ViewSonic VX715 Service Manual
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ViewSonic VX715 Service Manual

ViewSonic VX715 Service Manual

17” color tft lcd display
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Service Manual

ViewSonic VX715
Model No VS10057
17" Color TFT LCD Display
Manufacture Date: Jan-10-05

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Summary of Contents for ViewSonic VX715

  • Page 1: Service Manual

    Service Manual ViewSonic VX715 Model No VS10057 17” Color TFT LCD Display Manufacture Date: Jan-10-05...

  • Page 2: Revision History

    ViewSonic Corporation. Disclaimer ViewSonic makes no representation or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranty of merchantability of 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.

  • Page 3: Table Of Contents

    3. Front Panel Function Control Description 4. Function Module Description 5. Adjusting Produce 6. Trouble Shooting Flow Chart 7. Recommended Spare Parts List 8. Exploded Diagram and Spare Parts List 9. Block Diagram 10. Schematic Diagram 11. PCB Layout Diagram ViewSonic Corporation...

  • Page 4: Precautions And Safety Notices

    5mm away from circuit board. 3. Keep wires away from high voltage, high temperature components and sharp edges. 4. Keep wires in their original position so as to reduce interference. 5. Usage of this product please refers to also user’s manual. ViewSonic Corporation...

  • Page 5: Specification

    16. 832 x 624 @ 75Hz, 49.7kHz 17. 1024 x 768 @ 60Hz, 48.4kHz 18. 1024 x 768 @ 70Hz, 56.5kHz 19. 1024 x 768 @ 72Hz, 58.1kHz 20. 1024 x 768 @ 75Hz, 60.0kHz 21. 1024 x 768 @ 85Hz, 68.67kHz ViewSonic Corporation...
  • Page 6 Pin Number Pin Function Red video input Green video input Blue video input No Connection Ground Red video ground Green video ground Blue video ground H/V sync ground No connection (SDA) Horizontal sync (Composite sync) Vertical sync (SCL) ViewSonic Corporation...
  • Page 7 TMDS negative differential input, channel 0 RX0+ TMDS positive differential input, channel 0 Logic Ground Reserved 20 Reserved. No connection Reserved 21 Reserved. No connection Logic Ground RXC+ TMDS positive differential input, reference clock RXC- TMDS negative differential input, reference clock ViewSonic Corporation...

  • Page 8: Front Panel Function Control Description

    3. Also a shortcut to toggle between analog and digital connections. Power On/Off 1.Scrolls through menu options and adjusts displayed control. 2.Also a shortcut to display the contrast adjustment control screen ViewSonic Corporation...
  • Page 9 Adjust your computer’s graphic card so that is outputs a video signal 1280×1024@60Hz to the LCD display. If necessary, make small adjustments using H-Position and V-Position until the screen image is completely visible. (The black border around the edge of the screen should barely touch is illuminated “active area” of the LCD display.) ViewSonic Corporation...
  • Page 10 9300K — Adds blue to the screen image for cooler white (used in most office setting with fluorescent lighting). 6500K — Adds red to the screen image for warmer white (used in most office setting with fluorescent lighting). ViewSonic Corporation...
  • Page 11 Vertical Position moves the screen image up or down. Horizontal Size adjusts the width of the screen image. Fine Tune sharpens focus by aligning the illuminated text and or graphic characters. Sharpness adjusts the clarity and focus of the screen image. ViewSonic Corporation...
  • Page 12 Memory Recall returns adjustments to the original factory settings if the display is operating in a factory Preset Timing Mode listed in this user guide. Exception: This control does not affect changes mode with the User Color control, Language and Power Lock setting. ViewSonic Corporation...
  • Page 13 [1] + [▼] + [▲] White Balance. (Not shown on user’s guide) [1] + [▼] Power Lock [1] + [▲] OSD Lock [2] + [ ] Factory Mode Remark: All the short cuts function are only available while OSD off ViewSonic Corporation...

