ViewSonic N4251w-1M Service Manual
  1. Manuals
  2. Brands
  3. ViewSonic Manuals
  4. LCD TV
  5. N4251w-1M
  6. Service manual
ViewSonic N4251w-1M Service Manual

ViewSonic N4251w-1M Service Manual

42” lcd tv
Hide thumbs
Table of Contents

Advertisement

Quick Links

Service Manual

ViewSonic N4251w-1M
Model No. VS11502-1M
42" LCD TV
(N4251w-1M_SM Rev. 1b Jul. 2007)
®
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Advertisement

Table of Contents
loading

Related Manuals for ViewSonic N4251w-1M

Summary of Contents for ViewSonic N4251w-1M

  • Page 1: Service Manual

    Service Manual ViewSonic N4251w-1M Model No. VS11502-1M 42” LCD TV (N4251w-1M_SM Rev. 1b Jul. 2007) ® ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...

  • Page 2: Revision History

    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.

  • Page 3: Table Of Contents

    5. Adjustment Procedure ................23 6. Trouble Shooting Flow Chart..............51 7. Block Diagram .....................55 8. Schematic Diagrams..................56 9. PCB Layout Diagrams .................82 10. Exploded Diagram And Exploded Parts List...........90 11. Recommend Spare Parts List..............93 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 4: Precautions And Safety Notices

    (13) Small amount of materials having no flammability grade is used in the LCD module. The LCD module should be supplied by power complied with requirements of Limited Power Source (IEC60950 or UL1950), or be applied exemption. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 5 Do not touch and that may cause “Mura” the surface of the polarizer. Take out the monitor with cushions Taking out the monitor by grasping the LCD panel. That may cause “Mura” ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 6: Specification

    Video Amplitude Signal DC Level Sync Pulse Typical. 0.35 V Audio Characteristics: AF Output Level Measured via LP 20 kHz Typical. 0.35Vrms Filter, RMS Decoder, 75us De-emphasis 10% (max.) 44 dB (min.) ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 7 +/- 3 db (at 1KHz @1W) +/- 3 db (at 1KHz @1W) (100Hz ~ 10KHz) Total Harmonic Distortion (1KHz @1W) Signal to Noise (1KHz @1W) 30 dB (40Hz to 15KHz) 40dB(400Hz to 20 kHz) ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 8 5. Firmware & OSD The product firmware of VS11502 shall have a firmware version of 1.00 Any changes/revisions afterward shall also be pre-approved by ViewSonic in written. For VS11405-1M, its firmware shall have a built-in frequency table for implementation. All audio/video and other output adjustments shall be performed by using an On Screen Display (OSD) via a Remote Control Unit (RCU) in conjunction with the front panel adjustments.
  • Page 9 Texts Printed on Key Pads – White Color (Refer to standard) Color For the shortcut keys of Teletext: Red Key – Pantone 185U Blue Key – Pantone 285U Green Key – Pantone 335U Yellow Key – Pantone 108U ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 10 Molded Plastic Workmanship shall be inspected according to ViewSonic Molded Plastic Parts Specification, VSCMPPSPEC001V1.2. Screen Printed Parts, Bird Logo Artwork shall be provided and confirmed by ViewSonic. Recess Rear Label A label identifying the product name, model/serial number and FCC ID/Logo shall be placed into the rear label recess located on the rear panel of the chassis.

