Service Manual ViewSonic N4251w-1M Model No. VS11502-1M 42” LCD TV (N4251w-1M_SM Rev. 1b Jul.
Copyright Copyright © 2007 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.
TABLE OF CONTENTS 1. Precautions and Safety Notices................................................................. 1 2. Specification.................................................................................................3 3. Front Panel Function Control Description................................................ 8 4. Circuit Description.......................................................................................19 5. Adjustment Procedure ................................................
1. Precautions and Safety Notices 1. Appropriate Operation (1) (2) (3) (4) (5) (6) (7) (8) (9) Turn off the product before cleaning. Use only a dry soft cloth when cleaning the LCD panel surface. Use a soft cloth soaked with mild detergent to clean the display housing. Disconnect the power plug from AC outlet if the product is not used for a long period of time. If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off.
(14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit. 5.2. Handling and Placing Methods Correct Methods: Incorrect Methods: Only touch the metal frame of the LCD panel Surface of the LCD panel is pressed by fingers or the front cover of the monitor. Do not touch and that may cause “Mura” the surface of the polarizer.
2. Specification Parameter LCD Type LCD Interface Resolution (Native) Display Area Pixel Pitch Viewing Angle Contrast Ratio Brightness Response Time Response Time (Gray to Gray) Colors Surface Treatment Colors Surface Treatment Backlight Preset Color Gray Scale Rated Life (Backlight) Specification a-Si TFT Active Matrix Wide Color, Transmissive Mode, Normally Black 1-Channel LVDS WXGA, 1366 x 768 930.25(H)*523.01(V)42.02 inch diagonal mm 0.68 (H) x 0.
2. Video Built-in A/D converter shall provide analog to digital converter for this product. Input Parameter Specification CVBS Characteristics: Video Amplitude Signal 0.7(min.) – 1.1(max.) V DC Level Sync Pulse Typical. 0.3 V S-Video Characteristics: Y : 1.0Vp-p W / Neg. Sync (IN 75 Ω ) Video Amplitude Signal C : 0.285Vp-p (IN 75 Ω ) DC Level Sync Pulse Y, Pb, Pr Characteristics: Y:1.0Vp-p (IN 75 Ω) Video Amplitude Signal Pb:0.7 Vp-p(IN 75 Ω),Pr:0.
Electrical The following table defines the electrical specification of this product. ELECTRICAL SPECIFICATION Power Input Voltage Range 100-240VAC +/- 10% Wide Range 4. Input Frequency Range 47-63 Hz Input Current Efficiency 3.0A @ 115VAC // 1.5A @ 230VAC Max in < 150A (with fully loaded power supply) at 230Vac Shall not result in permanent failure of power supply (including blown fuse) Normal:200 W (Max) // Stand by: < 3.
Memory recall Treble Bass Balance Audio out Surround Auto Scan Tuner Mode Channel Edit Channel Add/Del.
7. Mechanical The following table defines the mechanical specifications of this product for both chassis and cabinet. Parameter Specification Dimension W=942mm, H=726mm and D=295mm Net Weight 33.3Kg Gross Weight 39.4Kg Net weight *without* stand 29.
3. Front Panel Function Control Description ENGLISH Front View of the Product ENTER To highlight a control in OSD menu. CH Up Channel up when source is at TV or select a control while in OSD menu. CH Down Channel down when source is at TV or select a control while in OSD menu. Menu Turn OSD menu ON/OFF. Volume Up Increase sound volume or adjust a highlighted control while in OSD menu. Volume Down Decrease sound volume or adjust a highlighted control while in OSD menu.
ENGLISH Rear View of the Product Power (AC input) Using power cord provided, connect to a power source. Air TV input Connect to NTSC or ATSC TV source. Cable TV input Connect to Cable TV (CATV) or Digital Cable. SPDIF Optical output Connect this port to the SPDIF input of A/V device. HDMI Input Terminal -3 Connect this port to the HDMI output of A/V device. HDMI Input Terminal -2 Connect this port to the HDMI output of A/V device. HDMI Input Terminal -1 Connect this port to the HDMI output of A/V device.
