Temperature/Humidity Detection Circuit; General Description; Construction - Toshiba e-STUDIO 200L Service Manual

11.5 Temperature/Humidity Detection Circuit

11.5.1

General description

To prevent a deterioration of printing quality by the variation of the temperature and humidity where the
equipment is installed, the temperature/humidity sensor detects the temperature and humidity of the
outside air taken into the equipment. Based on the result of the detection, this circuit corrects each out-
put of main charger bias, developer bias, transfer bias and separation bias, output of the auto-toner
sensor and output of the laser.
11.5.2

Construction

The configuration of the temperature/humidity detection circuit is shown below. The analog-signal volt-
age output from the temperature/humidity sensor is converted by the A/D converter in the Engine-CPU
on the LGC board. The higher the temperature is, the higher the output voltage of this sensor becomes,
and the higher the humidity is, the higher the output voltage of this sensor becomes.
HMS-1A
PC0/AN0
Engine-
CPU
TEMP-1A
PC1/AN1
IC22
June 2004 © TOSHIBA TEC
+
-
IC2
LGC board
Fig.11-5
e-STUDIO200L/202L/230/232/280/282 DRUM RELATED SECTION
11 - 7
( HUM )
R
TH
( TEMP )
HUMI-THS
11