Service Manual ViewSonic N3250w-G-1 Model No. VS10769-1G 32” LCD TV Display (N3250w-G_SM Rev. 1a Jan.
Copyright Copyright ¤ 2006 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. Service Tool & Equipment Required 4 3. Specification 4 4. Adjustment Procedure 8 5. Packing For Shipping And Disassembly Procedure 27 6. Troubleshooting Flow Chart 35 7. Exploded View 39 8. Recommended Spare Parts List 41 9. Block Diagram 48 10. Schematic Diagrams 49 11. Working Theorem 60 12. Wiring Diagram 62 13.
1. Precautions and Safety Notices 1.1. SAFETY PRECAUTIONS This LCD TV is manufactured and tested on a ground principle that a user's safety comes first. However, improper use or installation may cause damage to the LCD TV as well as to the user. Carefully go over the following WARNINGS before installing and keep this guide handy. WARNINGS: This LCD TV should be operated only at the correct power sources indicated on the label on the rear end of the LCD TV.
LCD TV Handling Precautions 1. Handling Precautions (1) Since front polarizer is easily damaged, pay attention not to scratch it. (2) Be sure to turn off power supply when inserting or disconnecting 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.
Take out the LCD TV with cushions Taking out the LCD TV by grasping the LCD panel. That may cause “Mura” Place the LCD TV on a clean and soft foam pad. Placing the LCD TV on foreign objects.
2. Service Tool & Equipment Required 1. 2. 3. 4. 5. 6. 7. 8. 9. SIGNAL GEN. MULTIMETER OSCILLOSCOPE SCREW DRIVER IRON ABSORBER SOLDER DUMMY LOAD (5A/200W) DVD PLAYER 3. SPECIFICATIONS 3.1. PRODUCT SPECIFICATIONS LCD Panel 32" TFT Power Management (OFF MODE) < 5W Displayable Resolution VESA 1280×1024 max. Pixel Dimension 0.51075(H)×0.5107 (W)mm LCD Display Color 16.7M Color Max.
3.2. FACTORY SUPPORTING MODES ITEM 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 15.840ms 12.
ITEM 9 10 11 12 1360×768 60HZ 1280×1024 60HZ TIMING 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. 3.3.
Connector pin assignments for DVI cable DVI: 25 pins DVI connector is designed to match with DVI digital signal cable, the pin assignment is as the following: * 25 pins DVI female Pin 1 2 3 4 5 6 7 8 Signal Assignment Pin TMDS RX29 TMDS RX2+ 10 TMDS Ground 11 Floating 12 Floating 13 DDC Clock 14 DDC Data 15 Floating 16 Signal Assignment Pin TMDS RX117 TMDS RX1+ 18 TMDS Ground 19 Floating 20 Floating 21 +5V Power 22 Ground 23 Hot Plug Detect 24 Signal Assignment TMDS RX0TMDS RX0+ TMDS Ground Floating Fl
4. Adjustment Procedure 4.1. ADJUSTMENT C ONDITIONS AND PRECAUTIONS 1. Approximately 30 minutes should be allowed for warm up before proceeding. 2. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. 3. ESD protection is needed before adjustment. 4.2. MAIN ADJUSTMENTS NO. FUNCTION DESIGNATION 1. 2. EEPROM Initial White Balance Function Key Function Key 4.3. ALIGNMENT PROCEDURES Adjustment Conditions and Precautions: (A).
4-4 Adjusting Procedure 1. Function Test 1.1. Product - 32” LCD TV 1.2. Test Equipment -PC signal generator: CHROMA 2130,2135,2325,2326 or 2525. -TV, Video signal generator: SHIBASOKU TG91CC. -AV, S-Video, HD, and SCART signal generator: DVD. -Color analyzer: MINOLTA CA110. -Power meter: CP-310A or CP-320A. 1.3.
