2.1 The Use of Remote Control
5
32″LCD TV |
AOC L32W831 |
2.2 To Use the Menus
1.Press the MENU button to display the main menu
2.Use the cursor up/down to select a menu item.
3.Use the cursor left/right to enter a submenu.
4.Press the ENTER button to enable/disable the function.
5.Press the MENU or EXIT button to exit the menu.
Press the MENU button to enter the main OSD (On Screen Display). Adjust the items including Setup menu, Video menu, Audio menu and Feature menu. However, some function items in the menus may only be enabled in the particular source modes
SETUP MENU
The Setup menu in TV mode shows as below. In others source modes, the Setup menu only shows Menu Language and Aspect Ratio items.
1.PROGRAM NO: Show the TV channel label menu for user modifying channel labels specifically.
2.AIR/ CABLE: Select TV source signal from the Air (antenna) or Cable (CATV).
3.AUTO SEARCH: Automatically scan all NTSC TV channels and then store in the channel table. In channel scan process, the OSD can display the number of channels which had been found.
4.SKIP: you can select the ship ON/OFF,so that the program no channel can be delete or added.
VIDEO MENU
The Video menu in most source modes shows as below. It provides several video adjustment items for user fine tuning the video display. Only in VGA source modes, the Video menu simply provides Contrast, Brightness, Back light and Settings (Preset) items.
6
32″LCD TV |
AOC L32W831 |
If you selected PERSONAL, press or to highlight an option, then press or to adjust the option. You can adjust:
1.CONTRAST: Video contrast adjustment, the tuning range is 0 ~ 100.
2.BRIGHTNESS: Video brightness adjustment, the tuning range is 0 ~ 100.
3.SATURATION: COLOR saturation adjust, the tuning range is 0 ~ 100
4.TINT: Video tint adjustment, the tuning range is R50 ~ G50.
5.SHARPNESS: Video sharpness adjustment, the tuning range is 0~10
6.BACKLIGHT: Backlight strength adjustment, the tuning range is 0 ~ 10.
7.EDGE ENHANCE: Press < or > to select HIGH, OFF, or LOW.
8.NOISE REDUCTION: Press < or > to select HIGH .OFF, LOW or MID.
9.COLOR TEMPERATURE: Press < or > to select COOL, STANDARD, or WARM.
AUDIO MENU
The Audio menu in TV mode shows as below. It provides audio adjustment for user to modify the audio setting. Audio language setting is only available with ATSC TV source, the option is disable under other source modes.
Press or to highlight AUDIO, then press > The AUDIO menu opens.
Press or to highlight PRESET, then press < or > to select an audio mode. You can select:
•VOICE
•MUSIC
•THEATER
•PERSONAL
If you selected PERSONAL, press or to highlight an option, then press or to adjust the option. You can adjust:
•BALANCE—Adjust the balance between the right and left audio channels.
•BASS—Adjust the low sounds.
•TREBLE—Adjust the high sounds.
FEATURE MENU
The Feature menu in AV/S-video mode shows as below. It provides certain optional control functions such as image size, sleep timer, blue screen on/off, transparent, closed caption, color system. This menu gives users the most flexibilities to satisfy their generally demands. According to the various requirements in different source modes, certain features should be hidden (disable) on the menu. The details footnotes will be described clearly below.
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32″LCD TV |
AOC L32W831 |
1. LANGUAGE: you can select the ENGLISH SPANISH Portuguese French
2.IMAGE SIZE : you can select WIDE, ZOOM, CINEMA, NORMAL
3.SLEEP TIMER: Enable or disable the TV standby timer. User can set the TV standby timer as off / 5 min / 10 min / 15 min/ 30 min / 45 min / 60 min/ 90 min / 120 min / 180min/ 240min. Timer starts to count down after cursor
leaving the sub-menu. (At the moment, the item shows ** min Left and the cursor highlights on the Feature
icon.)
4.BLUE SCREEN: you can select blue screen ON/OFF
5.TRANSPARENT: you can select from 0 to 7
6.CLOSED CAPTION Press or to highlight CLOSED CAPTION, then press or to select the closed captioning mode. You can select CC1.CC2, CC3, CC4, TT1, TT2, TT3 or TT4.
7.COLOR SYSTEM: this function you select color system.default is auto you can choose NTSC, PAL M, PAL N.
8.RESET: you can use it reset all setting to default.
VGA SETTING MENU
VGA Set: This option only shows and is available in VGA mode, which provides several items for the VGA display fine tuning, such as : H-Position V-Position Clock and Phase . All these items giving the tuning range
from 0 to 100. Setting item provides the default VGA setting values restoring.
