Xerox PHASER 7500, Service Manual

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Phaser 7500 Printer Service Manual 3-3
Error Messages and Codes
Servicing Instructions
The service checklist below is an overview of the path a service technician should
take when servicing the printer and printer optional equipment.
Step 1: Identify the Problem
1. Verify the reported problem does exist.
2. Check for any error codes and write them down.
3. Print normal customer prints and service test prints.
4. Make note of any print-quality problems in the test prints.
5. Make note of any mechanical or electrical abnormalities present.
6. Make note of any unusual noise or smell coming from the printer.
7. View the System Error and Paper Jam Error on the Fault History.
8. Verify the AC input power supply is within proper specifications by
measuring the voltage at the electric outlet while the printer is running.
Step 2: Inspect and Clean the Printer
1. Turn the printer power Off.
2. Disconnect the AC power cord from the wall outlet.
3. Verify the power cord is free from damage or short circuit and is
connected properly.
4. Remove the Imaging Units and protect them from light.
5. Remove the Transfer Unit.
6. Inspect the printer interior and remove any debris such as paper clips,
staples, pieces of paper, dust, or loose toner.
7. Do not use solvents or chemical cleaners to clean the printer interior.
8. Do not use any type of oil or lubricant on printer parts.
9. Use only an approved toner vacuum.
10.Clean all rubber rollers with a lint-free cloth, dampened slightly with
cold water and mild detergent.
11.Inspect the interior of the printer for damaged wires, loose connections,
toner leakage, and damaged or obviously worn parts.
12.If the Print Cartridges appear obviously damaged, replace with new
ones.
Step 3: Find the Cause of the Problem
1. Use the Error Messages and Codes and troubleshooting procedures to
find the cause of the problem.
2. Use Service Diagnostics to check the printer and optional components.
3. Use the Wiring Diagrams and Plug/Jack Locator to locate test points.
4. Take voltage readings as instructed in the appropriate troubleshooting
procedure.
Step 4: Correct the Problem
1. Use the Parts List to locate a part number.
2. Use the FRU Disassembly procedures to replace the part.
Step 5: Final Checkout
1. Test the printer to be sure you have corrected the initial problem and
there are no additional problems present.