Xerox DocuPrint N24, Руководство по обслуживанию, Страница: 357 / 1032

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DocuPrint N24, N32 and N40 Service Manual 7-3 Repair Analysis Procedures (RAP)
Using RAPs
In each of the following Repair Analysis Procedures (RAPs) you are instructed to perform certain actions
and make observations. The instruction is followed by a statement. If your response to the statement is
yes, perform the action following the “Y”. If your response to the statement is no, perform the action
following the “N.”
In addition, keep the following points in mind while performing any RAP:
1
RAPs use the following notation when referring to printer connections:
•
P/J XX – indicates Plug/Jack XX is connected to a component.
•
CN XX – indicates connector XX is connected to a component.
•
P XX – refers to the plug of P/J XX (except for connectors soldered directly to the board).
•
J XX – refers to the jack of P/J XX (except for connectors soldered directly to the board).
2
When you take a voltage reading at a P/J location, the notation “P/J3-5 and P/J 2-6” indicates
that you should place the red probe (+) of the voltmeter on pin 5 of P/J 3, and place the black
probe (-) of the voltmeter on pin 6 of P/J 2. In most cases the second P/J pin in the notation is a
Return (RTN), Frame Ground (FG), or Signal Ground (SG).
3
When a RAP tells you to take a reading between P/J X and P/J Y, with no pin numbers given,
refer to the Wiring and Connection Diagrams in Section 6 and take readings on ALL pins.
4
Voltage values stated in RAPs are approximate. Actual voltages you get may differ slightly. A
small difference in voltage is acceptable.
5
Refer to the appropriate Repair Procedures if you must remove, replace or reinstall a component.
6
The term
replace
means the named part or parts could be the cause of the initial problem.
Example: the phrase “replace the Fuser Assembly” means to remove the current Fuser
Assembly and replace with a new Fuser Assembly.
7
Throughout these procedures, the term “vertical” refers to the process direction (the direction
paper travels through the printer); the term “horizontal” refers to the scanning direction (the
direction the laser beam scans across the page).
Image Quality Problems
Use letter-size paper or A4 paper when troubleshooting an image quality problem. Use the System
Controller Test Prints to determine whether an image quality problem is being caused by the printer or by
the host. If the test prints are normal, but in the Online mode the prints have an image quality problem,
the problem may be in the System Controller PWB, Serial or Network Option PWB, Interface Cable, or
with the Host Computer.
ESD
The following symbol will be displayed when the components in an area are susceptible to electrostatic
discharge. Use all appropriate ESD procedures.
CAUTION
These components are susceptible
to electrostatic discharge. Observe
all ESD procedures to avoid
damage.