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ViewSonic N2750w-2G, Service Manual

The ViewSonic N2750w-2G is a high-quality HD LCD television offering exceptional visuals and immersive audio. Unlock the full potential of this versatile device with the comprehensive Service Manual. Easily download the free user manual from our website, enabling you to get the most out of your viewing experience.

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Item

ViewSonic P/N

STATUS

Ref. P/N

Location

Universal number# Q'ty

Description

163

N/A

N/A

2346110496P CAP,CHIP 125'C

CS  0603/X7R/50V    0.1u  K  T

C557

1

164

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

C560

1

165

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2341120096P CAP,CHIP 125'C

CS  0603/COG/50V     20p  J  T

C600

1

166

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2346733496P CAP,CHIP 85'C

CS  0603/Y5V/16V   0.33u  Z  T

C602

1

167

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2346733496P CAP,CHIP 85'C

CS  0603/Y5V/16V   0.33u  Z  T

C603

1

168

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2346733496P CAP,CHIP 85'C

CS  0603/Y5V/16V   0.33u  Z  T

C604

1

169

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2346733496P CAP,CHIP 85'C

CS  0603/Y5V/16V   0.33u  Z  T

C605

1

170

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CS  0603/X7R/50V    0.1u  K  T

C606

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171

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CS  0603/Y5V/16V   0.33u  Z  T

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172

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C610

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C612

1

176

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CS  0603/X7R/50V    0.1u  K  T

C614

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177

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C616

1

178

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C620

1

179

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2341156096P CAP,CHIP 125'C

CS  0603/COG/50V     56p  J  T

C621

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180

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CS  0603/COG/50V     56p  J  T

C622

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181

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CS  0603/COG/50V     56p  J  T

C624

1

182

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2341182996P CAP,CHIP 125'C

CS  0603/COG/50V    8.2p  D  T

C625

1

183

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2341182996P CAP,CHIP 125'C

CS  0603/COG/50V    8.2p  D  T

C626

1

184

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2346133296P CAP,CHIP 125'C

CS  0603/X7R/50V   3300p  K  T

C627

1

185

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CS  0603/X7R/50V   3300p  K  T

C628

1

186

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CS  0603/X7R/50V    0.1u  K  T

C630

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187

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CS  0603/X7R/50V   1000p  K  T

C640

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188

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CS  0603/X7R/50V   1000p  K  T

C644

1

189

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CS  0603/X7R/50V    0.1u  K  T

C651

1

190

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CS  0603/X7R/50V    0.1u  K  T

C652

1

191

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CS  0805/X7R/50V   0.01u  K  T

C654

1

192

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CS  0603/X7R/50V    0.1u  K  T

C658

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193

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C660

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194

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C661

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195

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C664

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196

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CS  1206/X7R/50V    0.1u  K  T

C667

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197

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CS  0805/X7R/50V   0.01u  K  T

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C670

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CS  1206/X7R/50V    0.1u  K  T

C672

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CS  0603/X7R/50V    0.1u  K  T

C674

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202

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CS  1206/X7R/50V    0.1u  K  T

C677

1

203

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CS  0805/X7R/50V   0.01u  K  T

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1

204

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CS  0603/X7R/50V    0.1u  K  T

C684

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205

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2341139196P CAP,CHIP 125'C

CS  0603/COG/50V    390p  J  T

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1

206

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CS  0603/COG/50V    680p  J  T

C690

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CS  0603/COG/50V    470p  J  T

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1

208

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2346133296P CAP,CHIP 125'C

CS  0603/X7R/50V   3300p  K  T

C698

1

209

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CS  0603/X7R/50V   3300p  K  T

C699

1

210

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2341120096P CAP,CHIP 125'C

CS  0603/COG/50V     20p  J  T

C700

1

211

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2341120096P CAP,CHIP 125'C

CS  0603/COG/50V     20p  J  T

C701

1

212

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2346110496P CAP,CHIP 125'C

CS  0603/X7R/50V    0.1u  K  T

C902

1

213

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CS  0603/X7R/50V    0.1u  K  T

C906

1

214

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CS  0603/X7R/50V    0.1u  K  T

C908

1

215

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CS  0603/X7R/50V    0.1u  K  T

C909

1

216

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CS  0603/X7R/50V    0.1u  K  T

C910

1

217

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CS  0603/X7R/50V    0.1u  K  T

C912

1

218

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CS  0603/X7R/50V    0.1u  K  T

C914

1

219

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CS  0603/X7R/50V    0.1u  K  T

C915

1

220

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2346110496P CAP,CHIP 125'C

CS  0603/X7R/50V    0.1u  K  T

C918

1

221

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2346110496P CAP,CHIP 125'C

CS  0603/X7R/50V    0.1u  K  T

C922

1

222

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2364505636P DIODE,ZENER SMD

BZV55-B5V6 2%  SOD-80C PHILIPS

D108      RD

1

223

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N/A

2364505636P DIODE,ZENER SMD

BZV55-B5V6 2%  SOD-80C PHILIPS

D109      RD

1

224

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2364505636P DIODE,ZENER SMD

BZV55-B5V6 2%  SOD-80C PHILIPS

D110      RD

1

225

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N/A

2364505636P DIODE,ZENER SMD

BZV55-B5V6 2%  SOD-80C PHILIPS

D111      RD

1

226

N/A

N/A

2364600496P DIODE,SWITCH SMD

MM4148  SOD80C          GRANDE

D112      RB

1

227

N/A

N/A

2364600496P DIODE,SWITCH SMD

MM4148  SOD80C          GRANDE

D113      RB

1

228

N/A

N/A

2364505636P DIODE,ZENER SMD

BZV55-B5V6 2%  SOD-80C PHILIPS

D114      RD

1

229

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N/A

2364505636P DIODE,ZENER SMD

BZV55-B5V6 2%  SOD-80C PHILIPS

D115      RD

1

230

N/A

N/A

2364302496P DIODE,SCHOTTKY(SMD)

