Damp Heater Control Circuit (Asd/Aud/Cnd/Sad Models) - Toshiba e-STUDIO 160 Service Manual

7.8 Damp Heater Control Circuit (ASD/AUD/CND/SAD models)

When the machine is stopped for hours, the scanner damp heater heats the inside of the scanner to
prevent dew condensation on the original glass inner side surface, mirror, lens, and shading correction
plate.
The scanner damp heater operates on AC power input from the entrance to generate heat. A scanner
thermostat is connected to the AC power supply line in series with the scanner damp heater. The scanner
thermostat detects the temperature inside the scanner unit and supplies or shuts off the AC power to the
scanner damp heater according to the detected temperature.
The scanner thermostat turns ON at 22.4°C or under, and turns OFF at 30.4°C or above. The AC power
from the entrance is always delivered while this machine is connected to the commercial power outlet,
regardless of the ON/OFF state of the main switch.
LVPS
Entrance
1
2
FG
December 2002 TOSHIBA TEC
F1
AC/I/L HL
1
Noise
filter
AC/I/N HN
3
Scanner unit
FUS PWA
F1/F2
1 1
2 3
7 - 17
Scanner dump heater
Connector
1
2
Scanner thermostat
Connector
3
1
08-08-01
e-STUDIO160/200/250 SCANNER