ViewSonic VA502mb-1 User Manual Download

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ViewSonic VA502mb-1

Model No. VS11352

15” Color TFT LCD

Display

(VA502mb-1_SM Rev. 1a Dec. 2006)

Service Manual

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Summary of Contents for VA502mb-1

Page 1: ...ViewSonic VA502mb 1 Model No VS11352 15 Color TFT LCD Display VA502mb 1_SM Rev 1a Dec 2006 Service Manual ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583...

Page 2: ...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 t...

Page 3: ...scription 6 4 Circuit Description 8 5 Adjustment Procedure 19 6 Troubleshooting Flow Chart 39 7 Block Diagram 40 8 Schematic Diagrams 41 9 PCB Layout Diagrams 50 10 Exploded Diagram and Exploded Parts...

Page 4: ...vice technician Always unplug the monitor before cleaning it Clean the cabinet with a clean dry cloth Apply nonammonia based cleaner onto the cloth not directly onto the glass screen Keep the monitor...

Page 5: ...zer 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 Place the monitor on...

Page 6: ...Place the monitor on the lap the panel surface must be upwards The panel is placed facedown on the lap That may cause Mura 3 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 7: ...Sync Compatibility Sync on Green No PC Yes Power Mac Yes Compatibility TV Box NextVision 6 no Power Voltage AC 100 240V 50 60Hz Yes On Mode Max Typ Under30 W in max Power Consumption Active Off Mode M...

Page 8: ...QA pass label Yes Hg Warnning label Yes Warranty Sticker NO Warranty Card NO Carton Sticker NO PE bag of Carton NO TFT LCD PANEL 1st Panel Source SVA 150XG04TB Type TN LVDS Active Size 304 128 mm H x...

Page 9: ...3 Front Panel Function Control Description Do the following to adjust the display setting 6 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 10: ...7 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 11: ...control logic brightness control logic DDC and DC convert DC circuit and so on Power Board Include adapter inverter Flat Panel and CCFL backlight Main Board Key Board RS232 Connector For white balanc...

Page 12: ...he backlight It mostly consists of starting circuit PWM controller DC changing circuit LC surging circuit output circuit and protection circuit etc AC input EMI filter Bridge Rectifier and Filter Star...

Page 13: ...10 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 14: ...11 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 15: ...ditional 4 bit port P4 three 16 bit timer counters a serial port These peripherals are supported by a eight sources two level interrupt capability To facilitate programming and verification the ROM in...

Page 16: ...PIN Descriptions 13 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 17: ...gram are as follows 14 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 P3 0 P3 7 P1 0 P1 7 ALU Port 0 Latch Port 1 Latch Timer 1 Timer 0 Timer 2 Port 1 UART XTAL1 PSEN ALE Vss VCC RST XTAL2 O...

Page 18: ...Block Diagram PIN Function 15 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 19: ...plication of higher efficiency low external component counts and lower cost solution Furthermore LD7552B feature more protections like OLP Over Load Protection and OVP Over Voltage Protection to elimi...

Page 20: ...w input voltage is built in Built in reference voltage 2 5v circuit with output pin Dead time over the whole range of possible to adjust half period of whole duty range Recommendable for regulator in...

Page 21: ...1 6 DT1 Output 1 dead time soft start setting 7 OUT1 Output 1 8 GND Ground 9 Vcc Power Supply 10 OUT2 Output 2 11 DT2 Output 2 dead time soft start setting 12 FB2 Output for error amplifier 2 13 INV2...

Page 22: ...before proceeding White Balance adjustment 1 Adjust of White Balance 1 How to do the Chroma 7120 MEM Channel setting A Reference to chroma 7120 user guide B Use SC key and NEXT key to modify xyY valu...

Page 23: ...indicator reached the value G 100 6 Adjust the BLUE of color1 on factory window until chroma 7120 indicator reached the value B 100 7 Repeat above procedure item 4 5 6 until chroma 7120 RGB value meet...

Page 24: ...to on to quit from factory mode 2 Geometry 1 Set cross hatch pattern and preset timing as timing table listed 2 Change to each mode in turn and wait for the monitor finish auto alignment and save pres...

