Video Processor Pcb; Video Amplifier Pcb; System Controller Pcb; Raster Timing Generator Pcb - Hughes JVC 220 Service Manual

INPUT DESCRIPTION
HVPS_SYNC Square wave HCT level with 50 or 33% duty cycle synchronized to
horizontal sync.
INPUT DESCRIPTION
/HV_ENA The HVPS enable line. A low enable the HVPS (VA_OK from VPB).
OUTPUTS DESCRIPTION
G1_SUPPLY DC supply about -150 V for driving the G1 of CRTs
G2_SUPPLY DC supply about 1.3 KV for driving the G2 of CRTs
ARC_GND Return (ground) line for the CRT anodes
INPUTS DESCRIPTION
H_ Horizontal parabola for use by the dynamic focus amplifier
PARABOLA
V_ Vertical parabola for use by the dynamic focus amplifier
PARABOLA
OUTPUT DESCRIPTION
/HV_OK The high voltage status line. Low = operational HVPS
INPUTS DESCRIPTION
+ 15V + 15 V for use by the HVPS
+ 80V + 80 V for use by the HVPS
- 15V - 15V for use by the HVPS
2-12

RASTER TIMING GENERATOR PCB

VIDEO PROCESSOR PCB

VIDEO AMPLIFIER PCB

CONVERGENCE/DEFLECTION PCB

SYSTEM CONTROLLER PCB

LOW VOLTAGE POWER SUPPLY
Chapter 2---System Description
Model 220 Service Manual