Sensor Rap; Generic Sensor Rap - Xerox 8830 Service Manual

Sensor RAP

Initial Actions
• This procedure can be used to check any
Sensor.
• Ensure that the Sensor is not blocked.
• Clean the Sensor surfaces before using
this procedure.
Procedure
Enter DIAGNOSTICS (General Procedures).
Enter code [xxxx] to test the Sensor (Refer to
appropriate BSD for the specific code). Block
the Sensor.
The Display toggles between [1] and [0].
Y N
There is 4-1.4 -/+0.2 VDC at J1/P1 pin 1
of the PWB.
Y N
There is 4-5 +/-0.3 VDC at J1/P1 pin
2 of the PWB.
Y N
Switch off the power. There Is
less than 2 Ohms from J1/P1
pin 2 to the machine frame.
Y N
I Replace the PWB.
Disconnect J1. There is less
than 2 Ohms from J1/P1 pin 2 to
the machine frame.
Y N
Check the wire at J1/P1 pin 1
for a short circuit.
If the wire is good, replace the
Sensor.
Replace the PWB.
Check the wire at J1/P1 pin 2 for an
open circuit.
If the wire is good, replace the Sensor.
A B

Generic Sensor RAP

A B
There is +11.5 VDC at J1 pin 1 of the PWB.
Y N
I Replace the PWB.
Check the wire at J1/P1 pin 1 for an open circuit.
If the wire is good, check the wire at J1/P1 pin 3
for an open circuit.
If the wire is good, replace the Sensor.
Block the Sensor. The Message Display indicates
HIGH.
Y N
There is +11.5 VDC at J1 pin 1 of the PWB.
Y N
Check the wire at J1/P1 pin 1 for a short circuit
to ground.
If the wire is good, replace the Sensor.
Replace the PWB.
The Sensor and its circuit appear to be operating norm-
ally, check the adjustment or alignment of the Sensor.
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8830