ViewSonic N4261w-1M User Guide

Service Manual

ViewSonic N4261w-1M

Model No. VS11439-3M

42” LCD TV

(N4261w-1M_SM Rev. 1a Mar. 2007)

ViewSonic® 381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

Copyright

Copyright © 200
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 war r ant ies, either expressed or impl i ed, 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.

Product disposal at end of product life

The lamp in this product contains mercury. Please dispose of in accordance with local, state or federal laws.

7 by ViewSonic Corporation. All rights reserved. No part of this publication may be

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 03/13/07 Initial Release Sophia Kao

ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

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TABLE OF CONTENTS

1. Precautions and Safety Notices............................................................... 1

2. Specification............................................................................................... 4

3. Front Panel Function Control Description............................................... 6

4. Circuit Description..................................................................................... 7

5. Adjustment Procedure.............................................................................. 17

6. Trouble Shooting Flow Chart.................................................................... 22

7. Block Diagram........................................................................................... 25

8.PCB Layout Diagrams................................................................................. 26

9. Schematic Diagrams.................................................................................. 31

10. Exploded Diagram And Parts List.......................................................... 49

11. Assembly and disassembly procedure.................................................. 53

12. Recommend Spare Parts List................................................................. 57

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1. Precautions and Safety Notices

All rights reserved. No part of this publication may be reproduced, transmitted, transcribed,

stored in a retrieval system or translated into any language in any form or by any means,

electronic, mechanical, magnetic, optical, chemical, manual, or otherwise, without the prior

permission of the company.

Disclaimer

We make no representations or warranties, either expressed or implied, with respect to the

contents of this document, and specifically disclaims any warranties, merchantability or fitness

for any particular purpose. Further, reserves the right to revise this publication and make

changes in the contents without obligation to notify any person of such revision or change.

All rights reserved

VGA and XGA are registered trademarks of International Business Machines Co. Inc.

Product safety notice

Many electrical and mechanical parts in this product include specific, safety related

characteristics. These characteristics may not be immediately obvious by visual inspection and

the protection these components offer can not necessarily be obtained using replacement

components with the same voltage or power ratings.

offer can not necessarily be obtained using replacement components with the same voltage or

power ratings. Electrical components having such features are identified by shading on the

schematic diagram and in the parts list. Before replacing components, read the parts list in this

manual thoroughly.

The use of substitute parts which do not have the same safety characteristics as those indicated

in the parts list may cause electrical shock, fire, x-ray emissions, or other hazards.

Service notes

1. When replacing circuit boards or components, clamp the lead wires to the terminals before

soldering.

2. When replacing a high power resistor (oxide metal film resistor) on a circuit board, keep the

resistor at least 10 mm (0.5-inch) from the circuit board.

3. Keep leads and wires away from high voltage and high temperature components.

4. If any fuse in the product is blown, replace it only with the correct fuse specified in the parts

list.

Handling of broken glass and liquid crystal leakage

If the LCD is damaged, liquid crystal leakage may occur and the glass may shatter into small pieces. Do

not touch the broken glass or liquid crystal which is toxic. In addition to possible cuts resulting from

broken glass, toxic leakage may cause skin irritation or poisoning. If liquid crystal enters your eyes or

mouth, you should immediately rinse with clean water and consult a doctor.

Important safety information

1. Read all these instructions.

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2. Save these instructions for later use.

3. Unplug this television set from the wall outlet before cleaning.

4. Do not use accessories not recommended in the user manual as they may damage the product.

5. Do not use this product in wet locations such as near a bathtub, washbowl, kitchen sink, laundry

tub, swimming pool, or in a wet basement

6. Do not place this product on an unstable cart, stand, or table. The television receiver may fall

and causeserious injury as well as possibly damaging the product. Use only with a cart or

stand recommended serious injury as well as possibly damaging the product. Use only with a

cart or stand recommended instructions and only use a mounting kit as recommended by the

manufacturer.

7. Blocking the ventilation holes can cause overheating and fire. Take care not to block any

ventilation holes when siting the television close to walls or other objects. Never install this

product in a closed cabinet or bookcase unless sufficient ventilation is provided.

8. This television should be operated using only the type of power source indicated on the label

and in the user manual. If you are unsure what your home power supply is, you should

consult the Power Company or talk to your television dealer.

9. This television is equipped with a plug designed to fit only one way in the power socket. The

earth pin is an important safety feature of the plug. If the plug does not fit your outlets or your

outlets do not include a hole for the earth pin, you should consult a qualified electrician about

replacing the socket.

10. Do not rest anything on the power cord and do not allow the power cord to lie in a position

where it is likely to be stepped on or tripped over.

11. Follow all warnings and instructions marked on the television receiver.

12. During thunderstorms and when the television is unused for extended periods of time, you

should unplug the power cord from the outlet and disconnect the antenna.

