Epson Mt532 Manual

2-10   Operation Principles Rev. A
Confidential
Platen-open detector mechanism
The platen-open detector mechanism has a microswitch
 which detects whether the platen
 is 
open (printing impossible because the thermal
 head
 is away from the platen
) or closed 
(printing possible). The microswitch
 can be OFF only when the frame, platen
 is perfectly 
closed, and at all other times is ON.
Figure 2-13  Platen-open detector circuit
Head temperature detector mechanism
The thermal head
 has a thermistor
 to...

Rev. A Operation Principles   2-11 EU-T532/T542 Technical Manual
Confidential
Black marks are detected through changes in output level from the reflective photo sensor. The 
changes in reflectivity between the pre-printed black marks and blank areas of the thermal 
paper cause the amount of light returning to the sensor to vary; then the sensor output level is 
also varied as shown in Figure 2-15. These variations are used to detect the black mark. Since the 
relationship between the black mark and the...

2-12   Operation Principles Rev. A
Confidential
Movable cutter blade mechanism
This mechanism is mounted on the frame, base
. The drive force transmission mechanism is on 
the cover, cutter, H
 side. The motor, cutter, H
, which is a DC brush motor attached the gear, 
cutter motor
. It supplies the power and is attached on the cover, cutter, H
 with screws. The 
gear, cutter worm, H 
is supported by the shaft, reduction A/C
 , and the gear, cutter drive, 
H
 is attached with push nuts to the shaft,...

Rev. A Operation Principles   2-13 EU-T532/T542 Technical Manual
Confidential
Auto cutting operation
The autocutter
 will operate when the frame platen unit is closed and a paper is loaded. (The 
frame platen unit can be closed when the movable cutter blade, full, H
 is in the standby 
position. The auto cutting operation is performed in the following steps:
1. Drive the motor, cutter, H
 in the forward rotation.
2. The microswitch
 is switched from OFF (open) to ON (closed), while the motor, cutter, H...

2-14   Operation Principles Rev. A
Confidential
Note:
If the movable cutter blade, full, H
 can not be returned to the home position because of a foreign 
matter locking the blade when powered by the motor
, rotate the knob on the gear, cutter worm, H
 
with a tool such as a ball-point pen or tweezers to move the movable cutter blade, full, H
 to the home 
position. The window on the cover, cutter, H
 can be used to check if the movable cutter blade, 
full, H
 has returned to the home position.
Figure...

Rev. A Operation Principles   2-15 EU-T532/T542 Technical Manual
Confidential
Cut Sheet Presenter Module
The cut sheet presenter module has a mechanism to carry the paper printed and cut by the 
printer module to the paper exit. Also, it has an optional cut sheet retracting function to retract a 
cut sheet when the cut sheet is not removed. 
Figure 2-21  Appearance of cut sheet presenter module
Paper Carrying Operation (With Loop)
A paper carrying operation is performed at the same time with the start of...

2-16   Operation Principles Rev. A
Confidential
 The tip of the paper sent from the printer module is in the standby state between the 
first roller, 
cut sheet presenter
 and the roller, cut sheet hold
, and the paper is continuously fed from the 
printer module. The paper pushes up the paper guide, upper 
and temporarily forms a loop. 
Figure 2-23  Cut Sheet with Loop
When the paper feed from the printer module is finished, the motor, paper feed receipt, B
 
resumes rotating. At this time, the cutter...

Rev. A Operation Principles   2-17 EU-T532/T542 Technical Manual
Confidential
Paper Carrying Operation (Without Loop)
The cut sheet can be carried without forming a loop.
Figure 2-25  Cut Sheet Operation without Loop
Note:
During paper carrying operations without a loop, do not pull out the paper.
Retract Function
 The retract function retracts the cut sheet inside the unit if the recipient does not take the cut 
sheet. The retract mechanism consists of the frame, paper route change
, the plate, route...

2-18   Operation Principles Rev. A
Confidential
 
Figure 2-26  Retract Function
Detector Mechanism
The detector mechanism consists of the cover, open sensor
, the carried paper sensor
, the 
cut sheet presence sensor
, the paper path change sensor
, and the retracted paper 
sensor 1
. 
Cover open sensor
This sensor detects whether the upper frame, cut sheet presenter unit
 is open or not.
Carried paper sensor
This sensor detects the paper presence in the paper carrying route.
Cut sheet presence sensor...

Rev. A Operation Principles   2-19 EU-T532/T542 Technical Manual
Confidential
Control Circuit Board Module
The control circuit board module controls all functions of each module and has the interface 
connectors and the power supply terminals. Each function can be set by using the DIP switches 
and the memory switches.
Figure 2-27  Appearance of the control circuit board module
DIP Switches 
The circuit board has two DIP switches (DSW 1/2). Each setting is as follows:
DIP Switch 1
*: Effective only when...