8
32″LCD TV |
AOC L32W831 |
2.3 How to Connect
1.HDMI – Connect the primary source for digital video such as a DVD multimedia player or set top box through this all digital connector. The white color band on the rear of the TV indicates this connection.
2.VGA AUDIO– Connect the audio for a computer to this jack.
3.HEADPHONE – Connect headphone to this jack.
4.COMPONENT (YPb/CbPr/Cr with Audio L/R) – Connect the primary source for component video devices such as a DVD Player or set top box here. From left to right, use red for Pr, blue for Pb, green for Y, red for right audio (R) and white for left audio (L) inputs.
5.AV OUT– Connect a VCR for recording to these jacks
6.S-VIDEO1 – Connect an S-Video device to this jack.
7.RGB PC – Connect the video and audio cables from a computer here.
8.AV1 IN – Connect the primary source for composite video devices, such as a VCR or video game.
9.Use the white and red connectors to connect the external audio from the same source. The signal being carried by the S-Video cable and connector, if connected, will take priority over the Video RCA connector (yellow connector).
10.S-VIDEO2 – Connect an S-Video device to this jack.
11.Use the white and red connectors to connect the external audio from the same source. The signal being carried by the S-Video cable and connector, if connected, will take priority over the Video RCA connector (yellow connector)
12.AV2 IN – Connect the primary source for composite video devices, such as a VCR or video game.
Once your equipment is connected, use the following procedure to view the input signal:
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32″LCD TV |
AOC L32W831 |
Press the source button on the remote controller to select the relevant source to view. (ex: Press VIDEO button to select “Composite Rear” if you have connected a video recorder to Composite Rear socket.)
2.4 Front Panel Control Knobs
1 VOL▲ |
VOL +: Press to increase the sound volume level. |
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2 VOL▼ |
VOL - : Press to decrease the sound volume level. |
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3 CH ▲ |
CH +: Press to select the next higher Program |
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4 CH ▼ |
CH - : Press to select the next lower Program |
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5 MENU |
Menu key: Press to open or exit the OSD menu. |
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6 INPUT |
Source key: Press to select the input source. |
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Power key: Press to turn on / off (standby) the TV |
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set. |
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(Please re-turn on TV after the Power-ON status |
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LED had changed to the Red color and finished |
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flashing.) |
10
32″LCD TV |
AOC L32W831 |
3. Input/Output Specification
3.1 RGB Signal input
15 - Pin Color Display Signal Cable
Pin No. |
Description |
Pin No. |
Description |
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1 |
Red Video |
9 |
No Pin |
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2 |
Green Video |
10 |
Sync Ground |
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3 |
Blue Video |
11 |
SDA(Remote Control) |
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4 |
SCL(Remote Control) |
12 |
Serial Data for DDC |
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5 |
Ground |
13 |
H-Sync. |
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6 |
Red Ground |
14 |
V-Sync. |
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7 |
Green Ground |
15 |
Serial Clock for DDC |
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8 |
Blue Ground |
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3.2 HDMI Digital connector pin assignments
Pin No. |
Description |
Pin No. |
Description |
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1 |
TMDS Data2+ |
2 |
TMDS Data2 Shield |
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3 |
TMDS Data2- |
4 |
TMDS Data1+ |
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5 |
TMDS Data1 Shield |
6 |
TMDS Data1- |
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7 |
TMDS Data0+ |
8 |
TMDS Data0 Shield |
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9 |
TMDS Data0- |
10 |
TMDS Clock+ |
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11 |
TMDS Clock Shield |
12 |
TMDS Clock- |
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13 |
CEC |
14 |
NC |
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15 |
SCL |
16 |
SDA |
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17 |
DDC/CEC Ground |
18 |
+5V Power |
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19 |
Hot Plug Detect |
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11
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32″LCD TV |
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AOC L32W831 |
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3.3 AV/S-Video/Component Video Inputs |
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AV (Composite Video input) |
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Video1/2 |
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System |
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NTSC / PAL-M / PAL-N |
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Amplitude |
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1.0 V (p-p), negative sync. |
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Impedance |
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75 ohm terminated |
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S-Video (Y / C input) |
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S-Video1/2 |
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System |
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NTSC / PAL-M / PAL-N |
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Y signal amplitude |
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1.0Vpp |
(including sync) |
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C signal amplitude |
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0.286Vpp |
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Impedance |
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75 ohm terminated |
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Component (Y, Pb/Cb, Pr/Cr input) |
