Olivetti DR N17, Руководство по обслуживанию

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687200Q Service Manual 7-5
7
7.1 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 question is “No,” perform
the action following the “N.”
In addition, keep the following points in mind while performing any RAP:
1 If possible, have a spare EP Cartridge on hand. Some RAPs use this component as a
troubleshooting tool.
2 RAPs use the following notation when referring to printer connections:
•
P/JXX – indicates Plug/Jack 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 on P/J XX (except for connectors soldered directly to the board).
CAUTION Use an Electronic Discharge Kit (ESD) when handling sensitive electrical
components.
When you take a voltage reading at a P/J location, the notation “P/J A–B and P/J X–Y” indicates
that you should place the red probe (+) of the voltmeter on pin B of P/J A, and place the black
probe (-) of the voltmeter on pin Y of P/J X. 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 voltage 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 Unless otherwise instructed by a RAP, take all voltage readings with the EP Cartridge and Paper
Trays installed, and with the Top Cover and Exit Door closed.
5 Voltage values stated in RAPs are approximate. Actual voltages may differ slightly. A small
difference in voltage is acceptable.
6 Refer to the appropriate Repair Procedures if you must remove or replace a component.
7 The term
replacement means the named part or parts could be the cause of the initial problem.
Replace the entire assembly that a RAP directs you to replace.
Image Quality Problems
Use letter-size paper (11”) or A4 paper when troubleshooting an image quality problem.
Use the Test Print option, 5.1.4.13 Print Menu (System Controller Test Pattern), to determine whether an
image quality problem is being caused by the printer or by the PC. The printer generates the Test Print.
If the Test Print is normal but the regular prints have an image quality problem, the problem may be with
the PC.