Sony UP-890CE Service Manual page 41

(4) Print timing pulse generation
FGI (Iclo3 - @))
or
ee eae Se N-l N 1 2
FG2 (1C103 - @6)) a ee ae ee
INTV
ic (anaes
(i
2445 usec
af
(5) Transfer from frame memory to line memory
When a COPY pulse is input from the CPU, IC103 sets COPYING low and enters
the print operation state.
To ensure printing, the one-line data selected out
of frame memory
must be transferred to the one-line memory
incorporated in
1C103.
The frame memory consists of two field memories that are classified into odd
and even fields.
IC103 reads necessary print data from the frame memory in
the order corresponding to the print range and direction specified for mode
setting by the CPU and transfers the data to the one-line memory in IC103 after
variable power processing.
Data is transferred for every INTV pulse during low period.
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