ViewSonic VS11280 Service Manual
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ViewSonic VS11280 Service Manual

ViewSonic VS11280 Service Manual

17” color tft lcd display
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Service Manual

ViewSonic VA703b-7
Model No. VS11280
17" Color TFT LCD Display
(VA703b-7_SM Rev. 1a Apr. 2009)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic VA703b-7 Model No. VS11280 17” Color TFT LCD Display (VA703b-7_SM Rev. 1a Apr. 2009) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...

  • Page 2: Revision History

    Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. Precautions and Safety Notices ..................4 2. Specification ........................7 3. Front Panel Function Control Description ............... 8 4. Circuit Description ......................13 5. Adjusting Procedure ......................25 6. Troubleshooting Flow Chart ..................... 34 7. Block Diagrams ........................ 35 8.

  • Page 4: Precautions And Safety Notices

    1. Precautions and Safety Notices 1. Precautions and Safety Notices 1.1 Safety Precautions This monitor 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 monitor as well as the user. Carefully go over the following WARNINGS before installing and keep this guide handy.
  • Page 5 1.4 Handing and Placing Methods Correct Methods: Incorrect Methods: Only touch the metal frame of the LCD panel or the Surface of the LCD panel is pressed by fingers and that front cover of the monitor. Do not touch the surface of may cause “Mura.”...
  • Page 6 Place the monitor on the lap, the panel surface must The panel is placed facedown on the lap. That may be upwards. cause “Mura.”...

  • Page 7: Specification

    2. Specification...

  • Page 8: Front Panel Function Control Description

    3. Front Panel Function Control Description Use the buttons on the front control panel to display and adjust the OSD controls which display on the screen.
  • Page 9 Do the following to adjust the display setting: 1. To display the Main Menu, press button [1]. VA703m/VA703mb VA703b NOTE: All OSD menus and adjustment screens disappear automatically after about 15 seconds. This is adjustable through the OSD timeout setting in the setup menu. 2.

  • Page 10: Main Menu Controls

    Main Menu Controls Adjust the menu items shown below by using the up ▲ and down ▼ buttons. Control Explanation Control Explanation Auto Image Adjust automatically sizes, centers, and fine tunes the video signal to eliminate waviness and distortion. Press the [2] button to obtain a sharper image. NOTE: Auto Image Adjust works with most common video cards.
  • Page 11 Information displays the timing mode (video signal input) coming from the graphics card in ® the computer, the LCD model number, the serial number, and the ViewSonic website URL. See your graphics card’s user guide for instructions on changing the resolution and refresh rate (vertical frequency).
  • Page 12 Setup Menu displays the menu shown below: Language Select allows the user to choose the language used in the menus and control screens. Resolution Notice advises the optimal resolution to use. OSD Position allows the user to move the OSD menus and control screens. OSD Timeout sets the length of time the OSD screen is displayed.

  • Page 13: Circuit Description

    4. Circuit Description 4.1 Main Board Scalar TSUM16AWL-1(U401) The TSUM16AWL-1(U401) is total solution graphics processing IC for LCD monitors with panel resolutions up to WXGA+/SXGA+. It is configured with a high-speed integrated triple-ADC/PLL, a high quality displayprocessing engine, and an integrated output display interface that can support LVDS panel interface format. To further reduce system costs, the TSUM16AL-1 also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.
  • Page 15 PIN Function: Analog Interface Pin Name Pin Type Function HSYNC0 Schmitt Trigger Input w/ 5V-tolerant Analog HSYNC input VSYNC0 Schmitt Trigger Input w/ 5V-tolerant Analog VSYNC input REFP InternalADC top de-coupling pin REFM Internal ADC bottom de-coupling pin RIN0P Analog Input Analog red input RIN0M Analog Input...
  • Page 16 Pin Name Pin Type Function LVACKP Output A-Link Positive LVDS Differential Clock Output LVB0M Output B-Link Negative LVDS Differential Data Output LVB0P Output B-Link Positive LVDS Differential Data Output LVB1M Output B-Link Negative LVDS Differential Data Output LVB1P Output B-Link Positive LVDS Differential Data Output LVB2M Output B-Link Negative LVDS Differential Data Output...
  • Page 17 Pin Name Pin Type Function Pulse Width Modulation Output; 4mA driving strength/ PWM1/GPIO_P25 I/O w/ 5V-tolerant General Purpose Input/Output; 4mA driving strength General Purpose Input/Output; 4mA driving strength/ GPIO_P00/SAR1 I/O w/ 5V-tolerant SAR ADC Input General Purpose Input/Output; 4mA driving strength/ GPIO_P01/SAR2 I/O w/ 5V-tolerant SAR ADC Input...
  • Page 18 Flash Memory SST25LF020A/040A(U402) The SST25LF020A is accessed through the SPI (Serial Peripheral Interface) bus compatible protocol. The SPI bus consist of four control lines; Chip Enable (CE#) is used to select the device, and data is accessed through the Serial Data Input (SI), Serial Data Output (SO), and Serial Clock (SCK). The SST25LF020A supports both Mode 0 (0,0) and Mode 3 (1,1) of SPI bus operations.

