ViewSonic N2750w-1 Service Manual
  1. Manuals
  2. Brands
  3. ViewSonic Manuals
  4. LCD TV
  5. N2750w-1
  6. Service manual

ViewSonic N2750w-1 Service Manual

27" lcd tv
Hide thumbs

Advertisement

Table of Contents

Service Manual

ViewSonic N2750w-1(M)
Model No. VS10576-1M
27" LCD TV
(N2750w-1M_SM Rev. 1a Apr. 2006)
®
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Advertisement

Table of Contents
loading

Related Manuals for ViewSonic N2750w-1

Summary of Contents for ViewSonic N2750w-1

  • Page 1: Service Manual

    Service Manual ViewSonic N2750w-1(M) Model No. VS10576-1M 27” LCD TV (N2750w-1M_SM Rev. 1a Apr. 2006) ® 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. Block Diagram..................10 6. Schematic Diagrams................11 7. Working Theorem................. 25 8. Wiring Diagram..................27 9. PCB Layout Diagrams................28 10. Trouble Shooting Flow Chart.............. 36 11. Adjustment..................12. Recommended Spare Parts List............42 ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 4: Precautions And Notices

    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. ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 5: Service Tool & Equipment Required

    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:150 Watts(Max.) Speaker 10W×2 Compliance FCC,UL Temperature Operating : 0°C~ +40°C Storage : -20°C~+60°C ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 6 V TOTAL 17.778ms 16.579ms 13.853ms 13.333ms V DISPLAY 17.066ms 15.840ms 12.480ms 12.800ms V B-Porch 0.626ms 0.607ms 0.478ms 0.448ms Vs Width 0.057ms 0.106ms 0.125ms 0.064ms V Border 0.000ms 0.000ms 0.000ms 0.000ms H/V Sync Interlace ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 7 H TOTAL 15.630us H DISPLAY 11.852us H B-Porch 2.296us H Width 1.037us H Border 0.000us V TOTAL 16.661ms V DISPLAY 16.005ms V B-Porch 0.594ms Vs Width 0.047ms V Border 0.00ms H/V Sync Interlace ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 8 TMDS RX1+ TMDS RX0+ TMDS Ground TMDS Ground TMDS Ground Floating Floating Floating Floating Floating Floating DDC Clock +5V Power TMDS Ground DDC Data Ground TMDS Clock+ Floating Hot Plug Detect TMDS Clock- ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 9: Exploded View And Parts List

    1F14 X3 1F21 1F23 X4 1F25 2C01 1F24 X6 1F11 X2 1F21 X2 1F11 FIG.1 NOTE.1 1F22 1F39 X3 5B01 1F25 2C03 1F25 1F25 2C04 5B03 1F25 2C05 1F25 1F25 5B02X6 2C06X2 ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 10 EXPLODED PARTS LIST (N2750w) ViewSonic Model Number: VS10576-1M Rev: 1a Serial No. Prefix: PJL Item ViewSonic P/N Ref. P/N Description Q'ty 1F01 C-00001791 2603307683 BEZEL ASS’Y JC278 ABS 94V0 BLACK #4001 1 1F05 2044266501 FUNCTION KEY JC278 ABS 94V0 AL-PLATE POWER 1...

  • Page 11: Block Diagram

    YPbPr TS5V330/ADG774 RGB 24bits B port AD9883KST To INVERTER +24V I2C Control POWER To main board +12V SUPPLY IR Receiver 128K STK6012 Keypad Control +12V DC to DC +3.3V EEPROM +2.5V 24C16 ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 12: Schematic Diagrams