Fig. 3 1. 2. Fig. 4 Fig. 3: under the picture of 16 grey scale, select WHITE BALANCE and press ENTER, The color warm will auto adjust, the same as Fig. 4. The act of EHITE BALANCEL is completed when EHITE BALANCEL disappeared. After adjusting, switch to FULL WHITE and check the value of each color. Preset color for N3250W(G) USER----9300 x=0.285±0.015 y=0.293±0.015 Warm SRGB----6500 x=0.313±0.015 y=0.329±0.015 COOL----12000 x=0.271±0.015 y=0.278±0.015 HD MODE: A. Timing: PAL OR NTSC. B.
1.4.5 OSD FUNCTION TEST: A. Timing: 640*480 @75Hz. B. Pattern: “GENERAL-1”. C. Make sure that Each FUNCTION have one right action. D. After adjusting and confirming no error, we can take delivery of goods until it set as default. 1.4.6 Under PC MODE, input PC AUDIO signal, determines whether the action of AUDIO IN is right. Meets earphone with the EARPHONE, Determined whether the action of AUDIO OUT is normal. SET CONTENT CHANNEL FREQUENCE Broadcasting (MHz) System ORDER PATTERN SOUND 45.
1.4.8.VIDEO RECEIVING TEST: AV receives supply oscillator: AV/S-Video/HD/SCART1/SCART2/SCART-SV are from DVD to LCD TV; Examines whether has the image and the sound and is normal. (1). AV: Video cable (Yellow), Audio cable (Left (White), Right (Red) sound track). (2). S-Video: S-Video signal cable (White), Audio cable (Left (White), Right (Red) sound track). (3). HD (Ypbpr/YcbCr): brightness signal cable (Green), Component signal cable (Red, Blue), Audio cable (Left (White), Right (Red) sound track). (4).
1:1 FS FAR MODE N/A 1366*768 1024*768* 576i** N/A 1366*768 1024*768* 576p** 1250*700 1366*768 N/A HD 720p N/A 1366*768 N/A HD 1080i N/A 1366*768 1024*768* 640*480@60Hz N/A 1366*768 1024*768* 640*480@75Hz 800*600 1366*768 1024*768* 800*480@60Hz 800*600 1366*768 1024*768* 800*600@75Hz 1024*768* 1366*768 N/A 1024*768@60Hz 1024*768* 1366*768 N/A 1024*768@75Hz 1280*720* 1366*768 N/A 1280*720@60Hz 1280*768* 1366*768 N/A 1280*768@60Hz 1360*768* N/A N/A 1360*768@60Hz N/A 1366*768* N/A 1280*1024@60Hz Chart 4.
2. 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. 2.1.
2.2. Setup Procedure 2.2.1 Connect P2 of Fixture with printer port of PC by LPT Cable. 2.2.2 Connect P1 of Fixture with N3250W(G) LCD TV by VGA Cable. 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.
Step 2: Select MCU type Pressing the Comb box to select the type of the MCU, It need to be selected the 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. (*.
Confidential - Do Not Copy ViewSonic Corporation 17 N3250w-G
Step 4: Test Communication Pressing the ConNect button to test whether the communication is well.
Step 5: Run Pressing the Program All to start download program. Pressing the ‘OK’ Button to finish the download program procedure. Trouble shooting: If you find the status like the follow picture. Please check the following item. a. The connecting status between PC and ISP board. b. 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.
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.
3. 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. 3.1.
3.2. Setup Procedure 3.2.1 Connect VGA Card and DDC Card with RS-232 cable. 3.2.2 Barcode Reader connect with keyboard and PC keyboard port. 3.2.3 Connect RS-232 Cable and N3250W(G) LCD TV with VGA Cable. (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.
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.
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.
3.3.7 The successful picture is as follows. “Compare EDID:OK! Press any key to continue”. 3.4.
Connect the N3250W(G) LCD TV to PC with VGA Cable. Excute the EDID Editor, then Press Ctrl+F5.
5. 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. (Figure 3) 1.4 Place the LCD TV into the carton and then Put the other cushions on the LCD TV,put all the accessories into the carton. At last, close the carton and seal it with tape. (Figure 4) 1.Power Cord 4.RCA Cable 2.VGA Cable 5.
Disassembly Procedure 1. 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.
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.
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.
