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ViewSonic N2752w-1M Service Manual

ViewSonic N2752w-1M Service Manual

27” lcd tv
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Service Manual
ViewSonic N2752w-1M
Model No. VS11257-1M
27" LCD TV
(N2752w-1M_SM Rev.1b_Aug.2008)
®
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1 Service Manual ViewSonic N2752w-1M Model No. VS11257-1M 27” LCD TV (N2752w-1M_SM Rev.1b_Aug.2008) ® ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...
  • Page 2 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. Adjusting Procedure..................28 6. Trouble Shooting Flow Chart..............58 7. Block Diagram .....................62 8. Schematic Diagrams..................63 9. PCB Layout Diagrams .................91 10. Exploded Diagram And Exploded Parts List...........97 11. Recommend Spare Parts List..............100 ViewSonic Corporation N2752w-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 N2752w-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 N2752w-1M Confidential - Do Not Copy...
  • Page 6 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” ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...

  • Page 7: Specification

    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.) Compatible system TUNER NTSC/ATSC Compatible system AV NTSC M ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 8 Input Current 3.0A @ 115VAC // 1.5A @ 230VAC Max in < 150A (with fully loaded power supply) at Power Supply Inrush 230Vac Shall not result in permanent failure of power supply ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 9 The product firmware of VS11257-1M / VS11335-1M shall have a firmware version of V:P01. Any changes/revisions afterward shall also be pre-approved by ViewSonic in written. For VS11257-1M / VS11335-1M, its firmware shall have a built-in frequency table for NTSC/ATSC off-air TV/CATV, Closed-Caption, and with MTS implementation.
  • Page 10 Painting Color - PANTONE 427C (Black for front bezel & back cover) Power Key - PANTONE 032C (RED) Key Pads – PANTONE 11C & PANTONE 5C(Cool Gray) Color Texts Printed on Front Cover and Key Pads - PANTONE 427C, PANTONE 433C(Black) ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 11 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 12: 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 N2752w-1M Confidential - Do Not Copy...
  • Page 13 SPDIF Optical output Connect this port to the SPDIF input of A/V device. Headphone Jack Connect this port to your headphone. Power (AC input) Using power cord provided, connect to a power source. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 14 Remote Control ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 15 Picture function 26 P.INPUT POP/PIP input source select 27 V-CHIP Set V-Chip rating 28 SWAP Switch between main screen and sub-screen Note: PIP means Picture In Picture. POP means Picture Out Of Picture. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 16 Audio Out: To control sound output ON/OFF from the RCA audio out connectors. Note: To adjust the Audio settings, Smart Sound must be set to the User mode. (Select through the Sound button on the remote control) ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 17 Setup Menu — To set up OSD window Setup Menu is active in all input sources. • Language: To select a OSD language from English, French or Spanish. • Parental: To set up parental control. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 18 Aspect Ratio: To select image size between Normal, Full, Wide1, Wide2, Wide3, 4:3, 16:9, and No scale. • OSD Timeout: To setup the display time of OSD. (5, 15, 45, and 60 seconds) • Memory Recall: To restore the factory default settings. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 19 Auto Scan: Press ENTER to start scanning DTV channels automatically. Press MENU at any time to cancel Auto Scan. • Manual Scan: To scan the DTV channels manually. Press ENTER and select Scan Mode with ◄►. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 20 Press ENTER to start scanning, and press MENU at anytime to cancel scanning. • Channel Skip: To skip channels when viewing channels with CH ▲ and ▼. Press ENTER, and then use ENTER to check/uncheck the channel you want to skip. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 21 Font Opacity: To select font opacity from Solid, Translucent, or Transparent. Background Color: To select background color. Background Opacity: To select background opacity. Window Color: To select window color. Window Opacity: To select window opacity. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 22 Use ▲▼ to select your desired optional item, and press ENTER. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 23 7 and above that is unsuitable for children under 14 years of age TV-G General audience TV-MA Mature audience only Use ENTER button to block or unblock the ratings, and use MENU to exit. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 24 Use ENTER button to block or unblock the ratings, and use MENU to exit. • Block MPAA Unrated: To block unrated movies. • Block TV None Rating: To block unrated TV programs. Notes:Initial password:0000 If you forget your initial password,you can press"8866"to resume. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 25 Note: To select the input source for main screen, press INPUT button. • SWAP: Press SWAP to exchange main screen to sub-screen, including video and sound. The function is available both in PIP and POP. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 26 Use ◄► to move the index between the main screen and the sub-screen. "MENU" Lock & Un-lock: Pressing "Vol+" and "Vol-" from Front Panel Keys. "POWER" Lock & Un-lock: Pressing "Vol+" and "MENU" from Front Panel Keys. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...