  • Page 19: Pin Description

    Pin Description Symbol Pin Name Functions Serial Clock To provide the timing of the serial interface. Commands, addresses, or input data are latched on the rising edge of the clock input, while output data is shifted out on the falling edge of the clock input. Serial Data To transfer commands, addresses, or data serially into the device.
  • Page 20 DC-DC AP1117E33L(U701) AP1117 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. AP1117 is also well suited for other applications such as VGA cards.
  • Page 21 DC-DC AP1117E18LA (U702) AP1117 is a low dropout positive adjustable or fixed-mode regulator with 1A output current capability. The product is voltage specifically designed to provide well-regulated supply for low IC applications such as high-speed bus termination and low current 3.3V logic supply. AP1117 is also well suited for other applications such as VGA cards.

  • Page 22: Power Board

    4.2 Power Board Adapter PWM Controller LD7575PS (IC901) The LD7575 is a current-mode PWM controller with excellent power-saving operation. It features a high-voltage current source to directly supply the startup current from bulk capacitor and further to provide a lossless startup circuit.
  • Page 23 Pin Configuration Pin Descripptions...
  • Page 24 Inverter PWM Controller TL494IDR (IC801) The TL494 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application. The TL494 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.

  • Page 25: Adjusting Procedure

    5. Adjustment Procedure Setting the Timing Mode Setting the timing mode is important for maximizing the quality of the screen image and minimizing eye strain. The timing mode consists of the resolution (example 1280 x 1024) and refresh rate (or vertical frequency; example 60 Hz).
  • Page 26 Enter into the factory mode: AC ON the monitor with signal connected, and press “power” button to DC OFF the monitor, then press”1” and “power” button at the same time to enter factory mode; Gain adjustment: Move cursor to “Factory” and press “2” key. Move cursor to “...

  • Page 27: Firmware Upgrade Procedure

    5.2 Firmware Upgrade Procedure 5.2.1 Equipment and Kit Requirment An i486 (or above) personal computer or compatible. Microsoft operation system Windows 95/98/2000/XP. “ISP_Tool V4.4.2.7” program(or other version) Software ISP SN Alignment kits The kit contents: ISP BOARD x1 LPT cablex1 VGA CABLE X1 VA703 series ISP Board...
  • Page 28 LPT Cable VGA Cable Hardware Connect status a Connect ISP_Tool with PC by LPT Cable. b Connect Power Cord to Monitor. c Connect monitor to the ISP_Tool by VGA cable.
  • Page 29 5.2.2 The process of ISP write is as follows a. Double-click ,running the program as follows: b. Press the “Connect” button to connect ISP Mode, if connects success, it will show as the follow picture:...
  • Page 30 c. Click the “Read” item, and then load the correct firmware, it will show as follow picture: d. Click “Auto” item, and then click”Run”, it will auto run. If it burn in success, it will show as the follow picture:...
  • Page 31 5.3 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 monitor, you have to do the DDC key in. 5.3.1 Equipment and Kit Requirment VA703 series PC (Personal computer)
  • Page 32 For analog: a. Double-click , appear as follow Figs: b. Click on the top left conner of the WinDDC. c. Key in the Serial Number printed on the barcode label, then click “OK” Q85060100001 12 codes, for example.
  • Page 33 d. Unit appears the following Fig, writer completed.

