AOC LE22H067, LE24H067 Schematic

21.5″&23.6″ LCD TV AOC LE22(24)H067

Service

Service

Service

31~68 KHz

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 Menus….....………………….……….......6

2.3 How to Connect……..……………….…….……….....17

2.4 Front Panel Control Knobs…….………….……….....19

3. Input/Output Specification…………....................…....20

4. Mechanical Instructions…………………….................22

5. Repair Flow Chart ……………………….…….…….....24

6. PCB Layout ………………..…………………....….......30

6.1 Main Board…………..………………...…….…….......30

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS

6.2 Power Board………………..…….…….……….......32

6.3 LED Board...………………..…….…….……….......40

6.4 Key Board………………………..……..……….......40

6.5 IR Board………………………….……..……….......41

7. Adjustment……..………………………….................42

8. Block Diagram.…….................................................43

9. Schematic Diagram…..…………....………………...44

9.1 Main Board…………………………………...….......44

9.2 Power Board…………..….….……...………….......54

9.3 LED Board…….…………..….……...………….......60

9.4 Key Board……………….……….…………….........62

9.5 IR Board……...………….……….…………….........63

10. Exploded View………………………………….…...64

11. BOM List……………….………………….………….67

Horizontal Frequency

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 Customer Model TPV Model

LE22H067 E22A2ZNKWEE6NN

A00 Jun.7,2010 Initial Release

LE24H067 E2CA6ZNKWEE6NN

Lead in the new LED board:
715G4614T01000004S
Update are as below:

Layout
Schematic Diagram
BOM List

A01 Dec.7,2010

A02 Jan.18,2011 Add New Model LE24H067 E2CA6ZNKWEM55N

A03 May.13,2011

Lead in the new Power&LED board:
715G3798T02000004S&
715G4147P01H21002S&
715G4614T01000004S
Update are as below:

Layout
Schematic Diagram
BOM List

Add new power board
715G4313P02000003S
Update are as below:

Repair Flow Chart
PCB Layout
Schematic Diagram
BOM List

LE22H067 E22A2ZNKWEE65N

LE24H067 E2CA6ZNKWEE65N

LE24H067 E2CA6ZNKWEAENN

LE22H067 E22A2ZNKWEE55N

3

1. General Specification

Model LE22H067/LE24H067

Panel Size

Resolution

TV System

Channel Coverage

Speaker

Antenna Impedance

Power Source

Standby Power Consumption

Video/Audio Terminals

S-Video Input*

Video/Audio Input

Component Input

HDMI Terminals

VGA Terminals

Headphone

SPDIF Output

LE22H067: 546 mm diagonal (21.5” viewable)
LE24H067: 598 mm diagonal (23.6” viewable)

1920 x 1080

NTSC standard ATSC standard (8-VSB, Clear-QAM)

VHF: 2 through 13
UHF: 14 through 69
Cable TV:
Mild band (A - 8 through A - 1, A through I)
Super band (J through W)
Hyper band (AA through ZZ, AAA, BBB)
Ultra band (65 through 94, 100 through 125)

3 W x 2

75Ω

120V 60Hz, 50W

<1W

Rear AV x1: S-Video/Video/Audio Input/Audio output.

Y: 1 V (p-p), 75 ohm, negative sync.
C: 0.286 V(p-p) (burst signal), 75 ohm

VIDEO: 1 V(p-p), 75 ohm, negative sync. AUDIO: 500mv (rms)

Rear Component x1:

Y: 1V(p-p), 75 ohm, including sync.

Pr/Cr: ±0.35V(p-p), 75 ohm Pb/Cb: ±0.35V(p-p), 75 ohm

AUDIO: 500mv (rms)

HDMI INPUT: Rear HDMI x1; Side HDMI x1

HDCP compliant
E-EDID compliant

VGA INPUT:
Rear VGA (D-SUB 15 Pin) Input x1 E-EDID compliant
Audio Input: Mini-jack for stereo (3.5Ø )

Audio Output: Mini-jack for stereo (3.5Ø )

Optical Digital Audio Out jack.