  • Page 14: Function Module Description

    The Power Board will provide AC to DC Inverter voltage to drive the backlight of panel and the Main Board chips each voltage. Monitor Block Diagram Flat Panel and CCFL Drive. CCFL backlight RS232 Connector Power Board Main Board For white balance (Include: adapter, inverter) adjustment in factory mode Video signal, DDC Key Board AC-IN HOST Computer 100V-240V ViewSonic Corporation...
  • Page 15 4.2 POWER BLOCK FUNCTION DESCRIPTION Inverter Block Function ViewSonic Corporation...
  • Page 16 Power Block Function ViewSonic Corporation...
  • Page 17 24C02: EEPROM, is used to save DDC date which contains the basic parameter of facility, supplier, product name, maximum H-frequency, support resolution and so on. M24C16: EEPROM, is used to save Auto config data, white balance data, the state of power key and power on counting data. ViewSonic Corporation...
  • Page 18 2FBK Error amplifier 2 output Positive input error 1FBK Error amplifier 1 output 2IN+ amplifier Output 1 dead time/soft start Positive input error 1DTC 2IN- setting amplifier 1OUT Output 1 Timing latch setting Reference voltage output Ground (2.5v) ViewSonic Corporation...
  • Page 19 ON/OFF control: When it works well, the outputs are low level, and high in saving energy state. Brightness control: When it works well, the output PWM pulse from PIN55 of IC101 adjusts the brightness, the smaller the duty, and the higher the brightness. ViewSonic Corporation...

  • Page 20: Adjusting Produce

    B. Use “ SC” key and “ NEXT” key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust 2). Setting the color temp. You want A. MEM.CHANNEL9 (9300 color): 9300 color temp. parameter is Wx = 0.283 ±0.03;Wy = 0.298 ±0.03; ViewSonic Corporation...
  • Page 21 5400 color temp. parameter is Wx = 0.335±0.03;Wy = 0.350 ±0.03; Y = 250 ±20 cd/m 3). Into factory mode of VX715 A. First Power off, then press Switch 2 button along with press Power button will activate the factory mode, and then MCU will do AUTO LEVEL automatically.
  • Page 22 2). Change to each mode in turn and wait for the monitor finish auto-alignment and save press before change to next mode. 3). Until all of modes are adjusted, exit OSD menu and press PWR OFF to exit factory mode. 5.4 Firmware update procedure 1. Equipment needed: VX715 PC (Personal computer) LPT cable 12V DC Firmware upgrade program...
  • Page 23 2. Connection For 12V DC For PC COM port For monitor ViewSonic Corporation...
  • Page 24 Remark: 1.Cancel J6 and J7. 2. Connect Pin11 of U3 to Pin12 of D-SUB, and Pin12 of U3 to Pin 15 of D-SUB. ViewSonic Corporation...
  • Page 25 2. All along press key [▼], [2] of the monitor, which will be written (the second key and fourth key count from left to right), and pull out and insert the 220V AC plug of power cable to make the monitor entering ISP Write mode at the same time, until ’ISP’ appeared; ViewSonic Corporation...
  • Page 26 3. Open “8051IspWriter.exe” program in PC, click ”Select Chip” to select the type of the MCU:”W78E65” (see figure 1), then click “Select Bank0” to select the relevant firmware: vsc-8131b-CPT17EA03-v015.hex, and select the right file format “inte He” (see figure 2). Figure 1 ViewSonic Corporation...
  • Page 27 2. After the ISP written OK, click button ”OK”, then click ”eXit LD” to make the Monitor out of ISP writer mode, to get into user Mode; 3. Repeat the above steps for the next monitor. c. Attention 1.Ensure supplying normal power to PC, ISP Writer Board and monitor, during ISP Writing. 2.If ISP Write fail, change the MCU ViewSonic Corporation...

  • Page 28: Trouble Shooting Flow Chart

    Check U102 Data-output Block Replace IC102 (RTD2523) Replace Power board and Check Inverter control relative circuit Re-do White balance adjust Note: 1. If replace “Main-Board”, Please re-do “DDC-content” programmed & “White-Balance”. 2. If replace “Power Board” only, Please re-do “ White-Balance” ViewSonic Corporation...
  • Page 29 Check RTD2523 (IC101) signal output (pin73-94) Check RTD2523 operation Is the waveform ok? condition (HS, VS, CRYSTAL) Check relative circuit Replace RTD2523 (IC101) or If Main Board being replaced, please replace main board do the DDC – content reprogrammed ViewSonic Corporation...
  • Page 30 6.4 Keypad Board OSD is unstable or not working Is Keypad board connecting normally Connect Keypad Board Is Button Switch normally Replace Button Switch Is Keypad board normally Replace Keypad Board Check main board ViewSonic Corporation...
  • Page 31 Check the voltage of C905(+) Check F901, bridge rectified circuit Check start voltage for the pin3 of IC901 Check R906, R907, IC901 Check the auxiliary voltage is between 10V-16V 1) Check IC901 2) Check Q901, Q902 OVP circuit Check D910, D911, ZD904 ViewSonic Corporation...
  • Page 32 Check D201(-), D202(-) have the output of square wave at short time. CheckQ205/Q207/Q203/Q201 or /Q206/Q208/Q204/D202 Check the resonant wave of pin2 & pin5 for PT201/ PT202 Check Q209/Q210/C213 or Q211/C212/C214 Check the output of PT201/PT202 Change PT201/PT202 Check connecter & lamp ViewSonic Corporation...
  • Page 33 6.7 Software Flow Chart ViewSonic Corporation...

