ViewSonic N3235w-1M Manuel de service

Service Manual ViewSonic N3235w-1MModel No. VS11770-1M 32” LCD TV (N3235w-1M_SM Rev. 1a Jun. 2007)ViewSonic® 381 Bre

Audio Language Audio Language Selections on English, Spanish, and French OSD Language OSD Menu Language Selections on English, Spanish, and French

* Reader’s Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products.

7. Mechanical The following table defines the mechanical specifications of this product for both chassis and cabinet. Parameter Specif

3. Front Panel Function Control DescriptionFront View of the Product1 2 3 4 567 8 9Volume DownDecrease sound volume or adjust a highlighted control wh

Rear View of the ProductSPDIF Optical outputConnect this port to the SPDIF input of A/V device.Cable/Air input jackConnect this port to RF/ CATV/ Digi

Remote ControlViewSonic Corporation Confidential - Do Not Copy N3235w-1M 11

ENGLISH1 POWER Power ON/OFF2MTS Select Mono, Stereo or SAP sound3INFO Display current information4SOUND Select sound modes5SLEEP Set timer to turn off

ENGLISHVideo Menu — To adjust the picture qualityIn TV, AV, S-Video, YPbPr, HDMI source: • Picture Mode: To select picture mode between User, Cinema,

ENGLISHAudio Menu — To set the audio quality and statusIn TV source: • Color Temperature: Press ENTER to select color temperature from User, Cool, Nor

ENGLISHIn AV, S-Video, YPbPr, HDMI, VGA source: • Balance: To adjust left and right audio balance. • Bass: To adjust bass. • Treble: To adjust the tre

ENGLISH • Channel Skip: Press ENTER to skip the channel. To restore the channel, press ENTER again. • Auto Scan: To auto scan the TV and DTV channels.

Copyright Copyright © 2007 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, s

ENGLISHIn VGA source: • OSD Language: To select an OSD language from English, Spanish or French. • Aspect Ratio: To select image size between No scale

ENGLISH • Close Caption: To set close caption options.＊Analog Close Caption: To set basic analog closed caption options. (CC1~CC4, TEXT1~TEXT4, Off)＊D

ENGLISHParental Menu — To set up Parental Control optionsIt is active in all input sources; however, when in AV, S-Video, YPbPr, HDMI, or VGAsource, t

ENGLISH • Program Block: To set TV and Movie Ratings.＊Rating Enable: Choose “On” to enable the below settings.＊U.S. TV Ratings: To adjust TV blocking

ENGLISH＊The Canadian English Ratings are defined as following.Use ENTER button to block or unblock the ratings, and use MENU to exit.＊Canadian English

ENGLISH • Input Block: To set the input source to be blocked. Users will not be able to watch the content coming from the blocked input source.Use ENT

4. Circuit Description A. Analog Switch and Video input. The MT5371 is a complete backend hardware and software solution. It consists of a DTV backe

C. DTV and HDMI. MT5112 is a fully integrated single-chip 8-VSB and 64/256-QAM demodulator. The chip is designe

bandwidths up to 150 MHz and video resolutions up to 1080p and WXGA. The built-in High-bandwidth Digital Content Protection (HDCP) decryptio

de-emphasis function. The IC YDA138 is a class-D amplifier that can be output power of 10Watts per channel on a 6-ohm load speaker wh

TABLE OF CONTENTS 1. Precautions and Safety Notices... 13. Front Panel Function Control

1. Function Test 1.1. Product - 32” LCD TV 1.2. Test Equipment -PC signal generator: CHROMA 2525 CARD ,CHROMA 2327 or 2329,Pioneer DV-S969AVi. -T

Preset color for N3235WM x=0.283±0.015 y=0.298±0.015 1.4.3 Power Consumption Check ( VGA MODE ) A. TIMING: 1360 x 768@60Hz B. Pattern: 1010

You should do “All Mode Reset” again. Turn off the LCD TV by pressing “Power” button. TV Frequency Table: U.S.A Channel (TABLE 1) VIF 45.75 MHz, SI