  • Page 27: 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 N2752w-1M Confidential - Do Not Copy...
  • Page 28 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 N2752w-1M Confidential - Do Not Copy...
  • Page 29 MT8293 via 3 Data TMDS pairs & 1 CLOCK TMDS pairs. Digital video signals are directly output from the MT5351AG and MT8293 and then transfer them to the MT8202 for advanced processing. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 30 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 N2752w-1M Confidential - Do Not Copy...

  • Page 31: Adjusting Procedure

    1.Fig. 1: under the picture 16 grey scale of VGA source, select WHITE BALANCE and press ENTER, The color warm will auto adjust. The act of EHITE BALANCEL is completed when the picture is steady. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 32 AUDIO IN is right. D. Under YPbPr MODE, input L/R AUDIO signal, checks whether the action of AUDIO IN is right. E. Under HDMI MODE, checks whether the action of AUDIO IN is right. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 33 After final QC step, we must to erase all saved changes again and restore the factory defaults. You should do “All Mode Reset” again. Turn off the LCD TV by pressing “Power” button. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 34 613.75 655.00 614 – 620 615.25 619.75 661.00 620 – 626 621.25 625.75 667.00 626 – 632 627.25 631.75 673.00 632 – 638 633.25 637.75 679.00 639 – 644 639.25 643.75 685.00 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 35 635.75 677.00 336 – 342 337.25 341.75 383.00 636 – 642 637.25 641.75 693.00 342 – 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 N2752w-1M Confidential - Do Not Copy...
  • Page 36 CHANNEL14: Check whether there are some pause or the mosaic phenomenon in the picture. 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 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 37 13.328ms 16.667ms 16.666ms V TOTAL 15.880ms 12.795ms 16.000ms 15.880ms V DISPLAY 0.600ms 0.466ms 0.444ms 0.600ms V B-Porch 0.124ms 0.050ms 0.111ms 0.124ms Vs Width 0.000ms 0.000ms 0.000ms 0.000ms V Border H/V Sync Interlace ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 38 H B-Porch 1.310us 1.037us H Width 0.000us 0.000us H Border 16.662ms 16.661ms V TOTAL 16.097ms 16.005ms V DISPLAY 0.377ms 0.594ms V B-Porch 0.126ms 0.047ms Vs Width 0.00ms 0.00ms V Border H/V Sync Interlace ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 39 DDC Card RS-232 cable Barcode Reader VGA Cable N2752W 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 N2752w-1M Confidential - Do Not Copy...
  • Page 40 2.3.1 Run DDC.exe 2.3.2 Choose model number and conform the Time then Press “ENTER” key. 2.3.3 When appear the PIC “ choose DDC Card”, Press ALT+2 Enter DDC 2B test interface Choose DDC Card ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 41 2.3.4 Press F8 to choose corresponding model. DAT (N2752W-A.DAT press “ENTER” key) 2.3.5 Press F9 enter the download interface ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 42 2.3.6 Key in the serial number or use the barcode reader to scan the barcode of the LCD TV, and press “ENTER” key. 2.3.7 The successful picture is as follows. “Compare EDID:OK! Press any key to continue”. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 43 2.4 Check Method Use ViewSonic EDID Editor Connect the N2752W LCD TV to PC with VGA Cable. Execute the EDID Editor, then Press Ctrl+F5. If the DDC is correct, you can see the information as follow: ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 44 3.1 Equipment Needed N2752W LCD TV RS-232 cable Barcode Reader HDMI Cable N2752W LCD TV RS-232 Cable HDMI Cable Barcode Reader 3.2 Setup Procedure 3.2.1 Connect HDMI Card and DDC Card with RS-232 cable. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 45 3.2.2 Barcode Reader connects with keyboard and PC keyboard port. 3.2.3 Connect DDC Card and N2752W LCD TV with HDMI Cable. 3.2.4 Connect Power Cord to N2752W LCD TV. 3.3 DDC Key In Procedure 3.3.1 Run DDC.exe ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 46 3.3.2 Choose model number then 3.3.3 Press “ENTER” key. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 47 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 Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 48 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 Operate 4.5.1 Select Platform : MT8105 , MT1389 or MT8205 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 49 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 N2752w-1M Confidential - Do Not Copy...
  • Page 50 4.5.4 Enable the USB Bridge. 4.5.5 Browsing the File to download. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 51 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 N2752w-1M Confidential - Do Not Copy...
  • Page 52 At last, close the carton and seal it with tape. (Figure 4) 1.Power Cord 2.VGA Cable 3.RF Cable 4.RCA Cable 5.User’s Guide 6.Remote contrl 7.Guarant Card 8.Battery Figure 4 Figure 3 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 53 PACKING PART LIST (N2752w-1M) ViewSonic Model Number: VS11257-1M Rev: 1a Item ViewSonic P/N Ref. P/N Description Q'ty N2752W monitor P-00008117 2013054003P POLYETHY BAG P-00005510 2012177501P POLYFOAM (L) P-00005511 2012177601P POLYFOAM (R) P-00008114 2012180002P POLYFOAM(DOWN) P-00008064 2013228807P POLYETHY BAG DC-00008114 2001131622P...
  • Page 54 Disassembly Procedure Disassembly of Stand and Dust Cover from LCD TV. 1.1 Detach Dust Cover from the LCD TV and Unscrew 4 screws that secure Stand Unit. Dust Cover Dust Cover Stand ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 55 2.1 Unscrew 8 screws to remove Rear Cover. Rear Cover 3. Disassembly of Main Board,Power Board,IR Board,Speaker,Front Cover and Panel Unit. 3.1 Unscrew 13 screws to remove Shield Plate and dust cover. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 56 Shield Plate Dust Cover 3.2. Unscrew 4 screws to remove Speaker. Speaker 3.3. Unscrew 10 screws to remove Bracket.Fix. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 57 3.4. Unscrew 15 screws to remove METAL FITTG-IO. METAL FITTG-I/O-Down ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 58 METAL FITTG-I/O-Side 3.5. Unscrew 5 screws and disconnect the wires to remove Main Board. Main Board ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 59 3.6. Unscrew 4 screws and disconnect the wires to remove Power Board. Power Board 3.7. Unscrew 2 screws to remove Front Cover. ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 60 3.8. Lay Panel Unit facedown and unscrew 9 screws on its right,left,up and down sides, to remove Panel Unit and Panel Bracket. Panel Bracket Panel Unit ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...

  • Page 61: 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 N2752w-1M Confidential - Do Not Copy...
  • Page 62 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 N2752w-1M Confidential - Do Not Copy...
  • Page 63 6.3. NO DISPLAY NTSC YPb Pr S-VIDEO Check Check Video wave form is Replace L221,R172 Check L224,R197,C340 is Replace L224,R197 or Replace I112 L221,R172,R173,C332,C33 on I112 Pin12 ? R173,C332,or C334 C340 4 is OK? Check Replace L215,R501,R170,C331 is L215.R501,R170 or C331 Check L226,R203,C335 is Replace L226,R203, or...
  • Page 64 RP32~RP41? Pin19~22 of P114 ? Check the LVDS wire from Replace LVDS Wire P114 to panel is OK? Check inverter wire from power board to panel is Replace Inverter Wire Replace Panel ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...