13. External antenna systems should be sited away from overhead power lines and away from

electrical circuits. Extreme caution should be exercised when erecting an outside antenna.

Touching overhead power cables can be fatal.

14. Do not overload power outlets or extension cords as fire or electric shock can result.

15. Never push anything into the television through the ventilation slots as they may come into

contact with high voltage elements of the device and cause electric shock or fire. Take care

never to spill liquids into the product.

16. Servicing of this product should only be carried out by qualified service technicians.

17. Unplug this product from the power source and consult a qualified service technician in the

following

cases:

• The power cord is damaged or frayed.

• Liquid is spilled into the television.

• The television is exposed to rain or water.

• The television does not operate as the user manual describes. In this case, use only

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the controls covered by the operating instructions. Improper adjustment of this equipment

using controls not covered in the user manual may result in damage to the product that may

require extensive work by qualified technicians to rectify.

• The television or cabinet is damaged.

• The television shows a change in performance that indicates a need for servicing.

18. When replacement parts are used, ensure that the technician uses only parts recommended

by the manufacturer. Unauthorised replacement parts may cause a fire or electric shock.

19. After servicing, ensure that the technician performs routine safety checks to determine

whether the television is in a safe operating condition.

20. When moving this equipment, care should be taken to prevent damage due to dropping,

falling or impact.

Introduction

This service manual covers the LCD TV and is intended for the use of qualified service

engineers only. Service and repair of this product by unqualified persons may result in

permanent damage to the product or personal injury and should not be attempted.

This manual includes:

ʳʳʳʳΗA block diagram of the LCD TV

ΗAn explanation of theory of operation
ΗAn explanation of the service mode to enable you to adjust the internal settings
ΗA step by step guide to assembly and disassembly of the product
ΗA complete parts list for the product
ΗAn exploded diagram of the product
ΗPictures of the printed circuit boards

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2. Specification

Panel Type 42” (full 41.5” viewable diagonal area)

Active Matrix Wide-XGA, 1360 x 768

Viewing angles 42” 178° (H) / 178° (V)

Channel Capabllity ATSC/NTSC VHF/UHF: 2-69 (ATSC/NTSC)

CATV : 1-125 (NTSC)

Connection TerminalsTV AIR IN VHF/UHF: 2-69 (ATSC/NTSC)

CATV: 1-125 (NTSC)

S/AV Video IN x 2

S-Video IN x 1

(S jack has priority when S-jack and Video-jack plug in at the same

time) Audio IN x 2

COMPONENT COMPONENT Video x 2 (YCbCr/YPbPr)(support 480i, 480P, 720P,

1080i) Audio IN x 2

PC VGA IN x 1

Audio IN x 1 (3.5mm Jack)

HDMI HDMI x 2

Audio IN x 1 (For HDMI Analog Audio)

Audio Out Analog Audio Out x 1(Fixed)

Compatibility Mode Compatible Inputs

720 x 400 @ 70 Hz PC, HDMI

640 x 480 @ 60/75 Hz PC, HDMI

800 x 600 @ 60/75 Hz(VESA) PC, HDMI

832 x 624 @ 75 Hz (Mac) PC, HDMI

1024 x 768 @ 60/75 Hz(VESA) PC, HDMI

1280 x 720 @ 60 Hz PC, HDMI

1280 x 768 @ 60 Hz(VESA) PC, HDMI

1280 x 1024 @ 60 Hz(VESA) PC, HDMI

1360 x 768 @ 60 Hz PC,HDMI

480 I 60 Hz(NTSC) AV/S,HD

480 P 60 Hz(DVD) HDMI

720 P 60 Hz HDMI

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1080 I 60 Hz HDMI

1080P 60HZ HDMI

Speaker Output 10 W + 10 W

Power Voltage 100-240 VAC, 50/60 Hz (auto switch),

42” : 260W(MAXIMUN)

Operating Temperature 0°C to 40°C (32°F to 104°F)

Conditions Humidity 10% to 85% (no condensation)

Altitude To 3000 meters

Storage conditions Temperature -20°C to 60°C (-4°F to 140°F)

Humidity 10% to 85% (no condensation)

Altitude To 12,000 meters

Dimensions Physical 42” : 1070 mm (W) x 815 mm (H) x 300 mm (D)

42.2” (W) x 32.1” (H) x 11.9 “(D)

Package 42” : 1190mm (W) x 970 mm (H) x 420 mm (D)

46.9” (W) x 38.2” (H) x 16.6 “(D)

Weight Net 42” : 38 kg (83.8 lb.)

Gross 42” : 45 kg (99.2 lb.)

Regulations FCC-B, c-UL, CB, NOM

Power saving modes stand by <1.5 W (LED light off)

Preset Timing Mode (Pre-adjusted to VESA 1360 x 768 at 60 Hz)

Warning : Do not set the graphics card in you computer to exceed these refresh rates. Doing so may result in

permanent damage to the LCD.

