Internal Dac - ViewSonic VX1935wm-3 Service Manual

5.4 Burn-in pattern
If it is a new monitor, and in factory mode, if no VGA signal input, Burn-in pattern will self generate
automatically. Burn in patterns are: full Red, Green, Blue, White and Black. You can not escape from
Burn-in pattern until plug in VGA Cable or press the power key to turn the monitor off and then turn it on.
5.5 Auto Color (Automatically calibrate chip ADC parameter by using chip

internal DAC)

If it is a new-built set and it is first time to do the "auto color", please confirm the following steps:
-Connect the VGA cable with the standard video pattern generator and display 5-mosic pattern on the monitor.
- Press "Power" to power off the monitor.
- Press" [▼] +[▲] +[ ] "simultaneously to enter factory mode.
- Press ''Menu[1]'', then press ''Auto[2]'' to execute Auto color item.
- After the "Auto Color" process finished, please press "Power" to restart monitor.
5.6 EDID (Rewrite EDID data to EEPROM)
If we need to rewrite the EEPROM data, please confirm the following steps.
1. Plug in VGA Cable; we can rewrite the EDID data to EEPROM by using "EDID Rewrite" program.
2. If the "EDID Rewrite" process finished, please pull out VGA cable and press ''2''+''▲'' at the same time.
3. Pull out AC power cable or press power key to restart.
5.7 Upload firmware to MCU via VGA Cable
5.7.1 Connect ISP board between monitor and PC as below configure
Insert to Print
Port 25pin
ViewSonic Corporation
Service
ISP Board cable
Confidential - Do Not Copy
36
LCD Monitor
D-Sub
VX1935wm-3