Remote Control ViewSonic Corporation 10 Confidential - Do Not Copy N4251w-1M
A SOURCES Select input source B PIP * PIP: activate PIP feature PIP Source: change PIP source PIP Size: change PIP size C 0~9, -/100 number button Input channel number D RECALL Return to previous channel E GUIDE Show electronic program guide (EPG) F SLEEP * Set timer to turn off TV G CC Close Caption H VOL▲ and VOL▼ Adjust volume I MUTE ENGLISH Remote control button function as follow Mute On/Off J MTS/SAP Select Mono, Stereo or SAP sound K POWER Power On/Off L Device buttons Selec
OSD Functions ADVANCED OPERATION — OSD MENU Video Menu — To adjust the picture quality ENGLISH Video Menu is active in all except the VGA input source. • Contrast: To adjust contrast of video. (right: Max, left: Min). • Brightness: To adjust luminance of video. (right: Max, left: Min). • Color: To adjust color. (right: brilliant color, left: pale color). • Tint: To adjust tint level. (right: greenish tone, left: reddish tone). • Sharpness: To adjust picture sharpness. (right: sharper, left: softer).
Setup Menu — To set up OSD window ENGLISH Setup Menu is active in all input sources. (However, when in VGA input source, there is no “V-Chip” function in the menu.) • Language: To select an OSD language from English, French or Spanish. • Parental: To set up parental control. When you enter this control, the screen below will be displayed. The factory default of the password is “0000”. To enable parental control, input the password, press ▼ button to focus on OK key, and then press ENTER.
Press MENU to return to the previous page. • V-Chip: Press ENTER, and the following screen appears. V-Chip is transmitted from TV station to help parents monitor what their children watch. According to the pre-set of factory, viewers can see all of the channels. However, setting V-Chip can block the appointed channels. The factory default of the password is “0000”. To enable parental control, input the password, press ▼ button to focus on OK key, and then press ENTER. (Select Cancel if you want to exit.
ENGLISH • Block TV Rating: To adjust TV blocking level in the US. You can select between TV-Y, TV-Y7, TV-G, TV-PG, TV-14, or TV-MA. The TV Ratings in the US are defined as following.
CF_E Exempt CF_13ANS This emission can not be appropriate to the children of less than 13 years CF_G General CF_16ANS This emission is not appropriate for less than 16 years CF_8ANS General-Disadvised to CF_18ANS This emission is reserved to the adults the young children 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.
ENGLISH • Digital Closed Caption: To select closed caption signal formats and set up caption modes for digital TV channels. (C1~C4, Service1~Service 6, or OFF) • Digital CC Style: Press ◄► to select Caption Style from As Broadcaster or Custom. When Custom is selected, use ▲▼ to select the desired controls, ◄► to adjust detailed settings. Font Size: To select a font size from Large, Small, or Medium. Font Style: To select different font style from Style 1 to Style 7.
ADVANCED OPERATION — REMOTE CONTROL PIP/POP PIP/POP button allows you to watch two screens from different sources at the same time. (PIP is picture in picture; POP is picture out of picture.) Press PIP on the remote control repeatedly. The screen will change from normal screen → PIP screen → POP screen. POP Screen ENGLISH PIP Screen • PIP Input Source Select 1. Press PIP Source button to select input source for sub-screen as following. (You must press PIP button first.
4. Circuit Description A. Analog Switch and Video input. MT8202 is a highly integrated video and audio single chip processor for emerging HDTV-Ready LCD TV. It includes one 3D/2D TV Decoder recovering the best image from CVBS, and in addition, its analog input also support popular S-Video, Component, VGA video source. On-chip advanced motion adaptive de-interlacer (MDDitm) converts accordingly the interlace video into smooth non-flicking progressive motion pictures.
C. DTV and HDMI. MT5112 is a fully integrated single-chip 8-VSB and 64/256-QAM demodulator. The chip is designed specifically for the digital terrestrial HDTV and CATV receivers. MT5112 includes a 10-bit A/D converter, 8-VSB/QAM demodulator, TCM (Trellis-Coded modulation) decoder, and Reed- Solomon Forward Error Correction decoder. Moreover, an internal controller handles the acquisition and tracking to ensure the best receiving performance.
165 MHz and video resolutions up to 1080p and UXGA. The MT8293 supports the DVD-Audio standard, including 7.1- surround audio at 96kHz and stereo audio at 192kHz. The built-in High-bandwidth Digital Content Protection (HDCP) decryption engine secures the digital link for transmission of valuable high-definition video and audio. Built-in HDCP self-test engine simplifies manufacturing testing.
D. Audio MT8202 incorporates a on-chip audio processor decodes whole world standard audio signals from tuner with lip sync control, delivering high quality post-processed sound effect to customers. Audio interface accept analog audio signal from Tuner, e.g. SIF or AF. It also includes preprocessing circuit to filter the noisy audio signals. Audio decoder will decode the BTSC, and output best sound with enhanced 3D surround post-processing.
