Olevia 237T, T11 Schematic

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Service Manual

LCD TV For 237-T11

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Service Manual

LCD TV For 237-T11

Model Number: 237T Model Name:237-T11 FM Number.：：：：FM1

FM1----037000EGS25

037000EGS25

FM1FM1

037000EGS25037000EGS25

FM1----037000EGS36

037000EGS36

FM1FM1

037000EGS36037000EGS36

FM1----03700DEGS46

03700DEGS46

FM1FM1

03700DEGS4603700DEGS46

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TITLE

Service Manual

LCD TV For 237-T11

Hans Chung

2007/11/19

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Jill kao

2007/11/19

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Service Manual

LCD TV For 237-T11

Document change / update record

Update date Version Page Update record

2007/07/03 V1.1

2007/11/19 V1.2

Updated Parts list(LPL WX4-SLA1)

Updated Parts list(LPL WX1-SL01 /LPLWX1-SLA1)

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Service Manual

LCD TV For 237-T11

Table of Contents

1. Introduction……………………………………………………………….……………………………….......4

1-1 Preface……………………………….……………….……………………….…………………………..4 1-2 Caution…………………………………………………..……………………………..………………….4

1-3 Warning………………………………………………………..…………………………….……………4 1-4 Important………………………………………………………..…………………………………………4

2. Specifications…………………………………..……………….……………………………………………5

3. Diagram………….…………….………………………………………………………………….………….6 3-1 Wiring Diagram……………………..……………………………………………….……………………6

3-2 System Block Diagram（Video）………………………………………………………..…………………7

3-3 System Block Diagram（Audio）………………………………………….……………………………….8

4. Trouble shooting flow chart……………………………………………………………..…………………….9

4-1 Abnormal Display…………………………………………………………………………..…………....9

4-2 Abnormal Power On/Off………………………………………………………………………………..10

4 - 3 L E D L i g h t A b n o r m a l D i s p l a

y 、 K e y p a d

P r o b l e m

4-4 Image Abnormal Display……………………………………………………………..………………….12 4-5 Audio Abnormal Output…………………………………………………………………..……………..13 4-6 The Other Abnormal Display……………………………………………………….…………………..14

5. Disassembly……………………………………………………………………………………….…………15 5-1 Stand.……………………………………………………….…………………………………………….15

5-2 Back Cover……………………………………………………………………..…………………………15 5-3 System Board………………………………………………………………………..………………….16 5-4 Power Module for LPL-WX1…………………………………………………………………………17 5-5 Power Module for LPL-WX4……………………………………………………………………………18 5-6 Panel Module…………………………………………………………………………………………….19 5-7 Speakers.…………………………………………………………………………….…………………..20 5-8 Keypad Board……………………………………………………………………………………………21

6. Factory Menu.………………………………………………………………………………………………..22

7. Firmware upgrade…………………………………………………………………………………………..23

8. EDID write in and ADC correction and Parameter Adjustment……………………………………..……..29 8-1 EDID write in…………………………………………………………………………………………...29

8-1.1 EDID tools……………………………………………………………………………………………29 8-1.2 EDID write in…………………………………………………………………………………………29

8-2 ADC Correction and Parameter Adjustment……………………………………………………..………30 8-2.1 ADC Correction………………………………………………………………………………………30

8-2.2 Parameter Adjustment.………………………………………………………..………………………31

9. Exploded view………………………………………………………………………………………….…...32

10. Parts List and Photo………………………………………………………………………………………....33

10-1 Parts List For LPL SL01.………………..................................................................................................33

10-2 Parts Photo For LPL SL01..……………………………………………………………………………35

10-3 Parts List For LPL SLA1………………..................................................................................................45

10-4 Parts Photo For LPL SLA1.……………………………………………….…………………………47

10-5 Parts List For LPL WX4..……………….................................................................................................57

10-6 Parts Photo For LPL WX4..…………………………………………………………….………………59

11. Menu wheel…………………………………….……………………………..…………………………...69

… … … … … … … … … … … … … … … … … … … … … . . 1 1

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Service Manual

LCD TV For 237-T11

1. Introduction

1-1 Preface

This service manual describes module-level LCD TV repair for qualified service personnel. This service manual also includes selected production troubleshooting information for electronic technicians and engineers.

1-2 Caution

This service manual contains important safeguards and instructions that must be followed for the safe and proper servicing of this TV.

1-3 Warning

1. Advise customers to follow all operating instructions and safety precautions that have been

furnished with the product.

2. Unplug the ac line cord before cleaning or disassembling the product.

3. Check the ac line cord and plug for wear or damage and replace as necessary.

4. Do not use liquid cleaners or aerosol cleaners to clean the display.

5. Do not place the product on an unstable table or cart. It can cause the product to fall, resulting

in injury and product damage. If a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

6. Use only replacement parts specified by the manufacturer or replacement parts with the same

performance and safety characteristics. Use of substitute parts with different characteristics can result in fire or electric shock.

