SonTek/YSI Argonaut-XR Technical Manual - HydroScientific West

8-pin UWM Male
IL-8-MP
to Argonaut Housing
5.6. Accessing Electronics
Argonaut Operation Manual Firmware Version 7.9 (May 1, 2001)
SonTek/YSI
The Argonaut electronics should not need to be accessed on a regular basis. This section contains
basic instructions for opening the Argonaut electronics housings. The most common reasons for
opening any of the Argonaut underwater housings are to replace the battery pack (§5.7) or to
modify the compass installation (§4.2). Additionally, there may be periodic upgrades to the
Argonaut CPU EPROM and other programmable chips; see §5.6.3 for installation instructions.
5.6.1. Argonaut MD
Pin#
2-pin Underwater Male
LPMIL-2-MP
To Battery Housing
Pin#
1 2
Pin#
1 External Power
1
2 Data Out / Tx+
2
3
4
5
6
7
8
Data In / Tx-
Drain
Battery Power
Rx+
Rx-
Ground
Not Connected
Figure 11 – Argonaut XR/SL Splitter Cable Wiring
8-pinUnderwater Female
IL-8-FS
To Power and Communication
Cable / Dummy Plug
To access the Argonaut MD processing electronics and internal compass, use the following steps.
1. Perform all maintenance in a static safe environment.
2. See §5.2.1 for a general description of the internal layout of the Argonaut MD. See §5.3 for a
detailed description of the Argonaut processor and internal connectors.
3. Remove the bottom end cap and batteries following the instructions in §5.7.1.
4. Remove the three screws holding the sensor head to the pressure housing.
5. Carefully lift the head from the housing. Because of the bore seal o-ring, the transducer head
may be difficult to remove. If necessary, have one person hold the housing while another
person twists the transducer head back and forth.
6. Lift the head, electronics, and internal wiring out of the housing.
7. The input power wiring from the battery pack / end cap is connected to a wiring harness
attached to the internal mounting hardware (where the additional voltage regulator is
installed) and the Argonaut analog board. Disconnect the internal wiring from the harness at
the 3-pin white plastic connector. See §6.1 regarding Argonaut input power.
8. Disconnect the 5-pin red serial communication connector from the internal wiring to the CPU
board (marked User on the analog board).
9. While open, protect all o-rings and o-ring surfaces from damage.
3
4
5
6
7
8
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