Sharp LC-32LB261U, LC-42LB261U, LC-50LB261U Schematic

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Service

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.

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

7. Adjustment..............................................................34

7.1 ADC and W/B Adjustment………………..…….34

7.2 F/W upgrade……………………..……………........35

7.3 DDC upgrade…………………..……………........36

8. Block Diagram.…….................................................37

9. Schematic……………...…………..……..…………...39

9.1 Main Board…………………………………...….......39

9.2 Power Board…………….…………...…………......53

9.3 Key Board……………….……………………….......63

9.4 IR Board………………………………..….…….......64

10. LOCATION Waveform and Voltage…………..….65

11. Exploded View……………………………….….…...68

12. BOM List……………….……………………………77

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

Important Safety Notice.......................................……......2

Revision List…………………………………………………3

1. General Specification..............................………...........4

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

3. Input/Output Specification…………....................…....6

4. Mechanical Instructions…………………….................9

5. Repair Flow Chart.……………………….…….…….....18

6. PCB Layout.………………..……………….....….........25

6.1 Main Board…………..……………...………...............25

6.2 Power Board……………..………….……….….......27

6.3 Key Board………………………..………………......33

6.4 IR Board…………………………..……………........33

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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, 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.)

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Revision List

Version Release Date Revision Instructions Customer Model TPV Model

A00 May.30.2014 Initial Release

LC-32LB261U E32E41NKFMBSNNX

LC-42LB261U E42E41NKFMBSNNX

LC-50LB261U E50E41NKFMBSNNX

A01 Jun.13.2014 Add New Model LC-32LB261U E32E51NKFMBSNNX

A02 Jul. 22.2014 Add New Model

LC-32LB261U E32E41NKFMBPNNX

LC-42LB261U E42E41NKFMBPNNX

LC-50LB261U E50E41NKFMBPNNX

A03 Oct. 30.2014 Add New Model

LC-32LB261U

E32E41NKFMBRNNX

E32E51NKFMBRNNX

LC-42LB261U E42E41NKFMBRNNX

LC-50LB261U E50E41NKFMBRNNX

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1. General Specification

Please refer to user manual.

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2. Operating Instructions

Please refer to user manual.

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3. Input/output Specification

3.1 RGB Signal Input

15 - Pin Color Display Signal Cable

1 Red Video 9 VGA 5V

2 Green Video 10 Sync Ground

3 Blue Video 11 Uart RX

4 Uart TX 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 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

3.3 USB

PIN Signal Assignment PIN Signal Assignment

1 VCC 2 Data-

3 Data+ 4 GND

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3.4 AV Signal Performance

3.4.1 Video / Component Video Input

All tests must be performed under “video standard testing conditions” unless otherwise specified

3.4.2 AV (Composite Video Input)

Video

System NTSC

Amplitude 1.0 V (p-p), negative sync.

Impedance 75 ohm terminated

3.4.3 Component (Y, Pb/Cb, Pr/Cr Input)

Component

System 480i, 480P, 720P, 1080i, 1080P

Y signal amplitude 1.0Vpp (including sync)

Cr, (R-Y) / Cb, (B-Y)

Signal amplitude

±0.35Vpp, 75 ohm

Impedance

75 ohm terminated

Y = 0.299R + 0.587G + 0.114B

(R-Y) = 0.701R + 0.587G + 0.114B

(B-Y) = 0.299R + 0.587G + 0.886B

3.5 Compatible Mode Table

Analog RGB Input Signal Timing

Supported

Resolution

H(KHZ) V(HZ) Standard EDID Assignment

Panel Type

NOTE2

H×V

1366X768 1920X1080

640×480

31.5 60 VESA DMT

Established Timings

YES YES

720×400

31.5 70 VESA DMT

Established Timings

YES

800×600

37.9 60 VESA DMT

Established Timings

YES

800×600

35.1 56 VESA

Established Timings

YES

1024×768

48.4 60 VESA DMT

Established Timings

YES

1280×768

47.4 60 VESA DMT

Detailed Timing

Description 2

YES

YES NOTE3

1280×720

45 60 VESA DMT

Standard Timing

Identification

YES

YES 16:9

1280×800

49.7 60 VESA DMT

Standard Timing

Identification

YES

YES 16:10

1280×800

62.8 75 VESA DMT

Standard Timing

Identification

YES

16:10

Mandatory

1280×960

60 60 VESA DMT

Standard Timing

Identification

YES

YES 4:3

1280×1024

64 60 VESA DMT

Standard Timing

Identification

YES

YES 5:4

1440×900

55.9 60 VESA DMT

Standard Timing

Identification

YES

YES 16:10

1680×1050

65.3 60 VESA DMT

Standard Timing

Identification

NOTE1

YES

16:10

Mandatory

1920×1080

67.5 60 CEA-861

Detailed Timing

Description 1

NO

YES NOTE3

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HDMI Input Signal Timing:

