Dot Selection Block Diagram - Printronix p300 Maintenance Manual

RESYNC/
TURNAROUND
DOT ROW
COUNTER
INCOMING
DATA
PRINTER BUFFER
8 X 132, (198)
PRT
MEMORY
COUNTER
CLK
CONTROL
SYNC
LOGIC
SYNC
COUNTER
P300/P600 Principles of Operation
RC1–RC4
(SELECT ROW)
(SELECT CHAR.)
SDB1–SDB8
SRCLK
SRCLK
CHARACTER
COLUMN
COUNT
PROM
Figure 2–5. Dot Selection Block Diagram
CHARACTER
PROMS
PLOT MODE DATA
RAM MEMORY
NESR
COUNTER
MODUL0 132, 198
DOT COLUMN
DC1–DC4
COUNT PROM
CC1–CC3
SHIFT CLOCK
LOGIC
(SELECT
CHARACTER
1 OF 3)
8
1–8
+
1–4
=12
DOT
SELECT
LOGIC
(SELECT
DOT)
COM
(SERIAL)
HAMMER
BANK
SHIFT
REGISTER
NHSC
TO DRIVERS/
2–11
LATCHES
P300–44
P600–66
PARALLEL
OUTPUT
COILS