Peeler Circuit (For Optional Peeler) - Citizen CL-S6621 Technical Manual

Operation of Control Parts

(8) Peeler circuit (for optional peeler)

The peeler circuit supplies +5V to an optional peeler by turning Q15 and Q14 ON.
When a peeler is installed in the printer, pin 80 (CPRTYP1) is set to "Low" level. With this
"Low" level signal, the printer recognizes the connected peeler. (The CPU judges the
connected optional device (either peeler or cutter) by detecting signals CPRTYP0 (at pin 81)
and CPRTYP1 (at pin 80). The signal CPRTYP0 for an optional cutter is now at "High" level
(not connected). )
A peel sensor detects the printed label that is peeled off by the peeler. Upon detection of the
label peeled, printing stops and the printer waits for removal of the label. When you remove the
label, the peeler sensor detects it and the printer resumes printing.
The peel sensor signal is input to pin 12 (ANI7) of U1A (CPU). From the input level of this
signal, the CPU detects the peeler condition. (Since pin 80 (CPRTYP1) is "Low" level, Q16
turns OFF and U3 (analog switch) is ON.)
L: Power Saving mode
U1A
H: Normal mode
CPU
PWRSAVE
D18
114
CPRTYP0
PCT2
81
CPRTYP1
PCT3
80
PEELSENS
(CUTTMP)
ANI7
12
Switch: ON (Fixed)
CL-S6621
R87
Q15
DTC115EM
L: When Peeler installed.
+3.3V
R88
4
PEELSENS
2 1
U3
(Analog Switch)
+5V
Q14
2SJ625
J13
+3.3V
R83
R86
C102
Q16
DTC114EM
+3.3V
D4
R92
R93
[SA, Main PCB]
2-40
Peeler Control Circuit
1
NC
2
GND
3
CPRTYP1
4
+5V
5
PEELSENS