5. Adjusting Procedure 1. Function Test 1.1. Product - 42” LCD TV 1.2. Test Equipment -PC signal generator: CHROMA 2525 CARD ,CHROMA 2327 or 2329,Pioneer DV-S969AVi. -TV and Video signal generator. -Color analyzer: MINOLTA CA110. -Power meter: CP-310A or CP-320A. -AC power supply transformer: 110V/120V ±20% 60Hz ±5%. -Digital ammeter 1.3.
3.Under the picture NTSC color bar of YPbPr source, select WHITE BALANCE and press ENTER, The color warm will auto adjust. The act of EHITE BALANCEL is completed when EHITE BALANCEL disappeared. 4.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 1.4.3 Power Consumption Check ( VGA MODE ) A. TIMING: 1360 x 768@60Hz B. Pattern: 1010UPRIGHTNESS PATTERN C. BRIGHTNESS=MAX, CONTRAST=MAX. D.
SPEAKER output is right. Meets earphone with the EARPHONE, Determined whether the action of EARPHONE output is normal. 1.4.11 All Modes Reset 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. TV Frequency Table: U.S.A Channel (TABLE 1) VIF 45.75 MHz, SIF 41.25 MHz (Unit：MHz) Ch.
U.S.A Channe2 (TABLE 2) VIF45.75 MHz, SIF 41.25 MHz Ch. 2 3 4 5A 5 6 A-5 A-4 A-3 A-2 A-1 A B C D E F G H I 7 8 9 10 11 12 13 J K L M N O P Q R S T U V W AA BB CC DD EE FF GG HH II 2 3 4 1 5 6 95 96 97 98 99 14 15 16 17 18 19 20 21 22 7 8 9 10 11 12 13 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 Freq.
1.5. TV receiving test: 1.5.1 TV SIGNAL TEST ITEM CENTRALISM TRANSMITTING SIGNAL CHECK CONTENT SET CONTENT CHECK CHANNEL FREQUENCY (MHz) CONTENT ORDER PATTERN SOUND P/S(dB) 55.25 MONO SCOPE SWEEP TONE -10 ELECTRIC CHANNEL 2 ABNORMITY SOUND 83.25 COLOR BAR 400Hz -10 SOUND ,PICTURE CHANNEL 6 175.25 Full White (100 STEREO -10 STERO FUNCTION CHANNEL 7 IRE) 211.25 STAIR DUAL -10 SUB FUNCTION CHANNEL 13 471.25 MULTIBURST MONO -16 IMAGE AND SOUND CHANNEL 14 DISTURB 603.
TIMING TABLE (FACTORY PRESET MODE) (TABLE 3) 1 2 3 4 TIMING 640 ×480 60HZ 640 ×480 75HZ 800 ×600 60HZ 800 ×600 75HZ Pixel Rate 25.175MHZ 31.500MHZ 40.000MHZ 49.500MHZ H TOTAL 31.778us 26.667us 26.400us 21.333us H DISPLAY 25.422us 20.317us 20.000us 16.162us H B-Porch 1.907us 3.810us 2.200us 3.232us H Width 3.813us 2.032us 3.200us 1.616us H Border 0.318us 0.000us 0.000us 0.000us V TOTAL 16.683ms 13.334ms 16.579ms 13.333ms V DISPLAY 15.253ms 12.800ms 15.
TIMING TABLE (FACTORY PRESET MODE) (TABLE 3) 9 10 TIMING 1360 ×768 60HZ 1280 ×1024 60HZ Pixel Rate 85.5MHZ 108MHZ H TOTAL 20.959us 15.630us H DISPLAY 15.906us 11.852us H B-Porch 2.994us 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 No. No.
2. VGA DDC Key In Procedure Note: 1. Every time after replacing the main board, you have to do the DDC key in. 2. If you find the DDC does not conform to the LCD TV, you have to do the DDC key in. 2.1 Equipment Needed - N4251W(1M) LCD TV DDC Card PC RS-232 cable Barcode Reader VGA Cable N4251W(1M) LCD TV RS-232 Cable DDC Card PC VGA Cable Barcode Reader 2.2 Setup Procedure 2.2.1 Connect VGA Card and DDC Card with RS-232 cable.
2.2.2 Barcode Reader connects with keyboard and PC keyboard port. 2.2.3 Connect DDC Card and N4251W(1M) LCD TV with VGA Cable. (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.
2.3.3 2.3.4 Press “ENTER” key. Input bar code 2.3.5 Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED OK! 2.3.6 Exit program.
