4535 611 98931 iE33 Service Manual Page 77
CSIP Level 1 Theory of Operation: Physical Structure
AVIO-RIP. The +12 VSB and +5 VSB are present when AC power is applied. (The iE33 sys-
tem does not need to be fully powered up. It needs only to be plugged into the wall socket
with the circuit breaker on.)
• Supplies +12 Vdc to video monitor and +3.3 Vdc to touch screen LCD and +5 Vdc to the
touch screen Backlight Inverter.
• Operates between 85 Vac and 264 Vac at 47 to 63 Hz.
• Thermal, over-voltage, and over-current protected: If temperature, voltage, or current
exceeds the normal range (Tabl e 9-4 ), all voltages or currents shut down. Cycle AC power
to reset.
• Remote sense for +3.3 Vdc, +5 Vdc, and ground.
• Fused primary voltages. The fuses are located under the power supply cover.
• Battery supplies 2.5 A for 5 ms as the current decreases during power-down.
• Battery powers +5 VSB converter, if battery voltage is greater than +5.88 V, and if the
+12 VSB is less than 9 Vdc. When the system is in this state, the battery is not charged. Bat-
tery does not power +5 VSB converter if +12 VSB is greater than 9 Vdc and the battery is
charged during this state.
• Generates system reset signal using state of the Acquisition Power Supply and Platform
Power Supply.
• Platform Power Supply functions correctly if the Acquisition Supply is not inserted or is
inserted and functioning correctly. If something occurs to take the Platform Power Supply
down, the Acquisition Supply also suspends operation. This may happen if the power supply
is working correctly and a voltage goes out on a system PCB.
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