ViewSonic P90F Service Manual download pdf (Page 25)

ADJUSTMENT

The adjustment data with tolerance is only for setting to the optimum performance.

SERVICE ADJUSTMENT LOCATIONS

Main Board (parts side view)---PWB-0404

F1--------Variable Resistor on top of FBT for Static Focus adjust.

F2--------Variable Resistor on middle of FBT for Dynamic Focus adjust.

G2--------Variable resistor on bottom of FBT for Grid 2 set up.

R167-----Full white brightness adjust.

R176-----High voltage setting

R454-----Raster center

R827-----B+ = 81V setting

R817A---Set power supply working frequency

Degauss--------To degauss function

Enter key-------------Enter OSD key

Down key-------------Decrease adjust value or counterclockwise select Icon

Up key-----------------Increase adjust value or clockwise select Icon

Auto –size key--------Auto sizing

9-1 B+ (81V) output voltage adjustment

a). Apply PC signal with any pattern to the monitor.

b). Connect AC input and power on the monitor.

c). Brightness at center, contrast at maximum.

d). Adjust R827 for the voltage at heat-sink of D816 to 81V

R454

F1 F2 G2

R176 R167

FBT

Power

Transformer

B-0404

R827

R817A

ViewSonic Corporation

Confidential – Do Not Copy

P90f-1

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 69 70

No comments

ViewSonic P90F Service Manual Page 25