WorkHorse H-ADCP Operation Manual
May
2015
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 69
Remove the Original Set of Boards
To remove the original boards:
1. Remove the housing assembly from the transducer. Use
for instruc-
tions.
2. With your earth-ground static protection strap on, use a 3mm Allen wrench, to remove the four
bolts that secure the three original H-ADCP boards to the Transducer assembly.
3. Note the orientation of the transmit cable connector as it is plugged into the PIO board and to the
Receiver board (see Figure 28).
This cable must be removed and it has a very tight fit. To remove this cable, lift straight up on the
three boards and tilt slightly (no more than 2 cm) toward the cable. This should allow you enough
slack to unplug the cable from the PIO board. If this is not possible you may unplug the cable from
the Receiver board. Be sure to note its orientation before unplugging.
Figure 28.
Transmit Cable
4. Once the transmit cable has been disconnected you may now remove the top three boards as a set
by lifting the set straight up.
These top three boards are connected to each other via connectors and will remain as one piece
(see Figure 29). The DSP board connects to the Receiver board through a 26-pin header. The 26-
pin header is a series of male pins. The 26-pin header may or may not stay connected to the DSP
board when you remove the top three boards. If you see that there are male pins sticking out of
the DSP board when you finish removing the board set then the header has remained attached to
the DSP board. If this happens remove it and place it into the Receiver board. To remove it, gently
rock it back and forth while pulling it away from the DSP board. Once removed, align it with the
connector on the Receiver board and press it into place.