JVC 330 Service Manual page 62

Chapter 2—Functional Descriptions
RTHRESH
GTHRESH
BTHRESH
+SERCLK
-SERCLK
+SERDATA
-SERDATA
Outputs
/IICINT
I/O
IICDATA
Inputs
VIDBLANK
DCRSTR
Outputs
SGSYNC
HSYNC
VSYNC
2-50
Threshold (Z-axis offset) correction information for red. Real
time data at 0V to 1V.
Similar to RTHRESH.
Similar to RTHRESH.
Serial data transfer clock (+). Unidirectional, differential clock
line from SCB to other circuit boards. Used for
synchronous control of serial communication over
SERDATA data lines.
Serial data transfer clock (-).
Serial data transfer. Unidirectional, differential, synchronous
serial data communication line. Used for transferring data
from SCB to other circuit boards. Uses SERCLK and IIC
for control of receiver.
Serial data transfer.
System Controller Board
Description
Interrupt used to tell the SCB that the VPB has data to report.
Description
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
Description
Along with RONSCRN, GONSCRN, BONSCRN, and
VONSCRN from the SCB, and DCRSTR, determines
whether there is full brightness, black, gray-scale, or
external video presented at a given point on the screen.
Along with RONSCRN, GONSCRN, BONSCRN,
VONSCRN, from the SCB, and VIDBLANK, determines
whether there is full brightness, black, gray-scale, or
external video presented at a given point on the screen.
Description
Stripped Green Sync. The composite sync signal stripped from
the green channel
(if it exists) (TP13).
Horizontal Sync. This can be either just the horizontal sync, in
which case there will be a separate vertical sync, or
HSYNC can be a composite sync. (TP14)
Vertical Sync. This cannot be a composite sync signal. (TP15)
Model 330. 340SC, and 370SC Service Manual