General Notes On Using Repair Analysis Procedures; Table 1-25 Rap Table Example - Xerox DOCUPRINT N4525 Service Quick Reference Manual

Table 1-25 RAP Table Example

Step Actions and Questions
2 NO PAPER SENSOR TEST
1. Enter Diagnostics.
2. From the Main Menu, select Comp Output
Test / HCF Unit / Tray 3 Paper Sen.
3. Slide Tray 3 out of the printer.
4. Press [4] to start, [0] to stop.
5. Manually actuate and deactuate Tray 3
No Paper Sensor.
Does the Control Panel display "With
Paper" and "Without Paper" when
the actuator is toggled to its limits?
General Notes on Using Repair Analysis
Procedures
1.
Unless indicated otherwise, the instruction "switch ON printer main power"
means for you to switch ON printer power and let the printer proceed through
power-on diagnostics and warm-up until it is on-line and ready to print.
2.
Conventions used to represent connectors:
P/J XX means a Plug and its corresponding Jack are connected.


PXX means a Plug is disconnected. (Unless this plug is soldered to a board).


JXX means a Jack is disconnected. (Unless this jack is soldered to a board).


3.
When you are instructed to take a voltage reading between "P/J A–B and P/J
X–Y", place the red probe (+) of your meter on pin B of P/J A, and place the
black probe (–) of your meter on pin Y of P/J X.
4.
When you are instructed to take voltage readings between "P/J X and P/J Y"
(without specified pin numbers), check all voltage carrying pins. Refer to the
Wiring Diagrams for signals and pin numbers.
5.
When you are instructed to take a voltage reading, the black probe (–) is
generally connected to a pin that is either RTN (Return) or SG (Signal Ground).
You can substitute any RTN pin or test point in the printer, and you can use
frame ground (frame ground) in place of any SG pin or test point.
6.
Unless a Repair Analysis Procedure instructs you otherwise; before measuring
voltages make sure the printer is switched ON, the Xerographic Cartridge and
the paper trays are in place, and all of the interlock switches are actuated.
7. All voltage values given in the Repair Analysis Procedures are approximate
values. Actual measured voltages may vary more than 25% from the values
stated in the Repair Analysis Procedures. The main purpose of most voltage
readings taken in the Repair Analysis Procedures is to determine whether or
not a component is receiving the correct voltage value from the power supply
and if gating (a voltage drop) occurs during component actuation. Gating
signals may be nothing more than a pulse, resulting in a momentary drop in
voltage that may be difficult or impossible to read on the average multi-meter.
8.
Repair Analysis Procedures may instruct you to remove or replace a
component. Refer to the Key FRU Removal and Replacement Procedures
section for information on how to remove and reinstall a component.
9.
When a Repair Analysis Procedure instructs you to replace a non-spared
component, and that component is part of a larger assembly, you should
replace the entire assembly.
1-32 DocuPrint N4525 Network Laser Printer - Service Guide
Yes
Go to step 3
No
Replace the No
Paper Sensor
Assembly