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Some MCK 2245 units have a "Ritardo" (delay) input for external correction. You can connect a GPS receiver with a PPS (Pulse Per Second) output. You will need a level converter (GPS is 3.3V or 5V; Solari expects 24V). The manual’s correction logic shows that a low-going pulse of >50ms will reset the minute counter.
The MCK 2245 is low-maintenance, but specific "manual work" is required if the display malfunctions.
To understand the work required for this unit, one must understand the technology:
The MCK 2245 is a microprocessor-based unit designed to drive Solari flip-panel displays. It typically handles time display, alternate date/temperature cycling, and synchronization.
| Interval | Task | |----------|------| | Monthly | Visually inspect for stuck flaps. Run test pattern for 5 minutes. | | Quarterly | Clean dust from rear vents. Check cable connections. | | Yearly | Lubricate flap drum axles with dry PTFE spray (no oil). | | As needed | Replace burnt flap coils (12Ω nominal, measure with multimeter). |
Do not panic. The MCK 2245 shares its logic core with other Solari models (e.g., MCK 2200 series). A generic Solari master clock manual will cover 80% of your needs, particularly the wiring color codes: Italian industrial standard (Rosso = +24V, Nero = GND, Blu = Impulsi).