Diagnostic information 2-1
7500-432, -632, and -832
2. Diagnostic information
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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.
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 2-11.
– For detailed information on specific error codes and error messages, go to “Service checks” on
page 2-36.
• If you have an attendance message, refer to the User’s Guide.
• For additional operator panel information, go to “Understanding the printer operator 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.
CAUTION—SHOCK HAZARD:
Remove the power cord from the electrical outlet and then from the printer before connecting or
disconnecting any cable, assembly, or electronic board. This is a precaution for personal safety
and to prevent damage to the printer. Disconnect any connections between the printer and PCs/
peripherals.
CAUTION—POTENTIAL INJURY:
The printer weighs approximately 75 kg (165 lbs) and requires two or more trained personnel to lift
it safely. Make sure your fingers are not under the printer when you lift or set the printer down.
CAUTION—SHOCK HAZARD:
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.
CAUTION—HOT SURFACE:
The inside of the printer might be hot. To reduce the risk of injury from a hot component, allow the
surface to cool before touching.
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