Diagnostic device, apparatus and method
First Claim
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1. A diagnostic device comprising:
- a main power supply line onto a printhead circuit board of a printer, the power supply line to receive a power supply voltage from off the circuit board;
a comparison section to compare the power supply voltage with a threshold voltage, the comparison section detecting an overvoltage condition on the power supply line; and
an audio or visual indicator mounted to the circuit board to provide an indication to a technician of the overvoltage condition on the power supply line,wherein power continues to be supplied to components on the circuit board after the overvoltage condition is detected and wherein the indicator remains activated independent of subsequent values of the power supply voltage.
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Abstract
A diagnostic device comprises a comparison section to compare an input voltage with a threshold voltage, wherein the input voltage is a power supply voltage for a component on a circuit board; and an indicator to provide an indication of the result of the comparison by the comparison section, the indication to render the circuit board identifiable to direct inspection, wherein the supply of power to the component is independent of the result of the comparison.
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Citations
15 Claims
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1. A diagnostic device comprising:
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a main power supply line onto a printhead circuit board of a printer, the power supply line to receive a power supply voltage from off the circuit board; a comparison section to compare the power supply voltage with a threshold voltage, the comparison section detecting an overvoltage condition on the power supply line; and an audio or visual indicator mounted to the circuit board to provide an indication to a technician of the overvoltage condition on the power supply line, wherein power continues to be supplied to components on the circuit board after the overvoltage condition is detected and wherein the indicator remains activated independent of subsequent values of the power supply voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15)
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10. An apparatus comprising:
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a plurality of circuit boards, each circuit board comprising; a principle power supply line receiving an input voltage from off the circuit board; a comparison section to compare the input voltage with a threshold voltage, and detect an overvoltage condition on the power supply line; and an audio or visual indicator mounted to the circuit board to provide an indication to a technician when the comparison section detects the overvoltage condition on the power supply line, wherein the supply of power to components on the circuit board is independent of the result of the comparison and continues after provision of the indicator, wherein the apparatus is a printer and the plurality of circuit boards include a printhead board.
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11. A diagnostic method, comprising:
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detecting an overvoltage condition on a power supply voltage on a printhead board of a printer by comparing the power supply voltage with a threshold voltage, wherein the threshold voltage is greater than 50 volts; providing an alert to a user using an automated monitoring system; providing an audio or visual indication on the printhead circuit board indicating detection of the overvoltage condition, wherein the indication continues independent of subsequent voltages of the power supply voltage due to operation of a latch on the printhead circuit board; and continuing to provide the power supply voltage to components on the printhead circuit board while the indicator indicates the occurrence of the overvoltage condition wherein the power supply voltage is 38 volts to 50 volts. - View Dependent Claims (12, 13)
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Specification