3. HDMI DDC Key In Procedure There are three EDID files for the different HDMI connectors. So you must be download the different EDID into each HDMI connector. 3.1 Equipment Needed - N4251W(1M) LCD TV PC RS-232 cable Barcode Reader HDMI Cable N4251W(1M) LCD TV RS-232 Cable PC HDMI Cable Barcode Reader 3.2 Setup Procedure 3.2.1Connect HDMI Card and DDC Card with RS-232 cable.
3.2.2 Barcode Reader connects with keyboard and PC keyboard port. 3.2.3 3.2.4 Connect DDC Card and N4251W(1M) LCD TV with HDMI Cable. 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 .
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 OK! 3.3.6 Exit program.
4. Firmware Upgrade Procedure When you receive the returned LCD TV, please check whether the firmware version is the latest. If not, please do the following procedures to upgrade it to the latest version. 4.1 Equipment Needed - N4251W(1M) LCD TV - Fixture for Firmware Upgrade - VGA Cable - PC (Personal Computer) - Firmware Upgrade Program - One additional LCD TV for checking the program execution N4251W(1M) ISP FIXTURE PC 4.2 Installing the USB device driver.
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.
4.5.4 Enable the USB Bridge. 4.5.5 Browsing the File to download.
4.5.6 Press Upgrade to download file. Note : 1. The Baud Rate is auto setting if mismatch found between your platform and Mtktool. 2. You can 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.
Packing For Shipping And Disassembly Procedure Packing For Shipping 1. Packing Procedure 1.1 Paste protection film to protect the LCD TV. (Figure 1) 1.2 Put the LCD TV in the PE bag and seal the bag. (Figure 2) Figure 1 Figure 2 1.3 Put the cushions on the LCD TV and put all the accessories into the carton. (Figure 3) 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.
PACKING PART LIST ( N4251w-1 ) ViewSonic Model Number: VS11502-1M Rev: 1a Item ViewSonic P/N 1 N/A 2 P-00008063 3 P-00008104 4 P-00008105 5 P-00008106 6 P-00008107 7 P-00008064 8 DC-00008106 9 DC-00008107 10 A-00005362 11 CB-00003425 12 N/A 13 A-VC-0101-0386 14 P-00004497 15 P-00008103 16 N/A 17 N/A 18 A-00008027 ViewSonic Corporation 41 Confidential - Do Not Copy N4251w-1M Ref.
Disassembly Procedure 1. Disassembly of Stand and Dust Cover from LCD TV. 1.1 Unscrew 4 screws that secure Stand Unit and detach Dust Cover from the LCD TV. Stand 2. Disassembly of Rear Cover. 2.1 Pull the Holder from the LCD TV. 2.
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 ViewSonic Corporation Fig.
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.
3.2. Unscrew 4 screws to remove speaker.
3.3. Remove the function key ass’y. 3.4. Unscrew 18 screws to remove Front Cover and Bracket Fix.
3.5. Unscrew 17 screws to remove metal fiting vesa support.
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.
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.
Panel Unit ViewSonic Corporation 50 Confidential - Do Not Copy N4251w-1M
6. Trouble Shooting Flow Chart 6.1.
6.2. NO POWER No Connect the wire START Chcek P805 5V,12V No Check Wire Connection on power board is OK? Yes Replace Power Board Yes Check 3.3V is on C113? No Replace I101 Yes 1.
Check Video wave form is on I804 Pin21 ? YPb Pr No Replace I804 Yes Check Q802,C886 is OK? Check L816,R172,R173,C332,C33 4 is OK? S-VIDEO No Replace L816,R172 R173,C332,or C334 Yes No Yes AV Replace Q802 or C886 Yes No Check L821,R203,C335 is OK? No No Replace L819,R197 or C340 Replace L821,R203, or C335 53 Check I106 has output signal at Pin13~22 of P803 ? Check L819,R197,C340 is OK? Confidential - Do Not Copy NTSC TV N4251w-1M 6.3.
