Relative Humidity Sensor Failure Rap - Xerox WorkCentre 5687 Series Service Manual

Figure 2 Circuit diagram
Status Indicator RAPs
09-360, 09-361, 09-362, 09-363, 09-365

09-365 Relative Humidity Sensor Failure RAP

09-365 Average humidity reading is out of limits.
Also use this RAP if the relative humidity sensor is suspected of working incorrectly. A faulty
relative humidity sensor can cause image quality problems.
Initial Actions
Switch off the machine, then switch on the machine, GP 14.
Procedure
Enter dC330 code 09-365, relative humidity sensor, Q09-365. Press start. Observe the dis-
played state of Q09-365. Figure 1. Open the bypass tray, gently blow on the relative humidity
sensor PWB. Observe again the displayed state of Q09-365. The
changed.
Y N
Go to Flag 1. Check for +5V at P/J7 pin 3 on the IOT PWB. +5V is present.
Y N
Go to the 01E +5V Distribution RAP.
Go to Flag 1. Check for +5V at P/J46 pin 1. +5V is present.
Y N
Check the wiring between P/J7 on the IOT PWB and P/J46, GP 7. Repair wiring as
necessary, REP 1.2.
Install a new relative humidity sensor / ambient temperature sensor, (32-38 ppm) PL 9.22
Item 4, (45-87 ppm) PL 9.20 Item 4.
If the fault continues, perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is
installed, PL 1.10 Item 2.
If possible, check the relative humidity of the external environment using a hygrometer. Com-
pare with a reading from the sensor Q09-365. Refer to the NOTE above Table 1. If a hygrome-
ter is not available refer to Table 1 for the approximate expected humidity value. Compare the
expected values with Q09-365. If the value of Q09-365 is very different from the expected
reading.
Install a new relative humidity sensor / ambient temperature sensor, (32-38 ppm) PL 9.22 Item
4, (45-87 ppm) PL 9.20 Item 4.
If the fault continues, perform OF7 IOT PWB Diagnostics RAP before a new IOT PWB is
installed, PL 1.10 Item 2.
If the fault is intermittent, perform the steps that follow:
• Check the wiring, GP 7. Repair if necessary, REP 1.2.
• Make sure that the P/Js are correctly and securely connected.
August 2007
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displayed state has
WorkCentre 5687 Family