Peel Sensor (7010R Only) - Tally Dascom 7010 Series Maintenance Manual

(10) Peel sensor (7010R only)

The peel sensor is used to detect the peeled label at the exit of the printer.
This sensor is a reflective sensor.
When a peeled label exists at the exit of the printer, the light emitted from the LED of the peel
senor is reflected by the label and reaches the phototransistor. Thus, the voltage at pin 12
(PEELSENS) of U1 (CPU) becomes "High". The CPU senses the voltage at pin 12 to detect
the presence of label at the exit.
When no label exists at the exit of the printer, the light emitted from the LED does not reach
the phototransistor. Thus, the voltage at pin 12 (PEELSENS) of U1 (CPU) becomes "Low".
CRPTYP1 signal (pin 96 (PM1) of U14 (Custom IC)) is used to detect whether the SA, Peel
Sensor is installed in the 7010R or not.
U14
Custom IC
96
PM1
U1 CPU
PEELSENS
AN17
12
+3.3V
R16
CRPTYP1
+3.3V
D9
R168
[Main PCB]
+5.0V
J502
J16
1 1
2
2
7 7
6 6
R167
[Rewinder PCB]
R169
2-31
2-2. Operation of Control Parts
Peeled label
J503
4
2
3
5
SA, Peel Sensor
[Peel Sensor]