SM17  DO-214AC          MOSPEC

D116

1

231

N/A

N/A

2364505636P DIODE,ZENER SMD

BZV55-B5V6 2%  SOD-80C PHILIPS

D117      RD

1

232

N/A

N/A

2364302496P DIODE,SCHOTTKY(SMD)

SM17  DO-214AC          MOSPEC

D118

1

233

N/A

N/A

2364600496P DIODE,SWITCH SMD

MM4148  SOD80C          GRANDE

D201      RB

1

234

N/A

N/A

2364600496P DIODE,SWITCH SMD

MM4148  SOD80C          GRANDE

D202      RB

1

235

N/A

N/A

2364600496P DIODE,SWITCH SMD

MM4148  SOD80C          GRANDE

D301      RB

1

236

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D504

1

237

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D506

1

238

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D507

1

239

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D508

1

240

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D511

1

241

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D513

1

242

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D519

1

243

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D520

1

244

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D521

1

245

N/A

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2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D522

1

246

N/A

N/A

2349900996P CAP,CHIP SPEC

0603V-PORT  10P+-10%     INPAQ

D523

1

ViewSonic Corporation

                                                         

Confidential - Do Not Copy

       

N

27

50w-

2G

 

77

Summary of Contents for N2750w-2G

Page 1: ...Service Manual ViewSonic N2750w 2G Model No VS11404 1G 27 LCD TV N2750w 2G_SM Rev 1a Sep 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 ...

Page 2: ...nd specifically disclaims any warranty of merchantability or fitness for any particular purpose 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 Trademarks Optiquest is a registered trademark of ViewSonic Corporation ViewSonic is a registered ...

Page 3: ...rcuit Description 20 5 Adjustment Procedure 22 6 Trouble Shooting Flow Chart 48 7 Block Diagram 52 8 Schematic Diagrams 53 9 PCB Layout Diagrams 65 10 Exploded Diagram And Exploded Parts List 71 11 Recommend Spare Parts List 74 ViewSonic Corporation Confidential Do Not Copy N2750w 2G ii 2 Specification 4 ...

Page 4: ...ting from input connector 3 Wipe off water drop immediately Long contact with water may cause discoloration or spots 4 When the panel surface is soiled wipe it with absorbent cotton or other soft cloth 5 Since the panel is made of glass it may break or crack if dropped or bumped on hard surface 6 Since CMOS LSI is used in this module take care of static electricity and insure human earth when hand...

Page 5: ...hods Correct Methods Incorrect Methods Only touch the metal frame of the LCD panel or the front cover of the monitor Do not touch the surface of the polarizer Surface of the LCD panel is pressed by fingers and that may cause Mura Take out the monitor with cushions Taking out the monitor by grasping the LCD panel That may cause Mura ViewSonic Corporation Confidential Do Not Copy N2750w 2G 2 ...

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 Confidential Do Not Copy N2750w 2G 3 ...

Page 7: ...g Sag or Smearing artifacts when driven by the specified video cards see 7 1 General Test Equipment in the primary mode VGA at 60 Hz and after user adjustment b No image drift or lose fine tune settings due to panel temperature change Note Panel performance characteristics MUST BE met in all display modes inputs at standard test conditions 1 RF Tuner RF tuner of this product shall be provided by L...

Page 8: ...roduct shall be provided by TI with a Model Number of TPA3002D2PHPR TQFP48 MST5151A LF for N2750w 2G shall be used as sound processor In addition a pair of speakers shall be integrated within this product The audio signals of this product shall comply with the specification listed in the following table Parameter Specification Phone Jack out Tuner Input Base band Input Speaker Power Output Max Rat...

Page 9: ...uded Efficiency 70 full load nominal line Leakage Current 0 5mA 240VAC Power Saving DPMS N A Recovery Time 3 sec Power Factor Correction Compliant with EN60065 5 Firmware OSD The product firmware of VS11404 1G shall have a firmware version of V P01 Any changes revisions afterward shall also be pre approved by ViewSonic in written For VS11404 1G its firmware shall have a built in frequency table fo...

Page 10: ...when in other source MTS Selcetion on Mono Stereo and Sap sound Sleep Set TV Power off time Info Display current source input information Mute Mute On or Off sound 0 9 100 Direct channel key number Return Return to last channel Guide Electric program guide on Digital TV CH up down Adjust channel up or channel down Volume Adjust the Volume levels Up Down Left Right arrows Select or adjust the funct...

Page 11: ...deo hot key 7 Mechanical The following table defines the mechanical specifications of this product for both chassis and cabinet Parameter Specification Dimension W 680mm H 540mm and D 243mm Net Weight 14 6kg Chassis Plastic Material ABS CABS HB ABS VO PC ABS External Plastic Chassis Components Plastic Chassis Cover Stand Lens and Button Internal Plastic Cabinet Components N A Exterior Chassis Colo...

Page 12: ...xture color The maximum acceptable gap between the buckets to bezel plastic pieces shall be within 1 5 mm The maximum acceptable gap between LCD panel and bezel shall be within 2 5 mm 8 Environmental Operating Temperature 0 C to 40 C Storage Temperature 20 C to 60 C Operating Relative Humidity 65 non condensing Storage Relative Humidity 85 non condensing Operating Altitude 0 to 3 000 meters above ...

