With the exception of the 5088 mounted at the bottom right just above the Level trimpot, all six of the other transistors are mounted backwards. Their flat and rounded sides should align with the shape printed on the PCB. These transistors will all need to be desoldered and remounted in the correct orientation for the circuit to function properly.
Removing components with three (or more) leads is a bit of a tricky business and care must be taken to avoid damaging the PCB eyelets. If you want to reuse the transistors, you'll need to remove virtually all of the solder holding them in their eyelets. A combination of a
solder sucker and good quality
desoldering braid is strongly recommended for this purpose. Properly done, the transistor will virtually fall out of the PCB. Once the transistor has been removed, use these same items to clean up any residual solder in the eyelets to prepare them for remounting the tranny.
Alternatively, you can opt to just replace the transistors--
BYOC sells both types for 70 cents apiece. In that case, you can just clip off the head of each tranny and then desolder one lead at a time, a far easier and less risky process. Clean up any residual solder in the eyelets and you're ready to install the new transistors.
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“My favorite programming language is SOLDER” - Bob Pease (RIP)
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