  • Page 65: Block Diagram

    HDMI MT8293 Connector (HDMI Rx) MT8202 Flash NTSC Tuner AV(CVBS) S-Video2 SDRAM YPbPr SDRAM PC(D-Sub) AV/SV Audio(RCAx2) CD4052 AD12250 AD8256 YPbPr Audio(RCAx2) Speaker (Audio sw.) (A/D converter) (Audio Amp.) PC/DVI Audio(mini jack) ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...

  • Page 66: Schematic Diagrams

    CON_ 2.5mm_12 L234 L218 R113 AUIO IN/OUT GND DIGITAL GND MMBT3904 UP3_4 UP3_4 R201/0805 R201/0805 (NC)47K UP3_5 UP3_5 5VSB PWM0 PWM0 PWM1 PWM1 DC INPUT C106 C107 0.1U 1000U/16V/LowESR GNDP GNDP GNDP ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 67 DV33B L111 R121/0603 AV33A 100U/16V 0.1U LVDS_GND C130 47U/16V LVDS_GND I105 C131 C133 C132 100U/16V 220U/16V C134 0.1U 0.1U AP1084K33 +3.3V Regulator TO-263 LVDS_GND LVDS_GND 3,5,25 VFE_GND VFE_GND 3,5,8,19 VFE_GND1 VFE_GND1 3,5,8,19 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 68 TP31 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 N2752w-1M Confidential - Do Not Copy...
  • Page 69 GNDA 3,8,19,22 10U/50V 4.7U 0.1U ADCV33A C0603 VFE_GND L123 47uH ADACVDD VFE_GND L124 R60/0603 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 N2752w-1M Confidential - Do Not Copy...
  • Page 70 C212 100U/16V 0.1U C213 DV25B 0.1U C214 C215 C216 C217 C218 470U/16V AMC7585-3.3V/TO252 CLOSE TO 8202 PIN 0.1U 0.1U 0.1U 0.1U 0.1U C219 C220 DV25A 100U/16V 470U/16V C222 C223 100U/16V 0.1U CE025063 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 71 8.6. MT8202 Digital Decoupling MT8202 DIGITAL POWER & DECOUPLING SB33A SB18A SB18A DV18A C286 C287 C288 C289 0.1U 0.1U 3300P 0.1U C0603 C0603 C290 C291 C292 0.1U 0.1U 0.1U C0603 C0603 C0603 C293 C294 C295 0.1U 0.01U 3300P C0603 C0603 C0603 5VSB DV33A...
  • Page 72 C346 330P FROM AV BOARD C347 VFE_GND1 AVPR0N R181 C348 0.01U PR0- AADCVSS AADCVSS 3,5,19,22 VFE_GND1 VFE_GND1 2,3,5,19 FROM Tuner TUMPX1 C349 MPX1 TUMPX2 R183 R184 C351 47U/16V MPX2 C352 C353 AADCVSS ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 73 IOSDA R156 IOSCL R157 UP3_4, UP3_5 OPTION REMOVE L125 SCL_V50 TU_SCL 2.2uH C307 (NC)?uF L126 SDA_V50 TU_SDA 2.2uH C308 (NC)?uF C330 IOSCL IOSCL TUMPX2 TUMPX2 IOSDA IOSDA 47U/16V CE025050 10,26 MONO 10,26 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 74 S-VIDEO/AV AUDIO IN SY0_GND R536 SVIDEO Input. SY0_IN L225 P103 SC0_IN R200 AVSC0 D108 SC0_IN 2.2uH R201 SY0_GND 5.6V SC0_GND R537 S_TERMINAL1 L226 AV0_IN R203 AVCVBS1 D109 2.2uH R204 5.6V AV0_GND R538 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 75 MOSFET N 2SK2158 (NC)1M AVCC SOT23 L147 R60/0603 AVCC18 C410 C411 X101 R60/0603 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 N2752w-1M Confidential - Do Not Copy...
  • Page 76 TSSOP16 DV18 POWER +1V8 MT5111 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 N2752w-1M Confidential - Do Not Copy...
