ViewSonic VT2645-M, VS12675 Schematic

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 - [phone]

Copyright

1

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 Initial Release Sophia Kao

1b 04/06/10 Add Factory & Hospitality mode Sophia Kao

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UTABLE OF CONTENTS

2

Item Page

1. Precautions and Safety Notices 3

2. Product Specification 6

3. Function Description 10

4. Block Diagram 16

5. Exploded Diagram and Exploded Parts List 17

6. Disassembly Procedure 20

7. Recommended Spare Parts List 33

8. BIOS /Firmware Update SOP 34

9. Trouble Shooting Flow Chart 57

10. FAQ 61

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1. Precautions and Safety Notices

3

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. Product Specification

2.1 Specification

Dimensions (with stand)
Physical(W)x(H)x(D)
Weight 7.3 kg
LCD 26” TFT Active Matrix RGB
Pixel Pitch 0.1405 (H) x 0.4215 (V) mm
Native Resolution 1366 x 768
Display area 575.769mm (H) x 323.712mm (V)
Speaker Output 5W x 2

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

657.7mm x 506.5mm x 220mm

Item Description

1 Remote Control Receiver Receives IR signals from the remote control.
2 Power LED Indicator Lights up in blue when the TV is turned on. Lights up in orange when the TV

is in standby mode.

3 Power ON/OFF button Turn the power on from standby mode or turn the power off to return to the

standby mode.
4 SOURCE Select input source.
5 MENU Turn OSD menu ON/OFF.

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6 Volume Up Increase sound volume or select a control while in OSD menu.

7

7 Volume Down Decrease sound volume or or select a control while in OSD menu.
8 CH Up Channel up when source is TV, or adjust a highlighted control while in OSD

menu.
9 CH Down Channel down when source is TV, or adjust a highlighted control while in

OSD menu.

2.3 Rear View

Item Description

1 Power (AC input) Plug-in the supplied AC Power cord and connect to the AC input power

source (110~120V).
2 USB Service Port Service only. Not available for users.
3 HDMI 1 / 2 Connect this port to the HDMI/HDMI-DVI jack of the compatible equipment.

*If you use HDMI-DVI connections, please use PC Audio In for audio input.
4 PC Audio In Connect the PC Audio Out on your computer to the PC Audio In on the rear

of the LCD TV.
5 VGA Signal Input Connect a 15-pin D-sub RGB cable to the RGB output of your computer

and the other end to the RGB input on the rear of the LCD TV.
6 R/L Audio Inputs (YPbPr) Connect to an external device, such as a VCR, STB, or a DVD player.
7 YPbPr Connect to an external device, such as a VCR, STB, or a DVD player.
8 Coaxial Connect to a digital audio receiver supporting the S/PDIF standard, such as

a home theater receiver.

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9 S-Video Input Connect to an external device, such as a VCR, STB, or a DVD player.

8

10 AV Connect to an external device, such as a VCR, STB, or a DVD player.
11 R/L Audio Input (AV/S-Video) Connect to an external device, such as a VCR, STB, or a DVD player.
12 TV Cable/Antenna Connect to a cable or antenna TV.

2.4 Remote Control

Button Description

1 POWER Press this button to turn the power on from standby mode. Press it again to

return to the standby mode.
2 FAV 1-3 Press to select favorite channels
3 TV Press to direct to TV source when in any other source.
4 HDMI Press to select source to HDMI or VGA mode.
5 YPbPr Press to select source to YPbPr mode.
6 AV Press to select source to AV or S-Video mode.
7 CC Press to turn Closed Caption On/Off
8 MTS Press to activate Multichannel Television Sound, Stereo or Mono.

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9 0~9, - number buttons Press 0~9 and “-” to select a channel.

9

After you input the channel numbers, press ENTER button to direct to the

channel immediately, or wait for 3 seconds to change automatically.
10 LAST Press to return to previous channel.
11 INFO Press this button to display the current state of the LCD TV.

12 CH
13 +VOL- Press to adjust the volume.

14 MUTE Press to turn off the sound. To restore the sound, press this button again, or

15 SOURCE

16 EXIT Press the button to exit the present menu.

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18 ENTER Press to confirm the selection in the OSD menu, or to enter the OSD menu you

19 GUIDE Press to display the Electronic Program Guide (EPG).

Press to change the channels up or down.

press the VOL+ / VOL- button.