Page 13: ... while in OSD menu CH Up Channel up when source is at TV or select a control while in OSD menu ENTER To highlight a control in OSD menu Power ON OFF button Power LED Indicator Remote Control Receiver 1 3 2 4 5 6 7 8 Note 1 Press VOL and MENU buttons at the same time to lock power button and press VOL and MENU buttons again to unlock it 2 Press VOL and VOL buttons at the same time to lock OSD menu ...

Page 14: ...ut for AV or S Video Connect external audio to this port Audio Input for YPbPr Components Connect external audio to this port Audio Output Connect external speaker into this jack PC Audio Input Connect this port to PC line out jack Earphone Jack VGA 15 pin Signal Input Connect to a computer HDMI Input Terminal Connect this port to the HDMI output of A V device Power Input AC Input Connect to LCD T...

Page 15: ...Remote Control ViewSonic Corporation Confidential Do Not Copy N2750w 2G 12 ...

Page 16: ...creen s position 16 RED Enter program name edit function 17 GREEN Add desired channels 18 YELLOW Erase desired channels 19 BLUE Confirm edited name 20 VOL UP DOWN Adjust volume up or down 21 SMART S Select situation mode for sound 22 SMART P Select situation mode for picture 23 PROGRAM UP DOWN Select up or down programs 24 MENU OSD menu ON OFF 25 ASPECT Aspect ratio used to select image size 26 UP ...

Page 17: ... Press ENTER to confirm selection SWAP Press SWAP to exchange main screen to sub screen PIP Size Select Press P SIZE to select the size of sub screen The function only acts on PIP PIP Position Select Press P POS to select the position of sub screen The function only acts on PIP Adjust Volume of Sub screen Press V and V to adjust volume of sub screen Select Program for Sub screen Press P and P to se...

Page 18: ...tive in all input sources Source To select the sound source from main screen or sub screen by pressing Note It is available in SCART1 SCART2 SCART2 SVIDEO However in other input sources it is only active when in PIP POP condition Bass To adjust bass It is active in TV SCART1 SCART2 SCART2 SVIDEO However in other input sources it is only active when sound mode is in User condition Treble To adjust ...

Page 19: ...V system PAL D K Manual Store The function is to give a minute search for possible existing channels and store them in memory 1 Press or to get into Manual Store 2 Move the cursor to Prog No and select the desired channel position with 3 Move the cursor to System and select the system according to your local area with 4 Move your cursor to Search and search the detectable channels with 5 Move your...

Page 20: ... to move your cursor to Name Use to select the desired letter and use to move the cursor to enter next letter To confirm the name press blue button 2 To Erase Add channels Use to select the desired channel Press yellow button to erase the channel or press green button to add it When using Program button the channels you erased will be passed over You may press green button to add the erased channel...

Page 21: ...s in All mode Auto Adjust Auto adjust picture s horizontal position vertical position fine tune and H Size with Contrast To adjust foreground luminance of video Brightness To adjust background luminance of video H Position To adjust horizontal position of video V Position To adjust vertical position of video Clock To adjust delay time of clock in order to reduce the noise of picture Phase To adjust...

Page 22: ...the OSD after a preset period of time passed Use to preset the time from 5 to 60 seconds Halftone To adjust background transparency of OSD 1 Press or to get into Colour Mode 2 Use to select between Cool sRGB User Normal and Warm 3 When select User it allows you separately adjust the colour of red green and blue Colour Mode To adjust colour temperature ViewSonic Corporation Confidential Do Not Copy...

Page 23: ... saving 100 lead LQFP surface mount Pb free plastic package and is specified over the 0 o C to 70 o C temperature range B Video Decoder video The SAA7117 is a highly integrated NTSC PAL and SECAM video decoder support for high quality LCD TV video applications SAA7117 supports NTSC PAL chroma and luma separation using a 2 dimensional adaptive comb filter for reducing the cross luma and cross chrom...

Page 24: ... 2 2 pull down and 3D de interlacing Desk and ceiling mode for projector application PWM Pulse Width Modulators from 28K to 100Hz D Audio Three audio sources put into MSP 4410G which fist select the sources and do pre amplify The bass treble control also is provided The control of all the functions is accomplished by serial bus Audio amplifier put into IC TI TPA3004D2 is a class D amplifier that i...

Page 25: ...d ENTER at the same time then go into the FACTORY MODE Fig 1 Fig 2 D As shown in Fig 1 press ENTER key and Fig 2 will show After EEPROM INIT disappears the procedure of EEPROM INITIAL is completed and the OSD moves to WHITE BALANCE 1 4 2 COLOR TEMPERATURE ADJUSTING PC MODE A Timing 1360 768 60Hz B Pattern 16 gray scale and all white screen C Confirm that the TV uses BURN IN screen and the warm up ...

Page 26: ...ing PAL OR NTSC B Pattern Color bar When in the color bar screen the cursor will point to WHITE BALANCE as shown in Fig 3 After WHITE BALANCE disappears the performing of WHITE BALANCE is completed Normal 9300 x 0 285 0 015 y 0 293 0 015 Warm 6500 x 0 313 0 015 y 0 329 0 015 COOL 12000 x 0 271 0 015 y 0 278 0 015 1 4 4 POWER SAVING TEST A Timing 640 480 75Hz B Pattern TEST TTL ECL C Set BRIGHTNESS...

