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Operation of Control Parts
CL-S6621 2-24
R70
R66
U20B
BA2904
-
+
5
6
7
C96
R76
R73
U20A
-
+
3
2
1
C97
BA2904
R65
R72
Q9
DTC114EM
Q10
DTC114EM
R71
R67
Q6
2SC5658
+5V
Media
Transparent Sensor
Reflective Sensor
3
2
3
4
1
4
5
J9
2
1
[SA TRA Sen PCB]
[SA Ref Sen PCB]
U7
D/A Converter
CSB
DI
12
11
CK
10
PSNSLED
SCLK
DACCS
SDATA
From
U1A CPU
BH2227
Transparent sensor
output sensing terminal
J8
+3.3V
REFMON
TRAMON
ANI0
5
ANI1
6
U1A
CPU
Reflective sensor output
sensing terminal
R75
R74
R14
R13
TSNSCTL1
TSNSCTL0
AO1
AO2
AO3
AO4
(White)
2
B4_34
B4_33
U14
FPGA
(White)
R69
R68
Q7
DTC114EM
Q8
DTC114EM
[SA, Main PCB]
(2) Transparent sensor and reflective sensor
The transparent sensor (“SA TRA Sen PCB”) is used to detect the label stuck on liner and the
U-shaped notch on tag. On the other hand, the reflective sensor (“SA Ref Sen PCB”) is used to
detect the black mark printed on the bottom surface of tag. Both sensors are also used to
detect the media end.
The upper side transparent sensor is the phototransistor, and the lower side reflective sensor
consists of 2 LEDs and 1 phototransistor. Media passes between these sensors.
Transparent sensor (used for detecting the label or U-shaped notch):
When the liner without label stuck on it passes between both sensors, the light emitted from
the LEDs reaches the transparent sensor, passing through the liner. Thus, the transparent
sensor (phototransistor) conducts and the voltage corresponding to the amount of light is
applied to pin 5 (TRAMON) of U1A (CPU).
Meanwhile, when the liner with the label stuck on it passes between both sensors, the light is
blocked by the label and the transparent sensor (phototransistor) turns OFF. Thus, pin 5
(TRAMON) of U1A (CPU) goes "Low" level. From the difference in these levels at pin 5
(TRAMON) of U1A (CPU), U1A (CPU) can detect the leading edge (arrival) of the label on the
liner.
When media runs out, the light directly falls on the transparent sensor and media end is
detected. In this case, pin 5 of U1A (CPU) will go "High" level.