Samsung 275C - SRP Two-color Dot-matrix Printer Servisní příručka stáhnout pdf (Strana 131)

Rev. 2.00

- 131 -

SRP-275

MOVING RIBBON DOWNWARD

SOLENOID ON(RED-->BLACK)

MOVING RIBBON UPWARD

HEAD CARRIAGE SHIFT(BLACK-->RED)

Carriage head ass'y

Solenoid

Frame-ribbon

Lever-change color

Frame-ribbon

Lever-change color

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.

Plate

Spring

Wire

Wire guide

Iron core

Driver coil

Ink ribbon

Platen

Paper roll

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Samsung 275C - SRP Two-color Dot-matrix Printer Servisní příručka Strana 131