  • Page 34: Troubleshooting Flow Chart

    6. Troubleshooting Flow Chart...

  • Page 35: Block Diagrams

    7. Block Diagrams 7.1 Main Board Crystal Panel Interface 14.31818MHZ (CN703) (X401) Flash ROM Scalar IC TSUM16AWL MSTAR Key Control interface SST25LF020A (Include MCU, ADC, OSD) (CN404) (U402) (U401) H sync V sync D-Sub Connector (CN401)
  • Page 36 7.2 Power Board +14V AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter (T901) Start Resistor (R905) PWM Control LD7575PS Power Switch (IC901) (Q900) Regulator Photocoupler (IC903) (IC902) Transformer +14V MOSFET (PT801,PT802) (Q804,Q809) Inverter Connector MOSFET (CN801,CN802) (Q805,Q806,Q810,Q811) (CN803,CN804) Transistor ON/OFF...

  • Page 37: Schematic Diagrams

    8. Schematic Diagrams 8.1 Main Board 715G2467 1 RED+ FB401 R404 C404 0.047uF RED- 0R05 1/10W 56.2OHM 1/16W 1% GREEN+ FB402 R406 C406 0.047uF GREEN- 0R05 1/10W 56.2OHM 1/16W 1% BLUE+ FB403 R408 C408 0.047uF BLUE- 0R05 1/10W 5% 56.2OHM 1/16W 1% PC5V R410 470R 1/16W...
  • Page 38 CN703 LVB0M RXO0- RXO0+ LVB0P LVB1M RXO1- RXO1+ LVB1P LVB1P LVB2M RXO2- RXO2+ LVB2P PA[0..9] LVBCKM RXOC- RXOC+ LVBCKP PA[0..9] LVB3M RXO3- RXO3+ LVB3P LVA3P LVA0M RXE0- RXE0+ LVA0P LVA3M LVA1M RXE1- RXE1+ LVA1P LVACKP LVA2M RXE2- RXE2+ LVA2P LVACKM LVACKM RXEC- RXEC+...
  • Page 39 +12V R701 CN701 R702 1K 1/16W BL_ADJ +12V 4K7 1/16W P W M The type of R707 and R706 are 1206 The type of R713 and R714 are 1206 R703 4K7 1/16W SOT-223 Adj_BACKLIGHT 4 C703 NC/1 F 6.3V 　 Q701 R707 PMBS3904...
  • Page 40 The Current of VCC3.3 AVDD AVDD_DVI VPLL AVDD VDDP VDDC FB406 AVDD is arround VMPLL 68.1 mA.(Analog) VCC3.3 600 OHM C435 The Current of AVDD is arround VCC3.3 0.047uF 18.1 mA.(Digital VCTRL PA[0..9] R510 PA[0..9] 10K 1/16W LVA3P R509 RIN0P LVA3M GNDR RIN0M...
  • Page 41 8.2 Power Board 715G2594 2 　 1/4W R951 　 1/4W R952 BD901 2KBP08M C920 　 1/4W R953 0.001uF/500V FB903 BEAD D920 SBT150-10LST F902 T901 0R05 1/4W +14V L921 1.1uH L902 R907 ZD920 R909 100K 　 R931 150ohm RLZ16B C910 C907 1/4W 　...
  • Page 42 PT801 POWER X'FMR R801 NC CN801 CONN +14V L801 C801 73G 174 35DNA R802 5pF/6KV 100R 1/8W R850 R810 R804 NC CN802 R805 CONN Q802 R808 Q801 10K 1/10W 　 1/4W 10K 1/10W PDTC144WK PDTA144WK 　 1/4W ON/OFF R806 R807 1K 1/10W 1% 1K 1/10W 1% C821...
  • Page 43 8.3 Key Board 715G1898 1 2 POWER_KEY 3.3V R001 R002 3K9 1/10W 5% 3K9 1/10W 5% KEY _AUTO KEY _RIGHT R003 3K9 1/10W 5% J001 J002 JUMPER KEY _MANU JUMPER KEY _LEFT LED_Y R005 1K 1/10W 5% ZD001 C001 LED_G D001 D002 C003...