  • Page 11: Front Panel Function Control Description

    VOL+ and MENU buttons again to unlock it. 2. Press VOL- and VOL+ buttons at the same time to lock OSD menu, and press VOL- and VOL+ buttons again to unlock it. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 12: Rear View Of The Product

    Connect this port to your A/V device with audio in (RCA) connectors or to audio amplifier. PC Audio input Connect this port to PC line out jack. Headphone Jack Connect this port to your headphone. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 13: Remote Control

    Remote Control ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 14 II button = freeze picture S DISPLAY Display current information Note: PIP means Picture In Picture. * This feature may not be supported under all models. ** For use on other device. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 15: Osd Functions

    Note: To adjust the above controls in the Audio settings, Smart Sound Mode must be set to “User”. • Smart Sound Mode: To select sound mode between User, Rock, POP, Live, Dance, Techno, Classic, and Soft. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 16 Channel Lock: To lock channels. Use ◄► to select the channel you want to lock, and then press ENTER to lock or unlock it. Change Password: To change the password, press ENTER and enter the password again. Press ENTER, and the following screen appears. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 17 Restricted Parental guidance suggested NC-17 No one 17 and under limited PG-13 Parents strongly cautioned Adult audience only Use ENTER button to block or unblock the ratings, and use MENU to exit. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 18 Use ENTER button to block or unblock the ratings, and use MENU to exit. • Canadian French Rating: To adjust blocking level in French-speaking region of Canada. You can select between CF_E, CF_G, CF_8ANS, CF_13ANS, CF_16ANS, and CF_18ANS. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 19 OK and then press ENTER to complete and save the channel name. To cancel editing, choose Cancel or exit without pressing OK. Note: When input source is DTV, “Channel Name” will not appear on the TV Menu. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 20 • Manual Clock: To adjust the horizontal pixel clock of the video. • H. Position: To adjust the horizontal position of the picture. • V. Position: To adjust the vertical position of the picture. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 21 PIP. Note that the screen indexed with the pink frame is the screen you select to set up. Use ◄► to move the index between the main screen and the sub-screen. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 22: Circuit Description

    MT8202 supports alpha blending for Video and two OSD planes. It also supports 10bit gamma correction and advanced dithering processing for LCD display with 6/8/10 bit output. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 23 PES, analyzing the PES header, and transferring the PES to the audio and video decoders. MT8293 is fully HDMI-compliant receiver that fits directly into home theater products such as LCD TVs, plasma TVs and HDTVs. The receiver is capable of supporting bandwidths up to ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 24 Digital video signals are directly output from the MT5351AG and MT8293 and then transfer them to the MT8202 for advanced processing. SDRAM FLASH SDRAM MT8202 ATSC RF MT5112 MT6351 TUNER (Demod.) (Mpegdecoder) MT8293 HDMI (HDMI Bx) ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 25 Digital audio, such as HDMI and DTV, have decoded by MT5351 and MT8293, is converted to I2S digital audio already. The I2S digital audio data is decoded and processed by MT8202, and then be delivered to AD8256 for audio amplifying. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 26 BALANCE and press ENTER, The color warm will auto adjust. The act of EHITE BALANCEL is completed when the picture is steady. 2.After adjusting, switch to FULL WHITE and check the value of each color. Preset color for N4251W(1M) x=0.283±0.015 y=0.297±0.015 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 27 G. AUDIO OUT FUNCTION TEST: Under all patterns except PC pattern, The Audio output meets active extra speaker, examines whether the extra speaker makes the sound. 1.4.10 EARPHONE FUNCTION TEST Under PC MODE, input PC AUDIO signal, determines whether the action of INT ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 28 613.75 655.00 614 – 620 615.25 619.75 661.00 621.25 620 – 626 625.75 667.00 626 – 632 627.25 673.00 631.75 632 – 638 633.25 637.75 679.00 639 – 644 639.25 643.75 685.00 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 29 635.75 677.00 336 – 342 337.25 383.00 636 – 642 637.25 693.00 341.75 641.75 342 – 348 343.25 347.75 389.00 642 – 648 643.25 647.75 689.00 348 – 354 349.25 353.75 395.00 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 30 B.CHANNEL36: Check whether the color of the color bar is normal. C.CHANNEL69: Turn RF attenuator and check the critical point of the change of the image’s S/N is under LEVEL<45~85> dBu, regards as normally. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 31 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 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 32 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 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 33 DDC Card RS-232 cable Barcode Reader VGA Cable N4251W(1M) LCD TV DDC Card RS-232 Cable VGA Cable Barcode Reader 2.2 Setup Procedure 2.2.1 Connect VGA Card and DDC Card with RS-232 cable. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 34 (when key in DVI DDC information, use VGA transform to DVI port ) 2.2.4 Connect Power Cord to N4251W(1M) LCD TV. 2.3 DDC Key In Procedure 2.3.1Run DDC exe 2.3.2 Choose model number then ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 35 2.3.3 Press “ENTER” key. 2.3.4 Input bar code 2.3.5 Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED OK! 2.3.6 Exit program. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 36 3.1 Equipment Needed N4251W(1M) LCD TV RS-232 cable Barcode Reader HDMI Cable N4251W(1M) LCD TV RS-232 Cable HDMI Cable Barcode Reader 3.2 Setup Procedure 3.2.1Connect HDMI Card and DDC Card with RS-232 cable. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 37 3.2.3 Connect DDC Card and N4251W(1M) LCD TV with HDMI Cable. 3.2.4 Connect Power Cord to N4251W(1M) LCD TV. 3.3 DDC Key In Procedure 3.3.1 Run DDC.exe 3.3.2 Choose model number then ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 38 3.3.3 Press “ENTER” key. 3.3.4 Input bar code 3.3.5 Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED 3.3.6 Exit program. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 39 4.4 Execute the Mtktool to start download the file. The Mtktool program will be upgraded if necessary. "MtkTool Auto BaudRate.exe" 4.5 The Mtktool Operat 4.5.1 Select Platform : MT8105 , MT1389 ,MT8202 or MT8205. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 40 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 (Suggestion) ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 41 4.5.4 Enable the USB Bridge. 4.5.5 Browsing the File to download. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 42 2. You can slow down the baud rate if some Flash memory can not works properly in high-speed download. 3. Please call the MediaTek contact window if any problem found like unsupported Flash Type or fail to download. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 43: Packing For Shipping And Disassembly Procedure

