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FTS-3 Fetal Telemetry System Service Manual
Principle Introduction
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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
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
Figure 7- 3
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