DTV Check Inner RF cable is OK? HDMI No Check HDMI Cable is well connected ? Replace Inner RF cable Yes No Connect the cable Yes Check +30V on Pin9 +5V on Pin17 of I804? No Replace I804 or I119 Check 27MHz is on Pin4 of I115? No Check I106 Yes Yes Check I807 has output signal at RP80~RP82 No Yes Replace I807 Check I114 is defective Replace I114 No Yes Check X801 has 27MHz clock output No Check I115 has output signal at RP25~RP30? Replace X801 No Replace I115 Yes Yes Check I127
DDR SDRAM AIR Flash DDR SDRAM CABLE SPDIF (Optical) RF SWIT CH MT5351 (Mpeg decoder) MT5112 (Demod.) LCD Module COMBO T uner Confidential - Do Not Copy N4251w-1M 7. Block Diagram NT SC 55 HDM I 1 HDM I 3 HDMI SWITCH MT8293 (HDMI Rx) MT8202 Flash AV(CVBS) DDR SDRAM S-Video2 YPbPr DDR SDRAM PC(D-Sub) AV/SV Audio (RCAx2) YPbPr Audio(RCAx2) PC Au dio(mini jack) CD4052 (Audio sw.) AD12250 (A/D converter) AD8256 (Audio Amp.
8. Schematic Diagrams 8.1. DC POWER 5VSB VCC 9 8 7 6 R121/0805 6A VCC R101 10K POWER_EN Q101 R103 PWM1 9 8 7 6 SOT C 3 2 E 23 4.7K HOLE/GND 2 3 4 5 9 8 7 6 2 3 4 5 BL_ON_OFF 1 B Initial pull up 0.1U GNDP R102 10K 2 3 4 5 2 3 4 5 9 8 7 6 H100 1 1000U/16V/LowESR C106 C107 + HOLE/GND H101 5VSB 1 IADJ BL_ON_OFF GNDP 1 2 3 4 5 6 7 8 9 10 11 12 L218 R121/0805 6A 1 L234 + 1 C805 4.7uF/50V P804 Hi Enable MMBT3904 2.0MM 5VSB H102 R110 4.
8.2. DC TO DC L101 + 5VSB L219 Output Output 2 C112 0.1U C0603 AP1510 FB This voltage must be arround 1.95v. R121/0805 6A 30uH D152 0.7m/m R517 3.65K 1% SR54 OCSET EN SB33A L102 1 L103 SB18 C781 0.1U C0603 ASB33A C782 0.1U C0603 1 3 2 VCC C780 0.1U C0603 VSS VSS R516 + C110 220U/16V 20K CE050080 C109 0.1U SB33A 6 5 + C113 100U/16V CE025050 C111 + ASB33A + IN 4 OUT ADJ AZ1117/adj R121/0603 3A C117 47U/16V SB18A R60/0603 300mA SB18A I102 C114 0.
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8.4. MT8202 DDR MEMORY & FLASH DV25B A_DQS[0..3] A_RA[0..11] A_BA[0..1] A_DQM[0..1] A_DQ[0..31] A_DQS[0..3] A_RA[0..11] A_BA[0..1] A_DQM[0..1] A_DQ[0..
8.5. MT8202 ANALOG DECOUPLING NORMAL ANALOG POWER STANDBY ANALOG POWER XTALVDD XTALVDD 3 ASB18A ASB18A L113 R60/0603 300mA L114 XTALVDD ADCVDD AVICM PWM2VREF ADCVDD 3 AVICM 3 PWM2VREF 3 AVICM V2 R121/0603 3A C226 10U/50V C228 1U C229 4.7U C230 0.1U C0603 LVDS_GND C227 10U/50V + C231 1U C232 4.7U C233 0.
8.6. MT8202 DIGITAL DECOUPLING MT8202 DIGITAL POWER & DECOUPLING SB33A SB18A SB18A DV18A C286 0.1U C293 0.1U C0603 C287 0.1U C294 0.01U C0603 C288 3300P C0603 DV33A ViewSonic Corporation C300 100U/16V C304 0.1U 61 C290 0.1U C0603 C291 0.1U C0603 C292 0.1U C0603 C296 3300P C0603 C297 3300P C0603 C298 3300P C0603 C295 3300P C0603 5VSB + C289 0.1U C0603 Confidential - Do Not Copy C305 0.1U C306 0.1U N4251w-1M C301 0.1U C0603 C302 0.1U C0603 C303 0.
8.7. COMBO TUNER VCC 3 2 P802 F-CON F-CON/5P/DIP/P8.0/R 1 I801 AIR INPUT 4 3 8 9 5 13 14 2 P808 F-CON F-CON/5P/DIP/P8.0/R INA GND POWER GND OUT GND GND INB SELECT 1 C801 0.1uF C0603/SMD C816 10uF/50v + C10UF16V/D5H11 2 3 10 11 12 7 VCC P807 F-CON F-CON/5P/DIP/P8.0/R 1 RF_SWR 5 TO DTVS205CH201A 4 IC G6Y RELAY 1 RF_SWR R814 Q801 10K R0603/SMD B 3 C SOT 23 CABLE INPUT 4 R815 4.7K READY# 1 E 2 5 MMBT3904 R0603/SMD C892 0.