Page 25: ...5kHz Yes 2 640 x 480 50Hz Yes 3 640 x 480 60Hz 31 5kHz Yes 4 640 x 480 67Hz 35 0kHz Yes 5 640 x 480 72Hz 37 9kHz Yes 6 640 x 480 75Hz 37 5kHz Yes 7 640 x 480 85Hz 43 27kHz Yes 8 720 x 400 70Hz 31 5kHz...

Page 26: ...be adjustable to be within the screen frame Figure 3 4 RGB Color Performance RGB Color Intensities Contrast of each R G B color should be normal Figure 4 5 6 5 Screen Uniformity Flicker Full White Sh...

Page 27: ...ern Figure1 Gray Scale Pattern Figure2 Horizontal Vertical Thickness Pattern Figure 3 R Color Pattern Figure 4 G Color Pattern Figure 5 B Color Pattern Figure 6 24 ViewSonic Corporation Confidential D...

Page 28: ...Auto Image Adjust Please select and enter Auto Image Adjust function on Main Menu to see if it is workable The Auto Image Adjust function is aimed to offer a better screen quality by built in ASIC Fo...

Page 29: ...n function to adjust the video boundary to be full scanned and within screen frame White Balance Test Signal 640 480 60Hz Test Pattern White and Black Pattern 1 5 8 R G B Colors Contrast Test Signal 1...

Page 30: ...024 768 60 70 72 75 85Hz 1280 1024 60 75Hz Normally when the primary mode 1280 1024 60Hz is well adjusted and compliant with the specification the secondary display modes will also be compliant with t...

Page 31: ...atest version 1 Equipment Needed VA502mb VA702mb Monitor Fixture for Firmware Upgrade Power Adapter P N 47 58201 001 1 for Fixture VGA Cable P N 42 59901 003 1 Pin 4 11 should be connected to GND PC P...

Page 32: ...itor 2 5 Connect P3 to the Signal Generator eg Chroma2326 for verifying it after the operation being completed 2 6 Connect PC to the additional monitor P2 to LPT Cable JP1 to Power Adapter P1 to VGA C...

Page 33: ...47 on E2PROM Device Setting flame Step 4 Click Connect button On this step if the connection is successful the Entry ISP Mode Dialog will be showed If not the error dialog will be done Step 5 Click De...

Page 34: ...corresponding directory Step 7 Click Auto button Execute the flashing action by clicking the Run button Step 8 If the flashing F W has been completed Ok message will be showed on the right TextBox 31...

Page 35: ...t P2 and monitor of Fixture with VGA ports of VA502mb VA702mb by VGA Cable 3 2 2 Connect P1 of Fixture with Printer port of PC by LPT Cable 3 2 3 Plug Power Adapter to Fixture 3 2 4 Connect Power Cord...

Page 36: ...3 3 DDC Key In Procedure Sep1 Select and execute DDc Key In program Sep2 Inpute the S N and execute Enter 33 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 37: ...Sep3 Key the Enter and write the data Sep4 If ddc program OK and show data compare ok 34 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 38: ...5 7 Packing Procedure 35 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 39: ...and the stand Picture 2 3 3 Disassemble the 4 screws that fix the back cover remove the back cover Picture 4 4 Disassemble the shield and remove the aluminum foil Picture 5 6 5 Disassemble the screws...

Page 40: ...Picture 3 Picture4 Picture 5 Picture 6 Picture 7 37 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 41: ...Picture 8 Picture 9 Picture 10 Picture11 38 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 42: ...39 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 6 Troubleshooting Flow Chart...

Page 43: ...7 Block Diagram 40 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 44: ...Volume VCC5V VCC12V VCPU RXD TXD AD0 AD1 AD2 AD3 VCC5V B5 5 PANEL INTERFACE VLCD PB 0 9 PA 0 9 VAA4 PB 0 9 VLCD B4 2 POWER onPanel_5V 3 3V onBACKLITE AdjBACKLITE VCC3 3 VCC2 5 VAA1 VAA2 VAA3 VAA4 VCC...

