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ViewSonic N3250w-G VS10769-1G Service Manual

32” lcd tv display
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Service Manual

ViewSonic N3250w-G-1
Model No. VS10769-1G
32" LCD TV Display
(N3250w-G_SM Rev. 1a Jan. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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Summary of Contents for ViewSonic N3250w-G VS10769-1G

  • Page 1: Service Manual

    Service Manual ViewSonic N3250w-G-1 Model No. VS10769-1G 32” LCD TV Display (N3250w-G_SM Rev. 1a Jan. 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. Packing For Shipping And Disassembly Procedure 6. Troubleshooting Flow Chart 7. Exploded View 8. Recommended Spare Parts List 9. Block Diagram 10. Schematic Diagrams 11. Working Theorem 12. Wiring Diagram 13. PCB Layout Diagrams Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 4: Precautions And Safety 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. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 5 Only touch the metal frame of the LCD panel Surface of the LCD panel is pressed by fingers or the front cover of the LCD TV. Do not touch and that may cause “Mura” the surface of the polarizer. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 6 That may cause “Mura” Place the LCD TV on a clean and soft foam Placing the LCD TV on foreign objects. That pad. could scratch the surface of the panel or cause “Mura” Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 7: 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: 200 Watts (Max.) Speaker 10W×2 Compliance FCC,UL Temperature Operating : 0°C~ +40°C Storage : -20°C~+60°C Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 8 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 Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 9 The signal cable connector shall be a molded-over, shield twisted pair cable. The cable shall be 1.8 meters long. The pin assignments shall be listed as below: D-SUB Connector Red Video Green Video Blue Video +5V for DDC H-sync V-sync Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 10 12 Floating 20 Floating Floating 13 Floating 21 Floating DDC Clock 14 +5V Power 22 TMDS Ground DDC Data 15 Ground 23 TMDS Clock+ Floating 16 Hot Plug Detect 24 TMDS Clock- Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 11: Adjustment Procedure

    Press “▼” key to select the “ WHITE BALANCE” item in the factory mode and press “enter “key, then the white balance will be auto dadjusted . G. Color temperature verification : Warm /SRGB x=0.313±0.03 y=0.329±0.03 USER x=0.283±0.03 y=0.298±0.03 COOL x=0.271±0.03 y=0.278±0.03 Y ≥ 380 cd/m Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 12 C. LCD TV should be run-in and warmed up for at least 30 minutes. D. Make sure the distance between SENOR of the CA110 and the LCD TV is about 20cm. E. Color Temperature adjusting. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 13 B. Pattern: TEST-TTL/ECL. C. BRIGHTNESS=MAX, CONTRAST=MAX. D. The power that each MODE consumes is shown in Chart 1. MAX POWER CONSUMED POWER LED COLOR MODE <200W GREEN NORMAL <5W ORANGE Standby <5W Chart 1 Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 14 Whether there is unusual sound, input signal LEVEL<=36dBu,and STEREO SENSITIVITY is normal. P7. Adjustment attenuator, If the critical point of the change of the image signal to noise ratio is under LEVEL<=60dBu,regards as normally. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 15 YCBCR YPBPR HDMI MODE (scart CVBS) (scart RGB) (D-Sub) (HDCP) RF(Analog) 576i 576p HD 720p HD 1080i 640*480@60Hz 640*480@75Hz 800*600@60Hz 800*600@75Hz 1024*768@60Hz 1024*768@75Hz 1280*720@60Hz 1280*768@60Hz 1360*768@60Hz 1280*1024@60Hz Chart 3. Mode Compatibility Table---N3250W(G) Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 16 After final QC step, we have to erase all saved changes again and restore the factory defaults. You should do “All Mode Reset” again. Power Off LCD TV. Turn off the LCD TV by pressing “Power” button. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 17 - PC (Personal Computer) - LPT Cable - Firmware Upgrade Program - One additional LCD TV for checking the program execution Com Port N3250W(G) LCD TV RS-232 Cable (pin to pin) VGA Cable Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 18 2.2.4 Connect Power Cord to N3250W(G) LCD TV. 2.2.5 Connect PC to the additional LCD TV. 2.3. ISP Download program procedure 2.3.1 Hardware Connect status: 2.3.2 Download ISP program Step 1: Execute ISP.exe Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 19 N3250W(G) LCD TV for this project., then press the OK Button. Step 3: Load file Press the Load MCU File button to select the file (File 0 and File 1) will be downloaded. (*.Hex) Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 20 Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 21 Step 4: Test Communication Pressing the ConNect button to test whether the communication is well. Testing Result Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 22 The connecting status between ISP status and LCD TV. Turn off the power of LCD TV (AC plug off) and disconnect the D-Sub connector. To connect the D-Sub connector and then turn on the power of LCD TV.(AC plug on) Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 23 If the test result shows “Connected,” it means the connection is well. If not (failed), it means the connection has problems. Then you need to check the setup procedure or reboot the PC, or simply use another PC to do the firmware upgrade. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 24 2. If you find the DDC does not conform to the LCD TV, you have to do the DDC key in. 3.1. Equipment Needed N3250W(G) LCD TV DDC Card RS232 cable Barcode Reader VGA Cable N3250W(G) LCD TV DDC Card RS-232 Cable VGA Cable Barcode Reader Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 25 (when key in DVI DDC information, use VGA transform to DVI port ) 3.2.4 Connect Power Cord to N3250W(G) LCD TV. 3.3. DDC Key In Procedure 3.3.1 Run DDC.exe 3.3.2 Choose model number and conform the Time then Press “ENTER” key. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 26 3.3.3 When appear the PIC “ choose DDC Card”, Press ALT+2 Enter DDC 2B test interface. Choose DDC Card 3.3.4 Press F8 to choose corresponding model.DAT (N3250W-G.DAT press “ENTER” key) Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 27 3.3.5 Press F9 enter the download interface 3.3.6 Key in the serial number or use the barcode reader to scan the barcode of the LCD TV, and press “ENTER” key. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 28 3.3.7 The successful picture is as follows. “Compare EDID:OK! Press any key to continue”. 3.4. Check Method Use ViewSonic EDID Editor Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 29 Connect the N3250W(G) LCD TV to PC with VGA Cable. Excute the EDID Editor, then Press Ctrl+F5. If the DDC is correct, you can see the information as follow: Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 30: Packing For Shipping And Disassembly Procedure