  • Page 34: Recommended Spare Parts List

    7. Recommend Spare Part List VX715 BOM List Remark Location Part NO Description Quantity 52L6020 1 PROTECT FILM CBPC780KCWVW CONVERSION BOARD KEPC780KC9 KEY BOARD PWPC1742CPV1 POWER BOARD 15L8012 1 MAIN FRAME 23L3178709 2A VSC17-LCD BACKCOVER 34L1326 KR B STAND-R-COVER 34L1327 KS B...
  • Page 35 CHIP 1000PF 50V NPO C104 65L0603102 31 CHIP 1000PF 50V NPO C105 65L0603102 31 CHIP 1000PF 50V NPO C106 65L0603102 31 CHIP 1000PF 50V NPO C107 65L0603102 31 CHIP 1000PF 50V NPO C111 65L0603104 32 CHIP 0.1UF 50V X7R ViewSonic Corporation...
  • Page 36 CHIP 0.1UF 50V X7R C169 65L0603104 32 CHIP 0.1UF 50V X7R C170 65L0603104 32 CHIP 0.1UF 50V X7R C171 65L0603104 32 CHIP 0.1UF 50V X7R C172 65L0603104 32 CHIP 0.1UF 50V X7R C176 65L0603104 32 CHIP 0.1UF 50V X7R ViewSonic Corporation...
  • Page 37 CHIPR 1K OHM +-5% 1/10W R121 61L0603221 CHIPR 220 OHM+-5% 1/10W R122 61L0603472 CHIPR 4.7K OHM +-5% 1/1 R123 61L0603103 CHIPR 10K OHM +-5% 1/10 R125 61L0603472 CHIPR 4.7K OHM +-5% 1/1 R126 61L0603472 CHIPR 4.7K OHM +-5% 1/1 ViewSonic Corporation...
  • Page 38 CHIPR 4.7K OHM +-5% 1/1 R182 61L0603101 CHIPR 100 OHM +-5% 1/10 R183 61L0603750 CHIPR 75 OHM+-5% 1/10W R184 61L0603101 CHIPR 100 OHM +-5% 1/10 R185 61L0603101 CHIPR 100 OHM +-5% 1/10 R186 61L0603750 CHIPR 75 OHM+-5% 1/10W ViewSonic Corporation...
  • Page 39 ZD104 93L 39146 LL5232B SMT ZD105 93L 39146 LL5232B SMT ZD106 93L 39146 LL5232B SMT ZD107 93L 39146 LL5232B SMT ZD108 93L 39146 LL5232B SMT ZD109 93L 39146 LL5232B SMT ZD110 93L 39146 LL5232B SMT AIK780KC9SMT KEY BOARD ViewSonic Corporation...
  • Page 40 PT202 80LL15T 7 YS X'FMR Q209 57L 761 6 2SC5706 DIP SANYO Q210 57L 761 6 2SC5706 DIP SANYO Q211 57L 761 6 2SC5706 DIP SANYO Q212 57L 761 6 2SC5706 DIP SANYO T901 80LL17T 2 T X'FMR ViewSonic Corporation...
  • Page 41 CHIP 47K OHM 1/10W R208 61L0603472 CHIPR 4.7K OHM +-5% 1/1 R209 61L0603472 CHIPR 4.7K OHM +-5% 1/1 R210 61L0603153 CHIPR 15KOHM+-5% 1/10W R211 61L0603153 CHIPR 15KOHM+-5% 1/10W R212 61L0603392 CHIP 3.9K OHM 1/10W R213 61L0603392 CHIP 3.9K OHM 1/10W ViewSonic Corporation...
  • Page 42 1000PF 10% Y5P 500V C924 67L215B4713HT 470UF 16V LTR471M1CF11V C925 67L215B4713HT 470UF 16V LTR471M1CF11V C929 64L700J1040AT 0.1UF 50V PEN CN901 6L 31500 EYELET D205 93L 64 1152T 1N4148 D206 93L 64 1152T 1N4148 D207 93L 64 1152T 1N4148 ViewSonic Corporation...
  • Page 43 R925 61L 17210252T 1K OHM 5% 1/4W R926 61L 17210252T 1K OHM 5% 1/4W R929 61L 17210152T 100 OHM 5% 1/4W T901 6L 31502 1.5MM RIVET ZD902 93L 39 5452T ZENER HZ12B2 ZD903 93L 39 7752T ZENER HZ5C1 ViewSonic Corporation...
  • Page 44 5L808D 1 SCREW WASHER 11L 165 1 CABLE MANAGE MENT 12L 394600 FOOT FORON 15L8019 1 LOCK-METAL 20L 013 1 BASE BRACKET 23L3178709 3A VSC17-LCD FRONT LEFT CO 23L3178709 4A VSC17-LCD FRONT LOGO 33L4727 KD L KEY PAD ViewSonic Corporation...

