ViewSonic VS10769-1M Bedienungsanleitung

Service Manual

ViewSonic N3250w

Model No. VS10769-1M

LCD TV Display

(N3250w-1M_SM Rev. 1a Oct 2005)

ViewSonic® 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

ViewSonic Corporation iConﬁdential - Do Not Copy N3250w-1M

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

urpose. 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

ViewSonic is a registered trademark of ViewSonic Corporation.

All other trademarks used within this document are the property of their respective owners. Optiquest is a

registered trademark of ViewSonic Corporation.

Revision History

Revision SM Edciting Date ECR Number Description of Changes Editor

1a 10/05/05 Initial Release N. Lin

ViewSonic Corporation ii Conﬁdential - Do Not Copy N3250w-1M

TABLE OF CONTENTS

1. Precautions and Notices 1

2 Service Tool & Equipment Required 2

3. Speciﬁcation 2

4. Exploded View and Parts List 6

5. Recommended Spare Parts List 9

6. Block Diagram 18

7. Schematic Diagram 19

8. Working Theorem 32

9. Wiring Diagram 34

10. PCB Layout 35

11. Trouble Shooting Flow Chart 41

12. Adjustment 45

13 Electrical Parts List 47

14. Appendix 63

1. PRECAUTION AND NOTICES

1.1. SAFETY PRECAUTIONS

This LCD TV is manufactured and tested on a ground principle that a user's safety comes first.

However, improper use or installation may cause damage to the LCD TV as well as to the user.

Carefully go over the following WARNINGS before installing and keep this guide handy.

WARNINGS:

! This LCD TV should be operated only at the correct power sources indicated on the label on

the rear end of the LCD TV. If you're unsure of the power supply in your residence, consult

your local dealer or power company.

! Use only the special power adapter that comes with this LCD TV for power input.

! Do not try to repair the LCD TV yourself as it contains no user-serviceable parts. This

LCDTV should only be repaired by a qualified technician.

! Do not remove the LCD TV cabinet. There is high-voltage parts inside that may cause

electric shock to human bodies, even when the power cord is unplugged.

! Stop using the LCD TV if the cabinet is damaged. Have it checked by a service technacian.

! Put your LCD TV only in a clean, dry environment. If it gets wet, unplug the power cable

immediately and consult your service technician.

! Always unplug the LCD TV before cleaning it. Clean the cabinet with a clean, dry cloth.

Apply non-ammonia based cleaner onto the cloth, not directly onto the glass screen.

! Keep the LCD TV away from magnetic objects, motors, TV sets, and transformer.

! Do not place heavy objects on the LCD TV or power cord.

1.2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety visual inspections and the

protection afforded by them cannot necessarily be obtained by using replacement components

rated for higher voltages, wattage, etc. Before replacing any of these components read the parts

list in this manual carefully. The use of substitute replacement parts which do not have the same

safety characteristics as specified in the parts list may create shock, fire, or other hazards.

1.3. SERVICE NOTES

1. When replacing parts or circuit boards, clamp the lead wires around terminals before

soldering.

2. When replacing a high wattage resistor (more than 1W of metal oxide film resistor) in circuit

board, keep the resistor about 5mm away from circuit board.

3. Keep wires away from high voltage, high temperature components and sharp edges.

4. Keep wires in their original position so as to reduce interference.

5. Usage of this product please refer to also user's manual.

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2. SERVICE TOOL & EQUIPMENT REQUIRED

1. SIGNAL GEN.

2. MULTIMETER

3. OSCILLOSCOPE

4. SCREW DRIVER

5. IRON

6. ABSORBER

7. SOLDER

8. DUMMY LOAD (5Ω/200W)

9. DVD PLAYER

3. SPECIFICATIONS

3.1. PRODUCT SPECIFICATIONS

LCD Panel 32" TFT

Power Management < 5W

(OFF MODE)

Displayable Resolution VESA 1280×1024 max.

PixelDimension 0.51075(H)×0.51075 (W)mm

LCD Display Color 16.7M Color Max. (8bit/color)

Viewing Angle CR≧10

Horizontal: -85°+85°

Vertical: -85°+85°

Contrast Ratio 800 : 1 (typical)

Brightness 500 cd/m2 (typical)

Response Time Tr: 8 ms , Tf: 8ms (typical)

Active Display Area 697.68mm×392.26mm

RF Tuner Input level: 0 ~ +15 dB mV

Rang: NTSC 55.25 to 801.25 MHz, 2-69 channels for Off-Air

and 2-125 Channeis for CATV

Power Voltage: 100~240 V

Consumption: 200 Watts (Max.)

