Power Supply Unit, F-Cu8 Rev.12 - GE Datex-Ohmeda S/5 Technical Reference Manual

Datex-Ohmeda S/5 Anesthesia and Critical Care Monitors

2.1.1 Power supply unit, F-CU8 Rev.12

Power supply unit contains three PC boards (power supply board, power logic board, and
Battery switch board) and four external components (mains transformer, fan, loudspeaker, and
lead acid battery).
All the operational controls in the power supply unit are located in the three PC boards.
Mains
transform er
External
battery
Battery
in
switch board
24 V
ON/STBY
switch on
Command
Board
c
SILENCE ALARM
Dip Switch on
Power Supply
Loud-
speaker
Figure 3
4
.
Document no M1125635-05
T 10 A
Rectifiers,
power
factor
correction
c
*Power
ON/STBY
c
control,
batchrg,
etc.
c
c
+32 Vd
FAN
15 Vd +5 Vcpu
c
*AUDIO
c
Board
AMP.
BATCHRG
6 V
battery
2AF
c
*CPU
Service
INTERFACE
reset
button
c
Power supply unit block diagram (F-CU8, rev. 12)
+5 Vint
ON/STBY
32 V
STOP
*Power ON/STBY control, AUDIO AMP.,
c
and CPU INTERFACE are in Power Logic Board.
All other functions are in Power Supply Board.
+32 Vd
+32 Vd
switch
-15 V
+5 Vcpu
and
-15 V
converter
+5 Vcpu
c
c
+15 Vd
+15 Va
+15 V
converter
c
AUDIOin
+5 V
+5 V
converter
c
RESET CPU
RESET
POW ERFAIL
W D
GND