GE MAC 1200

GE Medical Systems MAC 1200 V 1.2 Page 12
Information Technologies 227 492 21 Rev F
2.2.2 Device behavior depending on the state of battery charge
Depending on the status of the battery and the status of the device, the following behavior
occurs:
State1: Battery depleted, line power supply is connected up:
Baitery charged in rapid mode; when fully charged, switchover to trickle
charging.
State 2: Battery full, line power supply is connected up:
Battery charged in rapid mode for some minuies till the charging circuit
recognizes “battery full", then switchover to trickle charging.
State 3: Battery depleted, no line power supply, device is switched on:
Device inoperative.
State 4: Battery full, no line power supply, device is switched on:
Device fully operative.
When battery is almost depleded, the LEDBAT signal is activated to
Indicate that the device should be charged by connecting to the line
power supply. If the operation is continued without line power, MAC
1200 will shut down itself when a minimum level is reached to prevent
the battery from a excessive discharge.
State 5: Battery depleted, line power supply is connected up, device is switched
on:
Battery is charged in rapid mode, device is fully operative, including
recording.
During recording, the charging current is reduced. If in this phase, a lot
of recordings take place, the battery is not fully charged within 4 hours.
2.3 PCB Control CS CI
The PCB Control CS_CI is the mainboard of the MAC 1200 and accommodates the control
functions of the device, except the line power supply and the NC battery-charging
controller.
2.3.1 Generation of internal power supplies
Logic power supply + 5V and + 3.3V
The processor core and the memory is a + 3.3V design.