Speaker 10W×2

Compliance FCC,UL

Temperature Operating : 0°C~ +40°C

Storage : -20°C~+60°C

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3.2. FACTORY SUPPORTING MODES

ITEM 1 2 3 4

TIMING 640×480 60HZ 640×480 75HZ 800×600 60HZ 800×600 75HZ

Pixel Rate 25.175MHZ 31.500MHZ 40.000MHZ 49.500MHZ

H TOTAL 31.778us 26.667us 26.400us 21.333us

H DISPLAY 25.422us 20.317us 20.000us 16.162us

H B-Porch 1.907us 3.810us 2.200us 3.232us

H Width 3.813us 2.032us 3.200us 1.616us

H Border 0.318us 0.000us 0.000us 0.000us

V TOTAL 16.683ms 13.334ms 16.579ms 13.333ms

V DISPLAY 15.253ms 12.800ms 15.840ms 12.800ms

V B-Porch 1.049ms 0.427ms 0.607ms 0.448ms

Vs Width 0.064ms 0.080ms 0.106ms 0.064ms

V Border 0.254ms 0.000ms 0.000ms 0.000ms

H/V Sync -/- -/- +/+ +/+

Interlace No. No. No. No.

ITEM 5 6 7 8

TIMING 1024×768 60HZ 1024×768 75HZ 1280×720 60HZ 1280×768 60HZ

Pixel Rate 65.000MHZ 78.750MHZ 74.250MHZ 65.000MHZ

H TOTAL 20.677us 16.660us 22.222us 20.677us

H DISPLAY 15.754us 13.003us 17.239us 15.754us

H B-Porch 2.462us 2.235us 2.936us 2.462us

H Width 2.092us 1.219us 1.007us 2.092us

H Border 0.000us 0.000us 0.000us 0.000us

V TOTAL 16.666ms 13.328ms 16.667ms 16.666ms

V DISPLAY 15.880ms 12.795ms 16.000ms 15.880ms

V B-Porch 0.600ms 0.466ms 0.444ms 0.600ms

Vs Width 0.124ms 0.050ms 0.111ms 0.124ms

V Border 0.000ms 0.000ms 0.000ms 0.000ms

H/V Sync -/- +/+ -/- -/-

Interlace No. No. No. No.

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ITEM 9 10 11 12

TIMING 1360×768 60HZ 1280×1024 60HZ

Pixel Rate 85.5MHZ 108MHZ

H TOTAL 20.959us 15.630us

H DISPLAY 15.906us 11.852us

H B-Porch 2.994us 2.296us

H Width 1.310us 1.037us

H Border 0.000us 0.000us

V TOTAL 16.662ms 16.661ms

V DISPLAY 16.097ms 16.005ms

V B-Porch 0.377ms 0.594ms

Vs Width 0.126ms 0.047ms

V Border 0.00ms 0.00ms

H/V Sync +/+ +/+

Interlace No. No.

3.3. D-SUB & HDMI CONNECTOR

Connector pin assignments for VGA cable

The signal cable connector shall be a molded-over, shield twisted pair cable. The cable shall be

1.8 meters long. The pin assignments shall be listed as below:

PIN D-SUB Connector

1 Red Video

2 Green Video

3 Blue Video

4 NC

5 GND

6 GNC

7 GND

8 GND

9 +5V for DDC

10 GND

11 NC

12 SDA

13 H-sync

14 V-sync

15 SCL

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Connector pin assignments for HDMI cable

HDMI: 19 pins HDMI connector is designed to match with HDMI digital signal cable, the pin

assignment is as the following:

