ViewSonic VA503m-1 Wartungshandbuch

ViewSonic VA503b-2 VA503m-2 Model No. VS11357 15” Color TFT LCD Display (VA503b-2_VA503m-2_SM Rev. 1a Aug. 2006) ViewSonic 381 Br

Main Menu Controls Auto Image Adjust Contrast/Brightness*1 Audio Adjust (For VA503m only) Volume*3, Mute*3 Color Adjust sRGB, 9300K, 6500K(default),

AUDIO INTERFACE (SPEAKER SPECIFICATION) --- (For VA503m only) Line input connection 3.5 mm stereo jack Line input signal 1.0Vrms Line input impeda

9 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 3. Front Panel Function Control Description Adjusting the Screen ImageUse

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 auto

ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Main Menu ControlsAdjust the menu items shown below by using the up S and down

ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Control ExplanationUser Color Individual adjustments for red (R), green (G), a

ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Control ExplanationFine Tune sharpens the focus by aligning text and/or graphi

4. Circuit Description 14 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 2. Electronic Circuit Theory 2.1 Switching Mode Po

15 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 2. 2 Inverter Circuit 2.2.1 Low voltage to high voltage circuit 14VD

16 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 2.3 I/F Board Circuit 2.3.1 Power Input +3.3V is from the power board

i ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Copyright Copyright © 2006 by ViewSonic Corporation. All rights reserved.

17 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 3. FACTORY PRESET TIMING TABLE TIMING FH(KHz) FV(Hz) Sync Polarity Tot

T1 (ms) T2 (ms) T3 (ms) T4 (ms) T5 (ms) T6 (ms) T7 (ms) 0.5~10 0~50 > 200 > 200 0~50 ﹤100 > 500 5. AC Outlet Pin Assign

2 LED_GREEN Green LED lighting control 3 GND Ground 4 KEY_MENU/EXIT OSD page selection and exit 5 KEY_SELECT/AUTO Select control and au

Pin Symbol I/O Description 1 C I Control 2 L I Line Sense 3 X I External Current Limit 4 S O Source of MOSFET(GND) 5 F I Frequency 6

20 GIN0P I Analog green input 21 SOGIN0 I Sync-on-green input 22 RIN0M I Reference ground for analog red input 23 RIN0P I Analog red i

61 LVA2M O A-Link Negative LVDS Differential Data Output 62 LVA1P O A-Link Positive LVDS Differential Data Output 63 LVA1M O A-Link Nega

98 AVDD_MPLL I MPLL Power 99 GPIO_P16/PWM2 I/O General Purpose Input/Output; 4mA driving strength/ Pulse Width Modulation Output; 4mA driving st

ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 1. Key Function Description CONTROL KEY KEYS FUNCTION [AUTO] [2] By press

ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Sharpness + / - English French German Italian Spanish Finnish Japanese Simp

Deactivate Resolution Notice Menu Push button [2] under Resolution Notice OSD, select Disable ------- 3.5 Factory Mode Introduction When input

ii ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 TABLE OF CONTENTS 1. Precautions and Safety Notices 12. Specificat

27 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 6. EDID (Rewrite EDID data to EEPROM) If we need to rewrite the EEPROM da

(2). Select “Connect”, auto connect for ISP. (3). Select “Run”, start ISP. (4). When the picture show “Verify OK”, ISP finished. 28 ViewSonic

8 After repair, to ensure the quality you should do the following test and adjustment Item Content Equipment Test OSD function 1.Signal is set a

VA503m/b Assembly Block PCBA PWR& Inv/B*1 Cable Power&I/F *1 Lamp wire TAPE*2 (SCREW PW,M3*5,Ni)*5 K

VA503m/b DisAssembly Block PCBA PWR& Inv/B*1 Cable Power&I/F *1 Lamp wire TAPE*2 (SCREW PW,M3*5,N

5. Packing for Shipping and Disassembly Procedure 5.1 Packing for Shipping 5.1.1 Packing Procedure z Paste protection film to protect the monitor

