Toner Supply With Abnormal Sensors - Ricoh G147 Service Manual

the machine checks Vt. If toner concentration is judged to be at the standard level, then the
toner near end/end condition is cancelled and K (toner supply coefficient) is reset. If toner
concentration has not reached the standard level, the toner supply motor rotates
continuously until it does (maximum motor on time is 16 seconds) and then it will switch off.

6.7.8 TONER SUPPLY WITH ABNORMAL SENSORS

The TD sensor is checked every copy. If the readings from the TD sensor become abnormal
during a copy job, the machine holds the GAIN factor constant (GAIN is normally calculated
from TD sensor readings) to allow toner supply to vary with only pixel count for the rest of
the copy job. Then at the end of the copy job, an SC code is generated and the machine
must be repaired.
The ID sensor is checked every 10 copies. If readings become abnormal, an SC code is
generated and the machine must be repaired. If this happens during a copy job, Vref is not
changed, the copy job is allowed to finish, and then the SC code is generated.
If spare parts are not available, the technician can use SP2-208-1 (Toner Supply Mode) to
temporarily put the machine in image pixel count mode. (See Section 5 Service Tables.)
SM 6-33 G147