Service Call Procedures - Xerox Phaser 7760 Service Manual

Service Call Procedures

Service Strategy
The service strategy for this printer is to perform any applicable actions before attempting to
repair any problems. Some problems will be corrected by this strategy without the need to diag-
nose them. The Repair Analysis Procedures (RAPs) will be used for any remaining problems.
Problems that occur in the Basic Printer mode will be repaired before problems that occur
when using the accessories.
Image Quality problems should be repaired after all other problems are repaired.
Service Call Procedures
The Service Call Procedures are a guide for performing any service on this machine. The pro-
cedures are designed to be used with the Service Manual. These procedures are to be used
for every service call. It is recommended that you start at the appropriate troubleshooting pro-
cedure and proceed from there. When servicing the printer, always follow the safety measures
detailed in the Service Safety Summary.
Step 1: Identify the Problem
1. Verify the problem reported by the customer.
2. Check for any error codes and write them down.
3. If the printer is capable of printing, print normal customer prints and service test prints to:
• Make note of any print-quality problems in the test prints.
• Make note of any mechanical or electrical abnormalities present.
• Make note of any unusual noise or smell coming from the printer while printing.
4. Print a Usage Profile, if the printer is able to print and/or view the fault history under the
Service Tools menu.
5. 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 and disconnect the AC power cord from the wall outlet.
2. Verify the power cord is free from damage and is connected properly.
3. Remove the Imaging Units and protect them from light.
4. Clean and inspect the printer interior and remove any foreign objects, dust or loose toner.
NOTE: Use only a Toner Type II Vacuum.
Do not use solvents or chemical cleaners.
Do not use any type of oil or lubricant on printer parts.
Do not use compressed air.
5. Clean all rubber rollers with a lint-free cloth, dampered slightly with cold water and mild
detergent.
6. Inspect the interior of the printer for damaged wires, loose connectors, toner leakage, and
damaged or obviously worn parts.
Revised
Phaser 7760 Color Laser Printer
Part 3: Find the Cause of the Problem
1. Use the Error Messages and Chain Links Troubleshooting procedures to find the cause of
the problem if an error code is reported.
2. Use the Service Diagnostics to check printer parts.
3. Use the Wiring Diagrams and Plug/Jack Locator to locate test points and take voltage
readings at various test points 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 Repairs procedures to replace the part.
Step 5: Final Check
1. Test the printer to be sure you have corrected the initial problem and there are no addi-
tional problems present.
2. Perform RIP procedures.
January 2010
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Service Call Procedures
Service Call Procedures