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Video1 |
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System |
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1080i, 480p, 720p, 480i |
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Y signal amplitude |
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1.0Vpp |
(including sync) |
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Cr, (R-Y) / Cb, (B-Y) |
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±0.35Vpp, 75 ohm |
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Signal amplitude |
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Impedance |
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75 ohm terminated |
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3.4 Compatible Mode Table |
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VESA MODES |
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Horizontal |
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Vertical |
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Nominal |
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|
Nominal |
|
|
Nominal |
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||
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|
|
Sync |
|
Sync |
|
Pixel |
|
||||
|
Mode |
Resolution |
|
|
Total |
|
Frequency |
|
|
Freq. |
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|||||
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|
Polarity |
|
|
Polarity |
|
Clock |
|
||||||||
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(KHz) |
|
(Hz) |
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|||||
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(MHz) |
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|||
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||
|
|
|
640x480@60Hz |
|
|
800 x 525 |
|
31.469 |
|
N |
|
59.940 |
N |
|
25.175 |
|
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|
|
|
|
VGA |
640x480@72Hz |
|
|
832 x 520 |
|
37.861 |
|
N |
|
72.809 |
N |
|
31.500 |
|
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||
|
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||
|
640x480@75Hz |
|
|
840 x 500 |
|
37.5 |
|
N |
|
75 |
|
N |
|
31.500 |
|
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||
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|||||||
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720x400@70Hz |
|
|
900 x 449 |
|
31.469 |
|
N |
|
70.087 |
P |
|
28.322 |
|
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800x600@56Hz |
|
|
1024 x 625 |
|
35.156 |
|
P |
|
56.25 |
|
P |
|
36.000 |
|
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|
|
|
|
|
|
|
SVGA |
800x600@60Hz |
|
|
1056 x 628 |
|
37.879 |
|
P |
|
60.317 |
P |
|
40.000 |
|
|
|||
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|
|||
800x600@72Hz |
|
|
1040 x 666 |
|
48.097 |
|
P |
|
72.188 |
P |
|
40.000 |
|
|
||||
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||||||||
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|
|
|
|
|
|
800x600@75Hz |
|
|
1056 x 625 |
|
46.875 |
|
P |
|
75 |
|
P |
|
49.5 |
|
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|
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|
|
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|
|
1024x768@60Hz |
|
|
1344x806 |
|
48.363 |
|
N |
|
60.004 |
N |
|
65.000 |
|
|
|
|
XGA |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
1024x768@70Hz |
|
|
1328x806 |
|
56.476 |
|
N |
|
70.069 |
N |
|
75.000 |
|
|
|||
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|
|
1024x768@75Hz |
|
|
1312x800 |
|
60.023 |
|
P |
|
75.029 |
P |
|
78.750 |
|
|
|
|
|
|
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|
|
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|
|
||
WXGA |
1360x768@60Hz |
|
|
1792X795 |
|
47,712 |
|
P |
|
60.015 |
P |
|
85.5 |
|
|
|||
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|
|
12
32″LCD TV |
AOC L32W831 |
4. Mechanical Instructions
1. Remove the 4 screws to remove the base.
2. Remove 9 screws to remove the rear cover.
3. Release the connectors
13
32″LCD TV |
AOC L32W831 |
4. Remove 2 screws to remove the bkt-vesa-top.
5.Remove 2 screws to remove the speakers
6. Remove the main board, power board.
14
32″LCD TV |
AOC L32W831 |
7. Remove the bkt-base-support..
7. Release the key board and IR board.
8. Remove the bkt-pcb-holder.
15
32″LCD TV |
AOC L32W831 |
9. Remove the bkt-panel-support.
10. Remove the bezel.
16
32″LCD TV |
AOC L32W831 |
5. Repair Flow Chart
1. No Power (No LED indicator)
Check power cord and board interface
OK
|
NG |
|
Check F901, BD901 |
||
|
||
|
|
OK |
|
|
|
NG |
|
Check D902, C920 |
||
|
||
|
|
|
OK |
|
NG |
Plug in power cord and interface |
|
Replace F901 or BD901
Replace D902 or C920
|
|
NG |
|
|
|
|
|
Check T901 |
|
Replace T901 |
|
||
|
|
|
|
|||
|
|
|
|
|
|
|
|
OK |
|
|
|
|
|
|
|
|
|
NG |
|
|
Check D937, C952, C953,D932 |
|
Replace D937 or C952 or C953 or D932 |
||||
|
|
|
|
|
|
|
2. Can not start (No LED indicator)
|
|
Can not start |
|
|
|
|
|
|
|
|
|
|
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
|
Check key board or remote control |
|
Repair key board or remote control |
||||||||||
|
|
|
||||||||||
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
Check power supply for main board |
|
|
Replace the failure component |
|
||||||||
|
|
|
|
|||||||||
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
|
|
|
|
|
|
|
Check U403 |
|
Replace U403 |
||||||||
|
|
|
|
|
OK
Check I2C communication
17
32″LCD TV |
AOC L32W831 |
3. No display (LED indicator Green )
|
|
|
|
|
|
|
NG |
|
|
|
|
|
|
|
|
NG |
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
Check 12V |
|
|
Check PS |
|||||||||
|
Check back light is OK |
|
|
|
|
|
||||||||||||||||
|
|
|
|
|
|
|
|
|
power supply |
|
|
|
|
signal |
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
||||||
|
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|
|
|
|
|
|
|
|
|
|
|
|
OK |
|
|
|
|
|
|
|
|
OK |
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
Check LVDS cable |
|
|
|
|
|
|
|
Check BL-ON/OFF signal |
|
|
|
|
|||||||
|
|
|
and connector |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
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|
|
|
|
|
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
NG |
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
Replace U403 |
|
|
|
|
|
|
|
|
NG |
||||||
|
