ViewSonic VA2013wm-4 Service Manual
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ViewSonic VA2013wm-4 Service Manual

20” color tft lcd display
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Service Manual
ViewSonic VA2013wm-4
Model No. VS12508
20" Color TFT LCD Display
(VA2013wm-4_SM Rev. 1a May. 2009)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1 Service Manual ViewSonic VA2013wm-4 Model No. VS12508 20” Color TFT LCD Display (VA2013wm-4_SM Rev. 1a May. 2009) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...
  • Page 2 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 ......................21 6. Trouble Shooting Flow Chart .................... 33 7. Block Diagrams ........................ 34 8.

  • Page 4: 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 Placing the monitor on foreign objects. That could Place the monitor on a clean and soft foam pad. scratch the surface of the panel or cause “Mura.” Place the monitor on the lap, the panel surface must The panel is placed facedown on the lap. That may be upwards.

  • 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. The OSD controls are explained at the top of the next page and are defined in “Main Menu Controls” on page 10.
  • Page 9 Do the following to adjust the display setting: 1. To display the Main Menu, press button [1]. 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 Adjust the menu items shown below by using the up ▲ and down ▼ buttons. 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 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. For example, with a “15 second”...

  • Page 13: Circuit Description

    4. Circuit Description 4.1 Main Board SCALAR IC--- NT68167FG/D(U401) The NT68167 is a highly integrated flat panel display controller that interfaces analog, digital, and video inputs. It combines a triple ADC, a high quality zoom and shrink engine, a multi-color on screen display (OSD) controller and many other functions in a single chip.
  • Page 14 Pin Assignment...
  • Page 16 DC to DC--- AP1117D33L (U701) and AP1117E18LA (U704) AP1117 is a low dropout positive adjustable or fixed-mode regulator with 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.
  • Page 17 4.2 Power Board IC901 LD7576 The LD7576X series bring high performance, combines with highly integrated functions, protections and EMI-improve solution. It’s an ideal solution for those cost-sensitive system, reducing component count and overall system cost. The LD7576X series features near-lossless high voltage startup circuit, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation.
  • Page 18 Block Diagram Name Function This pin is to program the frequency of the low frequency timer. By connecting a capacitor to ground to set the OLP delay time. And this pin can be used for latch mode protection. By pulling this pin lower than 0.8 V, the controller will be entered latch mode until the AC power-on recycling.
  • Page 19 IC801 TA9687GN 9687 is a high performance, cost-effective CCFL (Cold Cathode Fluorescent Lamp) controller designed for driving large-size Liquid Crystal Display (LCD) applications requiring 2 to 6 CCFLs. The controller converts unregulated DC voltages into a nearly sinusoidal lamp voltage and current waveforms. 9687 supports full-bridge power conversion topologies while maintaining high-efficiency operation.
  • Page 20 Pin Description Pin No. I/O1 Names Description VSEN Voltage Sense Feedback SSTCMP Capacitor for Soft-Start and Loop Compensation Timing Resistor and Capacitor for Operation and Striking Frequency Timing Resistor for Striking Frequency GNDA Signal Ground PDR2 High Side Driver Output 2 GNDP Power Ground NDR2...

