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2. SYSTEM MODE EO13-33003
2.1 Self-diagnostic Test
2-12
(7) Sensor 2 Check
The status of the Print Head Thermistor, Ambient Temperature Thermistor, Black Mark Sensor, and
Feed Gap Sensor are printed.
SENSOR2 [H]23°C [A]22°C [R(U)]4.2V [R(L)]4.0V [T]2.5V
Sensor/Thermistor Print status description
Print head thermistor A thermistor built in the print head detects a print head
temperature. The current supplied to the print head (= print tone)
is controlled on the basis of this temperature.
When the print head overheats (80°C or over), the printer
displays “EXCESS HEAT TEMP” message and stops printing to
protect the print head.
Ambient temperature thermistor Temperature inside the printer (around the media) is detected.
The current supplied to the print head (= print tone) is controlled
on the basis of this temperature. When the temperature of 61°C
is detected, an error message, “EXCESS HEAT TEMP”, is
displayed and the printer stops.
Upper black mark sensor/
Lower black mark sensor
Real time voltage detected by the upper black mark sensor or
lower black mark sensor is displayed/printed.
Feed gap sensor Real time voltage detected by the feed gap sensor is
displayed/printed.
(8) Paper End Level Check
PE LV. [R(U)]1.2V [R(L)]1.3V [T]4.3V
Feed gap sensor status:
0.0 to 5.0V
Upper black mark sensor status:
0.0 to 5.0V
Print head thermistor status:
0°C to 86°C
Ambient temperature thermistor status:
0°C to 86°C
If it is undetectable, “--°C “ is printed.
No paper level of transmissive sensor:
0.0 to 5.0 V
No paper level of upper reflective sensor:
0.0 to 5.0 V
Paper End Level
Lower black mark sensor status:
0.0 to 5.0V
No paper level of lower reflective sensor:
0.0 to 5.0 V