7. Do not hit the LCD panel. In case of breakage, use care when removing broken glass.

8. Keep the product away from heat sources such as radiators, heaters, stoves, and other

heat-generating apparatus.

9. Do not block any ventilation openings.

10. Do not use the product near water; for example, near a bathtub, washbasin, kitchen sink

laundry tub, in a wet basement, or near a swimming pool.

11. If the product uses a grounded-type ac plug and line cord, but the location has a 2-prong

receptacle, advice the customer to contact a qualified electrician to replace the outlet.

-4 IMPORTANT INFORMATION FOR TECHNICIAN!

1. After service, press RESET for original factory defaults.

2. Look at the FM Label on the back of the TV to confirm this number is the part list on the Front cover.

3. There is no identification label for the237-T11.

4. Chip swap front panel (TBD)

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Service Manual

LCD TV For 237-T11

2. Specifications

PRODUCT SPECIFICATIONS

LCD Panel 37" TFT 37" TFT(LPL-WX4) Power Management

(Standby Mode)

Displayable Resolution VGA 1360*768 max. VGA 1366*768 max. Pixel Pitch 0.200mm * 0.600mm * RGB 0.200mm*0.600mm*RGB LCD Display Color 8-bit, 16.7M colors 8-bit, 16.7 M colors Viewing Angle CR>10

Contrast Ratio 800:1 (Typ.) 1000:1 (Typ.)

Response Time 9ms (Gray to Gray) 9ms (Typ.) Active Display Area H: 819.6mm, V:460.8mm H: 819.6mm, V:460.8mm RF Tuner ATSC/NTSC Hybrid Terrestrial

Power Voltage: 100~240 V

Speaker 15W 15W Compliance FCC, cUL, CSA, Energy Star FCC, cUL, CSA, Energy Star Temperature

＜＜＜＜ 1W ＜＜＜＜ 1W

CR>10 R/L 178 (Typ.) U/D 178(Typ.)

R/L 178 (Typ.)

U/D 178(Typ.)

ATSC/NTSC Hybrid Video Module Input level: ~107dBµV Range: NTSC 55 to 804 MHz, 2-69 channels for Off-Air and 2-125 channels for CATV

Terrestrial Video Module

Input level: ~107dBµV

Range: NTSC 55 to 804 MHz,

2-69 channels for Off-Air and

2-125 channels for CATV

Voltage: 100~240 V/ Consumption: 190W

AC/50~60Hz

Consumption: 190W

2.5A(MAX)

Operating: 0℃℃℃℃~40℃℃℃℃

Storage: -10℃℃℃℃~60℃℃℃℃

Weight w/o stand 50.72lbs 50.72lbs

Weight w/ stand 52.9lbs 52.9lbs

Gross Weight 62.84lbs 62.84lbs

Dimensions (WxHxD) 36.73 inches x 29.33 inches x

10.24 inches

Carton Dimensions (WxHxD)

41.34 inches x 32 inches x 12 inches

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36.73 inches x 29.33 inches x

10.24 inches

41.34 inches x 32 inches x 12

inches

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3. Diagram

3-1 Wiring Diagram

Service Manual

LCD TV For 237-T11

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3-2 System Block Diagram (Video)

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3-3 System Block Diagram (Audio)

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Replace System

board if voltage

1. Check for a loose video

cable connection

3. Change source

Secure connection

Fai

l

Fai

l

Fai

l

Fai

l

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LCD TV For 237-T11

4. Trouble shooting flow chart

4-1 Display Problems

Note: Refer to the Wiring Diagram during troubleshooting for a visual of inter-connections when indicated by this symbol.

Display Problems

Trouble Condition Check Item Replace Material Test

Abnormal display

1. No video Image

2. Video noise

3. Display flashes

4. Abnomal color

Bright spots

Dark spots

Backlight

uniformity

Light leakage

Spot & Simi

Ghosting

Dust & Scratch

Step1：

2. Check video cable

3. Check source settings

OK

Step2：

Check for a loose or broken connection between Con.J11from system board to Panel LVDS connection.

OK

Step3：

1. Check System board CN1-pin1 to ground = 5V, pin3 to ground = 5V or D4, D64 lighting

2. Check System Board CN2-pin2 to ground = 12V

Step1:

Check damage to

panel

OK

Step2:

Check for a loose or broken connection between Con.J11from system board to Panel LVDS connection.

1. Reconnect cable

2. Replace cable

Fai

settings

4. Change TV input

or replace the LVDS wire

Replace Panel

Replace LVDS

connect wire

is missing.

