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