Raypak RP2100 601588 board

Raypak RP2100 601588 is the main PCB that drives the digital control and temperature display for Raypak gas pool/heater units (models 85A‑335B, etc.). Common failure points on this board include burned or tripped MOSFETs in the power stage, damaged relay driver ICs, cracked solder joints on the temperature sensor inputs, and failure of the LCD backlight driver. First‑check diagnostics: verify that the board receives its rated 12 V DC input and that the regulator output is within spec; inspect all surface‑mount components for visible damage or burn marks; and confirm that the display LEDs and backlight are functioning by checking voltage at the LED driver pins.[oss-gpt-20b]

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