Jandy PCB # 8124A 8124A

The Jandy PCB #8124A is the main power‑center board for the AquaLink RS pool control system, handling 25 V AC input and distributing power to the controller modules. Common failure modes include a blown or tripped 3 A fuse, loss of 25 VAC supply, visible burn marks on trace pads, or corrosion at connector pins; these symptoms often manifest as a non‑operational Power Center with no indicator lights. First‑check diagnostics: verify the 25 V AC feed and confirm the 3 A fuse is intact, inspect the board for burn damage or loose solder joints, and test continuity of critical power traces (e.g., VCC to ground) while checking I/O connector integrity.[oss-gpt-20b]

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