  • Page 21: 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 1600 x 900) and refresh rate (or vertical frequency; example 60 Hz).
  • Page 22 Gain adjustment: Move cursor to “Factory” and press “2” key. Move cursor to “ Auto Level” and press “2” key to adjust Gain and Offset automatically; (notice：this monitor do auto level must in T144(1280X1024@60Hz) P48(32 Grays)) a. Adjust 9300K color-temperature 1.
  • Page 23 5.2 Firmware Upgrade Procedure 5.2.1 Equipment needed: VA2013wm-4 PC (Personal computer) LPT cable Firmware upgrade program ISP Board (Part No.: 715LT035-A) LPT Cable VGA Cable...
  • Page 24 Hardware Connect status 5.2.2 Update the NOVATEK’S firmware You should jump the pin to “For Flash” at ISP Board Connect to the VSC Connect to the VA2013wm-4 PC LPT Double click “Writer.exe”...
  • Page 25 This tool can auto detect the right SCALAR programe speed,the process as follow:...
  • Page 27 When auto detect is finished,click “Load File”,then chosse the firmware that you want to update...
  • Page 28 Click “Auto”,then the update will begin.Wait for a moment until the bar is 100%,the program windows will show “Programing Success”.This means the update is successful.
  • Page 29 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 monitor, you have to do the DDC key in. 5.3.1 Equipment Needed VA2013wm-4 PC (Personal computer) LPT cable...
  • Page 30 5.3.3 Connect the DDC board as follow: Connect to the Connect this port to the PC LPT VSC VA2013wm-4’s VGA 12V Input Part No.：715GT034-B Note: If you can’t update the EDID firmware, please cut off the 5th Pin of the VGA cable that connects the monitor side.
  • Page 31 For analog a. Double-click ，appear as follow Figs： b. Click c. Key in the Serial Number printed on the barcode label, then click “OK”...
  • Page 32 12 codes, for example. d. Unit appears the following Fig, writer completed.

  • Page 33: Troubleshooting Flow Chart

    6. Troubleshooting Flow Chart...

  • Page 34: Block Diagrams

    7. Block Diagram 7.1 Main Board LCD Interface (CN403) Crystal EEPROM Scalar IC NT68167 12MHz PM25LV020-100SCE 2MB (Include MCU, ADC, OSD) (X401) (U402) (U401) DDC_WP DDC_SDA DDC_SCL H sync EEROM V sync M24C02 Key Control (U101) interface (CN402) D-Sub Connector (CN101)
  • Page 35 7.2 Power Board Diode rectifier & Filter Transformer AC input Bridge (T901) Rectifier Diode rectifier EMI filter and Filter & Filter Start Circuit: R908 CN902 Feedback Over Circuit Voltage Control IC Protect MOSFET Transformer (Q805, Q806) (PT801) Inverter Control IC ON/OFF Connector Feedback...

  • Page 36: Schematic Diagrams

    Mute# VCC1.8 Mute# Mute# ESD_5V VCC1.8 VCC1.8 5VCC VCC1.8 5VCC POWER SCALER Viewsonic VA2013wm T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size CBPCRNFVWQ2 G3225-1-2-X-5-090415 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 1.0 Block Diagram...
  • Page 37 V_Sy nc I/O2 I/O3 U101 C116 0.22uF C115 AZC199-04S DDC_SCL DDC_SDA DDC_WP M24C02-RMN6TP Viewsonic VA2013wm T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size G3225-1-2-X-5-090415 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 2.INPUT...
  • Page 38 Q408 LED_ORANGE R469 100R 1/10W 5% CN407 CN408 FB410 NC/BEAD FB409 VCC3.3 TOUCH_PANEL Viewsonic VA2013wm T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size 絬 隔 瓜 絪 腹 G3225-1-2-X-5-090415 TPV MODEL Key Component 3.SCALER...
  • Page 39 PANEL_EN MMBT3904 R415 4K7 1/16W 5% C441 C421 R420 1uF/16V 0.1UF 16V 10K 1/16W 5% Viewsonic VA2013wm T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size G3225-1-2-X-5-090415 TPV MODEL 絬 隔 瓜 絪 腹...
  • Page 40 Q406 R711 22K 1/16W 5% BL_ON 5 C709 0.1UF 16V C_PANEL_INDEX Panel_ID# 5 MMBT3904 R714 Viewsonic VA2013wm T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size G3225-1-2-X-5-090415 TPV MODEL 絬 隔 瓜 絪 腹...
  • Page 41 8.2 Power Board R929 100 OHM 1/4W BD901 KBP208G C916 L905 R930 100 OHM 1/4W 0.001uF Coil +16V R903 100 OHM 1/4W ZD901 T ZX18B C918 1000uF 25V D901 Q904 FMX-12SL KTD1028 R905 0R05 1/10W 5% R906 100K OMH 2W +-5% C911 T901 R907...
  • Page 42 R817 +16V 2R2 1/8W 5% Q805 ZD802 ON/OFF RLZ5.6B ZD803 RLZ5.6B R816 2R2 1/8W 5% R802 +5Vi CN801 R803 R804 PT801 CONN AO4620 5K1 1/8W 5% 5K1 1/8W 5% POWER X'FMR C819 22R 1/8W 5% 68pF3KV C803 C815 0.1uF 0.1uF Q806 C802 R819 2R2 1/8W 5%...
  • Page 43 +5V1 +5V1 R602 C604 10K 1/10W 5% 470UF M 16V R603 10K 1/10W 5% C609 1uF/25V CONN 10K 1/10W 5% R609 U601 LOUT- SE/BTL LOUT- CN601 VOLUME LOUT+ R604 10K 1/10W 5% C601 0.47uF/16V LIN- LOUT+ ROUT+ C606 0.47uF/16V RIN- ROUT+ BY PASS ROUT-...
  • Page 44 8.3 Key Board KEY 1 R001 3K 1/10W 1% KEY 2 DOWN R002 3K 1/10W 1% POWER Y ELLOW BLUE R003 2K OHM 1% 1/10W R004 2K OHM 1% 1/10W LED001 SW01 C001 C002 0.1uF 16V 0.1uF 16V KEY1 POWER CN001 KEY2 DOWN...