Page 27: ...s whether the extra speaker makes the sound 1 4 10 EARPHONE FUNCTION TEST Under PC MODE input PC AUDIO signal determines whether the action of INT SPEAKER output is right Meets earphone with the EARPHONE Determined whether the action of EARPHONE output is normal 1 4 11 TV RECEIVING TEST A Examines sound by ear whether the sound does have mechanical resonation and the electrical unusual sound and i...

Page 28: ...e Green Component signal cable Red Blue Audio cable Left White Right Red sound track D SCART1 21Pin SCART signal cable Black E SCART2 21Pin SCART signal cable Black 1 4 13 VIDEO AUDIO OUTPUT TEST A SCART AV output A 27 LCD TV in AV pattern inputs the CVBS signal the output meets SCART SCART connects another 27 LCD TV which is in SCART pattern Examines two 27 LCD TV whether demonstrates the same im...

Page 29: ...roperly PHASED SIZED and CENTERED Aspect Ratio Resolution to which the native signal is SCALED and CENTERED 1 1 Centered 1 1 Pixel Correlation No Scaling No Filtering Image must be properly ViewSonic Corporation Confidential Do Not Copy N2750w 2G 26 ...

Page 30: ...ode Compatibility Table N2750W 2G MODE 1 1 FS FAR 576i N A 1366 768 1024 768 576p N A 1366 768 1024 768 HD 720p 1250 700 1366 768 N A HD 1080i N A 1366 768 N A 640 480 60Hz N A 1366 768 1024 768 640 480 75Hz N A 1366 768 1024 768 800 480 60Hz 800 600 1366 768 1024 768 800 600 75Hz 800 600 1366 768 1024 768 1024 768 60Hz 1024 768 1366 768 N A 1024 768 75Hz 1024 768 1366 768 N A 1280 720 60Hz 1280 7...

Page 31: ...o the DDC key in 2 1 Equipment Needed N2750W 2G LCD TV DDC Card PC RS 232 cable Barcode Reader VGA Cable N2750W 2G LCD TV DDC Card PC RS 232 Cable 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 ViewSonic Corporation Confidential Do Not Copy N2750w 2G 28 ...

Page 32: ...port 2 2 4 Connect Power Cord to N2750W 2G LCD TV 2 3 DDC Key In Procedure 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 Confidential Do Not Copy N2750w 2G 29 ...

Page 33: ...2 3 4 Press F8 to choose corresponding model DAT N2750W 2G A DAT press ENTER key 2 3 5 Press F9 enter the download interface ViewSonic Corporation Confidential Do Not Copy N2750w 2G 30 ...

Page 34: ...ber 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 Confidential Do Not Copy N2750w 2G 31 ...

Page 35: ...nic EDID Editor Connect the N2750W 2G 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 Confidential Do Not Copy N2750w 2G 32 ...

Page 36: ...in to pin Firmware Upgrade Program One additional LCD TV for checking the program execution 3 2 Setup Procedure 3 2 1 Connect P2 of Fixture with COM port of PC by RS 232 Cable 3 2 2 Connect P1 of Fixture with N2750W 2G LCD TV by VGA Cable 3 2 3 Connect Power Cord to N2750W 2G LCD TV 3 2 4 Connect PC to the additional LCD TV 3 3 ISP Download program procedure 3 3 1 HARDWARE CONNECT STATUS Com Port ...

Page 37: ...3 3 2 DOWNLOAD ISP PROGRAM Step 1 Execute ISP exe ViewSonic Corporation Confidential Do Not Copy N2750w 2G 34 ...

Page 38: ... the MCU It need to be selected W79E632 for this project then press the OK Button Step 3 Load file Press the Select File 0 and Select File 1 button to select the file File 0 and File 1 will be downloaded Hex ViewSonic Corporation Confidential Do Not Copy N2750w 2G 35 ...

Page 39: ...ViewSonic Corporation Confidential Do Not Copy N2750w 2G 36 ...

Page 40: ...onNect button to test whether the communication is well Step 5 Run Pressing the Program All to start download program Pressing the 確定 Button to finish the download program procedure ViewSonic Corporation Confidential Do Not Copy N2750w 2G 37 ...

Page 41: ...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 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 ViewSonic Corporation Confidential Do...

Page 42: ... Figure 2 1 3 Put the cushions on the LCD TV and then 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 Figure 4 Figure 3 Figure 1 Figure 2 1 Power Cord 2 VGA Cable 3 M F Cable 4 RCA Cable 5 User s Guide 6 Remote contrl 7 Guarant Card 8 Battery ViewSonic Corporation Confidential Do Not Copy N2750w 2G 39 ...

Page 43: ...98500P JC278 EPS DOWN 1 6 P 00008064 2013228807P POLYETHY BAG 1 7 DC 00008111 2001131610P OWNER GUIDE 1 8 DC 00008112 2002310592P GUARANT CARD QSG 1 9 A 00006132 2427130097P AC POWER CORD 1 10 CB 00003425 2427701893P RCA CABLE 1 11 CB 00008036 2427751802P M F CABLE 1 12 A VC 0101 0386 2427501187P VGA CABLE 1 13 P 00004497 2011100017P CARTON BOX 1 14 P 00008113 2011127035P CARTON BOX 1 15 N A 20556...

Page 44: ...e 1 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 Stand Dust Cover Dust Cover ViewSonic Corporation Confidential Do Not Copy N2750w 2G 41 ...

Page 45: ... screws to remove Rear Cover 3 Disassembly of Main Board Power Board IR Board Speaker Front Cover and Panel Unit 3 1 Unscrew 14 screws to remove Shield Plate and dust cover Rear Cover ViewSonic Corporation Confidential Do Not Copy N2750w 2G 42 ...