Page 45: ...F VAA3 VCC5V C211 47uF 16V U202 AIC1084 33M 3 1 2 VIN ADJ VOUT R201 4 7K 1 16W TO 263 VAA4 4 R205 4 7K 1 16W AdjBACKLITE 4 VCC5V C202 220uF 25V D202 GS1D VCC12V C216 0 1uF VCC5V GND DIM VCC5V C207 0 1...

Page 46: ...301 DB15 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 C309 0 047uF R313 2 2K 1 16W D303 BAV99 3 1 2 VCC5V R307 100 1 16W D313 BAV99 3 1 2 FB302 0 1 16W R312 100 1 16W CLK 4 D310 BAV99 3 1 2 D305 BAV70 1 2 3 TX...

Page 47: ...NDC GNDC GNDC GNDP GNDC XIN XOUT LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M NC LVB3P NC LVB3M NC LVBCKP NC LVBCKM NC LVB2P NC LVB2M NC LVB1P NC LVB1M NC LVB0P NC LVB0M DDC1_CLK GPO8 DDC1_DAT GPO7 ADO NC AD3...

Page 48: ...LVBCKM RXO0 C509 47uF 16V LVA2P RXO2 PB9 RXO2 RXOC LVBCKP PB4 LVB0M LVA3M RXEC LVB1P RXO3 PB2 RXE1 PA 0 9 LVA1M PB3 LVB3M RXE1 LVB3P LVA0M LVB0M LVACKM RXOC RXO1 RXO1 LVA3P RXE0 PA 0 9 4 R502 0 1 16W...

Page 49: ...R617 120 1 16W Mute_key R629 4 7K 1 16W ST_DET1 3 VCPU AD1 4 R605 10K 1 16W DDC_CLK 3 OUT R C604 22pF VCC12V R639 100 1 16W VCPU Volume 4 R641 NC R635 100 1 16W VCPU LEFT R604 10K 1 16W VCC12V 2 SDA...

Page 50: ...3 HVL 1 R212 3 9K 1 16W Q202 DTA144WKA C221 0 47uF 25V C215 22pF 6KV D207 1N4148 R240 51K 1 16W Q210 2SC5706 1 2 3 R205 47K R204 10K 1 16W Q205 MPS3904 R225 1K 1 16W Q207 MPS3906 C209 1uF 25V C208 330...

Page 51: ...20B R908 10 1 16W C902 0 001uF 160V D903 1N4148 C922 1000uF 16V GND SW_ON OFF CN902 NC 1 2 C936 0 1uF R910 4 7K 1 16W R920 47 1 2W C907 10uF D910 31DQ10 Q903 2SK2996 C905 100uF 400V D905 1N4148 CN901...

Page 52: ...6K 12V R212 220K R203 10K C211 100 pF CN203 WAFER 4P2 0 R A 1 2 3 4 U201 TDA7496L 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 GND GND GND INL VAROUT_L VOLUME VAROUT_R NC INR SVR STBY MUTE GND...

Page 53: ...9 PCB Layout Diagrams MAIN BOARD 50 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 54: ...POWER BOARD 51 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 55: ...52 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 68 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 56: ...53 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 57: ...AUDIO BOARD 54 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 58: ...KEY BOARD 55 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 59: ...10 Exploded Diagram and Exploded Parts List 56 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...

Page 60: ...INGE 1 7 N A Q34G1273 E7 1L STAND 1 8 N A 33G4695 1 C CLAMP 1 9 N A 15G5791 1 Vesa BKT 1 10 N A Q34G1298 E7 2L Rear cover 1 11 N A 85G654 3 Main shield 1 12 B 00008247 PKCC1521SVE1P Power board 1 13 B...

Page 61: ...58 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 Packing for Shipping...

Page 62: ...2 1 3 N A Q45G76 28 CK2 PE BAG 1 4 N A Q70G1500 709 1B CD manual 1 5 N A Q41G7800 709 19A QSG 1 6 N A Q45G88 609 EPE cover 1 7 N A VA502mb Monitor 1 8 N A 45G88 609 EPE cover 1 9 N A Q45G88 607 CK2 P...

