![background image](http://html1.mh-extra.com/html/viewsonic/va503b-1/va503b-1_service-manual_1020926038.webp)
2.5 Connect P3 to the Signal Generator (eg.Chroma2326) for verifying it after the
operation being completed.
2.6 Connect PC to the additional monitor.
3 Firmware Upgrade Procedure
Step 1. Let VA503/VA703/VA903 set to be connected with AC cable and VGA cable.
Step 2.Execute the MSstar ISP tool.
Step 3. Click “Config” button . Select the Port Type: LPT1 and the Base Addr : 0x378
on “Communication Setting” flame, and then the Speed: 47 on “E2PROM Device
Setting” flame
P2
:
to LPT Cable
JP1
:
to Power Adapter
P1
:
to VGA Cable
P3
:
to Signal Generator
ViewSonic Corporation
VA503b-1_ VA503m-1
35
Confidential - Do Not Copy
Summary of Contents for VA503b-1
Page 25: ...Circuit Diagram ViewSonic Corporation VA503b 1_ VA503m 1 22 Confidential Do Not Copy...
Page 44: ...ViewSonic Corporation VA503b 1_ VA503m 1 41 Confidential Do Not Copy...
Page 51: ...Picture 17 ViewSonic Corporation VA503b 1_ VA503m 1 48 Confidential Do Not Copy...
Page 63: ...ViewSonic Corporation VA503b 1_ VA503m 1 60 VA503m Confidential Do Not Copy...
Page 78: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 75 11 PCB Layout Diagram...
Page 79: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 76...
Page 81: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 78 POWER PCB VIEW...
Page 82: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 79...