Polaroid TLM-22601B Schematic

26” LCD TV Polaroid TLM-22601B

Service

31~60 kHz

TABLE OF CONTENTS

Description Page Description Page

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

Revision List…………………………………………………2

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

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

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

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

2.2. To Use The Menu…...…………………….……….......6

2.3. How To Connect…….…………………….……….....12

2.4. Front Panel Control Knobs……………….……….....14

3. Input/Output Specification…………....................…....15

4. Mechanical Instructions…………………….................17

5. Repair Flow Chart ……………………….…….…….....21

6. PCB Layout ………………..………………....….......26

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

SAFETY NOTICE

6.1.Main Board…………..…………...……….......26

6.2.Power Board……………..………….………...28

6.3.Key Board………………………..……….......28

6.4.IR Board…………………………..……….......28

7. Adjustment………………………………............30

8. Block Diagram.……..........................................31

9. Schematic……………...…………..…………...32

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

9.2.Power Board…………………...………….......45

9.3.Key Board……………….….………….......46

10. Exploded View…………………………….…...47

11. BOM List……………….……………………….48

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

26” LCD TV Polaroid TLM-22601B

Revision List

Version Release Date Revision Instructions TPV Model

A00 Oct-22-2008 Initial Release E26RMZNKW9PV2N

26” LCD TV Polaroid TLM-22601B

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.)

26” LCD TV Polaroid TLM-22601B

1. General Specification

Items Specification

Panel Type V260B1-L11 26" CMO TW

Driving system TFT-LCD CMO Panel

Active Area 575.769(H) x 323.712(V)

Resolutions 1366 x768

LCD Panel

Television System TV Standard

Video Inputs

Audio Output Audio Output: L / R

OSD language English, etc

Wall Mount VESA 200 mm x 100 mm

Dimensions 651.9mm(W) x 481.4mm(H) x 219.5mm(L)

Weight 6.3KG

Brightness

Contrast 800:1

Pixel Pitch 0.1405mm x0.4215mm

Display colors 16.2 million

Color Temperature Cool / Warm/normal

AV RCA x 1

S-Video S-Video x 1

COMPONENT Y,Cb,Cr x 1 Audio channel L / Rx 1

HDMI 720p,1080i,480p,480i

PC VGA x 1 PC Audio in x 1

500 cd/㎡

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

Speaker (built-in): Two 11W speakers

SPDIF

Audio L/R x 1

Power

Environment

Power Supply AC100V~240V, 50/60Hz

< 120W

Power Consumption

Operating 0 °C ~ 40 °C

Storage -10 °C ~ 50 °C

Operating 10% ~ 85%

1 W in standby mode (power cord plugged in and power OFF)

26” LCD TV Polaroid TLM-22601B

2. Operating Instructions

2.1 The Use of Remote Control

26” LCD TV Polaroid TLM-22601B

SETU

2.2 To Use the Menus

1 Press the MENU button to display the main menu.

2 Press the ▽or △ button repeatedly to select a menu item.

3 Press the < or > buttons to enter a sub-menu.

4 Press the ENTER or > button to enter/display the function.

5 Press MENU or EXIT 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 of the menus are only available with specific

inputs/source.

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. Tuning Band: Select TV source signal from the Air (antenna) or Cable (CATV).

2. DTV Signal: Show the intensity of the received DTV signal.

P MENU

3. Auto Ch Search: Automatically scan all NTSC / ATSC 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. Add on Ch search: Add channels which are new found.

5. Manual Channel Set: Show the channel setup table. User can choose to display the ATSC or NTSC TV channels

and then edit the channel (Viewable or Not Viewable by pressing Enter button). User won’t be able to view the

channel that has been set to Not Viewable when toggling through channels. However, the channels are still

accessible when user enters the channel number.

6. Channel Labels: Show the NTSC / ATSC TV channel label menu for user modifying channel labels specifically.

7. Menu Language: Select the menu display language. (English / Espanol / Francais)

8. Aspect Ratio: Select the display aspect ratio. (Normal/Zoom/Wide/Cinema)

9. Favorite Channel Mode: When favorite channel mode is on, user can edit favorite channel table in favorite

channel set option.

26” LCD TV Polaroid TLM-22601B

IDEO 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.

1. Contrast: Video contrast adjustment, the tuning range is 0 ~ 100.

2. Brightness: Video brightness adjustment, the tuning range is 0 ~ 100.

3. Sharpness: Video sharpness adjustment, the tuning range is -50 ~ 50.

4. Color: Video color chroma adjustment, the tuning range is 0 ~ 100.

5. Tint: Video tint adjustment, the tuning range is R50 ~ G50.

6. Backlight: Backlight strength adjustment, the tuning range is 0 ~ 10.

7. Settings: Restore the default video settings.

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.