Page 46: ...3 2 Unscrew 4 screws to remove Speaker 3 3 Unscrew 10 screws to remove Bracket Fix Shield Plate Speaker ViewSonic Corporation Confidential Do Not Copy N2750w 2G 43 ...

Page 47: ...3 4 Unscrew 15 screws to remove METAL FITTG IO METAL FITTG I O Down ViewSonic Corporation Confidential Do Not Copy N2750w 2G 44 ...

Page 48: ...3 5 Unscrew 5 screws and disconnect the wires to remove Main Board METAL FITTG I O Side Main Board ViewSonic Corporation Confidential Do Not Copy N2750w 2G 45 ...

Page 49: ...3 6 Unscrew 4 screws and disconnect the wires to remove Power Board 3 7 Unscrew 2 screws to remove Front Cover Power Board ViewSonic Corporation Confidential Do Not Copy N2750w 2G 46 ...

Page 50: ... 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 Confidential Do Not Copy N2750w 2G 47 ...

Page 51: ...in 5 6 Is 12v START Check I301 is working Check p711 pin 5 is 5v Replace IR board Check wireharness P703 Replace X301 I302 I301 Remove P902 Check 12v 5v Replace Power Board NO NO NO NO YES YES YES ViewSonic Corporation Confidential Do Not Copy N2750w 2G 48 ...

Page 52: ...C262 L510 L511 Check I601 pin 38 39 Check C610 C612 L605 L606 Check I601 pin 35 36 Check I601 pin20 21 Check Power 12v Check L609 12v Replace I602 Check P603 Check speaker L607 L608 C607 C608 Check I601 pin 41 42 NO NO SCART1 SCART2 NO NO NO PC NO NO NO Yes Yes Yes TV model SCART AV S VIDEO YPbPr 6 2 NO VOICE ViewSonic Corporation Confidential Do Not Copy N2750w 2G 49 ...

Page 53: ...pin 2 4 L502 Check I203 is working Replace X201 Check I107 has output signal at RP30 RP31 Replace I101 Check P401 pin 4 5 5v Check FFC cable LCD Panel Replace I404 Check I401 LVDS signal out Check I401 pin 34 has signal Check C504 R502 L504 Replace I401 NO NO NO NO NO NO NO NO NO NO Yes Yes Yes Yes Yes Yes Yes Yes Yes TV model SCART SCART1 SCART2 S VIDEO AV YPbPr model 6 3 NO DISPLAY ViewSonic Cor...

Page 54: ... if working Check I301 if RST pin81 have reset pulse Check I301 reset Change I301 Check keypad pcb is ok Check Reset circuit Check if inverter is ok Change Inverter I301 set reset pusle Check I103 crystal 14 318MHZ if working Change I301 Check P401 data bus have signal Check panel power 5v Change LCD panel dark Amber yes Amber Green Green yes n y n y n n n yes y n y y n yes y y ViewSonic Corporati...

Page 55: ... AV SV TUNER I501 SCART1 SCART2 SV PANEL 128Mbit DDR 5W 2 I601 Audio decoder MSP4410G PC AUDIO INPUT RL AV SV AUDIO RL HD AUDIO RL AUDIO AMP I602 TPA3002D2 I2S MCU W79E632A I301 SIF Scart Audio IN R L I205 A V Switch TS5V330DBQR A A V V Scart Video IN SCART1 SCART2 Audio out ViewSonic Corporation Confidential Do Not Copy N2750w 2G 52 ...

Page 56: ...2B 5 6V R132 10 C116 NC Q101 MMBT3904 1 2 3 C109 47nf R131 10 C111 47nf R105 47R D110 MLL5232B 5 6V I101 24LC22 DIP 1 2 3 4 5 6 7 8 NC1 NC2 NC3 GND SDA SCL VCLK VCC C104 NC R106 47R 1 6 11 P102 VGA_DB15P 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 R135 2 2K R104 75R D112 1N4148WS 1 2 L103 0 ohm 0805 D117 5 6V 1 2 R108 47R R133 4 7K P103 SIP4 Debug Port 2 54mm Male 1 2 3 4 I103 24LC21 SMD 1 8 2 7 3 6...

Page 57: ...2 115 116 117 118 119 120 121 122 123 124 127 128 129 187 186 181 180 179 178 177 176 175 174 171 170 169 168 167 166 165 164 161 160 153 134 100 81 133 152 151 150 149 148 147 146 145 144 143 142 141 138 137 136 135 104 130 41 42 43 44 45 46 47 48 77 62 76 52 78 99 98 97 96 95 94 93 92 91 90 89 88 85 84 83 82 106 101 188 189 190 191 192 193 196 197 198 199 49 125 113 173 4 65 80 87 103 108 114 12...

Page 58: ...PLCC MPU 35 21 20 10 14 15 16 17 2 3 4 5 6 7 8 9 43 42 41 40 39 38 37 36 24 25 26 27 28 29 30 31 19 18 32 33 13 11 1 12 23 34 22 44 EA VP X1 X2 RESET INT0 P3 2 INT1 P3 3 T0 P3 4 T1 P3 5 P1 0 P1 1 P1 2 P1 3 P1 4 P1 5 P1 6 P1 7 P0 0 P0 1 P0 2 P0 3 P0 4 P0 5 P0 6 P0 7 P2 0 P2 1 P2 2 P2 3 P2 4 P2 5 P2 6 P2 7 RD P3 7 WR P3 6 PSEN ALE P TXD P3 1 RXD P3 0 P4 2 P4 3 ISP P4 0 P4 1 GND VCC R303 1M L304 220 ...