    1.4 Place the LCD TV into the carton. At last, close the carton and seal it with tape. (Figure 4) 1.Power Cord 2.VGA Cable 3.F/F Cable 4.RCA Cable 5.User’s Guide 6.Remote contrl 7.Guarant Card 8.Battery Figure 3 Figure 4 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 44 PACKING PART LIST ( N4251w-1 ) ViewSonic Model Number: VS11502-1M Rev: 1a Item ViewSonic P/N Ref. P/N Description Q'ty N4251W(1M) monitor P-00008063 2013054045P POLYETHY BAG P-00008104 2012196600P POLYFOAM (T.L) P-00008105 2012196700P POLYFOAM (T.R) P-00008106 2012196800P POLYFOAM(B.L) P-00008107 2012196900P POLYFOAM(B.R) P-00008064...
  • Page 45 1.1 Unscrew 4 screws that secure Stand Unit and detach Dust Cover from the LCD TV. Stand 2. Disassembly of Rear Cover. 2.1 Pull the Holder from the LCD TV. 2.2 Unscrew 23 screws in the Rear Cover ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 46 2.3 Prize the rectangle hole on Rear Cover (Fig.1) with a screwdriver(Fig.2) to make the Rear Cover detach from the LCD TV. Fig.1 Fig.2 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 47 Rear Cover 3. Disassembly of Main Board,Power Board,IR Board,Speaker,Front Cover and Panel Unit. 3.1 Unscrew 24 screws to remove Shield Plate. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 48 3.2. Unscrew 4 screws to remove speaker. Speaker ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 49 3.3. Remove the function key ass’y. 3.4. Unscrew 18 screws to remove Front Cover and Bracket Fix. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 50 Bracket,fix 3.5. Unscrew 17 screws to remove metal fiting vesa support. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 51 3.6. Unscrew 13 screws and disconnect the wires to remove Main Board. Main Board 3.7. Unscrew 4 screws and disconnect the wires to remove Power Board. Power Board ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 52 3.8. Unscrew 5 screws to remove metal fiting-io. 3.9. Lay Panel Unit facedown and unscrew 18 screws on its right,left,up and down sides, to remove Panel Unit and Panel Bracket. ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 53 Panel Unit ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 54: Trouble Shooting Flow Chart

