JVC 370 SC, 330, 340 SC service manual Raster Timing Generator Inputs Description

	Chapter 2—Functional Description
IICDATA	IIC data line. Bi-directional serial line for synchronous data transfer
	between SCB and other circuit boards. See detailed description for
	list of signals transferred and data direction.
	Raster Timing Generator
Inputs	Description
/VFBST	Signal to control the vertical oscillator frequency and retrace timing
/HSYNCR	Regenerated horizontal sync signal
Outputs	Description
/HVFLBCK	Pulse signal representing horizontal flyback used to determine phase of
	image
	Vertical Deflection Board
Inputs	Description
GEOCORR	Periodic signal for L/R keystone and L/R pincushion correction
FLRCLING	TTL level indicating whether or not raster is inverted
Outputs	Description
VERTDR	Pulse output from vertical oscillator.
HLINR	DC voltage controlling horizontal edge linearity correction
HFDBK	DC voltage proportional to the H power supply output voltage
WIDTH	DC voltage indicating commanded width.
TBKEYCOR	DC voltage representing commanded top and bottom keystone correction
HSENSRED	DC voltage, high when flyback pulse for red yoke is present at normal
	frequencies.
HSENSBLU	Similar to HSENSRED.
HSENSGRN	Similar to HSENSRED.
	Main Horizontal Deflection Coils
Inputs	Description
/INLCK	Return from series daisy-chain for sensing yoke connectors installed.
Outputs	Description
+INLCK	Negative voltage supply from the horizontal power supply to the daisy-
	chained yoke connector interlock.
+BHORYK	Positive supply from the centering current source to the blue horizontal
	main deflection coil.
-BHORYK	Return from the blue horizontal main deflection coil to the horizontal
	deflection power transistor.
+GHORYK	Similar to +BHORYK.
-GHORYK	Similar to -BHORYK.
+RHORYK	Similar to +BHORYK.
-RHORYK	Similar to -BHORYK.

Model 330, 340SC and 370SC Service Manual 2-31