Indicative Light Board - EDAN FTS-3 Service Manual

FTS-3 Fetal Telemetry System Service Manual

7.1.2 Indicative Light Board

Indicative light board controls power light, AC light, battery charge light and transducer working
status. Meanwhile, the board is in charge of transforming +12V into +5.5V for charging the
transducer.
（1） Indicative light board ports to main board
Figure 7- 3
Pin No. Symbol
1,3 VCC
5,7 GND
4 +12V
7 LED1_R
9 LED1_G
11 LED2_R
13 LED2_G
15 LED3_R
17 LED3_G
6 TRANS1_TX
8 TRANS1_RX
10 TRANS2_TX
12 TRANS2_RX
14 TRANS3_TX
16 TRANS3_RX
20 POWER_RXD
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Principle Introduction