Note : Product specifications are subject to change without notice.

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3. Front Panel Function Control Description

1. CH ϧ/ ϰ

Changes the channel.

2. VOL +/–

Used for changing the volume.

3. MENU

Display menu screen

4. SOURCE

Switch between display input sources.

5. POWER

Turns the TV on and off. A green light indicates that TV is on and red that it is off.

6. EARPHONE

Used for connecting headphones to the TV.

7. Power indicator LED

GREEN shall apply during all operational states (i.e. with image present), LED light off when

the product in stand-by mode. Red light apply when no PC/HDMI signals in PC/HDMI mode

after 15 sec.

8. SPEAKERS

Audio output.

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4. Circuit Description

Power Circuit:

Switching mode power supply provided 3 sets of Vcc power supply +5V, +12V and +24V. The

Details please refer to page 26 of schematic.

Vcc +5V : supply to Stand-By U48 chip and Main Board or Panel LVDS.

Vcc +12V : supply to Audio Processor, Audio Class-D AMP or Panel LVDS.

Vcc +24V : supply to Panel’s inverter.

A.

Cold-Opening Mode

i.

Switching power will produce +5V when plug in and transmit to the Vsub pin of Stand-By U41 chip

Κ

via J17.

J11

1

V12IN

R318 0_NC

2
3
4
5
6

Vsub

R319

0

7
8

9
10
11

+5V Always on

12
13

ii. This machine is in Stand-By Mode now.

B.

Stand-By Mode(+5V)

i. When this machine is in Stand-By mode, only U41 SM5964C40J keep working, so the system can

assure the consumption power is < 1.0W in Stand-by Mode.

Κ

C. Power ON Mode(+5V ,+12V)

i. Receives the start order

When the system receives the start order by Power Key of the remote control ΰsignal mark IRupα

or Power ON/OFF of the control panelΰsignal mark PWSWα, it will process the following action.

V5up

U41 SM5964C40J

43
42
41
40
39
38
37
36

2
3

PWSW

4
5
6
7
8
9

21
20

35
10

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P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7

P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7

XTAL1
XTAL2

EA/VPP
RST

44

VCC

P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13

P2.6/A14
P2.7/A15

P3.0/RXD

P3.1/TXD
P3.2/INT0
P3.3/INT1

P3.6/WR

P3.7/RD

ALE/PROG

GND

22

P2.0/A8
P2.1/A9

P3.4/T0
P3.5/T1

PSEN

24
25
26
27
28
29

30
31

11
13
14
15
16
17
18
19

33
32

R307 3.3K

C484
.01

V5up

R304

3.3K

IRup

7

ii. Switching power ON

When Switching power receives the start order by 2

Then by Q25 2N7002 (signal mark V12_ON) and 1

nd

pin of U41 (signal mark POWERON),

st

pin of J11 to control Switching Power Model

provides +12V (POWER STREE, refer to page 20 of schematic) and +24V , turn on the circuit of

+5V(signal mark VCC).

V5up

Hi=POWER ON

J11

1
2

3
4
5
6

7
8
9
10
11

12
13

V12_ON

V12IN

R3180_NC

0

R319

Vsub

To Switching Power

V5up

R298

5.6K

1

C488

2N7002

10U

2

Q15

D

PWRON

G

C482

S

.1

R3002.2K

Lo=POWER ON

U41 SM5964C40J

44

43

42
41
40
39

38
37
36

2
3
4
5

6
7
8
9

21
20

35

10

P0.0/AD0

P0.1/AD1
P0.2/AD2
P0.3/AD3
P0.4/AD4

P0.5/AD5
P0.6/AD6
P0.7/AD7

P1.0
P1.1
P1.2
P1.3

P1.4
P1.5
P1.6
P1.7

XTAL1
XTAL2

EA/VPP
RST

P2.0/A8
P2.1/A9

VCC

P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15

P3.0/RXD

P3.1/TXD

P3.2/INT0

P3.3/INT1

P3.4/T0
P3.5/T1

P3.6/WR

P3.7/RD

ALE/PROG

GND

22

iii. VCC ON/OFF

+5V (signal mark VCC) turn on when V12_ON=Hi, Every batches of digital board circuit would be

able to process Power ON procedure.

Vsub

VCC ON/OFF

Q23

AP4435M

VCC

PSEN

24
25
26
27
28
29
30
31

11
13

14
15
16
17
18
19

33
32

+5V Always ON

V12_ON

L123 PBY32-190

R340
10K

Q24
3904

B

R343
10K

C

E

1

C510

470U

2

1

S1

2

S1

3

S1

4

G1

8

D1

7

D1

6

D1

5

D1

To every batches of

digital board circuit

iv. CPU RESET

U18 PW328 CPU will output a Hi level to trigger other IC to reset when +5V, +12V and +24V start to

work. Then Firmware starts to read the data of U33 via U29 PWM2030 CPU and transmits data via

I2C BUS and sends control signal to run the TURN ON procedure.

