Chapter 9 Modules' Malfunction Verification; Verifying Malfunction Of The Main Board - EDAN FTS-3 Service Manual

FTS-3 Fetal Telemetry System Service Manual

Chapter 9 Modules' Malfunction Verification

When a module is suspected of malfunction, verify it with the method described in this chapter.
NOTE:
For all the interfaces, the first pin is the one with a square solder pad.

9.1 Verifying Malfunction of the Main Board

To verify the main board,
1) Open the base station using the procedures described in section 10.3.
2) Switch on the base station. (Powered by AC or battery.)
3) Measure the voltage to earth of the pins listed below, using a multimeter:
Item
○
1
○
2
○
3
○
4
○
5
○
6
Pin
TP1
TP4
TP5
TP9
TP10
TP11
Figure 9- 1 Main Bboard
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Modules' Malfunction Verification
Reference result
+5V5 (4.95~6.05) V
+3V（2.7~3.3）V
+2V5 (2.25~2.75) V
RF_3V3（2.97~3.63）V
VCC (2.97~3.63) V
+5V (4.5~5.5) V