4-84 120 Series Maternal/Fetal Monitor Revision B
2015590-001
Theory of Operation: Recorder Board
Table 4-31. Head Output Connector J4
Pin Number Signal Name Signal Description
1 VH +V Head Supply Voltage (15.5 V nominal)
2 VH +V Head Supply Voltage (15.5 V nominal)
3 GNDH VHEAD Supply Ground Return
4 GNDH VHEAD Supply Ground Return
5 STRB4/ Strobe Line for 4th Set of 256 Dots
6 STRB3/ Strobe Line for 3rd Set of 256 Dots
7 GNDVR Logic Ground
8 +5VR +5 V for Logic
9 No Connection —
10 No Connection —
11 STRB2/ Strobe Line for 2nd Set of 256 Dots
12 STRB1/ Strobe line for 1st set of 256 dots
13 CK Ground
14 LDD/ Recorder Load Line
15 BEOB Head Data Enable Line (Active High)
16 DATA Recorder Data Line
17 GNDH VHEAD Supply Ground Return
18 GNDH VHEAD Supply Ground Return
19 VH +V Head Supply Voltage (15.5 V nominal)
20 VH +V Head Supply Voltage (15.5 V nominal)
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