Sony cube alarm clock7/1/2023 ![]() ![]() Sony's entire circuit is an exercise in cost savings and I cannot recommend using any Sony ICF-XXX clock to accurately keep time. Vintage Sony Dream machine white AM/FM radio cube alarm clock model ICF-C120 battery back up bedside table alarm clock retro (205) CA86.40 CA96.00 (10 off) FREE delivery Vintage Sony Dream Machine Cube Alarm Clock Radio Retro 90s White FM/AM Bedside Electronic Digital Display Model ICF-C120 Modernist Decor (3.5k) CA69. It gave him music in his own room his own choice of station. Someone else figured out that you can add the TCXO instead, though your results may vary. It's a Sony cube incorporating clock, AM/FM radio, and alarm. The best accuracy that can theoretically be achieved is ☒0ppm at room temperature (~10.34 minutes gained or lost/year), but with the temperature swings on the board it's going to be worse than that.Īn option which I haven't tried is to replace the XTAL with a DS3232 TCXO. Normal alarm sounds with a preset volume are either too low to wake you up. ![]() ![]() Get it Tuesday, Oct 11 - Saturday, Oct 15. There is an onboard crystal oscillator (part S3X1, X2 on the PCB schematic) supplying the 32.768K oscillations. Nice & rare Sony vintage Digicube (Digital Clock Radio) in yellow plastic dating from late seventies / early eighties. Sony AM/FM Alarm Clock - White - ICFC1W - Open Box or Display Models Only. Sony ICF-C1T AM/FM Radio Alarm Clock with Date and LED Display Radio alarm clock metallic silver. You can find the datasheet for this by searching the sister part number LC87FBG08A (with a different footprint), for example the datasheet is available via Mouser. Here Sony is using a generic 8-bit microcontroller and running the clock off the base time-of-day counter w/out an RTC and w/ the lithium battery as a backup power source. You can't really fix this - I have the same clock and the problem is that Sony was too cheap to use a proper IC that tracks the time via the AC mains frequency (which power companies go to great pains to ensure averages exactly 50 or 60Hz over time). ![]()
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