3.3. Unscrew 3 screws to remove Metal Fittg. 3.4. Unscrew 10 screws to remove Metal Fittg.
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.
Keypad Board 3.8. Unscrew 8 screws to remove Speaker. Speaker 3.9. Unscrew 6 screws to remove Bracket.
3.10. Unscrew 6 screws to remove Front Cover. Front Cover 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.
6. Troubleshooting Flow Chart 11.1.
N3250w-G Check I118 pin 14 NO Replace I118 Check I127 pin 44,45 SCART1 Check I110 pin 9,11,12,14 C278,C279,L155,L153 NO AV, S-VIDEO Check I127 pin 38,39 SCART2 YPbPr NO Check R500,R501 L138,L139,C602,C603 Check I127 pin 35,36 NO Check R498,R499 C600,C601,L136,L137 Check I110 pin 9,10,12,13 C281,C282,L159,L160 Confidential - Do Not Copy SCART TV model PC NO Check I127 pin 41,42 NO L 171,L173,R502 R503,C604,C605 Replace I127 36 Check I127 pin20,21 Yes Check L126 12v? NO Check Po
N3250w-G Yes NO Replace I118 Check I107 pin 27 has signal NO Check I109 pin 2,6 has signal? Check I107 is working? Check I107 pin 26,34 has signal? NO SCART2 Yes S-VIDEO NO Replace X101 Check C262,C263,R215,R217,L 130,L131 Check I107 pin 27 Yes NO Check I109 pin 2,4 L135 Yes YPbPr model Check I103 pin 34 has signal? NO Check C418,R339 L134 NO Yes 37 Replace I101 Check I103 LVDS signal out Yes Check P116 pin 4,5+5v? NO Check I110 pin3,4 C280 Yes Check I107 has output signal at
DVI D SUB YPbPr Amber dark Check power region Check led color yes Check I/O cable is ok Check I/O signal is in pwr saying mode? Amber&Green Green Check X103 crystal 24MHZ if working? y Press Power Key on/ off is ok? Refer to No Power trouble shoot flow chart n y Check I113 reset Change I113 yes n n Press menu Key if osd display Check Reset circuit Check keypad pcb is ok? y yes n Check if inverter is ok Change Inverter n Check I103 if RST pin81 have reset pulse n I113 set reset pusle?
7.
EXPLODED PARTS LIST (N3250w-1G) ViewSonic Model Number: VS10769-1G Rev: 1a Serial No.
8. Recommended Spare Parts List RECOMMENDED SPARE PARTS LIST (N3250w-1M) ViewSonic Model Number: VS10769-1M Rev: 1b Serial No. Prefix: PS4 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Accessories: Board Assembly: Cabinets: Cables: Documentation: Electronic Components: Hardware: Packing Material: Description POWER CORD USA WALL 1.
ViewSonic Model Number: VS10769-1G Rev: 1a Serial No.
Item ViewSonic P/N Ref. P/N Description 73 74 #N/A #N/A 2346147396P 2341112096P CAP,CHIP 125'C CAP,CHIP 125'C 75 #N/A 2336310713P CAP,MINI ELE 105'C EC 100u/ 16V 6.3*7 P=2.5 T 76 77 #N/A #N/A 2346110496P 2341130096P CAP,CHIP 125'C CAP,CHIP 125'C 78 #N/A 2336610613P CAP,MINI ELE 105'C EC 10u/ 50V 5*7 P=2.5 T 79 #N/A 2336322613P CAP,MINI ELE 105'C EC 22u/ 16V 4*7 P=2.
Item ViewSonic P/N Ref. P/N Description 107 E-D-0403-1666 2364500396P DIODE,ZENER SMDRLZ5.6B 5.45-5.
