摘要:
When a unit containing a fuse is mounted, in response to detection of a potential indicating that the fuse has not been blown by a detection circuit, a current for blowing the fuse is supplied from a blowing circuit to the mounted unit containing the fuse, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and after current supply, respectively. When a unit containing a non-blown component instead of a fuse is mounted, a current is supplied from the blowing circuit to the mounted unit containing the non-blown component, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and during current supply, respectively, or potentials detected by the detection circuit before current supply and after current supply, respectively.
摘要:
A label paper indexing control method for a label printer is provided that in one embodiment includes conveying label paper having labels affixed with a specific gap there between to a continuous liner through a path passed a printing position of a print head, detecting a reference position of the label paper at a detection position upstream from the print head, determining the position of a downstream label end of a label on the path as a first distance from the detection position based on when the reference position is detected, updating the first distance each time the label paper is conveyed, executing a power shutdown operation that writes the first distance to memory and turns the power off when a command instructing turning the power off is asserted, and reading the first distance from memory when the power turns on without the label paper having been replaced.
摘要:
A constant-temperature type crystal oscillator includes: a surface-mount crystal unit, in which a crystal element is housed in a case main body to hermetically encapsulate the crystal element with a metal cover, and which includes a crystal terminal serving as a mounting terminal that is electrically connected to at least the crystal element on an outer bottom face of the case main body; a thermistor that detects an operational temperature of the surface-mount crystal unit; and a circuit substrate, on which elements forming an oscillator circuit and elements forming a temperature control circuit along with the thermistor are installed. The thermistor includes a first and second terminal electrode and a temperature detecting electrode that is electrically independent of the first and second terminal electrode. The temperature detecting electrode is electrically connected to the crystal terminal of the surface-mount crystal unit through a circuit pattern formed on the circuit substrate.
摘要:
A constant-temperature type crystal oscillator includes: a crystal unit that is installed on one principal surface of a circuit substrate, and chip resistors, which function as heating elements, and which are installed on the other principal surface of the circuit substrate so as to face a principal surface of the crystal unit, the chip resistors heating up the crystal unit to keep an operational temperature of the crystal unit constant. A heating metal film facing the principal surface of the crystal unit is provided on the one principal surface of the circuit substrate. A heat conducting material is interposed between the principal surface of the crystal unit and the heating metal film to perform thermal coupling therebetween. The heating metal film is thermally coupled to electrode terminals of the chip resistors via a plurality of electrode through holes.
摘要:
The roll paper printer of the subject invention has a control to detect failure of a paper detector in accordance with a method for detecting such failure. The printer 1 is constructed so that the paper transportation path is open when the cover 3 to the roll paper compartment 10 is open and includes a paper detector 40 and a control unit 30 to determine if the paper detector 40 is faulty. A failure warning is provided by a warning indicator 7(S7, 8) to indicate failure of the paper detector 40 when the cover 3 has been open continuously for at least a first set time (S6) and the output state of the paper detector 40 has not changed even once to a no-paper state within the first set time. Preferably, the printing operation of the printer 1 is disabled upon determining that the paper detector 40 is faulty to permit replacement of the paper detector. Problems attributable to paper detector failure, such as soiling the platen with ink can thus be prevented.
摘要:
A constant temperature crystal oscillator includes on a circuit substrate: a surface-mount crystal resonator which is provided with two crystal terminals as mount terminals and a dummy terminal on the bottom surface, and has a metal cover; an oscillation circuit element which forms an oscillation circuit together with the crystal resonator; and a temperature control element which keeps a constant operation temperature of the crystal resonator, in which the temperature control element includes at least a heating chip resistor, a power transistor for supplying electric power to the chip resistor, and a temperature sensitive resistor for detecting the operation temperature of the crystal resonator, wherein a dummy terminal on the substrate side of the circuit substrate for connection to the dummy terminal of the crystal resonator is connected to a resistor terminal on the substrate side to which the temperature sensitive resistor is connected through a conductive path.