JVC 250 service manual Electrical Section, Incoming Power Circuit, Power Supplies

Chapter 2---System Description

Figure 2-1Overview of the Model 250 projector showing major components

2.2Electrical Section

The electrical section consists of the Incoming Power Circuit, and the Power Supplies and the Igniter Assembly. The following paragraphs give a list of major components and a brief description of those components. For a more detailed description of a component, refer to the chapter and section dedicated to that particular component.

Incoming Power Circuit

!Power Cord - The AC power comes in through the Power Cord to the AC Circuit Breaker.

!AC Circuit Breaker - The Circuit Breaker connects and disconnects the projector from electrical energy and protects the projector from over- voltage conditions.

!AC Line Filter - The AC SF Series Line Filter reduces radiation generated by a regulated power supply from returning to the AC power source.

Power Supplies

!Low Voltage Power Supply (LVPS) - The LVPS supplies standby voltages and the main system voltages to the projector.

!Arc Lamp Power Supply (ALPS) - The ALPS supplies power to the Igniter Assembly while the Arc Lamp is lighting. After the Arc Lamp has lit, ALPS provides the steady state power to the Arc Lamp. The ALPS also monitors the condition of the Arc Lamp and sends a feedback signal to the System Controller PCB if there is a problem.

!High Voltage Power Supply (HVPS) - The HVPS provides the Anode, Focus (G3), Black Level (G2), Blanking (G1), and Dynamic Focus voltages for the CRT.

2-2 Model 250 Service Manual