JVC 250 service manual Updates, Acronyms Used

Chapter 1---Introduction

When performing procedures that call for the projector’s power to be on, always wear high voltage gloves (ANSI/ASTM 10,000 volt rated) when working around the CRTs, Arc Lamp or power supplies. Wear safety goggles (rated X5) when working near the light path from the Arc Lamp or at all times around the projection lens.

1.2Updates

Hughes-JVC will periodically provide bulletins and /or manual supplements to ensure the continued accuracy of this service manual.

1.3Acronyms Used

ALPS	Arc Lamp Power Supply
C	Chrominance
CDB	Convergence/Deflection Board
CH	Channel
CPU	Central Processing Unit
CRT	Cathode Ray Tube
EMI	Electromagnetic Interference
EPROM	Erasable Programmable Read-Only Memory
FPGA	Field Programmable Gate Array
F to V	Frequency to Voltage
G1	CRT Grid 1
G2	CRT Grid 2
HVDB	Horizontal/Vertical Deflection Board
Hz	Hertz
HSYNC	Horizontal Sync
HVDB	Horizontal/Vertical Deflection Board
HVPS	High Voltage Power Supply
IIC	Inter-Integrated Circuit
ILA®	Image Light Amplifier
I/O	Input/Output
I/R	Infrared
kHz	Kilohertz
LED	Light Emitting Diode
LVPS	Low Voltage Power Supply
NTSC	National Television Standards Committee
PAL	Phase Alternating Line
PCB	Printed Circuit Board
PLL	Phase Lock Loop
PLUGE	Picture Line-Up Generating Equipment
RAM	Random Access Memory
RGB	Red, Green and Blue
RGBHV	Red, Green, Blue, Horizontal, Vertical
ROM	Read Only Memory
RTG	Raster Timing Generator
SCB	System Controller Board

1-2 Model 250 Service Manual