4.6.10 Troubleshooting the Toroidal Transformer
Perform the following tests in service mode. The referenced voltages should always be present when the unit is
in service mode. In normal operating mode, the voltages are not present if safety relay 2 contacts are open.
1. Check the output voltage of the toroidal transformer at J44 pins 1-2 and at J44 pins 3-4. Voltages should
be about 15 volts AC .
2. If the voltage is not present verify that mains voltage is present at the primary input to the toroidal
transformer in service mode. This voltage can be measured at relay board connector J51 pins 1-2. It can
also be measured at the conguration plug on the toroidal transformer pins 1-4.
3. If the primary voltage is present and there is no output voltage, the toroidal transformer is defective.
4. If the primary voltage is not present, then replace the relay board.
4.6.11 Interpreting Serial Numbers
Datex-Ohmeda products have unit serial numbers with coded logic which indicates a product group code,
the year of manufacture, and a sequential unit number for identication. The serial number is in the following
format:
AAAX11111
The X represents an alpha character indicating the year the product was manufactured; H = 2004, J = 2005,
etc. I and O are not used.
© 2001 by Datex-Ohmeda, Inc.. All rights reserved. 6600-0356-000 103 57
Chapter 4: Troubleshooting
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