Service Manual
ViewSonic VT2645-M
Model No. VS12675
26” LCD TV
(VT2645-M_SM Rev. 1b Apr. 2010)
ViewSonic® 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright© 2010 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes.
Trademarks
Optiquest is a registered trademark of ViewSonic Corporation. ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Revision |
SM Editing Date |
ECR Number |
Description of Changes |
Editor |
1a |
12/22/09 |
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Initial Release |
Sophia Kao |
1b |
04/06/10 |
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Add Factory & Hospitality mode |
Sophia Kao |
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UTABLE OF CONTENTS
Item |
Page |
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1. |
Precautions and Safety Notices |
3 |
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2. |
Product Specification |
6 |
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3. |
Function Description |
10 |
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4. |
Block Diagram |
16 |
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5. |
Exploded Diagram and Exploded Parts List |
17 |
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6. |
Disassembly Procedure |
20 |
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7. |
Recommended Spare Parts List |
33 |
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8. |
BIOS /Firmware Update SOP |
34 |
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9. |
Trouble Shooting Flow Chart |
57 |
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10. |
FAQ |
61 |
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Safety Instructions
The symbol is intended to alert the user to presence of un-insulated “Hazardous Voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
This symbol is intended to alert the user that improper use of the product may result in product malfunction. The user should pay attention to avoid accidents or unnecessary problems.
Wet Location
Apparatus shall not be exposed to dripping or splashing and that no objects filled with liquids, such as vases, shall be placed on the apparatus.
Outdoor Use
WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
Disconnect Device - The Mains Plug or An Appliance Coupler
The mains plug or an appliance coupler is used as the disconnect device for disconnection from the mains, the disconnect device shall remain readily operable.
Safety
Operate the TV on 100V and 120V AC only.
Use the AC power cord specified by ViewSonic and suitable for the voltage where you use it.
The plug is designed, for safety purposes, to fit into the wall outlet only one way. If you are unable to insert the plug fully into the outlet, contact your dealer.
If any liquid or solid object should fall inside the cabinet, stop operating, unplug the TV immediately and have it checked by qualified service technician.
If you will not be using the TV for a long time, disconnect the power by pulling the plug itself. Do not pull on the cord.
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Carrying The TV
To prevent dropping the TV and causing serious injury, you must follow these guidelines:
Disconnect all cables before carrying the TV.
Carrying the large size TV requires at least two or three people.
When you carry the TV, place your hands as illustrated and hold it securely. Do not put stress on the LCD panel and the frame around the screen.
When carrying the TV, do not subject it to shocks, vibration, or excessive force. When lifting or moving the TV, hold it securely from the bottom. Place your palm directly under the panel.
Installed on the wall
Installed with stand
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Leave at least this space around the set. Do not install the TV set as follows: Air circulation is blocked.
Broken pieces
Do not throw anything at the TV.
Doing so may break the screen glass and cause serious injury.
If the surface of the TV cracks, unplug the AC power cord before touching the TV. Otherwise electric shock may result.
Handling of broken glass and liquid crystal leakage
If the LCD panel gets damaged, crystalline liquid leakage may occur, or scattered broken glass may result.
Do not touch broken glass or crystalline liquid which is toxic, with bare hands as cuts, poisoning or skin irritation may occur.
Also do not glass fragments or leaked crystalline liquid get into your eyes or mouth. Should either contacted your eyes or mouth, rinse the contacted area thoroughly with water and consult your doctor.
Note
This television includes a QAM demodulator, which should allow you to receive unscrambled digital cable television programming via subscription service to a cable service provider.
The type of programming and signal provided by your cable service provider will affect the availability of digital cable television programming in your area.
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2.1 Specification
Dimensions (with stand) |
657.7mm x 506.5mm x 220mm |
Physical(W)x(H)x(D) |
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Weight |
7.3 kg |
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LCD |
26” TFT Active Matrix RGB |
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Pixel Pitch |
0.1405 (H) x 0.4215 (V) mm |
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Native Resolution |
1366 x 768 |
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Display area |
575.769mm (H) x 323.712mm (V) |
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Speaker Output |
5W x 2 |
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Warning: Do not set the graphics card in your computer to exceed these refresh rates; doing so may result in permanent damage to the LCD TV.