    Replace I106 Replace I135 signal output to I145? defective? Check I136 is Replace I136 defective? Check Pin37 of I145 is Check Earphone high? circuit Check I145 is Replace I145 defective? Check Speaker Wire ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 55 OK? Check 3.3V is on C113? Replace I101 1.9V is on I102 Pin2? Replace I102 Check IR Board Replace IR Board Check X100 is OK? Replace x100 Replace I106 & I107 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 56 NTSC YPb Pr S-VIDEO Check Check Video wave form is Replace L816,R172 Check L819,R197,C340 is Replace L819,R197 or Replace I804 L816,R172,R173,C332,C33 on I804 Pin21 ? R173,C332,or C334 C340 4 is OK? Check Q802,C886 is OK? Replace Q802 or C886 Check L821,R203,C335 is Replace L821,R203, or C335 Check I106 has output...
  • Page 57 RP32~RP41? Pin19~22 of P114 ? Check the LVDS wire from Replace LVDS Wire P803 to panel is OK? Check inverter wire from power board to panel is Replace Inverter Wire Replace Panel ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

  • Page 58: Block Diagram

    7. Block Diagram SDRAM Flash SDRAM CABLE SPDIF (Optical) SWIT CH MT5351 (Mpeg MT5112 decoder) (Demod.) LCD Module COMBO T uner NT SC HDM I 1 HDMI MT8293 MT8202 HDM I 2 Flash SWITCH (HDMI HDM I 3 AV(CVBS) S-Video2 SDRAM YPbPr SDRAM...

