GE Voluson i BT06, Service Manual

Page: 261 / 516

GE V
OLUSON
i / V
OLUSON
e
D
IRECTION
KTI106052, R
EVISION
10 S
ERVICE
M
ANUAL
Chapter 5 - Components and Functions (Theory) 5-29
5-5-3 Power Management
5-5-3-1 Power Operating Modes
The Power Supply unit supports the following operation modes:
5-5-3-2 Critical Temperature Sensor
The PS Unit includes a temperature sensor that will shutdown the DC-DC power supply if a critical
temperature is reached inside the PS.
After the temperature settles down the PS will enable the DC -DC operation.
Mode
Description
Shut Down
• Front End is OFF
• BEP is OFF. Only the PMC (Power Manager Controller) is working
(powered by 3.3V_STB [less than 2ma])
• In case an external DC is applied, the PS should be powered and the charger should be
activated (unless the battery is fully charged) in all modes except
Scanning
to avoid noise
introduction during battery charging.
Standby
• The Back End Processor (BEP) is in standby mode.
Scanning
• Both Back End & Front End are ON