|
|
Check U403 |
|
|
|
|
|
|
Check Q705 Q704 |
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
Check U401 |
|
|
Replace U401 |
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Check Panel |
|
Replace Panel |
|
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
18
OK |
|
|
Check power |
||
|
||
|
board |
|
|
|
Replace Q705 Q704
|
32″LCD TV |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
AOC L32W831 |
|
||||
4. Abnormal display |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
Check the source |
|
NG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
Reset source |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||||
|
|
|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
NG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Check signal filter circuit |
|
|
|
|
Replace the filter or inductance |
|
|
|
|
|
|
|
|
|
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|||||||||||||
|
|
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|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
TV signal |
|
|
|
|
Check TV system setup |
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
OK |
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
|
|||
|
|
|
OK |
|
|
|
|
|
|
|
|
|
|
|
|
|
Check TU701 |
|
|
|
Replace TU701 |
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
|||||||
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
Replace the failure |
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Check the circuit from |
|
|
|
|
||||||||||
|
|
|
|
|
|
|
|
AV/SV signal |
|
|
|
|
|
|
||||||||||||||||
|
|
|
|
|
|
|
|
|
connector to U401 |
|
|
|
|
|
|
component |
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Check the circuit from |
|
|
|
|
Replace the failure |
|
||||||||
|
|
|
|
|
|
|
|
PC signal |
|
|
|
|
|
|
|
|||||||||||||||
|
|
|
|
|
|
|
|
|
connector to U401 |
|
|
|
|
|
|
component |
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NG |
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|||
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
OK |
|
|
|
HDMI signal |
|
|
Check U507 |
|
|
|
|
|
|
Replace U507 |
|
|||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
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|
|
|
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|
|
|
|
|
|
NG |
|
|
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|
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|
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Check U401 |
|
|
|
|
Replace U401 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
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|
||||||
|
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OK |
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NG |
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Check panel |
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Replace panel |
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19
32″LCD TV |
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AOC L32W831 |
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5. No sound |
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Check the source |
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Reset source |
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OK |
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NG |
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Check signal filter circuit |
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Replace the filter or inductance |
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NG |
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Check Earphone jack |
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Replace the Earphone jack |
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SIF signal |
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Check TV system setup |
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OK |
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OK |
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NG |
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Check TU701 |
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Replace TU701 |
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AV/SV/COMP |
NG |
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NG |
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Check U603 |
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Replace the failure |
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ONENT/PC |
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signal |
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component |
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NG |
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Check U507 |
NG |
Replace U507 |
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HDMI signal |
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NG |
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Check U603 |
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Replace U603 |
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NG |
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Check U606 |
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Replace U606 |
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OK |
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NG |
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Check speaker |
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Replace speaker |
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20
32″LCD TV |
AOC L32W831 |
6. Key Board
OSD is unstable or not working
Is Key Pad Board connecting normally? |
N |
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Connect Key Pad Board |
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Y |
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Is Button Switch normally? |
N |
|
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Replace Button Switch |
|||
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|||
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Y |
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N |
|
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Is Key Pad Board Normally? |
Replace Key Pad Board |
|||
|
||||
Y |
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Check Main Board |
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21