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Chapter 2 Operating Principles
2-2. Operation of Control Parts
CL-S700/CL-S703/CL-S700R 2-22
(3) Adjustable Sensor
The adjustable sensor consists of the transparent sensor (upper sensor) and the reflective
sensor (lower sensor), and media passes between these sensors.
The transparent sensor and reflective sensor are used to detect the label stuck on liner and the
U-shaped notch on tag. While the reflective sensor alone is used to detect the black mark on
the bottom surface of tag. Both sensors are also used to detect the media end.
The transparent sensor consists of 1 LED (this is not a sensor actually but it acts as the
transparent sensor by the combination of the phototransistor in the reflective sensor). The
reflective sensor consists of 1 LED and 1 phototransistor.
- DO NOT adjust VR3 and VR4 on the Main PCB. (Leave them at the factory
setting condition.) If it is turned, media sensor sensitivity is changed and the
media detection will not be correctly made.
Transparent sensor (used for detecting the label or U-shaped notch):
When transparent sensor is used together with the reflective sensor (media sensor menu: See
Through), pin 99 (LEDMOVE_T) of U14 (Custom IC) goes “High”, Q28 and Q9 turn ON and
the LED of the transparent sensor turns ON. The current flowing into the LED (the light amount
to be emitted) for detecting label is determined by U4 (D/A converter), U5B and Q10 under the
control of the U1 (CPU) and U14 (Custom IC).
When the liner (without label stuck on it) passes between both transparent and reflective
sensors, the light emitted from the LED of the transparent sensor reaches the phototransistor
of reflective sensor, passing through the liner.
Thus, the phototransistor conducts and the voltage corresponding to the amount of light
received is applied to the analog input (pin 6 (SENSMOVE)) of U1 (CPU) via OP amp. U20B.
Media
SA, Sensor U
[Main PCB]
SA, Sensor Bottom
2
3
4
1
J7
2
1
[Transparent Sensor]
[Reflective Sensor]
J22
UP LED A
UP LED K
DOWN
LED A
DOWN
LED K
DOWN TR C
DOWN TR E
Q9
+5V
Q28
Q8
Q27
LEDMOVE_R
LEDMOVE_T
+3.3V
Q10
C85
-
+
7
5
6
C86
R127
R126
R125
R207
VR4
VR3
R124
R122
U20B
BA2904
-
+
5
6
7
R120
C83
SENSMOVE
77
ANI1
6
U1 CPU
DTA114EM
DTA114EM
2SC56582SC5658
+3.3V
R202
R203
U4
CSB
10
DI
12
CLK
11
AO1
1
AO2
2
AO3
5
BH2227
DACIN
DACCLK
145
147
P25
P23
PFCNT2
U14
Custom IC
PFCNT1
100
99
OPRS
CS_DAC
Q21
DTC114EM
Q20
DTC114EM
2SC5658
U5B
BA2904
DO NOT
ADJUST!
DO NOT
ADJUST!
PESENSLED
Caution