    At last, close the carton and seal it with tape. (Figure 4) 1.Power Cord 2.VGA Cable 3.SCART Cable 4.RCA Cable 5.User’s Guide 6.Remote contrl 7. GUARANT CARD 8.BATTERY Figure 4 Figure 3 Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 31 Disassembly Procedure Disassembly of Stand and Dust Cover from LCD TV. 1.1 Unscrew 4 screws that secure Stand Unit. 1.2 Detach Stand Unit from the LCD TV. Stand Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 32 1.3 Detach Dust Cover from the LCD TV. Dust Cover Dust Cover 2. Disassembly of Rear Cover. 2.1 Unscrew 16 screws to remove Rear Cover. Rear Cover Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 33 3. Disassembly of Main Board, Power Board, Keypad,IR Board,Speaker,Front Cover and Panel Unit. 3.1 Unscrew 14 screws to remove Shielding Plate. Shielding Plate 3.2. Unscrew 3 screws to remove Dust Cover. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 34 3.3. Unscrew 3 screws to remove Metal Fittg. 3.4. Unscrew 10 screws to remove Metal Fittg. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 35 3.5. Unscrew 4 screws and disconnect the wires to remove Main Board. Main Board 3.6. Unscrew 6 screws and disconnect the wires to remove Power Board. Power Board 3.7. Unscrew 6 screws and disconnect the wires to remove KeyPad. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 36 Keypad Board 3.8. Unscrew 8 screws to remove Speaker. Speaker 3.9. Unscrew 6 screws to remove Bracket Bracket Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 37 3.11. Unscrew 4 screws to remove IR Board. IR Board 3.12. Lay Panel Unit facedown and unscrew 6 screws on its right and left sides, to remove Panel Unit and Panel Bracket. Panel Bracket Panel Unit Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 38: Troubleshooting Flow Chart

    Remove p118 Replace Power P118 pin 5,6 Check 12v & 5v Board Is 12v? Check I113 Replace is working? X103,I114,I113 Check p711 Check wireharness pin 5 is 5v? p703 Replace IR board Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 39 Check SCART1 SCART YPbPr I110 pin 9,11,12,14 TV model S-VIDEO C278,C279,L155,L153 Check Check I127 Check I127 Check R500,R501 Check I127 Check R498,R499 Replace I118 I118 pin 14 pin 44,45 pin 38,39 L138,L139,C602,C603 pin 35,36 C600,C601,L136,L137 Check I110 pin 9,10,12,13 SCART2 C281,C282,L159,L160 Check I127 L 171,L173,R502...
  • Page 40 S-VIDEO TV model SCART SCART1 Check I110 pin 2,4 C277 Check Check Check Check I118 pin 12 has Check I107 pin 27 has Check Check Replace I118 I109 pin 2,6 has I107 pin 26,34 has C262,C263,R215,R217,L signal? signal I107 pin 27 I109 pin 2,4 L135 signal? signal?
  • Page 41 Check I103 if RST pin81 have reset pulse I113 set reset pusle? Check I100 crystal 14.318MHZ if working? Change I103 Check P116 data bus have signal Check panel power 5v Change LCD panel Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 42: Exploded View