8.8. AUDIO/VIDEO IN CIRCUIT CVBS0 CVBS1 SY0 SC0 Y0+ Y0PB0+ PB0PR0+ PR0SOY0 MPX1 CVBS0 CVBS1 SY0 SC0 Y0+ Y0PB0+ PB0PR0+ PR0SOY0 3 3 3 3 3 3 3 3 3 3 3 MPX1 3 THIS PAGE NEARLY IC R171 AVCVBS0 R170 0 C331 0.047U C333 330P R172 VFE_GND1 AVCVBS1 R174 0 C335 AVY0P CVBS1 0.047U R173 C332 4.7n SOY0 68 C334 0.01U Y0+ 0 C336 15P C337 330P TO MT8202 NC AVSOY0 CVBS0 AVY0N R175 100 C338 0.01U Y0- AVPB0P R176 68 C339 0.
8.9. INPUT SOURCE 0 AVSOY0 YPBPR0L_IN 2 R185 L816 D101 Y0_IN AVY0P D805 YPBPR/AV Input. 2.2uH (NC)5.6V R187 100K 1 R188 75 C354 0.01U 10p P101 Y_GND 4 PR0_IN 3 PB0_IN YPBPR0R_IN R533 0 2 6 AVY0N D102 C355 0.01U (NC)5.6V 2 Y0_IN 1 AV0_IN L817 2.
8.10. HDMI INPUT-MT8293 VI[0..23] VI[0..23] AVCC 3,12 DV33B L140 HDMICEN HDMIODCK HDMIDE HDMIHSYNC HDMIVSYNC CCIR_GPIO_D GPIO17 SCL SDA AVCC HDMICEN 3 HDMIODCK HDMIDE 3,12 3,12 HDMIHSYNC HDMIVSYNC 3,12 3,12 CCIR_GPIO_D 3 R121/0603 3A L141 C360 I113 + C362 SCL SDA 3,13,23,26 3,13,23,26 3 12 12 12 12 HDMISD1 HDMISD2 HDMISD3 HDMISD1 HDMISD2 HDMISD3 3 3 3 4 IOVCC R121/0603 3A OUT + C363 3 DATA2+ 100U/16V 2 DATA2DATA1+ 1 ADJ AIC117-1.
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8.12. ATSC INDEX 5VDD 14,15 5VDD 15,17 15,17 15,17 15,17 U0RX U0TX U2TX U2RX U0RX U0TX U2TX U2RX DV33 14,15,17,18 DV33 GND 7,13,14,15,16,17,18 GND VOHSYNC VOVSYNC VODE VOPCLK UART (RS232) 15 15 15 15 15 15 15 VOR[0..7] VOG[0..7] VOB[0..7] VOPCLK VOHSYNC VOVSYNC VODE VOR[0..7] VOG[0..7] VOB[0..
8.13. MT5112 ASIC C828 10nF C0603/SMD AVDD33 AVDD33 C829 0.1uF C0603/SMD C830 0.1uF C0603/SMD C831 10uF/10v C0805/SMD C832 0.1uF C0603/SMD DVDD18 REFTOP AVDD33 AVDD3 AVDD33 L807 C833 0.1uF C0603/SMD R121/0603 3A L0603 R828 1M R0603/SMD GLOBAL SIGNAL C834 18pF C0603/SMD C835 18pF C0603/SMD XTAL2 XTAL1 AVDD33 IF_AGC 7 IF_AGC FAT_IN+ FAT_IN- 7 FAT_IN+ 7 FAT_IN- TUNER_SCLO TUNER_SDAO 7 TUNER_SCLO 7 TUNER_SDAO DVDD33 DVDD18 DVDD33 DVDD18 NC GPIO1(P1.
8.14. ATSC POWER L150 I118 5VDD DV33_DM R121/0805 6A L227 C420 0.1U C0603 3 OCSET 2 EN AP1510 6 5 2 C783 0.1U C0603 VCC 30uH D153 0.7m/m R521 3.65K 1% SR54 VSS VSS R520 20K Output Output C784 + C803L0805 470U/16V 0.1U C0603 CE050080 yc5d18 L829 +5V_TUNER 10 UH SMD + C417 100U/16V C419 0.1U FB 1 R522 1.15K 1% 7 8 R519 3.9K VCC 1 4 C883 + C804 470U/16V 0.1U C0603 CE050080 POWER SUPPLY +3V3 FOR MT5112 DV33 AV33 L153 R121/0603 3A L0603 C426 0.
