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Operating Temperature Diagnostic Checks; Test Points, Connectors And Jumpers; Test Points - Philips IntelliVue MP70 Service Manual

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Troubleshooting the Anesthetic Gas Module

Operating Temperature Diagnostic Checks

Symptom
Oper. Temp. shows
Problem

Test Points, Connectors and Jumpers

Test Points

The following table lists the test points; also refer to Figure 51.
7HVW 3RLQW
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
TP9
Possible Cause
Defective fan
Insufficient air
circulation due to fan
working inefficiently
Operating environment
for the module falls
outside of specified
limits
Defective IR
measurement assembly
head
Defective agent ID
head
Defective power supply Follow its corrective action
Defective main PC
board.
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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
(O
SIG). Signal varies with O
2
concentration.
Analog Ground 2 (AGND2)
9 Anesthetic Gas Module
Corrective Action
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
environment.
Follow its corrective action.
Follow its corrective action
If the checks above do not solve the problem,
replace the main PC board.
7ROHUDQFH 9DOXH “
400mVpp ±30mv
7.87 V ±20mv
250mV ±100mV
(after at least 15
min. warm-up)
Examples: 20.8% O
is approx. 208mV,
2
50.0% O
500mV
1
2
is approx.
2
223

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Intellivue mp60

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