2.2 Front View
Item |
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Description |
1 |
Remote Control Receiver |
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Receives IR signals from the remote control. |
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2 |
Power LED Indicator |
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Lights up in blue when the TV is turned on. Lights up in orange when the TV |
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is in standby mode. |
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3 |
Power ON/OFF button |
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Turn the power on from standby mode or turn the power off to return to the |
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standby mode. |
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4 |
SOURCE |
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Select input source. |
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5 |
MENU |
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Turn OSD menu ON/OFF. |
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6Volume Up
7Volume Down
8CH Up
9CH Down
2.3Rear View
Increase sound volume or select a control while in OSD menu. Decrease sound volume or or select a control while in OSD menu.
Channel up when source is TV, or adjust a highlighted control while in OSD menu.
Channel down when source is TV, or adjust a highlighted control while in OSD menu.
Item |
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Description |
1 |
Power (AC input) |
Plug-in the supplied AC Power cord and connect to the AC input power |
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source (110~120V). |
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2 |
USB Service Port |
Service only. Not available for users. |
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3 |
HDMI 1 / 2 |
Connect this port to the HDMI/HDMI-DVI jack of the compatible equipment. |
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*If you use HDMI-DVI connections, please use PC Audio In for audio input. |
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4 |
PC Audio In |
Connect the PC Audio Out on your computer to the PC Audio In on the rear |
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of the LCD TV. |
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5 |
VGA Signal Input |
Connect a 15-pin D-sub RGB cable to the RGB output of your computer |
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and the other end to the RGB input on the rear of the LCD TV. |
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6 |
R/L Audio Inputs (YPbPr) |
Connect to an external device, such as a VCR, STB, or a DVD player. |
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7 |
YPbPr |
Connect to an external device, such as a VCR, STB, or a DVD player. |
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8 |
Coaxial |
Connect to a digital audio receiver supporting the S/PDIF standard, such as |
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a home theater receiver. |
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S-Video Input |
Connect to an external device, such as a VCR, STB, or a DVD player. |
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10 |
AV |
Connect to an external device, such as a VCR, STB, or a DVD player. |
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11 |
R/L Audio Input (AV/S-Video) |
Connect to an external device, such as a VCR, STB, or a DVD player. |
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12 |
TV Cable/Antenna |
Connect to a cable or antenna TV. |
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2.4 Remote Control
Button |
Description |
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1 |
POWER |
Press this button to turn the power on from standby mode. Press it again to |
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return to the standby mode. |
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2 |
FAV 1-3 |
Press to select favorite channels |
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3 |
TV |
Press to direct to TV source when in any other source. |
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4 |
HDMI |
Press to select source to HDMI or VGA mode. |
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5 |
YPbPr |
Press to select source to YPbPr mode. |
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6 |
AV |
Press to select source to AV or S-Video mode. |
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7 |
CC |
Press to turn Closed Caption On/Off |
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8 |
MTS |
Press to activate Multichannel Television Sound, Stereo or Mono. |
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90~9, - number buttons
10LAST
11INFO
12CH
13+VOL-
14MUTE
15SOURCE
16EXIT
17
18ENTER
19GUIDE
20MENU
21SLEEP
22PICTURE
23WIDE
24SOUND
Press 0~9 and “-” to select a channel.
After you input the channel numbers, press ENTER button to direct to the channel immediately, or wait for 3 seconds to change automatically. Press to return to previous channel.
Press this button to display the current state of the LCD TV. Press to change the channels up or down.
Press to adjust the volume.
Press to turn off the sound. To restore the sound, press this button again, or press the VOL+ / VOLbutton.
Press to display the INPUT source list and select the source with /
buttons. To confirm the selection, press ENTER.
Press the button to exit the present menu.
Press these buttons to navigate the OSD menus.
/
is for function select, and
is for function adjustment.
Press to confirm the selection in the OSD menu, or to enter the OSD menu you select.
Pressing ENTER after you input channel numbers will change channels immediately.
Press to display the Electronic Program Guide (EPG).
It contains the program information for the channel you’re watching. Press to turn the OSD (On-Screen Display) menu on.
Press repeatedly to set the off timer.
