2–17
Principles of Operation
HAMMER
DRIVER
C
O
N
T
R
O
L
P
A
N
E
L
J1
J11
DRAM
256K X 16
NVRAM
2K x 8
MISC.
CONTROL
SIGNALS
S/P – P/S
SHIFT REGISTER
FRONT
PANEL
I/F
LOGIC
ADDRESSABLE
LATCHES
ADDRESS
OUTPUT
OE
DATA BUS
STATUS
REGISTER
P
R
I
N
T
H
N
O
H
NSWITCH
+5V
GND
ADDRESS BUS
(23)
(16)
PDATA
NPFAULT
REGSEL
NENABLE
NSWITCH
NPCLK
NPLOAD
COM
HSCK
+5VDC
+12VDC
–12VDC
GND
E
A
D
S
E
L
E
C
T
A0, A1
(8)
PARALLEL AND SERIAL I/O CONTROL
MCUFLT
MCU
MECH
MCU
I/O
HAMMER DATA CONTROL
MCUREC
B
U
F
C
L
R
N
D
C
D
S
R
O
S
T
W
R
NLOAD
DRIVER
DOT
PLUCKER
MEMORY
CONTRLR
NLOAD
Figure 2–13. Data Control Unit (DCU) Block Diagram (2 of 2)
Summary of Contents for P9012
Page 1: ...P N 132305 001 Rev E P9012 Multifunction Line Printer...
Page 49: ...2 31 Principles of Operation Power Supply PCBAs 1 3 SHORT OPEN Figure 2 21 Power Supply PCBA...
Page 58: ...2 40 Principles of Operation...
Page 84: ...4 18 Troubleshooting...
Page 118: ...5 34 Alignments and Adjustments...
Page 203: ...6 85 Replacement Procedures This page intentionally left blank...
Page 214: ...6 96 Replacement Procedures...
Page 236: ...A 22 Power Paper Stacker Maintenance...
Page 246: ...D 2 Torque Table...
Page 254: ...Index 6...
Page 255: ......
Page 256: ...132305 001 Rev E...