Press to display the INPUT source list and select the source with

To confirm the selection, press ENTER.

Press these buttons to navigate the OSD menus.

/ is for function select, and is for function adjustment.

select.

Pressing ENTER after you input channel numbers will change channels

immediately.

It contains the program information for the channel you’re watching.

/ buttons.

20 MENU Press to turn the OSD (On-Screen Display) menu on.
21 SLEEP 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.
22 PICTURE Press to adjust Picture mode.
23 WIDE Press to select Video Display format.
24 SOUND Press to adjust Sound mode.

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3. Function Description

3.1 Using the OSD Menu

3.1.1 Press POWER to to turn the LCD TV on.

3.1.2 Press MENU on the remote control to display the Main menu.

3.1.3 Use

3.1.4 Use
setting.

3.1.5 Press ENTER to enter next OSD layer, use to change the setting, then
press ENTER to confirm.

to highlight an OSD Menu and press ENTER to enter the OSD Menu.

to highlight an individual OSD option, then use to change the

3.1.6 Press MENU to exit the menu.

3.2 OSD Settings

3.2.1Video Settings

Brightness

Contrast Controls the difference between the brightest and darkest

Controls the overall brightness of the picture.

regions of the picture.

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Video

Sharpness

Picture Mode

Color

Tint

Increase this setting to see crisp edges in the picture;
decrease it for soft edges.

Show room
Movie
Game
Sports
Custom
Controls the overall color of the picture.

Controls the difference between the green and red regions of
the picture.

Backlight

Color Temperature

Memory Recall

Dark Room
Medium Room
Bright Room.

Warm

Cool

Neutral
Resets all settings of Video.

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3.2.2 Audio Settings

Audio

Bass

Controls the relative intensity of lower-pitched sounds.

Treble

Balance

Audio mode

Controls the relative intensity of higher pitched sounds.

Adjusts the relative volume of the speakers in a multiple speaker
system.

OFF TV Speaker

ON

Rock
POP
Classical
Flat

Audio Only

Memory Recall

Turns off video and gives out audio only. Press any key to show
video.

Resets all settings of Audio.

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3.2.3 Screen Settings

No Scale Displays the 1:1 size of the original content.

View Mode

3.2.4 TV Program Settings

Normal Keeps the source display ratio. If the original input content is 4:3, then

shows 4:3. If the original input content is 16:9, then shows 16:9.

Full Enlarges the standard 4:3 source video to the 16:9 full screen video.

Overscan Enlarges the original picture horizontally and vertically to an equal

TV Program

When the source video is 16:9 in ratio, no change will occur.

aspect ratio that fills the screen. The redundant part of the upper,
bottom, left and right of the image will be removed.

Channel skip

Channel Skip List
Clear List

Channel Edit

Audio Language

Auto Scan

MTS

Channel Name Edit

Channel Name Edit
Allows you to assign a name to a
channel.

Mono
Mono
SAP

English
French
Spanish

Cable
Air

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3.2.5 Setup Settings

Setup Settings

Manual Add

Date and Time

Closed Captions

Parental Control

Channel Add
Enter
Add
Cancel

Date. Allows the user to set the current time
Day of Week
Time Zone
Current Time
Adjust for Daylight Saving Time
Auto Calibration
Closed Captions
Analog Type
Digital Type
Font
Size
Font Color
Background Color
Enter Password

Rating Select ON/OFF to
activate/deactivate the Rating programs.

Block Unrated

TV-Y (TV Rating)

MPAA (MPAA Rating)

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OSD Timeout

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OSD Language

en-C8 (Canada English Rating)

fr-8+ (Canada French Rating)

Channel Block

Change Password
10 sec

20 sec
30 sec

English
French
Spanish

Reset All

Version

3.2.6 How to get into the factory mode and Hospitality mode

Press ENTER to reset all settings and restore
defaults.

Press ENTER to view the current TV version.

Factory model: Enter OSD "Setting" -> "Version" -> press arrow UP + "-" + ENTER+ENTER

Carnival (Hospitality) model: Pressing "Menu" and then "9876" key.

