Hammer Driver Block Diagram - Printronix p300 Maintenance Manual

ONE SHOT
CK
HRS
NHCK
HMC
COM
NHBC
HAMMER
DRIVER (H/D)
+9.5V
+5V
REGULATOR
+36
RET
HAMMER
OUTPUT
+36V
DISABLE
HMC
CIRCUITS
HRS
FAIL
SAFE
O/S
HRS
NHCK
HRS
OPTO–
ISOLATORS
COM
NHSC
2–22
HC1
Q
NHRS
NHCK
–A–
P300
5HL
HOD
D
OE
CK Q
HCK
HCK
HRS
COM
NHSC
–B–
P600
Figure 2–12. Hammer Driver Block Diagram
t
DARLINGTON DRIVERS
DATA LATCHES
SHIFT REGISTER
CK
DARLINGTON DRIVERS
DATA LATCHES
SHIFT REGISTER
CK
P300/P600 Principles of Operation
t
HC44
(44)
+28V
(44)
(44)
t t
+36V
(66)
t t
(66)
(66)