B Tray 3 And Tray 4 False Low Paper Level Rap - Xerox WorkCentre 5687 Series Service Manual

Figure 3 Tray 2 circuit diagram
WorkCentre 5687 Family

07B Tray 3 and Tray 4 False Low Paper Level RAP

Use this RAP when the copier displays tray 3 or tray 4 is low on paper when the tray is full. The
tray is low on paper message will appear when the tray capacity is at 10%.
The machine measurers the time taken for the tray to elevate after being closed, to determine
the amount of paper remaining in tray 3 or tray 4. This measurement only occurs if the tray has
been open for a minimum of 30 seconds. If the tray is closed within 30 seconds the time-out of
the last known paper level is used and no new timing is calculated.
NOTE: A low paper condition will be declared if the stack is below approximately 190 sheets.
Procedure
Pull out the relevant tray and allow it to move fully down. Close the tray. The tray moves up.
Y N
Go to 07-355 Tray 3 Elevator Lift Up Failure RAP.
Go to 07-360 Tray 4 Elevator Lift Up Failure RAP.
Pull out the tray and load a ream of paper or 500 sheets. Wait for 30 seconds before closing
the tray. The message tray is low on paper has changed.
Y N
Tray 3: Go to Flag 1. Check low paper sensor, Q07-343. Tray 4: Go to Flag 2. Check low
paper sensor, Q07-344. Refer to:
• GP 11 How to Check a Sensor.
NOTE: In this check place a piece of paper between the sensor. The check is diffi-
cult due to the problem in moving the timing disc.
• Figure 1.
• P/J390, HCF control PWB.
• 01E +5V Distribution RAP.
• 01B 0V Distribution RAP.
Install new components as necessary.
• Tray 3 elevator motor, PL 7.20 Item 1.
• Tray 4 elevator motor, PL 7.20 Item 1.
• HCF control PWB, PL 7.20 Item 2.
The low paper sensor appears to be working correctly. If the customer is only adding small
amounts of paper at a time then the message (Tray is low on paper) will be displayed. If the
tray is filled with 190 sheets or more, the message is cancelled.
August 2007
2-173
Status Indicator RAPs
07A, 07B