JVC Model 200 User Manual
Page 26
Chapter 2---System Description
HVPS_SYNC
Square wave HCT level with 50 or 33% duty cycle synchronized to
horizontal sync.
Video Processor PCB
INPUT DESCRIPTION
/HV_ENA
The HVPS enable line. A low enable the HVPS (VA_OK from VPB).
Video Amplifier PCB
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
Convergence/Deflection PCB
INPUTS DESCRIPTION
H_
PARABOLA
Horizontal parabola for use by the dynamic focus amplifier
V_
PARABOLA
Vertical parabola for use by the dynamic focus amplifier
System Controller PCB
OUTPUT DESCRIPTION
/HV_OK
The high voltage status line. Low = operational HVPS
Low Voltage Power Supply
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
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Model 200 Service Manual