JVC 340 SC - Manual (Page 81)

Chapter 2—Functional Description
Model 330, 340SC and 370SC Service Manual 2-69
SYSCLK 4.05MHz clock signal
IICCLK Clock signal for the IIC data bus.
+SERCLK Serial data transfer clock.
-SERCLK Serial data transfer clock.
+SERDATA Serial data transfer.
-SERDATA Serial data transfer.
Vertical Deflection Board
I/O Description
IICDATA Data line for transferring the following data (I = input, O =
output), the input data are associated with an interrupt
pulse.
I SLOAD
Input Description
/IICINT Interrupt used to tell the SCB that the VDB has data to
report.
Output Description
IICCLK Clock signal for the IIC data bus.
+SERCLK Serial data transfer clock.
-SERCLK Serial data transfer clock.
+SERDATA Serial data transfer. Used to transfer the following command
data:
VH+, VH- to control the vertical amplitude (height)
VCENTRED, VCENTGRN, VCENTBLU to control
vertical
centering of the red, green and blue rasters respectively;
TRAPCORR to control keystone correction;
LRPNCORR for left and right pincushion correction;
TBPNCORR for top and bottom pincushion correction;
HLINCORR for horizontal linearity correction.
-SERDATA Serial data transfer.
RXCORR Horizontal correction output from DAC with 140 ohm Zout.
RYCORR Vertical correction output from DAC with 140 ohm Zout.
GXCORR Similar to RXCORR.
GYCORR Similar to RYCORR.
BXCORR Similar to RXCORR
BYCORR Similar to RYCORR.