  • Page 44: Pcb Layout Diagrams

    9. PCB Layout Diagrams 9.1 Main Board 715G2467 1...
  • Page 46 9.2 Power Board 715G2594 2...
  • Page 48 9.3 Key Board 715G1898 1 2...

  • Page 49: Exploded Diagram And Spare Parts List

    10. Exploded Diagram and Spare Parts List 10.1 EPL...
  • Page 50 Exploded Parts List Item Description Q'ty BEZEL FUNC.BUTTON SPEAKER (Only for VA703m/VA703mb) KEY BOARD SCREW 0Q1G 330 6120 SCREW 0M1G 330 5120 AC SOCKET BRKT SCREW 0M1G1730 6120 MAIN FRAME HYDIS HINGE COVER SCREW 0M1G1730 6120 HINGE MYLAR SHIELD VESA BKT REAR COVER SCREW 0M1G 330 6 47 CR3...
  • Page 52 Packing Part List Item Descripiton Q’ty CARTON HANDLE1 HANDLE2 PE BAG MANUAL CD MANUAL PE BAG FOR BASE MONITOR VA703 series PE BAG FOR MONITOR AUDIO CABLE (Only for VA703m/VA703mb) POWER CORD SIGNAL CABLE BASE Remark: For the detailed P/N,please refer to the “10.2 Spare Parts List”...
  • Page 53 10.2 Spare Parts List VA703b-7 T79CMEDKFVV5NC Location Part No. Description Remark 019G6014 1 TIE FOR STRAP 023G3178709 4A VSC17-LCD FRONT LOGO 023G3178709 6A BIRD LOGO 033G5019 KD C FUNC.BUTTON 040G 581 26704 SHIPPING LABEL 041G 68508 A CONTROL CARD 044G9003202 CORNER PAPER 045G 77501 BARCODE RIBBON...
  • Page 54 0M1G1730 6120 SCREW,42-D020523 0M1G2640 10 47 CR3 SCREW 0Q1G 330 6120 SCREW 42A9930001 705GQ934007 17" LCD STAND/BASE ASS'Y 0M1G 340 6 47 CR3 SCREW 0Q1G1140 8120 SCREW 0Q1G1140 10120 SCREW A34G0027AFW 2B0100 STAND A34G0028AFW 1B0130 BASE J37G 561 4 HINGE 750GLC170A7P23N0VS PANEL CLAA170EA07P 8J4 FZ CPT 756GQ9CB VV006...
  • Page 55 Q702 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q701 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q403 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q404 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q704 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q702 057G 417 12 T KEC 2N3904S-RTK/PS Q701 057G 417 12 T KEC 2N3904S-RTK/PS Q404 057G 417 13 T KEC 2N3906S-RTK/PS Q403...
  • Page 56 R451 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R449 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R445 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R443 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R411 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R446 061G0402200 RST CHIP 20R 1/16W 5%...
  • Page 57 FB405 061G0805000 RST CHIP MAX 0R05 1/8W R706 061G1206000 RST CHIP MAX 0R05 1/4W R713 061G1206151 RST CHIPR 150 OHM +-5% 1/4W R714 061G1206151 RST CHIPR 150 OHM +-5% 1/4W C440 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C455 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C704...
  • Page 58 C444 065G0402473 12 CHIP 0.047UF 16V X7R C445 065G0402473 12 CHIP 0.047UF 16V X7R FB406 071G 56Z601 M CHIP BEAD 600OHM FB407 071G 56Z601 M CHIP BEAD 600OHM FB408 071G 56Z601 M CHIP BEAD 600OHM FB409 071G 56Z601 M CHIP BEAD 600OHM FB404 071G 59B121 TB160808B...