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4. Block Diagram

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5. Exploded Diagram and Exploded Parts List

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EXPLODED PARTS LIST ( VT2645-M )

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ViewSonic Model Number: VS12675
Rev: 1A

Item ViewSonic P/N Ref. P/N Description Q'ty

1
2 NA 13EB-11B0211 EB11 26 BUTTON BEZEL MO 1
3
4 C-00009761 13EB-11Q0301 EB11 26 STAND BASE 1
5
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
10 HW-00008943 131C-006B000 SCREW M3*8L*9D (X) W-NI #2 6
11
12
13
14
15
16
17
18
19 NA 13EB-0EL0223 EB0E 26 REAR LABEL 1
20
21

C-00009759

C-00009758

HW-00008942

HW-00008941

HW-00008944
HW-00008946
HW-00008947
HW-00008948
HW-00008949
HW-00008950
HW-00008951
HW-00008952

M-00008405
M-00008406

13EB-07B0201 B09 26 REAR COVER MO 1

13EB-11B0101 EB11 26 FRONT COVER MO 1

13EB-0EN0111 EB0E 26 CHASSIS R1.1 1

13EB-0EN0501 B17 26 TERMINAL BRACKET R1.0 1

131C-0040000 SCREW M3*8L (B) B-NI 15
131A-006C000 SCREW M4*6(K) W-NI #2 9
131A-007C000 SCREW M3*6L (WS) W-ZN 14
131A-007G000 SCREW M4*6L (W) W-NI 1
131A-0082000 SCREW M3*8L (X) B-NI 7
131C-001G000 SCREW M3*10L (B) B-NI #2 8
131C-003U000 SCREW M3*14L (B) B-NI #2 4
131A-000P000 SCREW M4*15L (W) B-NI #2 4

13EB-03U0201 B05 RUBBER FOOT D=12.1 4
13EB-03U0301 B05 RUBBER FOOT D=20.6 6

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3

19

Power Cable

8

Remote control with batteries

5

User Guide

6

7

4

9

1

2

10

11

12

PACKING PART LIST ( VT2645-M )

ViewSonic Model Number: VS12675
Rev:

Item ViewSonic P/N Ref. P/N Description Q'ty

1TV1
2 STAND 1
3 Power Cable 1
4 Remote control 1
5

DC-00009821

6

DC-00009822

7 NA 1506-0B5D000 User Guide 1

P-00009734

8

P-00009735

9
10 P-00009736 1505-00YD000 EPS CUSHION VT3745-M(BR) 1
11

P-00009737

12 NA 1503-024V000 CARTON 1

1506-09L9000 Quick Start Guide BAG 1

1506-09UF000 Quick Start Guide 1

1505-00YB000 EPS CUSHION VT3745-M(TR) 1
1505-00YC000 EPS CUSHION VT3745-M(TL) 1

1505-00YE000 EPS CUSHION VT3745-M(BL) 1

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6. Disassembly Procedure

Please follow the information provided in this section to perform the complete
disassembly procedure of the LCD panel. Be sure to use proper tools described
below.
LCD consists of various Parts. This chapter describes the procedures for the
complete parts disassembly. In addition, in between procedures, the detailed
disassembly procedure of individual parts will be provided for your service needs.

The disassembly procedure consists of the following steps:

 Base
 Rear Cover
 Bracket
 Keypad
 Cable
 Mainboard
 PSU
 IR Board
 Speaker
 Panel

Base

1. Remove 4 screws (M4*15L W) that fixing the base with the rear cover.

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2. Remove screw (M4*10L S) to take the base module apart.

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BASE SUPPORT

BASE

Rear Cover

1. Remove 2 screws (M3*10L B) and 5 screws (M3*8L X) that fixing on the rear cover.

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2. Remove 4 screws (M3*10L B) that fixing on the rear cover.

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3. Remove 4 screws (M3*14L B) that fixing on the rear cover.

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4. Remove the rear cover.

Bracket

1. Remove 2 screws (M3*10L B), 2 screws (M3*8L X) and 4 screws (M3*8L B) that
fixing on the I/O bracket.

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2. Remove 2 screws (M3*6L WS) that fixing the I/O bracket with the panel.

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3. Remove 4 screws (M3*6L WS) that fixing the left and right bracket cable clamps.