Pin Signal Assignment Pin Signal Assignment

1 TMDS RX2+ 11 TMDS Ground

2 TMDS Ground 12 TMDS Clock-

3 TMDS RX2- 13 CEC

4 TMDS RX1+ 14 Floating

5 TMDS Ground 15 DDC Clock

6 TMDS RX1- 16 DDC Data

7 TMDS RX0+ 17 Ground

8 TMDS Ground 18 +5V Power

9 TMDS RX0- 19 Hot Plug Detect

10 TMDS Clock+

Pin1

Pin2

Pin19

Pin18

ViewSonic Corporation Conﬁdential - Do Not Copy N3250w-1M

4. EXPLODED PARTS LIST ( N3250w-1M)

Item Ref. No. Part No. DESCRIPTION SPECIFICATION Q‘TY

1 1F01 2024267903 FRONT BEZEL ABS 94HB BLACK (VIEWSONIC) 1

2 1F02 2054256101 ORNAMENT ABS 94HB AL-PLATE 1

3 1F03 2033150500 IR COVER PC 476C 1

4 1F06 2044266501 FUNCTION KEY JC278 ABS 94V0 AL-PLATE POWER 1

5 1F12 2084730082 SCREW,BND T+ M3X8(BND T+) 4

6 1F22 2071972200 METAL FITTG SECC T=1.0MM FOR AU PANEL 1

7 1F23 2082740082 SCREW,BND+ M4X8(BND+) 6

8 1F25 2082740082 SCREW,BND+ M4X8(BND+) 2

9 1F26 2080003700 SCREW,SPE 1SZZTER001A M3*6L MSWR17/FZMY1 6

10 1F27 2080003700 SCREW,SPE 1SZZTER001A M3*6L MSWR17/FZMY1 4

11 1F28 2072050900 METAL FITTG-I/O SECC T=1.0MM FOR US 1

12 1F29 2082630042 SCREW M3*4 P=0.5 3

13 1F30 2072050701 METAL FITTG-I/O SECC T=1.0 FOR US+ROCKER SWITC 1

14 1F31 2082630042 SCREW M3*4 P=0.5 4

15 1F32 2083630068 SCREW FMS+ M3X6,M,S-TITE,F,NI 2

16 1F36 2027259702 DUST COVER ABS 94HB BLACK FOR US 1

17 1F37 2083730102 SCREW,BND T+ SCREW BND T+ 2

18 1F39 2080040062 SCREW,SPE M4*8 PMS-3/W 1

19 1F41 2071800300 BRACKET,FIX 62*8*3.4 T=0.5MM WITH PVC TUBE 1

20 1F50 2071972400 METAL FITTG SECC T=1.0MM VESA SUPPORT 1

21 1F51 2083630068 SCREW FMS+ M3X6,M,S-TITE,F,NI 4

22 1F52 2082630042 SCREW M3*4 P=0.5 14

23 1F54 2084740122 SCREW,BND T+ M4X12(BND T+) 4

24 1F55 2027259602 DUST COVER ABS 94HB BLACK 1

25 1F56 2044266601 FUNCTION KEY JC278 ABS 94V0 AL-PLATE FUNCTI 1

26 1F57 2084730082 SCREW,BND T+ M3X8(BND T+) 2

27 1F58 2082630062 SCREW M3X6 P=0.5 2

28 1F59 2084740082 SCREW,BND T+ M4X8(BND T+) 2

29 1F60 2071871400 BRACKET,FIX SECC T=2.0MM FIX ARM 1

30 1F61 2086240122 SCREW,P SW+ M4*12 PSW+ 2

31 1F62 2084740122 SCREW,BND T+ M4X12(BND T+) 6

32 1F70 2090106700 WASHER,METAL φ12xφ4.5x1.5t SECC 8

33 1F71 2084740122 SCREW,BND T+ M4X12(BND T+) 8

34 2C01 2022262902 CABI BACK ABS 94HB BLACK 1

35 2C12 2082740084 SCREW,BND+ BMS 4X8 BLACK 2

36 2C13 2084740124 SCREW,BND T+ M4X12(BND T+) (BLK) 2

37 2C14 2082340102 SCREW,CSK+ SCREW F M4X10 (CSK+) 6

38 2C15 2027259902 DUST COVER ABS 94HB BLACK 1

39 2C16 2027260002 DUST COVER ABS 94HB BLACK 1

40 2C17 2080005900 SCREW,SPE M6*10MM TYPE"I" BLACK ZN 6

41 5B01 2071870401 BRACKET,FIX JC278 BASE ALUMINUM BLACK 4001 1

42 5B02 2082750402 SCREW,BND+ M5X40,M,P,ZN-CC 4

43 5B03 2039802303 FOOT PAD VA520 CR420xφ16.5x5.8 BLACK 6

ViewSonic Model Number: VS10769-1M

ViewSonic Corporation Conﬁdential - Do Not Copy N3250w-1M

FIG.1

IR PCB ASS'Y

KEYPAD PCB ASS'Y

2C17

2C13

5B02

5B01

5B03

1F62

1F62 X3

1F61

1F28

W901

1F71 X4

1F70 X4

1F71 X4

1F70 X4

2C01

2C13

2C14X6

2C12

1F30

1F39

1F31

1F29

1F50

X14

1F52

1F51 X2

X21F51

POWER PCB ASS'Y

MAIN PCB ASS'Y

1F60

1F58 X2

1F06

1F12 X4

1F26 X6

1F27

1F22

V901

1F02

1F01

1F03

1F23 X3

1F23

1F25

1F56

1F57 X2

1F55

2C15

2C16

1F59 X2

1F54 X2

1F32

1F36

1F37

1F41

FIG.1

4.1. EXPLODED VIEW

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