  • Page 59: Schematic Diagrams

    L236 MMBT3904 Back Light circuit C806 C105 0.1U PWR_ON_OFF 3 1000U/16V/LowESR 2.0MM GNDP GNDP GNDP GNDA PWR_GND PWR_GND AUIO IN/OUT GND DIGITAL GND PWM0 PWM0 PWM1 PWM1 BACK_LIGHT PWM TURN OFF SIGNALS ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 60 L111 AV33A 100U/16V 0.1U R121/0603 3A LVDS_GND C130 47U/16V LVDS_GND I105 C131 C133 100U/16V C132 220U/16V C134 0.1U 0.1U AP1084K33 +3.3V Regulator TO-263 LVDS_GND LVDS_GND 3,5,25 VFE_GND VFE_GND 3,5,8,22 VFE_GND1 VFE_GND1 3,5,8,22 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 61 LVDS DATA TP01 TP26 TP29 TP27 TP36 TP33 TP34 TP35 SB33A SB33B SB18A DV18A DV33A TP37 GPIO5 TXD1 R118 R119 GPIO6 RXD1 TP38 SB33A SB33B SB18A DV18A DV33A VFE_GND UTXD RXD1 URXD TXD1 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 62 CLOSE TO 8202 PIN C210 C211 C212 R240 C195 C192 DV25A 100U/16V 0.1U C213 100K/1% C193 47uF/16v C194 1000U/16V 4.7u/16v 0805 220uF/16v AMC7585-2.5V/TO252 10U/16V/Y5V C222 C223 OTHER CAP DDR BITTOM SIDE. 100U/16V 0.1UF CE025063 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 63 4.7U 0.1U MTK modify C0603 ADCV33A VFE_GND L123 47uH ADACVDD VFE_GND L124 R60/0603 300mA AVDD_VAD1 0.45mm C280 C282 C281 C283 C284 C285 10U/50V 100U/16V 0.1U 4.7U 0.1U C0603 C0603 AUDIO_GND VFE_GND AUDIO_GND ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 64 3300P C0603 C0603 C0603 DV33A C296 C297 C298 5VSB 3300P 3300P 3300P C0603 C0603 C0603 C300 C301 C302 C303 100U/16V 0.1U 0.1U 0.1U C304 C305 C306 0.1U 0.1U 0.1U C0603 C0603 C0603 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 65 NS/75 R820 R0603/SMD R853 100uF/16v ADC_IN3 100K C100UF16V/D6H5 R0603/SMD R0603/SMD R821 NTSC CVBS 220K R0603/SMD C822 R823 C823 TUMPX1 10nF 10nF R824 C0603/SMD R0603/SMD C824 C0603/SMD 4.7K 15pF R0603/SMD C0603/SMD SIF (4.5MHz) ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 66 R179 C344 0.047U TUMPX1 AVPR0P R180 C345 0.01U PR0+ C346 330P FROM AV BOARD C347 VFE_GND1 AVPR0N R181 C348 0.01U PR0- AADCVSS AADCVSS 3,5,21,22 VFE_GND1 VFE_GND1 2,3,5,22 FROM Tuner TUMPX1 C349 MPX1 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 67 AV0SY0R_IN 19 S-VIDEO/AV AUDIO IN SY0_GND R536 SVIDEO Input. SY0_IN P103 SC0_IN L820 2.2uH R200 AVSC0 SC0_IN D809 R201 SY0_GND SC0_GND R537 S_TERMINAL1 AV0_IN L821 2.2uH R203 AVCVBS1 D810 R204 AV0_GND R538 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 68 (NC)1M AVCC SOT23 L147 R60/0603 300mA AVCC18 C410 C411 X101 R60/0603 300mA 0.1U 0.01U XTLI XTLO R227 (NC)0 (NC)27MHz XTAL C412 C413 Q109 (NC)18P (NC)18P DDC_SDA 9993_SDA