AOC L37W465 Schematic

37’’ LCD TV AOC L37W465

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CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

7.PCB Layout……….……….….……………...….…….....26

7.1 Main Board…………………..……….…...……...........26

7.2 Power Board…………...…...……………….....….......28

7.3 Key Board….…......…………...............…..................29

8.Block Diagram..……..............…..................................30

8.1 Main Board......……….…..……................................30

8.2 Power Board…...……...….…....................................31

9. Schematic Diagram...……………………………….......32

9.1 Main Board…….........…..……..………......................32

9.2 Power Board...………………….……………………...50

9.3 Audio Board…………………..……….………………..51

9.4 Key Board …………….………………………………..52

9.5 Side Board………….…………………………………..53

10.Exploded View………………….....………...……….....54

11.BOM List……….....…………….…….…..….…….....…56

12.Different Parts List…………………………...……...….88

Table Of Contents.......…….…..............................…........1

Revision List.…….…............................................…….....2

Important Safety Notice.……..................……………........3

1. Monitor Specification..…............................………........4

2. Operating Instructions……...……………….……….......5

2.1 The Use Of Remote Control..………….…..................5

2.2 Front Panel Control Knobs..............….........…...........6

2.3 OSD Operations…………….…............……...............7

2.4 How To Connect...……….........................….............14

3. Input/Output Specification............………….…...........16

3.1 Input Signal Connector............……………...............16

3.2 Factory Preset Display Modes........………...............17

4. Mechanical Instructions..………....……......................18

5. Repair Flow Chart…….……………………..................22

6. White Balance, Luminance Adjustment………...….....24

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.

37’’ LCD TV AOC L37W465

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Version

Release Date

Revision History

TPV Model

A00

Dec.-25-2006

Initial Release

E376AZNKD1A2NP

A01

Nov.-11-2008

Update BOM

E376AZNKD1A2NP

Add new BOM

E376AZNKW1A52N

Revision List

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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 may 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 radiation 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.)

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1. General Specification

37’’ LCD TV AOC L37W465

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2. Operations Instructions

2.1 The Use of Remote Control

Remote control button function as follow

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2.2 Front Panel Control Knobs

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2.3 OSD Operations

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37’’ LCD TV AOC L37W465

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37’’ LCD TV AOC L37W465

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37’’ LCD TV AOC L37W465

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37’’ LCD TV AOC L37W465

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37’’ LCD TV AOC L37W465

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37’’ LCD TV AOC L37W465

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2.4 How to Connect

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37’’ LCD TV AOC L37W465

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Pin

Signal Assignment

Pin

Signal Assignment

1

Red Video

9

No Pin!

2

Green Video

10

Sync. Ground

3

Blue Video

11

SDA (Remote Control)

4

SCL (Remote Control)

12

Serial Data for DDC

5

GROUND

13

Horizontal Sync.

6

Red Video Ground

14

Vertical Sync.

7

Green Video Ground

15

Serial Clock for DDC

8

Blue Video Ground

Pin

Signal Assignment

Pin

Signal Assignment

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

3. Input/Output Specification

3.1 Input Signal connector

This procedure gives you instructions for installing and using the LCD TV display.
Lay the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord
must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical
conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer
should attach the proper adapter to ensure a safe ground potential.

Connect the 15-pin D-SUB color display shielded signal cable to your signal system device and lock both screws on
the connector to ensure firm grounding. The connector information is as follow:

15 - Pin Color Display Signal Cable

HDMI Digital connector pin assignments

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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

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

460875

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

VESA MODES

Horizontal

Vertical

Mode

Resolution

Total

Nominal

Frequency

(KHz)

Sync

Polarity

Nominal

Freq.

(Hz)

Sync

Polarity

Nominal

Pixel

Clock

(MHz)

720P

1280×720P

45.00

60 74.25

1080i

1920X1080i

33.75

60 74.25

480P

720X480P

31.54

60 27.00

Apply power to the display by turning the power switch to the "ON" position and allow about ten seconds for

Panel warm-up. The Power-On indicator lights "GREEN" when the display is on.

With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and
contrast to the most pleasing display, or press auto-adjust to get the best picture-quality.

This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the signal
cable to the PC.

If your TV requires service, it must be returned with the power cord.

3.2 Factory Preset Display Modes:

Analog RGB input signal timing

HDMI input signal timing

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Step

Figure

Descripti

on

Preparation

and Remove

base

Remove
the screws
remarked
in red

Remove back
cover

Remove
the screws
Remarked
in red

Remove the
shield

Remove
the screws
Remarked
in red

4. Mechanical Instructions

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Remove the
boards

Remove
the screws
Remarked
in red

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Remove
main frame

Remove
the screws
remarked
in red

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Remove the
bezel

Remove
the screws
remarked
in red

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CHECK CON901 PIN9＝12V
CON905 PIN3=5V?

Check POWER BOARD

NG

OK

CHECK CN407 PANEL connect is
normal?

Reconnect CN407

NG

CHECK X401、X701 is normal?

Check surge circuit

CHECK U108 PIN18, PIN17, PIN14 output wave is OK;
PIN9 PIN20 power supply is OK?

CHECK U401 PIN R5、PIN T8=3.3V?
U401 PIN E6=2.5V? PIN R9=1.8V?

CHECK SCALER power

Check Tuner circuit

Check TV mode display is normal?

CHECK I²C1DATA, CLK is normal?

CHECK SCALER HS VS is normal?