U.S.A. CATV (TABLE 2) VIF 45.75 MHz, SIF 41.25 MHz (Unit：MHz) Ch. Freq.range fp (picture)

1.5. TV receiving test: 1.5.1 TV SIGNAL TEST ITEM CENTRALISM TRANSMITTING SIGNAL CHECK CONTENT SET CONTENT CHANNEL ORDER FREQUENCY (MHz) PATTERN SO

TIMING TABLE (FACTORY PRESET MODE) (TABLE 3) ITEM 1 2 3 4 TIMING 640*480@60HZ 640 *480@75HZ 800 *600@60HZ 800*600@75HZPixel Rate 25.175MHZ 3

TIMING TABLE (FACTORY PRESET MODE) (TABLE 3) ITEM 9 10 11 12 TIMING 1360 ×768 60HZ 1280 ×1024 60HZ Pixel Rate 85.5MHZ 108MHZ H TOTAL 20.9

2. VGA DDC Key In Procedure Note: 1. Every time after replacing the main board, you have to do the DDC key in. 2. If you find the DDC does not confo

2.2.2 Barcode Reader connects with keyboard and PC keyboard port. 2.2.3 Connect DDC Card and N3235WM LCD TV with VGA Cable. (when key in DVI DDC info

2.3.3 Press “ENTER” key. 2.3.4 Press “F4” key and Input bar code ViewSonic Corporation Confidential - Do

1. Precautions and Safety Notices 1. Appropriate Operation (1) Turn off the product before cleaning. (2) Use only a dry soft cloth when cleaning

2.3.5 Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED OK! 2.3.6 Exit program. ViewSonic

3. HDMI DDC Key In Procedure There are three EDID files for the different HDMI connectors. So you must be download the different EDID into each HDMI

3.2.2 Barcode Reader connects with keyboard and PC keyboard port. 3.2.3 Connect DDC Card and N3235WM LCD TV with HDMI Cable. 3.2.4 Connect Powe

3.3.3 Press “ENTER” key. 3.3.4 Press “F4” key. ViewSonic Corporation Confidential - Do Not Copy N3235w-1M

3.3.5 Input bar code 3.3.6 Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED OK!

4. Firmware Upgrade Procedure When you receive the returned LCD TV, please check whether the firmware version is the latest. If not, please do the f

4.5.2 Select COM port. Depends on the COM port assigned in System Device Manager (Refer below right). 4.5.3 Select Baud Rate. 115200x 8 (Sugge

4.5.4 Enable the USB Bridge. 4.5.5 Browsing the File to download. ViewSonic Corporation Confidential -

4.5.6 Press Upgrade to download file. Note : 1. The Baud Rate is auto setting if mismatch found between your platform and Mtktool. 2. You can s

Packing For Shipping And Disassembly Procedure Packing For Shipping 1. Packing Procedure 1.1 Paste protection film to protect the LCD TV. (Figure 1)

5.2. Handling and Placing Methods Correct Methods: Incorrect Methods: Only touch the metal frame of the LCD panel or the front cover of the moni

ViewSonic Model Number: VS11770-1MRev: 1aItem ViewSonic P/N Ref. P/N Location Q'ty1 N3235WM monitor 12 P-00005968 2013054007P POLYETHY BAG 13 P

Disassembly Procedure 1. Disassembly of Rear Cover from LCD TV. 1.1 Unscrew 9 screws to remove Rear Cover.

2.2 Unscrew 14 screws to remove Shield Plate. 2.2. Unscrew 8 screws to remove METAL FITTG-I/O-Down. Shield Plate

2.3. Unscrew 3 screws to remove METAL FITTG-I/O-Side 2.4. Unscrew 4 screws and disconnect the wires to remove Main Board.

