JVC 250 service manual System Controller PCB - Main Function

Chapter 5---Electronics

Figure 5-2Model 250 Electronics Module with PCBs (side view).

CAUTION! It is very strongly recommended that setup data be downloaded (Exported, see section 8.2 Importing/Exporting) before performing any of the following procedures. Exporting baseline source setup data to disk is an excellent precautionary measure. It will save the time of setting up new source file(s) in the case of an unexpected problem.

5.3System Controller PCB

System Controller PCB - Main Function

!Enables control for the Low Voltage Power Supply, Arc Lamp and cooling fans.

!Fault monitors the HVPS, LVPS, Arc Lamp, and fans.

!Provides IIC serial bus communication and control between PCBs.

!Controls Zoom and Focus of the Projection Lens.

!Generates Menu and Internal Patterns Overlays

!X and Y Convergence control

!Threshold and Sensitivity for shading

Model 250 Service Manual 5-3