    7. Exploded View Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 43 EXPLODED PARTS LIST (N3250w-1G) ViewSonic Model Number: VS10769-1G Rev: 1a Serial No. Prefix: PS6 Item ViewSonic P/N Ref.P/N Description Q'ty 1F01 #N/A 2024268203 FRONT BEZEL ABS 94HB BLACK/PS-7604B(V.S) 1F02 #N/A 2054256101 ORNAMENT ABS 94HB AL-PLATE 1F03 #N/A 2033150600 IR COVER...

  • Page 44: Recommended Spare Parts List

    2427701893P P905 I/O CABLE D15/D15 20276(3+6) 1.83M BLACK A-VC-0101-0386 2427501187P P902 Documentation: GUARANT CARD VIEWSONIC N3250W(G) QSG DC-00004496 2002310515P 6P81 GUARANT CARD VIEWSONIC WARRANTY CARD-C 2004 DC-00003461 2002310402P 6P07 Electronic Components: LCD PANELT315XW01 V2 AU E-00003571 2212008100P V901 Packing Material:...
  • Page 45 LABEL N3250W VS10769-1G (G) AUO 6P02 #N/A 2055636040P LABEL N3250W VS10769-1G SMALL LABEL 6P05 DC-00003461 2002310402P GUARANT CARD VIEWSONIC WARRANTY CARD-C 2004 6P07 M-LB-0813-0862 2056606025P SERIAL LABEL VS CN WARRANTY CARD SN STICKER 6P08 M-LB-0813-0984 2002201323P DISPLAY CARD VIEWSONIC CRT QUALIFIED LABEL...
  • Page 46 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty C105 C107 C108 C109 C10 C111 C417 C418 C419 C425 #N/A 2346147396P CAP,CHIP 125'C CS 0603/X7R/50V 0.047u K T C426 C427 #N/A 2341112096P CAP,CHIP 125'C CS 0603/COG/50V 12p J T...
  • Page 47 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty D100 D101 E-D-0403-1666 2364500396P DIODE,ZENER SMD RLZ5.6B 5.45-5.73V LL-34 ROHM D104 D100 D101 #N/A 2364505636P DIODE,ZENER SMD BZV55-B5V6 2% SOD-80C PHILIPS D104 D102 D103 D105 D106 D107 D112 #N/A 2364600496P...
  • Page 48 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty L100 L101L102 L130 L131 #N/A 2379330006P BEAD,HI-IMPEDANCE Z= 30 ohm(200MHZ~) 0603 300mA L132 L134L135 #N/A 2379322106P BEAD,HI-IMPEDANCE Z= 220 ohm(200MHZ~) 0603 200mA L103 L104 L136 L137 L138 L139 L148 L151 L153 L155 L159...
  • Page 49 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty Q100 Q104 Q105 Q108 Q109 Q112 Q113 Q114 Q115 Q116 Q118 Q128 Q129 Q130 Q131 E-Q-0402-1087 2360301896P XISTOR,NPN R SMD MMBT3904LT1 SOT23 Q100 Q104 Q105 Q108 Q109 Q112 Q113 Q114...
  • Page 50 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty R103 R106 R107 R109 R131 R132 R144 R168 R169 R170 E-R-0405-6409 2253210196P RES CHIP 1/10W RC 0603 1/10W 100 ohm J T R171 R348 R518 R108 R110 R114 R115 R121...

  • Page 51: Block Diagram

    SCART1 for TV only I114 24LC16 SCART2 Audio L/R OUT EEPROM , I115 24LC04 Lout Rout HDCP EEPROM I129 TPA3004D2 L/R Speaker Audio AMP Rout Lout EAR Phone JACK N3250w-G LCD TV/Monitor Block Diagram Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 52: Schematic Diagrams

