Printing Mechanism - Samsung SRP-275 Service Manual

SRP-275
Carriage head ass'y
C
A
Lever-change color
B
Frame-ribbon
MOVING RIBBON UPWARD
HEAD CARRIAGE SHIFT(BLACK-->RED)
E
Frame-ribbon
Lever-change color
Solenoid
D
MOVING RIBBON DOWNWARD
SOLENOID ON(RED-->BLACK)

8-2 Printing mechanism

When the specified print head drive pulse is input to the drive coil, the iron core is magnetized, and the
actuating plate is pulled in the direction of arrow A. This action pushed the wire toward the Platen. When the
wire strikes the ink ribbon and paper against the Platen(*1), a single dot is printed.
When the energizing of the drive coil is completed, the wire and actuating plate are returned to the standby
position by the wire return spring and actuating plate spring.
NOTES
(*1) The "Platen" is the portion of the base paper feed being struck by the wires during printing.
Paper roll
Ink ribbon
Wire
Plate
Spring
B
Platen
A Wire guide
Iron core
Driver coil
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Rev. 2.00