Canon imagePRESS C7000VP Series Trouble Shooting Information page 28

 E020-0xB0
Error Description: Lower limit error in signal value of toner density sensor
* While printing, COPIER > Display > DENS > SGLL-Y/M/C/K is 64 or less for Y and 48 or less
for M/C/K for 5 prints continuously (T/D ratio is too high).
Cause of occurrence (Highly possible):
Cause of occurrence (Low possible):
 E020-0xB1
Error Description: Upper limit error in signal value of toner density sensor
* While printing, COPIER > Display > DENS > SGLL-Y/M/C/K is 192 or more for Y and 126 or
more for M/C/K for 5 prints continuously (T/D ratio is too low).
Cause of occurrence (Highly possible):
Cause of occurrence (Low possible):
Abnormal toner supply [*3]
Short circuit of harness for ATR sensor
Occurrence of Tiger stripe
Disconnected connector of toner density sensor (or
poor contact)
Faulty sub hopper (no toner)
Damaged toner density sensor
Trouble Shooting Information for C7000VP series
Page 28
Rev. 2.0
2010/09/17