  • Page 59 077G 600 1GCJ TACT SWITCH TSPB-2 -NP 077G 600 1GCJ TACT SWITCH TSPB-2 -NP 077G 600 1GCJ TACT SWITCH TSPB-2 -NP 077G 600 1GCJ TACT SWITCH TSPB-2 -NP 077G 600 1GCJ TACT SWITCH TSPB-2 -NP 077G 600 1GNA TACK SWITCH 077G 600 1GNA TACK SWITCH 077G 600 1GNA...
  • Page 60 C901 065G305M1022EM Y2 1000PF +-20% 250VAC C903 065G305M2222BP 2200PF +-20% C900 065G306M2222BP 2200PF +-20% 250VAC C907 067G 40Z10115K CAP 105℃ 100UF M 450V C925 067G215D4714KV E.C 105℃ CAP 470UF M 25V ED SERIES C811 067G215D4714KV E.C 105℃ CAP 470UF M 25V ED SERIES C805 067G215D4714KV E.C 105℃...
  • Page 61 709G2594 QM001 CONSUMPTIVE ASS'Y 049G 51 1A ERADICATOR 052G 2191 A PAPER TAPE 055G ALCOHOL 055G 23524 WELDING FLUX WITHOUT PB Q51G 6 4509 GLUE_RTV Q55G 100622 TIN STICK(SAC0507) Q55G 100625 TIN STICK_LOW ARGENTUM IC801 056G 379 22 IC TL494IDR SOIC-16 IC901 056G 379 61 LD7575PS SOP-8...
  • Page 62 R831 061G0603100 2F RST CHIPR 10K OHM +-1% 1/10W R824 061G0603100 2F RST CHIPR 10K OHM +-1% 1/10W R819 061G0603100 2F RST CHIPR 10K OHM +-1% 1/10W R808 061G0603100 2F RST CHIPR 10K OHM +-1% 1/10W R813 061G0603101 RST CHIPR 100 OHM +-5% 1/10W R823 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W...
  • Page 63 R922 061G0805331 RST CHIPR 330 OHM +-5% 1/8W R924 061G0805360 1F RST CHIPR 3.6K OHM +-1% 1/8W R908 061G0805471 RST CHIPR 470 OHM +-5% 1/8W R825 061G0805510 2F RST CHIPR 51K OHM +-1% 1/8W J807 061G1206000 RST CHIP MAX 0R05 1/4W J813 061G1206000 RST CHIP MAX 0R05 1/4W...
  • Page 64 C815 065G0603222 22 CHIP 2200PF 25V X7R C817 065G0603222 22 CHIP 2200PF 25V X7R C818 065G0603222 22 CHIP 2200PF 25V X7R C823 065G0805104 22 0.1UF +-10% 25V X7R 080 C824 065G0805104 22 0.1UF +-10% 25V X7R 080 C912 065G0805104 32 CAP CHIP 0805 0.1UF K 50V X7R C916 065G0805104 32...
  • Page 65 IC903 056G 158 10 T IC AS431AZTR-E1 TO-92 R916 061G152M43852T RST MOF 0R43 5% 2W C910 065G 2K152 1T6921 1.5NF/2KV Y5P +-10% C920 065G517K102 5T 1000PF 10% Y5P 500V C921 065G517K102 5T 1000PF 10% Y5P 500V C911 067G 2152207NT KY50VB22M-TP5 5*11 FB901 071G 55 29 FERRITE BEAD...
  • Page 66 D802 093G 64 33 DIO SIG SM BAV99 (PHSE)R D809 093G 64 33 DIO SIG SM BAV99 (PHSE)R D810 093G 64 33 DIO SIG SM BAV99 (PHSE)R D806 093G 64 38 D DIODE BAW56 DIODES D808 093G 64 38 D DIODE BAW56 DIODES Q804 057G 763 6...
  • Page 67 Q45G 76 28 RN PE BAG MANUAL Q70G7008709 3A CD FOR VA703 040G 58162435A P/N LABEL FOR MANUAL PE BAG Q40G 17N709 2A RATING LABEL Q40G 581709 1B CARTON LABEL Q40G0001709 2A SN LANEL...

  • Page 68: Recommended Spare Parts List

    11. Recommended Spare Parts List...
  • Page 69 Reader’s basic dada: Name: Title: Company: Add: Tel: Fax: E-mail: After completing this form, please return it to ViewSonic Quality Assurance in the USA at facsimile 1-909-839-7943. You may also e-mail any suggestions to the Director, Quality Systems & Processes (marc.maupin@viewsonic.com)

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