E–10
Principles of Operation
DATA PROCESSING UNIT (DPU)
PAPER FEED
68010
CONTROLLER
EPROM
From
Host
Computer
To
Hammer
REAL–TIME PROCESSING UNIT
MICROPROCESSOR
512 KB
Driver
To
Mech.
Driver
Serial to Host,
Mech. Driver, and
Control Panel
PARALLEL
PORT
DOT
PLUCKER
DRAM
1 MB
BUS
INTERFACE
FIRE
TIMER IC
HARDWARE
CONTROL
HARDWARE
STATUS
REGISTER
REGISTER
COMM.
PORT
8032
PROCESSOR
EPROM
16 KB
EPROM
32 KB
SRAM
2 KB
64180
PROCESSOR
BUS
INTERFACE
CONTROL
REGISTER
NVRAM
2 KB
(RTPU)
(PFC)
SHARED
SHARED
ASIC
Serial from
Host Computer
Figure E–5. Hardware Implementation of the CCB
Summary of Contents for P4280
Page 1: ...P4280 Line Matrix Printer Maintenance Manual R ...
Page 2: ......
Page 3: ...P4280 Line Matrix Printer Maintenance Manual R P N 155064 001 Rev B ...
Page 236: ...A 22 Configuring the Printer ...
Page 246: ...C 2 Torque Table ...
Page 263: ...D 17 Wire Data Cable No Part No Description W7 150649 001 Cable Assembly AC Ground PIN 1 ...
Page 296: ...8 Index Notes ...
Page 297: ......