Supported

Resolution

H(KHZ) V(HZ) Standard

EDID

Assignment

Panel Type

NOTE2

H×V

1366X768 1920X1080

640×480

31.5 60 VESA DMT

Established

Timings

YES

720×400

31.5 70 VESA DMT

Established

Timings

YES

800×600

37.9 60 VESA DMT

Established

Timings

YES

800×600

35.1 56 VESA

Established

Timings

YES

1024×768

48.4 60 VESA DMT

Established

Timings

YES

1280×768

47.4 60 VESA DMT

Detailed Timing

Description 2

YES

YES NOTE3

1280×720

45 60 VESA DMT

Standard Timing

Identification

YES

YES 16:9

1280×800

49.7 60 VESA DMT

Standard Timing

Identification

YES

YES 16:10

1280×800

62.8 75 VESA DMT

Standard Timing

Identification

YES

16:10

Mandatory

1280×960

60 60 VESA DMT

Standard Timing

Identification

YES

YES 4:3

1280×1024

64 60 VESA DMT

Standard Timing

Identification

YES

YES 5:4

1440×900

55.9 60 VESA DMT

Standard Timing

Identification

YES

YES 16:10

1680×1050

65.3 60 VESA DMT

Standard Timing

Identification

NOTE1

YES

16:10

Mandatory

1920×1080

67.5 60 CEA-861

Detailed Timing

Description 1

YES

YES NOTE3

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4. Mechanical Instructions

LC-32LB261U

1. Remove the screw to remove the BASE.

2. Remove the screw to remove the REAR COVER.

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3. Remove the connectors and screws to remove MAIN BOARD, POWER BOARD, SPEAKERS, BKT_IO.

4. Remove the screw to remove BKT_STAND, KEYPAD, IR BOARD.

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5. Remove the screw to remove FFC CABLE, DECO.

6. PANEL.

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LC-42LB261U

1. Remove the screw to remove the BASE.

2. Remove the screw to remove the REAR COVER.

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3. Remove the connectors and screws to remove MAIN BOARD, POWER BOARD, SPEAKERS, BKT_IO.

4. Remove the screw to remove BKT_STAND, KEYPAD, IR BOARD.

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5. Remove the screw to remove FFC CABLE, DECO.

6. PANEL.

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LC-50LB261U

1. Remove the screw to remove the BASE.

2. Remove the screw to remove the REAR COVER.

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3. Remove the connectors and screws to remove MAIN BOARD, POWER BOARD, SPEAKERS, BKT_IO.

4. Remove the screw to remove BKT_STAND, KEYPAD, IR BOARD.

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5. Remove the screw to remove FFC CABLE, DECO.

6. PANEL.

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5. Repair Flow Chart

1. No power

No power (LED “Off”)

Check the AC input and

the

p

ower is “ON”?

Power “On”

Check the IR board and LED

Replace the IR board

Replace the main board

Power board

out

p

ut=12V

,

5V?

Replace the power board

No

Yes

No

Yes

No

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2. Can’t start

Can’t start（LED red）

Replace the main board

Replace the Power board

No

Yes

No

Yes

No

Power board output＝12,19.5V?

Check the power key is under control?

Check the IR receiver is normal?

Replace the power board

Replace the key board

Yes

Replace the IR board

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3. Abnormal display

Abnormal Display

Reset the source

Check the source

Check the panel

Replace the main board

Replace the LVDS cable

Replace the panel

No

Yes

No

Check the main board

Enter factory mode to do

“EEPROM initial”&“Reset”

Check the LVDS cable

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4. No display

Check the B/L

signal is available?

Replace main board

Replace the power board

Panel Vcc = 12V?

Replace the Panel

No display (LED blue)

Replace the main board

Check the backlight is

“On”?

Check the LVDS cable

Reinsert or replace the

LVDS cable

Replace the main board

Replace the Panel

No

Yes

No

Yes

No

Yes

No

Yes

No

Power board output＝12V,19.5V?

Check TV is under control and power

on/off by remote control and power key?

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5. Sound problem

No

Check the cable between the

speakers and main board is OK?

No sound or sound abnormal

Check the TV is muted, adjust the

volume or enter the menu to reset?

Reinsert the audio cable or

change the TV system

Replace the cable

Replace the speaker

Replace the main board

No

Yes

Check the speaker resistance value is in spec

(Remark: The value is marked on the speaker)?

Check the audio source connection

and the TV system are correct?

Yes

No

Yes

No

Enter factory mode to do “Reset”

No

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6. Remote control malfunction

Remote Control malfunction

Replace the battery

Replace the remote control

Whether the IR board is

abnormal?

Yes

No

Replace the IR board

Replace the main board

No

Yes

No

Yes

Use the other remote controls

Check the remote control battery is

not properly placed or no power?

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7. OSD is unstable or can’t work normally

Key board connected properly?

Reconnect the key board

Buttons are OK?

Replace the button function

Yes

No

Key board is OK?

Replace the key board

Replace the main board

No

Yes

No

OSD is unstable or can’t work normally

Enter factory mode to do “Reset”

Yes

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6. PCB Layout

6.1 Main Board

715G6840M0D000004

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6.2 Power Board

715G6896P01000003H (32”)

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715G6335P01003003 (42” & 50”)