    A_RED R128 A_GREEN Q100 A_BLUE MMBT3904 A_HSYNC VGA_CAB A_GND1 A_GND2 SHELL2 DVI-24 R120 D105 HPD_CAB LL4148 GVCC1 C119 10P/ESD P2,5,8,10,11 D106 LL4148 D102 GDC5V GVCC LL4148 RX_SCL TX_SDA D103 LL4148 D104 5.6V Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 53 C159 C160 C161 C162 C163 +3.3V for L114 C157 VDDP 10U/50V 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U R201/0805 C165 C166 C167 C168 C169 C170 C164 10U/50V 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 54 FSDATA30 MDATA30 VSSQ FSDATA31 MDATA31 VSSQ VSSQ VSSQ FSVREF 2_5V_DMQ Near The DDR-RAM IC VSSQ VSSQ VSSQ VSSQ R172 VSSQ VSSQ VSSQ VSSQ FSVREF VSSQ R173 C197 0.1U Near The DDR-SDRAM IC Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 55 GNDV GNDV LUM_IN R215 C262 0.1U LUM_IN R218 CHR_IN R217 C263 0.1U CHR_IN R221 R222 R223 C266 C267 C268 C264 C265 R219 R220 100P 100P 100P 100P 100P GNDV GNDV GNDV GNDV Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 56 7P_2mm 24LC32/DIP/SN CON_4_2.5mm 5VD 5VD I2C address A4 R323 C390 For HDCP encode 4.7K 0.1U key storagy I115 R325 R324 4.7K 4.7K R326 0 I2C_SCL I2C_SCL P4,7,8 I2C_SDA I2C_SDA P4,7,8 24LC04BT/SN//DIP R327 Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 57 0.1U 22U/16V PC_R PC_R R385 FS_SC2 FS_SC2 C489 C640 SAA_OUT Q105 P4,7 SAA_OUT MMBT3904 100p 100U/16V R388 L173 R600/0603 L206 PC_L PC_L R387 C497 C494 R120/0603 C644 R392 10P/ESD R390 NC(100U/16V) 100p Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 58 P4,6 CHASSIS CVBS CHASSIS VCC-IF TUN_MONO CHASSIS AF O/P GND_API C518 Tuner FQ1216_MK3 C519 47U/16V C522 L161 C520 C521 1000P R526 0.1U 1500U/10V R412 330P R201/0805 ALL_RST TUNER P5,7 ALL_RST R413 GNDV Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 59 AUDIO O/P C682 1u/50V 1u/50V R545 R546 1u/16V 0603 C684 R556 GND_APO R548 10uF/50V R555 Q128 MMBT3904 GNDGND C685 C686 C687 R551 0.1U 330P 330P AGND Q131 R549 MMBT3904 Q129 R554 MMBT3904 R553 Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 60 L179 R80/0805/BEAD R600 R601 R602 R607 PANELVCC FPVCC 0 OFF R603 1 ON I135 R604 Q114 R605 MMBT3904 C702 ON_PANEL R608 24K C703 0.1U R606 47uf/16V R609 C704 AP9435M R607 2.2K 1000u/16V Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 61 NC(AP1117D25A) SOT223 R628 2_5VM L190 L191 R619 R201/0805 I141 R201/0805 C733 C735 C734 10U/50V R620 IADJ 100U/16V 0.1U GNDP R621 AP1117D25A Q116 C736 SOT223 PHDPWMO 330p MMBT3904 C738 C737 2.2U/50V NC(10U/50V) R629 Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 62 10.11. KEYPAD IR P701 KEY0_MENU KEY1_OK KEY2_UP KEY3_DOWN KEY4_INC KEY5_DEC CON7_2mm P711 LED_R LED_G IR_IN PWRON CON6_2mm S705 S702 S703 S704 S706 S707 D721 I721 CAM-1538TP5 S721 POWER VOL+ VOL- MENU DOWN Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 63: Working Theorem

    The component, composite, or S-Video signals are sampled at a free-run external clock frequency (10~58.6 MHz). After the video decoder processing, the video data was sent out with a line-locked alignment rate (24.576 MHz). The SAA7117 comes with 160-pin QFP package. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 64 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 MSP3410G. The MCU can automatic detect the tuner and send order by serial bus. Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 65 12. Wiring Diagram Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 66 13. PCB Layout Diagrams 13.1. MAIN PCB TOP VIEW Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 67 13.2. MAIN PCB BOTTOM VIE W Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 68 13.3. KEYPAD PCB TOP VIEW 13.4. KEYPAD PCB BOTTOM VIEW Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 69 13.5. IR PCB TOP VIEW Confidential - Do Not Copy ViewSonic Corporation N3250w-G...
  • Page 70 13.6. IR PCB BOTTOM VIEW Confidential - Do Not Copy ViewSonic Corporation N3250w-G...

  • Page 71: Wiring Diagram

    Add.: Fax: Tel: 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) Confidential - Do Not Copy...

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