iDP3240 SERVICE MANUAL
2
1.3 Sensor mechanism
1.3.1 Paper sensor
The paper sensor is located immediately before
the thermal head to detect whether recording
paper is present or not. Applying electrical
power to the thermal head while recording paper
is not inserted could result in damage to the head
or reduce the service life of it. The paper sensor
is provided to help prevent this, as well as to
detect whether recording paper is inserted or not
in the case of auto loading.
Platen roller
Paper sensor
Recording paper
Thermal head
1.2 Mechanism for attaching and detaching the platen roller
The platen roller, which is a part of the mechanism for feeding recording paper, is removable
with this printer. The platen roller, which has the platen gear, platen bushings and platen holder
attached, comprises a platen roller unit. When this unit is placed in the U-formed bearings of the
chassis, the platen gear engages the motor gear. The wire springs, with one end anchored to the
chassis, press against the platen bushings to keep the roller in contact with the thermal head. The
platen roller unit can be attached or removed by hooking or unhooking the movable ends of the
wire springs to or from the hooks on the chassis.
Wire spring
Motor gear
Platen gear
Platen roller (Platen roller unit)
Platen holder
Platen bushing
Platen roller
Chassis U-formed bearing
Chassis hook
Summary of Contents for iDP3240
Page 1: ...LINE THERMAL PRINTER MODEL iDP3240 Rev 1 0 First created Feb 10th 2000 Service Manual...
Page 2: ...i REVISION Rev No Date Content Rev 1 0 Feb 10th 2000 First created...
Page 16: ...iDP3240 SERVICE MANUAL 13 3 2 Exploded View 2 5 4 3 71 31 30 29 28 45 44 43 41 52 51 50 49 48...
Page 23: ...iDP3240 SERVICE MANUAL 20 4 3 2 Control PCB Assy Reverse side of the board...
Page 24: ...iDP3240 SERVICE MANUAL 21 4 3 3 Control PCB Assy Top side of the board Parallel Interface...
Page 25: ...iDP3240 SERVICE MANUAL 22 4 3 4 Control PCB Assy Reverse side of the board...
Page 33: ...iDP3240 SERVICE MANUAL 30 6 OUTLINE DRAWING FEED ERROR POWER 9 37 201 119 5 186 123...