YSI SonTek ADVField, Technical Documentation Manual

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SonTek/YSI
58 ADVField Operation Manual (September 1, 2001)
canister while another unscrews the lid. Once started, the end cap should rotate easily; it re-
quires about four turns to undo all threads.
3. Lift the end cap away from the canister. Be careful not to damage the o-ring seal between the
end cap and canister. The end cap is connected to a plate on which the processing electronics
are mounted.
4. Pull the end plate and electronics completely out of the canister. If the system includes inter-
nal batteries, disconnect the cables from the two battery packs to the processing electronics.
Place the end plate / electronics assembly in a static-safe area.
To disassemble the processor board stack:
1. Note the position and orientation of the cables from the end plate to the electronics. See §4.1
for the location of the connectors referred to below.
2. Remove the red, 2-pin input power connector from the Analog board. This cable goes to the
power and communication connector on the end plate.
3. Remove the red, 2-pin battery backup connector from the Analog board (systems with inter-
nal recorder only). This cable goes to the backup battery mounted under the electronics.
4. Remove the black, 16-pin probe connector from the Analog board. This cable goes to the
probe connector on the end plate.
5. Remove the black, 10-pin temperature/pressure connector from the Analog board. This cable
goes to the probe connector on the end plate. This connector is
not
keyed; it is oriented such
that the two wires are connected to the pins farthest from the input power connector.
6. Remove the black, 16-pin auxiliary input/output connector from the DSP board. This cable
goes to the power and communication connector on the end plate.
7. Remove the black, 10-pin serial communication connector from the CPU board. This cable
goes to the power and communication connector on the end plate. All cables from the end
plate to the board stack should now be disconnected.
8. Remove the four #4-40 screws securing the four corners of the Analog board.
9. Remove the Analog board by lifting straight up from the DSP board. These two boards are
joined by card connectors at each end; be careful not to bend any pins.
10. Remove the four hex standoffs (1/4” wrench size, 1/2” tall, #4-40 thread) securing the four
corners of the DSP board.
11. Remove the DSP board by lifting straight up from the CPU board. These two boards are
joined by a card connector at one end; be careful not to bend any pins.
12. Remove the four hex standoffs (1/4” wrench size, 1/2” tall, #4-40 thread) securing the four
corners of the CPU board.
13. Remove the CPU board by lifting straight up from the Recorder board (if installed). These
two boards are joined by a card connector at one end; be careful not to bend any pins. If the
recorder is not installed, the CPU can be removed directly.
14. If necessary, remove the Recorder board by removing the four hex standoffs (1/4” wrench
size, 1/2” tall, #4-40 thread).
To re-assemble the processor board stack:
1. Install the Recorder board and secure with four hex standoffs (1/4” wrench size, 1/2” tall,
#4-40 thread). Be certain to install this board in the same orientation in which it was previ-
ously installed (with the PCMCIA card at the opposite end from the end cap).
2. If the Recorder is present, connect the CPU board to the Recorder board by aligning and se-
curely seating the card connector. Be sure that all pins are firmly set and that no pins have
been bent or damaged. If no recorder is present, install the CPU and secure with four hex