Ricoh V-C3 Technical Training Manual page 206

Scanner: Anti-condensation
! This is a service part. Connect this if the user needs it.
Slide 206
# Condensation on the mirrors can cause:
$ Running, smearing and image borders
$ Printing completely black or gray pages
# Fans
$ The scanner cooling fans (front, rear) pull cool air into the scanner unit.
$ The scanner exhaust fan expels hot air from the scanner unit
# Anti-condensation heater turns on:
$ When the main power switch is turned off.
$ When the operation switch is turned on.
$ When the machine enters the auto off mode.
Heater
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V-C3 Training