3.8 OTHERS
(1) Anti-condensation Heater
An anti-condensation heater [A] is installed on the left side of the optical
base plate. It turns on when the main switch is off, to prevent moisture from
forming on the optics.
(2) Fans
1. Optics Cooling Fan
Two optics cooling fans [B] are located at the left side of the optics cavity.
These fans blow air into the optics cavity to prevent the exposure lamp
and optics cavity from overheating during copy cycles. This fan rotates
only when the exposure lamp is on.
2. Scanner Board Cooling Fan
The scanner board cooling fan [C] blows air into the optics cavity to keep
the scanner IPU board and the SBU from overheating. This fan rotates
always when the main switch is on.
3. Optics Exhaust Fan
The optics exhaust fan [D] is located at the right side of the optics cavity
under the lens housing cover. This fan blows air out to keep the scanner
motor, the scanner motor drive board, the lamp regulator, and IDU board
from overheating. This fan rotates only when the exposure lamp is on.
[C]
[D]
[A]
[B]
SCANNER UNIT
A166/A187/A189 2-36 SM
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