4. Remove 7 screws (M4*6 K) that fixing the bracket and chassis.

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5. Remove 4 screws (M3*8L) that fixing on the chassis.

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6. Remove 2 screws (M4*8LX) that fixing the chassis with the panel.

7. Remove the chassis.

Keypad

1. Remove 2 screws (M3*8L B) that fixing the keypad module with front cover module.

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2. Disconnect IR-Keypad wire from keypad.

3. Remove 3 screws (M3*8L B) to take the keypad module apart.

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4. Disconnect Keypad-MB wire from Keypad.

Cable

1. Disconnect Keypad-MB wire from mainboard.

2. Disconnect the PSU-MB cable.

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3. Disconnect speaker cable

4. Disconnect the LVDS cable from panel.

5. Open the cover of the LVDS connector on the Mainboard.

6. Insert the LVDS cable.

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7. Close the cover of the LVDS connector.

Mainboard

Remove 4 screws (M3*6L WS) that fixing on the Mainboard.

PSU

1. Remove screw (M4*6L W) that fixing the grounding wire with panel.

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2. Disconnect cables from PSU

3. Remove 4 screws (M3*6L WS) that fixing the PSU.

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IR Board

1. Disconnect the IR wire from IR board.

2. Remove 2 screws (M3*8L B) that fixing the IR board.

Speaker

Remove 4 screws (M3*8L*9D) that fixing the speakers on front cover.

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Panel

1. Remove 2screws (M3*8L*9D X) that fixing the panel

2. Remove the panel from front cover.

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Recommended Spare Parts List

7.

ViewSonic Model Number: VS12675

RECOMMENDED SPARE PARTS LIST (VT2645-M)

Rev:1a
Serial No. Prefix: REG

Item Category Part Name Description ECR/ECN ViewSonic P/N Ref. P/N Ref. NO Compatibility Location Universal number#

1 Remote Controlle

Accessories: [Adapter,

2 Power Cor

Remote Controller, Power

3 Batter

, External Cables]

Cord

4 Main Board VT2645-M MAIN BD./VS

PC Board Assembly: [All

5

PCBA]

6
7 Button Bezel EB11 26 BUTTON BEZEL MO

Cabinets:

8 Front Cove

[Front Bezel, All Covers,

9 Back Cove

Base Assembly]

10
11
12 Flat Cable FFC CABLE 30P P:1.0mm L:230mm

Cables: [All internal

13 wire POWER CABLE 13P TO 15P L:180m

Cables/wires]

14 wire POWER CABLE 7P TO 14P L:100mm
15 wire W.H CABLE 8P TO 8P,L:530mm
16 wire W.H CABLE 8P TO 8P,L:530mm
17 wire W.H CABLE 5P TO 5P,L:430mm
18 wire W.H CABLE 5P TO 5P,L:430mm
19

Documentation: [Quick

20

Start Guide, CD Rom;

21 User's Guide (CD ROM) UM ML VIEW SONIC

Label]

22
23
24
25
26
27

Electronic

28

Components:[LCD TV

29

Panel, Speaker]

30
31
32 Bracke

Hardware: [Screw,

33 Bracke

Bracket, Hinge]

34 Bracke
35 CHASSIS EB0E 26 CHASSIS R1.1
36 Screw SCREW M3*8L*9D (X) W-NI #2
37 Screw SCREW M3*8L (B) B-NI
38 Screw SCREW M4*8L(X) B-NI
39 Screw SCREW M4*6(K) W-NI #2
40 Screw SCREW M3*6L (WS) W-ZN
41 Screw SCREW M4*6L (W) W-NI
42 Screw SCREW M3*8L (X) B-NI
43 Screw SCREW M3*10L (B) B-NI #2
44 Screw SCREW M3*14L (B) B-NI #2
45 Screw SCREW M4*15L (W) B-NI #2
46 clip B17 BRACKET1 CABLE CLAMP

Miscellaneous: [Switch,

47 clip B17 BRACKET2 CABLE CLAMP

Fan, Rubber Foot, Logo]

48
49
50
51
52 Carton CARTON VT2645-M

Packing Material: [Box,

53 Cushion EPS CUSHION VT2645-M (TR)

Foam, Bags]