  • Page 77 R416 15,16,18 B9105B_3V3 SHDN DV12 11.5K1% 15,18 DV12 R0603 Regulator AP1522 SOT23-5/SMD 11,13,14,15,16,17,18 Vout = 1.25 x ( 1 + Rb / Ra ) GLOBAL SIGNAL POWER SUPPLY +30V FOR SAMSUNG TUNER ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 78 R160 100 R0603 T_SDA_5111 C314 CVBS 0.1U 10U/50V C0603 CE025050 PORT TUNER DTVS203CH201M IF_AGC IF_AGC 2nd_IF+ 2nd_IF+ 2nd_IF- +30V_TUNER 2nd_IF- +30V_TUNER +5V_TUNER +5V_TUNER T_SDA_5111 T_SDA_5111 [1,2,4,5,6,7,8] T_SCL_5111 T_SCL_5111 GLOBAL SIGNAL TUNER INTERFACE ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 79 C486 CE025050 C0603 L0805 C487 0.1U 0.1U 0.1U 0.1U 0.1U Digital 1.8V Bypass Caps C481 10U/50V 0.1U C0603 C0603 C0603 C0603 C0603 Digital 3.3V Bypass Caps CE025050 C0603 Analog 3.3V Bypass Caps ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 80 AVDD_APLL0 CAPVPLL CAPVPLL CAPVGND CAPVGND APLLCAP1 APLLCAP1 APLLCAP0 APLLCAP0 ATP1 ATP1 ATP2 ATP2 ANALOG PART 5VDD L198 R121/0603 C743 0.1U OPTICAL MT5351 BGA471/SMD/SOCKET ASPDIF R493 DV25 SPDIF CIRCUIT P116 S/PDIF OUT RCA/SPDIF/DIP ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 81 CE025063 C0603 C0603 C0603 C0603 C0603 C0603 C0603 C0603 BYPASS CAP. FOR TERMINATOR C546 C547 FOR DDR#2 0.1U 0.1U (EVERY 2 RESISTOR PUT 1 C0603 C0603 BYPASS CAP.) BYPASS CAP. FOR DDR ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 82 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 N2752w-1M Confidential - Do Not Copy...
  • Page 83 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 N2752w-1M Confidential - Do Not Copy...
  • Page 84 VSYNC_1 L176 SC20 VGAVSYNC_1 C622 CVCK VCLK R347 D134 C623 VGASCL C624 100P (NC)5.6V 0.01U 100K L178 VGASDA R348 C625 R121/0603 5.6V 0.01U L177 VGAL_IN VGAL_IN R60/0603 C626 24C21/SMD/DIP 100P GNDA VFE_GND ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 85 VGAL_IN VGA_L VGAR_IN VGA_R SG_12V R363 R364 L232 SG_12V C633 0.1U C0603 SG20 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 N2752w-1M Confidential - Do Not Copy...
  • Page 86 ADCVL C653 C652 SDOUT A_IN_R 0.1U 47U/16V 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 N2752w-1M Confidential - Do Not Copy...
  • Page 87 22U/50V C748 TP02 AUDIO_OUT2_R AU2AVR VIDEO_OUT R430 L188 R121/0603 R525 C692 C693 NC(100U/16V) 1000P 1000P R497 R498 R499 NC(10K) GNDA D141 (NC)1K NC(220) (NC)5.6V AUDIO OUT RL RCA JACK 1*2 layo ut ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 88 0.1U 0.1U 3_3AMP 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 C664 R505 AD8256_SCL IOSCL IOSCL ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 89 8.24. IR & Keypad Interface SB33B 5VSB UP3_0 UP3_0 UP3_1 UP3_1 GPIO10 GPIO10 GPIO11 GPIO11 GPIO12 GPIO12 R458 GPIO13 GPIO13 R459 R460 GPIO14 GPIO14 GPIO15 GPIO15 Q120 GPIO16 GPIO16 R462 MMBT3906 R461 IRRCVR1 IRRCVR1 4.7K UP3_1 Q121 C726 C727 MMBT3906 47U/16V 0.1U GPIO12...