MOSFET N 2SK2158 SOT23 AVCC ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 69 HDMI_SRC1_SCL C865 HDMI_SRC1_SDA C866 C867 C868 C869 C870 C871 C872 C873 C874 C875 C876 C877 0.1U R866 100 0.01U 0.01u 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 100uF/16V 24C22/SMD/DIP ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 70 HDMI AUDIO DV18 POWER +1V8 MT5112 POWER DV33 POWER +3V3 MT5351 POWER DIGITAL OUTPUT AV33 POWER +3V3 MT5351 ANALOG POWER DV25 POWER +2V5 MT5351 DDR POWER DV12 POWER +1V2 MT5351 POWER GROUND GROUND ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 71 C859 C860 AVDD33 ADVDD33_2 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF BEAD/SMD/0805 C855 C861 L814 10uF/50v 0.1uF C0603/SMD C0603/SMD C0603/SMD C0603/SMD C0603/SMD C10UF16V/D5H11 C0603/SMD R60/0603 300mA C862 Analog 3.3V Bypass Caps BEAD/SMD/0603 0.1uF C0603/SMD ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 72 11.5K1% 15,18 DV12 Regulator AP1522 SOT23-5/SMD R0603 7,12,13,15,16,17,18 POWER SUPPLY +3V3 FOR MT5351 Vout = 1.25 x ( 1 + Rb / Ra ) GLOBAL SIGNAL POWER SUPPLY +30V FOR SAMSUNG TUNER ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 73 VOPCLK VOPCLK VOHSYNC VOHSYNC VOVSYNC VOVSYNC VODE VODE DIGITAL VIDEO OUTPUT 5VDD ATSC AUDIO ONLY L198 R121/0603 3A C743 0.1U OPTICAL MT5351 BGA471/SMD/SOCKET ASPDIF R493 DV25 SPDIF CIRCUIT P116 S/PDIF OUT RCA/SPDIF/DIP ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 74 C538 C539 C540 C541 C542 C543 C544 C545 100U/16V 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U CE025063 C0603 C0603 C0603 C0603 C0603 C0603 C0603 C0603 FOR DDR#2 BYPASS CAP. FOR DDR ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 75 TP75 TP/SMD/D0.6 JTMS JTMS TP/SMD/D0.6 TP76 SOFTWARE DEBUG PORT JTCK JTCK TP/SMD/D0.6 TP77 JRTCK JRTCK TP/SMD/D0.6 TP78 DV33 JTDO JTDO TP/SMD/D0.6 R309 R310 4.7K 4.7K R0603 R0603 U2RX U2TX FOR SOFTWARE LINK ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 76 ANALOG PART R317 R318 0.1U 4.7K 4.7K C0603 R0603 R0603 MEM_VREF MEM_VREF AVDD_APLL0 RVREF RVREF OPWM0 C607 OPWM0 OSDA0 R319 OSDA_MST 0.1U C0603 OXTALI OXTALI R0603 VCXO0 VCXO0 OSCL0 R320 OSCL_MST R0603 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 77 VGA_L VGAR_IN VGA_R SG_12V R363 R364 L232 SG_12V C633 0.1U C0603 R121/0805 6A I134 YPBPR0_R VGA_R VGA_L AUINR AV0SY0_L AUINL AV0SY0_R YPBPR0_L SW1S1 SW1S2 HEF4052-12V SOP16 AUSW1_1 R365 GPIO7 AUSW1_2 R366 GPIO9 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 78 ADCVL C653 C652 SDOUT 47U/16V A_IN_R 0.1U DV33B AINR ADCVL AOBCLK R390 A_IN_L SCLK AINL AOLRCK