54 Cushion EPS CUSHION VT2645-M (TL)
55 Cushion EPS CUSHION VT2645-M (BR)
56 Cushion EPS CUSHION VT2645-M (BL)
57 Plastic Bag PET COVER EQ2688
58 Plastic Bag PE BAG STAND WDE-US-26F
59 Plastic Bag EPE BAG WDE-US-26
60 Plastic Bag ZIP BAG FOR VIEWSONIC

Ke

y Pad

IR Boar

Base Assembl
Stand Assembl

Qucik Start Guide
Qucik Start Guide

Label / Sticke
Label / Sticke
Label / Sticke
Label / Sticke
Label / Sticke
Panel
Panel
S

peaker
Power Su
Power Su

Foo

t

Foo

t

Foo

t

Ta

pe

Above listed items are examples, supplier can expand the rows to add more necessary items.

Remark 1:
Remark 2:

All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic Corporation. This is to eliminate repeated cross checks of

Notice: 1. For some special parts, some photos for identification purpose may be asked by reques

2. For all internal cables, there must be some wordings on the "Description" column about where the cable is used (connecting to which two parts)

3. All internal cables/wires should be put in the "Cables" categor

4. All external cables should be put in the "Accessories" category

5. Parts relationship (Main/Second source or 1/2/3/4) should be added in the "Compatibility" column

6. If any part for certain product isn't listed in the form, supplier/PE can add it themselves and keep the part name unified.

r REMOTE CONTROL VIEWSONIC

d AC POW.CORD UL/CSA/3P/3C,BLK

y R03P UM-4 AAA BATTERY

VT2645-M KEYPAD BD./VS

d

r EB11 26 FRONT COVER MO

r B09 26 REAR COVER MO

y

y

r
r
r
r
r

pply

pply
t B17 26 BRACKET1 R1.0
t EB0E 26 BRACKET2 R1.1
t B17 26 TERMINAL BRACKET R1.0

VT3745-M IR BD./VS

EB0E 26 BASE SUPPORT R1.1
EB11 26 STAND BASE

QUICK START GUIDE ENG VT2645-M

(QSG)

QUICK START GUIDE FRA VT2645-M

(QSG)

EB0E 26 REAR LABLE
SERIAL LABEL VIEWSONIC
ENERGY STAR LABEL 11*11mm R1.0
RATING LABEL VT2645-M
UPC LABEL VT2645-M
LCD TFT 26.0' WXGA HD 4U-CCFL
LCD TFT 26.0' WXGA HD 4U-CCFL
SPEAKER WDE26F 5W 120X25X30mm
POWER OPENFRAME 75W/+5,12,24V
POWER OPENFRAME 75W/+5,12,24V

B05 RUBBER FOOT D=12.1
B05 RUBBER FOOT D=20.6
LAYER PAD EQ2688
TAPE

y

A-00008537
A-00008538
A-00008539
B-00009808
B-00009809
B-00009810
C-00009757
C-00009758
C-00009759
C-00009760
C-00009761

t

CB-00009126
CB-00009127
CB-00009128
CB-00009129
CB-00009130
CB-00009131
CB-00009132
DC-00009821
DC-00009822
DC-00009823
DC-00009824
DC-00009825
DC-00009826
DC-00009827
DC-00009828
E-00009606
E-00009607
E-00009608
E-00009609
E-00009610
HW-00008939
HW-00008940
HW-00008941
HW-00008942
HW-00008943
HW-00008944
HW-00008945
HW-00008946
HW-00008947
HW-00008948
HW-00008949
HW-00008950
HW-00008951
HW-00008952
M-00008403
M-00008404
M-00008405
M-00008406
M-00008407
M-00008408
P-00009733
P-00009734
P-00009735
P-00009736
P-00009737
P-00009738
P-00009739
P-00009740
P-00009365

