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Top-level
 Using this tool, insert it, and try to put a finger either side of the tab... then just push! You will need pliers or a sacrificial surface to push against - it's quite a stiff operation. Once you've got the tab flush with the outer body, you've actually blocked yourself from getting to the other tab. So revert to a screwdriver to open the tab the rest of the way. 9 comments
The final hurdle is probably the label... I've taken apart some modules where the label is not an issue, and others (like this one - oopsy), where the label interferes and gets scuffed. A screwdriver can be inserted under the EMI fingers to just lift the sheath slightly away from the label. We're in! The retention mechanism (handle & clip) will almost certainly fall on the table, so make sure you rescue them. There may also be a plastic shim to keep the ROSA / TOSA securely in place, but not all modules have this. Finally, a single screw will usually allow the PCB to lift away from the chassis. There are sometimes metal features on the chassis to "hold" the PCB at the far end from the screw, but not always - just be gentle and it'll come out. Watch out for a thermal interface! Finally, here are all the bits. No thermal interface in this module, which was a little unexpected. If I remember correctly, the GPON modules I've opened had it... 80km is definately further, but perhaps 100Mbit/s is the key factor here for power dissipation. |
Gregory's Server
Once you've done one tab, and cleared the opening... do the next tab!
The sheath will now slide a little more than it did before. To fully release it, you'll need to take care of the main retention mechanism that keeps the module in the parent equipment's cage. Depress the triangle, and slide the sheath further.
This final clip is actuated by the main release handle, but that doesn't generally get it far enough out of the way to remove the sheath (only remove the module from the cage).