  • Page 90 CHANGE 5VSB L195 R121/0805 L196 (NC)R121/0805 C740 R480 PANELVCC 0.1U R526 LVDS_GND I142 Q122 GPIO2 R481 47K GPIO2 R479 C739 C737 0.1U (NC)47K 220U/16V MMBT3904 C787 C735 AP9435M 0.1U 47U/16V LVDS_GND LVDS_GND ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 91 PCTXD PCRXD 0.1U SYSROMWP R513 SCL0 L : Write Protect EEPROM H : Normal Download Q124 DLSW1 DLSW2 R487 GPIO4 EEPROM 24C16 SOP8/SMD CD4052 SOP16/SMD R488 R489 R490 SYSTEM EEPROM (NC)10K MMBT3904 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 92 8.27 Power board ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 93 8.28 Power supply board ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 94 9. PCB Layout Diagrams 9.1. MAIN PCB TOP VIEW V iewSonic C orp or ation Confidential - Do Not Copy N2752w-1M...
  • Page 95 9.2. MAIN PCB BOTTOM VIEW V iewSonic C orp or ation Confidential - Do Not Copy N2752w-1M...
  • Page 96 9.3. CON PCB TOP VIEW...
  • Page 97 9.4. CON PCB BOTTOM VIEW...
  • Page 98 9.5. IR PCB TOP VIEW...
  • Page 99 9.6. IR PCB BOTTOM VIEW...
  • Page 100 10. Exploded View And Exploded Parts List ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 101 ViewSonic Corporation N2752w-1M Confidential - Do Not Copy...
  • Page 102 EXPLODED PARTS LIST (N2752w-1M) ViewSonic Model Number: VS11257-1M Rev: 1a Serial No. Prefix: QD9 Item ViewSonic P/N Ref. P/N Description Q'ty 2024268007P FRONT BEZEL JC278UB ABS94HB BLACK 2044266901P FUNCTION KEY JC278UB ABS 94V0 AL-PLATE PWR M-SCW-0824-0285 2084730082P SCREW,BND T+ M3X8(BND T+)
  • Page 103 All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic Corporation. This is to eliminate repeated cross checks of each item between this version and prior versions ViewSonic Corporation...
  • Page 104 BOM LIST (N2752w-1M) ViewSonic Model Number: VS11257-1M Rev: 1a Serial No. Prefix: QD9 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C100 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T...
  • Page 105 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C436 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C439 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C440 2341110296P CAP,CHIP 125'C...
  • Page 106 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 173 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C729 174 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C730 175 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T...
  • Page 107 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 262 N/A 2365107296P MEMORY IC (SDRAM) NT5DS8M16FS-5T TSSOP66 NANYA I108 263 N/A 2365107396P MEMORY IC (SDRAM) M13S128168A-5TG TSOP-66 ESMT I108 264 N/A 2365107296P MEMORY IC (SDRAM) NT5DS8M16FS-5T TSSOP66 NANYA I109...
  • Page 108 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 351 N/A 2379512106P BEAD,HI-CURRENT Z= 120 ohm 0603 I=3.0A L180 352 N/A 2379512106P BEAD,HI-CURRENT Z= 120 ohm 0603 I=3.0A L181 353 N/A 2379512106P BEAD,HI-CURRENT Z= 120 ohm 0603 I=3.0A L182...
  • Page 109 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 440 N/A 2259275008P RES,CHIP NETWORKS 8P4R 1/16W 75 ohm J P=0.8 RP13 441 N/A 2259275008P RES,CHIP NETWORKS 8P4R 1/16W 75 ohm J P=0.8 RP14 442 N/A 2259247008P RES,CHIP NETWORKS 8P4R 1/16W 47 ohm J P=0.8...
