JVC 330 Service Manual page 36

Chapter 2—Functional Descriptions
/Hx112
/CORSTRT
/FRAMEST
INTI
/VSYNCSC
/FIELD1
/MAPST
I/O
IICDATA
Inputs
SGSYNC
HCSYNC
VSYNC
Outputs
DCRSTR
VIDBLNK
/VSYNCSC
Inputs
/HVFLBCK
Outputs
/VFBST
/HSYNCRE Selected HSYNC signal. (TP 14)
Outputs
/PCST
2-24
112 times the horizontal frequency for convergence and Z axis
correction address generator clocking. (TP 20)
Signal used to start the convergence and overlay address
generators during each horizontal sweep. (TP 4)
Indicates the beginning of a frame. Used in the SCB for
counting vertical frequency. (TP 5)
Indicates when input source signal is interlaced. (TP 2)
Regenerated vertical sync signal, pulse shaped to 3 horizontal
lines in width. (TP 7)
Low during field #1 of an interlaced input source. (TP 8)
Pulse signal to signal the overlay and correction address
generators to reset for a new frame. (TP 12)
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.
Video Processor Board
Description
Stripped Green Sync is Sync-on-Green composite sync signal.
(TP 10)
Horizontal/Composite Sync. (TP 9)
Vertical Sync used only for separate H and V sync. (TP 21)
Description
Pulse for DC restore timed to correspond to ST, BP, or TL.
(TP 1)
Signal for image blanking from adjustment counters. (TP 6)
Vertical sync signal pulse for ILA bias sync. (TP 7)
Horizontal Deflection Board
Description
Signal representing horizontal flyback from the HDB. Used for
determining H phase. (TP 17)
Description
Signal to start the vertical retrace. (TP 11)
Vertical Deflection Board
Description
Signal to time the start of T/B pincushion and linearity
correction. (TP 31)
Description
Model 330. 340SC, and 370SC Service Manual