Gambro AK 95 S, Service Manual

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AK 95 / AK 95 S Service Manual
HCEN 9134 Rev. 10.2005
Technical Description
2:25
Figure 14. Block diagram, power supply
Block Diagram Description
The mains voltage is fed to an AC/DC converter
which generates different DC supplies to the
monitor.
•Two +5 volt supplies, one for the control system
and the other for protective digital electronics.
•±12 volt is used for analog electronics.
•+24 volt is used for lamps, displays, blood-
pump, heparin pump, clamps, pumpmotor
(flow pump, suction pump), valves, fan and the
heating relay.
• The lower +12 V is a standby voltage for the
ON/OFF logic.
The mains voltage also supplies the voltage to
the heating element.
In a mains power failure situation, the AK 95 S
gives an intermittent buzzer alarm and performs
a recovery, when the power returns. All the
settings and accumulated values are stored in
the machine. The treatment will be continued
from where it was interrupted.
AK 95 S will perform a recovery when the
monitor is in treatment or disinfection.
In service and preset mode the monitor will start
with a Fch.
AC
DC
Battery
24 V
External fuses
Internal fuses
MAIN SWITCH
MAINS INPUT
MAINS to heater rod
12AH
12AH
+5VDC
+5VDC
±12VDC
+24VDC
+12VDC
AC
DC
Filter
Filter