Page 59: ... VDDD7 VDDD9 VDDD11 VDDD13 VDDD2 VDDD4 VDDD6 VDDD8 VDDD10 VDDD12 VDDA0 VDDA1 VDDA1A VDDA2 VDDA2A VDDA3 VDDA3A VDDA4 VDDA4A VXDD VSSD1 VSSD3 VSSD5 VSSD7 VSSD9 VSSD11 VSSD13 VSSD2 VSSD4 VSSD6 VSSD8 VSSD10 VSSD12 VSSA0 VSSA1 VSSA2 VSSA3 VSSA4 AGND AGNDA VXSS XTAL XTALI CE SCL SDA AI11 AI12 AI13 AI14 AI1D AI21 AI22 AI23 AI24 AI2D AI31 AI32 AI33 AI34 AI3D AI41 AI42 AI43 AI44 AI4D XPD0 XPD1 XPD2 XPD3 XP...

Page 60: ...6 57 58 59 60 61 62 63 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 23 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 AVSUP ANA_IN1 ANA_IN ANA_IN2 TESTEN XTAL_IN XTAL_OUT TP AUD_CL_OUT NC NC D_CTR_I OUT1 D_CTR_I OUT0 ADR_SEL STANDBYQ NC I2C_CL I2C_DA I2S_CL I2S_WS I2S_DA_OUT I2S_DA_IN1 ADR_DA ADR_WS ADR_CL DVSUP DVSS I2S_DA_IN2 NC NC NC RESETQ DACA_R DACA...

Page 61: ... 0 01U 0805 R643 10K C695 10nf L620 80 0805 C677 0 1 1206 C657 1U C668 0 01U 0805 C655 1U C670 0 1U I602 TPA3002D2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 24 22 23 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 SDZ R_INN R_INP V2P5 L_INP L_INN AVDDref Vref VARDIFF VARMAX VOL REFGND BSLN PVCCL PVCCL L_OUTN L_OUTN PGNDL PGNDL L_OUTP L_OUTP BSLP PVCCL PVCCL VCLA...

Page 62: ...0U C456 0 1U C461 0 1U P401 CONN DUAL 15 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 C459 1000P E B C SOT 23 Q401 MMBT3904 1 3 2 C458 470U C462 0 1U L411 NC R436 0R R435 NC R426 100K L412 80 OHM 6A 0805 R425 1K R423 NC R422 4K7 R424 10K L413 NC RXE3 3 RXE0 3 RXE2 3 RXE1 3 RXE2 3 RX...

Page 63: ...0 ohm R622 8 2k R623 10k C643 47uF 16V R620 0 C645 47uF 16V L604 220 ohm R608 2 2K R610 10K R613 10k R612 2 2K L605 220 ohm R617 10k R611 NC R616 2 2K C636 NC L606 220 ohm R609 0 C635 100p C633 47uF 16V P601 RCA JACK 1 2 3 4 5 6 7 8 9 C601 100p C641 100p C640 1n C634 100p C639 47uF 16V C637 100p C638 100p C632 100p C642 100p L601 220 ohm R607 10K R601 2 2K R615 1k P602 AUDIO_JACK 1 4 5 2 3 R614 0 ...

Page 64: ...00U 16V C905 100U 16V R911 10K C930 NC R907 4K7 OUT ADJ IN I902 AP1084N 3 3 3 3V Regulator TO 263 3 2 1 4 E B C SOT 23 Q903 MMBT3904 1 3 2 R910 4K7 C912 0 1U C906 0 1U R902 10K C907 100U 16V C367 0 1U L155 R201 0805 C365 100U 16V R903 1K L903 BEAD 3 5x9x0 8 C903 1000uF 16V LowESR P902 CON_ 2 5mm_12 1 2 3 4 5 6 7 8 9 10 11 12 C922 0 1U R913 0 C913 1000uf 16V LOWESR L907 40UH C915 0 1U C902 0 1U R91...

Page 65: ...75 Q501 MMBT3904 1 2 3 R559 3 3K L507 40uH C550 100U 16V R560 3 3K R510 33 C552 22U 16V R563 NC R549 1K L514 220 R562 0 R548 1K C551 0 1U C557 0 1U C549 1000P R553 0 R504 100 C548 1000P C540 47P R530 1K C513 0 1U D523 10p R526 10K C541 47P D525 10p D508 10p R515 3K D524 10p L503 220 ohm D507 10p R564 75 R544 2 2K R513 47 P501 S_TERMINAL 8 1 6 2 5 3 R545 10K C538 100p P505 SIP4 2 54mm Male 1 2 3 4 ...

Page 66: ...Q 2 5V_DMQ GND GND 2 5V_DMQ GND GND GND GND 2 5V_DMQ L402 220 ohm 0805 C404 0 1U 7 5 3 1 8 6 4 2 RP41 RP75x4 7 5 3 1 8 6 4 2 RP42 RP75x4 7 5 3 1 8 6 4 2 RP43 RP75x4 L403 220 ohm 0805 7 5 3 1 8 6 4 2 RP44 RP75x4 7 5 3 1 8 6 4 2 RP45 RP75x4 C464 0 1U 7 5 3 1 8 6 4 2 RP47 RP75x4 R408 150 ohm 5 R404 100 ohm R0603 7 5 3 1 8 6 4 2 RP49 RP75x4 R402 1K ohm C468 0 1U 7 5 3 1 8 6 4 2 RP48 RP75x4 R406 100 oh...