2.5. Unscrew 4 screws and disconnect the wires to remove Power Board. 2.6. Unscrew 3 screws and disconnect the wires to remove KeyP

2.7. Unscrew 2 screws to remove Switch Board. 2.8. Unscrew 5 screws to remove Front Cover. Front Cover ViewSonic C

2.9. Unscrew 4 screws to remove Panel Bracket. 2.9. Unscrew 6 screws to remove Panel Unit. Panel Unit Panel BracketViewSon

6. Trouble Shooting Flow Chart 6.1. NO POWER STARTReplace PowermoduleNOYESNONOYESYESYESCheck P101 5V,12VCheck WireConnection onpower module isOK?Ch

6.2. NO VOICE NOYESCheck I114 Pin24has output signal?Check WireConnection onpower module isOK?TVNOCheck I116 I2Ssignal output toI124?Replace I116Check

Check Video wave form is on I114 Pin25?Replace PanelNTSC TVCheck C178,R140,C177 is OK?Check I116 has outputsignal atPin9,10,13,14,17,18,21,22,25,26 o

ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 3

NOYESCheck +30V onPin13 +5V on Pin21of I114?ReplaceI106,I127 orI111DTVCheck I115 hasoutput signal atRN01~RN03Check X101 has25MHz clock outputYESNO

7. Block DiagramMT537xMT8291(Audio Codec)YDA138(Audio Amp.)LCD ModuleAV(CVBS)S-VideoYPbPrAV/SV Audio(RCAR/L)PC/DVI Audio(mini jack)YPbPr Audio(RCAR/L)

8.1. DC POWER INPUT0.8 x (1+1K/1K) = 1.6VPOWER SUPPLY +1V8 FOR MT5112POWER SUPPLY +5V FOR TUNERGLOBAL POWER1.25 x (1+180/110) = 3.3VSTANDBY POWER +3V

8.2. TUNER AND DEMOD.TUNER - ANALOG OUTPUTROUTE SYMMETRICALLYClose to TunerNTSC CVBSSIF (4.5MHz)NEARLY TUNER NEARLY MT5372NEARLY MT5372NEARLY TUNERS

8.3. MT537x ASICANALOG FRONT-END POWERVIDEO DAC POWERPLL POWERGLOBAL POWERLVDS POWERHDMI POWERTS INPUTNOR FLASHJTAGDDR SIGNALAV / SV VIDEO INPUTYPBP

8.4. MT537x BYPASS CAP.LVDS POWERVIDEO DAC POWERPLL POWERPLL POWERLVDS POWERVIDEO DAC POWERGLOBAL POWERANALOG FRONT-END POWERTOP SIDE BOTTOM SIDELEF

8.5. MT537x PERIPHERALNOR FLASHNOR FLASHJTAGJTAG INTERFACEFOR CODE DOWNLOAD AND DEBUGGINGOPTICALSPDIF CIRCUITTRAP-MODE CIRCUITMT537x SYSTEM EEPROMGE

8.6. DDR1 MEMORYBYPASS CAP. FOR TERMINATOR(EVERY 2 RESISTOR PUT 1 BYPASS CAP.)DDR#1DDR MEMORYMEM_ADDR6MEM_ADDR5MEM_ADDR4MEM_DQ0MEM_ADDR6MEM_ADDR5MEM

8.7. AV / SV / YPBPR INPUTYPBPR AUDIO INPUTYPBPR VIDEO INPUTNEARLY YPBPR CONNECTOR NEARLY MT5372NEARLY AV/SV CONNECTOR NEARLY MT5372SVIDEO Input.Aud

8.8. VGA INPUTVGA AUDIO INPUTNEARLY VGA CONNECTOR NEARLY MT5372VGA VIDEO INPUTGPIO_8RED_GNDGRN_GNDREDGRNBLU_GNDBLUVGA_VSYNCVGA_HSYNCVGASCL_INVGASDA_

Parameter Specification LCD Type a-Si TFT Active Matrix Wide Color, Transmissive Mode, Normally Black LCD Interface 1-Channel LVDS Resolution (Nati

8.9. HDMI INPUTHDMI EDID EEPROMSIF INTERFACEHDMI VIDEO INPUTGPIO DEPEND-ON YOUR APPLICATIONWORKABLE IN NORMAL MODE ONLYHDMIDDCSCLHDMIDDCWP0HDMIDDCSD