m

04AD-007W0VO
1411-0018000
0B09-0007000
69EB2UM10A01P
69EB2UK10A01P
69EB2VR10A01P
13EB-11B0201
13EB-11B0101
13EB-07B0201
13EB-0EQ0711
13EB-11Q0301
1412-00E7000 M
1414-016D000 M
1414-01SB000 M
1414-01GJ000 M
1414-016Q000 S
1414-01GK000 M
1414-016P000 S
1506-09L9000 M
1506-09UF000 M
1506-09L6000 M
13EB-0EL0203 M
1510-0AFG000 M
1510-01PK000 M
1510-0A4W000 M
1510-0AHK000 M
1823-00K70VO M
1823-00K7000 S
04A4-00DY000 M
0433-000H000 M
0433-000E000 S
13EB-0EN0201 M
13EB-0EN0411 M
13EB-0EN0501 M
13EB-0EN0111
131C-006B000 M
131C-0040000 M
131A-0088000 M
131A-006C000 M
131A-007C000 M
131A-007G000 M
131A-0082000 M
131C-001G000 M
131C-003U000 M
131A-000P000 M
13EB-0EQ0501 M
13EB-0EQ0601 M
13EB-03U0201 M
13EB-03U0301 M
1524-00K9000 M
13EB-0DU0A01 M
1503-01DE000 M
1505-00YB000 M
1505-00YC000 M
1505-00YD000 M
1505-00YE000 M
1516-00HU000 M
1516-00D5000 M
1516-007A000 M
1517-000Q000 M

M
M
M
M
M
M
M
M
M
M
M

M

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8. BIOS /Firmware Update SOP

8.1 How to upgrade HDTV firmware
Step1: Prepare a USB flash disk, a PC and the target HDTV

`

Step2: Use PC to obtain FIRMWARE.PKG from WebService.
Put “FIRMWARE.PKG” file onto “C:\Temp”.

Step3: Plug USB flash disk to PC.
Select USB disk in “My Computer”.
Select “Properties” item below to see USB file system format.

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Make sure FAT32 format in USB

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Copy “C:\Temp\FIRMWARE.PKG” to the ROOT directory of USB disk.

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Step4: Plug USB disk to HDTV
Un-plug USB disk from PC
Plug the USB disk to the HDTV (power off)

Step5: Power on HDTV
Power on HDTV.
It will show upgrading progresses automatically within 3 seconds.
The HDTV screen will show red and blue progress bar several times.

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37

Step6: Power off automatically when finished
Remove the USB flash disk from HDTV.

8.2 How to format to FAT32

Plug USB flash disk to PC.
In “My Computer” folder, Select “Format…” function in the pop-up menu.

Select FAT32, then press “Start”.

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8.3 Supported USB flash disks

SanDisk
Kingston
KingMax

8.4 RMA test procedure

Install factory tool

8.4.1 Install visa450runtime

8.4.2 Finish Install.

8.4.3 Connect the USB cable between PC and PWR meter

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8.4.4 Restart the PC, the device can be found on the control panel.

8.4.5 Install the factory tool for repair.

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Finish installing under installation guide.

40

8.4.6 Run the factory tool.

8.4.7 When Login every initial screen, it should key in the user name and ISN number.
Key in the job number、password, and log in.

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Input serial number of TV.

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8.4.8 Test1 station, Initialize

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connect the USB to RS232 cable+RS232 cable on TV.

Connect the other end of the RS232 cable with PC.

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Choose T1.

Press auto run.

Press “No” to go the Test 2 station.

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8.4.9 Test 2 Station, Backlight and Gamma alignment.

44

Rear view of Color analyzer.

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Choose T2.

45

Choose the type of color analyzer, then press”AUTO RUN”

If you do not need to test next one, press “No” to go to T3 station.

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8.4.10 T3 station, Color temperature check.

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Choose type of Color analyzer&Patterngenerator

Press ”AUTO RUN”

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Check Gamma_6500

Check Gamma_9300

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Check Gamma_11000

49

Turn off the power.

Check the power consumption should<1w

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If not test the next one, press “No” to go to T4 station.

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8.4.11 T4 Station, EDID writing

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Go to the T4 station, press “Start”.

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It will show “All pass” when the work finished.

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8.4.12 T5, SN writing

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Go to the T4 station, press ”Start”.

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If the connection is all right, it will show green check mark.

Input the SN number of TV.

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Press Enter, if it works normally will show ”All Pass”.

