2–39
Principles of Operation
FRONT PANEL
PRINTER SETUP
PRINTER ENABLE
HOST
CONNECTION
INPUT DATA
INPUT DATA
BUFFER
(IN DYNAMIC RAM)
ASCII DATA (DCU)
BUILD DOT IMAGE BUFFER (DIB)
FROM LOOK UP TABLES IN FONT
PUT INTO DYNAMIC RAM (DCU)
SELF–TEST
SELECT FROM
FRONT PANEL
SYNCHRONIZE THE TIMING TO
THE CODE WHEEL (MPU)
SOFTWARE (MCU)
DEMAND HAMMER LOAD (MCU)
DATA SHIFTED OUT TO HAMMER DRIVER (DCU)
FIRE HAMMERS
ON NEXT MPU
ALL DOTS IN ROW PRINTED ?
N
Y
MOVE
THROUGH DMA CONTROLLER
68B44
CONTROLLED BY SOFTWARE
EXECUTED BY HARDWARE
CONTROLLED BY SOFTWARE
EXECUTED BY HARDWARE
SOFTWARE TIMERS
SOFTWARE DECISION
PAPER
SOFTWARE
(DCU)
(DCU)
(DCU)
(MCU)
(MCU/MECH
DRIVER)
Figure 2–29. Operation Flow Diagram
Содержание P9012
Страница 1: ...P N 132305 001 Rev E P9012 Multifunction Line Printer...
Страница 49: ...2 31 Principles of Operation Power Supply PCBAs 1 3 SHORT OPEN Figure 2 21 Power Supply PCBA...
Страница 53: ...2 35 Principles of Operation PAPER FEED MOTOR TRACTORS PAPER TRANSPORT Figure 2 26 Paper Feed Components...
Страница 58: ...2 40 Principles of Operation...
Страница 84: ...4 18 Troubleshooting...
Страница 107: ...5 23 Alignments and Adjustments 1 Screw 2 MPU Arm 1 2 Figure 5 9 Magnetic Pickup Phasing Adjustment...
Страница 118: ...5 34 Alignments and Adjustments...
Страница 203: ...6 85 Replacement Procedures This page intentionally left blank...
Страница 214: ...6 96 Replacement Procedures...
Страница 217: ...A 3 Power Paper Stacker Maintenance Printer Rear Power Paper Stacker Figure A 1 Power Paper Stacker...
Страница 236: ...A 22 Power Paper Stacker Maintenance...
Страница 246: ...D 2 Torque Table...
Страница 254: ...Index 6...
Страница 255: ......
Страница 256: ...132305 001 Rev E...