Multiplex image forming apparatus

A multiplex image forming apparatus comprising:

• a power source for a copier;
• an application extending section capable of combining a facsimile function with said apparatus, and a power source for a multiplex configuration for driving said application extending section;
• a first and second switch located at an input section preceding said power source for a copier and said power source for a multiplex configuration;
• and
• anti-dew condensation means operable only when said second power source switch is turned on and said first power source switch is turned off.

A multiplex image forming apparatus comprising:

• a power source for a copier;
• an application extending section capable of combining a facsimile function with said apparatus, and a power source for a multiplex configuration for driving said application extending section;
• a first and a second switch located at an input section preceding said power source for a copier and said power source for a multiplex configuration;
• and
• power supply path interrupting means for interrupting part of power supply paths only when said second power switch is turned on and said first power source switch is turned off.

A multiplex image forming apparatus comprising:

• a power source for a copier;
• an application extending section capable of combining a facsimile function with said apparatus, and a power source for a multiplex configuration for driving said application extending section;
• a cooling fan included in said power source of a copier;
• a heat generating member whose heat generating state changes;
• temperature detecting means for detecting a temperature of said heat generating member;
• and
• fan rotation speed control means for changing a rotation speed of said cooling fan in matching relation to the temperature detected by said temperature detecting means.