Page 67: ..._IN KEY1_OK KEY2_UP KEY5_DEC KEY0_MENU KEY3_DOWN KEY4_INC LED_R PWRON GND GND GND GND I711 CAM 1538TP5 1 2 3 VOUT GND VCC P711 CON6_2mm 1 2 3 4 5 6 P701 CON7_2mm 1 2 3 4 5 6 7 D711 S701 S707 S706 S704 S703 S702 S705 ViewSonic Corporation Confidential Do Not Copy N2750w 2G 64 ...

Page 68: ...9 1 MAIN PCB TOP VIEW ViewSonic Corporation Confidential Do Not Copy N2750w 2G 65 9 PCB Layout Diagrams ...

Page 69: ...9 2 MAIN PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy N2750w 2G 66 ...

Page 70: ...9 3 CON PCB TOP VIEW ViewSonic Corporation Confidential Do Not Copy N2750w 2G 67 ...

Page 71: ...9 4 CON PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy N2750w 2G 68 ...

Page 72: ...9 5 IR PCB TOP VIEW ViewSonic Corporation Confidential Do Not Copy N2750w 2G 69 ...

Page 73: ...9 6 IR PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy N2750w 2G 70 ...

Page 74: ...10 Exploded View And Exploded Parts List ViewSonic Corporation Confidential Do Not Copy N2750w 2G 71 ...

Page 75: ...ViewSonic Corporation Confidential Do Not Copy N2750w 2G 72 ...

Page 76: ...1675800P SHIELD PLATE JC278XXXXUA SECC T 0 8MM SHIELD COVER 1 24 N A 2082340082P SCREW CSK SCREW CSK M4x8 11 25 N A 2071879400P BRACKET FIX JC278XXXXUA SECC T 1 6MM SUPPORT 1 26 N A 2082340082P SCREW CSK SCREW CSK M4x8 2 27 N A 2071879500P BRACKET FIX JC278XXXXUA SECC T 0 8MM SUPPORT SPK 1 28 M SCW 0824 0811 2080003700P SCREW SPE ISZZTER001A M3 6L MSWR17 FZMYI 2 29 M SCW 0824 0285 2084730082P SCRE...

Page 77: ...100017P 6P85 16 Foam EPE UP Left P 00005510 2012177501P 6P20 17 Foam EPE UP Right P 00005511 2012177601P 6P21 18 Craft Box P 00008113 2011127035P 6P01 19 Foam EPE Down P 00008114 2012180002P 6P22 20 PolyBag HDPE P 00008115 2013054003P 6P60 21 Generic Foam Set P 00002919 30291 22 Generic Box P 00002920 21901 23 Plastics All Covers Dust Cable Hinge covers Pedestal Stand PL 00003417 2028258801P 5B04 ...

Page 78: ...25 C CS 0603 X7R 50V 0 1u K T C224 1 39 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C225 1 40 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C226 1 41 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C227 1 42 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C228 1 43 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C229 1 44 N A N A 23...

Page 79: ... 50V 0 1u K T C444 1 120 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C445 1 121 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C446 1 122 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C448 1 123 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C449 1 124 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C450 1 125 N A N A 2346110496P ...

Page 80: ...0V 0 01u K T C678 1 204 N A N A 2346110496P CAP CHIP 125 C CS 0603 X7R 50V 0 1u K T C684 1 205 N A N A 2341139196P CAP CHIP 125 C CS 0603 COG 50V 390p J T C689 1 206 N A N A 2341168196P CAP CHIP 125 C CS 0603 COG 50V 680p J T C690 1 207 N A N A 2341147196P CAP CHIP 125 C CS 0603 COG 50V 470p J T C692 1 208 N A N A 2346133296P CAP CHIP 125 C CS 0603 X7R 50V 3300p K T C698 1 209 N A N A 2346133296P ...

Page 81: ...m 200MHZ 0805 200mA L204 1 289 N A N A 2379822106P BEAD HI IMPEDANCE Z 220 ohm 200MHZ 0805 200mA L206 1 290 N A N A 2253300096P RES CHIP 1 8W RC 0805 1 8 W 0 ohm J T L207 1 291 N A N A 2253322196P RES CHIP 1 8W RC 0805 1 8 W 220 ohm J T L301 1 292 N A N A 2379822106P BEAD HI IMPEDANCE Z 220 ohm 200MHZ 0805 200mA L302 1 293 N A N A 2379822106P BEAD HI IMPEDANCE Z 220 ohm 200MHZ 0805 200mA L303 1 29...

Page 82: ...1 10W RC 0603 1 10W 120 ohm J T R655 1 372 N A N A 2251268106P RES CHIP 1 10 RC 0603 1 10W 680 ohm F T R656 1 373 N A N A 2253210496P RES CHIP 1 10W RC 0603 1 10W 100Kohm J T R908 1 374 N A N A 2202524202P PCB MULTILAYER 278FE65E MB FR4 4 240 217 3 02 U101 1 375 N A N A 2336310613P CAP MINI ELE 105 C EC 10u 16V 4 7 P 2 5 T C202 1 376 N A N A 2336310613P CAP MINI ELE 105 C EC 10u 16V 4 7 P 2 5 T C2...

