Charge Roller Voltage Correction; Correction For Ambient Environment - Gestetner B130 Service Manual

DRUM CHARGE

6.15.2 CHARGE ROLLER VOLTAGE CORRECTION

Correction for Ambient Environment

ID Sensor Pattern
Charge Voltage
Laser Diode
Drum Potential
Development Bias
ID Sensor Output
Efficiency of voltage transfer from the charge roller to the drum decreases as
ambient temperature and humidity rise. Accordingly, the charge roller voltage must
be made more negative at higher temperature and humidity.
When Correction is Made
• At initial warm-up (following power-on by main switch)
• During warm-up on exit from low-power or auto-off mode, if that mode has been
in effect for at least 4 hours (Time set by SP2-995)
NOTE: Correction can be disabled with SP2-927.
B129 Series/B044 Series
CÓPIA NÃO CONTROLADA
1.5 cm
2 cm
[A]
On
Off
6-34
CÓPIA NÃO CONTROLADA
4.0 cm
+
[B]
Sub-scan Direction
–1650 V
–1400 V
–900 V
–600 V
–400 V
–140 V
Vsg (2.64 V)
Vsdp (2.44 V)
Vsp (0.35 V)
t
B046D552.WMF
SM