OK

OK

OK

OK

OK

OK

NG

NG

OK

OK

5. Repair Flow Chart

5.1 Abnormal display

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Check SF701 PIN5、4 signal
input is normal?

Check TUNER circuit

Check ZR39660BGCG (U401) is normal?

CHECK X701 surge is normal?

Check CAS-220/CS (U701) is
normal?

Check speakers are ok?

Check earphone is normal?

Check Q2 MUTE circuit

Check TPA6110A2 (U600)
Relative circuit is normal?

Test NJM2199 (U2) PIN 12 PIN
11 output is normal?

Check CS4335 (U405) PIN5
PIN 8 output is normal?

Check NJM2199 (U2) PIN8 power
supply is normal?

OK

OK

NG

OK

OK

OK

OK

OK

OK

OK

NG

NG

NG

5.2 No sound

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Color Temp.

Cold

Normal

Warm

PC MODE

x

291

299

308 y 306

315

325 Y 350

350

350

AV MODE

x

291

299

308 y 306

315

325 Y 450

450

450

HDMI

x

291

299

308

y

306

315

325

Y

420

420

420

COMPONENT
（480i/480p）

x

291

299

308 y 306

315

325

Y

450

450

450

6. White Balance, Luminance Adjustment

Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.

First adjust PC mode and then adjust AV mode, HDMI mode, component 480i mode, component 480p mode. Before
started adjust white balance, please set the Chroma-7120 MEM. Channel 01 to Cold color MEM. and channel 03 to
Normal color, MEM. and channel 04 to warm color, MEM.(Our cold parameter is x = 291, y =306; normal parameter is
x =299, y =315; warm parameter is x =308, y =325)

Note: The tolerance of the color coordinates should be less than ± 20.

How to setting MEM. channel you can reference to Chroma-7120 user guide or simple use “ SC” key and “ NEXT” key
to modify x, y , Y value and use “ID” key to modify the TEXT description
Following is the procedure to do white-balance adjust

Note: Step of AV, HDMI, COMPONENT480i, COMPONENT480p mode adjustment is the same as PC mode,

PC mode:
Ⅰ. In the TV mode adjust volume to zero and press number key 9  8  7  6. It will achieve the
factory mode. Select the item of White Balance and press right key to enter it.

In the White Balance you can adjust 8 items.

1-3 items is RO, GO, BO  R, G, B Bias adjust.
4-6 items is RG, GG, BG  R, G, B Gain adjust.
7 item needn’t adjust
8 items is color temperature select: Cool, Normal, and Warm.

Ⅱ. Bias (Low luminance) adjustment:

1. Set the raster pattern (Black pattern with 1024×768) Input.

2. Adjust the brightness on OSD until chroma 7120 measurement reach the lowest value.

Ⅲ. Gain adjustment:

A. Adjust Cold color-temperature:

1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350 cd/m2

2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)

3. Switch the MEM. channel to Channel 01 (with up or down arrow on chroma-7120)

4. The LCD-indicator on chroma-7120 will show x =291, y =306, Y>350cd/m2

5. Adjust the 4 item: RG, until chroma 7120 indicator reached the value R=100

6. Adjust the 5 item: GG, until chroma-7120 indicator reached the value G=100

7. Adjust the 6 item: BG, until chroma-7120 indicator reached the value B=100

8. Repeat above procedure until chroma-7120 RGB value meet the tolerance =100±2

9. Switch the chroma-7120 to x, y, Y mode with press “MODE” button to check the color temp is in SPEC. or not.

10. Enter the 8 item to select another color temperature to adjust.

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B. Adjust Normal color-temperature:

1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350cd/m2

2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)

3. Switch the MEM. channel to Channel 03 (with up or down arrow on chroma-7120)

4. The LCD-indicator on chroma-7120 will show x =299, y =315, Y>350cd/m2

5. Adjust the 4 item: RG, until chroma 7120 indicator reached the value R=100

6. Adjust the 5 item: GG, until chroma-7120 indicator reached the value G=100

7. Adjust the 6 item: BG, until chroma-7120 indicator reached the value B=100

8. Repeat above procedure until chroma-7120 RGB value meet the tolerance =100±2

9. Switch the chroma-7120 to x, y, Y mode with press “MODE” button to check the color temp is in SPEC. or not.

10. Enter the 8 item to select another color temperature to adjust.

C. Adjust Warm color-temperature:

1. Set the Contrast of OSD function to 80 and Adjust Brightness to chroma-7120 Y>350cd/m2

2. Switch the chroma-7120 to RGB-mode (with press “MODE” button)

3. Switch the MEM. channel to Channel 04 (with up or down arrow on chroma-7120)

4. The LCD-indicator on chroma-7120 will show x =308, y =324, Y>350cd/m2

5. Adjust the 4 item: RG, until chroma 7120 indicator reached the value R=100

6. Adjust the 5 item: GG, until chroma-7120 indicator reached the value G=100

7. Adjust the 6 item: BG, until chroma-7120 indicator reached the value B=100

8. Repeat above procedure until chroma-7120 RGB value meet the tolerance =100±2

9. Switch the chroma-7120 to x, y, Y mode With press “MODE” button to check the color temp is in SPEC. or not.

10. Enter the 8 item to select another color temperature to adjust.

Ⅳ.Switch different source:

Press the source key on the remote control to switch different source to adjust the AV, HDMI, CONPONENT 480i and
COMPONENT 480p mode.

Press “Exit” button on remote control to quit from factory mode.

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7. PCB Layout

7.1 Main Board

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