Test

Finish

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Abnormal Power

lighting?

Service Manual

LCD TV For 237-T11

4-2 Abnormal Power On/Off

Trouble Condition Check Item

Abnormal Power

On/Off

No Power

Note: Before proceeding confirm that Power cable is connected and that proper voltage is being fed to TV. (Check power switch located next to power input and confirm that it’s ON.)

Shut down

Source can’t

Off

switch

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Step1: Check Power Supply, Con. J101–pin 1 to ground = 5V Con CN1 pin 3 to ground = 5V

OK

Step2： Check Keypad board CN1-pin1 to ground = 5V or Check D1

OK

Step3： Check System Board CN1 pin1 to ground = 5Vs, and pin3 to ground = 5V, Check D4, D64 lighting?

Replace Material

Fail

Replace Power

Fail

Replace Keypad

Fail

Replace System

Test

supply

board

Test

Finish

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Con.

Secure connection

a loose connection

Service Manual

LCD TV For 237-T11

4-3 LED is Malfunctioning、、、、Keypad Problem

Trouble Condition

LED is Malfunctioning

LED is not working

Note: Before proceeding confirm that Power cable is connected and that proper voltage is being fed to TV. (Check power switch located next to power input and confirm that it’s

LED flashes

Keypad doesn’t work

Step1：

Check connector CN 10 on

System board to CN1

located on Keypad board for

Step2：

Check connector CN 10 on

System board to CN1

located on Keypad board for

Step 3：

Replace Keypad Board

Step 4：

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Check Item

Step1： Check CN 10 on system

board to CN 1 on

Keypad board for a

loose connection or bad

cable

OK

Step2：

Check Keypad board

D1 & CN1-pin 1 to

ground = 5V

OK

Step3：

Check System board

CN10-pin1 to ground

= 5V

Check Power supply

J101-pin1 to ground =5V

OK

a broken cable

OK

Fail

Replace System Board

Replace Material

Fail

Test

Secure connection

or replace cable

Replace board if

there is no voltage

Replace System

board if there is no

voltage

Replace Power

Supply if there is

no voltage

Replace Cable

Test

Finish

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Replace System

resolution to

or loose pins.

Step2

：

4. Check TV input

Service Manual

LCD TV For 237-T11

4-4 Image Abnormal Display

Trouble Condition Check Item

Image abnormal display

No picture through

Note: Before proceeding confirm that Power cable is connected and that proper voltage is being fed to TV. (Check power switch located next to power input and confirm that it’s

Note: Before proceeding make sure the PC is not in standby or hibernation mode. Make sure the video card is secure and not loose (AGP or PCI slot).

component

No picture through

composite

No picture through

S-Video

No Picture through

Tuner

No picture through

HDMI

No picture through

VGA

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Replace Material

Step1：

1. Check video cable connection

2. Check video cable

3. Check source settings

OK

1. Check System Board component L52, L49 L53, L50, L54, L51 for a short.

2. Check System Board component L65, L68 for a short

3. Check System Board component L59, L61 L62, L60 for a short

4. Check System Board component U103 for a short

5. Check CN9 broken? , D41 lighting? & U60 EDID OK?

Step1：

1. Check if VGA cable is loose.

2. Make sure the PC is set to a resolution the TV supports

3. Check both ends of VGA cable for broken

OK

Step2： Check component J4 on system board for a short & component U26 that stores EDID information

Fail

1. Reconnect cable

Fail

2. Replace cable

3. Change source settings

4. Change TV input

Fail

1. Secure connection

2. Change PC fit the timing table

3. Replace VGA cable

Replace System

Test

board

Test

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Finish

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on

cable

re external audio

Service Manual

LCD TV For 237-T11

4-5 Audio Abnormal Output

Trouble Condition Check Item

Audio Problems

Can’t adjustment

Make su

connection is secure

before proceeding with

troubleshooting

Volume

No audio

Step3： Check System board

No audio on one

side of speaker

No audio through

earphone

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CN2-pin1 to ground = 2V

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Check switches on the

keypad board

Step1： Check for loose connection between CN3 and peaker and CN4 and speaker

OK

Step2： Check if the Speaker

module is broken

OK

Step1：

1. Check earphone

connection

2. Check earphone

OK

Step2：

Check OSD speaker setting is off and not

OK

Step3：

Check System board

component J21 & Q12

for a short

Replace Material

Fail

Replace Keypad

Fail

Replace connect

Replace speaker

Replace System

1. Secure earphone

connection.

2. Replace Earphone

cable

Set the speaker

setting to off

Replace System board

Test

board

wire

module

board

Test

Finish

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Service Manual

LCD TV For 237-T11

4-6 The Other Abnormal Display

Trouble Condition Check Item

Sometimes picture

flashes

Olevia 237T, T11 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual