ViewSonic N3250w-1L Manuel de service

Service Manual ViewSonic N3250w-1LModel No. VS11335-1L 32” LCD TV (N3250w-1L_SM Rev.1b_Aug.2008)ViewSonic® 381 Brea

Channel Add/Del. TV channel Add or Delete Parental TV program controlled by parents via password setting RCU Key function Power Soft power on or

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty876 E-D-0403-1779 2364503996P DIODE,ZENER SMD BZV55-C5V6 5% SOD-80C PHILI

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty956 N/A 2404301106P CONNECTOR JST PH 7P SIDE P=2.0 OR EQUAL P113 1957 N/A

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty1036 M-SCW-0824-6944 2084740124P SCREW,BND T+ M4X12(BND T+) (BLK) 2C13 210

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

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

3. Front Panel Function Control DescriptionFront View of the Product1 2 3 4 5687Volume DownDecrease sound volume or adjust a highlighted control while

Rear View of the ProductAnalog TV inputConnect to NTSC, PAL M/N TV source.S-Video inputConnect this port to the S-Video output of A/V device.AV/ S-Vid

Remote ControlViewSonic Corporation Confidential - Do Not Copy N3250w-1L 11

ENGLISH1 POWER Power ON/OFF2MTS Select Mono, Stereo or SAP in TV3INFO Display current information4SLEEP Set TV Sleep timer5SOUND Select sound modes60~

ENGLISHVideo Menu — Adjusting the picture qualityVideo Menu is active in all but the VGA input source. • Contrast: To adjust contrast of video. (right

ENGLISHTV Menu — To set up for TVIt is only active in TV source. • Tuner Mode: To select Cable or Air as the TV source. • Auto Scan: To auto scan the

ENGLISH When you enter this control, the screen below will be displayed. The factory default of the password is “0000”. To enable parental contr

ENGLISHPIP/POPPIP/POP button allows you to watch two screens from different sources at the same time. (PIP is picture in picture; POP is picture out o

Copyright Copyright© 2006 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, st

ENGLISH • PIP Size Select: Press P.SIZE to select the size of sub-screen. The function only acts on PIP. • PIP Position Select: Press P.POS to select

4. Circuit Description A. Analog Switch and Video input. MT8202 is a highly integrated video and audio single chip processor for emerging HDTV-Read

C. HDMI. MT8293 is fully HDMI-compliant receiver that fits directly into home theater products such as LCD TVs, plasma TVs an

MT8293 has 3 I2C interfaces. LCD Controller IC use the CSDL/CSDA interface to access MT8293 registers. MT8293 use KSDL/KSDA interface to read HDCP k

5. Adjusting Procedure 1. Function Test 1.1. Product - 32” LCD TV 1.2. Test Equipment -PC signal generator: CHROMA 2525 CARD ,CHROMA 2327 or 232

2.After adjusting, switch to FULL WHITE and check the value of each color. Preset color for N3250W-L x=0.283±0.015 y=0.298±0.015 3.Under

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 SOU

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

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

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 20.959

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 N3250W-L LCD TV with VGA Cable. (when key in DVI DDC inf

2.3.2 Choose model number then 2.3.3 Press “ENTER” key. ViewSonic Corporation Confidential - Do Not Copy

2.3.4 Press “F4” key. 2.3.5 Input barcode ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 31

2.3.6 Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED OK! 2.3.7 Exit program. ViewSonic Corpora

3. HDMI DDC Key In Procedure 3.1 Equipment Needed - N3250W-L LCD TV - PC - RS-232 cable - Barcode Reader - HDMI Cable N3250W-L

3.2.2 Barcode Reader connects with keyboard and PC keyboard port. 3.2.3 Connect DDC Card and N3250W-L LCD TV with HDMI Cable. 3.2.4 Connect Power Cor

3.3.2 Choose model number then . 3.3.3 Press “ENTER” key. ViewSonic Corporation Confidential - Do Not Copy

3.3.4 Input barcode 3.3.5 Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED OK! 3.3.6 Exit program. ViewSonic Cor

1. Appropriate Operation (1) Turn off the product before cleaning. (2) Use only a dry soft cloth when cleaning the LCD panel surface. (3) Use a

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 (Suggestio

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

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 sl

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

Rev: 1aItem ViewSonic P/N DESCRIPTION STATUS Ref. P/N Location Q'ty1 N3250W(L) monitor 12 P-00005968 Polyethy Bag Active 2013054007P POLYETHY BAG

Disassembly Procedure 1. Disassembly of Stand and Dust Cover from LCD TV. 1.1 Unscrew 4 screws that secure Stand Unit and detach Dust Cover from

2. Disassembly of Rear Cover. 2.1 Unscrew 16 screws to remove Rear Cover. 3. Disassembly of Main Board,Power Board,IR Board,Spea

3.2. Unscrew 9 screws to remove Dust Cover and METAL FITTG. METAL FITTG-I/O-Down METAL FITTG-I/O-Side DUST COV

3.3. Unscrew 5 screws and disconnect the wires to remove Main Board. 3.4. Unscrew 4 screws and disconnect the wires to remove Po

Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit. 5.2. Handling and Placing Methods Correct Methods: Incorrect

3.5. Unscrew 3 screws and disconnect the wires to remove KeyPad Board.

3.7. Unscrew 8 screws to remove Bracket.Fix. BRACKET,FIX 3.8. Unscrew 4 screws to remove IR Board. IR Board V

3.9. Unscrew 4 screws to remove Front Cover. 3.10. Lay Panel Unit facedown and unscrew 8 screws on its right,left,up and down sid

3.11.Unscrew 8 screws to remove Bracket.and Panel Unit. Panel Unit ViewSonic Corporation Confidential -

6. Trouble Shooting Flow Chart 6.1. NO VOICE TVCheck I112 Pin11 hasoutput signal?Replace I112Check I134 Pin3,13has output signal?Replace I134AV

6.2. NO POWER Chcek P1005V,12VCheck 3.3V is on C113?1.9V is on I102 Pin2?YesYesYesYesReplace I106& I107STARTCheck X100 is OK?Replace I101Replace

6.3. NO DISPLAY NTSCTVCheck Video wave form ison I112 Pin12 ?Replace I112CheckL221,R172,R173,C332,C334 is OK?Replace L221,R172R173,C332,or C334Check

Check HDMI Cable is wellconnected ?Connect the cableHDMINoCheck 27MHz is on Pin4 ofI115?Check I106NoCheck I114 is defective Replace I114YesCheck I115

7. Block Diagram ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 55

8.1. DC InputAUIO IN/OUT GND DIGITAL GNDUP3_4 High == > OPEN FRAME POWER OFFBack Light circuitInitial pull upDC INPUTPWR_GNDPWR_GNDGNDAPOWER_ENIAD

Place the monitor on a clean and soft foam pad. Placing the monitor on foreign objects. That could scratch the surface of the panel or cause “Mura”

8.2. DC TO DCPower ON alive sourceVFE_GND1VFE_GND1VFE_GNDLVDS_GNDDV18AASB18ASB18ADV33ASB18SB33AADCV18ALVDS_GNDVFE_GNDAV33ALVDS_GNDVFE_GNDLVDS_GNDAV1

8.3. MT8202MTK modifyPWM2VREFAOSDATA5A_DQ28TESTN2A_RA3GNDGPIO5IOA7A_DQ13DV18AAN0VGAHSYNC_1F_D[0..7]HDMIBCLKGNDTXD1ADC_IN3HDMIDEGPIO16SOY0CVBS0GNDA_D

8.4. MT8202 Analog DecouplingNORMAL ANALOG POWERNORMAL AUDIO ADC / DAC POWERSTANDBY ANALOG POWERNORMAL VIDEO ADC POWERNORMAL VIDEO DAC POWERLVDDAAUD

8.5. MT8202 DDR & FlashTSOP 48 pinVREF DECOUPLINGCLOSE TO 8202 PINVDDQ=1.215*((R1+R2)/R1); R1 CONNECTS TO GND.D_RA7D_DQS3A_DQ2D_CS_1IOCE_1A_RA1

8.6. MT8202 Digital DecouplingMT8202 DIGITAL POWER & DECOUPLINGSB18A5VSBSB18ADV18ADV33ASB33AC2930.1UC0603C2890.1UC0603C2883300PC0603C3010.1UC060

8.7. Audio/Video in CircuitFROM TunerFROM AV BOARDTHIS PAGE NEARLY ICTO MT8202AVPR0PAVPB0PVFE_GND1AVCVBS1TUMPX1PR0+Y0-VFE_GND1PR0-CVBS1AADCVSSMPX2MP

8.8. NTSC TunerMONOTUNER86FQ1216 : PALTUNERFQ1236 /F : NTSCADDRESSIFC2UP3_4, UP3_5 OPTION REMOVEN-MOSFETN-MOSFETTUMPX2AFAFTUMPX1TU_SCLTU

8.9. Analog Input InterfaceYPBPR AUDIO INS-VIDEO/AV INS-VIDEO/AV AUDIO INYPBPR/AV Input.YPBPR VIDEO INYPBPR/AV/SAUDIO Input.SVIDEO Input.AVSC0YPBPR

8.10. MT8293- HDMI InputNC if AVCC18 from regulatorV2I106拉到/Y25DATA2-HDMISD2GPIO18VI8VCC18HDMICENHDMIHSYNCVI14CCIR_GPIO_DIOVCC9993_SCLHDMICENVCC18XT

8.11. VGA source InputNEARLY VGA CON NEARLY ICVGA INVGASOGVGASCL_INGNDAVGAVSYNC_1GNDAGREEN-REDPCRXDVGAR_INVGA_PLUGPWRDLSW1REDRED-VGASCL_INVGASDA_INV

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

8.12. Audio SwitchS-VIDEO/AV AUDIO INYPBPR AUDIO INVGA AUDIO INAUSW1_2YPBPR0_LAV0SY0L_INYPBPR0L_INAUSW1_1YPBPR0_LAUINRVGAL_INYPBPR0L_INSW1S2VGA_RAV0

8.13. Audio ADCAUDIO ADCPULL DOWN FOR LJAOLRCKA_IN_LAUINLAOBCLKADCM0ADCVLADCM0AOLRCKADCM1ADCVLAUINRA_IN_RADCM1AOMCLKADCRST_1AOMCLKAOBCLKADCVLADINGND

8.14. Audio RCA OutputBYPASS AUDIO OUTPUTTO ERAPHONE OUTPUTTP02拉到ADDMTK modifyMTK modifyRCA JACK 1*2 layo共utARALGNDAAUDIO_OUT2_LAUDIO_OUT2_RGNDAOP1

8.15. Audio Amp.VDDSUBVDDLRHPLHP-SPKLBRALARBSLASRBSLBSRAAD8256_RSTAD8256_RSTAD8256_PDAD8256_DEFSRBSRASLASLBHP-SPKHPLHPRRBRALALBIOSCLAD8256_SDAAD8256

8.16. IR & Keypad InterfaceUP3_1GPIO12GPIO15IRRCVR1LED_GGPIO11UP3_0GPIO14GPIO16GPIO13LED_RGPIO10GPIO14GPIO13GPIO11UP3_0UP3_1GPIO10GPIO12GPIO16GP

8.17. Panel LVDS interfaceCHANGEAN[0..3]AP[0..3]LVDS_GNDGPIO2CLK1-CLK1+LVDS_GNDLVDS_GNDGPIO2LVDS_GNDAN2AP2LVDS_GNDCLK1-AN3AN0AN1AP3AP0CLK1+AP1GPIO2

8.18. System EEPROMSYSTEM EEPROMRESET# CircuitH : Normal DownloadL : Write Protect EEPROMSYSTEM EEPROMNEW USB DOWNLOAD I/FGPIO4SYSROMWPSCLSDADLSW2TX

8.19 Power boardViewSonic Corporation Confidential - Do Not Copy N3250w-1L 74

233 4123 412312161173 4122 33 41212 31 8.20 Power inverter boardViewSonic Corporation Confidential - Do Not Copy N3250

9.1. MAIN PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 769. PCB Layout Diagrams

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

9.2. MAIN PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 77

9.3. CON PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 78

9.4. CON PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 79

9.5. IR PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 80

9.6. IR PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 81

ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 8210. Exploded View And Exploded Parts List

ViewSonic Corporation Confidential - Do Not Copy N3250w-1L 83

ViewSonic Model Number: VS11335-1LRev: 1aSerial No. Prefix: QBAItem ViewSonic P/N Ref. P/N Q'ty1 N/A 2024267902P FRONT BEZEL 32AA ABS HB BLACK C

ViewSonic Model Number: VS11335-1LSerial No. Prefix: QBARev: 1eItem ECR/ECN ViewSonic P/N Ref. P/N Location Universal number#1 AC POWER CORD

ViewSonic Model Number: VS11335-1LRev: 1eSerial No. Prefix: QBAItem ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty1 N/A 23

Shall not result in permanent failure of power supply (including blown fuse) Power Consumption: Normal Normal: 150 W (Max) // Stand by: <

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty76 N/A 2341110296P CAP,CHIP 125'C CS 0603/COG/50V 1000p J T C447

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty156 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C79

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty236 N/A 2365807196P IC,LINEAR(SMD) AMC1117-3.3 SOT-223 ADD I148

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty316 E-Q-0402-1608 2360300896P XISTOR,NPN R SMD MMBT3904K SOT-23 FAIRCH

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty396 E-R-0405-6603 2253222096P RES CHIP 1/10W RC 0603 1/10W 22 ohm J

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty476 E-00003527 2253247396P RES CHIP 1/10W RC 0603 1/10W 47Kohm J T R

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty556 E-00003527 2253247396P RES CHIP 1/10W RC 0603 1/10W 47Kohm J T R

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty636 N/A 2336610613P CAP,MINI ELE 105'C EC 10u/ 50V 5*7 P=2.5 T

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty716 N/A 2346133296P CAP,CHIP 125'C CS 0603/X7R/50V 3300p K T C17

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty796 N/A 2346133296P CAP,CHIP 125'C CS 0603/X7R/50V 3300p K T C29