8.4.13 Check SN number

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8.4.13.1 Check in OSD

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Menu->Settings->Version

8.4.13.2 Check by Patten generator

Make sure to follow below process:

 Turn on the TV.
 Connect TV with Chromma22293 VGA and HDMI.
 Switch TV source to VGA or HDMI
 Set Chroma 22293

Timing:14 Pattern:701(VGA)
Timing:70 Pattern:701(HDMI)

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9. Trouble Shooting Flow Chart

9.1 No Power

9.2 Can not start

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9.3 No display

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9.4 Abnormal display

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9.5 No sound

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9.6 Key Board

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10. FAQ

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Problem Solution

No power • Make sure the power cord is properly connected to the

LCD TV AC power socket.

• Make sure the AC power cord is properly connected to
the wall outlet.

• Make sure the DC power button is ON (Blue LED).

• Plug another electrical device (like a radio) to the power
outlet to verify that the outlet is supplying the proper
voltage.

No picture • The TV station may be experiencing problems. Try

another channel.

• The Cable TV signal may be scrambled or encoded.
Please contact your local cable operator.

• Make sure that connection to other components are
correct referring to the user guide.

• Make sure that setup has been done correctly after
connections.

• Make sure the correct input is selected and the input

signal is compatible.
Strange color, light color, or color
misalignment

Unit cannot be operated • External influences such as lightning or static electricity

No sound • Check your audio connections are properly connected

• Ensure that the video cable is securely connected.

• The picture may appear dim in a brightly lit room.

• Adjust brightness, contrast, saturation (color), and tint

referring to the user guide.

• Check the input signal setting.

may cause improper operation. In this case, operate the

unit after first turning on the power of the LCD TV and the

AVC System, or unplug the AC cord for 1 to 2 minutes,

then plug in again.

referring to the user guide.

• The MUTE button may have been pressed, try pressing

this button again.

• Check your audio settings, your TV audio may be set to

minimum.

• Press the Volume + (Up) button on the remote control.

Remote control unit does not operate • Make sure the directions of batteries are inserted

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correctly referring to the user guide.

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• Batteries could be weak or dead. Replace with new

batteries.

• Is a fluorescent light illuminated near the remote control

sensor?

• The path of the remote control beam may be blocked.

Make sure the path is clear and that the remote control is

aimed at the remote control sensor on the TV.

• Press the POWER button on the remote control to see if

you can turn on the TV.

• Press MENU button on the remote control to see if

there is a MENU shown on the screen.

• Press only one button at a time and it is the correct one

for the operation you want to perform.
Picture is cut off/with sidebar screen • Is the image positioned correctly?

• Are screen mode adjustments such as picture size set

correctly?

• Press WIDE button repeatedly on the remote control to

see if you can get the picture you prefer.
Power is cut off suddenly • Is the sleep timer set in advance?

• Is there no signal in PC mode or HDMI mode?

• The internal temperature of the unit has increased.

Remove any objects blocking the vent or clean as

necessary.
No CATV reception (or no reception
above CH13)

• Is the AIR/CABLE option set correctly?

Please set the AIR/CABLE option to CABLE referring to

the user guide.

• CATV is connected improperly or not connected; please

check all the CATV connections.

• The cable TV service is interrupted; please contact your

cable operator.

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* Reader’s Response*

63

Dear Readers:
Thank you in advance for your feedback on our Service Manual, which allows continuous improvement
of our products. We would appreciate your completion of the Assessment Matrix below, for return to
ViewSonic Corporation.

Assessment

A. What do you think about the content of this Service Manual?

Unit Excellent Good Fair Bad

1. Precautions and Safety Notices

2. Product Specification

3. Function Description

4. Block Diagram

5. Exploded Diagram and Exploded Parts List

6. Disassembly Procedure

7. Recommended Spare Parts List

8. BIOS /Firmware Update SOP

9. Trouble Shooting Flow Chart

10. FAQ

B. Are you satisfied with this Service Manual?

Item Excellent Good Fair Bad

1. Service Manual Content

2. Service Manual Layout

3. The form and listing

C. Do you have any other opinions or suggestions regarding this service manual?

Reader’s basic dada:

Name: Title:
Company:
Add:
Tel: Fax:
E-mail:

After completing this form, please return it to ViewSonic Quality Assurance in the USA at facsimile
1-909-839-7943.

ViewSonic Corporation Confidential - Do Not Copy VT2645-M