ViewSonic Vp9303 Service Manual

 
 
 
 
 
 
ViewSonic Corporation  Confidential - Do Not Copy  VP930-3_VP930b-3 
 18  

INVERTER 
In order to drive the CCFLs embedded in the panel module, there is a half bridge inverter to convert by 
the controller. 
The input 12V up to hundreds of AC voltage output. 
The inverter is formed by symmetric in order to drive the separate lamp modules. 
The input stage consists of a PWM controller, half bridge inverter, and switching MOSFET to convert 
DC input into AC output. 
The output stage consists of a tuning capacitor, coupling capacitor, transformer, push-pull MOSFET 
pair to boost...

ViewSonic Corporation Confidential - Do Not Copy  VP930-3_VP930b-3 
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5. Adjustment Procedure 
 
 
 
1. Function Test 
1.1 Product  - 19” LCD Monitor 
1.2 Test Equipment  - Color Video Signal & Pattern (or PC with SXGA resolution and a sound card) 
1.3 Test Condition  Before function test and alignmen t, each LCD Monitor should be run- in and warmed up for at least 
30 minutes with the following conditions: 
(a) In room temperature, 
(b) With full-white screen, RGB, and Black 
(c) With cycled display...

 21  1024 x 768  @  60 Hz,  48.4   KHz  Yes  Yes 
22  1024 x 768  @  70 Hz,  56.5   KHz  Yes  Yes 
23  1024 x 768  @  72 Hz,  58.1   KHz  Yes  Yes 
24  1024 x 768  @  75 Hz,  60.0   KHz  Yes  Yes 
25  1024 x 768  @  75 Hz,  60.2   KHz  Yes  Yes 
26  1024 x 768  @  85 Hz,  68.7   KHz  Yes  Yes 
27  1152 x 864  @  75 Hz,  67.5   KHz  Yes  Yes 
28  1152 x 870  @  75 Hz,  68.7   KHz  Yes  Yes 
29  1280 x 720  @  50 Hz,  37.5   KHz  Yes  Yes 
30  1280 x 720  @  60 Hz,  45.0   KHz  Yes  Yes 
31  1280 x 768  @...

 
 
Fine Line Morie Pattern (Figure1)       Gray Scale Pattern (Figure2) 
 
Horizontal & Vertical Thickness Pattern (Figure 3)              R. Color Pattern (Figure 4) 
 
G. Color Pattern (Figure5)                B. Color Pattern (Figure 6) 
 
 
Full White Patter (Figure 7)                Dark Screen Pattern (Figure 8) 
 
 
ViewSonic Corporation  Confidential - Do Not Copy  VP930-3_VP930b-3 
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Black-White Pattern (Figure 9) 
 
1.5  Function Test and Alignment Procedure 
1.5.1  All Modes Reset  You should do “All Mode Reset”  (Refer to Chapter III-3. Hot  Keys for Function Controls) 
first. This action will allow you to erase all end-user’s settings and restore the factory 
defaults. 
1.5.2  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...

 (a) Select and enter “
Manual Image Adjust ” function on OSD Main Menu. 
(b) Then, select and enter “ Horizontal Size” or “Horizontal/Vertical Position ” function to 
adjust the video boundary to      be full scanned and within screen frame. 
1.5.7 White Balance  Test Signal: 1280*1024@60Hz 
Test Pattern: White and Black Pattern 
1.5.8  R, G, B, Colors Contrast  Test Signal: 1280*1024@60Hz 
Test Pattern: R, G, B, Color Intensities Pattern and 16 Gray Scale Pattern 
- Check and see if each color is...

 defaults. You should do “All Mode Reset” again. 
1.5.15  Power Off Monitor  Turn off the monitor by pressing “Power” button. 
 
2.  Firmware Upgrade Procedure 
 
When you receive the returned monitor, please ch eck whether the firmware version is the latest.   
If not, please do the following procedures  to upgrade it to the latest version. 
 
2.1 Equipment Needed 
 
- VP930/B(3) Monitor 
- Fixture for Firmware Upgrade   
- VGA Cable 
- PC (Personal Computer) 
- LPT Cable   
- Firmware Upgrade Program...

  2.2 Setup Procedure 
2.2.1 Connect P2 of Fixture with printer port of PC by LPT Cable.   
2.2.2 Connect P1 of Fixture with Monitor by VGA Cable. 
2.2.3 Connect Power Cord to Monitor. 
2.2.4 Connect PC to the additional monitor. 
 
I.    ISP Download program procedure  
1  Hardware Connect status: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  2  Down load isp program 
 
First :Open ISP software (Mstar ISP Utility). 
You will see the interface as below.
 
  
Second: select IC chip from device. 
Press the button of...

 
  
Third: Set up ISP speed.(define value is 50, if set too high, it can cause connect fail.) 
Press the Button “Config” to set up. You can change speed of ISP by changing I2C Speed, 
 we use“50”normally. 
If you use this ISP tools first time. Port Type select LPT1 if you download f/w by Print port1(LPT1)and 
Base Addr use 0x0378 instead of 0x0000.   
 
  
Fourth: Load firmware to buffer. 
Press the button “Read”(1),and press button “Read” (2),then there will be a dialog,   
you can select the F/W file...