Electrical Circuit Description - Toshiba e-STUDIO2330C Service Manual

13.4 Electrical Circuit Description

13.4.1 Temperature/humidity detection circuit
The temperature/humidity detection circuit detects the temperature and humidity inside of the
equipment by means of the corresponding sensor so that the printing quality is not changed due to their
adverse influence where the equipment is set up, and corrects the output of the auto-toner sensor or
similar according to the result.
The temperature/humidity detection circuit is composed as shown in the figure below. It converts the
voltage of each analog signal output from the temperature/humidity sensor into a digital signal by
means of the A/D converter on the LGC board. The lower the temperature and the higher the humidity,
the higher the voltage of each analog signal output from the temperature/humidity sensor becomes.
Temperature/
humidity sensor
R
TH
(Temp)
V
RHV
(Hum)
Control signal
Signal
TEMP-1C Temperature detection signal (analog)
HMS-1C Humidity detection signal (analog)
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LGC board
+5.1VB +5.1VB
TEMP-1C
SG
HMS-1C
+
-
IC65
SG
Fig. 13-3
Function
13 - 5
IC64
IC48
ADCDI-1C
A/D
ASIC
converter
e-STUDIO2330C/2820C/2830C/3520C/3530C/4520C
13
DEVELOPER UNIT