R391 ADCRST_1 GNDA LRCK RST# C654 C655 AD12250 0.1U R392 TSSOP16 PULL DOWN FOR LJ (NC)10K ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 79 AU2AVR AUDIO_OUT2_R R430 L188 R121/0603 3A R525 (NC)0 C748 (NC)100U/16V VIDEO_OUT C692 C693 1000P 1000P R497 R498 R499 (NC)10K (NC)220 GNDA D141 (NC)1K (NC)5.6V AUDIO OUT RL RCA JACK 1*2 layo ut ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 80 L176 VGAVSYNC_1 C622 CVCK VCLK R347 D134 C623 VGASCL C624 100P (NC)5.6V 0.01U 100K VGASDA L178 R348 C625 R121/0603 3A 5.6V 0.01U L177 VGAL_IN VGAL_IN R60/0603 300mA C626 24C21/SMD/DIP 100P GNDA VFE_GND ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 81 C0603 C0603 C0603 Q118 GPIO8 GPIO8 R451 C446 C447 GPIO8 R403 R404 R508 C0603 C0603 R455 R504 4.7K 4.7K AD8256_SDA IOSDA MMBT3904 AD8256_RST IOSDA 3,10,13,26 C664 0.1u R505 AD8256_SCL IOSCL IOSCL 3,10,13,26 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 82 MMBT3906 R461 IRRCVR IRRCVR 4.7K RED_LED Q121 C726 C727 MMBT3906 47U/16V 0.1U GREEN_LED R463 4.7K 5VSB P112 IRRCVR LED_G LED_R C309 8P_2mm 470P P113 UP3_0 GPIO16 GPIO15 GPIO13 GPIO11 GPIO14 GPIO10 7P_2mm ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 83 MMBT3904 R121/0805 6A MMBT3904 LVDS_GND C740 R480 PANELVCC 0.1U R526 LVDS_GND I142 Q122 GPIO2 R481 100K GPIO2 R479 C739 R858 C737 0.1U C808 100K 1000U/16V MMBT3904 C787 C735 AP9435M 100U/16V LVDS_GND LVDS_GND ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 84 PCTXD PCRXD 0.1U SYSROMWP SCL0 R513 L : Write Protect EEPROM H : Normal Download Q124 DLSW1 GPIO4 DLSW2 R487 EEPROM 24C16 SOP8/SMD CD4052 SOP16/SMD R488 R489 R490 (NC)10K SYSTEM EEPROM MMBT3904 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 85 9. PCB Layout Diagrams 9.1. MAIN PCB TOP VIEW ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 86 9.2. MAIN PCB BOTTOM VIEW ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 87 9.3. CON PCB TOP VIEW...
  • Page 88 9.4. CON PCB BOTTOM VIEW...
  • Page 89 9.5. IR PCB TOP VIEW...
  • Page 90 9.6. IR PCB BOTTOM VIEW...
  • Page 91 9.7. SWITCH PCB TOP VIEW...
  • Page 92 9.8. SWITCH PCB BOTTOM VIEW...
  • Page 93 10. Exploded View And Exploded Parts List ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 94 ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...
  • Page 95 EXPLODED PARTS LIST (N4251w-1) ViewSonic Model Number: VS11502-1M Rev: 1a Serial No. Prefix: QEM Item ViewSonic P/N Ref. P/N Description Q'ty 2024274502P FRONT BEZEL JC429FE ABS94HB PZ2-608-80 2053754801P LED INDIC.-PWR JC268FE PMMA LIMPID 2033150800P IR COVER JC268FE PC LIMPID 476C...

