Central Unit - GE Datex-Ohmeda S/5 Technical Reference Manual

Datex-Ohmeda S/5 Anesthesia and Critical Care Monitors

4.1 Central Unit

Disconnect mains power cord.
Remove all plug-in modules.
Disconnect Airway module.
Disconnect Command board.
Connect mains power cord and
turn power on by shorting pins
13 (GND) and 20 (ON/STBY) at
Gas interface board connector.
Yes
Remove Power supply unit and
turn it on by shorting pins a14
Figure 9
30
.
Document no M1125635-05
Central Unit faulty
Check mains fuses.
Does Central Unit work?
No
Check fuses on Power
Supply Board.
Does Central Unit work?
No
Is fan
running?
No
(ON/STBY) and a18 (GND). See
chapter 2.4.1 connector X3 .
Is fan
running?
No
Are
power supply
voltages
OK?*
No
Power supply board/unit
faulty. Replace it.
Central Unit troubleshooting flowchart
CPU mother board or Gas
Yes
interface board faulty.
Check continuities of ground
and ON/STBY line through to
Command board.
Digital section faulty. Go to
Yes
"Digital section troubleshooting
chart".
* see 2.4.1 connector x3
5V
5V CPU
+15 V
- 15 V
+32 V