5.2 Disassembly Procedure 33 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA

34 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2

35 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2

36 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2

1 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 1. Precautions and Safety Notices 1. SAFETY PRECAUTIONS This monitor is m

37 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503

38 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 6. Troubleshooting Flow Chart 1. Common Acknowledge z If you change

2. No Power & Power LED Off

3. DC output voltage is unstable Output Voltage Unstable Check Vbe of Q801 below 0.3V Check circuit if short Check ZD801, D803, D805 Chec

4. Output power is unstable Unstable power Check sampling Circuit Check R810, R8

5. Backlight can’t be turned on No raster? LED Green? Yes Yes Yes Backlight can’t

6. Black Screen and Backlight Turn on Black ScreenPower FailCheck Power Supply:Pin 1, 2 of CN102Check Power:Pin 2 of U101Check Reset Waveform(Pin

7. White Screen W hite ScreenW orkmanshipLVDS Cable ReinsertChange LVDS CableCheck VLCD is 3.3V?Check Panel-Enable ofU103(pin48) is low?LVDS Cable

8. Bad Screen Bad ScreenWorkmanshipLVDS Cable NGCheck X101, C150,C151Check Pin 37, 38, 39,40 of U103ENDLVDS Cable ReinsertChange LVDS CableCheck C

46 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 7. Recommended Spare Parts List Serial No. Prefix: QAE Rev: 1aItem ECR

2 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 4. Handling and Placing Methods Correct Methods: Incorrect Methods: Only

Rev: 1aSerial No. Prefix: QAEItem ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty1 CB-00006731 430300800640R HRN ASS'Y 8

ViewSonic Model Number: VS11357Rev: 1aSerial No. Prefix: QADItem ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty1 B-00006750

49ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 8. Exploded Diagrams and Exploded Parts List (VA503m)

50 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Exploded Diagrams and Exploded Parts List (VA503b)

51 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 ViewSonic Model Number: VS11357Rev: 1aSerial No. Prefix: QADItem ViewSon

52 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 VA503m-3 ViewSonic Model Number: VS11357Rev: 1aItem ViewSonic P/

53 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 VA503b-3 ViewSonic Model Number: VS11357Rev: 1aItem ViewSonic P/N Ref. P/N

54 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 9. Block Diagram XTAL14.318MHzTOP245YOPP/OCPLDO3.3V-1.8VTransformerOZ99

55 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 10. Schematic Diagrams ModelTitleDate Rev:ViewSonic CorporationDC to DC23

56 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 ModelTitleDate Rev:ViewSonic Corporation INPUTHSICLK_DDCPC5VVGA_CONDAT_DD

3 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Correct Methods: Incorrect Methods: Place the monitor on a clean and so

57 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 ModelTitleDate Rev:ViewSonic CorporationSCALERWPRXE1+RXE0-RXE2-MDARXEC+MC

58 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 ModelTitleDate Rev:ViewSonic CorporationKEYPADAUTO UPMENU DOWNPOWERDOWNGN

59 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 ModelTitleDate Rev:ViewSonic CorporationPOWER SUPPLYPGNDON/OFFVOLMUTEBRIG

60 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 ModelTitleDate Rev:ViewSonic CorporationINVERTER+14VBRIGHTNESS3ON/OFF3OPO

61 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 ModelTitleDate Rev:ViewSonic CorporationTDA7496LLayout guide :1. Tie the

62 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 11. PCB Layout Diagrams

63 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2

64 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2

* Reader’s Response* Dear Readers: Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products

4 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 2. Specification 1. INTPRODUCTION FEATURES VA503b-2 / VA503m-2 Size 15 “

5 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 Video Signals Video RGB (Analog) - Separate Video Impedance 75 Ohms (Ana

6 ViewSonic Corporation Confidential - Do Not Copy VA503b-2_VA503m-2 5 ELECTRICAL REQUIREMENT Horizontal / Vertical Frequency Horizontal Frequ