JVC 330 Service Manual page 63

Inputs
VPARAB
HPARAB
/SWEEPOK
Inputs
RBEAM
GBEAM
BBEAM
/RVIDOK
/GVIDOK
/BVIDOK
Outputs Description
BLANKING Pulse signal output that is a buffered replica of the VIDBLANK input
/BENABLE Logical connection of video amp, sweep, and power health
/RENABLE Identical to /BENABLE.
/GENABLE Identical to /BENABLE.
RVOUT Red video output. 0V to 1V (TP1).
GVOUT Green video output. 0V to 1V (TP2).
BVOUT Blue video output. 0V to 1V (TP3).
CLAMP Pulse signal output that is a buffered replica of the SCRSTR input
Inputs Description
RVIDCH1 Red video input to channel 1.
RVIDCH2 Red video input to channel 2.
GVIDCH1 Green video with optional composite sync signal input to channel 1.
GVIDCH2 Green video with optional composite sync signal input to channel 2.
Model 330, 340SC and 370SC Service Manual
Vertical Deflection Board
Description
A periodic, positive-going, parabolic waveform with the
vertical scan frequency, used for dynamic focus.
A periodic, positive-going, waveform with the horizontal scan
frequency, used for dynamic focus.
A TTL DC level signal indicating that, when low, indicates all
flybacks are occurring at or above a minimum frequency.
Video Amplifier Board
Description
Voltage signal proportional to cathode current averaged over
several horizontal lines, in the red CRT. Voltage level is
+1mV/uA.
Similar to RBEAM.
Similar to RBEAM.
Open collector signal indicating the health of the red +100V
cathode supply.
Similar to /RVIDOK.
Similar to /RVIDOK.
Video Amplifier Board
from the SCB. Indicates the commanded blanking interval during
the scan.
indications. TTL level output.
from the SCB. Indicates the commanded timing and duration of
the DC restore.
External Video
Chapter 2—Functional Description
2-51