Item ViewSonic P/N Ref. P/N Description 157 158 #N/A #N/A 2379330006P 2379322106P BEAD,HI-IMPEDANCE Z= 30 ohm(200MHZ~) 0603 300mA BEAD,HI-IMPEDANCE Z= 220 ohm(200MHZ~) 0603 200mA 159 #N/A 2379360106P BEAD,HI-IMPEDANCE Z= 600 ohm(200MHZ~) 0603 200mA 160 161 162 163 E-00003533 #N/A #N/A #N/A 2379520196P 2371115001P 2379500196P 2371120201P BEAD,HI-CURRENTZ= 200 ohm 0805 I=2.0A COIL,CHOKE 15uH/ 8*10 UEW 0.5mm/21.5Ts BEAD,HI-CURRENTZ= 80 ohm 0805 I=6.0A COIL,CHOKE 2mH 10*15 0.3mm/231.5Ts P=5.
Item ViewSonic P/N Ref.
Item ViewSonic P/N Ref. P/N Description 209 E-R-0405-6409 2253210196P RES CHIP 1/10W RC 0603 1/10W 100 ohm J T 210 E-R-0405-6998 2253210096P RES CHIP 1/10W RC 0603 1/10W 10 ohm J T 211 E-R-0405-6417 2253247096P RES CHIP 1/10W RC 0603 1/10W 47 ohm J T 212 E-R-0405-6410 2253210296P RES CHIP 1/10W RC 0603 1/10W 1.
9. Block Diagram AC 110~220V INPUT +24V SWITCHING POWER SUPPLY DC +24V for INVERTER +12V 12V for I129 TPA3004D2 Audio AMP 5VD for I113 W79E632A1 MCU and I114 24C16 EEPROM ,I115 24C04 HDCP EEPROM I137(SOT252) LM7808-8.0V I100 24C21 DVI EEPROM and I101 24 C21 D_SUB EEPROM AV_8V for I127 MSP 34XX G Audio processor use I127 MSP 34XXG Audio processor and I135 AP9435M PANEL VCC use 5VD SWITCH( I136 AP9435M,Q105 MM3904 ) 1.8V for I103 MST5151LA SCALER I140(TO263) AP1084K33 3.
10. Schematic Diagrams 10.1. D-SUB / DVI GVCC GVCC 01 D_SUB/DVI R100 R101 3.3K 3.3K GVCC1 GVCC1 R102 4.
10.2. SCALER MST5151LA 追加1 for BUSTYPE H- 8 bit parallel bus L- 4 bit ddr direct bus If use LT1084-3.3 then: 240 open & 390 = 0 02 SCALER R201/0805 +AVDD_PLL2 +VDDP +AVDD_ADC +VDD_MPLL RX2+ RX2- X100 14.
10.3. DDR NT5DS4M32E 2_5VM 2_5VM 03 DDR P2,11 2_5VM 2_5V_DMQ 2_5VM 2_5V_DMC L115 L116 R201/0805 + + C178 10U/50V C179 22U/16V C180 0.1U C181 0.1U C182 0.1U C183 0.1U C184 0.1U C185 0.1U C186 0.1U C187 0.1U C188 0.1U C189 0.1U R201/0805 C190 0.1U + C191 22U/16V C192 0.1U C193 0.1U C194 0.1U C195 0.1U C196 0.
10.4. VIDEO DECODER SAA7117 STB_5V STB_5V 04 SAA7117A +3-3V_S +1-8V Video Decoder SAA7117 +3-3V_S +3-3V_VB +1-8V_VA L120 R201/0805 I108 P2 IN VVCLK1 VDXA0 VDXA1 VDXA2 VDXA3 VDXA4 VDXA5 VDXA6 VDXA7 VVCLK1 VDXA[0..7] C231 0.1U + C229 10U/50V 4 2 OUT + C225 47U/16V 3 C226 0.1U + C227 0.1U L118 R201/0805 C204 10U/50V L121 R201/0805 1 ADJ AIC117-1.8V/SOT223 C234 C232 + 0.1U C212 0.1U4 C214 C215 C216 C217 C218 C219 C220 + C211 47U/16V 0.1U 0.1U 0.1U 0.1U 0.1U 0.
