Diagnostic information 2-1
7500-XXX
2. Diagnostic information
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CAUTION: Unplug the power cord from the printer or electrical outlet before you connect or disconnect
any cable or electronic board or assembly for personal safety and to prevent damage to the printer.
Disconnect any connections between the printer and PC peripherals.
CAUTION: The MFP weighs approximately 106 kg (233 lb) and requires at least four people to lift it
safely. Make sure your fingers are not under the MFP when you lift or set it down.
CAUTION: If the printer is kept on, never touch the conductive parts while it is not specifically required. The
power switch and inlet of the low voltage power supply card (LVPS card) assembly is live even while the power
supply is cut off. Never touch the live parts.
Warning: When operating the driving units using the diagnostics or other tools, be sure to keep them covered
unless otherwise specified.
Warning: When operating the driving units using the diagnostics or other tools, never touch the driving units.
When operating the driving units using diagnostics or other tools, be sure to follow the procedures
in this manual.
CAUTION: Be careful to avoid burns by safely handling hot parts.
Warning: Servicers should wear a wrist band or the like to remove static electricity from their body, grounding
their body while working. Go to “Handling ESD-sensitive parts” on page 4-1.
Using service checks
To determine the corrective action necessary to repair a printer, look for the following information:
• Verify the installation status. Go to “Confirm the installation status” on page 2-2.
• Does POR (Power-on Reset) stop? Check the POR sequence. Go to “Power-on Reset sequence” on
page 2-2.
• If you get an error code message, go to “Error code messages” on page 2-13.
— For detailed information on specific error codes and error messages, go to “Service checks” on
page 2-40.
• If you have an attendance message, refer to the User’s Guide.
• For additional operator panel information, go to “Control panel” on page 2-3.
Note: There may be printer error messages that are not contained in this service manual. Call your next level of
support for assistance.
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