The function is used to automatically shut off the LCD TV after a preset period of time passed. There are several times for choice – Off, 15 Min, 30 Min, 45 Min, 60 Min, 75 Min, 90 Min, 105 Min, and 120 Min.
Press to adjust Picture mode.
Press to select Video Display format. Press to adjust Sound mode.
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3.1 Using the OSD Menu
3.1.1Press POWER to to turn the LCD TV on.
3.1.2Press MENU on the remote control to display the Main menu.
3.1.3Use to highlight an OSD Menu and press ENTER to enter the OSD Menu.
3.1.4Use to highlight an individual OSD option, then use
to change the setting.
3.1.5Press ENTER to enter next OSD layer, use to change the setting, then press ENTER to confirm.
3.1.6Press MENU to exit the menu.
3.2 OSD Settings
3.2.1Video Settings
Brightness |
Controls the overall brightness of the picture. |
Contrast |
Controls the difference between the brightest and darkest |
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regions of the picture. |
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Video
Sharpness |
Increase this setting to see crisp edges in the picture; |
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decrease it for soft edges. |
Picture Mode |
Show room |
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Movie |
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Game |
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Sports |
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Custom |
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Controls the overall color of the picture. |
Color |
Tint |
Controls the difference between the green and red regions of |
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the picture. |
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Backlight |
Dark Room |
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Medium Room |
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Bright Room. |
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Color Temperature |
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Warm |
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Cool |
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Neutral |
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Resets all settings of Video. |
Memory Recall |
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3.2.2 Audio Settings
Audio |
Bass |
Controls the relative intensity of lower-pitched sounds. |
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Controls the relative intensity of higher pitched sounds. |
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Treble |
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Balance |
Adjusts the relative volume of the speakers in a multiple speaker |
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system. |
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TV Speaker |
OFF |
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ON |
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Audio mode |
Rock |
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POP |
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Classical |
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Flat |
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Audio Only |
Turns off video and gives out audio only. Press any key to show |
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video. |
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Resets all settings of Audio. |
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Memory Recall |
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3.2.3 Screen Settings
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No Scale |
Displays the 1:1 size of the original content. |
View Mode |
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Normal |
Keeps the source display ratio. If the original input content is 4:3, then |
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shows 4:3. If the original input content is 16:9, then shows 16:9. |
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Full |
Enlarges the standard 4:3 source video to the 16:9 full screen video. |
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When the source video is 16:9 in ratio, no change will occur. |
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Overscan |
Enlarges the original picture horizontally and vertically to an equal |
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aspect ratio that fills the screen. The redundant part of the upper, |
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bottom, left and right of the image will be removed. |
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3.2.4 TV Program Settings
TV Program |
Channel skip |
Channel Skip List |
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Clear List |
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Channel Name Edit |
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Channel Edit |
Channel Name Edit |
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Allows you to assign a name to a |
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channel. |
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MTS |
Mono |
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Mono |
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SAP |
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Audio Language |
English |
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French |
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Spanish |
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Auto Scan |
Cable |
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Air |
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Manual Add |
Channel Add |
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Enter |
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Add |
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Cancel |
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3.2.5 Setup Settings
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Date and Time |
Date. Allows the user to set the current time |
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Day of Week |
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Time Zone |
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Current Time |
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Adjust for Daylight Saving Time |
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Auto Calibration |
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Closed Captions |
Closed Captions |
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Analog Type |
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Digital Type |
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Font |
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Size |
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Font Color |
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Background Color |
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Setup Settings |
Parental Control |
Enter Password |
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Rating |
Select ON/OFF to |
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activate/deactivate the Rating programs. |
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Block Unrated |
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TV-Y (TV Rating) |
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MPAA (MPAA Rating) |
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en-C8 (Canada English Rating) |
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fr-8+ (Canada French Rating) |
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Channel Block |
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Change Password |
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OSD Timeout |
10 sec |
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20 sec |
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30 sec |
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OSD Language |
English |
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French |
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Spanish |
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Reset All |
Press ENTER to reset all settings and restore |
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defaults. |
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Version |
Press ENTER to view the current TV version. |
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3.2.6 How to get into the factory mode and Hospitality mode
Factory model: Enter OSD "Setting" -> "Version" -> press arrow UP + "-" + ENTER+ENTER Carnival (Hospitality) model: Pressing "Menu" and then "9876" key.