10.5. MCU W79E632 5VD 05 MCU P4,7,8 P4,7,8 5VD 5VD RP20 7 5 3 1 1 P 1.1 Power EN ON : L , OFF : H 7 5 3 1 RP21 2 P 1.3 Mute Audio on : H , Audio off : L 3 P 2.3 Mute AMP Audio on : H , Audio off : L RP 4.7KX4 4.7K RP 4.7KX4 8 6 4 2 8 6 4 2 C376 0.1U 4 P 2.4 SCART2 : H , SCRAT1 : L 5VD 5 P 2.5 RCA_AV : H , SCRAT_AV : L X103 24MHz C379 UCLK C378 20P 21 X1 20 X2 10 RESET P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 43 42 41 40 39 38 37 36 P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.
10.6.
10.7.
10.8. AUDIO AMP TPA3004D2 08 Audio AMP GND_APO 6 L_INN C657 1u/16V 0603 4 V2P5 C658 1u/16V 0603 2 R_INN C659 1u/16V 0603 3 R_INP 11 R532 R533 R534 AVDDref 8 9 10 Vref VARDIFF VARMAX 10u/50V AGND 10n/0805 1 34 AGND VAROUTL MODE AGND L127 R80/0805 L128 NC(110uH) 12VIN C660 C661 100n 10u/50V 100n 10u/50V C663 C664 15uH C662 1uF/63V L123 15uH BSRN PVCCR PVCCR R_OUTN R_OUTN 48 47 46 45 44 C665 1uF/63V P115 CON_2.
10.9. LVDS OUT 09 LVDS OUT R600~R606 CMO R600 NC/0R P5 R602 NC/0R RXE0RXE0- RXE0+ RXE0+ P2 P2 RXE1RXE1- RXE1+ RXE1+ P2 P2 RXE2RXE2- RXE2+ RXE2+ P2 P2 RXECRXEC- RXEC+ RXEC+ P2 P2 RXE3RXE3- RXE3+ RXE3+ RXE3+ RXE3RXEC+ RXEC- PANELVCC R604 NC/4.7K R605 NC/4.7K R606 NC/4.7K CON 2X15 2mm R599 C701 20K 0.
10.10. POWER DC DC 5VD 10 Power DC-DC L182 12VIN R80/0805 C722 0.1U AV_8V R616 1K STB_5V I137 I136 P5 P118 1 2 3 4 5 6 7 8 9 10 11 12 PWRON PWRON R617 47K 3 Q115 MMBT3904 1 R618 NC G S S S D D D D C724 47u/16V 2 12VIN 4 3 2 1 5 6 7 8 OUT C712 C723 0.1U C725 47uf/16V 4 ADJ 0.1U IN C713 100U/16V 3 L183 2 C716 + 1 0.1U LM7808/TO252 AP9435M GNDP C719 + GNDP 1000uF/16V/LowESR GNDP POWER_ON V33 3_3VA ON_PBACK ON_PBACK L185 P5 5VD L188 CON_ 2.
10.11.
11. Working Theorem A. A/D converter (PC & YPbPr) and DVI(HDCP) input The MST5151LA offers designers the flexibility of an analog interface and High-Definition Multimedia Interface (DVI) receiver integrated on a single chip. Also included is support for High bandwidth Digital Content Protection (HDCP). Analog Interface The MST5151LA is a complete 8-bit 165 MSPS monolithic analog interface optimized for capturing Component Video (YPbPr) and RGB graphics signals.
C. Scaling controller The MST5151LA chip is a LCD-TV controller chip for color display up to SXGA or /WXGA wide screen panel. It includes a 128/256/512 4-bit/fixel font 3D interlace-to progressive video processing. It also supports non-linear scaling for 4:3 to/form 16:9 conversion, flexible picture in video display, cinema to TV conversion, hue/saturation adjustment, and advanced OSD system. The MST5151LA chip is targeted for the applications of high-end LCD-TV.
12.
13. PCB Layout Diagrams 13.1.
13.2.
13.3. KEYPAD PCB TOP VIEW 13.4.
13.5.
13.6.
*Readers 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? U nit Ex cellent Fair G ood Bad 1. Precautions and Safety Notices 2. Service Tool & Equipment Required 3. Specification 4. Adjustment Procedure 5.