1. Audio Language: Change the audio language setting on ATSC TV programs .The number of the supported

audio languages depends on the ATSC TV programs.

2. Bass: Bass tone adjustment, the tuning range is 0 ~ 63.

3. Treble: Treble tone adjustment, the tuning range is 0 ~ 63.

4. Balance: Audio balance adjustment, the tuning range is L31 ~ R31.

5. Digital Audio Output: Digital audio output format selection, user can choose RAW (default) or PCM format or off.

26” LCD TV Polaroid TLM-22601B

6. TV Speaker: Choose to turn on / off the TV internal speaker. The digital audio output signals、earphone output

signals will not be turn-off even though the TV speaker is off. The default setting is on.

7. Settings: Restore the default audio settings.

FEATURE MENU

The Feature menu in TV mode shows as below. It provides certain optional control functions such as time set, sleep

timer, advanced video menu, Password Set, parental control (V-chip) and Digital closed caption setting. 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.

1. Time Set: Set the current time. This sub-menu includes Time Set Mode, Time Zone and Time items. 【Time Set

Mode】user can choose Auto or Manual,【Time Zone】item provides user to set current time zone, such as:

Pacific, Alaska, Hawaii, Eastern, Central and Mountain. 【Time 】item provides user to set the time clock.

2. 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.

3. Advanced Video Menu: Provide the Noise Reduction、Color Temperature and 3D Y/C. Dynamic Contrast options

for enhancing video quality.

【Noise Reduction】gives four NR effect degrees, such as: Low, Mid, High and Off. The default setting is Mid.

【Colour Temp】gives three color temperature modes as: Normal、Warm and Cool.

【3D Y/C】provides On / Off switches. The default setting is On.

【 Dynamic Contrast】user can choose 0n or Off.

【Setting】restores the default advanced video option settings.

26” LCD TV Polaroid TLM-22601B

4. Password Set: Change the 4-numeral parental control password. Three steps are required for changing the

password: Enter Old Password -> Enter New Password -> Confirm New Password. Note: This item is only available

in TV, Composite and S-Video source modes. The default password is 『0 0 0 0』.

5. Parental Control: provide the parental Control (V-chip) function setting. Before entering the Parental Control

sub-menu, user has to key in the password first. Then enter the Parental Lock item, User can modify the restricted

table about MPAA or TV Rating respectively. While exiting the sub-menu, the parental control function is working.

The inhibitive channels or source signals can be un-lock through pressing the V-CHIP key on the remote control and

then key in the correct password. Note: This feature is only available in TV, Composite and S-Video source modes.

(The default password is: 0 0 0 0.)

26” LCD TV Polaroid TLM-22601B

6. Digital Captions: Select the close caption options (Service 1-6, Text 1-4 and CC 1-4) in digital TV mode. When

select service 1 to service 6, you can modulate parameters in the Digital Close Caption.

7. Digital Close Caption: Provide numerous options for setting the digital close caption style. In the sub-menu

【Style】item can be set as Automatic or Custom mode. If Custom mode is selected, user can modify the detail

styles described below. The setting result will be shown immediately on the bottom side of the sub-menu OSD.

Note: This feature is only available in Digital TV (ATSC) mode.

【Size】: Digital close caption font size, which can be set as Small、Normal or Large.

【Font】: Digital close caption font style, which can be chosen as Default or Font 1 ~ 7.

【Text Color】: Giving Red / Green / Blue/ Yellow / Magenta / Cyan / Black / White Colors.

【Text Opacity 】: Giving Transparent / Translucent / Solid / Flashing modes.

【Background Color】: Giving Red / Green / Blue / Yellow / Magenta / Cyan / Black / White Colors.

【Background Opacity 】: Giving Transparent / Translucent / Solid /Flashing modes.

【Edge Effect 】: The text edge effects, which gives None / Raised /Depressed / Uniform / Left Shadow / Right

Shadow modes.

【Edge Color】: The colors of text edge effects, which provides Red /Green / Blue / Yellow / Magenta / Cyan / Black

/ White Colors.

8. Component Set: This option only shows and is available in component mode, which provides fine tuning

component display, such as: 【H-Position】、【V-Position】, 【Clock】and【Phase】(Auto Adjust function is not supported

under Component mode). All these items are giving the tuning range from 0 to 100.【Setting】item provides the

default component setting values restoring.