  • Page 45: Exploded Diagram And Spare Parts List

    8. Exploded Diagram and Spare Parts List 34L1326-1 11L165-1 34L1325 37L497-1 34L1326 20L013-1 34L1323 ViewSonic Corporation...
  • Page 46 VX715 Exploded Parts list ITEM ViewSonic P/N Description 34L1320 KS B BEZEL 34L1321 AKD B MIDDLE BEZEL 33L4728 LENS 33L4727 FUNCTION BUTTON 17” CPT PANEL 15L8012-1 MAIN FRAME 52L6025 11655 MYLAR CBPC780KCWVW MAIN BOARD PWPC1742CPV1 POWER BOARD 85L662-1 SHIELDING COVER...

  • Page 47: Block Diagram

    9. Block Diagram LCD Interface Scalar RTD 2523 Crystal (Include: ADC, OSD etc) 24.576MHz DDC2_SCL OSD Control Interface DDC_SCL EEPROM DDC2_SDA HS/VS DDC_SDA (Keyboard) 24C16 D-SUB Connector Connector EEPROM EEPROM 24C02 24C02 ViewSonic Corporation...

  • Page 48: Schematic Diagram

    R122 Q107 PANEL_PW Q103 4.7K 　 1/16W PMBS3904 BACKLIGHT PMBS3904 C180 R113 0 　 1/16W C119 0.1uF C120 0.1uF R114 NC Title +3.3V 0.1uF ViewSonic R216 NC +12V Size Document Number POWER Date: Monday, August 30, 2004 Sheet ViewSonic Corporation...
  • Page 49 ZD108 LL5232B 5.6V DDC2_SCL DGND DATA2+ DGND DATA0+ VGA_B C175 Title D113 NC/WPSA-1005-5-A D114 NC/WPSA-1005-5-A ViewSonic DGND ZD109 LL5232B 5.6V DGND ZD110 LL5232B 5.6V DDC2_SDA DGND DATA2- DGND DATA0- Size Document Number RTD2523 Date: Monday, August 30, 2004 Sheet ViewSonic Corporation...
  • Page 50 R180 C130 AT24C16N-10SC-2.7 0.1uF U107 DDC_SCL Modify 082704 DDC_SDA DDC2_SCL DDC2_SDA R221 C131 C132 M24C02WMN6 0 1/16W 　 R222 C133 C134 M24C02WMN6 Title 0 1/16W 　 ViewSonic Size Document Number MCU MTV512 Date: Monday, August 30, 2004 Sheet ViewSonic Corporation...
  • Page 51 R237 OPEN C222 　 1/16W 　 1/16W 0.47uF/25V 1uF/25V AOC (Top Victory) Electronics Co., Ltd. is power GND Title 2. FOR 17"&15" 4 LAMPS INVERTER Size Document Number PWPC1742CPV1(715L1075-1-V) is signal GND Date: Thursday, November 20, 2003 Sheet ViewSonic Corporation...
  • Page 52 C928 R924 C909 R911 0.01uF 2.4K 1/4W 　 C913 0.1uF 4.7K 　 1/4W 0.0047uF/250V(N.C) CN901 AOC (Top Victory) Electronics Co., Ltd. Title 1.POWER OUTPUT 12V & 5 V Size Document Number PWPC1742CPV1(715L1075-1-V) Date: Thursday, November 20, 2003 Sheet ViewSonic Corporation...

  • Page 53: Pcb Layout Diagram

    11 PCB Layout Diagrams 11.1 MAIN BOARD PCB ViewSonic Corporation...
  • Page 54 11.2 KEY BOARD PCB ViewSonic Corporation...
  • Page 55 11.3 POWER PCB ViewSonic Corporation...

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