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orpCci n Sowei V |
M- 2645VT 17 opyCt o No D- alit n idefno C |
EXPLODED PARTS LIST ( VT2645-M )
ViewSonic Model Number: VS12675
Rev: 1A
Item |
ViewSonic P/N |
Ref. P/N |
Description |
Q'ty |
1 |
C-00009759 |
13EB-07B0201 |
B09 26 REAR COVER MO |
1 |
2 |
NA |
13EB-11B0211 |
EB11 26 BUTTON BEZEL MO |
1 |
3 |
C-00009758 |
13EB-11B0101 |
EB11 26 FRONT COVER MO |
1 |
4 |
C-00009761 |
13EB-11Q0301 |
EB11 26 STAND BASE |
1 |
5 |
HW-00008942 |
13EB-0EN0111 |
EB0E 26 CHASSIS R1.1 |
1 |
6 |
HW-00008939 |
13EB-0EN0201 |
B17 26 BRACKET1 R1.0 |
1 |
7 |
HW-00008940 |
13EB-0EN0411 |
EB0E 26 BRACKET2 R1.1 |
2 |
8 |
C-00009760 |
13EB-0EQ0711 |
EB0E 26 BASE SUPPORT R1.1 |
1 |
9 |
HW-00008941 |
13EB-0EN0501 |
B17 26 TERMINAL BRACKET R1.0 |
1 |
10 |
HW-00008943 |
131C-006B000 |
SCREW M3*8L*9D (X) W-NI #2 |
6 |
11 |
HW-00008944 |
131C-0040000 |
SCREW M3*8L (B) B-NI |
15 |
12 |
HW-00008946 |
131A-006C000 |
SCREW M4*6(K) W-NI #2 |
9 |
13 |
HW-00008947 |
131A-007C000 |
SCREW M3*6L (WS) W-ZN |
14 |
14 |
HW-00008948 |
131A-007G000 |
SCREW M4*6L (W) W-NI |
1 |
15 |
HW-00008949 |
131A-0082000 |
SCREW M3*8L (X) B-NI |
7 |
16 |
HW-00008950 |
131C-001G000 |
SCREW M3*10L (B) B-NI #2 |
8 |
17 |
HW-00008951 |
131C-003U000 |
SCREW M3*14L (B) B-NI #2 |
4 |
18 |
HW-00008952 |
131A-000P000 |
SCREW M4*15L (W) B-NI #2 |
4 |
19 |
NA |
13EB-0EL0223 |
EB0E 26 REAR LABEL |
1 |
20 |
M-00008405 |
13EB-03U0201 |
B05 RUBBER FOOT D=12.1 |
4 |
21 |
M-00008406 |
13EB-03U0301 |
B05 RUBBER FOOT D=20.6 |
6 |
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3
Cable
Power
8
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batteries |
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with |
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Remote |
control |
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4 |
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User |
Guide |
5 |
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6 |
9 |
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1
2
11
10
12
PACKING PART LIST ( VT2645-M )
ViewSonic Model Number: VS12675
Rev:
Item |
ViewSonic P/N |
Ref. P/N |
Description |
Q'ty |
1 |
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TV |
1 |
2 |
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STAND |
1 |
3 |
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Power Cable |
1 |
4 |
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Remote control |
1 |
5 |
DC-00009821 |
1506-09L9000 |
Quick Start Guide BAG |
1 |
6 |
DC-00009822 |
1506-09UF000 |
Quick Start Guide |
1 |
7 |
NA |
1506-0B5D000 |
User Guide |
1 |
8 |
P-00009734 |
1505-00YB000 |
EPS CUSHION VT3745-M(TR) |
1 |
9 |
P-00009735 |
1505-00YC000 |
EPS CUSHION VT3745-M(TL) |
1 |
10 |
P-00009736 |
1505-00YD000 |
EPS CUSHION VT3745-M(BR) |
1 |
11 |
P-00009737 |
1505-00YE000 |
EPS CUSHION VT3745-M(BL) |
1 |
12 |
NA |
1503-024V000 |
CARTON |
1 |
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