  • Page 110 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 529 N/A 2253275096P RES CHIP 1/10W RC 0603 1/10W 75 ohm J T R140 530 E-R-0405-6602 2253215196P RES CHIP 1/10W RC 0603 1/10W 150 ohm J T R141 531 N/A...
  • Page 111 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 618 N/A 2253275096P RES CHIP 1/10W RC 0603 1/10W 75 ohm J T R279 619 N/A 2253222096P RES CHIP 1/10W RC 0603 1/10W 22 ohm J T R280 620 N/A...
  • Page 112 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 707 N/A 2253210096P RES CHIP 1/10W RC 0603 1/10W 10 ohm J T R417 708 E-R-0405-6600 2253200096P RES CHIP 1/10W RC 0603 1/10W 0 ohm J T R419 709 N/A...
  • Page 113 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 796 N/A 2336022713P HI-LIFE LOW ESR E.CAP (4000 HR) EC 220u/ 16V 8*7 P=5.0 T C110 797 N/A 2333347613P CAP ELE 105'C EC 47u/ 16V 5*11 P=2.5 T C111 798 N/A 2336010713P HI-LIFE LOW ESR ELE CAP EC 100u/ 16V 6.3*7 P=2.5 T...
  • Page 114 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 885 E-00000999 2336347613P CAP,MINI ELE 105'C EC 47u/ 16V 5*7 P=2.5 T C671 886 E-00000999 2336347613P CAP,MINI ELE 105'C EC 47u/ 16V 5*7 P=2.5 T C673 887 N/A 2336610613P CAP,MINI ELE 105'C EC 10u/ 50V 5*7 P=2.5 T...
  • Page 115 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 974 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C233 975 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C235 976 N/A 2347647596P CAP,CHIP 85'C CS 0805/Y5V/16V 4.7u Z T...
  • Page 116 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1063 N/A 2341110296P CAP,CHIP 125'C CS 0603/COG/50V 1000p J T C400 1064 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C402 1065 N/A 2341110296P CAP,CHIP 125'C CS 0603/COG/50V 1000p J T...
  • Page 117 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1152 N/A 2347647596P CAP,CHIP 85'C CS 0805/Y5V/16V 4.7u Z T C566 1153 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T C567 1154 N/A 2346110496P CAP,CHIP 125'C CS 0603/X7R/50V 0.1u K T...
  • Page 118 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 1241 N/A 2379512106P BEAD,HI-CURRENT Z= 120 ohm 0603 I=3.0A L160 1242 N/A 2379360006P BEAD,HI-IMPEDANCE Z= 60 ohm(200MHZ~) 0603 300mA L162 1243 N/A 2379512106P BEAD,HI-CURRENT Z= 120 ohm 0603 I=3.0A L168...
  • Page 119 N2752W VS11257-1M USA 6P80 1414 DC-00008115 2002310600P GUARANT CARD VIEWSONIC N2752W (M) QSG 6P81 1415 N/A 2001950197P ATTACH SHEET VIEWSONIC ATSC INSERT PAGE USA 6P82 1416 P-00004497 2011100017P CARTON BOX 360X220X50mm (WXDXH) BOX(B) 6P85 1417 P-00008064 2013228807P POLYETHY BAG 200X350X0.03T mm LDPE B5...
  • Page 120 Ref. P/N Description Location Universal number# Q'ty 1419 N/A 2055632224P LABEL N2752W VS11257-1M (M) CMO 6P02 1420 N/A 2055613503P LABEL VIEWSONIC POP STICKER 406.5X34 6P03 1421 N/A 2055613508P LABEL DOLBY/HDMI STICKER 50*8MM 6P04 1422 N/A 2063301700P PROTECTOR 355mm*620mm*0.075mm 6P07 1423 N/A...

  • Page 121: 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 N2752w-1M Confidential - Do Not Copy...

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