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8.16.
8.17. MT5351 FLASH I131 PDA1 PDA2 PDA3 PDA4 PDA5 PDA6 PDA7 PDA8 PDA9 PDA10 PDA11 PDA12 PDA13 PDA14 PDA15 PDA16 PDA17 PDA18 PDA19 PDA20 PDA21 PDA22 POCE0_1 POOE0_1 POWE_1 DV33 R296 4.
8.18. MT5351 PERIPHERAL DV33 MTK MODIFIED X103 C552 TP70 CAPVGND TP/SMD/D0.6 CAPVPLL AV33 OPWM0 AV33 APLLCAP0 APLLCAP1 5600P C0603 C557 1500P C0603 C558 1500P C0603 R312 (NC)50 R0603 R311 8.2K R0603 R313 (NC)50 R0603 C554 0.01U C0603 C555 1n C0603 C556 47P C0603 CAPVGND ATP1 1 CVIN 2 TRI-STATE 3 GND VDD 6 NC 5 OUT 4 C553 0.1U C0603 ATP2 R315 (NC)10 R0603 HIGH ===>> OPERATING LOW ===>> HIGH IMPEDENCE DV33 C559 10U/50V CE025050 C560 4.7U C0805 C561 0.1U C0603 C562 0.
8.19.
8.20. AUDIO ADC AUDIO ADC VCC L179 + ADCVA C634 10U/50V ADCVL ADCVA R121/0603 3A + C635 10U/50V ADCVD L180 R121/0603 3A C637 0.1U DV33B ADCVD C638 1U C639 0.1U + ADCVL R121/0603 3A L181 ADCVL C802 47U/16V C640 1U R367 10K C641 0.1U R492 R368 10K ADCM0 ADCRST_1 R370 (NC)10K ADCM1 R371 (NC)10K R372 (NC)10K ADCVA C642 0.1U C643 0.1U R373 634 1% C644 470P ADCVA ADCVL 4 R374 100K + 10K C646 1 4.7U/50V 3 R378 90.
8.21. AUDIO DAC TO ERAPHONE OUTPUT 3 3 MTK modify R415 BYPASS AUDIO OUTPUT OP1VREF C678 150P ADD R406 47K R419 0 C679 10U/50V R420 10K R421 5.1K + AR R121/0805 6A 4 L211 2 R524 + VIDEO_OUT VIDEO_OUT 3 C669 220U/16V 47K + 1 OP1VREF C665 3 C681 820P 10U/50V I139A OP1VREF AUDIO_OUT2_R NJM4558 OPA 8 12V OPA1V120 4 OPA1V120 20K + AL AR - AL AR I139B MTK modify R424 C685 150P R426 0 C686 10U/50V R427 10K R428 5.
8.22. VGA IN & PC AUDIO IN NEARLY VGA CON 3 3 3 3 3 3 VGASOG VGASOG VGAHSYNC_1 VGAVSYNC_1 VGAHSYNC_1 3 VGAVSYNC_1 3 L822 RED 3 DLSW2 VGAL_IN VGAR_IN VGAL_IN VGAR_IN VFE_GND GNDA NEARLY IC VGA IN 19 19 VFE_GND 2,3,5,8 GNDA 3,5,21 VGASDA_IN 12 HSYNC_1 13 VSYNC_1 14 VGASCL_IN 15 C608 0.01U RED+ R324 100 C610 0.01U RED- R325 0 C611 4.7n VGASOG R327 68 C612 0.01U GREEN+ R329 100 C614 0.01U GREEN- R335 68 C615 0.01U BLUE+ 100 C619 0.
8.23. AUDIO AMP L182 R121/0603 3A L183 R121/0603 3A RA L202 12V VCC L200 R121/0805 6A VDDSUB C675 0.1U C885 + C0603 470U/16V CE050080 L212 R121/0805 6A GNDP VDDLR C683 0.1U C884 + C0603 470U/16V CE050080 C677 0.1U C0603 C682 0.1U + C749 C0603 470U/16V L0805 CE050080 L201 C680 0.1U C0603 R402 C661 NC C0603 YC124RT I148 + C671 47U/16V CE0250050 C662 C666 0.1U + C750 C0603 470U/16V CE050080 C672 C674 + 3 IN 4 0.1U C684 0.1U C0603 L+ 3_3AMP R394 C676 0.
