Fix 20230721
A quality issue with the SMT (surface mount) audio jacks used in Aquarius+ prototype units numbered PR-03-SPH through PR-07-SPH has been found that compromises the adhesion of the Cassette In, Cassette Out, Printer, and Audio Out jacks.
The problem can show up as the audio jack separating from the PCB, possibly pulling up and damaging the traces (wires) on the board.
The source of the problem is an inconsistent application of solder to the SMT audio jacks. These SMT audio jack components were replaced with THT (through-hole) components in subsequent models. It is a good idea to perform the simple fix to ensure the longevity of your Aquarius+ unit.
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Open your Aquarius+ by carefully removing the four Phillips-head screws on the bottom of the case. Do so in a clean, antistatic environment where you have room to work.
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Remove the PCB from the case and locate audio jacks J3 (Audio Out, top middle of the PCB), J5, J6, and J8 (Cassette Out, Cassette In, Printer, top left of the PCB). Using jack J3 as an example, note that there are three pads on each jack, usually with less solder than is appropriate.
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Using a soldering iron and a small bit of solder, add enough solder to cover the pads (on the PCB) and the connectors (on the audio jacks). Since the connections are not very close to one another, it is a relatively easy fix to make, but be careful to use only as much solder as necessary to reinforce the joint between the PCB and the audio jack legs. Repeat this process for ALL FOUR audio jacks.
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Clean up any debris or residue using isopropyl alcohol and a Q-tip, allow to dry, and reinstall the PCB in the Aquarius+ case, taking care when putting the screws back in place to not overtighten them. The plastic resin of the case is strong, but threads can strip out if too much force is used.
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Reconnect your Aquarius+ and resume normal use.
Thanks for your patience in this process. The BOM on all new orders specifies the THT (through hole) version of this part, so relatively few users were affected.