Troubleshooting the Anesthetic Gas Module
Operating Temperature Diagnostic Checks
Oper. Temp. shows
Test Points, Connectors and Jumpers
The following table lists the test points; also refer to Figure 51.
circulation due to fan
for the module falls
outside of specified
Defective agent ID
Defective power supply Follow its corrective action
Defective main PC
Analog Gnd 1 (AGND1)
Analog Dark Level Clamp (10DLCL)
M1026A Preamp Signal
M1026A A/D Converter Input
AC Pump Motor Reference (not used)
IR source voltage for IR measurement
assembly head (R178)
Thermal Electric Cooler Drive Voltage to
M1026A Head (TE+)
Oxygen Transducer Signal Output
SIG). Signal varies with O
Analog Ground 2 (AGND2)
9 Anesthetic Gas Module
Check that the fan runs smoothly and check
its cable. If necessary, replace fan or cable.
Check the fan aperture for blockages or dust
on the fan blade or guard. If necessary,
unblock or clean the fan aperture.
Do not operate the module in such an
Follow its corrective action.
Follow its corrective action
If the checks above do not solve the problem,
replace the main PC board.
7.87 V ±20mv
(after at least 15
Examples: 20.8% O
is approx. 208mV,