    R121 R272 R122 Q106 Q113 ION_OFF AP9620M R274 R124 MMBT3904 +3V3 +3V3 R273 BACKLITn C121 R269 R270 R271 Q112 TVM_PWRp MMBT3904 +2V5S R268 Q111 R275 +3V3S +5VS R267 Q110 TVM_PWRp MMBT3904 SI9933ADY ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 13 R139 DVI_DET 11 RSVD CTL3 DFP5V HTPLG RX0- TX0- RX0+ R141 TX0+ C143 R142 TX0/5GND 100n TX5- R144 TX5+ TXC_GND RXC+ VDDCD TXC+ RXC- TXC- R146 R147 Green Blue CRT_Hsync AGND DVI_29pin ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 14 HD_PB R444 C185 22p/ESD Dsub_SDA R167 100R DDCSDA 11 HD_SEL L123 Dsub_SCL R172 100R DDCSCL 11 BEAD/80R YPbPr-Pr HD_PR VSYNC R174 100R PI5V330 GVSYNC 8 C192 HSYNC R175 100R GHSYNC 8 22p/ESD ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 15 RCA JACK 1X2 L129 C204 YPbPr-Audio-L I_AFL BEAD/600R R211 15K C205 C206 10uF/50V 100p 100p L130 C207 YPbPr-Audio-R AGND AGND I_AFR BEAD/600R C208 C209 10uF/50V R212 15K 100p 100p AGND AGND AGND ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 16 C245 BEAD/200R R222 0R/1206 100p 100p R223 0R/1206 C246 100uF/16V R224 R225 AGND AGND L140 BEAD/600R PC_AUDIO_IN PC_AFR 13,14,15,17,18,22,23,24,25,26,30,35,36,37,38,39,52,57,58,59,64Pin is NC Pin C249 C250 C248 100p 100p 10uF/50V AGND AGND AGND AGND ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 17 3.3uH MMD10 MD10 VSS25_1 MMD11 AV1_YC_Y 7 MD11 VSS25_2 MMD12 MD12 VSS25_3 C385 C383 C314 R246 MMD13 MD13 VSS25_4 47p/ESD 330p MMD14 MD14 TESTen 330p MMD15 MD15 TESTPIN S_TERMINAL I116 S-Video T0956 ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 18 2MD02 2MD03 2MD04 2MD05 VSS33_1 2MD06 VSS33_2 2MD07 VSS33_3 2MD08 VSS33_4 2MD09 VSS33_5 2MD10 MD10 VSS25_1 2MD11 MD11 VSS25_2 2MD12 MD12 VSS25_3 2MD13 MD13 VSS25_4 2MD14 MD14 TESTen 2MD15 MD15 TESTPIN I118 ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 19 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n 100n t0932 VSSQ VSSQ MD31 MD63 VSSQ VSSQ SDRAM2MX32-TSOP86 SDRAM2MX32-TSOP86 +3V3D L168 BEAD/200R +3V3 L169 BEAD/200R C473 C472 100n 100uF/16V POWER SECTION ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 20 TXIN16 LVDSGND FFDBA7 TXIN17 LVDSGND FFDBA0 TXIN15 LVDSGND FFDBA1 TXIN18 FFDBA2 PLLVCCA TXIN19 PLLVCC FFDBA3 TXIN20 FFDBA4 TXIN21 PLLGND FFDBA5 TXIN22 PLLGND TXIN23 FFD_HS TXIN24 FFD_VS TXIN25 R397 FFD_DE TXIN26 FFD_CLK TXCLKIN ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 21 1u/16V 0603 AUDIO_R_AMP 470n BYPASS AMP_STBY 4.7K C524 MODE R508 C525 AGND MODE 47uF/16V C526 CON9 1u/16V 0603 R413 10K Q109 47uF/16V AGND PHONE_JACK STANDBY MMBT3904 TPA6110A2 R416 AUDIO_R_AMP R505 AUDIO_L_AMP R506 ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 22 KEY DEFINE CHANG TO JEAN EEWPn 3,4,5,6,7,8 P1.2 P3.7/RD 3,4,5,6,7,8 P1.3 P3.6/WR PHDPDP 8 DVI_PDn P1.4 PSEN LED1 P1.5 ALE/P LED2 JP_TxD P1.6 P3.1/TXD TTFC-RSTN JP_RxD TTfc-RSTn P1.7 P3.0/RXD I138 STK6012/128K/PLCC44 DVI_SCDT ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 23 AGND 3V3_SW 0.1uF 0.1uF AGND C632 C633 0.1uF C636 C631 I602 0.1uF 0.1uF 0.1uF 0.1uF 10uF/50V LT1117-3V3 V33_SRS R622 15.8K R623 17.8K C638 100uF/16V R624 22.6K R625 R626 R627 2.26K 3.09K 4.87K ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 24 R671 180pF 51R/1206 I608 2.4K 2.4K FW332 V12R1 MC78L05_TO252 CONNECT TO VCC C673 C674 R675 GNDRA C675 VCCR VCCL 180pF 0.1uF R676 + C676 15pF R677 100uF/16V GNDRB 3.3K R678 GNDP 3.3k ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 25 KEY0_MENU KEY1_OK KEY2_UP KEY3_DOWN KEY4_INC KEY5_DEC CON7_2mm P711 LED_R LED_G D721 IR_IN PWRON CON6_2mm S705 S702 S703 S704 S706 S707 D711 I711 S701 S721 CAM-1538TP5 I721 2202129900 VOL+ VOL- MENU DOWN POWER ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 26: Dvi Input

    OSD system. The t0932 chip is targeted for the applications of high-end LCD-TV. It will accept all HDTV video signals for flat panel display. It comes with 336-pin and 316-pin BGA package. ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 27 The Antenna receive the TV signal and modulate it to the CVBS signal which can be recognized by the decoder and FM-stereo/FM-mono/NICAM audio signal output to the sound Automatic standard decoder IC MSP3425G or MPS3445G. The MCU can automatic detect the tuner and send order by serial bus. ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 28: Wiring Diagram