  • Page 96: Recommended Spare Parts List

    Remark 1: Above listed items are examples, supplier can expand the rows to add more necessary items. 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 ViewSonic Corporation...
  • Page 97 BOM LIST (N4251w-1) ViewSonic Model Number: VS11502-1M Rev: 1a Serial No. Prefix: QEM Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2024274502P FRONT BEZEL JC429FE ABS94HB PZ2-608-80 1F01 2053754801P LED INDIC.-PWR JC268FE PMMA LIMPID 1F02 2033150800P IR COVER...
  • Page 98 1150X800mm HDPE 6P60 84 DC-00008106 2001131652P OWNER GUIDE N4251W VS11502-1M USA 6P80 85 DC-00008107 2002310609P GUARANT CARD VIEWSONIC N4251W (M) QSG 6P81 86 P-00004497 2011100017P CARTON BOX 360X220X50mm (WXDXH) BOX(B) 6P85 87 P-00008064 2013228807P POLYETHY BAG 200X350X0.03T mm LDPE B5...
  • Page 99 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 168 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C179 169 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C180 170 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T...
  • Page 100 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 254 N/A 2347647596P CAP,CHIP 85'C CS 0805/Y5V/16V 4.7u Z T C266 255 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C267 256 N/A 2347647596P CAP,CHIP 85'C CS 0805/Y5V/16V 4.7u Z T...
  • Page 101 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 340 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C378 341 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C379 342 N/A 2341110296P CAP,CHIP 125'C CS 0603/COG/50V 1000p J T...
  • Page 102 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 426 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C522 427 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C523 428 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T...
  • Page 103 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 512 N/A 2346110396P CAP,CHIP 125'C CS 0603/X7R/50V 0.01u K T C610 513 N/A 2346147296P CAP,CHIP 125'C CS 0603/X7R/50V 4700p K T C611 514 N/A 2346110396P CAP,CHIP 125'C CS 0603/X7R/50V 0.01u K T...
  • Page 104 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 598 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C734 599 N/A 2336310713P CAP,MINI ELE 105'C EC 100u/ 16V 6.3*7 P=2.5 T C735 600 E-C-0404-3096 2335310812P CAP,ELE LOW ESR 105'C EC 1000u/ 16V 10*20 P=5.0 K...
  • Page 105 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 684 N/A 2336347611P CAP,MINI ELE 105'C EC 47u/ 16V 5*7 P=2.0 C C863 685 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C864 686 N/A 2336310713P CAP,MINI ELE 105'C EC 100u/ 16V 6.3*7 P=2.5 T...
  • Page 106 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 770 E-IC-0401-2745 2365810796P IC,LINEAR(SMD) AP1084K33LA TO-263 I103 771 N/A 2365807496P IC,LINEAR(SMD) AIC1084-33PM TO-263 I103 772 N/A 2365809196P IC,LINEAR(SMD) CM1084SCN263 TO263 CHAMPION I103 773 N/A 2365813696P IC,LINEAR(SMD) AP1117E18LA SOT-223 AnaChip I104...
  • Page 107 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 856 N/A 2379360006P BEAD,HI-IMPEDANCE Z= 60 ohm(200MHZ~) 0603 300mA L120 857 N/A 2371147101P COIL,CHOKE 47uH L121 858 N/A 2379360006P BEAD,HI-IMPEDANCE Z= 60 ohm(200MHZ~) 0603 300mA L122 859 N/A 2371147101P COIL,CHOKE...
  • Page 108 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 942 N/A 2407430900P SOCKET DHSB-15FTF7 BLUE(661C) LEOCO P106 943 N/A 2405106000P EARPHONE JACK 2SJ-P520-A04 (577C) SINGATRON P107 944 N/A 2405322202P RCA JACK RCA JACK 2P (WHT/RED) P108 945 N/A 2404300003P CONNECTOR JST XH 4P TOP P=2.5 OR EQUAL...
  • Page 109 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1028 E-Q-0402-1624 2360301696P XISTOR,NPN R SMD PMBS3904 SOT-23 PHILIPS Q803 1029 E-Q-0402-1608 2360300896P XISTOR,NPN R SMD MMBT3904K SOT-23 FAIRCHILD Q803 1030 E-Q-0402-1087 2360301896P XISTOR,NPN R SMD MMBT3904LT1 SOT23 Q803 1031 E-Q-0402-1624...
  • Page 110 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1114 E-R-0405-6419 2253247296P RES CHIP 1/10W RC 0603 1/10W 4.7Kohm J T R211 1115 E-R-0405-6419 2253247296P RES CHIP 1/10W RC 0603 1/10W 4.7Kohm J T R212 1116 E-R-0405-6600 2253200096P RES CHIP 1/10W...
  • Page 111 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1200 N/A 2253233296P RES CHIP 1/10W RC 0603 1/10W 3.3Kohm J T R344 1201 N/A 2253233296P RES CHIP 1/10W RC 0603 1/10W 3.3Kohm J T R345 1202 N/A 2253251196P RES CHIP 1/10W...
  • Page 112 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1286 N/A 2253210396P RES CHIP 1/10W RC 0603 1/10W 10Kohm J T R468 1287 N/A 2253210396P RES CHIP 1/10W RC 0603 1/10W 10Kohm J T R469 1288 N/A 2253210396P RES CHIP 1/10W...
  • Page 113 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1372 N/A 2251213016P RES,CHIP 1/10 RC 0603 1/10W 1.3Kohm F T R850 1373 E-R-0405-6600 2253200096P RES CHIP 1/10W RC 0603 1/10W 0 ohm J T R851 1374 N/A 2253256196P RES CHIP 1/10W...
  • Page 114 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1458 M-SW-0815-0182 2403702200P TACT SWITCH TSAA-2 HUAJIE S703 1459 M-SW-0815-0182 2403702200P TACT SWITCH TSAA-2 HUAJIE S704 1460 M-SW-0815-0182 2403702200P TACT SWITCH TSAA-2 HUAJIE S705 1461 M-SW-0815-0182 2403702200P TACT SWITCH TSAA-2...

  • Page 115: Pcb Layout Diagrams

    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. You may also e-mail any suggestions to the Director, Quality Systems & Processes (marc.maupin@viewsonic.com) ViewSonic Corporation N4251w-1M Confidential - Do Not Copy...

This manual is also suitable for:

Vs11502-1m

Table of Contents