Page 63: ...7ET2 U601 20 Integrated Circuit M24C02 WMN6TP E 00008256 56G1133 20 U301 21 Integrated Circuit M24C02 WMN6TP E 00008257 56G1133516 U602 22 LCD Panel SVA150XG04TB E 00008258 750GLD504TB 31 23 Screw HW...

Page 64: ...052G 1191 GLASS CLOTH 450 32 N A 052G 1192 GLASS CLOTH 450 33 N A 052G 1211 A 165MINIUM TAPE 1 34 N A 052G 4 1 SMALL TAPE 0 95 35 N A 052G6020 2 PROTECT FILM 0 1 36 N A 078G 314 2 4028 SPEAKER 8OHM 1...

Page 65: ...HC 49US X601 1 98 N A 093G 22 55 J 20MHz 20PF 49US X601 1 99 N A AIC560KV8V29P MAIN BOARD FOR AI 1 100 B 00008246 KEPC560KE3O9P KEY BOARD 0 101 N A 033G3802 2H WAFER 2P RIGHT ANGLE CN103 1 102 N A 033...

Page 66: ...LL17T 2LSG ADAPTOR BY LISHIN T901 0 169 N A 084G 7H200 SL 250V 2A LIHEL FUSE F901 1 170 N A 088G 30229C PHINE JACL CN301 1 171 N A 088G 30229T AUDIO IN JACK CN301 0 172 N A 093G 50460 8 BRIDGE 2KBP06M...

Page 67: ...02 CHIPR 1K OHM 5 1 16W R624 1 239 N A 061L0603103 CHIPR 10K OHM 5 1 16W R407 1 240 N A 061L0603103 CHIPR 10K OHM 5 1 16W R406 1 241 N A 061L0603103 CHIPR 10K OHM 5 1 16W R405 1 242 N A 061L0603103 CH...

Page 68: ...04 32 CHIP 0 1UF 50V X7R C421 1 310 N A 065G0603104 32 CHIP 0 1UF 50V X7R C423 1 311 N A 065G0603104 32 CHIP 0 1UF 50V X7R C425 1 312 N A 065G0603104 32 CHIP 0 1UF 50V X7R C426 1 313 N A 065G0603104 3...

Page 69: ...32B BY FULL POWER SMT D322 0 378 N A 093G 39149 MLL5232B BY FULL POWER SMT D321 0 379 N A 093G 39149 MLL5232B BY FULL POWER SMT D320 0 380 N A 093G 39149 MLL5232B BY FULL POWER SMT D319 0 381 N A 093G...

Page 70: ...CHIPR 2 4K OHM 5 1 8W R226 1 448 N A 061L1206242 CHIPR 2 4K OHM 5 1 8W R227 1 449 N A 061L1206472 CHIP 4 7KOHM 5 1 4W R909 1 450 N A 061L1206472 CHIP 4 7KOHM 5 1 4W R910 1 451 N A 061L1206472 CHIP 4...

Page 71: ...114 1 520 N A 095G 90 23 JUMPER J115 1 521 N A 095G 90 23 JUMPER J107 1 522 N A 095G 90 23 JUMPER J106 1 523 N A 095G 90 23 JUMPER J105 1 524 N A 095G 90 23 JUMPER J102 1 525 N A 095G 90 23 JUMPER J10...

Page 72: ...Location Universal number Q ty 556 N A 067G 2154797NT LOW ESR 4 7UF 20 50V BY CHEM C207 1 557 N A 067G 3052207NT GP KME50VB22M TP5 5 11 C907 1 558 N A 093G 6026W52T FR107 D901 1 69 ViewSonic Corporat...

Page 73: ...cuit Description 5 Adjustment Procedure 6 Troubleshooting Flow Chart 7 Block Diagrams 8 Schematic Diagrams 9 PCB Layout Diagrams 10 Exploded Diagram and Exploded Parts List 11 Recommended Spare Parts...

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