  • Page 45: Pcb Layout Diagrams

    9. PCB Layout Diagrams 9.1 Main Board...
  • Page 47 9.2 Power Board...
  • Page 49 9.3 Key Board...

  • Page 50: Exploded Diagram And Spare Parts List

    10. Exploded Diagram and Spare Parts List 10.1 EPL...
  • Page 51 Explode Parts List Item Description Part Number Q'ty BEZEL LENS KEY PAD KEY BOARD PANEL MAIN BOARD-CBPCRNFVWQ2 POWER BOARD MAINFRAME SPK 4 OHM 3 W 57.5X23 180 180mm NEO REAR COVER HINGE ASS’Y STAND BASE RUBBER PAD SCREW 0G1G1030 6120 SCREW 0G1G1030 6120 SCREW...
  • Page 52 Item Description Part Number Q'ty D-SUB CABLE AUDIO CABLE POWER CORD BASE EPS(TOP) LCD MONITOR CD MANUAL EPS(BOTTOM) CARTON...
  • Page 53 10.2 Spare Parts List TA9GNFDBWBVWAN Location Part Number Description Remark 023G3178709 3A LOGO E07801 078G 31120A G SPK 4 OHM 3 W 57.5X23 180 180MM NEO E08904 089G 17356C554 AUDIO CABLE E08904 089G 17356X554 AUDIO CABLE 2nd source E08902 089G 728CAA DB D-SUB CABLE 2nd source E08902...
  • Page 54 C702 067G 4051014PT EC 100UF M 25V 6.3*11MM C449 067G 4051014PT EC 100UF M 25V 6.3*11MM U401 056G 562585 IC NT68167FG/D QFP64 U701 056G 563 52 IC AP1117D33L-13 TO252-3L DIODES U704 056G 56327A IC AP1117E18LA SOT223-3L ANACHIP U102 056G 662502 IC ESD AZC199-04S SOT23-6L U103 056G 662502...
  • Page 55 R406 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R417 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R420 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R433 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R709 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R710 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W...
  • Page 56 C415 065G040210412T CHIP 0.1UF 16V X7R C416 065G040210412T CHIP 0.1UF 16V X7R C417 065G040210412T CHIP 0.1UF 16V X7R C420 065G040210412T CHIP 0.1UF 16V X7R C431 065G040210412T CHIP 0.1UF 16V X7R C433 065G040210412T CHIP 0.1UF 16V X7R C441 065G040210412T CHIP 0.1UF 16V X7R C701 065G040210412T CHIP 0.1UF 16V X7R...
  • Page 57 ZD103 093G 39S 24 T RLZ 5.6B LLDS ZD104 093G 39S 24 T RLZ 5.6B LLDS 715G3225 1 2 MAIN BOARD 709G3225 QS001 CONSUMPTIVE ASS'Y 052G 2191 A PAPER TAPE 052G6026 3 MESH PRINTTING PAPER Q05G6054 1 SHEET Q09G6012 1 R119 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W...
