Verifying Malfunction Of The Decg Module - EDAN F9 Service Manual

F9 Fetal & maternal Monitor Service Manual

9.3 Verifying Malfunction of the DECG Module

To verify the DECG module,
1) Open the main unit using the procedures described in section 10.3.
2) Disconnect the DECG cable connector from the bottom interface board.
3) Switch on the monitor.
4) Measure the voltage to earth of the following pins on the bottom interface board, using a
multimeter:
J16
J15
st
5) Measure the 1
detected.
6) If all the results are in the reference range, reconnect the DECG cable and measure the
voltage to earth of the following pins on the DECG board.
Item Pin
st
○
1 pin of J9
1
nd
○
2 pin of J9
2
th
○
5 pin of J9
3
J9 J14
Bottom Interface Board
J3
pin of J9 with an oscillograph. A 0V ~ 5V pulse string signal should be
Modules' Malfunction Verification
Reference result
MB_RXD3
MB_TXD3
(+5 ±5%) V
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