8.24. IR & KEYPAD MTK modify ֺޏאױለ൷२ऱ standby 3.3V شDV33B standby ழᄎሽ SB33B 5VSB R458 EXCHANGE R459 150 R460 150 Q120 R462 MMBT3906 4.7K RED_LED 1 2 Q121 MMBT3906 C726 C727 47U/16V 0.1U 1 3 5VSB 47 R461 1K 2 R463 4.7K 3 GREEN_LED UP3_0 GREEN_LED GPIO10 GPIO11 RED_LED GPIO13 GPIO14 GPIO15 GPIO16 IRRCVR R465 R466 R467 R468 R469 R470 C728 C729 C730 C731 C732 C733 C734 Confidential - Do Not Copy P113 8P_2mm 1 2 3 4 5 6 7 7P_2mm 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.
8.25. PANEL INTERFACE PANELVCC P803 GPIO2 CLK1+ CLK1- GPIO2 3 CLK1+ CLK1- 3 3 AP[0..3] AP[0..3] 3 AN[0..3] AN[0..
8.26. SYSTEM EEPROM SB33B RESET# Circuit SCL SDA R425 4.7K R503 4.
9. PCB Layout Diagrams 9.1.
9.2.
ViewSonic Corporation 84 Confidential - Do Not Copy N4251w-1M 9.3.
ViewSonic Corporation 85 Confidential - Do Not Copy N4251w-1M 9.4.
ViewSonic Corporation 86 Confidential - Do Not Copy N4251w-1M 9.5.
ViewSonic Corporation 87 Confidential - Do Not Copy N4251w-1M 9.6.
ViewSonic Corporation 88 Confidential - Do Not Copy N4251w-1M 9.7.
ViewSonic Corporation 89 Confidential - Do Not Copy N4251w-1M 9.8.
10.
ViewSonic Corporation 91 Confidential - Do Not Copy N4251w-1M
EXPLODED PARTS LIST (N4251w-1) ViewSonic Model Number: VS11502-1M Rev: 1a Serial No.
11. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (N4251w-1) ViewSonic Model Number: VS11502-1M Serial No. Prefix: QEM Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 ECR/ECN Power Cord AC Remote Control] Remote Control PC Board Assembly: [All Sub Board (PCB ASS'Y) Main Board PCBA] Control Board Power Supply Board Sub Board (IR Board) Cabinets: [Front Panel, Back Front Panel (PZ2-608-80) Cover, Base] Back Cover Cable RCA 3P(Y/R/W) 2562#26 1.
BOM LIST (N4251w-1) ViewSonic Model Number: VS11502-1M Rev: 1a Serial No.
Item 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 ViewSonic P/N N/A P-00008063 DC-00008106 DC-00008107 P-00004497 P-00008064 N/A N/A N/A N/A N/A N/A E-C-0404-3096 E-C-0404-3096 N/A N/A N/A N/A E-00000999 N/A N/A N/A N/A N/A N/A N/
Item 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A E-00000999 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A E-C-0404-
Item 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Item 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Item 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A E-C-0404-3898 N/A N/A N/A N/A N/A N/
Item 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Item 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 ViewSonic P/N N/A N/A E-C-0404-3096 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A E-C-0404-4423 N/A N/A
Item 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A E-D-0403-1779 E-D-0403-2808 N/A E-D-0403-1779 E-
Item 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 ViewSonic P/N E-IC-0401-2745 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A E-00008040 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/
Item 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Item 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Item 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 ViewSonic P/N E-Q-0402-1624 E-Q-0402-1608 E-Q-0402-1087 E-Q-0402-1624 E-Q-04
Item 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 ViewSonic P/N E-R-0405-6419 E-R-0405-6419 E-R-0405-6600 E-R-0405-6600 E-R-04
Item 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 ViewSonic P/N N/A N/A N/A N/A E-R-0405-6413 E-00003527 E-00003527 E-00003527
Item 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 ViewSonic P/N N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A E-00003527 E-00003
Item 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 ViewSonic P/N N/A E-R-0405-6600 N/A N/A N/A N/A E-R-0405-6419 E-R-0405-6419
Item 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 ViewSonic P/N M-SW-0815-0182 M-SW-0815-0182 M-SW-0815-0182 M-SW-0815-0182 M-SW-0815-0182 M-SW-0815-0182 N/A N/A N/A N/A B-00008089 E-00008080 N/A N/A N/A N/A Ref.
* Reader’s Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation. Assessment A. What do you think about the content of this Service Manual? Unit Excellent Good Fair Bad 1. Precautions and Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5. Adjustment Procedure 6.
