JVC 340 SC - Manual (Page 82)

Chapter 2—Functional Descriptions
2-70 Model 330. 340SC, and 370SC Service Manual
Horizontal Deflection Board
I/O Description
IICDATA Data line for transferring the following data (I = input, O = output).
O Flyback Switch Select
O Flyback Switch Pulse
I Front/Rear indication
I Floor/Ceiling Indication
O Serial Data Load
Input Description
/IICINT Interrupt that tells the SCB that the HDB has data to report.
Horizontal Deflection Board
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:
HPHASE to control the horizontal phase, HLINR to control the
horizontal linearity, HCENTBLU, HCENTGRN, HCENTRED
to control the horizontal centering of the blue, green and red
rasters respectively, and WIDTH to control the horizontal width
of all three rasters and for control of geometric correction.
-SERDATA Serial data transfer
System Power Supply
Inputs Description
+5.0V Power for digital components
+5V STB Power to CPU and peripherals
+15V Power for analog components
-15V Power for analog components
/LAMPLIT Indicates normal operating voltage being supplied to Arc Lamp
Output Description
/LVPSNBL Low Voltage Power Supply Enable
/FANENBL Signal to enable 24V Standby Power
/ALENBL Enables Arc Lamp Power
Dot Matrix Status Display
Outputs Description
LEDDO-6 Data
/LEDLT Lamp test
/LEDWR Write