  • Page 58 CN602 033G3802 4 BH CONNECTOR CN801 033G8021 2E F WAFER CN802 033G8021 2E F WAFER CN803 033G8021 2E F WAFER CN804 033G8021 2E F WAFER IC902 056G 139 3A IC PC123Y22FZ0F NR901 061G 58100 X NTC10D2-14MC C908 063G107K474 6S CAP X2 0.47UF K 275VAC C822 065G 3J6806ET CAP CER 68PF J 3KV SL...
  • Page 59 D901 093G 52 66 DIODE FMX-12SL 10A/200V TO-220 D906 093G 60269 MBRF2060CT ITO-220AB 0M1G 930 8120 SCREW Q90G6264 5 HEAT SINK 709G2892 QM001 CONSUMPTIVE ASS'Y 055G ALCOHOL 055G 23524 WELDING FLUX WITHOUT PB Q55G 100625 TIN STICK_LOW ARGENTUM IC901 056G 379128 IC LD7576 GS SOP-8 IC801 056G 608 12...
  • Page 60 RJ803 061G0805000 RST CHIP MAX 0R05 1/8W R801 061G0805103 RST CHIPR 10K OHM +-5% 1/8W R812 061G0805104 RST CHIPR 100K OHM +-5% 1/8W R840 061G0805105 RST CHIPR 1M OHM +-5% 1/8W R919 061G0805151 RST CHIPR 150 OHM +-5% 1/8W R802 061G0805220 RST CHIPR 22 OHM +-5% 1/8W R816...
  • Page 61 C807 065G0603332 32 CHIP 0.0033UF 50V X7R 0603 C808 065G0603333 32 CHIP 0.033UF 50V X7R 0603 C914 065G0603471 32 CHIP 470PF 50V X7R C915 065G0805103 32 CAP CHIP 0805 10NF K 50V X7R C912 065G0805104 32 CAP CHIP 0805 0.1UF K 50V X7R C815 065G0805104 32 CAP CHIP 0805 0.1UF K 50V X7R...
  • Page 62 IC903 056G 158 12 KIA431A-AT/P TO-92 C920 067G 2046812KT CS CAP 680UF 10V 8*11 MM F903 084G 56 4 B FUSE 4A 250V FB602 071G 55 9 T FERRITE BEAD 709G2892 QA001 CONSUMPTIVE ASS'Y PT801 006G 31502 1.5MM RIVET C932 065G 1K101 2T6921 CAP CER 100PF 1KV K Y5P R820...
  • Page 63 Q45G 88607 52 PE BAG FOR BASE Q45G 88609118 EPE BAG Q50G 4 10 Q52G6020144 PROTECT FILM E08907 S89G179T30NA08 LVDS ASSY 089F80001803BG 1.0*30*2.5-180-3-0.65*0.06 033F303FH10BK3 F1010HA-30P-BK 033F303FJSHK30 1.0S-19-30A Q40G 581709 1B CARTON LABEL Q40G0001709 2A SN LANEL 052G 1211 B CONDUCTIVE TAPE 85MM *40MM *0.09MM 052G 1209 A 200MINIUM TAPE...

  • Page 64: Recommended Spare Parts List

    11. Recommended Spare Parts List...

  • Page 65: Different Parts List

    12. Different Parts List Diversity of TA9GNFDCWBVWAC compared with TA9GNFDBWBVWAN Location Part Number Description Remark 089G420A18N IS POWER CORD 32-D001922 750GLG200W1A13N0VS PANEL LM200WD1-TLA1 GZ LGD...
  • Page 66 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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