The Berthel SPS Technik C7.170.1305/02 is a control‑circuit board (CPL) used in Heidelberg press dryers and aqueous coating units such as CD 102, SM 74, and SM 102 models. Common failure modes for this class of boards include burnt or cracked ICs, damaged power supply regulators, and degraded solder joints on the high‑current I/O lines; moisture ingress can also cause intermittent communication with the main PLC. First‑check diagnostics: verify that the board receives its rated 24 V DC input and check all voltage rails (±12 V, +5 V) for correct levels; inspect the board visually for burn marks or cracked traces, especially around the power modules; and review any error codes logged in the machine’s diagnostic console to pinpoint a specific module fault.[oss-gpt-20b]