8.10. AUDIO CODEC AND LINE OUTAUDIO L/R OUTPUTMUTE CIRCUITOPCTRL7=" L": Normal OperationOPCTRL7=" H": MuteTWO WIRE SERIAL CONTRO

8.11. AUDIO AMPLIFIER2006/02/15_modifiedGain 24dBL,L H,H36dBL,H18dB30dBH,LVOL[1:0]AO1AUXLAO1AUXRMUTEHPDETMUTECMUTEAO1AUXRAO1AUXLHPDETGND+12V+5VSBAmp

8.12. LVDS OUTPUTLVDS SIGNALOPCTRL5="L" : LVDS Power ONOPCTRL5="H" : LVDS Power Off2007-02-28 Modify+12VGNDA0PA0NA1PA1NCK1PCK1NA

8.13. IR AND KEYPAD INTERFACELED & IROPCTRL1OPCTRL2GPIO_71GPIO_72GPIO_73GPIO_74OPCTRL3PowerEnter / SourceCH UpCH DownMenu / ExitVOL IncVOL DecOP

9.1. MAIN PCB TOP VIEW 9. PCB Layout Diagrams ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 72

9.2. MAIN PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 73

9.3. CON PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 74

9.4. CON PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 75

9.5. IR PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 76

2. Video Built-in A/D converter shall provide analog to digital converter for this product. Input Parameter Specification CVBS Characteristi

9.6. IR PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 77

9.7. P-BUTTON PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 78

9.8. P-BUTTON PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 79

10. Exploded View And Exploded Parts List ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 80

ViewSonic Corporation Confidential - Do Not Copy N3235w-1M 81

ViewSonic Model Number: VS11770-1MRev: 1aSerial No. Prefix: QNFItem ViewSonic P/N Ref. P/N Q'ty1 N/A 2024278003PFRONT BEZEL 32R ABS HB G.L BLA

Rev: 1aSerial No. Prefix: QNFItem ECR/ECN ViewSonic P/N Ref. P/N Location Universal number#1 AC Power Cord A-00005362 2427130046P P9512Remote Control

ViewSonic Model Number: VS11770-1MRev: 1aSerial No. Prefix: QNFItem ViewSonic P/N Ref. P/N Location Universal number# Q'ty1 E-00008342 2346110496

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription79 N/A 2341110296P CS 0603/COG/50V 1000p J T CAP CHIP TEMPERATURE 125&

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription162 N/A 2364600496P-01 MM4148 SOD80C GRANDE DIODE,SWITCH SMD D153

fuse) Power Consumption: Normal Normal: 180 W (Max) // Stand by: < 3 W Interference with RF and Video There shall be no visible interfere

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription245 E-00003533 2379520196P Z= 200 ohm 0805 I=2.0A BEAD,HI-CURRENT L158 12

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription328 E-R-0405-6411 2253210396P RC 0603 1/10W 10Kohm J T RES CHIP 1/10W

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription411 E-R-0405-6411 2253210396P RC 0603 1/10W 10Kohm J T RES CHIP 1/10W

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription494 N/A 2336310713P EC 100u/ 16V 6.3*7 P=2.5 T CAP MINI ELE 105'C

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription577 E-00008342 2346110496P CS 0603/X7R/50V 0.1u K T CAP CHIP C196 157

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription660 E-00008342 2346110496P CS 0603/X7R/50V 0.1u K T CAP CHIP C327 166

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription743 N/A 2364600496P-01 MM4148 SOD80C GRANDE DIODE,SWITCH SMD D117

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription826 E-R-0405-6409 2253210196P RC 0603 1/10W 100 ohm J T RES CHIP 1/10W

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription909 N/A 2301333491P MEB 0.33u/ 63V P=5.0 J T CAP MEB C474 1910 N/A 23

Item ViewSonic P/N Ref. P/N Location Universal number# Q'tyDescription992 HW-00008057 2071800300P 62*8*3.4 T=0.5MM WITH PVC TUBE BRACKET FIX 1F41