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01/02

2-18

8825/8830 Printer

Generic Sensor RAP

Status Indicator RAPs

Generic Sensor RAP

Initial Actions

NOTE: This procedure can be used to check any sensor. Due to the generic format of this RAP

there will be no specific ADJ, PL or Diagnostic codes identified.

• Ensure that the Sensor is not blocked.

• Clean the Sensor surfaces before using this procedure.

Procedure

( Figure 1): Enter DIAGNOSTICS (General Procedures). Enter code [xxxx to test the Sensor

(Refer to appropriate BSD for the specific code). Block and unblock the Sensor. The Display

toggles between [1] and [0].

Block the sensor. There is +5

± 0.3 VDC at J1 pin 3 of the sensor.

Check the wire at J1/P1 pin 3 for an open circuit.

If the wire is good, replace the main PWB.

There is +1.4

± 0.2 VDC at J1/P1 pin 1 of the sensor.

Check the wire at J1/P1 pin 1 for an open circuit.

If the wire is good, replace the Sensor before replacing the main PWB.

Unblock the sensor. There is approximately 0 VDC at J1 pin 3 of the sensor.

Replace the sensor.

Replace the main PWB.

The Sensor and its circuit appear to be operating normally, check the adjustment or alignment

of the Sensor.

Figure 1 Sensor (Generic)

Xerox 8825 Service Manual

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