    P112 P113 MAIN PCB POWER PCB P114 P601 P123 P115 AUDIO PCB P110 P602 P117 P108 P106 P107 P603 P105 P111 P116 P907 P908 P905 P711 W901 W901 IR PCB SPK(L) SPK(R) ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 29: Pcb Layout Diagrams

    9. PCB Layout Diagrams 9.1 MAIN PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 30 9.2 MAIN PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 31 9.3 AUDIO PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 32 9.4 AUDIO PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 33 9.5 KEYPAD PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 34 9.6 KEYPAD PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 35 9.7 IR PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 36 9.8 IR PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 37: Trouble Shooting Flow Chart

    Replace On C101 Check+12V Power Board Check I101,D101,I104,I1 5V on C106 Check 5V on C115 I103,D103, I114,I131 Check 3.3V on C119 I105,I128 Check 3.3V on C145 I109 Check 2.5V on C431 I116,I123 ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 38 10.2. NO VOICE ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 39 10.3. NO DISPLAY ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 40 Check inverter is OK Change Inverter Check Check I123 has output signal at RP18~RP23 I123,I127,X105 Check Check panel power is 5V Panel Power CKT Change LCD Panel ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 41: Adjustment

    (1) Color temperature medium verify : press “ ▼ ” ,“ ▲ ” key to move cursor to COLOR TEMPERATURE at factory mode and press “ left ” ,“ right ” key set in mediun, and then check the color temperature is x=0.313 ± 0.03 y=0.329 ± 0.03 WARM ViewSonic Corporation Confidential - Do Not Copy N2750w-1...
  • Page 42 COOL Y≧300 cd/m H. Press menu key select the OSD page on INPUT SELECT and select MAIN:YPbPr Input source : DVD Player Pattern : color bar. Repeat the F and G step. ViewSonic Corporation Confidential - Do Not Copy N2750w-1...

  • Page 43: Recommended Spare Parts List

    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 ViewSonic Corporation...
  • Page 44 BOM LIST (N2750w-1M) ViewSonic Model Number: VS10576-1M Rev: 1a Serial No. Prefix: Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2024267302 FRONT BEZEL JC278 ABS 94V0 BLACK #4001 1F01 2054256001 ORNAMENT JC278 FRONT BAR ABSHB AL-PLATE 1F02 2033150400 IR COVER...
  • Page 45 D104 LL4148 3.5X1.5£p TEMIC GS08 D105 D106 E-D-0403-1667 D107 2363703800 LED D711 LED 3£p GRN/YEL M-MS-0808-6352 A-00001785 2419200013 CONT BLOCK JC278A VIEWSONIC N2750 USA H901 2365806396 IC,LINEAR(SMD) SI-8050SD 5V/3A SANKEN I101 I103 E-IC-0401-2123 2365807496 IC,LINEAR(SMD) AIC1084-33CM AIC TO-263 I104 E-IC-0401-2745 2365810796 IC,LINEAR(SMD) AP1084K33A(3.3V) TO-263 ATC...
  • Page 46 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2365919496 IC,DIGITAL SMD AD9883AKST-110 ANALOG DEVICES I109 2365915796 IC,DIGITAL SMD ADG774BRQ QSOP-16 I110 E-00003530 2365813796 IC,LINEAR(SMD) TS5V330DR SOIC-16 I110 E-00002470 2416901600 UV TUNER FQ1236/F H-3(US) PHILIPS I111 2365814796 IC,LINEAR(SMD) HEF4052BT SOT109-1 PHILIPS...
  • Page 47 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2427791890 CABLE EAR(577C)/RCA 2P(R/W) 1.8M BLK P956 2427501187 I/O CABLE D15/D15 20276(3+6) 1.83M BLACK P961 2360501196 FET,P-CH SMD AP9435M SO-8 APEC Q101 2360501696 FET,P-CH SMD SI9435DY SO-8 VISHAY Q101 E-00000916...
  • Page 48 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2251263426 RES,CHIP 1/10 RC 0603 1/10W 63.4Kohm F T R621 2251215826 RES,CHIP 1/10 RC 0603 1/10W 15.8Kohm F T R622 2251217826 RES,CHIP 1/10 RC 0603 1/10W 17.8Kohm F T R623 2251222626 RES,CHIP 1/10 RC 0603 1/10W 22.6Kohm F T...
  • Page 49 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 Confidential - Do Not Copy...

This manual is also suitable for:

N2750w-1mVs10576-1m

Table of Contents