May 2013
6-27
Xerox® WorkCentre® 5790 Family
GP 11
General Procedures/Information
GP 11 How to Check a Sensor
Description
Use this procedure to check the operation of all types of sensor.
NOTE: The upper circuit diagram, in
Figure 1
shows a flag sensor. Some sensors have a resis-
tor within the sensor, other sensors require a resistor on the PWB, such as R1 in
Figure 1
. The
resistor limits the current through the LED. This decreases the voltage on the sensor LED to
1.2V, typically.
NOTE: The voltages, PJ numbers, pin numbers and PWB names shown are an example only.
Go to the circuit diagram in the RAP for the correct information.
Initial Actions
WARNING
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to
GP 14
. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
Perform the steps that follow:
1.
Make sure that the sensor is installed correctly.
2.
Clean the sensor and the area around the sensor.
3.
If a flag actuator is installed, check that it has free movement.
4.
Check that the paper path is clear.
5.
If the sensor activates by a surface that reflects, check that the surface is clean. Also
make sure that there is not an obstruction between the sensor and the surface.
6.
If the sensor actuates by an encoder disc, ensure the holes or gaps in the disc are aligned
correctly with the sensor.
Sensor Action
In the upper sensor, in
Figure 1
, when light from the LED is allowed to fall on the photo-sensi-
tive transistor, the sensing line, PJA, pin2, is low. When light from the LED is blocked by the
flag, the sensing line is high.
In the lower sensor in
Figure 1
, when light from the LED is reflected by the paper onto the
photo-sensitive transistor, the sensing line, PJE, pin 2 is low. When no paper is present, no
light falls on the transistor and the sensing line is high.
Quick Sensor Check
Enter the component control code for the sensor, refer to
dC330
. Activate the sensor. If the dis-
play changes, the sensor operates correctly. If the display does not change, perform the proce-
dure.
Procedure
For the upper sensor in
Figure 1
:
•
Go to
Flag 1
. Disconnect PJA. Check for +3.3V and 0V at PJA on the harness.
•
Go to
Flag 2
. Disconnect PJC. Check the wiring and the connectors for the sensor circuit.
•
Go to
Flag 2
. Check for +3.3V and 0V at PJC on the IOT PWB.
•
If necessary, install new components or repair the wiring.
References:
•
01B
0V Distribution RAP.
•
01D
+3.3V Distribution RAP.
•
REP 1.2
Wiring Harness Repairs.
Figure 1 Circuit diagram
Summary of Contents for WorkCentre 5790 Series
Page 1: ...Xerox WorkCentre 5790 Family Service Manual 708P90298 May 2013 ...
Page 4: ...May 2013 ii Xerox WorkCentre 5790 Family Introduction ...
Page 20: ...May 2013 xviii Xerox WorkCentre 5790 Family Translation of Warnings Introduction ...
Page 22: ...May 2013 1 2 Xerox WorkCentre 5790 Family Service Call Procedures ...
Page 32: ...May 2013 1 12 Xerox WorkCentre 5790 Family SCP 7 Service Call Procedures ...
Page 53: ...May 2013 2 21 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 1 3 3V Return ...
Page 54: ...May 2013 2 22 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 2 3 3V Return ...
Page 56: ...May 2013 2 24 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 3 5V Return ...
Page 57: ...May 2013 2 25 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 4 5V Return ...
Page 59: ...May 2013 2 27 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 5 12V Return ...
Page 61: ...May 2013 2 29 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 6 24V Return ...
Page 62: ...May 2013 2 30 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 7 24V Return ...
Page 63: ...May 2013 2 31 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 8 24V Return ...
Page 95: ...May 2013 2 63 Xerox WorkCentre 5790 Family 01K Status Indicator RAPs Figure 2 Circuit diagram ...
Page 96: ...May 2013 2 64 Xerox WorkCentre 5790 Family 01K Status Indicator RAPs ...
Page 178: ...May 2013 2 146 Xerox WorkCentre 5790 Family 06 350 Status Indicator RAPs ...
Page 592: ...May 2013 2 560 Xerox WorkCentre 5790 Family 16B 16C Status Indicator RAPs ...
Page 596: ...May 2013 2 564 Xerox WorkCentre 5790 Family 19 409 Status Indicator RAPs ...
Page 698: ...May 2013 3 2 Xerox WorkCentre 5790 Family Image Quality ...
Page 736: ...May 2013 3 40 Xerox WorkCentre 5790 Family IQS 8 Image Quality ...
Page 742: ...May 2013 4 6 Xerox WorkCentre 5790 Family Repairs Adjustments ...
Page 772: ...May 2013 4 34 Xerox WorkCentre 5790 Family REP 3 4 Repairs Adjustments ...
Page 938: ...May 2013 4 200 Xerox WorkCentre 5790 Family REP 9 10 Repairs Adjustments ...
Page 994: ...May 2013 4 256 Xerox WorkCentre 5790 Family REP 11 17 110 Repairs Adjustments ...
Page 1014: ...May 2013 4 276 Xerox WorkCentre 5790 Family REP 11 15 120 Repairs Adjustments ...
Page 1166: ...May 2013 4 428 Xerox WorkCentre 5790 Family REP 14 20 Repairs Adjustments ...
Page 1168: ...May 2013 4 430 Xerox WorkCentre 5790 Family ADJ 3 1 ADJ 3 2 Repairs Adjustments ...
Page 1174: ...May 2013 4 436 Xerox WorkCentre 5790 Family ADJ 4 1 Repairs Adjustments ...
Page 1242: ...May 2013 4 504 Xerox WorkCentre 5790 Family ADJ 14 1 ADJ 14 2 Repairs Adjustments ...
Page 1386: ...May 2013 6 2 Xerox WorkCentre 5790 Family General Procedures Information ...
Page 1524: ...May 2013 6 140 Xerox WorkCentre 5790 Family Fax Tags General Procedures Information ...
Page 1526: ...May 2013 7 2 Xerox WorkCentre 5790 Family Wiring Data ...
Page 1554: ...May 2013 7 30 Xerox WorkCentre 5790 Family PJ Locations Wiring Data ...
Page 1604: ...May 2013 8 2 Xerox WorkCentre 5790 Family Accessories ...
Page 1606: ...May 2013 8 4 Xerox WorkCentre 5790 Family ACC 1 Accessories ...
Page 1610: ...XEROX EUROPE ...