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V33

V33

RESET IC

U19

V33

C194 .1

5

1

2

4

To RESET TUNER, HDMI

3

RESETn P{2,4,12,14,15}

MSP4440K,PWM2030

SW1
SW_MOM_4P

2
3

RSTn

1
4

RESET

To RESET PW106

R141

2.2K_NC

G

GND

VCC

R

RESET

CAT809RTB

R140

1

C193

100U

2

5.6K

I

U20

74LVC1G126

v. PANELVCC ON

In the period of POWER ON, the signal of control PANELVCC output a Hi level signal from PW328

I/O port PNLPWR, PANELVCC will supply power to Panel via LVDS output Header J4.

AP4435M

1

S1

2

S1

3

S1

4

G1

Q22
3904

Q21

D1
D1
D1
D1

PANELVCC

8
7
6
5

12

C502

100U

C503

.1

PANELVCC ON/OFF

For 37" LG AUO Panel

V12

VCC

For 32" Samsung Auo Panel

PNLPWRP{9}

L119 PBY20-221

L120 PBY20-221

R335

10K

R334
10K

R331 10K

CE

B

vi. INVERTER ON

When POWER ON, the signal of control Backlight-ON will output from I/O port BKLTPWR of U18

PW328 via Q20, Q19 to 13

th

pin of J11 and sends to Switching Power supply. Then Switching

Power Supply forwards the signal to the Inverter of Panel and turn it on.

J11

1
2
3
4
5
6
7
8

9
10
11
12
13

INVERTERON/OFF

BKLTPWRP{9}

R325 10K

R326
10K

R324
10K

B

Vsub

C

E

Q20

3904

V12IN

R318 0_NC

0

R319

Vsub

Backlight ON=4.5V

1

C493
10U_NC

2

For 32" Power
For 37" Power

VCC

R322
510

G

D

Q19

2N7002

S

C492

.1

vii. BACKLIGHT ADJUST

The signal of Backlight Adjust which output from PWM I/O port of U18 PW328 sending a PWM

signal to U42 C491 converged into a DC signal then forward to Inverter of Panel via 12

th

pin of J11

to adjust the brightness of Backlight.

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J11

1

V12IN

R317 4.7K_NC

BACK LIGHT ADJ

C490

.1

PWM1

PWM2

R321

10K

PWMP{9}

R320 47K

V12

8

5

+

6

-

4

LM358

R323 4.7K

U42B

7

For 32" Power
For 37" Power

VPWM

Vsub

R318 0_NC

C491

.1

0

1

C511
10U_NC

2

R319

2
3

4
5
6

7
8
9

10
11
12

13

viii. AUDIO AMP MUTE ON/OFF

The control signal of AMP MUT was outputed from MUTE1 and MUTE2 I/O port of PW328. MUTE2 will

control the RC JACK Audio Output Mute. (For preventing from abnormal sound occurred when turn on TV

set, Audio Amp Mute will act in first and last procedure)

AUD__R
AUD__L

J6

1

L80 SBK16-102

L81 SBK16-102

2

L82 SBK16-102

3

L83 SBK16-102

4

5

Vsub

EARPHONE OUT

C339101

C340101

C341101

R198 0

C33522U

+

C33722U

+

AUD__L

AUD__R

Vsub

R199
10K

C336 10U

C338 10U

AUDL

+

AUDR

+

AUDL P{13}

AUDR P{13}

AMP_MUTEP{13}

MUTE1P[14]

Lo=MUTE

R200 10K

C312

1 2R1831K

Vsub

C315

471

10U

R18710KR18610K

C323

R1921K

1 2

C325

10U

471

C

B

E

LINER

Q10

MMBT3904

B

LINEL

Q12

Q13

3904

E C

CON8

1

R185
470K

2

3

HSP-242V2

MMBT3904

MUTE2P{14}

R19510K

Hi=MUTE

B

R194

470K

E C

AUDIO OUTPUT

ix. THE THREE BIRDS LOGO

The ViewSonic Logo will show up in 6 seconds after program execution, then disappeared. All the

POWER ON procedure will be finished when AMP Relay sound be heard and screen displayed.

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D.

POWER OFF Mode

Κ

i. After POWER ON procedure finished, the signal of Keypad and remote control will transform to

PW328 for further processing. U41 chip did not handle the signal of Keypad and remote control any

more. When the system receives the power off order by Power Key of remote control or Power

ON/OFF of the keypad. Firstly PW328 will send current screen status to memory U30 via I2C bus,

then the PWRDOWN I/O port of PW2030 will send a Hi signal to U48 closing the Switching power.

