Optical Limit Sensor

Spare Parts

Sharp GP1A05 LC Optical Limit/Home Sensor for Printers

Name: Sharp GP1A05 LC Optical Limit/Home Sensor for Printers
Brand: Sharp marking; authenticity unverified

#GP1A05

Non-contact optical home and limit sensing

Price

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This GP1A05-style optical sensor is used in compatible printers to detect a mechanical flag without physical switch contact. An infrared emitter and detector sit across the sensing slot; interrupting the path changes the output used for a home, travel-limit, carriage-reference, or mechanism-position signal. Correct operation depends on exact alignment, flag shape, voltage, wiring, output logic, mounting, and the complete sensor suffix.

Component: Optical limit/home sensor
Sensor family: GP1A05-style OPIC photointerrupter
Sensing method: Transmissive through-beam
Documented GP1A05 gap: 5mm
Documented GP1A05 slit: 0.5mm
Documented GP1A05 supply: 4.5–5.5V DC; verify exact supplied sensor
Connection: Three-pin on documented GP1A05; verify supplied variant
Cable: Depends on quoted variant
Pinout and output polarity: Require confirmation
Availability: Request Quote
Best for: Technician-confirmed optical home or limit-sensor replacement

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Detection

Non-contact optical path interruption

Application

Compatible home, limit, or mechanism-position sensing

Important

Exact suffix, pinout, voltage, mounting, and cable must match

Compatibility Requirements

Confirm printer model, full sensor number and suffix, body and slot dimensions, mounting, flag travel, and orientation.
Match connector, cable length, cable-end connector, power supply, pinout, output logic, and mainboard input.
Confirm whether the required part is sensor-only or a wired assembly.

Handling Guidance

Disconnect power, protect against electrostatic discharge, and never guess power, ground, or signal pins.
Keep ink, dust, grease, and cleaning liquid out of the optical slot; do not insert sharp objects.
Ensure the interrupting flag passes freely without striking the housing, then test homing safely.
Installation should be performed by an experienced printer technician.

Before Ordering

Confirm the exact GP1A05 suffix, condition, manufacturing source, supplier traceability, and authenticity before making manufacturer claims.
Confirm pinout, output state, cable inclusion and length, supported printers, and dead-on-arrival terms.
Do not call the sensor universal or original Sharp without documentation; keep visible manufacturer markings unchanged.

Product FAQ

What does this limit sensor do?

It detects when a compatible flag enters or leaves the optical slot so the printer can determine a home, limit, or mechanism position.

Is this a mechanical switch?

No. It is an optical photointerrupter with no lever or button that must be pressed.

Is this confirmed as an original Sharp GP1A05?

No authenticity claim should be made until markings, packaging, supplier documentation, and traceability are verified.

Does it come with a cable?

The quotation must state whether the selected unit is sensor-only or includes the photographed cable harness.

Is the sensor universal?

No. Voltage, pinout, polarity, slot, mounting, connector, and logic can differ.

Should a technician install it?

Yes. Incorrect wiring or alignment may prevent homing or damage electronics.