Correcting Toner Output Voltage - Kyocera Mita KM-1530 Service Manual

2AV/X
• Correction based on the total drive motor time
The toner sensor control voltage is also corrected based on the total time the drive motor (DM) has been on from
execution of maintenance item U130, so that the toner sensor output voltage is regulated properly.
Correction data
a: When maintenance item U130 is run for initial developer setting, the total drive motor time is cleared and the toner
sensor control voltage correction data becomes 0.
b: When the total drive motor time is between 300 and 500 min., the correction data is decreased according to the
increase in the total drive motor time.
c: When the total drive motor time is between 500 and 800 min., the toner sensor control voltage is corrected with a
constant value of –10.
d: When the total drive motor time is between 800 and 1200 min., the correction data is decreased according to the
increase in the total drive motor time.
e: When the total drive motor time is between 1200 and 2000 min., the toner sensor control voltage is corrected with a
constant value of –20.
f: When the total drive motor time is between 2000 and 3000 min., the correction data is decreased according to the
increase in the total drive motor time.
g: When the total drive motor time is between 3000 and 6000 min., the toner sensor control voltage is corrected with a
constant value of –30.
h: When the total drive motor time is between 6000 and 7000 min., the correction data is decreased according to the
increase in the total drive motor time.
i: When the total drive motor time exceeds 7000 min., the toner sensor control voltage is corrected with a constant
value of –40.
(5) Correcting toner sensor output voltage
The toner sensor output voltage is corrected according to the absolute humidity at power-on (the main switch turning on),
fixing temperature and accumulated drive time.
2-1
Toner sensor output voltage after correction = Toner sensor output voltage before correction – Correction data at power-
on
Correction data at power-on = A – B
If A – B ≤ 0, the correction data at power-on is 0
A: Correction data based on the absolute humidity and fixing temperature
B: Accumulated drive time from the main switch turning on (total drive motor on-time)
If the fixing temperature at the main switch turning on is 50°C/122°F or below, correction data A is determined as follows:
The absolute humidity at the last main switch turning off
3
was 50 g/m or below and the absolute humidity at the
main switch turning on was 50 g/m
Cases other than above.
If the fixing temperature at the main switch turning on is 50°C/122°F or above, the value of correction data A applied
when the main switch was last turned off is used.
2-1-14
0
X-10
X-20
X-30
X-40
300 500 800 1200
X: Toner sensor control voltage for initial developer setting (the value set in U131 in bits)
Figure 2-1-19 Correction based on the total drive motor time
Condition
3
or below.
2000 3000 6000
Correction data A
+15
+30
7000
Drive time (min.)