PWRDOWNP{9}

Antenna Circuit:

V5up

R357
10K

R301 1K

POWER OFF=Lo

12

C483

100U

P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7

P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7

XTAL1
XTAL2

EA/VPP
RST

V5up

44

VCC

P2.2/A10
P2.3/A11
P2.4/A12
P2.5/A13
P2.6/A14
P2.7/A15

P3.0/RXD

P3.1/TXD
P3.2/INT0
P3.3/INT1

P3.6/WR

P3.7/RD

ALE/PROG

GND

22

P2.0/A8
P2.1/A9

P3.4/T0
P3.5/T1

PSEN

24
25
26
27
28
29
30
31

11
13
14
15
16
17
18
19

33
32

U41

SM5964C40J

43
42
41

V5up

R299
10K

32

1

Q11
MMBT3906

40
39
38
37
36

2
3
4
5
6
7
8
9

21
20

35
10

Tuner (TUV1236D) has two RF inputs. Left was the connector of Terrestrial input ; Right was the connector of CATV

Input.

A.

Terrestrial Input Connector

Κ

Connects to your ATSC antenna and receives broadcasting signals. There are two signals ; Analog TV

(NTSC signal) and Digital TV (ATSC signal) could be received.

zAnalog TVΰNTSC signalα

Tuner TUV1236D receive the signal come from RF NTSC signalΔSelects desired channel and

demodulate image composite signal (signal mark T1CVBS) by pin 14 of Tuner output to U18 PW328

decoder via path C174 and audio SIF signal (signal mark T1SND) by pin15 of Tuner output to U27

MSP4440K via C322 for demodulating MTS/SAP of Digital TV signal (ATSC signal).

Tuner TUV1236D receive the signal come from ATSC signalΔSelects desired channel and converts

analog signal into MPEG Transport Stream via Tuner TS1( Transport stream TS1DATA0-TS1DATA7)

bus into U29 PWM2030 to separates MPEG video and AC3 digital audio.

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LEFT

RIGHT

44

44

TERRESTRIAL INPUT

CABLE INPUT

41

41

NC11NC33NC22NC44NC555V_TUNER95V_IF

PHILIPS SEM

TUNER NIM MODULE

(40 PINS)

5V_RF_SW6IF211IF110CVBS14AF_MPX122ND_IF_SOUND

AGC_MONITOR7VT_MONITOR

8

15

13

RESERVED16ANT_CTRL

18

17

GND1

43

43

U1

TUV1236D/FH

POWER_RST

GND228MPEG_ERR29MPEG_PKT_SYNC

SDA20SCL

5V_DIGITAL

21

19

AS126AS0

2_5V243_3V231_2V

27

31

30

25

22

MPEG_DATA436MPEG_DATA335MPEG_DATA234MPEG_DATA133MPEG_DATA032MPEG_DATA_EN

37

T12NDIF

MPEG_DATA638MPEG_DATA5

MPEG_DATA7

MPEG_CLK

42

39

40

42

R9 0

R12
75

TS0DATA7
TS0DATA6
TS0DATA5
TS0DATA4

TS0DATA3
TS0DATA2
TS0DATA1
TS0DATA0

TS0CLK P{17}
TS0VALID P{17}
TS0SYNC P{17}
TS0ERR P{17}

TS0DATA[7:0] P{17}

T1SND P{12}
T1CVBS P{8}

B.

CATV Input Connector

Κ

Connecting to your coaxial cable from local TV station.

zTuner TUV1236D receive the signal come from CATV signalΔSelects desired channel and

demodulate image composite signal (signal mark T1CVBS) by pin 14 of Tuner output to U19 PW328

VDC decoder via C224 and audio SIF signal (signal mark T1SND) by pin 15 of Tuner output to U29

MSP4450G via C396 for demodulating MTS/SAP.

MPEG Processor PWM2030:

When MPEG Transport Stream data input U29 PWM2030 internal decoder Separates MPEG video and

AC3 digital audio .The digital video output from PWM2030 Digital Video Signal Output port (19 Pins) to

U18 PW328 digital input port (port 1) . The digital audio output via I2S bus (MPEG_CL, MPEG_WS,

I2S_DI1) to the externally connected DA converter( U27 MSP4440K) and via SPDIF to optical(P5) &

Coaxial(P4) . Each of these functions was described in more detail in the sections that follow.