9. 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】, 【Phase】, and【Auto Adjust】.All these items giving

the tuning range from 0 to 100. 【Setting】item provides the default VGA setting values restoring.

26” LCD TV Polaroid TLM-22601B

2.3 How to Connect

26” LCD TV Polaroid TLM-22601B

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. RGB PC – Connect the video and audio cables from a computer here.

3. AV/S-VIDEO IN – Connect the primary source for composite video devices, such as a VCR or video game.

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).

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. DTV – Connect to an antenna or digital cable (out-of-the-wall, not from Cable Box) for Digital TV.*

6. SPDIF (Optical Digital Audio Out) - When a digital audio signal is associated with the input selected for

viewing, the digital audio will be available on this SPDIF connection to your home theater system.

Once your equipment is connected, use the following procedure to view the input signal:

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.)

26” LCD TV Polaroid TLM-22601B

2.4 Front Panel Control Knobs

1 VOL +

2 VOL -

3 CH ▲

4 CH ▼

5 MENU

6 INPUT

7 POWER

VOL +: Press to increase the sound volume level.

VOL - : Press to decrease the sound volume level.

CH +: Press to select the next higher channel

CH - : Press to select the next lower channel.

Menu key: Press to open or exit the OSD menu.

Source key: Press to select the input source.

Power key: Press to turn on / off (standby) the TV set. (Please re-turn on TV after the Power-ON status LED had changed to the Red color and finished flashing.)

26” LCD TV Polaroid TLM-22601B

3. Input/Output Specification

3.1 RGB Signal input

15 - Pin Color Display Signal Cable

Pin – Assignment of 15-pin D-sub: 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 Ground 14 V-Sync. 7 Green Ground 15 Serial Clock for DDC 8 Blue 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

26” LCD TV Polaroid TLM-22601B

3.3 AV/S-Video/Component Video Inputs

AV Signal Performance Video / S-Video / Component Video Input

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

Video1 (Composite Video input)

Amplitude 1.0 V(p-p), negative sync. Impedance 75 ohm terminated

Video2 (Y / C input)

(S-Video input)

System NTSC Y signal amplitude 1.0Vpp (including sync) C signal amplitude 0.286Vpp Impedance 75 ohm terminated

Video3 Component (Y, Pb/Cb, Pr/Cr input)

Y signal amplitude 1.0Vpp (including sync) Cr, (R-Y) / Cb, (B-Y)

System NTSC

System 1080i, 480p, 720p, 480i

±0.35Vpp, 75 ohm

Signal amplitude

75 ohm terminated

Impedance

Y = 0.299R + 0.587G + 0.114B (R-Y)= 0.701R + 0.587G + 0.114B (B-Y)=0.299R + 0.587G + 0.886B

3.4 Compatible Mode Table

Horizontal Vertical

Mode Resolution Total

640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175

VGA

SVGA

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

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 46.875 P 75 P 49.5

1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000

VESA MODES

Nominal

Frequency

(KHz)

Sync

Polarity

Nominal

Freq.

(Hz)

Sync

Polari

Nominal

Pixel

Clock

(MHz)

XGA

WXGA 1360x768@60Hz 1792x795 47.712 P 60.015 P 85.5

1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000

1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750

26” LCD TV Polaroid TLM-22601B

4. Mechanical Instructions

1. Remove the 3 screws to remove the base.

2. Remove 11 screws to remove the rear cover.

3. Remove the screws to remove the BKT-vesa.

26” LCD TV Polaroid TLM-22601B

4. Release the connectors.

5. Remove the speakers.

26” LCD TV Polaroid TLM-22601B

6. Remove the main board, power board

7. Remove the BKT-PCB-holder.

8. Release the key board and IR board.

26” LCD TV Polaroid TLM-22601B

9. Remove the BKT-panel-support.

10. Remove the bezel.

11. Remove the 4 screws to release the panel.

26” LCD TV Polaroid TLM-22601B

5. Repair Flow Chart

5.1. No Power (No LED indicator)

Check power cord and board interface

Check F901, BD901, C910

Check D902, C920

Check T901

Check D950, C952, C954

5.2. Can not start (LED indicator yellow)

Check key board

Repair the key board

Replace F901 or BD901 or C910

Replace D902 or C920

Replace T901

Plug in power cord and interface

Replace D950 or C952 or C954

Check 5V SB

Check 3.3V SB

Check PWR ON signal

Check main board power supply part

Check U401, U402

Check I2C communication

Return to “1”

Check U706

Check U409, Q706

Check I2C communication

Replace the main board

Replace U409 or Q706

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