Citizen CL-E700 Series Technical Manual

Chapter 2 Operating Principles
2-2.
Operation of Control Parts
2-29 CL-E700 series
(5) Ribbon motor temperature sensor
The ribbon motor temperature sensor is used to detect the temperature of the “SA Ribbon
Motor F” on the ribbon take-up side. This sensor is a thermistor bonded to the “SA Ribbon
Motor F”.
Since the resistance of the thermistor changes according to the temperature change, the
voltage at pin 99 (TMPRIB) of the CPU (U1A) changes accordingly. The CPU senses the
voltage at pin 99 (TMPRIB) to detect the temperature of the “SA Ribbon Motor F”.
Printing operation when the “SA Ribbon Motor F” temperature rises:
When the temperature of the “SA Ribbon Motor F” reaches 85
C (185F), the “SA Ribbon
Motor F” stops after printing the current label.
In this case, the LED on the operation panel blinks in red and the LCD displays “Error RBMotor
Hot”, and the printer goes off-line. When the temperature of the “SA Ribbon Motor F” falls
below 80
C (176F), the LED and LCD returns to normal display, and printing automatically
resumes.
Abnormally high temperature detection:
To protect the “SA Ribbon Motor F” from being damaged, an abnormally high temperature
detection circuit is provided. If the temperature of the “SA Ribbon Motor F” exceeds a set
temperature limit, the LED on the operation panel blinks in red and the LCD displays “Error
System Fail”, and the printer goes off-line. To recover from the error status, turn OFF the
printer once and then turn it ON.
A reference voltage, i.e., an allowable temperature limit, is applied to pin 2 of the comparator
(U8A), while the sensor output voltage (TMPRIB) from the ribbon motor temperature sensor is
applied to pin 3.
80C
(176
F)
85C
(185
F)
Normal speed
(Stop)
Normal speed
Normal speed
(Stops)
24
J4
M
Thermistor
R75
C103
R76
AN5
99
[SA Ribbon Motor F]
TMPRIB
+3.3V
2
J603
1
[SA Ribbon
Control PCB]
13
J601
RBMTH
CPU
13
J304
3-6
J301
24
TMP_RIB
[SA Relay PCB]
U1A
14-16 14-16
U8A
-
+
3
2
1
+3.3V
[SA Main PCB]
TEMP ERROR Detection
BA2903SFVM
R34
+3.3V
R32
C49
R33
N3
K1
33_N3
21_K1
FPGA
nTMPERR
nTMPENB
Error: Low
U5
nTMPERR
TMPRIB
3-6
(L: Disables ribbon motor drive.)
Ribbon Motor
Temperature Sensor

Citizen CL-E700 Series Specifications

General

Brand	Citizen
Model	CL-E700 Series
Category	Printer
Language	English