Digital Audio Signal output

P{9}

MPEG_WS

MPEG_CL

P{9}

MPEG_DI1

P{9}

PWSPDIFP{12}

R359 100_NC
R360 100_NC
R361 100_NC

Small

TP39

Small

TP40

Small

TP42

R293 100
R294 100
R295 100

R362 100

1
1
1

I2S2WS0
I2S2CK0
I2S2SD0

U29E PWM2030

B9

AOSCKO

A9

AOSCKI

B13

I2S0WSI

C13

I2S0CKI

D13

I2S0SDI

A12

I2S1WSI

B12

I2S1CKI

C12

I2S1SDI

D12

I2S2WSI

B11

I2S2CKI

C11

I2S2SDI

A10

I2SWSO

B10

I2SCKO

C10

I2SSDO

D10

SPDIFO

SMIRQ

SMCLK0

SMDATA0

SMCLK1

SMDATA1

SIOCLK0
SIOCLK1

RXD0

TXD0

RTS0
CTS0

RXD1

TXD1

AD1
AB4

AC1

AC2

AC3

Y3
AA1

AA2
AA3

AA4
AB1

AB2
AB3

ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

12

TS0ERRP{2}

TS0CLKP{2}
TS0VALIDP{2}
TS0SYNCP{2}

TS0DATA[7:0]P{2}

zSystem Control

TS0DATA0
TS0DATA1
TS0DATA2
TS0DATA3
TS0DATA4
TS0DATA5
TS0DATA6
TS0DATA7

U29C
PWM2030

AB24
AB25
AC26
AB23

AE23
AD23
AF24
AE24
AD25
AD26
AC24
AC25

W26

V23
W24
W25

AB26
AA23
AA24
AA25
AA26

Y24

Y25
W23

U23

U24

V25

V26

V24

T25

R23

U26

T24

U25

TS0REQ
TS0CLK
TS0VALID
TS0SYNC

TS0DATA0
TS0DATA1
TS0DATA2
TS0DATA3
TS0DATA4
TS0DATA5
TS0DATA6
TS0DATA7

TS1REQ
TS1CLK
TS1VALID
TS1SYNC

TS1DATA0
TS1DATA1
TS1DATA2
TS1DATA3
TS1DATA4
TS1DATA5
TS1DATA6
TS1DATA7

TS2REQ
TS2CLK
TS2VALID
TS2SYNC
TS2DATA

TS3REQ
TS3CLK
TS3VALID
TS3SYNC
TS3DATA

PIXCLKO0
HSYNCO0
VSYNCO0

VOUT0
VOUT1
VOUT2
VOUT3
VOUT4
VOUT5
VOUT6
VOUT7
VOUT8

VOUT9
VOUT10
VOUT11
VOUT12
VOUT13
VOUT14
VOUT15

PIXCLKO1
HSYNCO1
VSYNCO1

TSCLKI

TSOCLK
TSOVALID
TSOSYNC

TSODATA0
TSODATA1
TSODATA2
TSODATA3
TSODATA4
TSODATA5
TSODATA6
TSODATA7

C14
A15
D14

C19
B19
A19
D18
C18
B18
A18
D17
C17
B17
A17
C16
B16
D15
C15
B15

A13
B14
A14

M23
N23
N25
N24

R24
R25
R26
P23
P24
P25
P26
N26

RCLK1
RHS1
RVS1

RVOUT0
RVOUT1
RVOUT2
RVOUT3
RVOUT4
RVOUT5
RVOUT6
RVOUT7
RVOUT8
RVOUT9
RVOUT10
RVOUT11
RVOUT12
RVOUT13
RVOUT14
RVOUT15

RCLK2
RHS2
RVS2

6
7

2
3
45

6
7

2
3
45

6
7

7
6

RP50
47

RP514718

RP52
47

RP534718

RP54
47

RP55
47_NC

PVOUT0
PVOUT1
PVOUT2
PVOUT3
PVOUT4
PVOUT5
PVOUT6
PVOUT7
PVOUT8
PVOUT9
PVOUT10
PVOUT11
PVOUT12
PVOUT13
PVOUT14
PVOUT15

4 5
3
2
1 8

7
6

4 5
3
2
1 8

7
6

4 5
3
2
1 8
1 8
2
3
4 5

Digital Video Signal output

PCLK1
PHS1 P{8}
PVS1
PVOUT[15:0]

The PWM2030 incorporates a TX49 core core ( 64-bit MCU core ) and a CRISC (Control 32-bit RISC

processor

peripheral controllers such as PCIC (

) for system control. The TX49 core issues instructions to the CRISC as well as to the

PCI Controller) , USB, and UART. Based on the instructions sent

from the TX49 core, the CRISC controls decoders such as video (VDEC), and audio (AUDIO),

System Control Detail Block Diagram

zUnited Memory

DDR SDRAM ( U35 , U36 ) is externally connected to the PWM2030. In addition to the CRISC and

TX49 core, the unified memory allows all internal decoders can share data via VMMS (

Virtual Multi-port

Memory System ,Controls external DDR-SDRAM 64 bits) , which reduces external memory types and

capacities.