Page 83: ...NNECTOR JST XH 12P SIDE P 2 5 OR EQUAL P902 1 455 N A N A 2369105701P XTAL OSC 24 0000MHZ 49US 0 1mw 16PF X301 1 456 N A N A 2369105501P XTAL OSC 18 432MHZ 49US 0 1mW 12pf X601 1 457 N A N A 2404301106P CONNECTOR JST PH 7P SIDE P 2 0 OR EQUAL P701 1 458 N A N A 2202129800P PC BOARD JC278 KEY B CEM1 120 20 V1 00 U701 1 459 N A N A 2363703800P LED 3 GRN YEL D721 1 460 N A N A 2419301400P RECEIV BLOC...

Page 84: ...G 50V 100p J T C275 1 541 N A Inactive 2341110196P CAP CHIP 125 C CS 0603 COG 50V 100p J T C276 1 542 N A Inactive 2341110196P CAP CHIP 125 C CS 0603 COG 50V 100p J T C277 1 543 N A Inactive 2341110196P CAP CHIP 125 C CS 0603 COG 50V 100p J T C278 1 544 N A Inactive 2341110196P CAP CHIP 125 C CS 0603 COG 50V 100p J T C309 1 545 N A Inactive 2346110396P CAP CHIP 125 C CS 0603 X7R 50V 0 01u K T C520...

Page 85: ...622 N A Inactive 2360300396P XISTOR NPN R SMD MMBT3904 SOT 23 MOTOROLA Q604 RA 1 623 N A Inactive 2360300596P XISTOR NPN R SMD MMBT3904 7 SOT23 VISHAY Q604 RB 1 624 N A Inactive 2360300296P XISTOR NPN R SMD HMBT3904 SOT23 HI SIN Q604 RF 1 625 N A Inactive 2360300396P XISTOR NPN R SMD MMBT3904 SOT 23 MOTOROLA Q605 RA 1 626 N A Inactive 2360300596P XISTOR NPN R SMD MMBT3904 7 SOT23 VISHAY Q605 RB 1 ...

Page 86: ...RC 0603 1 10W 10Kohm J T R316 1 707 N A Inactive 2253247196P RES CHIP 1 10W RC 0603 1 10W 470 ohm J T R317 1 708 N A Inactive 2253210196P RES CHIP 1 10W RC 0603 1 10W 100 ohm J T R319 1 709 N A Inactive 2253210196P RES CHIP 1 10W RC 0603 1 10W 100 ohm J T R320 1 710 N A Inactive 2253210396P RES CHIP 1 10W RC 0603 1 10W 10Kohm J T R325 1 711 N A Inactive 2253210196P RES CHIP 1 10W RC 0603 1 10W 100...

Page 87: ...1 N A Inactive 2369103901P XTAL OSC 24 576MHZ 49US 0 1mW 20pF X201 1 792 N A Inactive 2369102901P XTAL OSC 14 31818MHZ 49US 0 1mW 30PF X401 1 793 N A Inactive 2433303010P SHIELDING FOAM W10 H10 5 L10mm K904 1 794 N A Inactive 2433303010P SHIELDING FOAM W10 H10 5 L10mm K905 1 795 N A Inactive 2056606025P SERIAL LABEL VS CN WARRANTY CARD SN STICKER 6P08 2 796 N A Inactive 2055613379P LABEL VIEWSONIC...

Page 88: ...247296P RES CHIP 1 10W RC 0603 1 10W 4 7Kohm J T R637 1 876 E R 0405 6419 Active 2253247296P RES CHIP 1 10W RC 0603 1 10W 4 7Kohm J T R901 1 877 E R 0405 6419 Active 2253247296P RES CHIP 1 10W RC 0603 1 10W 4 7Kohm J T R907 1 878 E R 0405 6419 Active 2253247296P RES CHIP 1 10W RC 0603 1 10W 4 7Kohm J T R910 1 879 E R 0405 6410 Active 2253210296P RES CHIP 1 10W RC 0603 1 10W 1 0Kohm J T R138 1 880 ...

Page 89: ...ive 2360301896P XISTOR NPN R SMD MMBT3904LT1 SOT23 LRC Q502 RC 1 959 E Q 0402 1087 Active 2360301896P XISTOR NPN R SMD MMBT3904LT1 SOT23 LRC Q601 RC 1 960 E Q 0402 1087 Active 2360301896P XISTOR NPN R SMD MMBT3904LT1 SOT23 LRC Q604 RC 1 961 E Q 0402 1087 Active 2360301896P XISTOR NPN R SMD MMBT3904LT1 SOT23 LRC Q605 RC 1 962 E Q 0402 1087 Active 2360301896P XISTOR NPN R SMD MMBT3904LT1 SOT23 LRC Q...

Page 90: ...4 E 00000999 Active 2336347613P CAP MINI ELE 105 C EC 47u 16V 5 7 P 2 5 T C204 1 1025 E 00000999 Active 2336347613P CAP MINI ELE 105 C EC 47u 16V 5 7 P 2 5 T C210 1 1026 E 00000999 Active 2336347613P CAP MINI ELE 105 C EC 47u 16V 5 7 P 2 5 T C221 1 1027 E 00000999 Active 2336347613P CAP MINI ELE 105 C EC 47u 16V 5 7 P 2 5 T C231 1 1028 E 00000999 Active 2336347613P CAP MINI ELE 105 C EC 47u 16V 5 ...

Page 91: ... Flow Chart 7 Block Diagram 8 Schematic Diagrams 9 PCB Layout Diagrams 10 Exploded Diagram And Exploded Parts List 11 Recommended Spare Parts List B Are you satisfied with this Service Manual Item Excellent Good Fair Bad 1 Service Manual Content 2 Service Manual Layout 3 The form and listing C Do you have any other opinions or suggestions regarding this service manual Reader s basic dada Name Titl...

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