Ricoh MP 7503SP Field Service Manual page 1274

7. Troubleshooting
SC495-00
SC496-00
1272
D Toner recycling unit error
Encoder pulse does not change for 3 s after the drum motor switched on.
• Waste toner transport has stopped due to drum motor overload
• Toner end sensor defective, disconnected
• Inspect the area around the drum motor
• Remove any obstacles that could interfere with motor operation
• Inspect the transport coils and check for clogging
• Remove the development unit and inspect the toner end sensor harness
and connector
• Replace toner end sensor
D Toner collection bottle error
The toner collection bottle set switch remained off when the front door is
closed.
• No toner collection bottle is in the machine
• Toner collection bottle set switch harness loose, broken, defective
• Toner collection bottle set switch defective
• Confirm that there is a used toner collection bottle in the machine
• Inspect the harness of the toner collection bottle set switch
• Replace toner bottle collection set switch