Size (W x H x D)
(With Base And Stand) (Mm)

Weight

Wall Mount Size

Wall-Mount Accessory
Equipment:

Operation Temperature
Storage Temperature

LE22H067: 526.91x 394.95x 150
LE24H067: 571.2 x 420.2 x 160

LE22H067: 3.75 Kg (with stand) / 3.5 Kg (w/o stand and base)
LE24H067: 4.2 Kg (with stand) / 3.9 Kg (w/o stand and base)

LE22H067: 100 x 100 mm (Wall mount kit is not included)
LE24H067: 100 x 100 mm (Wall mount kit is not included)

Optional accessory and not included in standard package

35 ºC for moderate climates (Maximum ambient temperature)

-20 ºC~50 ºC

* S-Video Input

You can connect your TV set to a high-resolution video source (such as Super VHS videocassette recorder, Laser
Disc player, and DVD Home Theater Set) in order to provide maximum consumer viewing satisfaction.

Note:

1. Designs and specifications are subject to change without notice.

2. This model may not be compatible with features and/or specifications that may be added in the future.

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2. Operating Instructions

2.1 The Use of Remote Control

5

2.2 To Use the Menus

6

7

8

9

10 11 12 13 14 15 16

2.3 How to Connect

17

18

2.4 Front Panel Control Knobs

19

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 SDA(Remote Control)

4 SCL(Remote Control) 12 Serial Data for DDC

5 Ground 13 H-Sync.

6 Red Video Ground 14 V-Sync.

7 Green Video Ground 15 Serial Clock for DDC

8 Blue Video 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

20

3.3 Compatible Mode Table

Presetting PC Mode

Standard Resolution

VESA 640 x 480 31.469 59.94
VESA 800 x 600 37.879 60.317
VESA 1024 x 768 48.363 60.004
VESA 1280 x 720 44.772 59.855
VESA 1280 x 768 47.396 59.995
VESA 1280 x 1024 63.981 60.02
VESA 1440 x 900 55.469 59.901
VESA 1680 x 1050 65.29 59.954
VESA 1920 x 1080 67.5 60

Presetting Video Mode

Standard Resolution

SD 480i 15.734 60
SD 480P 31.5 60
HD 720P 45 60
HD 1080i 33.75 60

FHD 1080p 67.5 60

Horizontal Frequency

(KHz)

Horizontal Frequency

(KHz)

Vertical Frequency (Hz)

Vertical Frequency

(Hz)

21

4. Mechanical Instructions

1. Remove the screws to remove the stand, base and rear cover.

2. Remove the screws to remove AC cover.

22

3. Remove the screws to remove main board, power board and hinge BKT.

4. Remove the screws to remove AC BKT, key board, IR board and speakers.

23

p

p

5. Repair Flow Chart

1. No power

No power (LED “Off”)

Check the AC input and
the

ower is “ON”?

Yes

Power board

out

ut=5.2V?

Yes

Check the IR board and LED

Replace the IR board

No

Replace the main board

No

Power “On”

No

Replace the power board

24

2. Can’t start

Can’t start（LED red）

Power board output＝16V?

Yes

Check the power key is under control?

No

Check the IR receiver is normal?

No

Replace the power board

Yes

Replace the key board

Yes

Replace the IR board

No

Replace the main board

No

Replace the Power board

25

3. No display

No display (LED blue)

Check TV is under control and power
on/off by remote control and power key?

Yes

Check the LVDS cable

Yes

Yes

Check the backlight is

“On”?

No

Reinsert or replace the
LVDS cable

No

No

Check the B/L

signal is available?

Yes

Replace the main board

No

Replace main board

Panel Vcc = 5V?

Yes

Replace the Panel

No

Replace the main board

Power board output＝16V?

Yes

Replace the Panel

Replace the power board

No

26

4. Sound problem

No sound or sound abnormal

Check the audio source connection

and the TV system are correct？

Yes

Check the TV is muted, adjust the

volume or enter the menu to reset?

No

Check the cable between the

speakers and main board is ok?

No

Reinsert the audio cable or
change the TV system

No

Yes

Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?

Yes

Replace the speaker

Replace the main board

Replace the cable

No

27

5. Remote control malfunction

Remote Control malfunction

Check the remote control battery is
not properly placed or no power?

No

Use the other remote controls

No

Whether the IR board is

abnormal?

No

Replace the main board

Yes

Replace the battery

Yes

Replace the remote control

Yes

Replace the IR board

28

6. OSD is unstable or can’t work normally

OSD is unstable or can’t work normally

Key board connected properly?

Yes

Buttons are ok?

Yes

Key board is ok?

Yes

Replace the main board

No

Reconnect the key board

No

Replace the button function

No

Replace the key board

29

6. PCB Layout

6.1 Main Board

715G3759M01000005K

30