Mechanism Outline; Mechanism And Operation Principles; Drive Force Transmission Assembly; Sensor Assembly - Sharp UP-600 Service Manual

2-2 Mechanism Outline

The mechanism of this printer can be divided
into 9 blocks.

• Drive force transmission assembly

• Sensor assembly

• Print head assembly
• Paper feed assembly
• Ribbon cassette assembly
• Paper take-up assembly
• Frame
• Motor assembly
For information on peripheral circuitry
connected to this printer, please refer to the
respective documentation.
2-3 Mechanism and Operation
Principles
This section explains the construction and
operation of 8 out of the 10 blocks listed above
(excluding the frame and motor assembly).
2-3-1 Drive Force Transmission Assembly
The drive force of the motor assembly is
transmitted to the various parts as follows. Print
head via bevel gear, Paper feed, via PF gear,
Ribbon cassette via worm wheel, Paper take-up
assembly via winder pulley.
Idling gear 2
Idling gear 1
Worm wheel
Bevel gear 1
Bevel gear 2
Motor gear Reduction
Motor assembly
Reduction gear 1
Winder
PF gear
pulley
Reduction
gear 2 gear 4
Reduction
gear 3
2-3-2 Sensor Assembly
The sensor assembly is comprised of 3 sensors;
the dot pulse sensor (DP), home position sensor
(HP) and reset pulse sensor (RP).
(1) Dot pulse sensor/home position sensor
Main PCB assembly
Home position sensor (HP)
Dot pulse sensor (DP)
(2) Reset pulse sensor
Reset pulse sensor (RP)
Main PCB assembly
4
Motor assembly
Head assembly
Carriage