13

ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

Unified Memory Block Diagram

zStream Decoder

With the built-in Transport Stream Demultiplexing Processor (TSP), the PWM2030 supports bitstream

input in TS format. The TSP can separate the TS into audio and video PES, analyzing the PES

header, and transferring the PES to the audio and video decoders. The TSP can also transfer any

data from the input stream to external memory.

Stream Decode Block Diagram

zVideo/Audio Signal Output and External Signal Mixing

Video data decoded by the VDEC (Video Decoder ) is graphically processed (overlaid) by the DPG

(

Display Picture Generator ). Digital video signals are directly output from the DPG.

The audio signals decoded by the AUDIO are output as digital data to the externally connected DA

converter. The digital data output is also compatible with the SPDIF format output.

The PWM2030 can externally input both audio and video digital data. The PWM2030 has a function

which mixes the input data internally then outputs them.

ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

14

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15

ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

9,'(2,QSXWFLUFXLW$96<3E3U3&+'0,

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ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

16

5. Adjusting Procedure (Service mode)

An internal settings service menu is provided to allow adjustment of the device by qualified service personal.

Improper use of the internal settings service menu may render the device unusable. Refer to the following sections

to learn how to operate the service menu.

Starting the service mode

To start the service mode of operation and view the internal settings menu, do the following:

1. Switch on the LCD TV and make sure that the TV mode is selected.

2. Press 991 on the remote control to enter the internal Service menu.

3. Press MENU to switch the service mode pages.

4. Press ϧ and ϰ to scroll through the various menu options.

5. Press Ż and Ź to change the menu settings.

6. Press WIDE to save the new settings and exit.

ظΕ TV/AV/S-Video WHITE BALANCE, BRIGHTNESS, CONTRAST ADJUSTMENT:

--WHITE BALANCE ADJUSTMENT--

1. Press 991 on the remote control to enter the internal Service menu.

 2. Press MENU to switch to the PW328 Scaler Menu page

3. Press ϧ and ϰ to scroll to Page 2-3 options

4. Press Ż and Ź to adjust the Offset Red, Offset Blue, Gain Red, Gain Blue menu settings.

5. Press WIDE to save the new settings and exit.

(Please don’t adjust others setting in page 2-3)

--BRIGHTNESS ADJUSTMENT—

1. Repeat the above mentioned step 1 to 2

2. Press ϧ and ϰ to scroll to PW328 FE VDC Menu Page 2-1 options

3. Press Ż and Ź to adjust the Brightness setting.

4. Press ϧ and ϰ to scroll to TV/AV/S Parameter=AV1 setting and press Ź to run the setting. (This

procedure will copy the settings of AV1 to AV2 & TV)

ATSC DTV WHITE BALANCE/BRIGHTNESS/CONTRAST ADJUSTMENT

1. Repeat the above mentioned step 1 to 2

2. Press ϧ and ϰ to scroll to PW328 Scaler Menu Page 2-3 options

3. Press Ż and Ź to adjust the Offset Red, Offset Blue, Gain Red, Gain Blue menu settings

4. Press WIDE to save the new settings and exit.

(Please don’t adjust others settings in page 2-3)

YCbCr & YpbPr of COMPONENT 1, 2 WHITE BALANCE/BRIGHTNESS/CONTRAST ADJUSTMENT

Step 1: Getting COMPONENT 1 connect to 1080i signal. (The settings could not be saved if signals input from

COMPONENT 2 or connect to other sources such as 720P, 480P, 480i…..,etc.)

Step 2: WHITE BALANCE ADJUSTMENT OF Component—

1. Repeat the above mentioned step 1 to 2

2. Press ϧ and ϰ to scroll to PE328 FE ADC page 2-3 options

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ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

3. Press Ż and Ź to adjust the Offset Red and Off Blue settings.

4. Press Ż and Ź to adjust the Offset Green setting.

5. Press Ż and Ź to adjust the Gain Green setting.

6. Press ϧ and ϰ to scroll to 480i/480P/720P Parameter=1080i setting and press Ź to run the setting.

(This procedure will copy the setting of 1080i to 480i/480P/720P)

7. Press ϧ and ϰ to scroll to HD2 Parameter=HD1 and press Ź to run the setting. (This procedure will

copy the setting of HD1 to HD2)

8. Press WIDE to save the new settings and exit.

WHITE BALANCE ADJUSTMENT OF PC INPUT

1. Connecting to VGA Timing mode

2. Under service mode, Press ϧ and ϰ to scroll to PE328 FE ADC page 2-2 options

3. Press Ż and Ź to adjust the Offset Red, Offset Green and Off Blue settings.

4. Press Ż and Ź to adjust the Gain Red and Gain Blue settings.

5. Press WIDE to save the new settings and exit.

OPERATION OF RS232 WRITING

(1) RS-232 mounted on the Main Board was the main interface writing new firmware. You can update new firmware

to U40 by RS232.

