GE Giraffe, Service Manual

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Chapter 1: Functional Description
System Functions
1-18 Service Manual
1.3.11 Observation Lights
The system incorporates dimmable observation lights in the heater housing. (Refer to Figure 1-12 .) Mains
power is converted to low voltage AC by a dimmable transformer located in the electronics enclosure. The
on/off control and light intensity is controlled by a potentiometer mounted to the front panel. On/off control
is achieved by a relay on the Power Board. The mains power to the observation light is fused on the Power
Board.
1.3.12 Procedure Light (Optional on Panda Warmer)
Mains power is converted to DC power by a dedicated 12V DC power supply mounted in the heater housing.
(Refer to
Figure 1-13 .) The light intensity ramps up progressively when the light is turned on. The slow turn
on is controlled by circuitry on the Alarm Light Board. The on-off switch on the light assembly provides an
enable signal to the slow turn on circuitry on the Alarm Light Board. Mains power to the procedure light
includes fuses on the Power Board.
FIGURE 1-12. Observation Lights