(2) Writing firmware need following equipment:

1. RS232 interface built in PC.

2. RS232 cable

3.Pixelworks Flash Upgrader software

(3) Connecting method: connecting RS232 interfaces between PC and TV set.

Firmware writing procedure:

1. Execute Pixelworks Flash Upgrader software

2. Select Baud Rate by 115200

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ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

3. Download “appcode.crams” file.

4. Choose “Flash” mode entering standby status for writing firmware

5. Turn on TV set.

6. “Bytes Bar” will showed on the screen in few seconds indicating firmware was downloading.

7. The download process will take about 4 Minutes. It won’t change the original code when download process

intercepted. Once download process was finished system have to take at least 30 seconds updating new

firmware. Please make sure power was supplied without interruption; otherwise system will shut down.

8. System will restart automatically after finishing writing process.

ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

19

Function Test

A. Control Bottom (control panel and remote control)

Check item

POWER

!

!

Remote control

effective range

Indicator LED

EARPHONE

MENU

!

CHANNEL

!

!

!

!

Describe

Press [POWER] to turn ON or OFF LCD TV

The effective range is 5 meter from LCD sensor.

!

!

!

TURN ON : green light

TRUN OFF (standby mode): red light DPMS state for PC/HDMI mode :red light

!

Plug in the earphone, check the speakers is mute

Plug in the earphone, check the earphone is working

Plug in the earphone, Adjust the VOLUME and make sure the volume of

earphone follow the adjusting

!

Press [MENU] key to make sure the OSD picture will show out

Press [Channel]

ϧϰ

to check the channel number change normally

!

Press [RECALL] to check switching previously viewed channel normally

VOLUME

SOURCE

SCREEN

AUDIO

!

!

Press [NUMBER KEY] and [-/100] to enter the channel number

!

!

!

Press + - to check the volume Increases or decreases

!

Press [SOURCE] KEY and check each signal source is normally

Press [HDMI], [PC], [S-VIDEO], [AV], [COMPONENT] to enter

HDMI,PC,S-VIDEO, AV,COMPONENT mode

!

!

Press [WIDE] will switches in several screen mode :AUTO,4:3,16:9,14:9)

Press [Display] will show the input signal source

!

Press [MUTE] to disable the audio output

Press [MTS/SAP] to switch SAP,MONO,STEREO mode.

!

!

!

!

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ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

B. OSD (MENU)

Press [menu] to check the OSD and adjust by

Check item

Picture

!

!

Describe

Press

!

ϧϰ

to check the BAR slide :Brightness- Contrast - Sharpness- color- Tint-

Video mode –Color Temp –Back light

Press

to check the red bar or number increases or decreases .Video mode :

WX

Soft ,User ,Preset . Color Temp: Nature, Warm, Cool, Normal.

Img.adj

!

Press

Press

ϧϰ

to check the BAR slide : Image- Freeze Frame

to check the red bar or number increases or decreases.

WX

Image Size : Fill All, 1 to 1, Normal, Wide, Zoom, Anamorphic, Subtitle.

!

to check the BAR slide : Input Source – View Firmware Vison

to check the red bar or number increases or decreases.

to check the BAR slide : Osd language- Closed Caption Setup – Sleep

Source

Setup

Freeze :On/ Off

!

Press

Press

!

!

Press

ϧϰ

WX

ϧϰ

Timer- Osd setting-Factory Reset

ϧϰ

WX

KEY

!

Audio

Tuner

Press

to check the display language correctly. OSD Language : English,

WX

Spanish, French.

Press

ϧϰ

to check the BAR slide of Closed Caption Setup : Closed

Caption-Analog CC service-Digital CC service- Digital CC Font Size –Digital CC

Style- Digital Forefround-Digital Background Color-Digital Background Opacity

Press

Press

Press

Press [EXIT] to make sure the setting has been saved.

Press

to adjust the setting.

WX

ϧϰ

to check the BAR slide of Osd setting : Transparency-Osd Timeout

to adjust the setting.

WX

ϧϰ

to check the BAR slide : Volum-Treble-Bass-Balance-Audio

!

mode-Speaker mute-Analog audio-SRS mode

Press

to adjust the setting. Audio Mode : Soft ,User, Preset. SRS Mode :

WX

“TruSurround or OFF

Press

Press

ϧϰ

to check the BAR slide : TV Tuner Setting-Channel Setting

ϰ

to check the BAR slide of TV Tuner Setting : Auto search ,TV mode

Press

Press

V-chip

Press

Press

!

ViewSonic Corporation Confidential - Do Not Copy N4261w-1M

to adjust the setting.

WX

ϰ!

andX to check the BAR slide of Channel setting : Edit Channels

ϧϰ

to check the BAR slide : Password-Film Blocking-TV Blocking

ϧϰ

to set the setting

WX

21